CN106520205A - Efficient coal gasification method - Google Patents
Efficient coal gasification method Download PDFInfo
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- CN106520205A CN106520205A CN201611055035.0A CN201611055035A CN106520205A CN 106520205 A CN106520205 A CN 106520205A CN 201611055035 A CN201611055035 A CN 201611055035A CN 106520205 A CN106520205 A CN 106520205A
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- coal
- synthesis 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
- 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
- C10J3/485—Entrained flow gasifiers
-
- 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
- C10J3/52—Ash-removing devices
- C10J3/526—Ash-removing devices for entrained flow gasifiers
-
- 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
-
- 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
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
-
- 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
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
Abstract
The invention provides an efficient coal gasification method. The method specifically comprises the preparation steps of coal grinding, drying, pressurizing and conveying of powdered coal and gasification through a gasifier. During model selection of a coal grinding machine, primary air which is discharged out of a hot blast heater and enters the coal grinding machine is distributed annularly for entering, and the effect that the hot blast temperature of the air entering the coal grinding machine is no higher than the translative temperature of brown coal is ensured, so that the temperature of the local surface of the brown coal is not excessive, and overflow of volatile matter in the brown coal is reduced; the high-volatility brown coal is used as raw materials, a coal grinding system is controlled, the maximum oxygen concentration is 4%, low-pressure nitrogen is additionally added into a system to be supplemented into a coal grinding machine sealing system, a nitrogen inlet in the system is enlarged, impact to grinding rods is reduced, and vibration of the coal grinding machine is reduced; and a hopper locking and discharging cycle can be started by a program, and the total discharging cycle time is 3 min, so that the whole process is high in automation degree and efficiency and short in used time.
Description
Technical field
The present invention relates to a kind of efficient coal gasification method, belongs to coal chemical technology.
Background technology
Coal is a kind of storage rich in natural resources.Coal gasification is efficient, cleaning coal utilization method.Current coal gasification is general
There are oxygen-enriched continuous gasification, fluidized gasification technology, double-section dry coal powder pressure gasifying technology etc. all over the technology for adopting.But it is above-mentioned
The equal existing defects of technology.
Oxygen-enriched continuous gasification has following defect：
(1) the technique oxygen, needs to build air separation unit, invests higher, and oxygen high cost processed, and this is that restriction is oxygen-enriched continuous
Gasification development and small and medium ammonia synthesis plant are using the less main reason of the technique producer.
(2) oxygen-enriched continuous gasification gas componant is poor, carbon dioxide content up to 15～20%, and methane content is up to 2%, and
Containing Organic substances such as benzene, naphthalenes in gas.Great problem is brought to follow-up workshop section.The particularly problem of methane and Organic substance, mesh
It is front there is no 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.Produced
In order to control oxygen content in journey, the measure taken is to improve coal gas heater outlet temperature higher than 500 DEG C, and this measure causes coal again
Consumption increases.
Fluidized gasification technology has following defect：
Vapor pressure is normal pressure, and also than relatively low, in product gas, CH4 contents are up to 1.5-2%, flying dust amount to single stove vaporization ability
Greatly, environmental pollution and flying dust are stored up has to be solved with problem of complex utilization
Double-section dry coal powder pressure gasifying technology has following defect：
Gasification furnace adopts water wall structure, and during which has the disadvantage synthesis gas, CH4 contents are higher, to system synthesis ammonia, methanol, hydrogen
It is unfavorable.
