CN103566720B - Ammonia method flue gas desulfurization apparatus - Google Patents
Ammonia method flue gas desulfurization apparatus Download PDFInfo
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- CN103566720B CN103566720B CN201210251774.2A CN201210251774A CN103566720B CN 103566720 B CN103566720 B CN 103566720B CN 201210251774 A CN201210251774 A CN 201210251774A CN 103566720 B CN103566720 B CN 103566720B
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- pipe
- flue gas
- opening hole
- lateral opening
- aerosol
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Abstract
The present invention relates to an ammonia method flue gas desulfurization apparatus, which comprises a chimney for discharging purified flue gas, wherein an aerosol treatment device comprising a set of pipes arranged along an axial direction and with open pores on the side surface is arranged on the purified flue gas outlet position and inside the chimney, the pipe with open pores on the side surface has the inner diameter of 6-25 mm and the pipe height of 1-20 m, a coating comprising a porous material is coated on the inner wall of the pipe, the coating thickness is 10-70% of the inner diameter of the pipe, the pore size of the coating is 1-10 mum, and the side surface pore area is 5-30% of the side wall area of the pipe. According to the present invention, the ammonia method flue gas desulfurization apparatus can be used for treating aerosol produced during the ammonia method flue gas desulfurization apparatus operation process so as to significantly reduce escape of flue gas desulfurization apparatus ammonium sulfate in the aerosol form, increase economy of flue gas desulfurization apparatus ammonium sulfate, and reduce pollution of ammonium sulfate and the like in the aerosol on the environment.
Description
Technical field
The present invention relates to a kind of ammonia type flue gas desulfurizing apparatus.
Background technology
Along with expanding economy, the progress of society and the reinforcement of people's environmental consciousness, Industrial Boiler flue gas scrubbing CO_2 comes into one's own day by day.The more flue gas desulfurization technique of industrial application mainly contains wet limestone-gypsum FGD technique and ammonia process washing desulphurization process, wherein because ammonia process is absorption method, can make full use of China widely ammonia source to produce sulfur fertilizer, make up the breach of a large amount of imported sulphur of China, both the pollution of sulfur dioxide had been administered, meet Fertilizer demand a large amount of for a long time again, receive at home and pay close attention to widely, and have the commercial Application of ammonia desulfurizing process successively.But ammonia flue gas desulfurization technique is in actual moving process, often occur the phenomenon that ammonium sulfate is escaped with exiting flue gas, the escape of ammonium sulfate not only causes secondary pollution to environment, and have impact on the economic benefit of desulfurizer.Research shows easily to produce a large amount of aerosol particles in ammonia type flue gas desulfurizing process, and the formation of aerosol particle is mainly through two kinds of approach: the first, the gaseous state NH of ammoniacal liquor volatilization effusion
3with the SO in flue gas
2(NH is formed by gas-phase reaction
4)
2sO
3, NH
4hSO
3, (NH
4)
2sO
4etc. component, its composition depends mainly on SO
2/ NH
3h in ratio, temperature and flue gas
2o and O
2content etc.; The second, SO in ammonia absorption flue gas
2after desulfurization drop, in high-temperature flue gas, due to evaporation separate out solid grains.Bao Jing the waits quietly (aerosol particles utilizing steam phase transforming to remove to be formed in wet ammonia method for flue gas desulfurizing, power engineering, 2009, V29(2): 178 ~ 183) develop vapor phase political reform and remove the aerocolloidal method of sulphur ammonium, humidity of flue gas is improved by adding appropriate steam, the degree of supersaturation of steam needed for aerosol particle surface condensation can be reached, make steam in fine grained surface condensation, promote the aerosol particle condensation growth of submicron order, and removed the dust-laden drop of condensation growth by high efficiency demister.Zhang Guangxue etc. utilize sound wave to carry out radiation treatment to flue gas, and fine grained is reunited, and change domain size distribution, increase aerocolloidal average grain diameter, thus improve the removal efficiency in deduster.(the collection of pulsed discharge desulfurization product such as Jiang Yuze, environmental science, 2000, V(27) 2:50 ~ 53) utilize corona discharge pulse to the high feature of product particles carrying capacity, desulfurization product natural sediment under the effects such as eddy diffusivity, collision, intermolecular attraction, electrostatic attraction is made on tube wall, thus effectively to collect desulfurization product by the mode of adding DC base voltage to pulsed discharge desulfurization reactor.Although these methods have certain effect in application process, more complicated in application process, some equipment investments are higher, some inconvenient operation.
Summary of the invention
The invention provides a kind of ammonia type flue gas desulfurizing apparatus, form is simple, conveniently processes aerosol, to reduce the escape of ammonium sulfate in exhanst gas outlet, reduces the pollution that aerosol produces environment.
