CN105013275B - A kind of purifying method for boiler fume - Google Patents
A kind of purifying method for boiler fume Download PDFInfo
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- CN105013275B CN105013275B CN201510263605.4A CN201510263605A CN105013275B CN 105013275 B CN105013275 B CN 105013275B CN 201510263605 A CN201510263605 A CN 201510263605A CN 105013275 B CN105013275 B CN 105013275B
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Abstract
The invention discloses a kind of purifying method for boiler fume, including electrostatic precipitation and desulfurized step, also include evaporating baking step, electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator, removes the most of dust in flue gas；Desulfurized step refers to that the flue gas after electrostatic precipitation step is sprayed with the alkali liquor in vertical shaft electric field and mixes, and grey particle trickle in flue gas and sulfur dioxide are gathered into little group under electric field force, the gathering of alkali liquor spraying, capture, coalescence effect and stick on the electrode of vertical shaft electric field；Evaporation baking step refers to that after desulfurized step the soot particle of residual is atomized current punching that device formed in evaporation drying box, and buck is evaporated and obtains final clean flue gas by the waste heat of evaporation drying box and flue gas jointly.Alkali liquor after the present invention can make trickle grey particle in flue gas and atomization is sufficiently mixed, and sloughs the sulfur dioxide in flue gas, the secondarily polluted water that can effectively prevent again ash, aqueous mixtures from causing, has good gas cleaning effect.
Description
Technical field
The present invention relates to boiler smoke udst separation technical field, particularly relating to one can thorough purification boiler flue gas
And the method not producing secondary pollution.
Background technology
In recent years, atmospheric pollution is more serious, the coal-burning boiler that uses in thermal power plant, Industrial Boiler, heating boiler,
The kiln that iron and steel enterprise uses coal to be fuel all can have substantial amounts of sulfur dioxide, nitrogen to airborne release substantial amounts of flue gas in flue gas
Oxygen compound and dust, these noxious substances also arrange to air with flue gas, and this is the primary pollution source of atmospheric pollution, conventional
Although Electric Scrubber Efficiency has reached 99%, but the lowest for its efficiency of dust collection of the thinnest dust；Sack cleaner pair
There is higher efficiency in tiny dust, but resistance is the biggest, will consume substantial amounts of electric energy, the best with current energy-saving and emission-reduction
Situation is incompatible with, uses unit very few, and this just makes the trickle grey particle in air exceed standard in a large number, and the generation for haze carries
Supply sufficient material base.
All considerations based on factors above, in the urgent need to finding a kind of purifying method for boiler fume, can be to trickle ash
Particle is effectively removed, and can absorb again the sulfur dioxide in flue gas, oxynitride in a large number, thus reduce haze incidence rate,
Improve air quality.
Publication No. CN 102476025A, publication date is that the Chinese patent literature of on 05 30th, 2012 discloses one
Boiler smoke dust-collecting sulfur-removing method, it is characterised in that described sulfur method, walks including electrostatic precipitation and swirl-spray desulfurization etc.
Suddenly, specifically comprise the following steps that 1), E field electrostatic dedusting: recovery boiler flue gas use E field electrostatic dust collection method it is carried out electrostatic
Dedusting；2), desulfurization: using Dual alkali technique, first step NaOH solution is the sulfur dioxide in the first Alkali absorption flue gas, then uses
Calcium carbonate carbide slag liquid is the second alkali, the NaOH in regenerable absorbent first step liquid, obtains desuifurized；3), the NaOH after regeneration
Absorbing liquid is sent desulfurizing tower back to and is recycled.
Boiler smoke dust-collecting sulfur-removing method disclosed in this patent documentation, can only big in flue gas by E field electrostatic dedusting
The dust of granule adsorbs, and its efficiency of dust collection of the thinnest dust is poor, and through sodium hydroxide solution and calcium carbonate carbide
The desuifurized liquid that slag liquid obtains after processing easily causes secondarily polluted water, has a strong impact on environmental quality.
Summary of the invention
The present invention is in order to overcome the defect of above-mentioned prior art, it is provided that a kind of purifying method for boiler fume, the present invention can
Make the alkali liquor after trickle grey particle in flue gas and atomization be sufficiently mixed, slough the sulfur dioxide in flue gas, can effectively prevent again
The secondarily polluted water that ash, aqueous mixtures cause, has good gas cleaning effect.
The present invention is achieved through the following technical solutions:
A kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, it is characterised in that: also include evaporation
Baking step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator, and electrostatic precipitator removes
Most of dust in flue gas；Described desulfurized step refers to the flue gas after electrostatic precipitation step and the alkali liquor in vertical shaft electric field
Spraying mixing, grey particle trickle in flue gas and sulfur dioxide are under electric field force, the gathering of alkali liquor spraying, capture, coalescence effect
It is gathered into little group to stick on the electrode of vertical shaft electric field；Described evaporation baking step refers to that the soot particle of residual is sprayed after desulfurized step
The current punching that day with fog is formed in evaporation drying box, evaporation drying box jointly buck is evaporated with the waste heat of flue gas obtain the cleanest
Neat stress.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field is by vertical shaft, conducting rod, the electrode being positioned at vertical shaft and the high-voltage electrostatic power being positioned at outside vertical shaft
Constituting, the positive pole of high-voltage electrostatic power is connected with the outer wall of vertical shaft by wire, and negative pole is connected with electrode by conducting rod.
