CN104498102B - A kind of coal gasification method - Google Patents
A kind of coal gasification method Download PDFInfo
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- CN104498102B CN104498102B CN201410824627.9A CN201410824627A CN104498102B CN 104498102 B CN104498102 B CN 104498102B CN 201410824627 A CN201410824627 A CN 201410824627A CN 104498102 B CN104498102 B CN 104498102B
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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
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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
- C10J3/72—Other features
- C10J3/723—Controlling or regulating the gasification process
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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
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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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
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
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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
- C10J2300/0903—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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- 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 present invention provides a kind of coal gasification method, and concrete preparation process includes: coal-grinding and dry, fine coal pressurization and conveying, gasification furnace gasification.The present invention is in the type selecting of coal pulverizer, the First air that air stove out enters coal pulverizer is distributed entrance circlewise, ensure that the hot blast temperature of entrance coal pulverizer is not more than the conversion temperature of brown coal, it is ensured that brown coal local surfaces not overtemperature simultaneously, reduce the effusion of fugitive constituent in brown coal；The present invention uses high volatilization brown coal to be raw material, controls coal mill system, and oxygen concentration is 4% to the maximum, newly increases one low-pressure nitrogen and adds to nitrogen inlet in coal pulverizer sealing system, increase system simultaneously, reduce the impact to mill rod in system, reduces coal pulverizer vibration；Ignition temperature in gasification furnace of the present invention is higher 150～200 DEG C than lime-ash flowing temperature.Under this temperature, pressure, in can not only ensureing stove, charcoal percent conversion reaches 99%, and lime-ash has reasonable flow behavior simultaneously.
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.Coal gasification is efficient, the coal utilization method of cleaning.The technology that coal gasification is commonly used now has oxygen-enriched continuous gasification, fluidized 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 a following defect:
(1) this technique oxygen, needs to build air separation unit, invests higher, and oxygen cost processed is high, and this is that restriction oxygen-enriched continuous gasification development uses the less main reason of this technique producer with small and medium ammonia synthesis plant.
(2) oxygen-enriched continuous gasification gas componant is poor, and carbon dioxide content is up to 15～20%, and methane content is up in 2%, and gas containing the Organic substance such as benzene, naphthalene.Great problem is brought to follow-up workshop section.Particularly methane and organic problem, currently without very good solution.
(3) the more difficult control of oxygen content in oxygen-enriched continuous gasification gas componant, brings potential safety hazard to follow-up workshop section.In order to control oxygen content in production process, the measure taked is to improve gas stove outlet temperature to be higher than 500 DEG C, and this measure causes again coal consumption and increases.
Fluidized gasification technology has a following defect:
Vapor pressure is normal pressure, and single stove vaporization ability also ratio is relatively low, and in product gas, CH4 content is up to 1.5-2%, and flying dust amount is big, environmental pollution and flying dust are stored up and had to be solved with problem of complex utilization
Double-section dry coal powder pressure gasifying technology has a following defect:
Gasification furnace uses water wall structure, and its shortcoming is CH in synthesis gas4Content is higher, unfavorable to system synthesis ammonia, methanol, hydrogen.
Summary of the invention
The problem existed for above-mentioned prior art, the present invention provides a kind of coal gasification method, and concrete preparation process is as follows:
(1) coal-grinding and drying unit
nullBrown coal are after predrying，Broken brown coal granularity is less than 15mm，Above-mentioned 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，Powdery is worn in entering into coal pulverizer by feeder，The air stove First air entering coal pulverizer out is distributed entrance circlewise，The temperature of the First air simultaneously controlling entrance coal pulverizer is not more than the conversion temperature of brown coal，When the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is about 150～250 DEG C，When leaving coal pulverizer, temperature is about 100～105 DEG C，The oxygen content maximum volume percentage ratio controlled in coal pulverizer is 4%，The fine coal obtained after pulverizing carries out isolation of purified by fine coal bag filter，The particle size distribution specification of fine coal and the moisture of fine coal meet claimed below:
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, i.e. isolate with all low-voltage equipments, pressurize when being pressurized to, with fine coal feedstock vessel, there is identical pressure complete, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have the coal potential drop in identical pressure and fine coal feedstock vessel be low enough to receive next group fine coal time, two the lock hopper valves that only need to open coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, charging of once pressurizeing is completed to this；Switching programme controls the cut-off of coal dust lock hopper, blood pressure lowering and again coalings；
(3) gasification furnace gasification
nullThen fine coal is transported to gasifier nozzle from pressurization coal bunker，Gasifier nozzle has three fine coal passages，Each fine coal passage is capable of suspension density independent measurement and the Flow-rate adjustment of coal，Fine coal reacts generation synthesis gas in gasification furnace with oxygen high-temp combustion、Flying dust and slag，Ignition temperature in gasification furnace is set as 1550 DEG C，Pressure is 4.0MPa，In stove, charcoal percent conversion reaches 99%，The fine coal part combustion heat is reclaimed by stove inner coil pipe water-cooled wall energy，It is converted into the middle pressure steam output of 5.4MPa，The high-temperature synthesis gas of gasification furnace vaporizer discharge and slag are after chilling ring is by water Quench，Shock chamber's water inlet bath is imported along down-comer，Slag solidifies rapidly，Synthesis gas is by water saturation，Chilling ring is passed through chilled water，After this water sprays into water ring formation distribution grid by hole uniform on chilling ring，It is uniformly distributed along distribution grid，Make to be formed on down-comer tube wall water membrane；The synthesis gas going out gasification furnace washs through Venturi scrubber and the further moistening of synthesis gas washing tower water again, removing remaining flying dust, after Quench, the slag of solidification is vitreous granule, drains in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated from water, it is 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.