The content of the invention
For the problem that above-mentioned prior art is present, the present invention provides a kind of coal gasification method, and concrete preparation process is as follows：
(1) coal-grinding and drying unit
Jing after predrying, broken brown coal granularity is less than 15mm to brown coal, above-mentioned to pass through bucket elevator through pre-dried brown coal
45 meters high are lifted, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, in the work of gravity
With under, entered into by feeder and wear in coal pulverizer powdery, the First air of air stove entrance coal pulverizer out circlewise divides
Cloth is entered, while control is not more than the conversion temperature of brown coal into the temperature of the First air of coal pulverizer, controls to be sent out by noble gases
About 150～250 DEG C of temperature when the inert gas that raw device is produced enter coal pulverizer import, when leaving coal pulverizer, temperature is about 100
～105 DEG C, it is 4% to control the oxygen content maximum volume percentage ratio in coal pulverizer, and the fine coal obtained after crushing passes through fine coal pocket type
Filter carries out isolation of purified, and the moisture of the particle size distribution specification and fine coal of fine coal meets claimed below：
The weight accounting of particle size≤90 μm is 90%；
The weight of particle size≤5 μm is accounted for as 10%；
5% weight of water content ＜；
(2) fine coal pressurization and conveying
Pressurize at one in addition programs, the fine coal in normal pressure coal bunker loads fine coal lock hopper, fine coal lock by action of gravity
Full of after fine coal in bucket, i.e., isolate with all low-voltage equipments, pressurize when being pressurized to and there is identical pressure with fine coal feedstock vessel
Finish, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have identical
When coal potential drop in pressure and fine coal feedstock vessel is low enough to receive next group fine coal, need to only open coal dust lock hopper bottom two
Lock hopper valve just can pour coal into pressurization coal bunker from lock hopper, and charging of once pressurizeing is completed to this；Switching programme control coal dust lock hopper
Cut-off, blood pressure lowering and coaling again；
(3) gasification furnace gasification
Pressurize from coal and the fine coal of supply unit divides three tunnels to enter three coal pipes of gasifier nozzle, oxygen is preheated
After device heating first in the blender with a certain amount of steam, then enter burner by certain proportional quantity；Gasification furnace is by upper
Shock chamber's composition of the conversion zone and hypomere of section, fine coal high temperature imperfect combustion in the conversion zone, the synthesis gas of generation mainly into
It is divided into CO and H2, in shock chamber, synthesis gas is quenched and by water saturation, and slag solidifies rapidly, goes out the synthesis gas of gasification furnace scripture again
Qiu Li scrubbers and synthesis gas washing tower are washed with the further moistening of water, remove remaining flying dust, and the lime-ash of production is stayed in water
Rapid precipitation is simultaneously periodically discharged out-of-bounds by dreg-locking hopper；After synthesis gas goes out shock chamber, at the gasification furnace outlet conduit with spray into
Condensed fluid contacts, and blocks the mouth of pipe to prevent the ash particle carried secretly in crude synthesis gas from gathering at outlet conduit, then thick to close
Venturi scrubber is entered into gas, the chilled water directly contact that is pumped into chilled water forms atomization, crude synthesis gas further by
Humidification, the solid particle weightening being spontaneously wet out by water, the Accelerated subsidence in the synthesis gas washing tower；Synthesis gas gas-liquid mixture leaves literary mound
In submergence gas distribution tube in the liquid phase in synthesis gas washing tower is entered behind scrubber, scrubbing tower is ascended into Jing after water-bath
Middle part separated space, the micro granule carried secretly in gas and the drop of entrainment are fallen in washings in separated space, and gas is then
Further washed into four blocks of impact type washing column plates, the synthesis gas after washing enters the spiral board demister of top of tower, point
Separate out the synthesis gas after mist drop and leave scrubbing tower；In coal, about 65% ash leaves gasification zone with slag form, into Quench
Into vitreous body, in the bottom deposit of dreg-locking hopper, by break crusher machine, thick slag is deposited in gasification with other to the slag of bulk to room solidify afterwards
The solid of stove shock chamber bottom is transported in dreg-locking hopper by one recirculated water, and clean water out passes through slag lock again from the top of lock hopper
Bucket circulating pump is recycled to gasification furnace shock chamber.
Brown coal granularity≤30mm before predrying.
In step (1), when controlling to enter coal pulverizer import by the inert gas that inert gas generator is produced, temperature is about
180～200 DEG C.
