CN112920850A - Material returning device for biomass fluidized bed gasification furnace - Google Patents
Material returning device for biomass fluidized bed gasification furnace Download PDFInfo
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- CN112920850A CN112920850A CN202110103873.5A CN202110103873A CN112920850A CN 112920850 A CN112920850 A CN 112920850A CN 202110103873 A CN202110103873 A CN 202110103873A CN 112920850 A CN112920850 A CN 112920850A
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- 238000002309 gasification Methods 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 title claims abstract description 36
- 239000002028 Biomass Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 239000000571 coke Substances 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000002551 biofuel Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004939 coking Methods 0.000 description 4
- 238000005243 fluidization Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
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Classifications
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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
-
- 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
- C10J3/72—Other features
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a material returning device for a biomass fluidized bed gasification furnace, relates to a material returning system of a biological gasification furnace, aims to solve the problems that the material cannot be smoothly returned and the reliability is low because biomass fuel is easy to coke and stain in the existing fluidized bed gasification furnace, and comprises a material returning device, an air medium input device and a steam medium input device; the output end of the air medium input device is communicated with the input end of the feed back device, and the air medium input device is used for inputting air to the feed back device according to a first flow; the output end of the steam medium input device is simultaneously communicated with the input end of the feed back device, and the steam medium input device is used for inputting water steam with set temperature and pressure to the feed back device according to a second flow; when the gasification furnace is in an ignition stage, the fluidizing medium in the feed back device is only air; when the fuel in the gasifier is in a gasification state, the fluidizing medium in the feeding back device is air and water vapor.
Description
Technical Field
The invention relates to a material returning system of a biological gasification furnace.
Background
The biomass gasification furnace is a device for drying, pyrolyzing, combusting and reducing biofuel and finally converting the biofuel into combustible gas. And converting the low-quality biomass solid fuel into high-quality gas fuel through gasification reaction. The circulating fluidized bed gasification furnace is a high-efficiency gasification reaction device and has the advantage of unique thickness in the aspect of device enlargement. The gasification furnace is required to have a stable and reliable circulating ash loop by adopting a circulating fluidization operation mode. Comprises uniform bed material fluidization, high-efficiency gas-solid separation and stable circulating ash return material conveying. However, the biomass fuel ash contains high alkali metal content, so that the ash melting point is low, and the problems of coking, contamination and the like are easy to occur, so that the material return valve in the fluidized bed gasification furnace cannot smoothly return materials.
Disclosure of Invention
The invention aims to solve the problems that the material cannot be smoothly returned and the reliability is low due to easy coking and contamination of biomass fuel in the conventional fluidized bed gasification furnace, and provides a material returning device for the biomass fluidized bed gasification furnace.
The invention relates to a material returning device for a biomass fluidized bed gasification furnace, which comprises a material returning device, an air medium input device and a steam medium input device;
the output end of the air medium input device is communicated with the input end of the feed back device, and the air medium input device is used for inputting air to the feed back device according to a first flow;
the output end of the steam medium input device is simultaneously communicated with the input end of the feed back device, and the steam medium input device is used for inputting water steam with set temperature and pressure to the feed back device according to a second flow;
when the gasification furnace is in an ignition stage, the fluidizing medium in the feed back device is only air;
when the fuel in the gasifier is in a gasification state, the fluidizing medium in the feeding back device is air and water vapor.
The invention has the beneficial effects that:
the material returning device for the biomass fluidized bed gasification furnace can completely adopt air as a fluidized medium in the ignition stage of the gasification furnace, and has the characteristics of simple control, quick adjustment and low operation cost of an air medium system; when the fuel in the gasification furnace is stably combusted and begins to change into a gasification state, the material returning device adopts air and steam dual-medium fluidization. By utilizing the characteristics of water vapor non-combustion supporting and temperature control, the combustion of unburned biofuel in the feed back device can be effectively reduced by reducing the air content in the feed back device, the rise range of ash temperature in the feed back device is reduced, the problem of easy coking of the feed back device is thoroughly solved, the safety of the conversion from a combustion state to a gasification state in the starting process of the gasification furnace can be improved, and the smooth and reliable operation of a feed back system of the circulating fluidized bed gasification furnace is realized.
Drawings
Fig. 1 is a schematic structural diagram of a material returning device for a biomass fluidized bed gasification furnace according to the present invention.
