CN102954678A - Method and device using biomass boiler smoke to dry biomass raw material - Google Patents
Method and device using biomass boiler smoke to dry biomass raw material Download PDFInfo
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- CN102954678A CN102954678A CN2012104426748A CN201210442674A CN102954678A CN 102954678 A CN102954678 A CN 102954678A CN 2012104426748 A CN2012104426748 A CN 2012104426748A CN 201210442674 A CN201210442674 A CN 201210442674A CN 102954678 A CN102954678 A CN 102954678A
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- flue gas
- biomass
- hothouse
- biomass material
- crawler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
- F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/02—Biomass, e.g. waste vegetative matter, straw
Abstract
The invention discloses a method and device using biomass boiler smoke to dry biomass raw material. The method comprises the following steps of guiding the biomass raw material to a belt conveyor in a drying chamber, carrying out dynamic conveying, guiding the biomass boiler smoke after being subjected to the dust removal treatment into the biomass raw material to carry out contact heat exchanging, and then removing part of moisture from the biomass raw material; carrying out dust removal treatment on the smoke after being subjected to the heat exchange, directly using the dried biomass raw material as the fuel of a biomass boiler, or storing the dried biomass material for standby. The device mainly consists of a smoke circulation system and the belt conveyor, wherein the smoke circulation system consists of a dust remover, the drying chamber, a booster fan, a draught fan and the like, and the belt conveyor is arranged in the drying chamber and is used for conveying the biomass raw material. The method and the device have the advantages that the structure is simple, the technology is economic, the drying effect is good, the size of the biomass boiler system can be effectively reduced, and the heat efficiency of the biomass boiler system is greatly improved.
Description
Technical field
The present invention relates to boiler afterheat utilization and energy-conserving and emission-cutting technology, refer to particularly a kind of method and device thereof that utilizes biomass boiler flue gas drying biomass material.
Background technology
Day by day minimizing along with reserves such as traditional fossil energy coal, oil, natural gases, and because the problem of environmental pollution that uses fossil energy to bring is directly threatening human survival and development, pay attention to and develop the common objective that the reproducible environment-friendly type energy has become national governments.The living beings organic substance that to be plants generate by photosynthesis, it is widely distributed, amount usable is large, clean than fossil energy, has the characteristics of carbon dioxide zero discharge, is a kind of important regenerative resource.Biomass material generally contains large quantity of moisture, if process without drying before entering boiler acting as a fuel, then the caloric value of unit mass biomass material is on the low side, cause the gross efficiency of biomass boiler to descend, also can increase the size of biomass boiler feeding pipe and burner hearth, cause the boiler cost to increase.Therefore, biomass material needs to do pre-dried as last entering biomass boiler.
Traditional biomass material drying means need to be introduced outside high temperature drying medium, and its technique is loaded down with trivial details, equipment is complicated, energy consumption is large, cost of investment is high.In order to address the above problem, publication number is that the Chinese invention patent application prospectus of CN101693248A has proposed a kind of method of using high-temperature flue gas biomass material to be carried out drying, it makes the water-contained biomass raw material behind high temperature flue gas drying, through the heating pressurized treatments, make the fluidisation slurry again.But this method need to be introduced outside high temperature drying medium, and energy consumption is very big, can not adapt to energy-saving and emission-reduction requirement more and more higher in the national economic development at present.Notification number is that the Chinese utility model patent specification of CN202032602U has been announced the integrated system of the predrying generating of a kind of flue gas, it utilizes smoke pre-heating that boiler brown coal raw material is carried out drying, but the roller equipment of Dryly use still needs a large amount of electric energy of additive decrementation, thereby has increased operation difficulty and the operating cost of system.
Summary of the invention
Purpose of the present invention is exactly will overcome in the existing biomass material dry technology to have the defective that device structure is complicated, energy consumption is high, and a kind of method and device thereof that utilizes biomass boiler flue gas drying biomass material is provided.It is simple in structure, process economics, drying effect are good, can effectively dwindle the size of biomass boiler system, significantly improve the thermal efficiency of biomass boiler system.