Described electrode is made up of corona discharge electrode and the prickle wire being distributed in around corona discharge electrode.
The voltage of described high-voltage electrostatic power is 20-60 kilovolt continuously adjustabe.
The spraying of described alkali liquor refers to that using aerosol apparatus to be sprayed by the alkali liquor in alkali liquid tank forms vaporific alkali liquor.
The pressure of described aerosol apparatus is 2.2-2.8 MPa, and the fountain height of alkali liquor is 100-300 kg/hr.
Described aerosol apparatus is by the rotating disk being enclosed within sparge pipe, the motor of driving rotating disk rotation and connects on the rotating pan
Shower nozzle constitute, shower nozzle is connected with sparge pipe.
Described aerosol apparatus is provided above the insulating frame for fixing conducting rod, and insulating frame is fixedly connected on the inwall of vertical shaft
On.
Described insulating frame be provided above porous homogenizing plate, porous homogenizing plate is slidably connected on the inwall of vertical shaft.
Described shower nozzle is made up of sprinkler body and the many venturi jet pipes being embedded on sprinkler body, and many venturi jet pipes are uniform
It is arranged on sprinkler body.
The bottom of described alkali liquid tank connects tee T, and tee T connects three sparge pipes, on three sparge pipes all
Connecting has an aerosol apparatus, three aerosol apparatus to be triangularly arranged in vertical shaft.
Heater that described evaporation drying box by casing, is fixed in casing and the supporting plate being slidably connected on cabinet wall
Constituting, the sidewall of casing is run through in one end of supporting plate.
Temperature in described evaporation drying box is 130-150 degree Celsius.
Beneficial effects of the present invention is mainly manifested in the following aspects:
One, in the present invention, the flue gas after electrostatic precipitation step is sprayed with the alkali liquor in vertical shaft electric field and mixes, flue gas
In trickle grey particle and sulfur dioxide just can be gathered into little group under electric field force, the gathering of alkali liquor spraying, capture, coalescence effect
Stick on the electrode of vertical shaft electric field；By evaporation baking step, it is possible to make the little group being gathered on electrode be formed together with alkali liquor
Current rush in the lump to evaporation drying box, and buck is jointly evaporated by evaporation drying box with the waste heat of flue gas, and purification simultaneously obtains
Clean flue gas is dried by evaporation case and discharges, and uses vertical shaft electric field and coordinates the method that alkali liquor sprays, it is possible to make in flue gas is trickle
Grey particle with atomization after alkali liquor be sufficiently mixed, slough the sulfur dioxide in flue gas；Ash after evaporation baking step, water mixing
Thing can be discharged again in time, it is possible to effectively prevents secondarily polluted water；Whole technical scheme has reached good gas cleaning effect.
Two, in the present invention, flue gas is used to draw step, can be quickly by evaporation drying box out clean by air-introduced machine
Neat stress pumps out, and is sent to chimney and enters air, effectively prevents flue gas from returning and alters.
Three, in the present invention, vertical shaft electric field is by vertical shaft, conducting rod, the electrode being positioned at vertical shaft and the high pressure being positioned at outside vertical shaft
Electrostatic potential source is constituted, and the positive pole of high-voltage electrostatic power is connected with the outer wall of vertical shaft by wire, and negative pole passes through conducting rod and electrode
Connect, use the vertical shaft electric field of this ad hoc structure, more uniform electric field can be formed in vertical shaft, so that in flue gas
Trickle grey particle accumulates on electrode in a large number, it is simple to improve postorder dust removing effects.
Four, in the present invention, electrode is made up of corona discharge electrode and the prickle wire being distributed in around corona discharge electrode, and prickle wire electric discharge is formed
Electric field, due to the opposite polarity of Charged Yu corona discharge electrode, just can be by lotus in corona zone and a part close near corona zone
Electricity dust deposit is on corona discharge electrode, thus reaches good dedusting purpose.
Five, in the present invention, the voltage of high-voltage electrostatic power is 20-60 kilovolt continuously adjustabe, can be according to smoke property and institute
The Dust Characteristics processed, adjusts the output voltage of supply dedusting in time, makes dedusting obtain the highest corona discharge power, reaches good
Good dust removing effects.
Six, in the present invention, alkali liquor spraying refers to that using aerosol apparatus to be sprayed by the alkali liquor in alkali liquid tank forms vaporific alkali liquor, mist
Shape alkali liquor can fully contact with the sulfur dioxide in flue gas, thus ensures the desulfurized effect of flue gas.
Seven, in the present invention, the pressure of aerosol apparatus is 2.2-2.8 MPa, the fountain height of alkali liquor is 100-300 kilogram/and little
Time, use specific atomisation pressure, it is possible to ensure that alkali liquor is formed finely dispersed vaporific, use specific alkali liquor fountain height, both
Can guarantee that good desulfurized effect, the secondary pollution that alkali liquor excess causes can be prevented again.
