CN107629818A - A kind of broken coal gasification is using device and handling process of the carbon dioxide as coal lock gas - Google Patents
A kind of broken coal gasification is using device and handling process of the carbon dioxide as coal lock gas Download PDFInfo
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- CN107629818A CN107629818A CN201711044374.3A CN201711044374A CN107629818A CN 107629818 A CN107629818 A CN 107629818A CN 201711044374 A CN201711044374 A CN 201711044374A CN 107629818 A CN107629818 A CN 107629818A
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- carbon dioxide
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- 239000003245 coal Substances 0.000 title claims abstract description 355
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 78
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 77
- 238000002309 gasification Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 71
- 239000007789 gas Substances 0.000 claims description 79
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 62
- 239000002817 coal dust Substances 0.000 claims description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims description 31
- 239000004744 fabric Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 6
- 230000018199 S phase Effects 0.000 claims 1
- 239000003034 coal gas Substances 0.000 abstract description 7
- 229960004424 carbon dioxide Drugs 0.000 description 60
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 229910002090 carbon oxide Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 206010015856 Extrasystoles Diseases 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Pressure regulation tube line is all connected with using device and handling process of the carbon dioxide as coal lock gas, coal lock one and coal lock two the invention discloses a kind of crushed coal pressure gasifying, two pressure regulation tube lines are commonly connected to buffer tank outlet；Pressure-regulating valve one is set on the pressure regulation tube line being connected with coal lock one, pressure-regulating valve two is set on the pressure regulation tube line being connected with coal lock two；Coal is locked a pressure release and connected with coal fine filter by No.1 coal lock blowdown line, No.1 coal lock blowdown line sets pressure-regulating valve three and switch valve one, coal locks two pressure releases and connects No. two coal lock blowdown lines, No. two coal lock blowdown lines connect with No.1 coal lock blowdown line, and No. two coal lock blowdown lines set pressure-regulating valve four.The present invention rationally make use of punching press gas energy while meeting that the gasification of fixed bed broken coal requires, reduce coal gas discharge, and the gasification furnace of double coal lock setting is used suitable for fixed bed crushed coal pressure gasifying.
Description
Technical field
It is to be related to a kind of broken coal gas in particular the present invention relates to crushed coal pressurized-gasification furnace coal lock stamping technology field
Change using device and handling process of the carbon dioxide as coal lock gas.
Background technology
Crushed coal pressure gasifying coal lock punching press flow traditional design is coal gas punching press, and coal is locked to the coal of pressure release discharge by gas holder
After gas is collected, lock gas reciprocating compressor using coal and continue, to coal lock punching press, after the discharge of part coal gas directly to enter by coal gas boosting
Enter fuel gas pipe network, whole technological process floor space is larger, and operation is cumbersome.Part low-pressure gas is directly discharged to live torch
Middle burning.Follow-up coal gas refining step is (such as：Acid gas removal) substantial amounts of carbon dioxide can be discharged in operation, if by this
Portion gas is used for coal lock punching press after collecting pressurization, cancels traditional gas holder and collects discharge gas pressing technology, moreover it is possible to reduces a large amount of coals
The gas wasting of resources.
The content of the invention
The invention aims to overcome deficiency of the prior art, there is provided a kind of broken coal gasification is made using carbon dioxide
The device and handling process of gas are locked for coal, while meeting that the gasification of fixed bed broken coal requires, rationally make use of punching press gas energy,
Reduce coal gas discharge.
The purpose of the present invention can be achieved through the following technical solutions.
A kind of broken coal gasification of the present invention is provided with ash lock using device of the carbon dioxide as coal lock gas, including bottom
Gasification furnace, the top of gasification furnace are provided with coal lock one and coal lock two, and the coal locks a top pressure pipe and gasification furnace pressure power takes
Differential pressure controller one is connected between pressure pipe, the coal is locked is connected with pressure between two top pressure pipes and gasification furnace pressure power pressure pipe
Difference controller two, pressure-equalizing line is connected between the coal lock one and coal lock two, is provided with the pressure-equalizing line
Switch valve two,
The pressurising line inlet of the coal lock one and coal lock two is respectively connected with pressure regulation tube line, two pressure regulations
Pipeline is commonly connected to the gas outlet of surge tank, and the import of the surge tank is connected with carbon dioxide house steward；Connect with coal lock one
The pressure-regulating valve one with the interlocked control of differential pressure controller one is provided with the pressure regulation tube line connect, the pressure being connected with coal lock two
The pressure-regulating valve two with the interlocked control of differential pressure controller two is provided with power regulation pipeline；
The pressure relief vent of the coal lock one is locked blowdown line by No.1 coal with coal fine filter import and is connected, and described one
Gas flow direction is provided with pressure-regulating valve three and switch valve one on number coal lock blowdown line, the pressure release of the coal lock two goes out
Mouth is connected with No. two coal lock blowdown lines, and No. two coals lock blowdown line is connected with No.1 coal lock blowdown line, and described two
Pressure-regulating valve four is provided with number coal lock blowdown line；The pressure-regulating valve three and the interlocked control of differential pressure controller one, institute
State differential pressure controller one and differential pressure controller two with the interlocked control of switch valve one, the pressure-regulating valve four and differential pressure controller
Two interlocked controls.