For achieving the above object, the method for utilizing biomass boiler flue gas drying biomass material that the present invention is designed may further comprise the steps:
1) biomass material that will be to be burnt imports on the working face of the crawler-tread machine that arranges in the hothouse, carries out continual dynamic transmission;
2) high-temperature flue gas with the biomass boiler burning and exhausting imports in the deduster, removes the wherein dust impurity of the overwhelming majority, obtains comparatively clean flue gas;
A part of 3) getting in the comparatively clean flue gas of gained is transported in the hothouse, makes its working face space of passing through the crawler-tread machine from bottom to top, carries out contact heat-exchanging with the biomass material of dynamic transmission, thereby removes the part moisture content in the biomass material;
4) will derive hothouse through the flue gas that heat exchange utilizes, and again be delivered to continuation processing in the deduster;
5) will derive hothouse through the biomass material that dehydrates, directly as the fuel of biomass boiler or store for subsequent use.
As preferred version, above-mentioned steps 3) in, flue gas is concentrated first in the hot blast air chamber that is transported to the working face below that is arranged on the crawler-tread machine, overflows from hot blast air chamber top again, pass through the working face space of crawler-tread machine, carry out contact heat-exchanging with the biomass material of dynamic transmission.Like this, can cushion the flue gas that enters hothouse, make its uniform distribution carry out drying to the biomass material of dynamic transmission.
Further, the temperature of above-mentioned flue gas in the hothouse porch is controlled at 110 ~ 150 ℃, preferably is controlled at 120 ~ 130 ℃; The temperature of above-mentioned flue gas in the hothouse exit is controlled at 45 ~ 55 ℃, preferably is controlled at 48 ~ 50 ℃.Like this, the flue-gas temperature that enters hothouse is lower than the minimum Precipitation Temperature of the component that effectively volatilizees in the biomass material, can guarantee that biomass material loses without active princlple in dry run; And only be higher than tens degrees centigrade of normal temperature from the flue-gas temperature of hothouse output, can guarantee that biomass material takes full advantage of fume afterheat.
Further, the transmission speed of above-mentioned biomass material on the crawler-tread machine is 0.2 ~ 0.8m/s, and the time of staying is 300 ~ 480s; The mean flow rate of above-mentioned flue gas in hothouse is 8 ~ 15m/s.Like this, by the reasonable control to biomass material and the smoke gas flow exposure parameter of dynamic transmission, the heat exchange that can guarantee both is kept stable all the time, thereby satisfies the industrial continuously uninterrupted needs of producing.
For realizing the custom-designed device that utilizes biomass boiler flue gas drying biomass material of said method, comprise deduster and hothouse, its special character is: described hothouse inner chamber is provided with the crawler-tread machine, described hothouse top is respectively arranged with biomass feed inlet and smoke outlet tube, and described hothouse bottom is respectively arranged with living beings discharging opening and flue gas inlet tube; Described biomass feed inlet is positioned at crawler-tread machine input top, described living beings discharging opening is positioned at crawler-tread machine output below, described smoke outlet tube links to each other with the input of deduster by booster fan, and described flue gas inlet tube links to each other with the output of deduster by air-introduced machine.
As preferred version, the working face below of described crawler-tread machine is set side by side with a plurality of independently hot blast air chambers, described hot blast air chamber bottom is provided with air intake branch, and described air intake branch links to each other with flue gas inlet tube, and described hot blast air chamber top is evenly equipped with the flue gas diffusion hole.Like this, can cushion the flue gas that enters hothouse, make its working face that evenly passes through the crawler-tread machine, thereby the biomass material of dynamic transmission is carried out even drying.
Further, be provided with control valve on the described air intake branch.Like this, can regulate easily the flue gas flow of each air intake branch, guarantee the flue gas distributed uniform that enters each hot blast air chamber.
Further, be provided with the hot blast even distribution device in the described hot blast air chamber.Like this, can regulate the flow of flue gas direction of each hot blast air chamber inside, thereby flue gas flow field is formulated to optimum state.
The invention has the advantages that: designed drying means directly utilizes the high-temperature flue gas of biomass boiler discharging as thermal source, biomass material is dehydrated, the gross mass of biomass material can be alleviated more than 15%, can remove in the biomass material the approximately moisture of half, thereby the caloric value of unit mass biomass material is significantly increased.Like this, both can significantly improve the thermal efficiency of biomass boiler system, have considerable economic benefit; Can correspondingly dwindle again the size of biomass boiler system feeding pipe.And the flue gas flow that dry biomass material burning produces is relatively low, and the size that can also dwindle whole biomass boiler system effectively reduces the cost of boiler.Simultaneously, after the biomass material drying, the humidity of the flue gas that it produces in combustion process and flow also all obviously descend, and therefore discharge the flue gas of boiler when carrying out dedusting by deduster, humidity and the also corresponding decline of flow of the flue gas that deduster is processed are conducive to improve efficiency of dust collection.