Described ammonia type flue gas desulfurizing apparatus, comprise the chimney of discharge neat stress, the pipe of one group of lateral opening hole and the aerosol treating apparatus of liquid trap composition are installed in the chimney in neat stress exit, the pipe of described one group of lateral opening hole, its bore is 6mm ~ 25mm, pipe height 1m ~ 20m, inside pipe wall lays the coating be made up of porous material etc., and coating layer thickness is 10% ~ 70% of caliber.There is the mode of pipe lateral opening hole can be strip, circle, square etc., lateral aperture area is 5% ~ 30% of pipe area, the total sectional area of the pipe of one group of lateral opening hole be stack cross section long-pending 10% ~ 70%, the top of one group of lateral opening hole pipe is connected with flushing water entrance, and bottom is connected with liquid trap.
Preferably, the pipe of described one group of lateral opening hole is uniformly distributed in chimney.
Described coating material can be the porous materials such as fiber, active carbon, diatomite.
Described liquid trap is channel-shaped structure, is connected to the absorbing liquid spray place (referring to the absorbing liquid spray place for desulfurization) of flue gas desulfur device bottom it.Liquid trap can be one, and namely the liquid of all pipes collected by liquid trap, may also be multiple liquid trap, and namely the liquid of 1 ~ 10 pipe collected by liquid trap.
Described flushing water can be continuous flushing also can be interval backwashing manner, and in the pipe of every root lateral opening hole, flushing water average discharge is 10 ~ 100L/h.The water that liquid trap is collected as the absorbing liquid of desulfurizer, can enter absorbing liquid spray place, also can directly discharge.The Ammonium Sulfate Aerosol be adsorbed in pipe can be taken out of by flushing water.
Action principle of the present invention is: by arranging the pipe of one group of lateral opening hole in the chimney of ammonia desulfuration equipment discharge neat stress.Occupy the free air space of flue gas in chimney, make the turbulence of flow of flue gas more strong, be conducive to the collision in flue gas between aerosol particle, grow up.Aerosol particle enters in pipe, by the porous material absorption in pipe, thus reaches and removes aerocolloidal object in flue gas.
The present invention may be used for processing the aerosol produced in ammonia type flue gas desulfurizing apparatus running, significantly reduce flue gas desulfur device ammonium sulfate with the escape of aerosol form, improve the economy of flue gas desulfur device ammonium sulfate, reduce the pollution to environment such as ammonium sulfate in aerosol simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of embodiment 1 ammonia type flue gas desulfurizing apparatus used, wherein
1: flue gas desulfur device chimney, 2: lateral opening hole tubulation, 3: liquid trap.
Detailed description of the invention
The following examples will be described further method provided by the invention, but the present invention is not limited to embodiment.
Embodiment 1
Aerosol treating apparatus is installed additional in ammonia type flue gas desulfurizing apparatus, the length of aerosol treating apparatus lateral opening hole pipe is 1m, caliber is 6mm, scribble the diatomite coating that 1mm is thick in pipe, lateral opening hole is made up of the circular hole of Φ 1, uniform on pipe side, hole area is 5% of pipe area, the sectional area of lateral opening hole pipe is 70% of chimney internal diameter, bottom pipe, be provided with liquid trap, collects flushing water.It is 310mg/m that ammonium sulfate is contained in neat stress Central Plains
3, after installing aerosol treating apparatus additional, in neat stress, ammonium sulphate content is reduced to 38mg/m
3, the removal efficiency of ammonium sulfate is 87.7%.
Embodiment 2
Aerosol treating apparatus is installed additional in ammonia type flue gas desulfurizing apparatus, the length of aerosol treating apparatus lateral opening hole pipe is 20m, caliber is 25mm, scribble the fiber coat that 10mm is thick in pipe, lateral opening hole is made up of the elongate holes of 1mm × 10mm, uniform on pipe side, hole area is 30% of pipe area, the sectional area of lateral opening hole pipe is 10% of chimney internal diameter, bottom pipe, be provided with liquid trap, collects flushing water.It is 310mg/m that ammonium sulfate is contained in neat stress Central Plains
3, after installing aerosol treating apparatus additional, in neat stress, ammonium sulphate content is reduced to 46mg/m
3, the removal efficiency of ammonium sulfate is 85.2%.
Embodiment 3
Aerosol treating apparatus is installed additional in ammonia type flue gas desulfurizing apparatus, the length of aerosol treating apparatus lateral opening hole pipe is 10m, caliber is 6mm, scribble the activated carbon coating that 3mm is thick in pipe, lateral opening hole is made up of the square hole of 2mm × 2mm, uniform on pipe side, hole area is 5% of pipe area, the sectional area of lateral opening hole pipe is 50% of chimney internal diameter, bottom pipe, be provided with liquid trap, collects flushing water.It is 310mg/m that ammonium sulfate is contained in neat stress Central Plains
3, after installing aerosol treating apparatus additional, in neat stress, ammonium sulphate content is reduced to 29mg/m
3, the removal efficiency of ammonium sulfate is 90.6%.
