CN101062462A - Liquid holding bath side-placed smoke gas desulfurization unit - Google Patents
Liquid holding bath side-placed smoke gas desulfurization unit Download PDFInfo
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- CN101062462A CN101062462A CN 200610046442 CN200610046442A CN101062462A CN 101062462 A CN101062462 A CN 101062462A CN 200610046442 CN200610046442 CN 200610046442 CN 200610046442 A CN200610046442 A CN 200610046442A CN 101062462 A CN101062462 A CN 101062462A
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Abstract
The invention relates to a liquid holdup side set flue gas desulfurization device made of gas desulfurization and side holding liquid slot. The smoke going into the bottom of the desulfurization section, contact with the top spraying absorption counter current to be removed by SO2 in the smoke, absorption liquid falling to the bottom of the desulfruization flowing back to the liquid holdup slot without liquid storing at the bottom, installing mixer on the top of the liquid holding slot, preventing the deposit of floating grains, blowing into oxidization air from the liquid holdup slot, with the oxidized gas emitted together with the purified smoke. The space right under the smoke desulfurization section is the circulating pump house.
Description
Technical field
The present invention relates to a kind of flue gas desulfur device, is the flue gas desulfur device of desulfurizing agent with lime, agstone, light-magnesite powder, mineral powder of magnesite particularly.
Background technology
Lime, agstone, light-magnesite powder, mineral powder of magnesite are the main desulfurizing agent, particularly lime of flue gas desulfurization and agstone because with low cost and often use as fume desulfurizing agent.Flue gas desulfurization device generally adopts the flue gas spray absorber, absorption tower schematic diagram as " coal-fired flue gas desulfurization and denitration technology and case history " that in April, 2002, Chemical Industry Press published the 70th page～76 pages, the top on absorption tower is the desulfurization section that flue gas contacts with absorption liquid, the bottom on absorption tower is to hold liquid bath, absorption liquid is extracted out the spray connection pipe that is transported to top, absorption tower with pump, by sprays such as atomizers, absorb SO in the flue gas
2Absorption liquid fall back to holding liquid bath.Because above-mentioned absorbent and product all are water-soluble very low materials, so must prevent that the solid particulate matter in the absorption liquid from precipitating by continuous stirring, the general mode that the liquid bath sidewall is installed agitator of holding that adopts of the alr mode on this type of absorption tower stirs also to make and blasts the oxidation air of holding in the liquid bath and better disperse.
Above-mentioned gas-liquid contacts the flue gas desulfurization section and holds the absorption tower that liquid bath builds up an integral body, following deficiency is arranged: (1) is limited by flue gas desulfurization section sectional area, holding the liquid bath sectional area can not be too big, therefore, for guaranteeing that the gas-liquid contact is good and the bigger liquid bath volume of holding being arranged, the absorption tower is very high, and this makes absorption tower unit volume cost higher, and the absorption liquid transmitting power is bigger; (2) be subjected to flue gas desulfurization section size restrictions, holding the liquid bath volume should not be too big, therefore, the absorption liquid time of staying is short, this just requires to use the less desulfurizing agent of particle diameter to keep absorption liquid to reach certain pH value to guarantee desulfurizing agent dissolving in time, and the less desulfurizing agent of particle diameter means higher reagent expense; (3) need hold a plurality of special-purpose agitators of installation on the liquid bath sidewall, the cost height, difficult maintenance, agitator main shaft and the sealing difficulty of holding between the liquid bath wall are big; (4) owing to hold liquid bath and the flue gas desulfurization section is an integral body, hold have absorption liquid to extract pipeline out on the liquid bath sidewall, replenish the absorption liquid pipeline, support that oxidation air pipeline, agitator main shaft pass sidewall and connecting elements etc., therefore, hold liquid bath and be suitable for adopting metal material, and the metal material long period of soaking is in the absorption liquid of slant acidity, and anticorrosion difficulty is big.