Eight, in the present invention, aerosol apparatus is by the rotating disk being enclosed within sparge pipe, the motor of driving rotating disk rotation and is connected to
Shower nozzle in rotating disk is constituted, and shower nozzle is connected with sparge pipe, uses the aerosol apparatus of this ad hoc structure, and shower nozzle can revolve freely
Turning, the spraying enabling alkali liquor to be formed more is uniformly adhered on electrode, thus farthest adsorbs the dioxy in flue gas
Change sulfur, reach good desulfurized effect.
Nine, in the present invention, aerosol apparatus is provided above the insulating frame for fixing conducting rod, and insulating frame is fixedly connected on perpendicular
On the inwall of well, conducting rod can be played good support, firm effect by insulating frame, prevents conducting rod from shaking.
Ten, in the present invention, insulating frame be provided above porous homogenizing plate, porous homogenizing plate is slidably connected at the interior of vertical shaft
On wall, flue gas can be played guiding peptizaiton by porous homogenizing plate, prevent flue gas localized clusters, so that vertical shaft electric field
Interior electrode more uniformly can comprehensively adsorb the trickle grey particle in flue gas, further raising flue gas ash removal effect.
11, in the present invention, shower nozzle is made up of sprinkler body and the many venturi jet pipes being embedded on sprinkler body, many venturi
Jet pipe is evenly arranged on sprinkler body, uses venturi jet pipe, and the alkali liquor in sparge pipe forms one by venturi jet pipe
Individual acceleration, the alkali liquor after ejection is more readily formed vaporific, so that alkali liquor can occur by the sulfur dioxide fully and in flue gas
Reaction, improves flue gas desulfurization effect further.
12, in the present invention, the bottom of alkali liquid tank connects tee T, and tee T connects three sparge pipes, three
Being respectively connected with an aerosol apparatus on sparge pipe, three aerosol apparatus are triangularly arranged in vertical shaft, and each aerosol apparatus can
Rotating freely, spatially can form multi-angle spraying, the maximized sulfur dioxide made in flue gas reacts with alkali liquor,
Greatly improve flue gas desulfurization effect.
13, in the present invention, heater that evaporation drying box by casing, is fixed in casing and being slidably connected in casing
Supporting plate on wall is constituted, and the sidewall of casing is run through in one end of supporting plate, and heater coordinates the waste heat of flue gas, it is possible to rapidly by ash,
Aqueous mixtures is evaporated, and just can remove the dust after being evaporated in time by pull-out supporting plate.
14, in the present invention, the temperature in evaporation drying box is 130-150 degree Celsius, uses this specific temperature, coordinates
Flue gas own temperature just can make ash, aqueous mixtures are evaporated rapidly, it is not necessary to too much assists heating, effectively save energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of flue purifier of boiler of the present invention；
Fig. 2 is the structural representation of flue purifier of boiler in the embodiment of the present invention 5；
Fig. 3 is the structural representation of aerosol apparatus in the embodiment of the present invention 5；
Fig. 4 is the structural representation of flue purifier of boiler in the embodiment of the present invention 6；
Fig. 5 is the structural representation of aerosol apparatus in the embodiment of the present invention 6；
Fig. 6 is the structural representation of flue purifier of boiler in the embodiment of the present invention 7；
Fig. 7 is the structural representation of evaporation drying box in the embodiment of the present invention 8；
Labelling in figure: 1, electrostatic precipitator, 2, vertical shaft electric field, 3, electrode, 4, aerosol apparatus, 5, evaporation drying box, 6, vertical shaft,
7, conducting rod, 8, vertical shaft electrode, 9, high-voltage electrostatic power, 10, corona discharge electrode, 11, prickle wire, 12, alkali liquid tank, 13, sparge pipe,
14, rotating disk, 15, motor, 16, shower nozzle, 17, insulating frame, 18, porous homogenizing plate, 19, venturi jet pipe, 20, tee T,
21, casing, 22, heater, 23, supporting plate.
Detailed description of the invention
Embodiment 1
See Fig. 1, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include that evaporation is dried
Dry step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, and electrostatic precipitator 1 removes
Most of dust in flue gas；Described desulfurized step refers to the flue gas after electrostatic precipitation step and the alkali in vertical shaft electric field 2
Liquid spraying mixing, grey particle trickle in flue gas and sulfur dioxide are in electric field force, the gathering of alkali liquor spraying, capture, coalescence effect
Under be gathered into little group and stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to the soot particle of residual after desulfurized step
The current being atomized device 4 formation rush to evaporation drying box 5, and buck is jointly evaporated by evaporation drying box 5 with the waste heat of flue gas
To final clean flue gas.
The present embodiment is most basic embodiment, uses the vertical shaft electric field of prior art, will be through electrostatic precipitation
Flue gas after step is sprayed with the alkali liquor in vertical shaft electric field and is mixed, and grey particle trickle in flue gas and sulfur dioxide just can be at electric fields
It is gathered into little group under the gathering of power, alkali liquor spraying, capture, coalescence effect to stick on the electrode of vertical shaft electric field；Dried by evaporation
Step, it is possible to the current making the little group being gathered on electrode be formed together with alkali liquor rush in the lump to evaporation drying box, evaporation drying
Buck is jointly evaporated by case with the waste heat of flue gas, purifies the clean flue gas obtained simultaneously and is dried by evaporation case discharge, uses vertical shaft
Electric field also coordinates the method that alkali liquor sprays, it is possible to makes the alkali liquor after trickle grey particle in flue gas and atomization be sufficiently mixed, sloughs
Sulfur dioxide in flue gas；Ash, aqueous mixtures after evaporation baking step can be discharged again in time, it is possible to effectively prevent secondary water
Pollute；Whole technical scheme has reached good gas cleaning effect.