It is an advantage of the current invention that：
(1) present invention in the type selecting of coal pulverizer, by air stove out into the First air of coal pulverizer be circlewise distributed into
Enter, while ensureing that the hot blast temperature into coal pulverizer is not more than the conversion temperature of brown coal, it is ensured that brown coal local surfaces not overtemperature, subtract
The effusion of fugitive constituent in few brown coal；
(2) seal operation is carried out using seal fan to Mill Systems in traditional gasification system, control system oxygen contains
Measure as no more than 8%.And the present invention adopts high volatilization brown coal for raw material, coal mill system is controlled, oxygen concentration is 4% to the maximum,
One low-pressure nitrogen is newly increased in system and adds to coal pulverizer sealing system, while nitrogen inlet in increase system, is reduced to mill
The impact of rod, reduces coal-grinding machine vibration；
(3) program can start lock hopper discharging circulation, and lock hopper is rushed to pipeline and lock hopper with buck after decompression
Wash, make slag and water be dumped into dragveyer.After the completion of discharging, dreg-locking hopper is pressurized under the effect of high pressure buck again, total discharging
Cyclic process (blood pressure lowering, discharging, the flushing, supercharging) time is about 3min.Thus it is clear that whole process high degree of automation, efficiency high,
Used time is short.
Specific embodiment
Embodiment 1
A kind of coal gasification method, concrete preparation process are as follows：
(1) coal-grinding and drying unit
Jing after predrying, broken brown coal granularity is less than 15mm to the brown coal of granularity≤30mm, above-mentioned through pre-dried brown
Coal is high to 45 meters by bucket elevator lifting, is stored up into gasification installation feed coal by the coal transporting trestle closed under nitrogen protection
Storehouse, under gravity, is entered into by feeder and wear in coal pulverizer powdery, and the one of air stove entrance coal pulverizer out
Secondary eolian annular distribution is entered, while control is not more than the conversion temperature of brown coal, control into the temperature of the First air of coal pulverizer
About 150 DEG C of temperature, temperature when leaving coal pulverizer when entering coal pulverizer import by the inert gas that inert gas generator is produced
About 100～105 DEG C, it is 4% to control the oxygen content maximum volume percentage ratio in coal pulverizer, and the fine coal obtained after crushing passes through powder
Coal bag filter carries out isolation of purified, and the moisture of the particle size distribution specification and fine coal of fine coal meets claimed below：
The weight accounting of particle size≤90 μm is 90%；
The weight of particle size≤5 μm is accounted for as 10%；
5% weight of water content ＜；
(2) fine coal pressurization and conveying
Pressurize at one in addition programs, the fine coal in normal pressure coal bunker loads fine coal lock hopper, fine coal lock by action of gravity
Full of after fine coal in bucket, i.e., isolate with all low-voltage equipments, pressurize when being pressurized to and there is identical pressure with fine coal feedstock vessel
Finish, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have identical
When coal potential drop in pressure and fine coal feedstock vessel is low enough to receive next group fine coal, need to only open coal dust lock hopper bottom two
Lock hopper valve just can pour coal into pressurization coal bunker from lock hopper, and charging of once pressurizeing is completed to this；Switching programme control coal dust lock hopper
Cut-off, blood pressure lowering and coaling again；
(3) gasification furnace gasification
Pressurize from coal and the fine coal of supply unit divides three tunnels to enter three coal pipes of gasifier nozzle, oxygen is preheated
After device heating first in the blender with a certain amount of steam, then enter burner by certain proportional quantity；Gasification furnace is by upper
Shock chamber's composition of the conversion zone and hypomere of section, fine coal high temperature imperfect combustion in the conversion zone, the synthesis gas of generation mainly into
It is divided into CO and H2, in shock chamber, synthesis gas is quenched and by water saturation, and slag solidifies rapidly, goes out the synthesis gas of gasification furnace scripture again
