CN104498102A - Coal gasification method - Google Patents
Coal gasification method Download PDFInfo
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- CN104498102A CN104498102A CN201410824627.9A CN201410824627A CN104498102A CN 104498102 A CN104498102 A CN 104498102A CN 201410824627 A CN201410824627 A CN 201410824627A CN 104498102 A CN104498102 A CN 104498102A
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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
- C10J3/48—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
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
-
- 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
- C10J3/723—Controlling or regulating the gasification process
-
- 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
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- 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
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
-
- 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
- C10J2300/0903—Feed preparation
- C10J2300/0909—Drying
-
- 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
- C10J2300/0936—Coal fines for producing producer gas
-
- 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
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1615—Stripping
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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)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention provides a coal gasification method. The coal gasification method comprises the following steps: grinding the coal, drying, pressurizing and transporting the pulverized coal, and gasifying the pulverized coal in a gasification furnace. On the model selection of a coal grinder, primary air entering the coal grinder from a hot blast heater is annularly distributed, the temperature of the hot air entering the coal grinder is ensured to be higher than the conversion temperature of brown coal, the local surface of the brown coal is ensured not to be overheated, and the escape of volatile components in the brown coal can be reduced; the high-volatility brown coal is adopted as a raw material, the coal grinding system is controlled, the maximum concentration of oxygen is 4 percent, a new flow of low-pressure nitrogen is supplemented to a coal grinder sealing system, an nitrogen inlet in the system is also increased, the impact on a grinding roll is reduced, and the vibration of the coal grinder is reduced; the combustion temperature in the gasification furnace is 150 to 200 DEG C higher than the flowing temperature of lime-ash. Under the temperature and pressure, not only can the conversion rate of carbon in the gasification furnace be ensured to reach 99 percent, but also the lime-ash is good in flow characteristic.
Description
Technical field
The present invention relates to a kind of coal gasification method, belong to coal chemical technology.
Background technology
Coal is a kind of storage rich in natural resources.Gasification is efficient, clean coal utilization method.The technology that current gasification generally adopts has oxygen-enriched continuous gasification, fluidized-bed gasification technology, double-section dry coal powder pressure gasifying technology etc.But the equal existing defects of above-mentioned technology.
Oxygen-enriched continuous gasification has following defect:
(1) this technique oxygen, needs to build air separation facility, invest higher, and oxygen cost is high, and this is the main reason that the development of restriction oxygen-enriched continuous gasification and small and medium ammonia synthesis plant adopt this technique producer less.
(2) oxygen-enriched continuous gasification gaseous constituent is poor, and carbon dioxide content is up to 15 ~ 20%, and methane content up to 2%, and contains the organism such as benzene, naphthalene in gas.Great problem is brought to follow-up workshop section.Particularly methane and organic problem, do not have very good solution at present.
(3) the more difficult control of oxygen level in oxygen-enriched continuous gasification gaseous constituent, brings potential safety hazard to follow-up workshop section.In order to control oxygen level in production process, the measure taked improves gas furnace temperature out higher than 500 DEG C, and this measure causes again coal consumption and increases.
Fluidized-bed gasification technology has following defect:
Vapor pressure is normal pressure, and single stove vaporization ability is also lower, and in gas product, CH4 content is up to 1.5-2%, flying dust amount is large, environmental pollution and flying dust store up have with problem of complex utilization to be solved
Double-section dry coal powder pressure gasifying technology has following defect:
Vapourizing furnace adopts water wall structure, and its shortcoming is CH in synthetic gas
4content is higher, unfavorable to synthetic ammonia processed, methyl alcohol, hydrogen.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of coal gasification method, concrete preparation process is as follows:
(1) coal-grinding and drying unit
