CN215027580U - Flue gas pretreatment device for capturing carbon dioxide in glass kiln - Google Patents

Flue gas pretreatment device for capturing carbon dioxide in glass kiln Download PDF

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Publication number
CN215027580U
CN215027580U CN202120367061.7U CN202120367061U CN215027580U CN 215027580 U CN215027580 U CN 215027580U CN 202120367061 U CN202120367061 U CN 202120367061U CN 215027580 U CN215027580 U CN 215027580U
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flue gas
waste heat
heat boiler
carbon dioxide
temperature
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CN202120367061.7U
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纪烈勇
刘晓辉
高燕飞
金苏清
孟岩峰
郑肖云
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China National Building Materials Hefei New Energy Resources Co ltd
SHANGHAI TRIUMPH ENERGY CONSERVATION ENGINEERING CO LTD
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SHANGHAI TRIUMPH ENERGY CONSERVATION ENGINEERING CO LTD
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/151Reduction of greenhouse gas [GHG] emissions, e.g. CO2
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The utility model relates to a flue gas pretreatment device for capturing carbon dioxide in a glass kiln, which comprises a waste heat boiler, wherein the outlet of the waste heat boiler is respectively connected with the inlet of the waste heat boiler and a desulphurization device; the dedusting and denitration system comprises a high-temperature electrostatic deduster, an ammonia water injection system and an SCR denitration reactor which are sequentially connected, wherein an inlet of the high-temperature electrostatic deduster is connected with the waste heat boiler, an outlet of the high-temperature electrostatic deduster is connected with the SCR denitration reactor, and the SCR denitration reactor is connected with the waste heat boiler; the flue gas circulating system is connected with the outlet of the low-temperature section and the inlet of the high-temperature section of the waste heat boiler; the desulfurization device is connected with the chimney and the carbon dioxide capture device. The utility model provides a flue gas pretreatment device for capturing carbon dioxide in a glass kiln, which ensures the concentration of carbon dioxide in flue gas; the waste heat resource of the flue gas at the outlet of the low-temperature section of the glass melting furnace for waste heat power generation is effectively utilized; ensuring that the flue gas meets the flue gas index requirement of entering a carbon dioxide capture area.

