CN112915754A - Sulfur and nitrate integrated deacidification and dedusting flue gas purification method and device - Google Patents

Sulfur and nitrate integrated deacidification and dedusting flue gas purification method and device Download PDF

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Publication number
CN112915754A
CN112915754A CN202110140110.8A CN202110140110A CN112915754A CN 112915754 A CN112915754 A CN 112915754A CN 202110140110 A CN202110140110 A CN 202110140110A CN 112915754 A CN112915754 A CN 112915754A
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chamber
flue gas
cyclone
tower
cavity
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CN202110140110.8A
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翁坚
丁恩振
郭俊泽
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Hefei Zhongke Yuanwang Environmental Protection Technology Co ltd
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Hefei Zhongke Yuanwang Environmental Protection Technology Co ltd
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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
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/102—Oxygen
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Dispersion Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a sulfur and nitrate integrated deacidification and dedusting flue gas purification method and a device, wherein SOx and NO in flue gas are simultaneously removed in a mode of arranging flue gas cyclone pressurization and refrigerant cooling in the deviceXAnd dust and the like. Flue gas purification device is from last to including whirlwind tower, whirlwind reinforcing tower, gas purification cavity and collection water tank down respectively, the whirlwind tower is equipped with flue gas cavity, refrigerant cavity and swirl chamber, whirlwind reinforcing tower is equipped with compressed air cavity, refrigerant cavity and swirl reinforcing chamber, flue gas cavity and swirl chamber be equipped with one or more tangential and run through the trachea, compressed air cavity and swirl reinforcing chamber be equipped with one or more tangential and run through the trachea, swirl chamber, swirl reinforcing chamberThe enhancement chamber, the purified gas chamber and the water collection tank are communicated with each other. The flue gas purification device designed by the invention has the advantages of simple structure, small occupied area, high purification efficiency, no need of adding materials such as a catalyst, a reducing agent and the like, low flue gas purification cost and good application scene.

