CN113583716A - Double-circulation coal-to-liquid fluidized bed - Google Patents
Double-circulation coal-to-liquid fluidized bed Download PDFInfo
- Publication number
- CN113583716A CN113583716A CN202110905063.1A CN202110905063A CN113583716A CN 113583716 A CN113583716 A CN 113583716A CN 202110905063 A CN202110905063 A CN 202110905063A CN 113583716 A CN113583716 A CN 113583716A
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- fly ash
- chamber
- furnace
- coal
- fluidized bed
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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)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention relates to a dual-cycle coal-to-gas fluidized bed, comprising: gasifier, cyclone, dust remover and bin pump. The gasification furnace comprises a furnace body and a furnace chamber; a fly ash detention chamber is arranged in the furnace chamber, is of an annular structure and is arranged outwards along the circumferential direction of the inner wall of the furnace chamber; a partition plate is arranged between the retention chamber and the furnace chamber, an opening is arranged at the lower part of the partition plate, and the retention 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, the fly ash in the detention chamber slowly flows to subside to absorb heat, falls to an opening and enters the furnace chamber to be burned out in a recycling mode. The invention has the advantages of reasonable structure, flexibility and 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 semicoke and carbon-containing fly ash recycling dual-cycle coal-to-gas fluidized bed, and belongs to the technical field of coal gasification.
Background
In recent years, the development and utilization of clean energy such as wind power, hydroelectric power, nuclear power, photovoltaic power and the like are accelerated, but the development and utilization of clean energy cannot meet the social development requirements. At present and in a certain period in future, coal is still the main heat energy of the industries such as smelting, chemical engineering, ceramics and the like in China, and the basic energy pattern in China determines that the research and development of clean and efficient utilization of coal is an important research and development direction. Among the various clean conversion and utilization processes of coal, gasification is one of the most widely used technologies. Therefore, various gasifiers, such as fixed bed gasifiers, have high carbon conversion rate and thermal efficiency, but a large amount of tar and phenol water is produced in the production process. With the continuously upgraded environmental protection requirement, people also design a circulating fluidized bed gasification furnace which can prepare clean coal gas, but generates a large amount of carbon-containing fly ash in the gas preparation process, thereby reducing the carbon conversion rate and causing environmental pollution. People often construct power plants to treat fly ash in a matching way, the investment is large, the cost is high, and the fly ash treatment device is not suitable for technical transformation and equipment transformation upgrading of small and medium-sized enterprises. 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
The invention provides a double-circulation coal-to-gas fluidized bed, aiming at the problem that carbon-containing fly ash generated by a circulating fluidized bed in the background art is difficult to treat. 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 absorbs heat in the detention chamber in a slow flow manner, overflows into a furnace chamber and is burnt out in high-temperature air flow, 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 the following technical solution, a dual cycle coal-to-gas fluidized bed, comprising: the gasification furnace comprises a furnace body and a furnace chamber, raw material coal is gasified in the furnace chamber to generate mixed gas flow containing semicoke, fly ash and coal gas, the mixed gas flow is separated by the cyclone separator, the separated semicoke is recycled to enter the furnace chamber for gasification, the separated fly ash-containing coal gas enters the dust remover for gas-ash separation, the separated coal gas enters next equipment, and the separated fly ash enters the bin pump, and the gasification furnace is characterized in that:
the fly ash retention chamber is arranged in the furnace chamber, the retention chamber is of an annular structure and is arranged in a mode of protruding outwards along the circumferential direction of the inner wall of the furnace chamber, a partition plate is arranged between the retention chamber and the furnace chamber, an opening is formed in the lower portion of the partition plate, the retention chamber is communicated with the furnace chamber through the opening, a fly ash conveying pipeline is arranged between the retention chamber and the cabin pump, one end of the fly ash conveying pipeline is communicated with the upper portion of the inner cavity of the retention chamber, the other end of the fly ash conveying pipeline is connected with the cabin pump, a spray nozzle is arranged at one end of the fly ash conveying pipeline arranged in the inner cavity of the retention chamber, the cabin pump intermittently sprays fly ash to the retention chamber through the fly ash conveying pipeline and the spray nozzle, the fly ash in the retention chamber slowly flows, subsides and absorbs heat, and falls to the opening to the furnace chamber to be recycled and burnt out.
Preferably, the bottom surface of the detention chamber is set to be a slope shape, and the part connected with the furnace chamber is low.
Preferably, the fly ash conveying pipelines are provided with a plurality of pipelines and are uniformly distributed along the circumferential direction of the detention chamber.
Furthermore, a plurality of spray holes are formed in the spray head.
Further, the partition plate is a heat-resistant plate, and the thickness of the heat-resistant plate is set to be 8-20 mm.
Further, the height of the inner cavity of the retention chamber is greater than 1/2 of the diameter of the furnace cavity.
Further, the residence time of the fly ash in the retention chamber is set to 2 to 6 seconds.
The invention arranges a carbon-containing fly ash detention chamber at the periphery of the gasification furnace chamber, and sets the fly ash conveying mode to be an intermittent working mode, so that the fly ash slowly runs in the detention chamber for a certain time; the fly ash is fully preheated in the slow flow descending process, and gradually fused with the gasifying agent at the opening, so as to be burnt out. A double-circulation coal-to-gas fluidized bed realizes the purpose of double-circulation high-efficiency gasification of carbon-containing fly ash recycling while the semicoke recycling is gasified.