Description

Flue gas pretreatment device for capturing carbon dioxide in glass kiln
Technical Field
The utility model relates to a technical field is retrieved to glass industry flue gas, is a flue gas preprocessing device who is used for glass kiln carbon dioxide entrapment particularly.
Background
The carbon capture, sealing and utilization technology is a process for purifying carbon dioxide discharged in the production process and then putting the carbon dioxide into a new production process. The process can recycle carbon dioxide and generate economic benefit. The pure oxygen glass kiln can generate a large amount of flue gas with high CO2 content, wherein the flue gas contains 30-40% of carbon dioxide, 2-4% of nitrogen, 3-10% of oxygen, 50-60% of water and the balance of impurities such as carbon monoxide, nitrogen oxide, sulfur dioxide, dust and the like. However, the temperature of flue gas after combustion in the glass kiln is up to 1200 ℃, and further, the temperature of flue gas of a waste heat boiler is required to be controlled at 600-650 ℃, and the flue gas is cooled by air mixing in the prior art, so that CO2 in the flue gas is diluted by a large amount of N2, and the capture of carbon dioxide is very difficult. In addition, since nitrogen oxides and sulfides in the flue gas will affect the activity of the sorbent, it is necessary to develop a device to control the flue gas outlet particulate matter concentration to be less than 5mg/Nm3, the SO2 concentration to be less than 30 mg/Nm3, and the NOX concentration to be less than 100 mg/Nm3, SO as to meet the flue gas index requirements entering the carbon dioxide capture area.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the not enough of prior art, provide a normal operating that neither influences glass kiln waste heat power generation system, can satisfy the flue gas preprocessing device that carbon dioxide entrapment system flue gas content and index need again.
In order to achieve the purpose, the flue gas pretreatment device for capturing carbon dioxide in a glass kiln is designed, and comprises:
the inlet of the waste heat boiler is connected with the glass kiln, a baffle is arranged in the waste heat boiler, the boiler is divided into a high-temperature section and a low-temperature section, and the outlet of the waste heat boiler is respectively connected with the inlet of the waste heat boiler and the desulfurization device;
the dedusting and denitration system comprises a high-temperature electrostatic dust collector, an ammonia water injection system and an SCR denitration reactor which are sequentially connected, wherein the inlet of the high-temperature electrostatic dust collector is connected with the high-temperature section of the waste heat boiler, the outlet of the high-temperature electrostatic dust collector is connected with the SCR denitration reactor through a flue, the ammonia water injection system injects ammonia water into the flue through the flue ammonia water injection point, a static mixer is arranged at the ammonia water injection point, the static mixer is connected with the SCR denitration reactor, and the SCR denitration reactor is connected with the inlet of the low-temperature section of the waste heat boiler;
the flue gas circulating system comprises a flue gas circulating fan and an electric regulating valve, and is connected with the outlet of the low-temperature section and the inlet of the high-temperature section of the waste heat boiler;
and the desulfurization device is connected with the chimney and the carbon dioxide capture device.
The utility model discloses still have following preferred technical scheme:
preferably, a temperature measuring element is further arranged at an inlet of the high-temperature section of the waste heat boiler and is connected with an electric regulating valve of the flue gas circulating system.
Preferably, the system further comprises an induced draft fan, wherein the induced draft fan is installed between the desulfurization device and the waste heat boiler.
Preferably, a flue adjusting gate and a cold air valve are further arranged between the glass kiln and the waste heat boiler.
Preferably, a pressure gauge is arranged behind the flue adjusting gate, and the pressure gauge is connected with the draught fan and the flue gas circulating fan.
Preferably, a compressed air preheating pipeline is arranged in the SCR denitration reactor and used for preheating compressed air in the reactor to reduce the influence on the temperature of the reactor.
Preferably, the SCR denitration reactor further comprises a compressed air soot blower, wherein the soot blower is of a movable rake structure and is provided with a rake nozzle for cleaning the catalyst.
Beneficial effects of the utility model
