CN105833693A - Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process - Google Patents
Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process Download PDFInfo
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- CN105833693A CN105833693A CN201610396184.7A CN201610396184A CN105833693A CN 105833693 A CN105833693 A CN 105833693A CN 201610396184 A CN201610396184 A CN 201610396184A CN 105833693 A CN105833693 A CN 105833693A
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- ammonia
- tower body
- gypsum
- limestone
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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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
- B01D53/502—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 solution or suspension
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- B01D53/74—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
- B01D53/8628—Processes characterised by a specific catalyst
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention relates to the technical field of atmospheric pollution treatment, in particular to a device for serial desulfurization and denitrification with a limestone-gypsum process and an SCR (selective catalytic reduction) process. The device comprises a denitrification and deacidification tower, a gypsum bin, an oxidation fan, a lime slurry tank, an ammonia-air mixer, an ammonia water tank, an ammonia water evaporator and a dilution fan. The denitrification and deacidification tower comprises a tower body, a slurry pool is arranged at the bottom of the tower body, a flue gas inlet is arranged on the tower body above the slurry pool, a deacidification sprayer, an ammonia injection grid and an SCR catalyst are arranged in the tower body over the flue gas inlet, and a flue gas outlet is arranged at the top of the tower body. Desulfurization and denitrification can be realized in the same device at the same time, the desulfurization and denitrification tower is simplified, overlapping investment is avoided, operating cost is lowered, and the device is simple to operate, reliable and stable.
Description
Technical field
The present invention relates to atmosphere pollution processing technology field, a kind of limestone-gypsum method and the device of SCR method series connection desulphurization denitration.
Background technology
In recent years, along with the development of science and technology, no matter it is that domestic or external engineers and technicians are inquiring into novel flue gas removing sulfuldioxide.
Limestone-gypsum method flue gas desulfurization is to use lime stone or the method for lime slurry removing sulfur dioxide in flue gas.Limestone-gypsum method technical maturity, absorbent low price and also be readily obtained, calcium sulfur ratio is relatively low, and desulfuration efficiency can be more than 95%.
SCR technology i.e. selective catalytic reduction, under the catalytic action of metallic reducing agent, is reduced into a kind of method of N2 and H2O with NH3 as reducing agent by NOx.SCR technology comparative maturity, secondary pollution is smaller, and flue gas need not heat and just can obtain higher purification efficiency, and removal efficiency can reach about 80%.
If able to just limestone-gypsum method flue gas desulfurization is integrated with SCR denitration technical combinations, it will be possible to ensure that the clearance of SO2, NO2, again can Simplified flowsheet and equipment.
Summary of the invention
It is an object of the invention to provide a kind of limestone-gypsum method and the device of SCR method series connection desulphurization denitration, it is overall by limestone-gypsum method flue gas desulfurization and SCR denitration technical combinations, both can ensure that the clearance of SO2, NO2, again can Simplified flowsheet and equipment, and compact conformation, accessory substance are few, construction cost and operating cost low.
The technical scheme realizing above-mentioned purpose is: a kind of limestone-gypsum method and the device of SCR method series connection desulphurization denitration, it is characterized in that: include denitration extracting tower, gypsum storehouse, oxidation fan, limestone slurry case, ammonia sky blender, ammonia water tank, ammoniacal liquor evaporimeter and dilution air, described denitration extracting tower includes tower body, the bottom of tower body is slurry pool, it is provided with gas approach on tower body above slurry pool, depickling spray thrower it is disposed with from bottom to top in tower body above gas approach, ammonia-spraying grid and SCR catalyst, the top of tower body is provided with exhanst gas outlet, described slurry pool is connected with depickling spray thrower by circulating pump；Limestone slurry case is connected with slurry pool by slurry feeding pump, and described oxidation fan is connected with slurry pool, and slurry pool connects gypsum storehouse also by excavationg pump；Ammonia water tank is connected with ammoniacal liquor evaporimeter by water-delivery pump, and ammoniacal liquor evaporimeter and dilution air connect the input of ammonia sky blender respectively, and the output of ammonia sky blender connects ammonia-spraying grid.