CN2689071Y discloses a kind of fume desulfurizing tower, comprise an outer cylinder body and be installed in the interior reactor of outer cylinder body, the barrel of outer cylinder body and reactor is a multi-layer compound structure, the skin that is the barrel of outer cylinder body and reactor is the layer of metal parent terrain, scribble one deck anticorrosive paint layer in the inboard of metallic matrix layer, be bonded with the frp layer that one deck is made by the thermoset frp material in the inboard of anticorrosive paint layer.CN2668235Y discloses a kind of High Air Speed Flue Gas Thionizer, the body of the tower that comprises a tubular, in body of the tower lower end and upper end air inlet and gas outlet are arranged respectively, the body of the tower inner chamber is divided into multistage flue gas processing section from the bottom to top, the top of each grade flue gas processing section is provided with a liquid spraying device, be provided with the gas distributor that can make the flue gas dispersion of passing through between each grade flue gas processing section and the back one-level flue gas processing section, in the end also be provided with the demister that a usefulness removes water smoke between one-level flue gas processing section and the gas outlet.CN2569892Y discloses a kind of fume desulfurizing tower, and the demister that at least one block of indention shape flap is set is connected with housing, and the pipeline that is connected with housing is installed in the bottom of demister, and the single hole spiral nozzle is connected with pipeline.CN1593725A discloses a kind of fume desulfurizing tower, is provided with gas is carried out the uniform honeycomb filler of water conservancy diversion in the gas approach district; Arrange nozzle in circulation shower nozzle district, nozzle adopts double-deck the layout, is 30 °～80 ° with two adjacent in one deck nozzle angulation α.Above-mentioned technology is anticorrosion from the flue gas desulfurization tower body, dwindle the reaction tower size, reduce flue gas with water, improve aspects such as gas liquid contacting efficiency has proposed new technical scheme, but all unresolved the problems referred to above.
Summary of the invention
At the deficiencies in the prior art, the present invention designs a kind of flue gas desulfur device, can reduce the desulfurizer height, avoid sealing problem that agitator brings being installed, reducing apparatus cost, reducing the reagent expense, being reduced anticorrosion difficulty from holding the liquid bath sidewall.
The present invention draws following research conclusion by the flue gas desulphurization system that uses the low aqueous solubility desulfurizing agent is fully studied:
(1) because the solubility of desulfurizing agent itself and product is lower, have a large amount of solid particulate matters in the reaction system, the density of these solids very easily deposits much larger than water, so the liquid bath of holding of desulfurizing tower needs sufficient stirring operation.
(2) flue gas and desulfurization absorption liquid in the contact process, are not as this area knowledge understanding in desulfurizing tower, have finished SO
2Neutralization reaction with the desulfurization absorption liquid.Find in desulfurizing tower, during contact process, small part SO is only arranged at desulfurization absorption liquid and flue gas by further investigation
2With the desulfurizing agent that dissolves in the desulfurization absorption liquid neutralization reaction has taken place, the most of SO in the flue gas
2Just be dissolved in the absorption liquid, and do not finish neutralization reaction with desulfurizing agent, main cause is that the solubility of desulfurizing agent is lower, and the desulfurization dosage that can react in the absorption liquid is less.Be dissolved in the SO in the absorption liquid
2Need the long time with the complete neutralization reaction of desulfurizing agent, promptly desulfurizing agent is in the dissolving of aqueous phase, and---reaction consumes is SO to reaction consumes---dissolving again---again
2With the process of the complete neutralization reaction of desulfurizing agent, the time that this process need is long.In desulfurizing tower, performance be that the neutralization reaction major part occurs in and finishes after flue gas and desulfurization absorption liquid disengage, mainly be in holding liquid bath, to finish, rather than finish at bubbling area.
(3) from the above mentioned, owing to recognize that the gas-liquid contact process mainly is SO in the fume desulfurizing tower
2Be dissolved in the process of absorption liquid, and be not in this process, to have carried out sufficient neutralization reaction.Therefore, the pH value of desulfurization absorption liquid is not need be very high, dissolving SO
2The pH value of back absorption liquid can show as acidity, and acid absorption liquid is circulated to when holding liquid bath, more helps the dissolving of desulfurizing agent, and then improves the utilization rate of desulfurizing agent.
According to above result of study, the present invention proposes to comprise following fume desulfurizer:
Flue gas desulfur device comprises bubbling area, stirs neutralization and holds liquid bath, and the absorption liquid cycle facilities.Wherein bubbling area is set to various desulfurization tower structures, stirs neutralization and holds liquid bath and be arranged on the side-lower of desulfurizing tower and communicate with desulfurizing tower, absorbs SO in desulfurizing tower
2After absorption liquid can go into stir neutralization by flow by gravity and hold liquid bath.
