CN111265991A - Flue gas deacidification purification device for waste incineration power generation - Google Patents

Flue gas deacidification purification device for waste incineration power generation Download PDF

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Publication number
CN111265991A
CN111265991A CN201811477679.8A CN201811477679A CN111265991A CN 111265991 A CN111265991 A CN 111265991A CN 201811477679 A CN201811477679 A CN 201811477679A CN 111265991 A CN111265991 A CN 111265991A
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CN
China
Prior art keywords
cooling tower
absorption cooling
gas
communicated
flue gas
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Withdrawn
Application number
CN201811477679.8A
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Chinese (zh)
Inventor
莫云辉
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Guilin Hongtai Farming Farmers Professional Cooperative
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Guilin Hongtai Farming Farmers Professional Cooperative
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Publication date
Application filed by Guilin Hongtai Farming Farmers Professional Cooperative filed Critical Guilin Hongtai Farming Farmers Professional Cooperative
Priority to CN201811477679.8A priority Critical patent/CN111265991A/en
Publication of CN111265991A publication Critical patent/CN111265991A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1418—Recovery of products
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1456—Removing acid components
    • 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
    • B01D53/507—Sulfur oxides by treating the gases with other liquids
    • 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B01D2257/2045—Hydrochloric acid
    • 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
    • B01D2258/0291—Flue gases from waste incineration plants

Abstract

The invention discloses a flue gas deacidification purification device for waste incineration power generation, which comprises an oxygen-enriched coal-fired boiler, wherein a bag-type dust collector gas outlet pipeline on a flue gas outlet pipe of the oxygen-enriched coal-fired boiler is communicated with a first gas absorption cooling tower through an induced draft fan, a gas outlet pipe of the first gas absorption cooling tower is communicated with a gas inlet pipe of a second gas absorption cooling tower sequentially through a first air compressor and a first cooler, a gas outlet pipe of the second gas absorption cooling tower is communicated with a gas inlet pipe of a third gas absorption cooling tower sequentially through a second air compressor and a second cooler, a gas outlet pipe of the third gas absorption cooling tower is communicated with a gas inlet of a TEG dehydration device through the induced draft fan, and a gas outlet pipe of the TEG dehydration device is communicated with a high-pressure pump sequentially through the third air compressor and the third cooler. This gas deacidification purifier's deacidification is effectual, effectively avoids the secondary pollution that the burning caused.

