CN113583716B - Dual-cycle coal gas fluidized bed - Google Patents
Dual-cycle coal gas fluidized bed Download PDFInfo
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- CN113583716B CN113583716B CN202110905063.1A CN202110905063A CN113583716B CN 113583716 B CN113583716 B CN 113583716B CN 202110905063 A CN202110905063 A CN 202110905063A CN 113583716 B CN113583716 B CN 113583716B
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- chamber
- fly ash
- detention
- furnace
- conveying pipeline
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention relates to a double-circulation coal gas fluidized bed, which comprises: gasifier, cyclone separator, dust remover and storehouse pump. The gasification furnace comprises a furnace body and a furnace chamber; the furnace chamber is internally provided with a fly ash detention chamber which is of an annular structure and is arranged along the circumferential outer convex of the inner wall of the furnace chamber; a baffle plate is arranged between the detention chamber and the furnace chamber, an opening is arranged at the lower part of the baffle plate, and the detention chamber is communicated with the furnace chamber through the opening; a fly ash conveying pipeline is arranged between the detention chamber and the bin pump, one end of the fly ash conveying pipeline is communicated with the upper part of the inner cavity of the detention chamber, the other end of the fly ash conveying pipeline is connected with the bin pump, the bin pump intermittently sprays fly ash to the detention chamber through the fly ash conveying pipeline, and the fly ash in the detention chamber slowly flows, subsides and absorbs heat, falls to an opening and enters the furnace chamber for recycling and burning out. The invention has reasonable structure, flexibility, adjustability, good fly ash burnout effect, high carbon conversion rate, energy conservation and environmental protection. The operation is simple, and the failure rate is low.
Description
Technical Field
The invention relates to a fluidized bed, in particular to a double-circulation coal gas fluidized bed for recycling semicoke and carbon-containing fly ash, and belongs to the technical field of coal gasification.
Background
In recent years, although the development and utilization speeds of clean energy sources such as wind power, hydroelectric power, nuclear power and photovoltaic are increased, the method still cannot meet the social development requirements. At present, even in a certain period in the future, coal is still the main energy source for smelting, chemical industry, ceramics and other industries in China, and the basic energy pattern in China determines the research and development of clean and efficient utilization of coal as an important research and development direction. Among various clean reforming and utilization processes of coal, gasification is one of the most widely used technologies. Therefore, various gasifiers, such as a fixed bed gasifier, have been designed to have high carbon conversion and thermal efficiency, but a large amount of tar and phenol water are produced during the production process. Along with the continuously updated environmental protection requirement, people design a circulating fluidized bed gasifier which can prepare clean coal gas, but a large amount of carbon-containing fly ash is generated in the gas preparation process, so that the carbon conversion rate is reduced, and the environment is polluted. People often complete with the construction of power plant to handle the flying ash, the investment is big, and the cost is high, is not suitable for medium and small enterprises to carry out technical transformation and equipment transformation upgrading. In order to develop the advantages of the circulating fluidized bed, the circulating fluidized bed gasification furnace must be scientifically designed and improved.
Disclosure of Invention
Aiming at the problem that the carbon-containing fly ash generated by the circulating fluidized bed in the background technology is difficult to treat, the invention provides a double-circulating coal gas fluidized bed. The carbon-containing fly ash is intermittently conveyed to a fly ash detention chamber arranged in the inner cavity of the gasification furnace, so that the fly ash slowly flows in the detention chamber to absorb heat, overflows into the furnace cavity and is burnt out in high-temperature airflow, and the defect that the fly ash is treated by other equipment in the traditional circulating fluidized bed is overcome.
In order to achieve the above object, the present invention provides a dual cycle coal gas fluidized bed, comprising: the gasification furnace comprises a furnace body and a furnace chamber, raw coal is gasified in the furnace chamber to generate a mixed gas flow containing semicoke, fly ash and coal gas, the mixed gas flow is separated through the cyclone separator, the separated semicoke is recycled to enter the furnace chamber for gasification, the separated coal gas containing the fly ash enters the dust remover for gas-ash separation, the separated coal gas enters the lower equipment, and the separated fly ash enters the chamber pump, and the gasification furnace is characterized in that:
the device is characterized in that a fly ash detention chamber is arranged in the furnace chamber, the detention chamber is of an annular structure and is arranged along the circumferential outer convex of the inner wall of the furnace chamber, a partition plate is arranged between the detention chamber and the furnace chamber, an opening is arranged at the lower part of the partition plate, the detention chamber is communicated with the furnace chamber through the opening, a fly ash conveying pipeline is arranged between the detention chamber and the chamber pump, one end of the fly ash conveying pipeline is communicated with the upper part of the inner cavity of the detention chamber, the other end of the fly ash conveying pipeline is connected with the chamber pump, a spray head is arranged at one end of the fly ash conveying pipeline in the inner cavity of the detention chamber, the chamber pump sprays fly ash to the detention chamber through the fly ash conveying pipeline and the spray head, slow flow sedimentation and heat absorption in the detention chamber falls to the opening to enter the furnace chamber for recycling burnout.