The coal fine filter bottom is connected by coal dust discharge pipe line with coal powder collection device, the coal fine filter
Top is connected with blow-down pipe and blowback nitrogen pipeline, and back-flushing valve, the blowback nitrogen are provided with the blowback nitrogen pipeline
Differential pressure controller three, the differential pressure controller three and back-flushing valve interlocked control are connected between pipeline and coal fine filter cloth bag.
Threeway, No. two coals lock blowdown line and threeway phase are provided between the pressure-regulating valve three and switch valve one
Connection.
The purpose of the present invention can be also achieved through the following technical solutions.
A kind of handling process for locking gas as coal using carbon dioxide based on above-mentioned broken coal gasification of the present invention, including with
Lower step：
Step 1, when gasification furnace is initially driven, the supplying nitrogen into surge tank, rushed with nitrogen as coal lock punching press gas
Pressure；Wherein nitrogen pressure is higher 1.0~1.5MPa than gasification furnace pressure；
Step 2, in downstream unit after carbon-dioxide gas compressor normal operation, by carbon dioxide house steward by titanium dioxide
Carbon is introduced into surge tank；Wherein pressure carbon dioxide is higher 1.0~1.5MPa than gasification furnace pressure；
Step 3, coal lock punching press gas is regard carbon dioxide as by the pressure-regulating valve one of Staged cotrol and carried out to coal lock one
Punching press, until reaching the setting pressure of coal lock one；Simultaneously cavity rate and time are adjusted by differential pressure controller one；
Step 4, after the completion of coal locks a blanking, isolation coal lock one, switch valve two is opened, coal is locked into the titanium dioxide in one
Carbon locks punching press gas as coal and carries out punching press to coal lock two；
Step 5, after coal lock one and coal lock two pressure balances, closing switch valve two, beaten by the interlocking of differential pressure controller one
Pressure-regulating valve three and switch valve one are driven, remaining carbon dioxide is vented during coal is locked into one, while passes through differential pressure controller bigeminy
Lock opens pressure-regulating valve two and carries out punching press to coal lock two, until reaching the setting pressure of coal lock two；Controlled simultaneously through overpressure difference
Device two adjusts cavity rate and time；
Step 6, coal remaining carbon dioxide carrying part coal dust in locking one, pressure release is into coal fine filter, through cloth bag mistake
It is vented after filter, coal dust drains into coal powder collection device, closing presure regulating valve three and switch valve one after the completion of pressure release, and coal lock one is again
Feeding；
Step 7, after the completion of coal locks two blankings, isolation coal lock two, switch valve two is opened, coal is locked into the carbon dioxide in two
Punching press gas is locked as coal, and punching press is carried out to the coal lock one of feeding again；After coal lock one and coal lock two pressure balances, closing switch
Valve two, interlocked by differential pressure controller two and open pressure-regulating valve four and switch valve one, remaining carbon dioxide during coal is locked into two
Emptying；
Step 8, coal remaining carbon dioxide carrying part coal dust in locking two, pressure release is into coal fine filter, through cloth bag mistake
It is vented after filter, coal dust drains into coal powder collection device, closing presure regulating valve four and switch valve one after the completion of pressure release, and coal lock two is again
Feeding；After completing one cycle, three are repeated the above steps to step 8, carries out subsequent cycle.
