CN107020005A - A kind of minimum discharge system for desulfuration and denitration - Google Patents
A kind of minimum discharge system for desulfuration and denitration Download PDFInfo
- Publication number
- CN107020005A CN107020005A CN201610069735.9A CN201610069735A CN107020005A CN 107020005 A CN107020005 A CN 107020005A CN 201610069735 A CN201610069735 A CN 201610069735A CN 107020005 A CN107020005 A CN 107020005A
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- CN
- China
- Prior art keywords
- minimum discharge
- denitration
- desulfuration
- discharge system
- desulfurizer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/40—Mixed oxides
Abstract
The invention discloses a kind of minimum discharge system for desulfuration and denitration, include desulfurizer and denitrification apparatus successively according to production process, desulfurizer bottom is provided with gas approach, top is provided with exhanst gas outlet, desulfurizer top, which is provided with above at least one layer of spray thrower, spray thrower, is provided with electrostatic precipitator, and electrostatic precipitator includes corona wire and collecting polar plate, water tank is provided with below gas approach, smoke outlet sets cyclone separator；Denitrification apparatus is sequentially provided with smoke inlet along flow of flue gas direction, sprays ammonia part, catalyst module, and exhanst gas outlet, and what catalyst module included glass-ceramic fiber base material and dipping contains V2O5, WO3, TiO2, MoO3And CeO2Mixture.Minimum discharge system for desulfuration and denitration is due to being provided with high-efficiency cyclone separator and electrostatic precipitator, and improve the formula of catalyst, denitrating flue gas and except fog effect is good, the treatment effeciency of flue gas is high, there is simple in construction, construction and the low advantage of operating cost compared with prior art.
Description
Technical field
The invention belongs to environmental technology field, and in particular to a kind of minimum discharge system for desulfuration and denitration.
Background technology
Rich coal resources in China, the technical field such as coal is widely used in generating electricity, heated as fuel, metallurgy, thus causes the discharge capacity of China's sulfur dioxide huge, serious pollution is caused to air.With the enhancing of people's environmental consciousness, the purification standard of fume emission is improved rapidly, particularly strict standard limit of smog release has been formulated coal-fired electric generation furnace.Traditional removing sulfur, dust and fog from flue gas equipment is made up of horizontal Venturi tube, multigroup sparge pipe, main tower and centrifugal separating device, this equipment by its structure by being limited, there is neat stress passway flue gas after desulfurization and contain ash, band mist, dedusting is bad except fog effect, desulfuration efficiency is relatively low, floor space is larger, the problem of engineering construction cost is high.Current sulfur method mainly has three kinds, respectively wet method, semidry method and the class technique of dry method three, dry method, the desulfurization product of semidry method are dry powder-shaped, processing is easy, investment is low, but calcium sulfur ratio is high, sorbent utilization is low, and desulfuration efficiency is low, wet desulphurization efficiency high, calcium sulfur ratio is low, simple to operate, but invests larger, system is unstable during long-play, trace it to its cause mainly its use circulation desulfurization means, the flue that dust in sweetening process can be in block system causes system desulfurized effect undesirable.It is mainly in the market applied to stationary source tail-gas denitration and uses cellular catalyst.The catalyst has relatively low pressure drop, abrasion resistance properties and excellent denitration activity and is increasingly widely applied, but there are some shortcomings in existing cellular catalyst, its optimum working temperature is general at 300~450 DEG C, and in actual condition, flue-gas temperature is difficult to reach this temperature range, another heating source is also needed to obtain preferable denitration effect, so that cost is improved.Also in order to reach preferable denitration effect and sulfur resistive water repelling property, honeycomb type denitrification catalyst typically has higher hole density, but a large amount of water, sulfur dioxide and dust contained in actual flue gas etc. is easy to block catalyst, considerably increases the energy consumption of dynamical system.Therefore need to develop can have excellent denitration activity, sulfur resistive water repelling property at a lower temperature, and the catalyst with anti-dust blocking ability.
The content of the invention
To solve the above problems, it is good it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of desulfurization off sulfide effect, and can effectively solve the problem that existing apparatus is very low to dust particale removal efficiency, the problem of causing environmental pollution.
The technical scheme is that：A kind of minimum discharge system for desulfuration and denitration, include desulfurizer and denitrification apparatus successively according to production process, the desulfurizer bottom is provided with gas approach, top is provided with exhanst gas outlet, the desulfurizer top, which is provided with above at least one layer of spray thrower, the spray thrower, is provided with electrostatic precipitator, and the electrostatic precipitator includes corona wire and collecting polar plate, slurry pool is provided with below the gas approach, the smoke outlet sets cyclone separator；The denitrification apparatus is sequentially provided with smoke inlet along flow of flue gas direction, sprays ammonia part, catalyst module, and exhanst gas outlet, and what the catalyst module included glass-ceramic fiber base material and dipping contains V2O5, WO3, TiO2, MoO3And CeO2Mixture.