Preferably, the bottom surface of the retention chamber is provided as a slope, and the portion connected to the cavity is low.
Preferably, the fly ash conveying pipeline is provided with a plurality of fly ash conveying pipelines and is uniformly distributed along the circumferential direction of the detention chamber.
Further, a plurality of spray holes are formed in the spray head.
Further, the separator is a heat-resistant plate, and the thickness of the heat-resistant plate is set to 8-20 mm.
Further, the inner cavity height of the retention chamber is more than 1/2 of the diameter of the furnace chamber.
Further, the residence time of the fly ash in the residence chamber is set to 2 to 6 seconds.
The invention sets the carbon-containing fly ash detention chamber at the periphery of the gasification furnace chamber, and sets the fly ash transportation to intermittent operation, so that the fly ash slowly moves in the detention chamber for a certain time; the fly ash is fully preheated in the descending process of the slow flow, gradually reaches the fusion of the opening and the gasifying agent, and is burnt out. The double-circulation coal gas fluidized bed realizes the double-circulation high-efficiency gasification of the carbon-containing fly ash by recycling gasification while recycling and re-gasifying semicoke.
The device has reasonable structure, flexibility, adjustability, good fly ash burnout effect, high carbon conversion rate, energy conservation and environmental protection. The operation is simple, and the failure rate is low.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention
In the drawing, 1 is a gasifier, 2 is a detention chamber, 201 is a baffle plate, 3 is a fly ash conveying pipeline, 301 is a spray head, 4 is an air distribution plate, 5 is a gasifying agent pipeline, 6 is a fly ash storage tank, 7 is a bin pump, 8 is a dust remover, 9 is a cyclone separator, 10 is an electromagnetic switch valve, and 11 is a nitrogen storage tank.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 shows an embodiment in which fly ash is fed into the holding chamber 2 by the pressure in the nitrogen storage tank 11 and then into the gasifier 1 for burnout gasification. Raw material coal enters the gasification furnace 1, gasifying agent is sent into the furnace chamber of the gasification furnace 1 through a gasifying agent pipeline 5 and through a wind distribution plate 4, raw material coal and gasifying agent are gasified in the furnace chamber to generate mixed gas flow containing semicoke, fly ash and coal gas, the mixed gas flow enters a cyclone separator 9 for separation, the separated semicoke is recycled into the furnace chamber of the gasification furnace 1 for regasification, the separated coal gas containing fly ash enters a dust remover 8 for gas-ash separation, the separated coal gas enters a lower channel device, and the fly ash is sent into a fly ash storage tank 6 through a bin pump 7. The electromagnetic switch valve 10 controls the pressure nitrogen in the nitrogen tank 11 to intermittently impact the fly ash in the fly ash tank 6 so that the fly ash is intermittently sprayed to the detention chamber 2 through the fly ash conveying pipe 3 and the shower head 301. In this embodiment, a plurality of spray holes are provided on the spray head 301, so that fly ash entering the detention chamber 2 is dispersed and suspended. The bottom surface of the retention chamber 2 is formed in a slope shape and is connected to the cavity at a low position so that fly ash from the bottom of the opening at the lower portion of the partition 201 can smoothly slide into the cavity. The separator 201 is a heat-resistant plate, and has a thickness of 10 mm, so that the inner cavity of the retention chamber 2 obtains more heat caused by heat transfer, and fly ash entering the inner cavity of the retention chamber 2 is quickly warmed up. The inner cavity of the detention chamber 2 is higher than the limit of 1/2 of the diameter of the furnace chamber, the detention time of the fly ash in the detention chamber 2 is controlled to be in the range of 2-6 seconds, slow flow settlement and heat absorption of the fly ash in the detention chamber 2 are realized, and the fly ash is recycled into the furnace chamber from an opening on the partition plate 201 to burn out after descending.