Embodiment 2
See Fig. 1, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include that evaporation is dried
Dry step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, and electrostatic precipitator 1 removes
Most of dust in flue gas；Described desulfurized step refers to the flue gas after electrostatic precipitation step and the alkali in vertical shaft electric field 2
Liquid spraying mixing, grey particle trickle in flue gas and sulfur dioxide are in electric field force, the gathering of alkali liquor spraying, capture, coalescence effect
Under be gathered into little group and stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to the soot particle of residual after desulfurized step
The current being atomized device 4 formation rush to evaporation drying box 5, and buck is jointly evaporated by evaporation drying box 5 with the waste heat of flue gas
To final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
The present embodiment is a better embodiment, can be quickly by evaporation drying box clean cigarette out by air-introduced machine
Gas pumps out, and is sent to chimney and enters air, effectively prevents flue gas from returning and alters.
Embodiment 3
See Fig. 2, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include that evaporation is dried
Dry step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, and electrostatic precipitator 1 removes
Most of dust in flue gas；Described desulfurized step refers to the flue gas after electrostatic precipitation step and the alkali in vertical shaft electric field 2
Liquid spraying mixing, grey particle trickle in flue gas and sulfur dioxide are in electric field force, the gathering of alkali liquor spraying, capture, coalescence effect
Under be gathered into little group and stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to the soot particle of residual after desulfurized step
The current being atomized device 4 formation rush to evaporation drying box 5, and buck is jointly evaporated by evaporation drying box 5 with the waste heat of flue gas
To final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field 2 is by vertical shaft 6, conducting rod 7, the vertical shaft electrode 8 being positioned at vertical shaft 6 and the height being positioned at outside vertical shaft 6
Pressure electrostatic potential source 9 is constituted, and the positive pole of high-voltage electrostatic power 9 is connected with the outer wall of vertical shaft 6 by wire, and negative pole passes through conducting rod 7
It is connected with vertical shaft electrode 8.
Described vertical shaft electrode 8 is made up of corona discharge electrode 10 and the prickle wire 11 being distributed in around corona discharge electrode 10.
The present embodiment is another better embodiment, and vertical shaft electric field is by vertical shaft, conducting rod, the electrode being positioned at vertical shaft and position
High-voltage electrostatic power outside vertical shaft is constituted, and the positive pole of high-voltage electrostatic power is connected with the outer wall of vertical shaft by wire, and negative pole leads to
Cross conducting rod to be connected with electrode, use the vertical shaft electric field of this ad hoc structure, more uniform electric field can be formed in vertical shaft,
So that the trickle grey particle in flue gas accumulates on electrode in a large number, it is simple to improve postorder dust removing effects.Electrode by corona discharge electrode and
The prickle wire being distributed in around corona discharge electrode is constituted, and prickle wire electric discharge forms electric field, due to the polarity phase of Charged with corona discharge electrode
Instead, just Charged can be deposited on corona discharge electrode in corona zone and a part close near corona zone, thus reach good
Dedusting purpose.
Embodiment 4
See Fig. 2, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include that evaporation is dried
Dry step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, and electrostatic precipitator 1 removes
Most of dust in flue gas；Described desulfurized step refers to the flue gas after electrostatic precipitation step and the alkali in vertical shaft electric field 2
Liquid spraying mixing, grey particle trickle in flue gas and sulfur dioxide are in electric field force, the gathering of alkali liquor spraying, capture, coalescence effect
Under be gathered into little group and stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to the soot particle of residual after desulfurized step
The current being atomized device 4 formation rush to evaporation drying box 5, and buck is jointly evaporated by evaporation drying box 5 with the waste heat of flue gas
To final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field 2 is by vertical shaft 6, conducting rod 7, the vertical shaft electrode 8 being positioned at vertical shaft 6 and the height being positioned at outside vertical shaft 6
Pressure electrostatic potential source 9 is constituted, and the positive pole of high-voltage electrostatic power 9 is connected with the outer wall of vertical shaft 6 by wire, and negative pole passes through conducting rod 7
It is connected with vertical shaft electrode 8.
Described vertical shaft electrode 8 is made up of corona discharge electrode 10 and the prickle wire 11 being distributed in around corona discharge electrode 10.
The voltage of described high-voltage electrostatic power 9 is 20 kilovolts.
The spraying of described alkali liquor refers to that using aerosol apparatus 4 to be sprayed by the alkali liquor in alkali liquid tank 12 forms vaporific alkali liquor.
The pressure of described aerosol apparatus 4 is 2.2 MPas, the fountain height of alkali liquor be double centner/hour.
The present embodiment is another better embodiment, and the voltage of high-voltage electrostatic power is 20 kilovolts, and the pressure of aerosol apparatus 4 is
2.2 MPas, the fountain height of alkali liquor be double centner/hour, use specific atomisation pressure, it is possible to ensure that alkali liquor forms dispersion all
Even is vaporific, uses specific alkali liquor fountain height, both can guarantee that good desulfurized effect, can prevent again that alkali liquor excess from causing two
Secondary pollution.