Description

Flue gas deacidification purification device for waste incineration power generation
Technical Field
The invention belongs to the technical field of clean energy, and particularly relates to a flue gas deacidification purification device for waste incineration power generation.
Background
Clean energy, i.e., green energy, refers to energy that does not emit pollutants and can be directly used for production and living, and includes nuclear energy and "renewable energy". Renewable energy refers to energy sources which can be regenerated by raw materials, such as hydroelectric power generation, wind power generation, solar energy, biological energy (biogas), geothermal energy (including ground sources and water sources) and sea tide energy. Renewable energy sources do not have the possibility of energy exhaustion, so the development and utilization of renewable energy sources are increasingly paid attention by many countries, especially the countries with energy shortage.
Domestic waste incineration power generation is receiving more and more attention as clean energy, but smoke generated by waste incineration not only has foul smell, but also contains SOX、NOXSecondary pollutants such as HCl, particle dust, heavy metals and dioxin known as century toxicity cause great harm to the environment and seriously affect the daily life and the personal health of people around. For many years, many researchers and research institutes have been working on development and innovation of waste incineration technology and flue gas purification process, and although the conventional waste incineration power station has adopted advanced, complicated and expensive flue gas treatment equipment, it still faces serious secondary pollution problems. How to effectively solve the problem of secondary pollution in the waste incineration process becomes the key for popularization and application of the waste incineration technology.
Disclosure of Invention
The invention aims to provide a flue gas deacidification purification device for waste incineration power generation, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a flue gas deacidification purifier of msw incineration power generation, includes oxygen boosting coal fired boiler, oxygen boosting coal fired boiler's exhanst gas outlet passes through the air inlet of pipeline and sack cleaner and switches on mutually, the sack cleaner pipeline of giving vent to anger switches on mutually through draught fan and first gaseous absorption cooling tower, the outlet duct of first gaseous absorption cooling tower loops through the intake pipe of first air compressor and first cooler and second gaseous absorption cooling tower and switches on mutually, the outlet duct of second gaseous absorption cooling tower loops through the intake pipe of second air compressor and second cooler and third gaseous absorption cooling tower and switches on mutually, the outlet duct of third gaseous absorption cooling tower passes through the draught fan and switches on mutually with TEG dewatering device's air inlet, TEG dewatering device's outlet duct loops through third air compressor and third cooler and switches on mutually with the high-pressure pump, the inside of first gaseous absorption cooling tower, second gaseous absorption cooling tower and third gaseous absorption cooling tower all is equipped with a spray pipe and two perpendicular arrangement's spray pipe, and the bottom of three tower all is equipped with the acid fluid discharging pipe, the outlet pipe of acid fluid discharging pipe and the water inlet of shunt switch on mutually, a delivery port of shunt has circulating water pump through the pipe connection, and circulating water pump's delivery port is through fourth cooler and spray pipe switch on mutually.
Preferably, a combustion fly ash outlet at the bottom of the bag-type dust collector is communicated with the fly ash storage box.
Preferably, the other water outlet of the flow divider is communicated with the acid liquor collecting tank through a pipeline.
Preferably, a plurality of liquid spraying nozzles are horizontally arranged on the liquid spraying pipe.
Preferably, the liquid inlets of the two water spray pipes are respectively communicated with the liquid outlet of a three-way valve outside the gas absorption tower, the liquid inlet of the three-way valve is communicated with the water outlet of a cooling water source, and a water pump is arranged on a liquid inlet pipeline of the three-way valve.
Preferably, the bottoms of the inner cavities of the first gas absorption cooling tower, the second gas absorption cooling tower and the third gas absorption cooling tower are also provided with an air flow distributor, and an air inlet of the air flow distributor is communicated with an air inlet pipeline of the absorption cooling tower.
Preferably, a plurality of water nozzles are horizontally arranged on the water spray pipe.
The invention has the technical effects and advantages that: this flue gas deacidification purifier of msw incineration electricity generation for the flue gas that oxygen boosting coal fired boiler produced passes through first gas absorption cooling tower respectively, behind second gas absorption cooling tower and the third gas absorption cooling tower, through the effect of cooling water, through spray pipe spun cooling water and flue gas contact, can accomplish hydrochloric acid in the flue gas, sulfur dioxide and nitric oxide's desorption task, the flue gas gets into from three absorption tower bottoms, upward flow, the acidizing fluid of circulation loop passes through circulating water pump and cooler and pours into the downflow into from the top of the tower through the spray pipe, the two fully contacts and takes place the reaction. The purified flue gas is discharged from the top of the tower and enters the next process, the acid liquor after acid absorption is discharged from the bottom of the tower to the acid liquor collecting box, and no additional chemical agent is needed to be added in the process, so that the removal rate is high, the effect is good, the process is simple, and the design is reasonable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a first gas absorption cooling tower according to the present invention;