Brown coal are after predrying, broken brown coal granularity is less than 15mm, above-mentionedly rise to 45 meters high through pre-dried brown coal by bucket elevator, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, under gravity, pulverize in coal pulverizer is entered into by feeder, the hotblast stove First air entering coal pulverizer out distributes circlewise and enters, the temperature simultaneously controlling to enter the First air of coal pulverizer is not more than the invert point of brown coal, control temperature when the inert gas that produced by inert gas generator enters coal pulverizer import and be about 150 ~ 250 DEG C, when leaving coal pulverizer, temperature is about 100 ~ 105 DEG C, the oxygen level maximum volume per-cent controlled in coal pulverizer is 4%, the fine coal obtained after pulverizing carries out isolation of purified by fine coal deep bed filter, the particle size distribution specification of fine coal and the moisture content of fine coal meet following requirement:
The weight accounting of particle size≤90 μm is 90%;
It is 10% that the weight of particle size≤5 μm accounts for;
Water content < 5% weight;
(2) fine coal pressurization and conveying
In a pressurization addition programs, fine coal in normal pressure coal bunker loads fine coal lock hopper by action of gravity, after being full of fine coal in fine coal lock hopper, namely isolate with all low-voltage equipments, pressurize when being pressurized to and to batch can, there is identical pressure with fine coal complete, between fine coal lock hopper and fine coal are to batch can, compensation flap is opened, when powder lock hopper and fine coal to batch can, there is identical pressure and fine coal to the coal position in batch can be reduced to be enough to receive next batch fine coal time, two the lock hopper valves only need opening coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, once pressurization is completed reinforced to this, switching programme controls cut-off, the step-down of coal dust lock hopper and again coalings,
(3) vapourizing furnace gasification
Then fine coal is transported to gasifier nozzle from pressurization coal bunker, gasifier nozzle has three fine coal passages, each fine coal passage can realize suspension density independent measurement and the Flow-rate adjustment of coal, fine coal reacts with oxygen high-temp combustion and generates synthetic gas in vapourizing furnace, flying dust and slag, temperature of combustion in vapourizing furnace is set as 1550 DEG C, pressure is 4.0MPa, in stove, charcoal percent conversion reaches 99%, stove inner coil pipe water-cooled wall energy is by fine coal partial combustion recovery of heat, the middle pressure steam being converted into 5.4MPa exports, vapourizing furnace vaporizer discharge high-temperature synthesis gas and slag through chilling ring by after water Quench, shock chamber's water inlet bath is imported along downtake, slag rapid solidification, synthetic gas is by water saturation, chilling ring passes into chilled water, after this water sprays into water ring formation grid distributor by hole uniform on chilling ring, be uniformly distributed along grid distributor, make downtake tube wall forms water membrane, go out the synthetic gas of vapourizing furnace again through Venturi scrubber and the wetting washing further of synthesis gas washing tower water, the flying dust that removing is remaining, the slag of Quench after fixing is glass particle, drain in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated with water, be transported to middle slag field.
Brown coal granularity≤30mm before predrying.
In step (1), when the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is about 180 ~ 200 DEG C.
The invention has the advantages that:
(1) the present invention is in the type selecting of coal pulverizer, First air hotblast stove out being entered coal pulverizer distributes circlewise and enters, the hot blast temperature simultaneously ensureing to enter coal pulverizer is not more than the invert point of brown coal, ensures brown coal local surfaces not overtemperature, reduces the effusion of fugitive constituent in brown coal;
(2) adopt seal fan to carry out seal operation to Mill Systems in traditional gasification system, Controlling System oxygen content is for being not more than 8%.And the present invention adopts high volatilization brown coal to be raw material, control coal mill system, oxygen concentration is 4% to the maximum, in system, newly increase one low-pressure nitrogen add to coal pulverizer tightness system, nitrogen inlet in increase system simultaneously, reduces the impact to mill rod, reduces coal pulverizer vibration;
(3) temperature of combustion in vapourizing furnace of the present invention is set as 1550 DEG C, and pressure is 4.0MPa, higher than lime-ash yield temperature 150 ~ 200 DEG C.Under this temperature, pressure, can not only ensure that in stove, charcoal percent conversion reaches 99%, lime-ash has reasonable flow characteristics simultaneously.