Compared with prior art, beneficial effect caused by technical scheme is：
(1) present invention is for crushed coal pressure gasifying device, and the fixed bed pressured gasification stove particularly to maximize is using double coals
Material is locked into, the technique for collecting discharge gas pressurization by cancelling traditional gas holder and being used as coal and locking punching press gas, titanium dioxide is put using sour off the row
Carbon is pressurized buffered tank through compressor and enters pressurising pipe network, and alternately coal lock one and coal lock two are rushed by pressure difference control system
Pressure, more gasification furnaces can carry out regulation flow process of avoiding the peak hour in order in addition；
(2) present invention designs coal lock one and the form that pressure is mutually filled to each other of coal lock two under the pattern of single stove double coal lock,
The energy of release coal lock gas is made full use of, contrast raw coal lock gas punching press flow, emptying CO2 is recycled and locks punching press gas as coal,
Reduce emptying Gas Resource consumption；
(3) coal fine filter is set in the present invention, for the clean emission of coal lock pressure release gas, carried out using low-pressure nitrogen anti-
Blow, the coal dust that cloth bag in coal fine filter adheres to is purged, enable cloth bag to continue to adsorb coal dust, it is same to prevent that coal dust from wasting
When, environmental protection.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Reference:1 gasification furnace；2 coals lock one；3 coals lock two；4 ash locks；5 differential pressure controllers one；6 differential pressure controllers two；7
Differential pressure controller three；8 surge tanks；9 pressure-regulating valves one；10 pressure-regulating valves two；11 pressure-regulating valves three；12 switch valves one；
13 pressure-regulating valves four；14 back-flushing valves；15 coal fine filters；16 blow-down pipes；17 blowback nitrogen pipelines；18 gasifying agent input pipes
Line；19 synthesis gas discharge pipe lines；20 lime-ash discharge pipe lines；21 coal dust discharge pipe lines；22 pressure-equalizing lines；23 switch valves two；
24 pressure regulation tube lines；25 No.1 coals lock blowdown line；26 No. two coals lock blowdown line；27 threeways.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of broken coal gasification of the present invention is using device of the carbon dioxide as coal lock gas, including gasification furnace
1, for the gasification furnace 1 using broken coal pressurization counter current contacting continuous gasification dry ash extraction technique, it is defeated that the gasification furnace 1 includes gasifying agent
Enter pipeline 18 and synthesis gas discharge pipe line 19, the bottom of gasification furnace 1 is provided with ash lock 4, and 4 bottoms of ash lock are connected with lime-ash discharge
Pipeline 20.The top of gasification furnace 1 is provided with coal lock 1 and coal lock 23, and using double coal lock blanking, coal periodically locks 1 by coal
Added with coal lock 23 in gasification furnace 1, gasifying agent and the coal counter current contacting from coal lock 1 and coal lock 23, generate raw gas, coal
Caused ash after being reacted with gasifying agent, periodically purged out after ash locks 4 pressure releases.It is gentle that the coal locks one 2 top pressure pipes
Differential pressure controller 1 is connected between the change pressure pressure pipe of stove 1, the coal locks 23 top pressure pipes and the pressure pressure of gasification furnace 1
Differential pressure controller 26 is connected between pipe, pressure-equalizing line 22, the pressure are connected between the coal lock 1 and coal lock 23
Switch valve 2 23 is provided with dynamic balance pipeline 22.
The pressurising line inlet of the coal lock 1 and the pressurising line inlet of coal lock 23 are respectively connected with pressure regulation tube line
24, two pressure regulation tube lines 24 are commonly connected to the gas outlet of surge tank 8, and the import of the surge tank 8 and carbon dioxide are total
Pipe is connected, and the surge tank 8 is used to enter row buffering to the high-pressure carbon dioxide from carbon dioxide house steward.Connect with coal lock 1
Pressure-regulating valve 1 is provided with the pressure regulation tube line 24 connect, the pressure-regulating valve 1 interlocks with differential pressure controller 1
Control.With being provided with pressure-regulating valve 2 10 on the pressure regulation tube lines 24 that be connecteds of coal lock 23, the pressure-regulating valve 2 10 and
The interlocked control of differential pressure controller 26.
The pressure relief vent of the coal lock 1 is locked blowdown line 25 by No.1 coal with the import of coal fine filter 15 and is connected,
Gas flow direction is provided with pressure-regulating valve 3 11, threeway 27 and switch valve one on the No.1 coal lock blowdown line 25
12.The pressure relief vent of the coal lock 23 is connected with No. two coal lock blowdown lines 26, No. two coals lock blowdown line 26 and threeway
27 are connected, and pressure-regulating valve 4 13 is provided with No. two coals lock blowdown line 26.The pressure-regulating valve 3 11 and pressure
The interlocked control of difference controller 1, the differential pressure controller 1 and differential pressure controller 26 with the interlocked control of switch valve 1, institute
State pressure-regulating valve 4 13 and the interlocked control of differential pressure controller 26.