Embodiment 5
See Fig. 2 and Fig. 3, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include steaming
Sending out baking step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, electrostatic precipitator 1
Remove the most of dust in flue gas；In described desulfurized step refers to the flue gas after electrostatic precipitation step and vertical shaft electric field 2
Alkali liquor spraying mixing, grey particle trickle in flue gas and sulfur dioxide are at electric field force, the gathering of alkali liquor spraying, capture, coalescence
It is gathered into little group under effect to stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to residual after desulfurized step
Soot particle is atomized the current of device 4 formation and rushes to evaporation drying box 5, and buck is jointly steamed by evaporation drying box 5 with the waste heat of flue gas
Dry obtain final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field 2 is by vertical shaft 6, conducting rod 7, the vertical shaft electrode 8 being positioned at vertical shaft 6 and the height being positioned at outside vertical shaft 6
Pressure electrostatic potential source 9 is constituted, and the positive pole of high-voltage electrostatic power 9 is connected with the outer wall of vertical shaft 6 by wire, and negative pole passes through conducting rod 7
It is connected with vertical shaft electrode 8.
Described vertical shaft electrode 8 is made up of corona discharge electrode 10 and the prickle wire 11 being distributed in around corona discharge electrode 10.
The voltage of described high-voltage electrostatic power 9 is 30 kilovolts.
The spraying of described alkali liquor refers to that using aerosol apparatus 4 to be sprayed by the alkali liquor in alkali liquid tank 12 forms vaporific alkali liquor.
The pressure of described aerosol apparatus 4 is 2.4 MPas, and the fountain height of alkali liquor is 150 kgs/hr.
Described aerosol apparatus 4 by the rotating disk 14 being enclosed within sparge pipe 13, drive the motor 15 that rotates of rotating disk 14 and connect
Shower nozzle 16 in rotating disk 14 is constituted, and shower nozzle 16 is connected with sparge pipe 13.
Described aerosol apparatus 4 is provided above the insulating frame 17 for fixing conducting rod 7, and insulating frame 17 is fixedly connected on vertical shaft
On the inwall of 6.
The present embodiment is another better embodiment, and aerosol apparatus is spiraled by the rotating disk being enclosed within sparge pipe, driving rotation
The motor and the connection shower nozzle on the rotating pan that turn are constituted, and shower nozzle is connected with sparge pipe, uses the aerosol apparatus of this ad hoc structure,
Shower nozzle can be freely rotatable, and the spraying enabling alkali liquor to be formed more is uniformly adhered on electrode, thus farthest
Sulfur dioxide in absorption flue gas, reaches good desulfurized effect.Aerosol apparatus is provided above the insulation for fixing conducting rod
Frame, insulating frame is fixedly connected on the inwall of vertical shaft, and conducting rod can be played good support, firm effect by insulating frame, anti-
Only conducting rod shakes.
Embodiment 6
See Fig. 4 and Fig. 5, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include steaming
Sending out baking step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, electrostatic precipitator 1
Remove the most of dust in flue gas；In described desulfurized step refers to the flue gas after electrostatic precipitation step and vertical shaft electric field 2
Alkali liquor spraying mixing, grey particle trickle in flue gas and sulfur dioxide are at electric field force, the gathering of alkali liquor spraying, capture, coalescence
It is gathered into little group under effect to stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to residual after desulfurized step
Soot particle is atomized the current of device 4 formation and rushes to evaporation drying box 5, and buck is jointly steamed by evaporation drying box 5 with the waste heat of flue gas
Dry obtain final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field 2 is by vertical shaft 6, conducting rod 7, the vertical shaft electrode 8 being positioned at vertical shaft 6 and the height being positioned at outside vertical shaft 6
Pressure electrostatic potential source 9 is constituted, and the positive pole of high-voltage electrostatic power 9 is connected with the outer wall of vertical shaft 6 by wire, and negative pole passes through conducting rod 7
It is connected with vertical shaft electrode 8.
Described vertical shaft electrode 8 is made up of corona discharge electrode 10 and the prickle wire 11 being distributed in around corona discharge electrode 10.
The voltage of described high-voltage electrostatic power 9 is 50 kilovolts.
The spraying of described alkali liquor refers to that using aerosol apparatus 4 to be sprayed by the alkali liquor in alkali liquid tank 12 forms vaporific alkali liquor.
The pressure of described aerosol apparatus 4 is 2.5 MPas, and the fountain height of alkali liquor is 200 kgs/hr.
Described aerosol apparatus 4 by the rotating disk 14 being enclosed within sparge pipe 13, drive the motor 15 that rotates of rotating disk 14 and connect
Shower nozzle 16 in rotating disk 14 is constituted, and shower nozzle 16 is connected with sparge pipe 13.
Described aerosol apparatus 4 is provided above the insulating frame 17 for fixing conducting rod 7, and insulating frame 17 is fixedly connected on vertical shaft
On the inwall of 6.
Described insulating frame 17 be provided above porous homogenizing plate 18, porous homogenizing plate 18 is slidably connected at the interior of vertical shaft 6
On wall.
Described shower nozzle 16 is made up of sprinkler body and the many venturi jet pipes 19 being embedded on sprinkler body, many venturi jet pipes
19 are evenly arranged on sprinkler body.