Embodiment
embodiment 1
A kind of coal gasification method, concrete preparation process is as follows:
(1) coal-grinding and drying unit
The brown coal of granularity≤30mm are after predrying, broken brown coal granularity is less than 15mm, above-mentionedly rise to 45 meters high through pre-dried brown coal by bucket elevator, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, under gravity, pulverize in coal pulverizer is entered into by feeder, the hotblast stove First air entering coal pulverizer out distributes circlewise and enters, the temperature simultaneously controlling to enter the First air of coal pulverizer is not more than the invert point of brown coal, control temperature when the inert gas that produced by inert gas generator enters coal pulverizer import and be about 150 DEG C, when leaving coal pulverizer, temperature is about 100 ~ 105 DEG C, the oxygen level maximum volume per-cent controlled in coal pulverizer is 4%, the fine coal obtained after pulverizing carries out isolation of purified by fine coal deep bed filter, the particle size distribution specification of fine coal and the moisture content of fine coal meet following requirement:
The weight accounting of particle size≤90 μm is 90%;
It is 10% that the weight of particle size≤5 μm accounts for;
Water content < 5% weight;
(2) fine coal pressurization and conveying
In a pressurization addition programs, fine coal in normal pressure coal bunker loads fine coal lock hopper by action of gravity, after being full of fine coal in fine coal lock hopper, namely isolate with all low-voltage equipments, pressurize when being pressurized to and to batch can, there is identical pressure with fine coal complete, between fine coal lock hopper and fine coal are to batch can, compensation flap is opened, when powder lock hopper and fine coal to batch can, there is identical pressure and fine coal to the coal position in batch can be reduced to be enough to receive next batch fine coal time, two the lock hopper valves only need opening coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, once pressurization is completed reinforced to this, switching programme controls cut-off, the step-down of coal dust lock hopper and again coalings,
(3) vapourizing furnace gasification
Then fine coal is transported to gasifier nozzle from pressurization coal bunker, gasifier nozzle has three fine coal passages, each fine coal passage can realize suspension density independent measurement and the Flow-rate adjustment of coal, fine coal reacts with oxygen high-temp combustion and generates synthetic gas in vapourizing furnace, flying dust and slag, temperature of combustion in vapourizing furnace is set as 1550 DEG C, pressure is 4.0MPa, in stove, charcoal percent conversion reaches 99%, stove inner coil pipe water-cooled wall energy is by fine coal partial combustion recovery of heat, the middle pressure steam being converted into 5.4MPa exports, vapourizing furnace vaporizer discharge high-temperature synthesis gas and slag through chilling ring by after water Quench, shock chamber's water inlet bath is imported along downtake, slag rapid solidification, synthetic gas is by water saturation, chilling ring passes into chilled water, after this water sprays into water ring formation grid distributor by hole uniform on chilling ring, be uniformly distributed along grid distributor, make downtake tube wall forms water membrane, go out the synthetic gas of vapourizing furnace again through Venturi scrubber and the wetting washing further of synthesis gas washing tower water, the flying dust that removing is remaining, the slag of Quench after fixing is glass particle, drain in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated with water, be transported to middle slag field.
embodiment 2
A kind of coal gasification method, concrete preparation process is as follows:
(1) coal-grinding and drying unit
The brown coal of granularity≤30mm are after predrying, broken brown coal granularity is less than 15mm, above-mentionedly rise to 45 meters high through pre-dried brown coal by bucket elevator, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, under gravity, pulverize in coal pulverizer is entered into by feeder, the hotblast stove First air entering coal pulverizer out distributes circlewise and enters, the temperature simultaneously controlling to enter the First air of coal pulverizer is not more than the invert point of brown coal, control temperature when the inert gas that produced by inert gas generator enters coal pulverizer import and be about 200 DEG C, when leaving coal pulverizer, temperature is about 100 ~ 105 DEG C, the oxygen level maximum volume per-cent controlled in coal pulverizer is 4%, the fine coal obtained after pulverizing carries out isolation of purified by fine coal deep bed filter, the particle size distribution specification of fine coal and the moisture content of fine coal meet following requirement:
The weight accounting of particle size≤90 μm is 90%;
It is 10% that the weight of particle size≤5 μm accounts for;
Water content < 5% weight;
(2) fine coal pressurization and conveying
In a pressurization addition programs, fine coal in normal pressure coal bunker loads fine coal lock hopper by action of gravity, after being full of fine coal in fine coal lock hopper, namely isolate with all low-voltage equipments, pressurize when being pressurized to and to batch can, there is identical pressure with fine coal complete, between fine coal lock hopper and fine coal are to batch can, compensation flap is opened, when powder lock hopper and fine coal to batch can, there is identical pressure and fine coal to the coal position in batch can be reduced to be enough to receive next batch fine coal time, two the lock hopper valves only need opening coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, once pressurization is completed reinforced to this, switching programme controls cut-off, the step-down of coal dust lock hopper and again coalings,
(3) vapourizing furnace gasification
Then fine coal is transported to gasifier nozzle from pressurization coal bunker, gasifier nozzle has three fine coal passages, each fine coal passage can realize suspension density independent measurement and the Flow-rate adjustment of coal, fine coal reacts with oxygen high-temp combustion and generates synthetic gas in vapourizing furnace, flying dust and slag, temperature of combustion in vapourizing furnace is set as 1550 DEG C, pressure is 4.0MPa, in stove, charcoal percent conversion reaches 99%, stove inner coil pipe water-cooled wall energy is by fine coal partial combustion recovery of heat, the middle pressure steam being converted into 5.4MPa exports, vapourizing furnace vaporizer discharge high-temperature synthesis gas and slag through chilling ring by after water Quench, shock chamber's water inlet bath is imported along downtake, slag rapid solidification, synthetic gas is by water saturation, chilling ring passes into chilled water, after this water sprays into water ring formation grid distributor by hole uniform on chilling ring, be uniformly distributed along grid distributor, make downtake tube wall forms water membrane, go out the synthetic gas of vapourizing furnace again through Venturi scrubber and the wetting washing further of synthesis gas washing tower water, the flying dust that removing is remaining, the slag of Quench after fixing is glass particle, drain in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated with water, be transported to middle slag field.