Qiu Li scrubbers and synthesis gas washing tower are washed with the further moistening of water, remove remaining flying dust, and the lime-ash of production is stayed in water
Rapid precipitation is simultaneously periodically discharged out-of-bounds by dreg-locking hopper；After synthesis gas goes out shock chamber, at the gasification furnace outlet conduit with spray into
Condensed fluid contacts, and blocks the mouth of pipe to prevent the ash particle carried secretly in crude synthesis gas from gathering at outlet conduit, then thick to close
Venturi scrubber is entered into gas, the chilled water directly contact that is pumped into chilled water forms atomization, crude synthesis gas further by
Humidification, the solid particle weightening being spontaneously wet out by water, the Accelerated subsidence in the synthesis gas washing tower；Synthesis gas gas-liquid mixture leaves literary mound
In submergence gas distribution tube in the liquid phase in synthesis gas washing tower is entered behind scrubber, scrubbing tower is ascended into Jing after water-bath
Middle part separated space, the micro granule carried secretly in gas and the drop of entrainment are fallen in washings in separated space, and gas is then
Further washed into four blocks of impact type washing column plates, the synthesis gas after washing enters the spiral board demister of top of tower, point
Separate out the synthesis gas after mist drop and leave scrubbing tower；In coal, about 65% ash leaves gasification zone with slag form, into Quench
Into vitreous body, in the bottom deposit of dreg-locking hopper, by break crusher machine, thick slag is deposited in gasification with other to the slag of bulk to room solidify afterwards
The solid of stove shock chamber bottom is transported in dreg-locking hopper by one recirculated water, and clean water out passes through slag lock again from the top of lock hopper
Bucket circulating pump is recycled to gasification furnace shock chamber.
Embodiment 2
A kind of coal gasification method, concrete preparation process are as follows：
(1) coal-grinding and drying unit
Jing after predrying, broken brown coal granularity is less than 15mm to the brown coal of granularity≤30mm, above-mentioned through pre-dried brown
Coal is high to 45 meters by bucket elevator lifting, is stored up into gasification installation feed coal by the coal transporting trestle closed under nitrogen protection
Storehouse, under gravity, is entered into by feeder and wear in coal pulverizer powdery, and the one of air stove entrance coal pulverizer out
Secondary eolian annular distribution is entered, while control is not more than the conversion temperature of brown coal, control into the temperature of the First air of coal pulverizer
About 200 DEG C of temperature, temperature when leaving coal pulverizer when entering coal pulverizer import by the inert gas that inert gas generator is produced
About 100～105 DEG C, it is 4% to control the oxygen content maximum volume percentage ratio in coal pulverizer, and the fine coal obtained after crushing passes through powder
Coal bag filter carries out isolation of purified, and the moisture of the particle size distribution specification and fine coal of fine coal meets claimed below：
The weight accounting of particle size≤90 μm is 90%；
The weight of particle size≤5 μm is accounted for as 10%；
5% weight of water content ＜；
(2) fine coal pressurization and conveying
Pressurize at one in addition programs, the fine coal in normal pressure coal bunker loads fine coal lock hopper, fine coal lock by action of gravity
Full of after fine coal in bucket, i.e., isolate with all low-voltage equipments, pressurize when being pressurized to and there is identical pressure with fine coal feedstock vessel
Finish, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have identical
When coal potential drop in pressure and fine coal feedstock vessel is low enough to receive next group fine coal, need to only open coal dust lock hopper bottom two
Lock hopper valve just can pour coal into pressurization coal bunker from lock hopper, and charging of once pressurizeing is completed to this；Switching programme control coal dust lock hopper
Cut-off, blood pressure lowering and coaling again；
(3) gasification furnace gasification
Pressurize from coal and the fine coal of supply unit divides three tunnels to enter three coal pipes of gasifier nozzle, oxygen is preheated
After device heating first in the blender with a certain amount of steam, then enter burner by certain proportional quantity；Gasification furnace is by upper