Embodiment 4
Aerosol treating apparatus is installed additional in ammonia type flue gas desulfurizing apparatus, the length of aerosol treating apparatus lateral opening hole pipe is 10m, caliber is 6mm, scribble the activated carbon coating that 4mm is thick in pipe, lateral opening hole is made up of the circular hole of Φ 1, uniform on pipe side, hole area is 10% of pipe area, the sectional area of lateral opening hole pipe is 70% of chimney internal diameter, bottom pipe, be provided with liquid trap, collects flushing water.It is 310mg/m that ammonium sulfate is contained in neat stress Central Plains
3, after installing aerosol treating apparatus additional, in neat stress, ammonium sulphate content is reduced to 23mg/m
3, the removal efficiency of ammonium sulfate is 92.6%.
Embodiment 5
Aerosol treating apparatus is installed additional in ammonia type flue gas desulfurizing apparatus, the length of aerosol treating apparatus lateral opening hole pipe is 10m, caliber is 6mm, scribble the activated carbon coating that 1mm is thick in pipe, lateral opening hole is made up of the square hole of 2mm × 2mm, uniform on pipe side, hole area is 5% of pipe area, the sectional area of lateral opening hole pipe is 30% of chimney internal diameter, bottom pipe, be provided with liquid trap, collects flushing water.It is 310mg/m that ammonium sulfate is contained in neat stress Central Plains
3, after installing aerosol treating apparatus additional, in neat stress, ammonium sulphate content is reduced to 34mg/m
3, the removal efficiency of ammonium sulfate is 89.0%.
Claims (2)
1. an ammonia type flue gas desulfurizing apparatus, comprise the chimney of discharge neat stress, it is characterized in that, the pipe of one group of lateral opening hole arranged vertically and the aerosol treating apparatus of liquid trap composition are installed in the chimney in neat stress exit, the pipe of described one group of lateral opening hole, its bore is 6mm ~ 25mm, pipe height 1m ~ 20m, inside pipe wall applies the coating be made up of porous material, coating layer thickness is 10% ~ 70% of bore, the aperture of coating is 1 ~ 10 μm, lateral aperture area is 5% ~ 30% of pipe sidewall area, the total sectional area of the pipe of described one group of lateral opening hole be stack cross section long-pending 10% ~ 70%, the top of described one group of lateral opening hole pipe is connected with flushing water entrance, bottom is connected with liquid trap, described porous material is fiber, active carbon or diatomite.
2. ammonia type flue gas desulfurizing apparatus as claimed in claim 1, it is characterized in that, the pipe of described one group of lateral opening hole is uniformly distributed in chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251774.2A CN103566720B (en) | 2012-07-20 | 2012-07-20 | Ammonia method flue gas desulfurization apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251774.2A CN103566720B (en) | 2012-07-20 | 2012-07-20 | Ammonia method flue gas desulfurization apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN103566720A CN103566720A (en) | 2014-02-12 |
| CN103566720B true CN103566720B (en) | 2015-06-10 |
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| CN201210251774.2A Active CN103566720B (en) | 2012-07-20 | 2012-07-20 | Ammonia method flue gas desulfurization apparatus |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2071081U (en) * | 1990-06-29 | 1991-02-13 | 戴利国 | Exhaust air purifier |
| CN101277749A (en) * | 2005-09-02 | 2008-10-01 | 巴斯夫欧洲公司 | Method and device for removing sulphur dioxide from a dry gas stream |
| WO2010062794A1 (en) * | 2008-11-26 | 2010-06-03 | Corning Incorporated | Coated particulate filter and method |
| CN101927129A (en) * | 2010-09-15 | 2010-12-29 | 江苏和亿昌环保工程科技有限公司 | Monotower ammonia desulfuration recovery method for removing aerosols in flue gas |
| WO2012062465A1 (en) * | 2010-11-11 | 2012-05-18 | Reventa Kunststoffverarbeitung Gmbh & Co. Kg | Apparatus for purifying exhaust air |
-
2012
- 2012-07-20 CN CN201210251774.2A patent/CN103566720B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2071081U (en) * | 1990-06-29 | 1991-02-13 | 戴利国 | Exhaust air purifier |
| CN101277749A (en) * | 2005-09-02 | 2008-10-01 | 巴斯夫欧洲公司 | Method and device for removing sulphur dioxide from a dry gas stream |
| WO2010062794A1 (en) * | 2008-11-26 | 2010-06-03 | Corning Incorporated | Coated particulate filter and method |
| CN101927129A (en) * | 2010-09-15 | 2010-12-29 | 江苏和亿昌环保工程科技有限公司 | Monotower ammonia desulfuration recovery method for removing aerosols in flue gas |
| WO2012062465A1 (en) * | 2010-11-11 | 2012-05-18 | Reventa Kunststoffverarbeitung Gmbh & Co. Kg | Apparatus for purifying exhaust air |
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| CN103566720A (en) | 2014-02-12 |
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