The device has the advantages of reasonable structure, flexibility and 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 structural view of the present invention
In the drawing, 1 is a gasification furnace, 2 is a retention chamber, 201 is a partition plate, 3 is a fly ash conveying pipeline, 301 is a spray head, 4 is a grid plate, 5 is a gasification 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 way of example in the following with reference to the accompanying drawings:
FIG. 1 shows an embodiment in which fly ash is fed into a retention chamber 2 by the pressure in a nitrogen storage tank 11 and then fed into a gasification furnace 1 to burn out the fly ash for gasification. Raw material coal enters a gasification furnace 1, a gasification agent is sent into a furnace cavity of the gasification furnace 1 through a gasification agent pipeline 5 and an air distribution plate 4, the raw material coal and the gasification agent are gasified in the furnace cavity to generate mixed air flow containing semicoke, fly ash and coal gas, the mixed air flow enters a cyclone separator 9 for separation, the separated semicoke circularly enters the furnace cavity of the gasification furnace 1 for re-gasification, the separated coal gas containing the fly ash enters a dust remover 8 for gas-ash separation, the separated coal gas enters next equipment, and the fly ash is sent into a fly ash storage tank 6 through a bin pump 7. The pressure nitrogen in the nitrogen storage tank 11 is controlled by the electromagnetic switch valve 10 to intermittently impact the fly ash in the fly ash storage tank 6, so that the fly ash is intermittently sprayed to the detention chamber 2 through the fly ash conveying pipe 3 and the spray head 301. In this embodiment, the spray head 301 is provided with a plurality of spray holes so that the fly ash entering the retention chamber 2 is dispersed and suspended. The bottom surface of the detention chamber 2 is set to be slope-shaped, and the portion connected with the furnace chamber is low, so that the fly ash from the bottom of the opening of the lower part of the partition 201 can smoothly slide into the furnace chamber. The partition 201 is a heat-resistant plate and has a thickness of 10 mm, so that the inner cavity of the retention chamber 2 receives more heat due to heat transfer, and the temperature of the fly ash entering the inner cavity of the retention chamber 2 is increased rapidly. The height of the inner cavity of the detention chamber 2 is larger than the limit of the diameter 1/2 of the furnace chamber, the detention time of the fly ash in the detention chamber 2 is controlled within the range of 2-6 seconds, the fly ash is slowly settled and absorbs heat in the detention chamber 2, and the fly ash flows downwards and then is recycled from the opening on the partition plate 201 to enter the furnace chamber to be burnt out.
Claims (7)
1. A dual cycle coal to gas fluidized bed, comprising: the gasification furnace comprises a furnace body and a furnace chamber, raw material coal is gasified in the furnace chamber to generate mixed gas flow containing semicoke, fly ash and coal gas, the mixed gas flow is separated by the cyclone separator, the separated semicoke is recycled to enter the furnace chamber for gasification, the separated fly ash-containing coal gas enters the dust remover for gas-ash separation, the separated coal gas enters next equipment, and the separated fly ash enters the bin pump, and the gasification furnace is characterized in that:
the fly ash retention chamber is arranged in the furnace chamber, the retention chamber is of an annular structure and is arranged in a mode of protruding outwards along the circumferential direction of the inner wall of the furnace chamber, a partition plate is arranged between the retention chamber and the furnace chamber, an opening is formed in the lower portion of the partition plate, the retention chamber is communicated with the furnace chamber through the opening, a fly ash conveying pipeline is arranged between the retention chamber and the cabin pump, one end of the fly ash conveying pipeline is communicated with the upper portion of the inner cavity of the retention chamber, the other end of the fly ash conveying pipeline is connected with the cabin pump, a nozzle is arranged at one end of the fly ash conveying pipeline arranged in the inner cavity of the retention chamber, the cabin pump is used for intermittently spraying fly ash to the retention chamber through the fly ash conveying pipeline and the nozzle, the fly ash in the retention chamber slowly flows, subsides and absorbs heat, and enters the furnace chamber through the opening to be recycled and burnt out.
2. The dual cycle coal to gas fluidized bed of claim 1, wherein: the bottom surface of the detention chamber is set to be a slope shape, and the part connected with the furnace chamber is low.
3. The dual cycle coal to gas fluidized bed of claim 1, wherein: the fly ash conveying pipelines are arranged in a plurality of numbers and are uniformly distributed along the circumferential direction of the detention chamber.
4. The dual cycle coal to gas fluidized bed of claim 1, wherein: the spray head is provided with a plurality of spray holes.
5. The dual cycle coal to gas fluidized bed of claim 1, wherein: the baffle is heat-resisting board, heat-resisting board thickness sets up to 8 ~ 20 millimeters.
6. The dual cycle coal to gas fluidized bed of claim 1, wherein: further, the height of the inner cavity of the retention chamber is greater than 1/2 of the diameter of the furnace cavity.
7. The dual-cycle coal-to-gas fluidized bed of claim 1 or 6, wherein: the residence time of the fly ash in the residence chamber is set to be 2-6 seconds.
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 |
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| 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 |
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| CN113583716A true CN113583716A (en) | 2021-11-02 |
| CN113583716B CN113583716B (en) | 2023-07-14 |
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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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| CN113583716B (en) | 2023-07-14 |
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