Detailed Description
In a first specific embodiment, the material returning device for the biomass fluidized bed gasification furnace of the present embodiment comprises a material returning device 1, an air medium input device 2 and a steam medium input device 3;
the output end of the air medium input device 2 is communicated with the input end of the feed back device 1, and the air medium input device 2 is used for inputting air to the feed back device 1 according to a first flow;
the output end of the steam medium input device 3 is simultaneously communicated with the input end of the feed back device 1, and the steam medium input device 3 is used for inputting water steam with set temperature and pressure to the feed back device 1 according to a second flow;
when the gasification furnace is in the ignition stage, the fluidizing medium in the feed back device 1 is only air;
when the fuel in the gasifier is in a gasification state, the fluidizing medium in the feeding back device 1 is air and water vapor.
Specifically, in the material returning device for the biomass fluidized bed gasification furnace of the present embodiment, air and steam can be used as the fluidizing medium simultaneously or separately, and the steam medium input device 3 can input steam with set temperature, pressure and flow rate to the material returning device 1; the air medium input device 2 can input air with set flow rate to the feed back device 1.
Since steam and air are simultaneously fed into the feeding device 2, the temperature and the amount of comburent (oxygen in the air) in the feed back device 1 can be varied by adjusting the ratio of air and steam.
Air can be completely adopted as a fluidizing medium in the ignition stage of the gasification furnace, and the characteristics of simple control, rapid adjustment and low operation cost of an air medium system are exerted.
When the gasification furnace normally operates, namely when fuel in the gasification furnace stably burns and begins to change into a gasification state, the material returning device adopts air and steam dual-medium fluidization. The proportion of air and steam can be adjusted, the combustion of unburned biofuel in the feed back device can be effectively reduced by reducing the air content in the feed back device, the rising range of ash temperature in the feed back device is reduced, and the safety of the gasification state conversion from the combustion state in the starting process of the gasification furnace can be improved.
By adopting steam as a material returning fluidizing medium and utilizing the characteristics of no combustion supporting and temperature control of the steam, the temperature in the material returning device can be controlled, so that the problem of easy coking of the material returning device is thoroughly solved, and the smooth material returning of the material returning valve in the fluidized bed gasification furnace is realized.
Best embodiment, this embodiment is a further description of the first embodiment, and in this embodiment, the flow meter 4 is further included;
the output end of the air medium input device 2 and the output end of the steam medium input device 3 are simultaneously communicated with the input end of the feed back device 1 through a flow meter 4.
In the present embodiment, the steam medium input device 3 includes a desuperheating water pipeline 3-1, a high-temperature high-pressure steam pipeline 3-2, a low-temperature low-pressure steam pipeline 3-3, a desuperheating water regulating valve 3-4, a high-temperature high-pressure steam regulating valve 3-5, a desuperheater 3-6, a decompressor 3-7 and a first stop valve 3-8;
one end of the desuperheating water pipeline 3-1 is provided with a desuperheating water inlet 3-9, and the other end is communicated with a desuperheating water input port of the desuperheater 3-6 through a desuperheating water regulating valve 3-4;
one end of the high-temperature high-pressure steam pipeline 3-2 is provided with a high-temperature high-pressure steam inlet 3-10, and the other end is communicated with a high-temperature high-pressure steam inlet of the desuperheater 3-6 through a high-temperature high-pressure steam regulating valve 3-5;
a low-temperature low-pressure steam output port of the desuperheater 3-6 is communicated with one end of a low-temperature low-pressure steam pipeline 3-3, and the other end of the low-temperature low-pressure steam pipeline 3-3 is communicated with an inlet of the flowmeter 4 through a decompressor 3-7 and a first stop valve 3-8 in sequence.
Best embodiment, this embodiment is a further description of the first embodiment, in this embodiment, the air medium input device 2 includes an air pipe 2-1, an air regulating valve 2-2, and a first check valve 2-3;
one end of the air pipeline 2-1 is provided with an air inlet 2-4, and the other end of the air pipeline is communicated with an inlet of the flow meter 4 through an air regulating valve 2-2 and a first check valve 2-3 in sequence.