The bottom of coal fine filter 15 is connected by coal dust discharge pipe line 21 with coal powder collection device, the coal dust mistake
The top of filter 15 is connected with blow-down pipe 16 and blowback nitrogen pipeline 17, and back-flushing valve is provided with the blowback nitrogen pipeline 17
14, differential pressure controller 37, the differential pressure controller are connected between blowback nitrogen pipeline 17 and coal fine filter 15 cloth bag
37 and the interlocked control of back-flushing valve 14.The coal fine filter 15 uses bag type filtering technique, the clean row for coal lock pressure release gas
Put, blowback is carried out using low-pressure nitrogen, that is, opened using differential pressure control back-flushing valve 14, be passed through low-pressure nitrogen by pulverized-coal filtering
The coal dust that cloth bag adheres in device 15 purges, and enables cloth bag to continue to adsorb coal dust.
The pressure-regulating valve 1, pressure-regulating valve 2 10, pressure-regulating valve 3 11, pressure-regulating valve 4 13, switch valve
One 12, switch valve 2 23, differential pressure controller 1 and differential pressure controller 26 form the pressure difference control system of the present invention, for gasifying
The Stress control of the coal of stove 1 lock.The pressure difference control system passes through pressure-regulating valve 1, pressure-regulating valve 3 11, switch valve 1
The pressure of coal lock 1 is controlled with switch valve 2 23, the pressure difference control system passes through pressure-regulating valve 2 10, pressure-regulating valve four
13rd, switch valve 1 and switch valve 2 23 control the pressure of coal lock 23.
Broken coal gasification based on said apparatus specifically includes following step using handling process of the carbon dioxide as coal lock gas
Suddenly：
Step 1, when gasification furnace 1 is initially driven, the conveying high-pressure nitrogen into surge tank 8, punching is locked using high pressure nitrogen as coal
Calm the anger and punching press is carried out to coal lock 1 and coal lock 23；Wherein nitrogen pressure is higher 1.0~1.5MPa than the pressure of gasification furnace 1；
Step 2, in downstream unit after carbon-dioxide gas compressor normal operation, by carbon dioxide house steward by high pressure two
Carbonoxide is introduced into surge tank 8；Wherein pressure carbon dioxide is higher 1.0~1.5MPa than gasification furnace pressure.
Step 3, coal lock punching press gas is regard high-pressure carbon dioxide as by the pressure-regulating valve 1 of Staged cotrol and locked to coal
One 2 carry out punching press, until reach the setting pressure (the high 0.7~0.8MPa of pressure ratio gasification furnace pressure of coal lock one) of coal lock 1,
Cavity rate and time are adjusted by differential pressure controller 1 simultaneously.
Step 4, after the completion of coal locks one 2 blankings, isolation coal lock 1, switch valve 2 23 is opened, coal is locked into the height in one 2
Press carbon dioxide to lock punching press gas as coal and punching press is carried out to coal lock 23；
Step 5, after coal lock 1 and coal lock 23 pressure balances, closing switch valve 2 23, pass through differential pressure controller 1
Pressure-regulating valve 3 11 and switch valve 1 are opened in interlocking, carry out pressure release to coal lock 1, remaining titanium dioxide during coal is locked into 1
Carbon is vented, while is interlocked by differential pressure controller 26 and opened the progress punching press of 2 10 pairs of coal locks of pressure-regulating valve 23, until reaching
The setting pressure (the high 0.7~0.8MPa of pressure ratio gasification furnace pressure of coal lock two) of coal lock 23, while pass through differential pressure controller two
6 adjust cavity rate and time；
Step 6, coal remaining carbon dioxide carrying part coal dust in locking 1, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 3 11 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 1.
Step 7, after the completion of coal locks 23 blankings, isolation coal lock 23, switch valve 2 23 is opened, coal is locked into the high pressure in 23
Carbon dioxide locks punching press gas as coal and carries out punching press to the coal lock 1 of feeding again.Treat that coal lock 1 and coal lock 23 pressure balances
Afterwards, closing switch valve 2 23, interlocked by differential pressure controller 26 and open one 12 pairs of coal locks two of pressure-regulating valve 4 13 and switch valve
3 carry out pressure release, and remaining carbon dioxide is vented during coal is locked into 23；
Step 8, coal remaining carbon dioxide carrying part coal dust in locking 23, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 4 13 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 23；After completing one cycle, three are repeated the above steps to step 8, carries out subsequent cycle.