In addition, the designed apparatus structure of the present invention is simple, little, the dry air quantity of investment is convenient regulates and distributed uniform, can satisfy well the requirement of biomass material drying.Although it increases with the energy consumption that overcomes on the SR to some extent at increase section of tubing and blower fan, compares with high thermal efficiency with the low boiler cost that it is harvested, the energy consumption ratio of increase is extremely low, and whole system energy-saving and emission-reduction benefit is obvious.
Description of drawings
Fig. 1 is a kind of structural representation that utilizes the device of biomass boiler flue gas drying biomass material.
Fig. 2 is the structure for amplifying schematic diagram of hothouse part among Fig. 1.
Fig. 3 is the A-A section structure for amplifying schematic diagram of Fig. 2.
Among the figure: biomass boiler 1, biomass feed inlet 2, deduster 3, living beings discharging opening 4, chimney 5, air-introduced machine 6, crawler-tread machine 7, hothouse 8, feed bin 9, booster fan 10, flue gas inlet tube 11, air intake branch 12, control valve 13, hot blast even distribution device 14, hot blast air chamber 15, flue gas diffusion hole 16, smoke outlet tube 17.
The specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Utilize the device of biomass boiler flue gas drying biomass material shown in the figure, comprise the deduster 3 and the hothouse 8 that are arranged between biomass boiler 1 and the chimney 5.The input of deduster 3 links to each other with the exhanst gas outlet of biomass boiler 1, and the output of deduster 3 links to each other with chimney 5.Be provided with crawler-tread machine 7 in the hothouse 8, hothouse 8 tops are respectively arranged with biomass feed inlet 2 and smoke outlet tube 17, and hothouse 8 bottoms are respectively arranged with living beings discharging opening 4 and flue gas inlet tube 11.Biomass feed inlet 2 is positioned at crawler-tread machine 7 inputs top, and links to each other with feed bin 9.Living beings discharging opening 4 is positioned at crawler-tread machine 7 outputs below, can be transported to by transloading equipment the fuel inlet of biomass boiler 1 from living beings discharging opening 4 dried biomass raw material out.Smoke outlet tube 17 links to each other with the input of deduster 3 by booster fan 10, and flue gas inlet tube 11 links to each other with the output of deduster 3 by air-introduced machine 6.
Be provided with side by side a plurality of independently hot blast air chambers 15 below the working face of crawler-tread machine 7, each hot blast air chamber 15 bottom is provided with air intake branch 12, and each air intake branch 12 links to each other with flue gas inlet tube 11 simultaneously, and each air intake branch 12 is provided with control valve 13.Be positioned at air intake branch 12 outlet tops in each hot blast air chamber 15 and also be provided with hot blast even distribution device 14.In the present embodiment, hot blast even distribution device 14 leaves the gap for the fixing baffle plate of level around it and between the hot blast air chamber 15, is used for disperseing to enter the flue gas of hot blast air chamber 15.Each hot blast air chamber 15 top is evenly equipped with flue gas diffusion hole 16, and flue gas can evenly pass through by flue gas diffusion hole 16 working face of crawler-tread machine 7.
The fresh biomass raw material that accounts for gross mass about 30% take water content is as example, and said apparatus is to utilize like this biomass boiler flue gas drying biomass material:
The biomass burning raw material for the treatment of that is stored in the feed bin 9 enters on the working face of the crawler-tread machine 7 in the hothouse 8 by biomass feed inlet 2, carries out continual dynamic transmission, at last from 4 outputs of living beings discharging opening.The transmission speed of biomass material on crawler-tread machine 7 is preferably 0.2 ~ 0.8m/s, optimum range at 0.4 ~ 0.6m/s, and the time of staying is preferably 300 ~ 480s, optimum range at 400 ~ 450s; The mean flow rate of flue gas in hothouse 8 is preferably 8 ~ 15m/s, optimum range at 10 ~ 12m/s.