It is an advantage of the current invention that:
(1) present invention is in the type selecting of coal pulverizer, the First air that air stove out enters coal pulverizer is distributed entrance circlewise, ensure that the hot blast temperature of entrance coal pulverizer is not more than the conversion temperature of brown coal, it is ensured that brown coal local surfaces not overtemperature simultaneously, reduce the effusion of fugitive constituent in brown coal；
(2) using seal fan that Mill Systems carries out seal operation in traditional gasification system, control system oxygen content is no more than 8%.And the present invention uses high volatilization brown coal to be raw material, controlling coal mill system, oxygen concentration is 4% to the maximum, in system, newly increase one low-pressure nitrogen add to coal pulverizer sealing system, nitrogen inlet in increase system simultaneously, reduces the impact to mill rod, reduces coal pulverizer vibration；
(3) ignition temperature in gasification furnace of the present invention is set as 1550 DEG C, and pressure is 4.0MPa, higher 150～200 DEG C than lime-ash flowing temperature.Under this temperature, pressure, in can not only ensureing stove, charcoal percent conversion reaches 99%, and lime-ash has reasonable flow behavior simultaneously.
Detailed description of the invention
Embodiment
1
A kind of coal gasification method, concrete preparation process is as follows:
(1) coal-grinding and drying unit
nullThe brown coal of granularity≤30mm are after predrying，Broken brown coal granularity is less than 15mm，Above-mentioned 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，Powdery is worn in entering into coal pulverizer by feeder，The air stove First air entering coal pulverizer out is distributed entrance circlewise，The temperature of the First air simultaneously controlling entrance coal pulverizer is not more than the conversion temperature of brown coal，When the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is about 150 DEG C，When leaving coal pulverizer, temperature is about 100～105 DEG C，The oxygen content maximum volume percentage ratio controlled in coal pulverizer is 4%，The fine coal obtained after pulverizing carries out isolation of purified by fine coal bag filter，The particle size distribution specification of fine coal and the moisture of fine coal meet claimed below:
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, i.e. isolate with all low-voltage equipments, pressurize when being pressurized to, with fine coal feedstock vessel, there is identical pressure complete, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have the coal potential drop in identical pressure and fine coal feedstock vessel be low enough to receive next group fine coal time, two the lock hopper valves that only need to open coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, charging of once pressurizeing is completed to this；Switching programme controls the cut-off of coal dust lock hopper, blood pressure lowering and again coalings；
(3) gasification furnace gasification
nullThen fine coal is transported to gasifier nozzle from pressurization coal bunker，Gasifier nozzle has three fine coal passages，Each fine coal passage is capable of suspension density independent measurement and the Flow-rate adjustment of coal，Fine coal reacts generation synthesis gas in gasification furnace with oxygen high-temp combustion、Flying dust and slag，Ignition temperature in gasification furnace is set as 1550 DEG C，Pressure is 4.0MPa，In stove, charcoal percent conversion reaches 99%，The fine coal part combustion heat is reclaimed by stove inner coil pipe water-cooled wall energy，It is converted into the middle pressure steam output of 5.4MPa，The high-temperature synthesis gas of gasification furnace vaporizer discharge and slag are after chilling ring is by water Quench，Shock chamber's water inlet bath is imported along down-comer，Slag solidifies rapidly，Synthesis gas is by water saturation，Chilling ring is passed through chilled water，After this water sprays into water ring formation distribution grid by hole uniform on chilling ring，It is uniformly distributed along distribution grid，Make to be formed on down-comer tube wall water membrane；The synthesis gas going out gasification furnace washs through Venturi scrubber and the further moistening of synthesis gas washing tower water again, removing remaining flying dust, after Quench, the slag of solidification is vitreous granule, drains in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated from water, it is 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
nullThe brown coal of granularity≤30mm are after predrying，Broken brown coal granularity is less than 15mm，Above-mentioned 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，Powdery is worn in entering into coal pulverizer by feeder，The air stove First air entering coal pulverizer out is distributed entrance circlewise，The temperature of the First air simultaneously controlling entrance coal pulverizer is not more than the conversion temperature of brown coal，When the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is about 200 DEG C，When leaving coal pulverizer, temperature is about 100～105 DEG C，The oxygen content maximum volume percentage ratio controlled in coal pulverizer is 4%，The fine coal obtained after pulverizing carries out isolation of purified by fine coal bag filter，The particle size distribution specification of fine coal and the moisture of fine coal meet claimed below:
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, i.e. isolate with all low-voltage equipments, pressurize when being pressurized to, with fine coal feedstock vessel, there is identical pressure complete, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have the coal potential drop in identical pressure and fine coal feedstock vessel be low enough to receive next group fine coal time, two the lock hopper valves that only need to open coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, charging of once pressurizeing is completed to this；Switching programme controls the cut-off of coal dust lock hopper, blood pressure lowering and again coalings；
(3) gasification furnace gasification
nullThen fine coal is transported to gasifier nozzle from pressurization coal bunker，Gasifier nozzle has three fine coal passages，Each fine coal passage is capable of suspension density independent measurement and the Flow-rate adjustment of coal，Fine coal reacts generation synthesis gas in gasification furnace with oxygen high-temp combustion、Flying dust and slag，Ignition temperature in gasification furnace is set as 1550 DEG C，Pressure is 4.0MPa，In stove, charcoal percent conversion reaches 99%，The fine coal part combustion heat is reclaimed by stove inner coil pipe water-cooled wall energy，It is converted into the middle pressure steam output of 5.4MPa，The high-temperature synthesis gas of gasification furnace vaporizer discharge and slag are after chilling ring is by water Quench，Shock chamber's water inlet bath is imported along down-comer，Slag solidifies rapidly，Synthesis gas is by water saturation，Chilling ring is passed through chilled water，After this water sprays into water ring formation distribution grid by hole uniform on chilling ring，It is uniformly distributed along distribution grid，Make to be formed on down-comer tube wall water membrane；The synthesis gas going out gasification furnace washs through Venturi scrubber and the further moistening of synthesis gas washing tower water again, removing remaining flying dust, after Quench, the slag of solidification is vitreous granule, drains in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated from water, it is 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
nullThe brown coal of granularity≤30mm are after predrying，Broken brown coal granularity is less than 15mm，Above-mentioned 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，Powdery is worn in entering into coal pulverizer by feeder，The air stove First air entering coal pulverizer out is distributed entrance circlewise，The temperature of the First air simultaneously controlling entrance coal pulverizer is not more than the conversion temperature of brown coal，When the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is about 250 DEG C，When leaving coal pulverizer, temperature is about 100～105 DEG C，The oxygen content maximum volume percentage ratio controlled in coal pulverizer is 4%，The fine coal obtained after pulverizing carries out isolation of purified by fine coal bag filter，The particle size distribution specification of fine coal and the moisture of fine coal meet claimed below:
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, i.e. isolate with all low-voltage equipments, pressurize when being pressurized to, with fine coal feedstock vessel, there is identical pressure complete, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have the coal potential drop in identical pressure and fine coal feedstock vessel be low enough to receive next group fine coal time, two the lock hopper valves that only need to open coal dust lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, charging of once pressurizeing is completed to this；Switching programme controls the cut-off of coal dust lock hopper, blood pressure lowering and again coalings；
(3) gasification furnace gasification
nullThen fine coal is transported to gasifier nozzle from pressurization coal bunker，Gasifier nozzle has three fine coal passages，Each fine coal passage is capable of suspension density independent measurement and the Flow-rate adjustment of coal，Fine coal reacts generation synthesis gas in gasification furnace with oxygen high-temp combustion、Flying dust and slag，Ignition temperature in gasification furnace is set as 1550 DEG C，Pressure is 4.0MPa，In stove, charcoal percent conversion reaches 99%，The fine coal part combustion heat is reclaimed by stove inner coil pipe water-cooled wall energy，It is converted into the middle pressure steam output of 5.4MPa，The high-temperature synthesis gas of gasification furnace vaporizer discharge and slag are after chilling ring is by water Quench，Shock chamber's water inlet bath is imported along down-comer，Slag solidifies rapidly，Synthesis gas is by water saturation，Chilling ring is passed through chilled water，After this water sprays into water ring formation distribution grid by hole uniform on chilling ring，It is uniformly distributed along distribution grid，Make to be formed on down-comer tube wall water membrane；The synthesis gas going out gasification furnace washs through Venturi scrubber and the further moistening of synthesis gas washing tower water again, removing remaining flying dust, after Quench, the slag of solidification is vitreous granule, drains in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated from water, it is transported to middle slag field.