The absorption liquid cycle facilities comprises circulating pump and respective lines, and circulating pump can be arranged on the desulfurizing tower below.Smoke inlet can be arranged on the desulfurizing tower bottom, also can be arranged on to stir neutralization and hold liquid bath top, but preferably the former.Purify the back exhanst gas outlet and be arranged on desulfurizing tower top.Desulfurizing tower can adopt this area conventional structure, as core structure, in the desulfurizing tower suitable filler can be set, and also can be the hollow-spraying-tower structure, also can be the desulfurizing tower structure that suitable inner member is set.It is the suitable structure of container of shape that liquid bath is held in the stirring neutralization.Lower sidewall is provided with material outlet, is used to discharge solid and liquid material.The sidewall middle and upper part is provided with circulation imbibition outlet, communicates with pump entry.Side wall upper part or top can be provided with the additional inlet of materials such as desulfurizing agent.The interior bottom of liquid bath is held in the stirring neutralization can be provided with gas distribution pipe, is used for replenishing oxygen-containing gas with the oxidation neutralization reaction product.Mixing plant is the blade construction that is provided with on the shaft, shaft level or vertical the setting, and when shaft vertically was provided with, shaft was held the liquid bath top from the stirring neutralization and is connected with power-equipment.When shaft is horizontally disposed with, shaft is held the liquid bath sidewall from the stirring neutralization and is connected with power-equipment, and the position of shaft is higher than, and stirring neutralizes holds liquid level in the liquid bath, to reduce corrosion, need be provided with larger-size board-like blade this moment, make blade at least a portion can immerse the stirring neutralization and hold below the liquid bath liquid level, produce effective mixing effect.Stirring neutralizes to hold in the liquid bath can be provided with an amount of division board, forms cingulum sulcus shape and holds liquid bath, to strengthen the neutralization reaction effect.
Compare with existing flue gas desulfur device, the present invention has following advantage:
(1) hold the liquid bath volume and not limited by desulfurizing tower, desulfurizing tower can reduce height, saves equipment investment.Suitably increase the volume of holding liquid bath and can improve the neutralization reaction time of staying, improve the utilization rate of desulfurizing agent, reduce the discharge capacity of solid waste.
(2) main shaft of mixing plant connects with external impetus equipment by the sidewall that stirs neutralization and hold the liquid bath top or be higher than liquid level, and the etching problem of movable sealing place can effectively solve.Movable sealing is under the long-time soaking state of corrosive solution in the prior art, and its anticorrosion problem is difficult to effective solution.The structure of apparatus of the present invention can effectively address this problem.
Description of drawings
Fig. 1 flue gas desulfur device side-looking of the present invention structural representation.
Fig. 2 is that cingulum sulcus shape of the present invention is held liquid bath plan structure schematic diagram.
Fig. 3 is a kind of main shaft agitator arm structural representation parallel with liquid level that uses on the cingulum sulcus of the present invention.
The specific embodiment
Further specify the structure and the technique effect of apparatus of the present invention below in conjunction with accompanying drawing.
Liquid holding bath side-placed smoke gas desulfurization unit of the present invention comprises following content (seeing accompanying drawing 1):
(1) flue gas desulfurization section (being bubbling area);
(2) flue gas desulfurization section side-lower hold liquid bath (being the neutralization reaction district);
(3) recirculation pump house under the flue gas desulfurization section.
Wherein, the flue gas desulfurization section is installed on the platform that concrete constructs, and the flue gas desulfurization section can be selected anti-corrosion concrete or anticorrosion masonry structure for use, also can adopt stainless steel or add other metal material of corrosion protective lining (for example rubber lining), preferred non-corrosive metal (NCM) material.In the flue gas desulfurization section, one or more layers spray connection pipe is installed on top, and every layer of spray connection pipe installed a plurality of atomizers; If one deck spray connection pipe can load fillers such as grid in desulfurization section.Atomizer can be selected traditional hollow cone tangent type, solid-cone tangent type, screw type etc. for use.On spray connection pipe top demister is installed, demister can be selected deflection plate demister or eddy flow plate demister for use.Flue gas desulfurization section bottom is an inclined design, is easy to absorption liquid from the liquid bath of holding that flows into side-lower, does not have liquid to remain in the bottom.In the flue gas desulfurization section, flue gas and absorption liquid counter current contacting are finished flue gas desulfurization course.