Shock chamber's composition of the conversion zone and hypomere of section, fine coal high temperature imperfect combustion in the conversion zone, the synthesis gas of generation mainly into
It is divided into CO and H2, in shock chamber, synthesis gas is quenched and by water saturation, and slag solidifies rapidly, goes out the synthesis gas of gasification furnace scripture again
Qiu Li scrubbers and synthesis gas washing tower are washed with the further moistening of water, remove remaining flying dust, and the lime-ash of production is stayed in water
Rapid precipitation is simultaneously periodically discharged out-of-bounds by dreg-locking hopper；After synthesis gas goes out shock chamber, at the gasification furnace outlet conduit with spray into
Condensed fluid contacts, and blocks the mouth of pipe to prevent the ash particle carried secretly in crude synthesis gas from gathering at outlet conduit, then thick to close
Venturi scrubber is entered into gas, the chilled water directly contact that is pumped into chilled water forms atomization, crude synthesis gas further by
Humidification, the solid particle weightening being spontaneously wet out by water, the Accelerated subsidence in the synthesis gas washing tower；Synthesis gas gas-liquid mixture leaves literary mound
In submergence gas distribution tube in the liquid phase in synthesis gas washing tower is entered behind scrubber, scrubbing tower is ascended into Jing after water-bath
Middle part separated space, the micro granule carried secretly in gas and the drop of entrainment are fallen in washings in separated space, and gas is then
Further washed into four blocks of impact type washing column plates, the synthesis gas after washing enters the spiral board demister of top of tower, point
Separate out the synthesis gas after mist drop and leave scrubbing tower；In coal, about 65% ash leaves gasification zone with slag form, into Quench
Into vitreous body, in the bottom deposit of dreg-locking hopper, by break crusher machine, thick slag is deposited in gasification with other to the slag of bulk to room solidify afterwards
The solid of stove shock chamber bottom is transported in dreg-locking hopper by one recirculated water, and clean water out passes through slag lock again from the top of lock hopper
Bucket circulating pump is recycled to gasification furnace shock chamber.
Embodiment 3
A kind of coal gasification method, concrete preparation process are as follows：
(1) coal-grinding and drying unit
Jing after predrying, broken brown coal granularity is less than 15mm to the brown coal of granularity≤30mm, above-mentioned through pre-dried brown
Coal is high to 45 meters by bucket elevator lifting, is stored up into gasification installation feed coal by the coal transporting trestle closed under nitrogen protection
Storehouse, under gravity, is entered into by feeder and wear in coal pulverizer powdery, and the one of air stove entrance coal pulverizer out
Secondary eolian annular distribution is entered, while control is not more than the conversion temperature of brown coal, control into the temperature of the First air of coal pulverizer
About 250 DEG C of temperature, temperature when leaving coal pulverizer when entering coal pulverizer import by the inert gas that inert gas generator is produced
About 100～105 DEG C, it is 4% to control the oxygen content maximum volume percentage ratio in coal pulverizer, and the fine coal obtained after crushing passes through powder
Coal bag filter carries out isolation of purified, and the moisture of the particle size distribution specification and fine coal of fine coal meets claimed below：
The weight accounting of particle size≤90 μm is 90%；
The weight of particle size≤5 μm is accounted for as 10%；
5% weight of water content ＜；
(2) fine coal pressurization and conveying
Pressurize at one in addition programs, the fine coal in normal pressure coal bunker loads fine coal lock hopper, fine coal lock by action of gravity
Full of after fine coal in bucket, i.e., isolate with all low-voltage equipments, pressurize when being pressurized to and there is identical pressure with fine coal feedstock vessel
Finish, between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have identical
When coal potential drop in pressure and fine coal feedstock vessel is low enough to receive next group fine coal, need to only open coal dust lock hopper bottom two
Lock hopper valve just can pour coal into pressurization coal bunker from lock hopper, and charging of once pressurizeing is completed to this；Switching programme control coal dust lock hopper
Cut-off, blood pressure lowering and coaling again；