Further, the spray thrower, which amounts to, three layers, and gas liquid ratio can be set as 1:15.
Further, pallet is provided between the spray thrower and gas approach, the pallet is the sieve plate of horizontal, and Ball-type packing is provided with the sieve plate.
Further, the Ball-type packing is plastic filler ball.
Further, the uniform flow grid being made up of gusset horizontally arranged at regular intervals are set below the spray thrower, multilayer can be set in the uniform flow grid, and the gusset position of each adjacent layer is staggeredly arranged.
Further, the cyclone separator is multitube cyclone separator.
Further, the cyclone separator includes the cyclone cylinder of multiple tangential entries.
Further, the cyclone cylinder of the tangential entry includes housing, the inner chamber connected along housing tangential direction, and bottom cone and hopper.
Further, each component mass ratio of dip compound is V in the catalyst module2O510-20%, WO35-10%, TiO220-30%, MoO32-6% and CeO22-6%.Denitration efficiency can be brought up to 30% by the catalyst module of the application.
The beneficial effect of inventive desulfurization denitrating system：Due to being provided with high-efficiency cyclone separator and high efficiency demister, and the formula of catalyst is improved, flue gas is good except fog effect, the treatment effeciency of flue gas is high, reaches dirt<5mg/M3, S<75mg/M3, NO<50mg/M3.There is advantages below compared with prior art, it is simple in construction, build and operating cost is low.
Technical scheme is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structural representation of minimum discharge system for desulfuration and denitration of the present invention；
Fig. 2 is the structural representation of pallet in minimum discharge system for desulfuration and denitration of the present invention；
Fig. 3 is the structural representation of multitube cyclone separator in minimum discharge system for desulfuration and denitration of the present invention.
In figure：1st, desulfurizer, 2, gas approach, 3, exhanst gas outlet, 4, spray thrower, 5, high efficiency demister, 6, slurry pool, 7, cyclone separator, 8, pallet, 9, Ball-type packing
Embodiment
Fig. 1 is the structural representation of minimum discharge system for desulfuration and denitration of the present invention, Fig. 2 is the structural representation of pallet in minimum discharge system for desulfuration and denitration of the present invention, Fig. 3 is the structural representation of multitube cyclone separator in minimum discharge system for desulfuration and denitration of the present invention, as Figure 1-3, the present invention provides a kind of minimum discharge system for desulfuration and denitration, include desulfurizer and denitrification apparatus successively according to production process, the desulfurizer bottom is provided with gas approach, top is provided with exhanst gas outlet, the desulfurizer top is provided with least one layer of spray thrower, electrostatic precipitator is provided with above the spray thrower, the electrostatic precipitator includes corona wire and collecting polar plate, slurry pool is provided with below the gas approach, the smoke outlet sets cyclone separator；The denitrification apparatus is sequentially provided with smoke inlet along flow of flue gas direction, sprays ammonia part, catalyst module, and exhanst gas outlet, and what the catalyst module included glass-ceramic fiber base material and dipping contains V2O5, WO3, TiO2, MoO3And CeO2Mixture.The spray thrower, which amounts to, three layers, and gas liquid ratio can be set as 1:15.Pallet is provided between the spray thrower and gas approach, the pallet is the sieve plate of horizontal, and Ball-type packing is provided with the sieve plate.The Ball-type packing is plastic filler ball.The uniform flow grid being made up of gusset horizontally arranged at regular intervals are set below the spray thrower, and multilayer can be set in the uniform flow grid, and the gusset position of each adjacent layer is staggeredly arranged.The uniform flow grid have to be homogenized to entering the flue gas stream in demister, further strengthens spraying and dedusting, the effect of desulphurization and denitration.The cyclone separator is multitube cyclone separator.The cyclone separator includes the cyclone cylinder of multiple tangential entries.The cyclone cylinder of the tangential entry includes housing, the inner chamber connected along housing tangential direction, and bottom cone and hopper.The each component mass ratio of dip compound is V in the catalyst module2O510-20%, WO35-10%, TiO220-30%, MoO32-6% and CeO22-6%.Denitration efficiency can be improved 30% by the catalyst module of the application on original efficiency basis.