FIG. 3 is a schematic structural view of a bag-type dust collector of the present invention.
In the figure: 1 oxygen-enriched coal-fired boiler, 2 cloth bag dust collectors, 3 fly ash containing boxes, 4 first gas absorption cooling towers, 5 first air compressors, 6 first coolers, 7 second gas absorption cooling towers, 8 second air compressors, 9 second coolers, 10 third gas absorption cooling towers, 11 TEG dehydration devices, 12 third air compressors, 13 third coolers, 14 high-pressure pumps, 15 liquid spraying pipes, 16 water spraying pipes, 17 acid fluid discharging pipes, 18 flow dividers, 19 circulating water pumps, 20 fourth coolers, 21 acid liquor collecting boxes, 22 air flow distributors, 23 three-way valves and 24 cooling water sources.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a flue gas deacidification purification device for waste incineration power generation, which comprises an oxygen-enriched coal-fired boiler 1, wherein a flue gas outlet of the oxygen-enriched coal-fired boiler 1 is communicated with a gas inlet of a bag-type dust collector 2 through a pipeline, a gas outlet pipeline of the bag-type dust collector 2 is communicated with a first gas absorption cooling tower 4 through an induced draft fan, a gas outlet pipe of the first gas absorption cooling tower 4 is communicated with a gas inlet pipe of a second gas absorption cooling tower 7 sequentially through a first air compressor 5 and a first cooler 6, a gas outlet pipe of the second gas absorption cooling tower 7 is communicated with a gas inlet pipe of a third gas absorption cooling tower 10 sequentially through a second air compressor 8 and a second cooler 9, a gas outlet pipe of the third gas absorption cooling tower 10 is communicated with a gas inlet of a TEG dehydration device 11 sequentially through the induced draft fan, a gas outlet pipe of the TEG dehydration device 11 is communicated with a high-pressure pump 14 sequentially through a third air compressor 12 and a third cooler 13 The first gas absorption cooling tower 4, the second gas absorption cooling tower 7 and the third gas absorption cooling tower 10 are all provided with a liquid spraying pipe 15 and two vertically arranged water spraying pipes 16 inside, the bottoms of the three towers are all provided with an acidic fluid discharging pipe 17, a water outlet pipe of the acidic fluid discharging pipe 17 is communicated with a water inlet of a flow divider 18, a water outlet of the flow divider 18 is connected with a circulating water pump 19 through a pipeline, and a water outlet of the circulating water pump 19 is communicated with the liquid spraying pipe 15 through a fourth cooler 20.
Specifically, a combustion fly ash outlet at the bottom of the bag-type dust collector 2 is communicated with the fly ash storage box 3.
Specifically, the other water outlet of the flow divider 18 is communicated with the acid liquor collecting tank 21 through a pipeline.
Specifically, a plurality of liquid spray nozzles are horizontally arranged on the liquid spray pipe 15.
Specifically, two liquid inlets of the water spraying pipes 16 are respectively communicated with a liquid outlet of a three-way valve 23 outside the gas absorption tower, a liquid inlet of the three-way valve 23 is communicated with a water outlet of a cooling water source 24, and a water pump is arranged on a liquid inlet pipeline of the three-way valve 23.
Specifically, the bottoms of the inner cavities of the first gas absorption cooling tower 4, the second gas absorption cooling tower 7 and the third gas absorption cooling tower 10 are further provided with an airflow uniform distributor 22, and an air inlet of the airflow uniform distributor 22 is communicated with an air inlet pipeline of the absorption cooling tower.
Specifically, a plurality of water nozzles are horizontally arranged on the water spraying pipe 16.
The flue gas deacidification purification device for waste incineration power generation has the advantages that the flue gas which is collected by the bag-type dust collector 1 and fly ash firstly enters the first gas absorption cooling tower 4, a large amount of cooling water is introduced into the tower top, and the flue gas is conveyed from the tower bottomThe hydrogen chloride is extremely soluble in water, the hydrogen chloride gas in the flue gas is removed while the flue gas is cooled, the dilute hydrochloric acid solution containing the hydrogen chloride is discharged from the tower bottom, most of the dilute hydrochloric acid solution is cooled and then recycled into the tower, the flue gas cooled to normal temperature is removed most of water vapor and hydrochloric acid gas, the flue gas is output from the tower top, then the flue gas is sent to a second air compressor 8 for pressurization and is cooled to normal temperature, the flue gas enters a second gas absorption cooling tower 7, the flue gas still enters from the tower bottom and flows upwards, the recycled acid liquid flows from top to bottom in the tower, the two are fully contacted in the tower, and enough time is provided for enabling NO and O in the flue gas to be fully contacted with each other2、SO2And H2O reacts with each other. The dilute sulfuric acid solution discharged from the bottom of the second gas absorption cooling tower 7 is separated by a splitter 18, and most of the dilute sulfuric acid solution is cooled and recycled to