Claims (6)
1. A dual cycle coal entrained flow bed comprising: the gasification furnace comprises a furnace body and a furnace chamber, raw coal is gasified in the furnace chamber to generate a mixed gas flow containing semicoke, fly ash and coal gas, the mixed gas flow is separated through the cyclone separator, the separated semicoke is recycled to enter the furnace chamber for gasification, the separated coal gas containing the fly ash enters the dust remover for gas-ash separation, the separated coal gas enters the lower equipment, and the separated fly ash enters the chamber pump, and the gasification furnace is characterized in that:
the device is characterized in that a fly ash detention chamber is arranged in the furnace chamber, the detention chamber is of an annular structure and is arranged along the circumferential outer convex of the inner wall of the furnace chamber, a partition plate is arranged between the detention chamber and the furnace chamber, an opening is arranged at the lower part of the partition plate, the detention chamber is communicated with the furnace chamber through the opening, a fly ash conveying pipeline is arranged between the detention chamber and the chamber pump, one end of the fly ash conveying pipeline is communicated with the upper part of the inner cavity of the detention chamber, the other end of the fly ash conveying pipeline is connected with the chamber pump, a spray head is arranged at one end of the fly ash conveying pipeline arranged in the inner cavity of the detention chamber, the chamber pump intermittently sprays fly ash to the detention chamber through the fly ash conveying pipeline and the spray head, slow flow sedimentation and heat absorption in the detention chamber enter the furnace chamber through the opening to be burnt out in a recycling way, and detention time in the detention chamber is set to be 2-6 seconds.
2. The dual cycle coal entrained flow bed as recited in claim 1, wherein: the bottom surface of the detention chamber is arranged in a slope shape, and the part connected with the furnace chamber is low.
3. The dual cycle coal entrained flow bed as recited in claim 1, wherein: the fly ash conveying pipelines are arranged in a plurality of groups and are uniformly distributed along the circumferential direction of the detention chamber.
4. The dual cycle coal entrained flow bed as recited in claim 1, wherein: the spray nozzle is provided with a plurality of spray holes.
5. The dual cycle coal entrained flow bed as recited in claim 1, wherein: the separator is a heat-resistant plate, and the thickness of the heat-resistant plate is set to 8-20 mm.
6. The dual cycle coal entrained flow bed as recited in claim 1, wherein: further, the inner cavity of the retention chamber is higher than 1/2 of the diameter of the furnace chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110905063.1A CN113583716B (en) | 2021-08-08 | 2021-08-08 | Dual-cycle coal gas fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110905063.1A CN113583716B (en) | 2021-08-08 | 2021-08-08 | Dual-cycle coal gas fluidized bed |
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| Publication Number | Publication Date |
|---|---|
| CN113583716A CN113583716A (en) | 2021-11-02 |
| CN113583716B true CN113583716B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110905063.1A Active CN113583716B (en) | 2021-08-08 | 2021-08-08 | Dual-cycle coal gas fluidized bed |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010010630A1 (en) * | 2008-07-25 | 2010-01-28 | ジェーティーエスインターナショナル株式会社 | Method for incinerating waste by two-stage swirling flow fluidized bed incinerator |
| CN206069794U (en) * | 2016-09-12 | 2017-04-05 | 中国华能集团公司 | The coal gasification of a kind of flying dust and waste water recirculation, cleaning system |
| CN106635179A (en) * | 2017-01-23 | 2017-05-10 | 江苏华威机械制造有限公司 | Circulating fluidized bed and pyrolysis bed combined gasification process and device |
| CN109517627A (en) * | 2019-01-22 | 2019-03-26 | 中聚信海洋工程装备有限公司 | A kind of device and method of carbon containing flying dust cycle gasification |
| CN109852431A (en) * | 2019-03-06 | 2019-06-07 | 中聚信海洋工程装备有限公司 | A kind of ciculation fluidized double bed heating gas station and its gas-made technology |
| CN209456378U (en) * | 2019-01-22 | 2019-10-01 | 中聚信海洋工程装备有限公司 | A kind of device of carbon containing flying dust cycle gasification |
-
2021
- 2021-08-08 CN CN202110905063.1A patent/CN113583716B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010010630A1 (en) * | 2008-07-25 | 2010-01-28 | ジェーティーエスインターナショナル株式会社 | Method for incinerating waste by two-stage swirling flow fluidized bed incinerator |
| CN206069794U (en) * | 2016-09-12 | 2017-04-05 | 中国华能集团公司 | The coal gasification of a kind of flying dust and waste water recirculation, cleaning system |
| CN106635179A (en) * | 2017-01-23 | 2017-05-10 | 江苏华威机械制造有限公司 | Circulating fluidized bed and pyrolysis bed combined gasification process and device |
| CN109517627A (en) * | 2019-01-22 | 2019-03-26 | 中聚信海洋工程装备有限公司 | A kind of device and method of carbon containing flying dust cycle gasification |
| CN209456378U (en) * | 2019-01-22 | 2019-10-01 | 中聚信海洋工程装备有限公司 | A kind of device of carbon containing flying dust cycle gasification |
| CN109852431A (en) * | 2019-03-06 | 2019-06-07 | 中聚信海洋工程装备有限公司 | A kind of ciculation fluidized double bed heating gas station and its gas-made technology |
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| CN113583716A (en) | 2021-11-02 |
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