embodiment 3
A kind of coal gasification method, concrete preparation process is as follows:
(1) coal-grinding and drying unit
The brown coal of granularity≤30mm are after predrying, broken brown coal granularity is less than 15mm, above-mentionedly rise to 45 meters high through pre-dried brown coal by bucket elevator, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, under gravity, pulverize in coal pulverizer is entered into by feeder, the hotblast stove First air entering coal pulverizer out distributes circlewise and enters, the temperature simultaneously controlling to enter the First air of coal pulverizer is not more than the invert point of brown coal, control temperature when the inert gas that produced by inert gas generator enters coal pulverizer import and be about 250 DEG C, when leaving coal pulverizer, temperature is about 100 ~ 105 DEG C, the oxygen level maximum volume per-cent controlled in coal pulverizer is 4%, the fine coal obtained after pulverizing carries out isolation of purified by fine coal deep bed filter, the particle size distribution specification of fine coal and the moisture content of fine coal meet following requirement:
The weight accounting of particle size≤90 μm is 90%;
It is 10% that the weight of particle size≤5 μm accounts for;
Water content < 5% weight;
(2) fine coal pressurization and conveying
In a pressurization addition programs, fine coal in normal pressure coal bunker loads fine coal lock hopper by action of gravity, after being full of fine coal in fine coal lock hopper, namely isolate with all low-voltage equipments, pressurize when being pressurized to and to batch can, there is identical pressure with fine coal complete, between fine coal lock hopper and fine coal are to batch can, compensation flap is opened, when powder lock hopper and fine coal to batch can, there is identical pressure and fine coal to the coal position in batch can be reduced to be enough to receive next batch fine coal time, two the lock hopper valves only need opening coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, once pressurization is completed reinforced to this, switching programme controls cut-off, the step-down of coal dust lock hopper and again coalings,
(3) vapourizing furnace gasification
Then fine coal is transported to gasifier nozzle from pressurization coal bunker, gasifier nozzle has three fine coal passages, each fine coal passage can realize suspension density independent measurement and the Flow-rate adjustment of coal, fine coal reacts with oxygen high-temp combustion and generates synthetic gas in vapourizing furnace, flying dust and slag, temperature of combustion in vapourizing furnace is set as 1550 DEG C, pressure is 4.0MPa, in stove, charcoal percent conversion reaches 99%, stove inner coil pipe water-cooled wall energy is by fine coal partial combustion recovery of heat, the middle pressure steam being converted into 5.4MPa exports, vapourizing furnace vaporizer discharge high-temperature synthesis gas and slag through chilling ring by after water Quench, shock chamber's water inlet bath is imported along downtake, slag rapid solidification, synthetic gas is by water saturation, chilling ring passes into chilled water, after this water sprays into water ring formation grid distributor by hole uniform on chilling ring, be uniformly distributed along grid distributor, make downtake tube wall forms water membrane, go out the synthetic gas of vapourizing furnace again through Venturi scrubber and the wetting washing further of synthesis gas washing tower water, the flying dust that removing is remaining, the slag of Quench after fixing is glass particle, drain in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated with water, be transported to middle slag field.