The utility model discloses an superiority is presented: (1) by arranging the flue gas circulating fan, the concentration of carbon dioxide in flue gas is ensured to be unchanged in a mode that 170 ℃ waste gas at the outlet of the low-temperature section of the waste heat boiler replaces cold air to be mixed into the flue gas at the outlet of the kiln; (2) the waste heat resource of the flue gas at the outlet of the low-temperature section of the glass melting furnace waste heat power generation is effectively utilized, the waste heat recovery and utilization efficiency of the glass production process is improved, and the generated energy of a waste heat power generation system is increased; (3) by arranging the high-temperature electrostatic dust collector and the SCR reactor, the concentration of particulate matters at the flue gas outlet is less than 5mg/Nm3, the concentration of SO2 is less than 30 mg/Nm3, and the concentration of NOX is less than 100 mg/Nm3, SO that the flue gas index requirement of a carbon dioxide trapping area is met, and the adsorbent in the carbon dioxide trapping process cannot be adversely affected.
Drawings
FIG. 1 is a schematic structural view of a flue gas pretreatment device for capturing carbon dioxide in a glass kiln according to the present invention;
in the drawings are labeled: the method comprises the following steps of 1-a glass kiln, 2-a flue adjusting gate plate, 3-a cold air valve, 4-a glass kiln waste heat boiler, 5-a high-temperature electrostatic dust removal device, 6-an ammonia water injection system, 7-a static mixer, 8-an SCR denitration reactor, 9-an induced draft fan, 10-a flue gas circulating fan, 11-an electric adjusting valve, 12-a desulfurization device, 13-a carbon dioxide collecting device, 14-a chimney, 41-a waste heat boiler high-temperature section and 42-a waste heat boiler low-temperature section.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model provides a flue gas preprocessing device of glass kiln carbon dioxide entrapment includes exhaust-heat boiler 4, high temperature electrostatic precipitator 5, aqueous ammonia injection system 6, static mixer 7, SCR denitration reactor 8, draught fan 9, flue gas circulating fan 10, electrical control valve 11, desulphurization unit 12, carbon dioxide entrapment purification device 13 and chimney 14. The interior of the waste heat boiler is divided into a high-temperature section 41 and a low-temperature section 42 by a baffle; the flue gas inlet of the high-temperature section 41 of the waste heat boiler is connected with the flue gas outlet of the glass melting furnace through a flue gas pipeline; exhaust-heat boiler high temperature section be connected with high temperature electrostatic precipitator 5, the flue gas gets into high temperature electrostatic precipitator 5 behind exhaust-heat boiler high temperature section and gathers dust, high temperature electrostatic precipitator 5 link to each other through the flue with SCR denitration reactor 7, aqueous ammonia injection system 6 send the aqueous ammonia into flue aqueous ammonia injection point through compressed air, set up static mixer 7 behind the aqueous ammonia injection point, static mixer 7's exit linkage SCR denitration reactor 8. The SCR denitration reactor 8 is connected with an inlet of the low-temperature section 42 of the waste heat boiler, and the denitrated clean flue gas returns to the low-temperature section 42 of the waste heat boiler to complete heat exchange. The outlet of the low-temperature section 42 of the waste heat boiler is divided into two paths, and one path is connected with the desulphurization device 13 through the induced draft fan 9. One path sends the flue gas to the front of the inlet of the waste heat boiler 4 through a flue gas circulating fan 10 and an electric regulating valve 11. The outlet of the desulfurization device 12 is connected with a carbon dioxide capturing and recycling device 13 and a chimney 14.
In this embodiment, the specific process flow is as follows: high-temperature flue gas at 1200-1300 ℃ at the outlet of the glass kiln 1 is cooled by opening a cold air valve of the kiln system, the flue gas is cooled to 600-650 ℃ and enters the waste heat boiler 4, and the flue gas is cooled to 320-350 ℃ after passing through a high-temperature section 41 of the waste heat boiler and then enters the high-temperature electrostatic dust collector 5. In the high-temperature electrostatic dust collector 5, smoke and dust are separated from the flue gas, and the concentration of the smoke and dust can be rapidly reduced after the flue gas is treated by the high-temperature electrostatic dust collector 5.
The utility model discloses an above-mentioned glass melting furnace flue gas pretreatment methods specifically includes following step:
the flue gas pretreatment device for capturing the carbon dioxide in the glass kiln comprises: the temperature of the flue gas at the outlet of the glass melting furnace is 1200-1300 ℃, and in order to ensure that the temperature of the flue gas entering the high-temperature section of the waste heat boiler is reduced to below 600 ℃, a cold air valve of the furnace system needs to be opened for cooling.
And cooling the flue gas to 320-350 ℃ after passing through the high-temperature section of the waste heat boiler, and then feeding the flue gas into a high-temperature electrostatic dust collector. In the high-temperature electrostatic dust collector, smoke dust is separated from flue gas, and the concentration of the smoke dust can be rapidly reduced after the flue gas is treated by the high-temperature electrostatic dust collector. And the dust property is greatly improved, and the adverse effect on the catalyst in the subsequent SCR denitration reactor is avoided. The removed smoke dust is collected in an ash bucket of the high-temperature electrostatic dust removal device, is conveyed to a bin pump by a chain conveyor at the bottom of the ash bucket, is conveyed to a waste bin by the bin pump and is finally transported outside.