Further, gypsum cyclone and vacuum belt dewaterer also it have been sequentially connected in series between described excavationg pump connection gypsum storehouse.
Preferably, also it is also equipped with in the tower body between described depickling spray thrower and ammonia-spraying grid washing demister, in the tower body between described ammonia-spraying grid and SCR catalyst, is also equipped with ammonia cigarette blender.
The course of work of the present invention is: former flue gas enters denitration extracting tower from air inlet import, lime stone slurry is stored in limestone slurry case, the slurry pool bottom denitration extracting tower is squeezed into by slurry feeding pump, by oxidation fan, slurry pool is carried out oxygen supply simultaneously, lime white is transported to depickling spray thrower and sprays by circulating pump, former flue gas and top-down lime white form reverse flow, and then remove the SO2 of flue gas.
Depickling generation CaSO3 enters at the bottom of tower, the air oxygen chemical conversion CaSO4 that oxidized blower fan blasts, and then generates gypsum, and gypsum is sent into gypsum cyclone, vacuum belt dewaterer thickening, rear feeding gypsum storehouse up to standard by excavationg pump.
After depickling, flue gas washes away, through washing demister, the mist pearl carried in flue gas, and flue gas continues to rise.Ammoniacal liquor in tank used for storing ammonia is caused evaporimeter by water-delivery pump, and ammoniacal liquor is evaporated to ammonia in evaporimeter, and the air that ammonia is sent here with dilution air enters ammonia air mixer and is diluted mixing, and is ejected into tower by ammonia-spraying grid.Ammonia sky mixed gas mixes in tower with flue gas.
Ammonia cigarette blender, it is ensured that flue gas is sufficiently mixed with ammonia, ammonia cigarette mixed gas flows through Catalytic Layer, after removing the NOx of flue gas, discharges from exhanst gas outlet.
Beneficial effects of the present invention:
(1) the recyclable sale of the product of limestone-gypsum method, reduces processing cost, and achieves the harmless discharge of flue gas.
(2) present invention can realize desulphurization and denitration the most simultaneously, simplifies desulphurization and denitration tower, it is to avoid overlapping investment, reduces operating cost, and simple to operate, reliable and stable.
(3) using limestone-gypsum method, SO2 is efficiently removed by flue gas from bottom to top, it is possible to decrease the SO2 murder by poisoning to catalyst, improves the service life of catalyst, is removed by NOx by SCR catalyst.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention includes denitration extracting tower 1, gypsum storehouse 2, oxidation fan 3, limestone slurry case 4, ammonia sky blender 5, ammonia water tank 6, ammoniacal liquor evaporimeter 7 and dilution air 8, denitration extracting tower 1 includes tower tower body 9, the bottom of tower body 9 is slurry pool 10, it is provided with gas approach 11 on tower body 9 above slurry pool 10, depickling spray thrower 12 it is disposed with from bottom to top in tower body 9 above gas approach 11, washing demister 13, ammonia-spraying grid 14, ammonia cigarette blender 15 and SCR catalyst 16, the top of tower body 9 is provided with exhanst gas outlet 17, slurry pool 10 is connected with depickling spray thrower 12 by circulating pump 18.
Limestone slurry case 4 is connected with slurry pool 10 by slurry feeding pump 19, oxidation fan 3 is connected with slurry pool 10, slurry pool 10 connects gypsum storehouse 2 also by excavationg pump 20, and excavationg pump 20 connects and has also been sequentially connected in series gypsum cyclone 21 and vacuum belt dewaterer 22 between gypsum storehouse 2.
Ammonia water tank 6 is connected with ammoniacal liquor evaporimeter 7 by water-delivery pump 23, and ammoniacal liquor evaporimeter 7 and dilution air 8 connect the input of ammonia sky blender 5 respectively, and the output of ammonia sky blender 5 connects ammonia-spraying grid 14.