The operation principle of inventive desulfurization denitrating system is as follows：
During work, flue gas enters desulfurizer 1 by the gas approach 2 of the bottom of desulfurizer 1.The spray thrower 4 that the top of desulfurizer 1 is set sprays the alkaline substance solution of atomization, the flue gas for entering and ramping up from gas approach is sprayed, the SO in the alkaline substance solution and flue gas of spray2Fallen into after generation neutralization reaction generation sulfate in slurry pool 6.Pallet 8 is provided between the spray thrower 4 and gas approach 2, the pallet is the sieve plate of horizontal, and Ball-type packing 9 is provided with the sieve plate.The pressure drop that pallet is produced further promotes the uniformity of smoke distribution, and more good guarantee is provided for uniform contact of gas-liquid of spray thrower scrubbing section.Uniform flow grid can be set below the spray thrower, homogenized to entering the flue gas stream in demister, play a part of further strengthening spraying and dedusting, desulfurization.Flue gas after spray cleaning enters electrostatic precipitator 5.The high efficiency demister is to produce corona discharge using high direct voltage electric forming high pressure non-uniform electric field, makes gas ionization, causes to be dispersed in grit and acid mist in gas and negative ion and meets and charged.Under electric field force effect, receiving electrode is shifted to, so as to reach the purpose of purification gas.Flue gas after above-mentioned processing is discharged from the exhanst gas outlet 3 at the top of demister.The smoke outlet sets cyclone separator 7, and the cyclone separator 7 is multitube cyclone separator.The cyclone separator includes the cyclone cylinder of multiple tangential entries.The cyclone cylinder of the tangential entry includes housing, the inner chamber connected along housing tangential direction, and bottom cone and hopper, as shown in Figure 3.The gas discharged from exhanst gas outlet enters denitrification apparatus, and the denitrification apparatus is sequentially provided with smoke inlet along flow of flue gas direction, sprays ammonia part, catalyst module, and exhanst gas outlet, and what the catalyst module included glass-ceramic fiber base material and dipping contains V2O5, WO3, TiO2, MoO3And CeO2Mixture, each component mass ratio is V in the mixture2O510-20%, WO35-10%, TiO220-30%, MoO32-6% and CeO22-6%.It will be dried and sinter after mixture solution infused ceramic fiberglass substrate containing said components.
Embodiment 1
In minimum discharge system for desulfuration and denitration of the present invention the denitrification catalyst module of denitrification apparatus include glass-ceramic fiber base material and dipping contain V2O5, WO3, TiO2, MoO3And CeO2Mixture, each component mass ratio is V in the mixture2O510%, WO35%, TiO220%, MoO32% and CeO26%.
Embodiment 2
In minimum discharge system for desulfuration and denitration of the present invention the denitrification catalyst module of denitrification apparatus include glass-ceramic fiber base material and dipping contain V2O5, WO3, TiO2, MoO3And CeO2Mixture, each component mass ratio is V in the mixture2O520%, WO310%, TiO230%, MoO36% and CeO24%.
Embodiment 3
In minimum discharge system for desulfuration and denitration of the present invention the denitrification catalyst module of denitrification apparatus include glass-ceramic fiber base material and dipping contain V2O5, WO3, TiO2, MoO3And CeO2Mixture, each component mass ratio is V in the mixture2O515%, WO37.5%, TiO225%, MoO34% and CeO22%.
Embodiment 4
Denitrification catalyst module as described in Example 1, is wherein described V2O515%, WO37.5%.
Embodiment 5
Denitrification catalyst module as described in Example 1, is wherein described WO37.5%, TiO230%.
Embodiment 6
Denitrification catalyst module as described in Example 2, is wherein described TiO225%, MoO34%.
Embodiment 7
Denitrification catalyst module as described in Example 2, is wherein described MoO34%, CeO22%.
Embodiment 8
Denitrification catalyst module as described in Example 3, is wherein described V2O518%, WO36%, TiO223%, MoO35% and CeO23%.
Embodiment 9
Denitrification catalyst module as described in Example 3, is wherein described V2O512%, WO38%, TiO228%, MoO33% and CeO25%.
Embodiment 10
Denitrification catalyst module as described in Example 9, is wherein described V2O515%, WO36%, TiO222%, MoO36% and CeO22%.
Described above is only some embodiments of the present invention; it should be understood that; it can be subject to some changes not departing from the scope of the present invention for those skilled in the art; therefore the structure shown in described above included and accompanying drawing should be regarded as exemplary, and it is not used to limit the protection domain of patent of the present invention.