The ammonia water injection system sends ammonia water into a flue ammonia water injection point through compressed air, the ammonia water injection amount is accurately controlled through an ammonia water injection adjusting system, and a static mixer is arranged behind the ammonia water injection point, so that the ammonia water/flue gas are further uniformly mixed. And (3) enabling the ammonia water/flue gas mixture to enter an SCR (selective catalytic reduction) reactor, and enabling NOx in the flue gas and NH3 to have an oxidation-reduction reaction under the action of a catalyst to generate nitrogen and water, so that the denitration process is completed.
The flue gas after denitration enters a low-temperature section of a waste heat boiler, the temperature is reduced to 180-190 ℃, in the whole flue gas air system, the flue gas is higher than the dew point temperature, SO3 is basically and completely removed, and the problem of corrosion does not exist;
after the temperature of the flue gas at the outlet of the furnace kiln is reduced to 600-650 ℃ by a cold air mixing cooling mode, in order to keep the concentration of carbon dioxide not to be reduced, a cold air valve is closed, and the flue gas circulation mode of the boiler is changed into a cooling mode. The method is characterized in that the flue gas at the outlet of the waste heat boiler is divided into two paths, one path of the flue gas is extracted by a circulating fan to replace cold air to be mixed into the flue gas at the outlet of the kiln, the temperature of the flue gas before entering the waste heat boiler is reduced to 600-650 ℃, and a closed loop is formed. In order to ensure the micro-positive pressure of the glass kiln, the smoke access point needs to be adjusted by an electric adjusting valve after the total adjusting flashboard of the glass kiln. And (3) detecting the concentration of the carbon dioxide after running for a period of time, starting a draught fan at the other path when the concentration reaches more than 30%, and enabling the flue gas to enter a desulfurization device to remove SOX and then enter a carbon dioxide capture and purification device.
Preferably, the cold air valve adopts electric drive, and sealed form is reasonable, realizes that emergency can long-rangely open, adjusts the flue gas temperature of going into exhaust-heat boiler, stabilizes the internal pressure of kiln.
Preferably, the flue from the glass furnace to the inlet of the waste heat power generation boiler is coated with heat-insulating spray paint, so that air leakage of the flue is prevented, and the concentration of carbon dioxide is ensured.
Preferably, a temperature measuring element is arranged at an inlet of the waste heat boiler and forms interlocking control with an electric regulating valve of a circulating air pipe, the opening degree of the temperature measuring element is automatically regulated, and the temperature of flue gas entering the waste heat boiler is controlled to be 600-650 ℃.
Preferably, a pressure gauge is arranged behind the main flue adjusting valve, and is in interlocking frequency conversion control with the induced draft fan and the circulating fan, so that the frequency of the induced draft fan is automatically adjusted, and the air pressure balance of the three smoke and air pipelines is ensured.
Preferably, a pressure gauge is arranged behind the flue adjusting gate, and the pressure gauge is connected with the draught fan and the flue gas circulating fan.
Preferably, the static mixer designed and manufactured for uniform mixing of ammonia and flue gas ensures high efficiency of the system and very low ammonia slip.
Preferably, a compressed air preheating pipeline is arranged in the SCR denitration reactor. When the reactor is in normal operation, the compressed air for soot blowing is preheated in the reactor, so that the influence on the temperature of the reactor is reduced. The safety of the catalyst is ensured, and the service life of the catalyst is prolonged to the maximum extent.
Preferably, the SCR denitration reactor adopts a compressed air soot blower. The soot blower adopts a movable rake type structure and a special rake type nozzle for cleaning the catalyst, and moves back and forth on the upper layer of the catalyst through a compressed air pipeline, so that the soot blowing effect is better with less consumption of compressed air.
The above, only for the concrete implementation of this utility model, but the scope of protection of this utility model is not limited to this, and any person skilled in this technical field is in the technical scope of this utility model discloses, according to the technical scheme of this utility model and novel design add in equal replacement or change, all should be covered in the scope of protection of this utility model.