Description

Sulfur and nitrate integrated deacidification and dedusting flue gas purification method and device
Technical Field
The invention belongs to the field of flue gas desulfurization, denitrification and purification, and particularly relates to a flue gas purification method by integrally deacidifying and dedusting sulfur and nitrate.
Technical Field
Along with the development of economic society of China, the national attention on environment is stronger and stronger, wherein nitrogen oxides and sulfur dioxide are main emissions in industrial production tail gas and have great harm to the environment. At present, the SOx removal technology mainly comprises an ammonia method, a lime-gypsum method, a sodium-alkali method and the like, and NOXThe removal technology comprises a dry method, a wet method, an adsorption method, a high-energy plasma oxidation method and the like. The main dry process technologies, namely a selective catalytic reduction method (SCR), a selective non-catalytic reduction method (SNCR) and an SCR-SNCR mixed reduction method, are the most widely applied methods in the current industrialization, and the methods have the disadvantages of high construction cost, complex equipment, high operation cost, high material consumption, low removal efficiency and serious secondary pollution. The invention designs a sulfur and nitrate integrated deacidification and dedusting flue gas purification method and a device, which can simultaneously remove SOx and NO in flue gas by arranging flue gas cyclone pressurization and refrigerant cooling modes in the deviceXAnd dust and the like. The flue gas rotates at a high speed under the boosting of tangential high-pressure compressed air in the cyclone chamber through the tangential air nozzle, so that the flue gas pressure of 0.5-2 MPa can be formed, and the strong centrifugal force is accompanied with the condensation of low-temperature refrigerants, so that SOx and NO are enabled to be in contact with the condensation of low-temperature refrigerantsXAnd pollutants such as dust and the like are attached to the inner wall of the cyclone chamber and form grey water together with condensed water to enter a collecting water tank at the lower part. NO under cooling and pressurizing conditionsXGeneration of HNO3Dissolved in water, SO2Generation of H2SO4Dissolved in water, the method can effectively remove SOx and NO in the flue gasXDust and other pollutants, and the method is used for removing HCL and H2Acid gases such as S are equally effective.
Disclosure of Invention
Aiming at the defects of the existing industrial flue gas treatment device, the invention provides a sulfur and nitrate integrated deacidification and dedusting flue gas purification method and device, which can remove SOx and NO in flue gas by adopting condensation and cyclone pressure increasing technologyXAnd dust and other pollutants can be effectively purified without adding catalyst, reducing agent and other consumables, and the exhaust gas can reach the standard emissionThe purpose of (1).
In order to achieve the purpose, the invention adopts the following technical scheme:
a method and a device for purifying flue gas by removing acid and dust integrally with sulfur and nitrate are disclosed, wherein the method simultaneously removes SOx and NO in the flue gas by arranging modes of flue gas cyclone pressurization and refrigerant cooling in the deviceXAnd dust and the like. Flue gas purification device is from last to including whirlwind tower, whirlwind reinforcing tower, gas purification cavity and collection water tank down respectively, the whirlwind tower is equipped with gas cavity, refrigerant cavity and swirl chamber, the whirlwind reinforcing tower is equipped with compressed air chamber, refrigerant cavity and swirl reinforcing chamber, gas cavity and swirl chamber be equipped with one or more tangential and run through the trachea, compressed air chamber and swirl reinforcing chamber be equipped with one or more tangential and run through the trachea, swirl chamber, swirl reinforcing chamber, gas purification cavity and collection water tank UNICOM each other.
The method simultaneously removes SOx and NO in the flue gas by arranging flue gas cyclone in the device to increase pressurization and cool the refrigerantXAnd dust and the like.
The flue gas purification device comprises a cyclone tower, a cyclone enhancement tower, a purification air cavity and a collection water tank from top to bottom.
The cyclone tower is provided with a flue gas chamber, a refrigerant chamber and a cyclone chamber.
The cyclone enhancement tower is provided with a compressed air chamber, a refrigerant chamber and a cyclone enhancement chamber, and the cyclone chamber, the cyclone enhancement chamber, the purified air chamber and the water collection tank are communicated with each other.
The flue gas chamber and the cyclone chamber are provided with one or more tangential through gas pipes, the compressed air chamber and the cyclone enhancement chamber are provided with one or more tangential through gas pipes, and the pressure of the inner wall of the cyclone enhancement chamber can reach 0.12MPa to 0.25 MPa.
The temperature of the cooling liquid in the cooling medium chamber is between 10 ℃ below zero and 10 ℃.
The flue gas desulfurization and denitration principle is as follows:
4NO+2H2O+3O2→4HNO3
4NO2+2H2O+O2→4HNO3
2SO2+2H2O+O2→2H2SO4
drawings
FIG. 1 is a schematic view of a flue gas purification device for integrated deacidification and dedusting of sulfur and nitrate;
1. flue gas entry, 2, flue gas cavity, 3, the tangential tuyere that runs through, 4, refrigerant cavity, 5, compression mouth gas inlet, 6, compressed air cavity, 7, compressed air tangential through tuber pipe, 8, refrigerant import, 9, refrigerant export, 10, tail gas export, 11, collection basin, 12, basin gas pocket, 13, reserve shower head, 14, swirl chamber, 15, whirl reinforcing chamber, 16, gas purification cavity.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The oil sludge sand is subjected to high-temperature incineration treatment by adopting diesel oil, the generated flue gas is cooled by a cooling tower and then enters a flue gas inlet 1, and the temperature of the flue gas is controlled to be 10-160 ℃.
A refrigerating machine is adopted to provide refrigerant liquid for a refrigerant cavity, the refrigerating temperature is 5 ℃, an air compressor improves compressed air, and the supplementary air flow is 1% of the flue gas flow.
The tail gas outlet is connected with a variable-frequency draught fan.
10 ℃ -160 ℃ flue gas enters a flue gas chamber 2 through a flue gas inlet 1, the flue gas in the flue gas chamber 2 enters a cyclone chamber through a tangential penetration tuyere 3, and the flue gas rotates downwards at 40 degrees in the cyclone chamber along the inner wall in a tangential manner.
Compressed air enters the compressed air chamber through the inlet 5, penetrates through the air pipe in the tangential direction of the compressed air to enter the enhancement cyclone chamber, rotates along the tangential direction of the inner wall, and keeps the same direction with the rotation of the flue gas, so that the rotation speed of the flue gas is enhanced. SOx and NO in flue gasXAttached to the inner wall of the chamber in high-speed centrifugal rotation, and generates HNO along with the reaction of condensed water and fresh oxygen3And H2SO4And flows into the lower water tank together with the dust. The purified flue gas is discharged under the action of a draught fan. And spraying appropriate amount of atomized alkali liquor or water from the ton shower head 13 as required. Acidity in water tankThe substance generates salts under the neutralization of alkali.
Selecting two test point pairs of a flue gas inlet and a flue gas outlet respectively by using a flue gas analyzer to obtain CO and O in the flue gas2、NO、NO2And SO2Testing, and treating with a sulfur and nitrate integrated deacidification and dedusting flue gas purification device to obtain SO2The one-step removal rate of the catalyst is 80-99 percent, the one-step removal rate of NO is 50-90 percent, and the NO is2The one-step removal rate is 90-97%.

Claims (7)