Embodiment 1
With coal lock volume 12M3, coal lock punching/release 4 times per hour, exemplified by gasifier operation pressure 4.0MPa：
Step 1, when gasification furnace 1 is initially driven, the conveying high-pressure nitrogen into surge tank 8, punching is locked using high pressure nitrogen as coal
Calm the anger and punching press is carried out to coal lock 1 and coal lock 23；Wherein nitrogen pressure is higher 1.0MPa than the pressure of gasification furnace 1；
Step 2, in downstream unit after carbon-dioxide gas compressor normal operation, by carbon dioxide house steward by high pressure two
Carbonoxide is introduced into surge tank 8；Wherein pressure carbon dioxide is higher 1.0MPa than gasification furnace pressure；
Step 3, coal lock punching press gas is regard high-pressure carbon dioxide as by the pressure-regulating valve 1 of Staged cotrol and locked to coal
One 2 carry out punching press, until reaching the setting pressure (the high 0.7MPa of pressure ratio gasification furnace pressure of coal lock one) of coal lock 1.Simultaneously
Cavity rate and time are adjusted by differential pressure controller 1.
Step 4, after the completion of coal locks one 2 blankings, isolation coal lock 1, switch valve 2 23 is opened, coal is locked into the height in one 2
Press carbon dioxide to lock punching press gas as coal and punching press is carried out to coal lock 23；
Step 5, after coal lock 1 and coal lock 23 pressure balances, closing switch valve 2 23, pass through differential pressure controller 1
Interlocking opens one 12 pairs of coal locks 1 of pressure-regulating valve 3 11 and switch valve and carries out pressure release, remaining carbon dioxide during coal is locked into 1
Emptying, while interlocked by differential pressure controller 26 and open the progress punching press of 2 10 pairs of coal locks of pressure-regulating valve 23, until reaching coal
Lock 23 setting pressure (the high 0.7MPa of pressure ratio gasification furnace pressure of coal lock two).
Step 6, coal remaining carbon dioxide carrying part coal dust in locking 1, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 3 11 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 1.
Step 7, after the completion of coal locks 23 blankings, isolation coal lock 23, switch valve 2 23 is opened, coal is locked into the high pressure in 23
Carbon dioxide locks punching press gas as coal and carries out punching press to the coal lock 1 of feeding again.Treat that coal lock 1 and coal lock 23 pressure balances
Afterwards, closing switch valve 2 23, interlocked by differential pressure controller 26 and open one 12 pairs of coal locks two of pressure-regulating valve 4 13 and switch valve
3 carry out pressure release, and remaining carbon dioxide is vented during coal is locked into 23；
Step 8, coal remaining carbon dioxide carrying part coal dust in locking 23, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 4 13 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 23；After completing one cycle, three are repeated the above steps to step 8, carries out subsequent cycle.
Emptying CO is recycled using this method2Punching press gas, the annual recoverable CO of every gasification furnace are locked as coal2Gas
1.42 ten thousand tons.Raw coal lock gas punching press flow is contrasted, reduces emptying Gas Resource consumption, reduces effective gas (CO, H2、CH4) emptying
Lose 28,920,000 NM3/ year.
Embodiment 2
With coal lock volume 12M3, coal lock punching/release 4 times per hour, exemplified by gasifier operation pressure 4.0MPa：
Step 1, when gasification furnace 1 is initially driven, the conveying high-pressure nitrogen into surge tank 8, punching is locked using high pressure nitrogen as coal
Calm the anger and punching press is carried out to coal lock 1 and coal lock 23；Wherein nitrogen pressure is higher 1.3MPa than the pressure of gasification furnace 1；
Step 2, in downstream unit after carbon-dioxide gas compressor normal operation, by carbon dioxide house steward by high pressure two
Carbonoxide is introduced into surge tank 8；Wherein pressure carbon dioxide is higher 1.3MPa than gasification furnace pressure.
Step 3, coal lock punching press gas is regard high-pressure carbon dioxide as by the pressure-regulating valve 1 of Staged cotrol and locked to coal
One 2 carry out punching press, until reaching the setting pressure (the high 0.75MPa of pressure ratio gasification furnace pressure of coal lock one) of coal lock 1.Simultaneously
Cavity rate and time are adjusted by differential pressure controller 1.