(3) gasification furnace gasification
Pressurize from coal and the fine coal of supply unit divides three tunnels to enter three coal pipes of gasifier nozzle, oxygen is preheated
After device heating first in the blender with a certain amount of steam, then enter burner by certain proportional quantity；Gasification furnace is by upper
Shock chamber's composition of the conversion zone and hypomere of section, fine coal high temperature imperfect combustion in the conversion zone, the synthesis gas of generation mainly into
It is divided into CO and H2, in shock chamber, synthesis gas is quenched and by water saturation, and slag solidifies rapidly, goes out the synthesis gas of gasification furnace scripture again
Qiu Li scrubbers and synthesis gas washing tower are washed with the further moistening of water, remove remaining flying dust, and the lime-ash of production is stayed in water
Rapid precipitation is simultaneously periodically discharged out-of-bounds by dreg-locking hopper；After synthesis gas goes out shock chamber, at the gasification furnace outlet conduit with spray into
Condensed fluid contacts, and blocks the mouth of pipe to prevent the ash particle carried secretly in crude synthesis gas from gathering at outlet conduit, then thick to close
Venturi scrubber is entered into gas, the chilled water directly contact that is pumped into chilled water forms atomization, crude synthesis gas further by
Humidification, the solid particle weightening being spontaneously wet out by water, the Accelerated subsidence in the synthesis gas washing tower；Synthesis gas gas-liquid mixture leaves literary mound
In submergence gas distribution tube in the liquid phase in synthesis gas washing tower is entered behind scrubber, scrubbing tower is ascended into Jing after water-bath
Middle part separated space, the micro granule carried secretly in gas and the drop of entrainment are fallen in washings in separated space, and gas is then
Further washed into four blocks of impact type washing column plates, the synthesis gas after washing enters the spiral board demister of top of tower, point
Separate out the synthesis gas after mist drop and leave scrubbing tower；In coal, about 65% ash leaves gasification zone with slag form, into Quench
Into vitreous body, in the bottom deposit of dreg-locking hopper, by break crusher machine, thick slag is deposited in gasification with other to the slag of bulk to room solidify afterwards
The solid of stove shock chamber bottom is transported in dreg-locking hopper by one recirculated water, and clean water out passes through slag lock again from the top of lock hopper
Bucket circulating pump is recycled to gasification furnace shock chamber.
Claims (3)
1. a kind of efficient coal gasification method, it is characterised in that concrete preparation process is as follows：
(1) coal-grinding and drying
Jing after predrying, broken brown coal granularity is less than 15mm to brown coal, above-mentioned to be lifted by bucket elevator through pre-dried brown coal
It is high to 45 meters, gasification installation feed coal warehouse is entered under nitrogen protection by the coal transporting trestle closed, under gravity,
Entered into by feeder and wear in coal pulverizer powdery, the First air of air stove entrance coal pulverizer out be circlewise distributed into
Enter, while control is not more than the conversion temperature of brown coal into the temperature of the First air of coal pulverizer, control by inert gas generator
About 150～250 DEG C of temperature when the inert gas of generation enter coal pulverizer import, temperature about 100～105 when leaving coal pulverizer
DEG C, it is 4% to control the oxygen content maximum volume percentage ratio in coal pulverizer, and the fine coal obtained after crushing passes through fine coal bag filter
Isolation of purified is carried out, the moisture of the particle size distribution specification and fine coal of fine coal meets claimed below：
The weight accounting of particle size≤90 μm is 90%；
The weight of particle size≤5 μm is accounted for as 10%；
5% weight of water content ＜；
(2) fine coal pressurization and conveying
Pressurize at one in addition programs, the fine coal in normal pressure coal bunker loads fine coal lock hopper by action of gravity, in fine coal lock hopper
After full of fine coal, i.e., isolate with all low-voltage equipments, pressurize when being pressurized to and there is identical pressure with fine coal feedstock vessel and finish,