The present embodiment is another better embodiment, insulating frame be provided above porous homogenizing plate, porous homogenizing plate is sliding
It is automatically connected on the inwall of vertical shaft, flue gas can be played guiding peptizaiton by porous homogenizing plate, prevent flue gas local poly-
Collection, so that the electrode in vertical shaft electric field more uniformly can comprehensively adsorb the trickle grey particle in flue gas, improves further
Flue gas ash removal effect.Shower nozzle is made up of sprinkler body and the many venturi jet pipes being embedded on sprinkler body, and many venturi jet pipes are equal
Even being arranged on sprinkler body, use venturi jet pipe, the alkali liquor in sparge pipe forms an acceleration by venturi jet pipe,
Alkali liquor after ejection is more readily formed vaporific, so that alkali liquor can fully react with the sulfur dioxide in flue gas, enters one
Step improves flue gas desulfurization effect.
Embodiment 7
See Fig. 5 and Fig. 6, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include steaming
Sending out baking step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, electrostatic precipitator 1
Remove the most of dust in flue gas；In described desulfurized step refers to the flue gas after electrostatic precipitation step and vertical shaft electric field 2
Alkali liquor spraying mixing, grey particle trickle in flue gas and sulfur dioxide are at electric field force, the gathering of alkali liquor spraying, capture, coalescence
It is gathered into little group under effect to stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to residual after desulfurized step
Soot particle is atomized the current of device 4 formation and rushes to evaporation drying box 5, and buck is jointly steamed by evaporation drying box 5 with the waste heat of flue gas
Dry obtain final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field 2 is by vertical shaft 6, conducting rod 7, the vertical shaft electrode 8 being positioned at vertical shaft 6 and the height being positioned at outside vertical shaft 6
Pressure electrostatic potential source 9 is constituted, and the positive pole of high-voltage electrostatic power 9 is connected with the outer wall of vertical shaft 6 by wire, and negative pole passes through conducting rod 7
It is connected with vertical shaft electrode 8.
Described vertical shaft electrode 8 is made up of corona discharge electrode 10 and the prickle wire 11 being distributed in around corona discharge electrode 10.
The voltage of described high-voltage electrostatic power 9 is 55 kilovolts.
The spraying of described alkali liquor refers to that using aerosol apparatus 4 to be sprayed by the alkali liquor in alkali liquid tank 12 forms vaporific alkali liquor.
The pressure of described aerosol apparatus 4 is 2.6 MPas, and the fountain height of alkali liquor is 230 kgs/hr.
Described aerosol apparatus 4 by the rotating disk 14 being enclosed within sparge pipe 13, drive the motor 15 that rotates of rotating disk 14 and connect
Shower nozzle 16 in rotating disk 14 is constituted, and shower nozzle 16 is connected with sparge pipe 13.
Described aerosol apparatus 4 is provided above the insulating frame 17 for fixing conducting rod 7, and insulating frame 17 is fixedly connected on vertical shaft
On the inwall of 6.
Described insulating frame 17 be provided above porous homogenizing plate 18, porous homogenizing plate 18 is slidably connected at the interior of vertical shaft 6
On wall.
Described shower nozzle 16 is made up of sprinkler body and the many venturi jet pipes 19 being embedded on sprinkler body, many venturi jet pipes
19 are evenly arranged on sprinkler body.
The bottom of described alkali liquid tank 12 connects tee T 20, and tee T 20 connects three sparge pipes 13, three sprays
Being respectively connected with an aerosol apparatus 4 on liquid pipe 13, three aerosol apparatus 4 are triangularly arranged in vertical shaft 6.
The present embodiment is another better embodiment, and the bottom of alkali liquid tank connects tee T, and tee T connects three
Root sparge pipe, three sparge pipes are respectively connected with an aerosol apparatus, and three aerosol apparatus are triangularly arranged in vertical shaft, each
Aerosol apparatus can rotate freely, spatially can be formed multi-angle spraying, the maximized sulfur dioxide made in flue gas with
Alkali liquor reacts, and greatly improves flue gas desulfurization effect.
Embodiment 8
See Fig. 5-Fig. 7, a kind of purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, also include steaming
Sending out baking step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator 1, electrostatic precipitator 1
Remove the most of dust in flue gas；In described desulfurized step refers to the flue gas after electrostatic precipitation step and vertical shaft electric field 2
Alkali liquor spraying mixing, grey particle trickle in flue gas and sulfur dioxide are at electric field force, the gathering of alkali liquor spraying, capture, coalescence
It is gathered into little group under effect to stick on the electrode 3 of vertical shaft electric field 2；Described evaporation baking step refers to residual after desulfurized step
Soot particle is atomized the current of device 4 formation and rushes to evaporation drying box 5, and buck is jointly steamed by evaporation drying box 5 with the waste heat of flue gas
Dry obtain final clean flue gas.
Also including that flue gas draws step, described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is by air-introduced machine
Suction is sent to chimney and is entered air.
Described vertical shaft electric field 2 is by vertical shaft 6, conducting rod 7, the vertical shaft electrode 8 being positioned at vertical shaft 6 and the height being positioned at outside vertical shaft 6
Pressure electrostatic potential source 9 is constituted, and the positive pole of high-voltage electrostatic power 9 is connected with the outer wall of vertical shaft 6 by wire, and negative pole passes through conducting rod 7
It is connected with vertical shaft electrode 8.