Hold liquid bath and be positioned at flue gas desulfurization section side-lower, therefore its sectional area, reaches same or bigger volume generally greater than flue gas desulfurization section sectional area, and it is less to hold the liquid bath height, holds liquid bath and adds that the total height of flue gas desulfurization section is less.Hold liquid bath and can select metal structure for use, also can adopt concrete or anticorrosion masonry structure, preferred concrete or anticorrosion masonry structure, anticorrosion metope can adopt granite, acid-resistant porcelain etc.Holding liquid bath can be cylindrical shape, square pond shape, cingulum sulcus shape (as accompanying drawing 2), and holding the liquid bath top has seal cover board, and seal cover board can be the acid-resistant cement plate, also can be on the concrete brace summer anticorrosion cover plate such as installing engineering plastics; Agitator is installed from holding liquid bath top, and agitator can be one or more.Can select common agitator for use.The agitator main shaft can be perpendicular to liquid level, also can be parallel with liquid level.Cylindrical shape, square pond shape are held the preferred main shaft of the liquid bath agitator vertical with liquid level, and agitator motor is installed in holds on the liquid bath cover plate.Cingulum sulcus shape is held liquid bath can be designed to enter the mouth height, the low form of outlet and is promoted to flow, also can be by the width control absorption liquid flow velocity of ditch, as far as possible without agitator, when needing agitator really, the agitator main shaft can be vertical with liquid level, also can be parallel with liquid level.When selecting a kind of agitator in back for use, the agitator main shaft should be higher than liquid level, and agitator arm (leaf wing) immerses the degree of depth of absorption liquid less than its radius, and fetching water by the agitator arm rotation promotes absorption liquid mobile (as accompanying drawing 3).Agitator main shaft, impeller or stirring wing should be selected anticorrosion material or anticorrosive coat for use, for example pottery, enamel, plastics, carborundum, rubber etc.Hold the liquid bath bottom dendritic gas distribution pipe is installed, a plurality of air distribution heads are installed on the gas distribution pipe.
The material that liquid bath is held in turnover has: the absorption liquid from the gravity flow of flue gas desulfurization section enters, remove the absorption liquid of flue gas desulfurization with the pump extraction, and discharge and hold the absorption liquid that liquid bath goes Separation of Solid and Liquid and does further processing, to holding absorption (slurry) liquid that liquid bath replenishes; From holding the oxidation air that the liquid bath bottom blasts, the gas after the oxidation goes the flue gas desulfurization section with fume emission.
Use as absorption liquid circulating pump pump house in space under the flue gas desulfurization section, does not need to build in addition pump house.
The present invention will hold the side-lower that liquid bath is arranged in the flue gas desulfurization section, hold the liquid bath size and be not subjected to flue gas desulfurization section size restrictions, its sectional area can be many greater than flue gas desulfurization section sectional area, reduced the total height of flue gas desulfur device, also reduced absorption liquid circulation pump lift, the power consumption of minimizing.Hold liquid bath and be arranged in flue gas desulfurization section next door, agitator can be installed at an upper portion thereof, needn't be installed on the sidewall, therefore, reduced the manufacturing and the installation difficulty of agitator; The agitator main shaft needn't pass sidewall, therefore, does not have the sealing problem between main shaft and the sidewall; The liquid bath side-wall hole is few holding, and is easily anticorrosion.When holding the design of liquid bath employing cingulum sulcus, can obviously reduce the power consumption of agitator.
Claims (7)
1, a kind of liquid holding bath side-placed smoke gas desulfurization unit comprises bubbling area, stir neutralization and hold liquid bath, and the absorption liquid cycle facilities; It is characterized in that bubbling area is the desulfurization tower structure, stir neutralization and hold liquid bath and be arranged on the side-lower of desulfurizing tower and communicate, in desulfurizing tower, absorb SO with desulfurizing tower
2After absorption liquid go into to stir neutralization by flow by gravity and hold liquid bath; The absorption liquid cycle facilities comprises circulating pump and respective lines, and circulating pump is arranged on the desulfurizing tower below.
2, according to the described device of claim 1, it is characterized in that smoke inlet is arranged on the desulfurizing tower bottom, perhaps be arranged on the stirring neutralization and hold liquid bath top, purify the back exhanst gas outlet and be arranged on desulfurizing tower top.
3, according to the described device of claim 1, it is characterized in that being provided with in the described desulfurizing tower suitable filler, be the hollow-spraying-tower structure perhaps, or the desulfurizing tower structure of suitable inner member is set.
4, according to the described device of claim 1, it is characterized in that described stirring neutralization holds the liquid bath lower sidewall material outlet is set, be used to discharge solid and liquid material; The sidewall middle and upper part is provided with circulation imbibition outlet, communicates with pump entry; Side wall upper part or top are provided with the additional inlet of materials such as desulfurizing agent; The stirring neutralization is held the interior bottom of liquid bath gas distribution pipe is set, and is used for replenishing oxygen-containing gas with the oxidation neutralization reaction product.
5, according to the described device of claim 1, it is characterized in that stirring neutralization and hold liquid bath mixing plant is set, mixing plant is the blade construction that is provided with on the shaft, shaft level or vertical the setting, when shaft vertically was provided with, shaft was held the liquid bath top from the stirring neutralization and is connected with power-equipment; When shaft was horizontally disposed with, shaft was held the liquid bath sidewall from the stirring neutralization and is connected with power-equipment, and the position of shaft is higher than, and stirring neutralizes holds liquid level in the liquid bath.