the tower to promote SO2The other part of the sulfuric acid product is collected by the acid liquid collecting box 21, the flue gas after the reaction is discharged from the top of the tower, and the SO in the flue gas is discharged at the moment2Has been substantially removed. The desulfurized smoke is sent into the third gas absorption cooling tower 10 after being subjected to pressure boosting and cooling again, and NO and O in the smoke are simultaneously2And H2And the O reacts with each other to generate nitric acid solution. And part of the dilute nitric acid solution discharged from the bottom of the tower is cooled and then circulated back to the absorption tower, so that the reaction heat can be absorbed, the low-temperature environment of the reaction is ensured, the reaction absorption of NO can be promoted, the denitrification efficiency is increased, and the rest part of the dilute nitric acid solution is collected as a nitric acid product.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides a flue gas deacidification purifier of msw incineration electricity generation, includes oxygen boosting coal fired boiler (1), its characterized in that: the gas outlet of oxygen boosting coal fired boiler (1) is put through the air inlet of pipeline and sack cleaner (2) mutually, sack cleaner (2) pipeline of giving vent to anger is put through mutually through draught fan and first gas absorption cooling tower (4), the outlet duct of first gas absorption cooling tower (4) loops through the intake pipe of first air compressor (5) and first cooler (6) and second gas absorption cooling tower (7) and is put through mutually, the outlet duct of second gas absorption cooling tower (7) loops through second air compressor (8) and second cooler (9) and is put through mutually with the intake pipe of third gas absorption cooling tower (10), the outlet duct of third gas absorption cooling tower (10) passes through the draught fan and is put through mutually with the air inlet of TEG dewatering device (11), the outlet duct of TEG dewatering device (11) loops through third air compressor (12) and third cooler (13) and is put through mutually with high-pressure pump (14), the inside of first gaseous absorption cooling tower (4), second gaseous absorption cooling tower (7) and third gaseous absorption cooling tower (10) all is equipped with spray pipe (16) of a spray pipe (15) and two vertical arrangements, and the bottom of three tower all is equipped with acid fluid discharging pipe (17), the outlet pipe of acid fluid discharging pipe (17) and the water inlet of shunt (18) switch on mutually, a delivery port of shunt (18) has circulating water pump (19) through the pipe connection, and the delivery port of circulating water pump (19) is put through with spray pipe (15) through fourth cooler (20).
2. The flue gas deacidification purification device for waste incineration power generation according to claim 1, characterized in that: and a combustion fly ash outlet at the bottom of the bag-type dust collector (2) is communicated with the fly ash storage box (3).
3. The flue gas deacidification purification device for waste incineration power generation according to claim 1, characterized in that: the other water outlet of the flow divider (18) is communicated with the acid liquor collecting box (21) through a pipeline.
4. The flue gas deacidification purification device for waste incineration power generation according to claim 1, characterized in that: and a plurality of liquid spraying nozzles are horizontally arranged on the liquid spraying pipe (15).
5. The flue gas deacidification purification device for waste incineration power generation according to claim 1, characterized in that: liquid inlets of the two water spray pipes (16) are communicated with liquid outlets of three-way valves (23) outside the gas absorption tower respectively, liquid inlets of the three-way valves (23) are communicated with water outlets of cooling water sources (24), and water pumps are arranged on liquid inlet pipelines of the three-way valves (23).
6. The flue gas deacidification purification device for waste incineration power generation according to claim 1, characterized in that: the bottom of the inner cavity of the first gas absorption cooling tower (4), the second gas absorption cooling tower (7) and the third gas absorption cooling tower (10) is also provided with an airflow uniform distributor (22), and the air inlet of the airflow uniform distributor (22) is communicated with the air inlet pipeline of the absorption cooling tower.
7. The flue gas deacidification purification device for waste incineration power generation according to claim 1, characterized in that: a plurality of water nozzles are horizontally arranged on the water spray pipe (16).
CN201811477679.8A 2018-12-05 2018-12-05 Flue gas deacidification purification device for waste incineration power generation Withdrawn CN111265991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811477679.8A CN111265991A (en) 2018-12-05 2018-12-05 Flue gas deacidification purification device for waste incineration power generation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811477679.8A CN111265991A (en) 2018-12-05 2018-12-05 Flue gas deacidification purification device for waste incineration power generation

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113663481A (en) * 2021-09-01 2021-11-19 江苏金牛环保工程设备有限公司 Acid gas incinerator recovery device and use method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113663481A (en) * 2021-09-01 2021-11-19 江苏金牛环保工程设备有限公司 Acid gas incinerator recovery device and use method thereof
CN113663481B (en) * 2021-09-01 2023-12-29 江苏金牛环保工程设备有限公司 Acid gas incinerator recovery device and use method thereof

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Application publication date: 20200612