Described vertical shaft electrode 8 is made up of corona discharge electrode 10 and the prickle wire 11 being distributed in around corona discharge electrode 10.
The voltage of described high-voltage electrostatic power 9 is 60 kilovolts.
The spraying of described alkali liquor refers to that using aerosol apparatus 4 to be sprayed by the alkali liquor in alkali liquid tank 12 forms vaporific alkali liquor.
The pressure of described aerosol apparatus 4 is 2.8 MPas, and the fountain height of alkali liquor is 300 kgs/hr.
Described aerosol apparatus 4 by the rotating disk 14 being enclosed within sparge pipe 13, drive the motor 15 that rotates of rotating disk 14 and connect
Shower nozzle 16 in rotating disk 14 is constituted, and shower nozzle 16 is connected with sparge pipe 13.
Described aerosol apparatus 4 is provided above the insulating frame 17 for fixing conducting rod 7, and insulating frame 17 is fixedly connected on vertical shaft
On the inwall of 6.
Described insulating frame 17 be provided above porous homogenizing plate 18, porous homogenizing plate 18 is slidably connected at the interior of vertical shaft 6
On wall.
Described shower nozzle 16 is made up of sprinkler body and the many venturi jet pipes 19 being embedded on sprinkler body, many venturi jet pipes
19 are evenly arranged on sprinkler body.
The bottom of described alkali liquid tank 12 connects tee T 20, and tee T 20 connects three sparge pipes 13, three sprays
Being respectively connected with an aerosol apparatus 4 on liquid pipe 13, three aerosol apparatus 4 are triangularly arranged in vertical shaft 6.
Heater 22 that described evaporation drying box 5 by casing 21, is fixed in casing 21 and being slidably connected in casing 21
Supporting plate 23 on wall is constituted, and the sidewall of casing 21 is run through in one end of supporting plate 23.
Temperature in described evaporation drying box 5 is 130-150 degree Celsius.
The present embodiment is preferred forms, by the flue gas after electrostatic precipitation step and the alkali liquor spray in vertical shaft electric field
Mist mixes, and grey particle trickle in flue gas and sulfur dioxide just can be in electric field force, the gathering of alkali liquor spraying, capture, coalescence effects
Under be gathered into little group and stick on the electrode of vertical shaft electric field；By evaporation baking step, it is possible to make the little group being gathered on electrode connect
The current formed with alkali liquor rush in the lump to evaporation drying box, and buck is jointly evaporated by evaporation drying box with the waste heat of flue gas, with
Time purify the clean flue gas that obtains and be dried by evaporation case and discharge, use vertical shaft electric field the method coordinating alkali liquor to spray, it is possible to make
Trickle grey particle in flue gas with atomization after alkali liquor be sufficiently mixed, slough the sulfur dioxide in flue gas；Through evaporation baking step
After ash, aqueous mixtures can discharge again in time, it is possible to effectively prevent secondarily polluted water；Whole technical scheme has reached good cigarette
Gas clean-up effect.Heater that evaporation drying box by casing, is fixed in casing and the supporting plate being slidably connected on cabinet wall
Constituting, the sidewall of casing is run through in one end of supporting plate, and heater coordinates the waste heat of flue gas, it is possible to ash, aqueous mixtures are steamed rapidly
Dry, and just can remove the dust after being evaporated in time by pull-out supporting plate.Temperature in evaporation drying box is 130-150 degree Celsius,
Use this specific temperature, coordinate flue gas own temperature that ash, aqueous mixtures just can be made to be evaporated rapidly, it is not necessary to too much to assist
Heating, effectively save energy consumption.
Claims (14)
1. a purifying method for boiler fume, including electrostatic precipitation step and desulfurized step, it is characterised in that: also include that evaporation is dried
Dry step, described electrostatic precipitation step refers to the flue gas in boiler flue is introduced electrostatic precipitator (1), electrostatic precipitator (1)
Remove the most of dust in flue gas；Described desulfurized step refers to the flue gas after electrostatic precipitation step and vertical shaft electric field (2)
In alkali liquor spraying mixing, gathering that grey particle trickle in flue gas and sulfur dioxide are sprayed at electric field force and alkali liquor, capture, solidifying
And be gathered into little group and stick on the electrode (3) of vertical shaft electric field (2) under acting on；Described evaporation baking step refers to through desulfurized step
After, it is gathered into little group and sticks the soot particle on the electrode (3) of vertical shaft electric field (2) to be atomized the current punching that device (4) formed dry to evaporation
In dry case (5), buck is evaporated and obtains final clean flue gas by the waste heat of evaporation drying box (5) and flue gas jointly.
A kind of purifying method for boiler fume the most according to claim 1, it is characterised in that: also include that flue gas draws step,
Described flue gas is drawn step and is referred to that the flue gas after evaporation baking step is sent to chimney by induced draft blower withdraws and enters air.