6, according to the described device of claim 1, it is characterized in that it can be cylindrical shape, square pond shape or cingulum sulcus shape that liquid bath is held in described stirring, holding the liquid bath top has seal cover board.
7,, it is characterized in that cingulum sulcus shape is stirred to hold liquid bath be designed to enter the mouth height, the low form of outlet and promote to flow according to the described device of claim 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100464425A CN100488602C (en) | 2006-04-25 | 2006-04-25 | Liquid holding bath side-placed smoke gas desulfurization unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100464425A CN100488602C (en) | 2006-04-25 | 2006-04-25 | Liquid holding bath side-placed smoke gas desulfurization unit |
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| CN101062462A true CN101062462A (en) | 2007-10-31 |
| CN100488602C CN100488602C (en) | 2009-05-20 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104109898A (en) * | 2014-07-08 | 2014-10-22 | 德清县浙北通讯器材有限公司 | Waste gas treatment device of pickling or electroplating equipment |
| CN104208996A (en) * | 2014-06-16 | 2014-12-17 | 中电投远达环保工程有限公司 | Desulfurizing and dedusting apparatus |
| CN105392547A (en) * | 2013-05-03 | 2016-03-09 | 氟石科技公司 | Systems and methods for multi-celled gas processing |
| CN106823694A (en) * | 2017-03-31 | 2017-06-13 | 中科华瑞（北京）汽车环保科技有限公司 | A kind of pollutant handling arrangement and a kind of in-car gas purifying equipment |
| CN107224851A (en) * | 2017-07-14 | 2017-10-03 | 广东新派建材有限公司 | A kind of novel desulphurization method |
| CN107349775A (en) * | 2017-08-22 | 2017-11-17 | 吉林工业职业技术学院 | For carrying out the wet type unit and method of desulfurizing and purifying to calcining carbon flue gas |
| CN107998863A (en) * | 2017-11-28 | 2018-05-08 | 江苏民生重工有限公司 | A kind of efficient oxidation wet desulphurization device |
| US9975083B2 (en) | 2013-05-03 | 2018-05-22 | Fluor Technologies Corporation | Systems and methods for multi-celled gas processing |
| CN108310950A (en) * | 2018-04-10 | 2018-07-24 | 李威 | The device of processing is absorbed for industrial waste gas |
| CN108607344A (en) * | 2018-05-23 | 2018-10-02 | 绍兴市鼎泰节能环保科技有限公司 | A kind of chloride containing work waste gas cleaning system |
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2006
- 2006-04-25 CN CNB2006100464425A patent/CN100488602C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105392547A (en) * | 2013-05-03 | 2016-03-09 | 氟石科技公司 | Systems and methods for multi-celled gas processing |
| US9975083B2 (en) | 2013-05-03 | 2018-05-22 | Fluor Technologies Corporation | Systems and methods for multi-celled gas processing |
| CN105392547B (en) * | 2013-05-03 | 2020-05-12 | 氟石科技公司 | System and method for multi-unit gas processing |
| CN104208996A (en) * | 2014-06-16 | 2014-12-17 | 中电投远达环保工程有限公司 | Desulfurizing and dedusting apparatus |
| CN104109898A (en) * | 2014-07-08 | 2014-10-22 | 德清县浙北通讯器材有限公司 | Waste gas treatment device of pickling or electroplating equipment |
| CN106823694A (en) * | 2017-03-31 | 2017-06-13 | 中科华瑞（北京）汽车环保科技有限公司 | A kind of pollutant handling arrangement and a kind of in-car gas purifying equipment |
| CN107224851A (en) * | 2017-07-14 | 2017-10-03 | 广东新派建材有限公司 | A kind of novel desulphurization method |
| CN107349775A (en) * | 2017-08-22 | 2017-11-17 | 吉林工业职业技术学院 | For carrying out the wet type unit and method of desulfurizing and purifying to calcining carbon flue gas |
| CN107998863A (en) * | 2017-11-28 | 2018-05-08 | 江苏民生重工有限公司 | A kind of efficient oxidation wet desulphurization device |
| CN108310950A (en) * | 2018-04-10 | 2018-07-24 | 李威 | The device of processing is absorbed for industrial waste gas |
| CN108310950B (en) * | 2018-04-10 | 2019-02-01 | 李威 | The device of processing is absorbed for industrial waste gas |
| CN108607344A (en) * | 2018-05-23 | 2018-10-02 | 绍兴市鼎泰节能环保科技有限公司 | A kind of chloride containing work waste gas cleaning system |
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