Claims (2)
1. a coal gasification method, it is characterised in that concrete preparation process is as follows:
(1) coal-grinding and be dried
nullBrown coal are after predrying，Broken brown coal granularity is less than 15mm，Above-mentioned 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，Powdery is worn in entering into coal pulverizer by feeder，The air stove First air entering coal pulverizer out is distributed entrance circlewise，The temperature of the First air simultaneously controlling entrance coal pulverizer is not more than the conversion temperature of brown coal，When the inert gas controlling to be produced by inert gas generator enters coal pulverizer import, temperature is 180～200 DEG C，When leaving coal pulverizer, temperature is 100～105 DEG C，The oxygen content maximum volume percentage ratio controlled in coal pulverizer is 4%，The fine coal obtained after pulverizing carries out isolation of purified by fine coal bag filter，The particle size distribution specification of fine coal and the moisture of fine coal meet claimed below:
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, i.e. isolate with all low-voltage equipments, pressurize when being pressurized to, with fine coal feedstock vessel, there is identical pressure complete, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when fine coal lock hopper and fine coal feedstock vessel have the coal potential drop in identical pressure and fine coal feedstock vessel be low enough to receive next group fine coal time, two the lock hopper valves that only need to open fine coal lock hopper bottom just can pour coal into pressurization coal bunker from lock hopper, charging of once pressurizeing is completed to this；Switching programme controls the cut-off of fine coal lock hopper, blood pressure lowering and again coalings；
(3) gasification furnace gasification
nullThen fine coal is transported to gasifier nozzle from pressurization coal bunker，Gasifier nozzle has three fine coal passages，Each fine coal passage is capable of suspension density independent measurement and the Flow-rate adjustment of coal，Fine coal reacts generation synthesis gas in gasification furnace with oxygen high-temp combustion、Flying dust and slag，Ignition temperature in gasification furnace is set as 1550 DEG C，Pressure is 4.0MPa，In stove, charcoal percent conversion reaches 99%，The fine coal part combustion heat is reclaimed by stove inner coil pipe water-cooled wall energy，It is converted into the middle pressure steam output of 5.4MPa，The high-temperature synthesis gas of gasification furnace vaporizer discharge and slag are after chilling ring is by water Quench，Shock chamber's water inlet bath is imported along down-comer，Slag solidifies rapidly，Synthesis gas is by water saturation，Chilling ring is passed through chilled water，After this water sprays into water ring formation distribution grid by hole uniform on chilling ring，It is uniformly distributed along distribution grid，Make to be formed on down-comer tube wall water membrane；The synthesis gas going out gasification furnace washs through Venturi scrubber and the further moistening of synthesis gas washing tower water again, removing remaining flying dust, after Quench, the slag of solidification is vitreous granule, drains in dragveyer by dreg-locking hopper system at regular intervals, after chain type dragveyer makes it be separated from water, it is transported to middle slag field.
Coal gasification method the most according to claim 1, it is characterised in that: the brown coal granularity≤30mm before predrying.
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| CN106398775B (en) * | 2016-12-01 | 2022-05-31 | 陕西特谷能源有限公司 | Coal gasification system |
| 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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| CN102021035A (en) * | 2010-11-24 | 2011-04-20 | 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 |
| CN103146435A (en) * | 2013-02-18 | 2013-06-12 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1793290A (en) * | 2005-12-23 | 2006-06-28 | 李园 | Control method for powdered coal pressure and transferring program for powdered coal gasification |
| CN102021035A (en) * | 2010-11-24 | 2011-04-20 | 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 |
| CN103146435A (en) * | 2013-02-18 | 2013-06-12 | 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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