Meanwhile, the high-temperature flue gas of biomass boiler 1 burning and exhausting enters in the deduster 3, removes the wherein dust impurity of the overwhelming majority, obtains comparatively clean flue gas.In the comparatively clean flue gas of gained, a part enters atmosphere by chimney 5, and another part is by air-introduced machine 6 pressurizations, enters each hot blast air chamber 15 in the hothouse 8 through flue gas inlet tube 11, air intake branch 12.Flue gas in each hot blast air chamber 15 is by after 14 current-sharings of hot blast even distribution device, overflow through the flue gas diffusion hole 16 at hot blast air chamber 15 tops again, make flue gas pass through the working face space of crawler-tread machine 7 from bottom to top, carry out contact heat-exchanging with the biomass material of dynamic transmission on it, thereby remove the part moisture content in the biomass material.
Controlling the temperature of above-mentioned flue gas in hothouse 8 porch and be 110 ~ 150 ℃, the temperature in hothouse 8 exits is 45 ~ 55 ℃, can take full advantage of waste heat and the temperature difference of flue gas, obtains good drying effect.In the present embodiment, the temperature of flue gas in hothouse 8 porch is 120 ~ 130 ℃, and the temperature of flue gas in hothouse 8 exits is 48 ~ 50 ℃.
At last, derive hothouses 8 through the flue gas that heat exchange utilizes by smoke outlet tube 17, and again be delivered in the deduster 3 and proceed dust removal process; Simultaneously, derive hothouses 8 through the biomass material that dehydrates by living beings discharging opening 4, directly as the fuel of biomass boiler 1 or store for subsequent use.
The results showed: when the smoke inlet temperature of hothouse 8 about 130 ℃, the exhanst gas outlet temperature about 50 ℃, the flue gas mean flow rate is during in the 12m/s left and right sides, approximately can slough the moisture that accounts for gross mass about 15% by the biomass material of hothouse 8.Because flue-gas temperature is lower than the minimum Precipitation Temperature of volatile matter in the biomass material, therefore there is not the problem of Volatile.
Claims (10)
1. method of utilizing biomass boiler flue gas drying biomass material may further comprise the steps:
1) biomass material that will be to be burnt imports on the working face of the crawler-tread machine (7) that arranges in the hothouse (8), carries out continual dynamic transmission;
2) high-temperature flue gas with biomass boiler (1) burning and exhausting imports in the deduster (3), removes the wherein dust impurity of the overwhelming majority, obtains comparatively clean flue gas;
A part of 3) getting in the comparatively clean flue gas of gained is transported in the hothouse (8), make it pass through the working face space of crawler-tread machine (7) from bottom to top, carry out contact heat-exchanging with the biomass material of dynamic transmission, thereby remove the part moisture content in the biomass material;
4) will derive hothouse (8) through the flue gas that heat exchange utilizes, and again be delivered to continuation processing in the deduster (3);
5) will derive hothouse (8) through the biomass material that dehydrates, directly as the fuel of biomass boiler (1) or store for subsequent use.
2. the described method of utilizing biomass boiler flue gas drying biomass material according to claim 1, it is characterized in that: in the described step 3), flue gas is concentrated first in the hot blast air chamber (15) that is transported to the working face below that is arranged on crawler-tread machine (7), overflow from hot blast air chamber (15) top again, pass through the working face space of crawler-tread machine (7), carry out contact heat-exchanging with the biomass material of dynamic transmission.
3. the described method of utilizing biomass boiler flue gas drying biomass material according to claim 1 and 2, it is characterized in that: described flue gas is 110 ~ 150 ℃ in the temperature of hothouse (8) porch, and described flue gas is 45 ~ 55 ℃ in the temperature in hothouse (8) exit.
4. the described method of utilizing biomass boiler flue gas drying biomass material according to claim 1 and 2, it is characterized in that: described flue gas is 120 ~ 130 ℃ in the temperature of hothouse (8) porch, and described flue gas is 48 ~ 50 ℃ in the temperature in hothouse (8) exit.
5. the described method of utilizing biomass boiler flue gas drying biomass material according to claim 1 and 2, it is characterized in that: the transmission speed of described biomass material on crawler-tread machine (7) is 0.2 ~ 0.8m/s, and the time of staying is 300 ~ 480s; The mean flow rate of described flue gas in hothouse (8) is 8 ~ 15m/s.
6. device that utilizes biomass boiler flue gas drying biomass material for realizing that the described method of claim 1 designs, comprise deduster (3) and hothouse (8), it is characterized in that: described hothouse (8) inner chamber is provided with crawler-tread machine (7), described hothouse (8) top is respectively arranged with biomass feed inlet (2) and smoke outlet tube (17), and described hothouse (8) bottom is respectively arranged with living beings discharging opening (19) and flue gas inlet tube (11); Described biomass feed inlet (2) is positioned at crawler-tread machine (7) input top, described living beings discharging opening (4) is positioned at crawler-tread machine (7) output below, described smoke outlet tube (17) links to each other with the input of deduster (3) by booster fan (10), and described flue gas inlet tube (11) links to each other with the output of deduster (3) by air-introduced machine (6).