A kind of purifying method for boiler fume the most according to claim 1, it is characterised in that: described vertical shaft electric field (2) is by erecting
Well (6), conducting rod (7), it is positioned at the vertical shaft electrode (8) of vertical shaft (6) and is positioned at vertical shaft (6) high-voltage electrostatic power (9) structure outward
Becoming, the positive pole of high-voltage electrostatic power (9) is connected with the outer wall of vertical shaft (6) by wire, and negative pole is by conducting rod (7) and vertical shaft electricity
Pole (8) connects.
A kind of purifying method for boiler fume the most according to claim 3, it is characterised in that: described vertical shaft electrode (8) is by electricity
Dizzy pole (10) and the prickle wire (11) being distributed in around corona discharge electrode (10) are constituted.
A kind of purifying method for boiler fume the most according to claim 3, it is characterised in that: described high-voltage electrostatic power (9)
Voltage be 20-60 kilovolt continuously adjustabe.
A kind of purifying method for boiler fume the most according to claim 1, it is characterised in that: the spraying of described alkali liquor refers to use
Alkali liquor in alkali liquid tank (12) is sprayed and forms vaporific alkali liquor by aerosol apparatus (4).
A kind of purifying method for boiler fume, it is characterised in that: the pressure of described aerosol apparatus (4)
Power is 2.2-2.8 MPa, and the fountain height of alkali liquor is 100-300 kg/hr.
A kind of purifying method for boiler fume the most according to claim 6, it is characterised in that: described aerosol apparatus (4) is by being enclosed within
Rotating disk (14) on sparge pipe (13), drive the motor (15) that rotating disk (14) rotates and the spray being connected in rotating disk (14)
Head (16) is constituted, and shower nozzle (16) is connected with sparge pipe (13).
A kind of purifying method for boiler fume the most according to claim 8, it is characterised in that: described aerosol apparatus (4) top sets
Being equipped with the insulating frame (17) for fixing conducting rod (7), insulating frame (17) is fixedly connected on the inwall of vertical shaft (6).
A kind of purifying method for boiler fume the most according to claim 9, it is characterised in that: described insulating frame (17) upper
Side is provided with porous homogenizing plate (18), and porous homogenizing plate (18) is slidably connected on the inwall of vertical shaft (6).
11. a kind of purifying method for boiler fume according to claim 10, it is characterised in that: described shower nozzle (16) is by sprinkler body
Constituting with the many venturi jet pipes (19) being embedded on sprinkler body, many venturi jet pipes (19) are evenly arranged on sprinkler body.
12. a kind of purifying method for boiler fume according to claim 11, it is characterised in that: the end of described alkali liquid tank (12)
Portion connects tee T (20), and the upper connection of tee T (20) has three sparge pipes (13), and three sparge pipes (13) are respectively connected with
One aerosol apparatus (4), three aerosol apparatus (4) are triangularly arranged in vertical shaft (6).
13. a kind of purifying method for boiler fume according to claim 12, it is characterised in that: described evaporation drying box (5)
The heater (22) by casing (21), being fixed in casing (21) and supporting plate (23) structure being slidably connected on casing (21) inwall
Becoming, the sidewall of casing (21) is run through in one end of supporting plate (23).
14. a kind of purifying method for boiler fume according to claim 13, it is characterised in that: described evaporation drying box (5)
Interior temperature is 130-150 degree Celsius.
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| CN108079714A (en) * | 2017-12-06 | 2018-05-29 | 宁波市江北义盈工贸有限公司 | A kind of boiler dust-extraction unit |
| CN110721582A (en) * | 2019-09-17 | 2020-01-24 | 上海蓝魂环保科技有限公司 | Desulfurizing tower for seawater desulfurization of ships |
| CN113477011B (en) * | 2021-07-26 | 2022-05-20 | 塔里木大学 | Dust device for environmental protection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588569A (en) * | 1985-02-21 | 1986-05-13 | Intermountain Research & Development Corporation | Dry injection flue gas desulfurization process using absorptive soda ash sorbent |
| EP0461695B1 (en) * | 1990-06-09 | 1995-02-15 | METALLGESELLSCHAFT Aktiengesellschaft | Process and apparatus for cleaning dust-laden and noxious exhaust gases |
| CN2440585Y (en) * | 2000-07-17 | 2001-08-01 | 翟松森 | Electrostatic desulfurized dust collector in front of shaft well |
| CN2506349Y (en) * | 2001-08-27 | 2002-08-21 | 兰州电力修造厂 | Pre-flue humidifier for electric dust remover |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090025A (en) * | 1983-10-21 | 1985-05-21 | Sumitomo Heavy Ind Ltd | Spray dryer type waste gas treating method |
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2015
- 2015-05-22 CN CN201510263605.4A patent/CN105013275B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588569A (en) * | 1985-02-21 | 1986-05-13 | Intermountain Research & Development Corporation | Dry injection flue gas desulfurization process using absorptive soda ash sorbent |
| EP0461695B1 (en) * | 1990-06-09 | 1995-02-15 | METALLGESELLSCHAFT Aktiengesellschaft | Process and apparatus for cleaning dust-laden and noxious exhaust gases |
| CN2440585Y (en) * | 2000-07-17 | 2001-08-01 | 翟松森 | Electrostatic desulfurized dust collector in front of shaft well |
| CN2506349Y (en) * | 2001-08-27 | 2002-08-21 | 兰州电力修造厂 | Pre-flue humidifier for electric dust remover |
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