Specifically, by adopting the structure, the temperature and the pressure of the steam can be respectively controlled by the desuperheaters 3-6 and the pressure reducers 3-7, and the flow of the low-temperature and low-pressure steam is jointly controlled by the high-temperature and high-pressure steam regulating valves 3-5 and the desuperheating water regulating valve 3-4; the air flow can be controlled by an air regulating valve 2-2.
In the embodiment, a reduced-temperature water pressure test point 3-11 and a reduced-temperature water temperature test point 3-12 are arranged on a reduced-temperature water pipeline 3-1;
the reduced temperature water pressure test point is 3-11 and is used for measuring the pressure of the reduced temperature water;
the temperature of the desuperheating water test point is 3-12 and is used for measuring the temperature of the desuperheating water;
the high-temperature high-pressure steam pipeline 3-2 is provided with a high-temperature high-pressure steam pressure test point 3-13 and a high-temperature high-pressure steam temperature test point 3-14;
the high-temperature high-pressure steam pressure test point 3-13 is used for measuring the pressure of high-temperature high-pressure steam;
the high-temperature high-pressure steam temperature test points 3-14 are used for measuring the temperature of high-temperature high-pressure steam;
a low-temperature low-pressure steam pressure test point 3-15 and a low-temperature low-pressure steam temperature test point 3-16 are arranged on the low-temperature low-pressure steam pipeline 3-3;
the low-temperature low-pressure steam pressure test point is 3-15 and is used for measuring the pressure of low-temperature low-pressure steam;
and 3-16 low-temperature and low-pressure steam temperature test points for measuring the temperature of the low-temperature and low-pressure steam.
In the present embodiment, a plurality of input ends are provided for the feeding back device 1;
the input end of each feed back device 1 is communicated with the outlet of the flow meter 4 sequentially through a second check valve 1-1 and a second stop valve 1-2.
Claims (6)
1. A material returning device for a biomass fluidized bed gasification furnace is characterized by comprising a material returning device (1), an air medium input device (2) and a steam medium input device (3);
the output end of the air medium input device (2) is communicated with the input end of the feed back device (1), and the air medium input device (2) is used for inputting air to the feed back device (1) according to a first flow;
the output end of the steam medium input device (3) is simultaneously communicated with the input end of the feed back device (1), and the steam medium input device (3) is used for inputting water steam with set temperature and pressure to the feed back device (1) according to a second flow;
when the gasification furnace is in the ignition stage, the fluidizing medium in the feed back device (1) is only air;
when the fuel in the gasifier is in a gasification state, the fluidizing medium in the feeding back device (1) is air and water vapor.
2. The material returning device for the biomass fluidized bed gasification furnace according to claim 1, further comprising a flow meter (4);
the output end of the air medium input device (2) and the output end of the steam medium input device (3) are simultaneously communicated with the input end of the feed back device (1) through the flow meter (4).
3. The material returning device for the biomass fluidized bed gasification furnace according to claim 2, wherein the steam medium input device (3) comprises a desuperheating water pipeline (3-1), a high-temperature high-pressure steam pipeline (3-2), a low-temperature low-pressure steam pipeline (3-3), a desuperheating water regulating valve (3-4), a high-temperature high-pressure steam regulating valve (3-5), a desuperheater (3-6), a decompressor (3-7) and a first stop valve (3-8);
one end of the desuperheating water pipeline (3-1) is provided with a desuperheating water inlet (3-9), and the other end of the desuperheating water pipeline is communicated with a desuperheating water input port of the desuperheater (3-6) through a desuperheating water regulating valve (3-4);
one end of the high-temperature high-pressure steam pipeline (3-2) is provided with a high-temperature high-pressure steam inlet (3-10), and the other end of the high-temperature high-pressure steam pipeline is communicated with a high-temperature high-pressure steam input port of the desuperheater (3-6) through a high-temperature high-pressure steam regulating valve (3-5);
a low-temperature low-pressure steam output port of the desuperheater (3-6) is communicated with one end of the low-temperature low-pressure steam pipeline (3-3), and the other end of the low-temperature low-pressure steam pipeline (3-3) is communicated with an inlet of the flowmeter (4) through a decompressor (3-7) and a first stop valve (3-8) in sequence.
4. The material returning device for the biomass fluidized bed gasification furnace according to claim 3, wherein the air medium input device (2) comprises an air pipeline (2-1), an air regulating valve (2-2) and a first check valve (2-3);
one end of the air pipeline (2-1) is provided with an air inlet (2-4), and the other end of the air pipeline is communicated with an inlet of the flow meter (4) through an air regulating valve (2-2) and a first check valve (2-3) in sequence.