7. the described device that utilizes biomass boiler flue gas drying biomass material according to claim 6, it is characterized in that: the working face below of described crawler-tread machine (7) is set side by side with a plurality of independently hot blast air chambers (15), described hot blast air chamber (15) bottom is provided with air intake branch (12), described air intake branch (12) links to each other with flue gas inlet tube (11), and described hot blast air chamber (15) top is evenly equipped with flue gas diffusion hole (16).
8. the described device that utilizes biomass boiler flue gas drying biomass material according to claim 7 is characterized in that: be provided with control valve (13) on the described air intake branch (12).
9. it is characterized in that: be provided with hot blast even distribution device (14) in the described hot blast air chamber (15) according to claim 7 or the 8 described devices that utilize biomass boiler flue gas drying biomass material.
10. the described device that utilizes biomass boiler flue gas drying biomass material according to claim 9, it is characterized in that: described hot blast even distribution device (14) is the horizontal baffle that is positioned at air intake branch (12) outlet top.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442674.8A CN102954678B (en) | 2012-11-07 | 2012-11-07 | Utilize method and the device thereof of biomass boiler flue gas drying biomass material |
| PCT/CN2013/085685 WO2014071800A1 (en) | 2012-11-07 | 2013-10-22 | Method and apparatus for drying biomass raw material using biomass boiler flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210442674.8A CN102954678B (en) | 2012-11-07 | 2012-11-07 | Utilize method and the device thereof of biomass boiler flue gas drying biomass material |
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| CN102954678A true CN102954678A (en) | 2013-03-06 |
| CN102954678B CN102954678B (en) | 2015-08-19 |
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| WO (1) | WO2014071800A1 (en) |
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| CN103446960A (en) * | 2013-08-06 | 2013-12-18 | 中国华能集团清洁能源技术研究院有限公司 | Chain fluidization drying machine |
| WO2014071800A1 (en) * | 2012-11-07 | 2014-05-15 | 阳光凯迪新能源集团有限公司 | Method and apparatus for drying biomass raw material using biomass boiler flue gas |
| CN104567335A (en) * | 2015-01-27 | 2015-04-29 | 中国能源建设集团江苏省电力设计院有限公司 | System and technological method for drying coal slime by high-temperature flue gas of power station |
| CN105066660A (en) * | 2015-08-13 | 2015-11-18 | 广西鹿寨县金达珑茧丝有限责任公司 | Tail gas treatment device of boiler of reeling mill |
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| WO2014071800A1 (en) * | 2012-11-07 | 2014-05-15 | 阳光凯迪新能源集团有限公司 | Method and apparatus for drying biomass raw material using biomass boiler flue gas |
| CN103446960B (en) * | 2013-08-06 | 2015-12-23 | 中国华能集团清洁能源技术研究院有限公司 | A kind of chain-type fluidized dryer |
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| CN106123491A (en) * | 2016-06-16 | 2016-11-16 | 安徽新生力生物科技有限公司 | A kind of moist wood drying means based on biomass fuel |
| CN106705028A (en) * | 2017-03-02 | 2017-05-24 | 长沙市驱动源电气技术有限公司 | Self-forming combustor for biomass powder |
| CN107576178A (en) * | 2017-08-31 | 2018-01-12 | 北京环清环境科技有限公司 | A kind of material drying system and operation method |
| CN109724392A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN109724393A (en) * | 2017-10-27 | 2019-05-07 | 井关农机株式会社 | Crop drying machine |
| CN109724392B (en) * | 2017-10-27 | 2022-04-01 | 井关农机株式会社 | Crop dryer |
| CN109210910A (en) * | 2018-07-27 | 2019-01-15 | 浙江浙能富兴燃料有限公司 | A method of utilizing coal-burning power plant's Secondary Air dried biomass |
| CN113251748A (en) * | 2021-05-18 | 2021-08-13 | 山东大学 | Solar heat collection, storage and drying system for biomass power plant fuel |
Also Published As
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| WO2014071800A1 (en) | 2014-05-15 |
| CN102954678B (en) | 2015-08-19 |
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