Between fine coal lock hopper and fine coal feedstock vessel, compensation flap is opened, when powder lock hopper and fine coal feedstock vessel have identical pressure and
When coal potential drop in fine coal feedstock vessel is low enough to receive next group fine coal, two lock hopper valves of coal dust lock hopper bottom need to be only opened
Just coal can be poured into pressurization coal bunker from lock hopper, charging of once pressurizeing is completed to this；The cut-off of switching programme control coal dust lock hopper, drop
Press and coaling again；
(3) gasification furnace gasification
Pressurize from coal and the fine coal of supply unit divides three tunnels to enter three coal pipes of gasifier nozzle, the preheated device of oxygen adds
After heat first in the blender with a certain amount of steam, then enter burner by certain proportional quantity；Gasification furnace is by epimere
Shock chamber's composition of conversion zone and hypomere, fine coal high temperature imperfect combustion in the conversion zone, the synthesis gas main component of generation is
CO and H2, in shock chamber, synthesis gas is quenched and by water saturation, and slag solidifies rapidly, goes out the synthesis gas of gasification furnace again in scripture mound
Scrubber and synthesis gas washing tower are washed with the further moistening of water, remove remaining flying dust, and the lime-ash of production is stayed in water rapidly
Precipitate and pass through dreg-locking hopper periodically to discharge out-of-bounds；Condensation after synthesis gas goes out shock chamber, at gasification furnace outlet conduit with penetrating
Liquid phase is contacted, and blocks the mouth of pipe to prevent the ash particle carried secretly in crude synthesis gas from gathering at outlet conduit, then crude synthesis gas
Into Venturi scrubber, the chilled water directly contact being pumped into chilled water forms atomization, and crude synthesis gas are further humidified,
The solid particle weightening being spontaneously wet out by water, the Accelerated subsidence in the synthesis gas washing tower；Synthesis gas gas-liquid mixture leaves venturi and washes
Submergence gas distribution tube in the liquid phase in synthesis gas washing tower is entered after washing device, the middle part of scrubbing tower is ascended into Jing after water-bath
Separated space, the micro granule carried secretly in gas and the drop of entrainment are fallen in washings in separated space, and gas is then entered
Four blocks of impact type washing column plates are further washed, and the synthesis gas after washing enters the spiral board demister of top of tower, isolates
Synthesis gas after mist drop leaves scrubbing tower；In coal, about 65% ash leaves gasification zone with slag form, into after shock chamber
Vitreous body is solidified into, in the bottom deposit of dreg-locking hopper, by break crusher machine, thick slag is deposited in gasification furnace with other and swashs the slag of bulk
The solid of cold house bottom is transported in dreg-locking hopper by one recirculated water, and clean water is out followed by dreg-locking hopper again from the top of lock hopper
Ring pump circulation is to gasification furnace shock chamber.
2. efficient coal gasification method according to claim 1, it is characterised in that：Brown coal granularity before predrying≤
30mm。
3. efficient coal gasification method according to claim 1, it is characterised in that：In step (1), control by noble gases
About 180～200 DEG C of temperature when the inert gas that generator is produced enter coal pulverizer import.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108795502A (en) * | 2018-08-21 | 2018-11-13 | 北京清创晋华科技有限公司 | A kind of dry coal powder airflow bed gasification system of low pressure and method |
| CN110283630A (en) * | 2019-07-27 | 2019-09-27 | 河南心连心化学工业集团股份有限公司 | A kind of coal chemical industry fixed-end forces device and processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104498096A (en) * | 2014-12-26 | 2015-04-08 | 富阳鸿祥技术服务有限公司 | Efficient coal gasification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104498096A (en) * | 2014-12-26 | 2015-04-08 | 富阳鸿祥技术服务有限公司 | Efficient coal gasification method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108795502A (en) * | 2018-08-21 | 2018-11-13 | 北京清创晋华科技有限公司 | A kind of dry coal powder airflow bed gasification system of low pressure and method |
| CN110283630A (en) * | 2019-07-27 | 2019-09-27 | 河南心连心化学工业集团股份有限公司 | A kind of coal chemical industry fixed-end forces device and processing method |
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