Claims (9)
1. a kind of minimum discharge system for desulfuration and denitration, it is characterised in that according to production process successively
Including desulfurizer and denitrification apparatus, the desulfurizer bottom is provided with gas approach, and top is opened
There is exhanst gas outlet, the desulfurizer top is provided with least one layer of spray thrower, the spray thrower
Side is provided with electrostatic precipitator, and the electrostatic precipitator includes corona wire and collecting polar plate, the cigarette
Slurry pool is provided with below gas import, the smoke outlet sets cyclone separator；The denitration
Device is sequentially provided with smoke inlet along flow of flue gas direction, sprays ammonia part, catalyst module, and
Exhanst gas outlet, the catalyst module include glass-ceramic fiber base material and dipping contain V2O5,
WO3, TiO2, MoO3And CeO2Mixture.
2. minimum discharge system for desulfuration and denitration according to claim 1, it is characterised in that institute
Stating spray thrower and amounting to has three layers.
3. minimum discharge desulphurization system according to claim 1, it is characterised in that the spray
Drench between device and gas approach and be provided with pallet, the pallet is the sieve plate of horizontal, in the sieve plate
Ball-type packing is provided with above.
4. minimum discharge desulphurization system according to claim 3, it is characterised in that the ball
Shape filler is plastic filler ball.
5. minimum discharge desulphurization system according to claim 1, it is characterised in that the spray
Drench the uniform flow grid for setting and being made up of gusset horizontally arranged at regular intervals below device, the uniform flow grid
Settable multilayer, the gusset position of each adjacent layer is staggeredly arranged.
6. minimum discharge system for desulfuration and denitration according to claim 1, it is characterised in that institute
State multitube cyclone separator.
7. minimum discharge system for desulfuration and denitration according to claim 1, it is characterised in that institute
Stating cyclone separator includes the cyclone cylinder of multiple tangential entries.
8. minimum discharge system for desulfuration and denitration according to claim 7, it is characterised in that institute
Stating the cyclone cylinder of tangential entry includes housing, the inner chamber connected along housing tangential direction, and under
Portion's cone and hopper.
9. minimum discharge system for desulfuration and denitration according to claim 1, it is characterised in that institute
The each component mass ratio for stating dip compound in catalyst module is V2O510-20%, WO3
5-10%, TiO220-30%, MoO32-6% and CeO22-6%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610069735.9A CN107020005A (en) | 2016-02-01 | 2016-02-01 | A kind of minimum discharge system for desulfuration and denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610069735.9A CN107020005A (en) | 2016-02-01 | 2016-02-01 | A kind of minimum discharge system for desulfuration and denitration |
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| Publication Number | Publication Date |
|---|---|
| CN107020005A true CN107020005A (en) | 2017-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610069735.9A Pending CN107020005A (en) | 2016-02-01 | 2016-02-01 | A kind of minimum discharge system for desulfuration and denitration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789929A (en) * | 2017-12-19 | 2018-03-13 | 湖南碧绿环保产业发展有限公司 | One kind rule stream packed bed rule stream phase change device |
| CN109925877A (en) * | 2019-04-03 | 2019-06-25 | 四川大学 | A kind of ceramic kiln flue gas multiple pollutant collaboration governing system |
| CN114699888A (en) * | 2022-04-01 | 2022-07-05 | 北京化工大学 | Sulfur-containing tail gas desulfurization system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252231A (en) * | 2013-05-02 | 2013-08-21 | 易能(中国)环保科技有限公司 | Denitration catalyst and preparation method thereof |
| CN204502755U (en) * | 2015-03-31 | 2015-07-29 | 武汉钢铁(集团)公司 | A kind of wet method removes the device of sulfur dioxide in flue gas and nitrogen oxide |
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2016
- 2016-02-01 CN CN201610069735.9A patent/CN107020005A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252231A (en) * | 2013-05-02 | 2013-08-21 | 易能(中国)环保科技有限公司 | Denitration catalyst and preparation method thereof |
| CN204502755U (en) * | 2015-03-31 | 2015-07-29 | 武汉钢铁(集团)公司 | A kind of wet method removes the device of sulfur dioxide in flue gas and nitrogen oxide |
Non-Patent Citations (1)
| Title |
|---|
| 刘建民等: "《火电厂氮氧化物控制技术》", 31 December 2012, 中国电力出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789929A (en) * | 2017-12-19 | 2018-03-13 | 湖南碧绿环保产业发展有限公司 | One kind rule stream packed bed rule stream phase change device |
| CN109925877A (en) * | 2019-04-03 | 2019-06-25 | 四川大学 | A kind of ceramic kiln flue gas multiple pollutant collaboration governing system |
| CN114699888A (en) * | 2022-04-01 | 2022-07-05 | 北京化工大学 | Sulfur-containing tail gas desulfurization system and method |
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