Claims (3)
1. a coal gasification method, is characterized in that concrete preparation process is as follows:
(1) coal-grinding and drying
Brown coal are after predrying, broken brown coal granularity is less than 15mm, above-mentionedly rise to 45 meters high through pre-dried brown coal by bucket elevator, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, under gravity, pulverize in coal pulverizer is entered into by feeder, the hotblast stove First air entering coal pulverizer out distributes circlewise and enters, the temperature simultaneously controlling to enter the First air of coal pulverizer is not more than the invert point of brown coal, control temperature when the inert gas that produced by inert gas generator enters coal pulverizer import and be about 150 ~ 250 DEG C, when leaving coal pulverizer, temperature is about 100 ~ 105 DEG C, the oxygen level maximum volume per-cent controlled in coal pulverizer is 4%, the fine coal obtained after pulverizing carries out isolation of purified by fine coal deep bed filter, the particle size distribution specification of fine coal and the moisture content of fine coal meet following requirement:
The weight accounting of particle size≤90 μm is 90%;
It is 10% that the weight of particle size≤5 μm accounts for;
Water content < 5% weight;
(2) fine coal pressurization and conveying
In a pressurization addition programs, fine coal in normal pressure coal bunker loads fine coal lock hopper by action of gravity, after being full of fine coal in fine coal lock hopper, namely isolate with all low-voltage equipments, pressurize when being pressurized to and to batch can, there is identical pressure with fine coal complete, between fine coal lock hopper and fine coal are to batch can, compensation flap is opened, when powder lock hopper and fine coal to batch can, there is identical pressure and fine coal to the coal position in batch can be reduced to be enough to receive next batch fine coal time, two the lock hopper valves only need opening coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, once pressurization is completed reinforced to this, switching programme controls cut-off, the step-down of coal dust lock hopper and again coalings,
(3) vapourizing furnace gasification
Then fine coal is transported to gasifier nozzle from pressurization coal bunker, gasifier nozzle has three fine coal passages, each fine coal passage can realize suspension density independent measurement and the Flow-rate adjustment of coal, fine coal reacts with oxygen high-temp combustion and generates synthetic gas in vapourizing furnace, flying dust and slag, temperature of combustion in vapourizing furnace is set as 1550 DEG C, pressure is 4.0MPa, in stove, charcoal percent conversion reaches 99%, stove inner coil pipe water-cooled wall energy is by fine coal partial combustion recovery of heat, the middle pressure steam being converted into 5.4MPa exports, vapourizing furnace vaporizer discharge high-temperature synthesis gas and slag through chilling ring by after water Quench, shock chamber's water inlet bath is imported along downtake, slag rapid solidification, synthetic gas is by water saturation, chilling ring passes into chilled water, after this water sprays into water ring formation grid distributor by hole uniform on chilling ring, be uniformly distributed along grid distributor, make downtake tube wall forms water membrane, go out the synthetic gas of vapourizing furnace again through Venturi scrubber and the wetting washing further of synthesis gas washing tower water, the flying dust that removing is remaining, the slag of Quench after fixing is glass particle, drain in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated with water, be transported to middle slag field.
2. coal gasification method according to claim 1, is characterized in that: the brown coal granularity≤30mm before predrying.
3. coal gasification method according to claim 1, is characterized in that: in step (1), and when the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is 180 ~ 200 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106398775A (en) * | 2016-12-01 | 2017-02-15 | 陕西特谷能源有限公司 | Coal gasification system |
| CN112178638A (en) * | 2020-08-28 | 2021-01-05 | 江中药业股份有限公司 | A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge |
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| CN100351349C (en) * | 2005-12-23 | 2007-11-28 | 李园 | Control method for powdered coal pressure and transferring program for powdered coal gasification |
| CN102021035B (en) * | 2010-11-24 | 2014-07-30 | 北京低碳清洁能源研究所 | System for preparing solid, liquid and gas products from coal and biomass and method using same |
| CN103146435B (en) * | 2013-02-18 | 2014-09-03 | 上海锅炉厂有限公司 | High-moisture coal pulverizing, drying and conveying apparatus and method thereof |
| CN203833895U (en) * | 2014-03-19 | 2014-09-17 | 上海鑫兴化工科技有限公司 | System for preparing synthesis gas by using feed coal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106398775A (en) * | 2016-12-01 | 2017-02-15 | 陕西特谷能源有限公司 | Coal gasification system |
| CN106398775B (en) * | 2016-12-01 | 2022-05-31 | 陕西特谷能源有限公司 | Coal gasification system |
| CN112178638A (en) * | 2020-08-28 | 2021-01-05 | 江中药业股份有限公司 | A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge |
| CN112178638B (en) * | 2020-08-28 | 2022-10-04 | 江中药业股份有限公司 | A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge |
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| Publication number | Publication date |
|---|---|
| CN104498102B (en) | 2016-09-14 |
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