Claims (7)

1. A flue gas preprocessing device for glass kiln carbon dioxide entrapment is characterized by including
The inlet of the waste heat boiler is connected with the glass kiln, a baffle is arranged in the waste heat boiler, the boiler is divided into a high-temperature section and a low-temperature section, and the outlet of the waste heat boiler is respectively connected with the inlet of the waste heat boiler and the desulfurization device;
the dedusting and denitration system comprises a high-temperature electrostatic dust collector, an ammonia water injection system and an SCR denitration reactor which are sequentially connected, wherein the inlet of the high-temperature electrostatic dust collector is connected with the high-temperature section of the waste heat boiler, the outlet of the high-temperature electrostatic dust collector is connected with the SCR denitration reactor through a flue, the ammonia water injection system injects ammonia water into the flue through the flue ammonia water injection point, a static mixer is arranged at the ammonia water injection point, the static mixer is connected with the SCR denitration reactor, and the SCR denitration reactor is connected with the inlet of the low-temperature section of the waste heat boiler;
the flue gas circulating system comprises a flue gas circulating fan and an electric regulating valve, and is connected with the outlet of the low-temperature section and the inlet of the high-temperature section of the waste heat boiler;
and the desulfurization device is connected with the chimney and the carbon dioxide capture device.
2. The pretreatment device for the carbon dioxide capture in the glass kiln, as recited in claim 1, wherein a temperature measuring element is further arranged at the inlet of the high-temperature section of the waste heat boiler and is connected with an electric regulating valve of the flue gas circulation system.
3. The pretreatment device of flue gas for capture of carbon dioxide in a glass kiln, according to claim 1, further comprising an induced draft fan, wherein the induced draft fan is installed between the desulfurization device and the waste heat boiler.
4. The flue gas pretreatment device for carbon dioxide capture of the glass kiln as claimed in claim 3, further comprising a flue adjusting shutter and a cold air valve between the glass kiln and the waste heat boiler.
5. The flue gas pretreatment device for capturing carbon dioxide in a glass kiln, according to claim 4, wherein a pressure gauge is arranged behind the flue gas adjusting damper, and the pressure gauge is connected with the induced draft fan and the flue gas circulating fan.
6. The pretreatment apparatus for carbon dioxide capture in glass kilns, as claimed in claim 1, wherein a compressed air preheating pipeline is arranged inside the SCR denitration reactor, and is used for preheating compressed air in the reactor to reduce the influence on the temperature of the reactor.
7. The flue gas pretreatment device for carbon dioxide capture in a glass kiln as recited in claim 6, wherein the SCR denitration reactor further comprises a compressed air soot blower, and the soot blower is of a moving rake structure and is provided with a rake nozzle for cleaning a catalyst.
CN202120367061.7U 2021-02-10 2021-02-10 Flue gas pretreatment device for capturing carbon dioxide in glass kiln Active CN215027580U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114887409A (en) * 2022-04-26 2022-08-12 成都易态科技有限公司 Method for efficiently combining waste heat utilization, dust removal and denitration of high-temperature flue gas
CN116036826A (en) * 2023-04-03 2023-05-02 中国电力工程顾问集团有限公司 Carbon dioxide capturing system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114887409A (en) * 2022-04-26 2022-08-12 成都易态科技有限公司 Method for efficiently combining waste heat utilization, dust removal and denitration of high-temperature flue gas
CN116036826A (en) * 2023-04-03 2023-05-02 中国电力工程顾问集团有限公司 Carbon dioxide capturing system and method

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Effective date of registration: 20230830

Address after: Room 2618, 26 / F, 2000 Zhongshan North Road, Putuo District, Shanghai 200063

Patentee after: SHANGHAI TRIUMPH ENERGY CONSERVATION ENGINEERING Co.,Ltd.

Patentee after: CHINA NATIONAL BUILDING MATERIALS (HEFEI) NEW ENERGY RESOURCES CO.,LTD.

Address before: Room 2618, 26 / F, 2000 Zhongshan North Road, Putuo District, Shanghai 200063

Patentee before: SHANGHAI TRIUMPH ENERGY CONSERVATION ENGINEERING Co.,Ltd.

TR01 Transfer of patent right