Claims (3)
1. a limestone-gypsum method and the device of SCR method series connection desulphurization denitration, it is characterized in that: include denitration extracting tower, gypsum storehouse, oxidation fan, limestone slurry case, ammonia sky blender, ammonia water tank, ammoniacal liquor evaporimeter and dilution air, described denitration extracting tower includes tower body, the bottom of tower body is slurry pool, it is provided with gas approach on tower body above slurry pool, depickling spray thrower it is disposed with from bottom to top in tower body above gas approach, ammonia-spraying grid and SCR catalyst, the top of tower body is provided with exhanst gas outlet, described slurry pool is connected with depickling spray thrower by circulating pump；Limestone slurry case is connected with slurry pool by slurry feeding pump, and described oxidation fan is connected with slurry pool, and slurry pool connects gypsum storehouse also by excavationg pump；Ammonia water tank is connected with ammoniacal liquor evaporimeter by water-delivery pump, and ammoniacal liquor evaporimeter and dilution air connect the input of ammonia sky blender respectively, and the output of ammonia sky blender connects ammonia-spraying grid.
A kind of limestone-gypsum method the most according to claim 1 and the device of SCR method series connection desulphurization denitration, it is characterised in that: the connection of described excavationg pump has also been sequentially connected in series gypsum cyclone and vacuum belt dewaterer between gypsum storehouse.
A kind of limestone-gypsum method the most according to claim 1 and 2 and the device of SCR method series connection desulphurization denitration, it is characterized in that: be also also equipped with in the tower body between described depickling spray thrower and ammonia-spraying grid washing demister, in the tower body between described ammonia-spraying grid and SCR catalyst, be also equipped with ammonia cigarette blender.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396184.7A CN105833693A (en) | 2016-06-07 | 2016-06-07 | Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610396184.7A CN105833693A (en) | 2016-06-07 | 2016-06-07 | Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process |
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| CN105833693A true CN105833693A (en) | 2016-08-10 |
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| CN201610396184.7A Pending CN105833693A (en) | 2016-06-07 | 2016-06-07 | Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786403A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of Benitration reactor and denitration sulfur method |
| CN110479090A (en) * | 2019-08-19 | 2019-11-22 | 广东佳德环保科技有限公司 | A kind of energy-saving desulfuring and denitrifying apparatus of flue gas |
| CN115006988A (en) * | 2022-07-06 | 2022-09-06 | 河南城建学院 | Desulfurization and denitrification dust removal device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768132A (en) * | 1994-06-17 | 1995-03-14 | Chiyoda Corp | Desulfurizing and denitrifying method |
| CN203061060U (en) * | 2012-11-29 | 2013-07-17 | 王漫 | Ammonia-method desulfurization and denitration integrated device |
| CN203507793U (en) * | 2013-11-06 | 2014-04-02 | 安徽同兴环保工程股份有限公司 | Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas |
| 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 |
-
2016
- 2016-06-07 CN CN201610396184.7A patent/CN105833693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768132A (en) * | 1994-06-17 | 1995-03-14 | Chiyoda Corp | Desulfurizing and denitrifying method |
| CN203061060U (en) * | 2012-11-29 | 2013-07-17 | 王漫 | Ammonia-method desulfurization and denitration integrated device |
| CN203507793U (en) * | 2013-11-06 | 2014-04-02 | 安徽同兴环保工程股份有限公司 | Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786403A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of Benitration reactor and denitration sulfur method |
| CN108786403B (en) * | 2017-05-02 | 2021-08-31 | 中国石油化工股份有限公司 | Denitration reactor and denitration and desulfurization method |
| CN110479090A (en) * | 2019-08-19 | 2019-11-22 | 广东佳德环保科技有限公司 | A kind of energy-saving desulfuring and denitrifying apparatus of flue gas |
| CN115006988A (en) * | 2022-07-06 | 2022-09-06 | 河南城建学院 | Desulfurization and denitrification dust removal device |
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Application publication date: 20160810 |