1. A sulfur and nitrate integrated deacidification and dedusting flue gas purification method and a device are characterized in that the method simultaneously removes SOx and NO in flue gas by arranging a flue gas cyclone pressurization and refrigerant cooling mode in the deviceXAnd dust and the like. Flue gas purification device is from last to including whirlwind tower, whirlwind reinforcing tower, gas purification cavity and collection water tank down respectively, the whirlwind tower is equipped with gas cavity, refrigerant cavity and swirl chamber, the whirlwind reinforcing tower is equipped with compressed air chamber, refrigerant cavity and whirlwind reinforcing chamber, gas cavity and swirl chamber be equipped with one or more tangential and run through the trachea, compressed air chamber and whirlwind reinforcing chamber be equipped with one or more tangential and run through the trachea, swirl chamber, swirl reinforcing chamber, gas purification cavity and collection water tank UNICOM each other.
2. The method and the device for purifying the flue gas with integrated sulfur and nitrate deacidification and dust removal as claimed in claim 1, wherein the method simultaneously removes SOx and NO in the flue gas by arranging flue gas cyclone pressurization and refrigerant cooling in the deviceXAnd dust and the like.
3. The method and the device for purifying flue gas by integrated deacidification and dedusting of sulfur and nitrate according to claim 1, wherein the flue gas purifying device comprises a cyclone tower, a cyclone strengthening tower, a purified gas chamber and a collecting water tank respectively from top to bottom.
4. The method and the device for purifying the flue gas with the integrated deacidification and the dedusting functions of the sulfur and the nitrate according to claim 1, wherein the cyclone tower is provided with a flue gas chamber, a refrigerant chamber and a cyclone chamber.
5. The method and the device for purifying the flue gas by the integrated deacidification and dedusting of the sulfur and the nitre as claimed in claim 1, wherein the cyclone reinforcement tower is provided with a compressed air chamber, a refrigerant chamber and a cyclone reinforcement chamber, and the cyclone chamber, the cyclone reinforcement chamber, the purified gas chamber and the water collection tank are communicated with each other.
6. The method and the device for purifying the flue gas by deacidifying and dedusting the sulfur and the nitre integrally according to the claim 2, wherein one or more tangential through gas pipes are arranged in the flue gas chamber and the cyclone chamber, one or more tangential through gas pipes are arranged in the compressed air chamber and the cyclone enhancement chamber, and the gas pressure on the inner wall of the cyclone enhancement chamber can reach 0.12MPa to 0.25 MPa.
7. The method and the device for purifying the flue gas by the integrated deacidification and the dedusting of the sulfur and the nitre according to the claim 2, wherein the temperature of the cooling liquid in the cooling medium chamber is between 10 ℃ below zero and 10 ℃.
CN202110140110.8A 2021-02-01 2021-02-01 Sulfur and nitrate integrated deacidification and dedusting flue gas purification method and device Withdrawn CN112915754A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024045696A1 (en) * 2022-08-27 2024-03-07 领航国创(北京)科技集团有限公司 Method for capturing and converting carbon dioxide in industrial flue gas and application

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CN103111173A (en) * 2013-01-21 2013-05-22 江汉大学 Flue gas purification system and method thereof
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CN106352364A (en) * 2016-10-18 2017-01-25 中国石油化工股份有限公司 Integrated method and integrated device for catalytic cracking, flue gas incineration and heat exchange separation
CN205965469U (en) * 2016-06-30 2017-02-22 华东理工大学 Recovery remove device of high concentration hydrogen sulfide gas body
CN106669395A (en) * 2017-01-09 2017-05-17 张波 Coke oven flue gas desulfurization and denitrification integrated device and coke oven flue gas desulfurization and denitrification technology
WO2018191906A1 (en) * 2017-04-20 2018-10-25 江苏申江环境科技有限公司 Waste gas recovery, treatment and conversion system apparatus
CN111167284A (en) * 2020-01-02 2020-05-19 金陵科技学院 Industrial flue gas ozone and hydrogen peroxide oxidative decomposition denitration device and use method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5043042A (en) * 1973-08-21 1975-04-18
CN2495374Y (en) * 2001-06-29 2002-06-19 青岛化工学院 Dual tangential circulating flow type cyclone dust remover
CN101664634A (en) * 2009-09-18 2010-03-10 天津渤海化工有限责任公司天津碱厂 Flue gas desulfurization process by ammonia method
CN102344138A (en) * 2010-07-08 2012-02-08 气体产品与化学公司 Removal of sox from compressed oxyfuel-derived co2
CN202179925U (en) * 2011-06-29 2012-04-04 北京国电清新环保技术股份有限公司 Integrated purification device of desulfurization and denitrification flue gas
CN102350197A (en) * 2011-07-11 2012-02-15 华东理工大学 Fume desulfurizing and denitrifying device based on magnesia and method
CN102489129A (en) * 2011-12-14 2012-06-13 山东中玻节能环保发展有限公司 Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof
CN103111173A (en) * 2013-01-21 2013-05-22 江汉大学 Flue gas purification system and method thereof
CN105664684A (en) * 2016-01-15 2016-06-15 上海理工大学 Method for removing SO2 and NO in oxygen-enriched combustion flue gas at high pressure and device thereof
CN205965469U (en) * 2016-06-30 2017-02-22 华东理工大学 Recovery remove device of high concentration hydrogen sulfide gas body
CN106352364A (en) * 2016-10-18 2017-01-25 中国石油化工股份有限公司 Integrated method and integrated device for catalytic cracking, flue gas incineration and heat exchange separation
CN106669395A (en) * 2017-01-09 2017-05-17 张波 Coke oven flue gas desulfurization and denitrification integrated device and coke oven flue gas desulfurization and denitrification technology
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CN111167284A (en) * 2020-01-02 2020-05-19 金陵科技学院 Industrial flue gas ozone and hydrogen peroxide oxidative decomposition denitration device and use method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024045696A1 (en) * 2022-08-27 2024-03-07 领航国创(北京)科技集团有限公司 Method for capturing and converting carbon dioxide in industrial flue gas and application

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