5. The material returning device for the biomass fluidized bed gasification furnace according to claim 4, characterized in that a desuperheating water pressure test point (3-11) and a desuperheating water temperature test point (3-12) are arranged on the desuperheating water pipeline (3-1);
the reduced temperature water pressure test point (3-11) is used for measuring the pressure of the reduced temperature water;
the temperature test point (3-12) of the desuperheating water is used for measuring the temperature of the desuperheating water;
the high-temperature high-pressure steam pipeline (3-2) is provided with a high-temperature high-pressure steam pressure test point (3-13) and a high-temperature high-pressure steam temperature test point (3-14);
the high-temperature high-pressure steam pressure test point (3-13) is used for measuring the pressure of high-temperature high-pressure steam;
the high-temperature high-pressure steam temperature test point (3-14) is used for measuring the temperature of high-temperature high-pressure steam;
a low-temperature low-pressure steam pressure test point (3-15) and a low-temperature low-pressure steam temperature test point (3-16) are arranged on the low-temperature low-pressure steam pipeline (3-3);
the low-temperature low-pressure steam pressure test point (3-15) is used for measuring the pressure of low-temperature low-pressure steam;
and the low-temperature low-pressure steam temperature test points (3-16) are used for measuring the temperature of the low-temperature low-pressure steam.
6. The material returning device for the biomass fluidized bed gasification furnace according to claim 5, characterized in that the material returning device (1) is provided with a plurality of input ends;
the input end of each feed back device (1) is communicated with the outlet of the flow meter (4) sequentially through a second check valve (1-1) and a second stop valve (1-2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110103873.5A CN112920850A (en) | 2021-01-26 | 2021-01-26 | Material returning device for biomass fluidized bed gasification furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110103873.5A CN112920850A (en) | 2021-01-26 | 2021-01-26 | Material returning device for biomass fluidized bed gasification furnace |
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| CN112920850A true CN112920850A (en) | 2021-06-08 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566749A (en) * | 2003-06-11 | 2005-01-19 | 上海锅炉厂有限公司 | Method of fluidizing wind at high pressure using steam to replace air |
| CN201599791U (en) * | 2010-02-10 | 2010-10-06 | 无锡华光工业锅炉有限公司 | Device for eliminating coking of material returner of fluidized-bed boiler |
| CN107806634A (en) * | 2017-12-07 | 2018-03-16 | 济南海耀新能源设备有限公司 | A kind of novel fluidization technique |
| CN208967786U (en) * | 2018-09-10 | 2019-06-11 | 山东百川同创能源有限公司 | A kind of circle fluidized-bed gasification furnace material-returning device |
| US20200224110A1 (en) * | 2019-01-16 | 2020-07-16 | China University Of Petroleum (East China) | Method of biomass grading pyrolysis gasification in a circulating fluidized bed |
| CN111978996A (en) * | 2020-07-30 | 2020-11-24 | 哈尔滨锅炉厂有限责任公司 | Bed temperature control device and method for biomass gasification furnace |
-
2021
- 2021-01-26 CN CN202110103873.5A patent/CN112920850A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566749A (en) * | 2003-06-11 | 2005-01-19 | 上海锅炉厂有限公司 | Method of fluidizing wind at high pressure using steam to replace air |
| CN201599791U (en) * | 2010-02-10 | 2010-10-06 | 无锡华光工业锅炉有限公司 | Device for eliminating coking of material returner of fluidized-bed boiler |
| CN107806634A (en) * | 2017-12-07 | 2018-03-16 | 济南海耀新能源设备有限公司 | A kind of novel fluidization technique |
| CN208967786U (en) * | 2018-09-10 | 2019-06-11 | 山东百川同创能源有限公司 | A kind of circle fluidized-bed gasification furnace material-returning device |
| US20200224110A1 (en) * | 2019-01-16 | 2020-07-16 | China University Of Petroleum (East China) | Method of biomass grading pyrolysis gasification in a circulating fluidized bed |
| CN111978996A (en) * | 2020-07-30 | 2020-11-24 | 哈尔滨锅炉厂有限责任公司 | Bed temperature control device and method for biomass gasification furnace |
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Application publication date: 20210608 |