Step 4, after the completion of coal locks one 2 blankings, isolation coal lock 1, switch valve 2 23 is opened, coal is locked into the height in one 2
Press carbon dioxide to lock punching press gas as coal and punching press is carried out to coal lock 23；
Step 5, after coal lock 1 and coal lock 23 pressure balances, closing switch valve 2 23, pass through differential pressure controller 1
Interlocking opens one 12 pairs of coal locks 1 of pressure-regulating valve 3 11 and switch valve and carries out pressure release, remaining carbon dioxide during coal is locked into 1
Emptying, while interlocked by differential pressure controller 26 and open the progress punching press of 2 10 pairs of coal locks of pressure-regulating valve 23, until reaching coal
Lock 23 setting pressure (the high 0.75MPa of pressure ratio gasification furnace pressure of coal lock two).
Step 6, coal remaining carbon dioxide carrying part coal dust in locking 1, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 3 11 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 1.
Step 7, after the completion of coal locks 23 blankings, isolation coal lock 23, switch valve 2 23 is opened, coal is locked into the high pressure in 23
Carbon dioxide locks punching press gas as coal and carries out punching press to the coal lock 1 of feeding again.Treat that coal lock 1 and coal lock 23 pressure balances
Afterwards, closing switch valve 2 23, interlocked by differential pressure controller 26 and open one 12 pairs of coal locks two of pressure-regulating valve 4 13 and switch valve
3 carry out pressure release, and remaining carbon dioxide is vented during coal is locked into 23；
Step 8, coal remaining carbon dioxide carrying part coal dust in locking 23, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 4 13 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 23；After completing one cycle, three are repeated the above steps to step 8, carries out subsequent cycle.
Emptying CO is recycled using this method2Punching press gas, the annual recoverable CO of every gasification furnace are locked as coal2Gas
1.35 ten thousand tons.Raw coal lock gas punching press flow is contrasted, reduces emptying Gas Resource consumption, reduces effective gas (CO, H2、CH4) emptying
Lose 28,760,000 NM3/ year.
Embodiment 3
With coal lock volume 12M3, coal lock punching/release 4 times per hour, exemplified by gasifier operation pressure 4.0MPa：
Step 1, when gasification furnace 1 is initially driven, the conveying high-pressure nitrogen into surge tank 8, punching is locked using high pressure nitrogen as coal
Calm the anger and punching press is carried out to coal lock 1 and coal lock 23；Wherein nitrogen pressure is higher 1.5MPa than the pressure of gasification furnace 1；
Step 2, in downstream unit after carbon-dioxide gas compressor normal operation, by carbon dioxide house steward by high pressure two
Carbonoxide is introduced into surge tank 8；Wherein pressure carbon dioxide is higher 1.5MPa than gasification furnace pressure.
Step 3, coal lock punching press gas is regard high-pressure carbon dioxide as by the pressure-regulating valve 1 of Staged cotrol and locked to coal
One 2 carry out punching press, until reaching the setting pressure (the high 0.8MPa of pressure ratio gasification furnace pressure of coal lock one) of coal lock 1.Simultaneously
Cavity rate and time are adjusted by differential pressure controller 1.
Step 4, after the completion of coal locks one 2 blankings, isolation coal lock 1, switch valve 2 23 is opened, coal is locked into the height in one 2
Press carbon dioxide to lock punching press gas as coal and punching press is carried out to coal lock 23；
Step 5, after coal lock 1 and coal lock 23 pressure balances, closing switch valve 2 23, pass through differential pressure controller 1
Interlocking opens one 12 pairs of coal locks 1 of pressure-regulating valve 3 11 and switch valve and carries out pressure release, remaining carbon dioxide during coal is locked into 1
Emptying, while interlocked by differential pressure controller 26 and open the progress punching press of 2 10 pairs of coal locks of pressure-regulating valve 23, until reaching coal
Lock 23 setting pressure (the high 0.8MPa of pressure ratio gasification furnace pressure of coal lock two).
Step 6, coal remaining carbon dioxide carrying part coal dust in locking 1, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 3 11 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 1.
Step 7, after the completion of coal locks 23 blankings, isolation coal lock 23, switch valve 2 23 is opened, coal is locked into the high pressure in 23
Carbon dioxide locks punching press gas as coal and carries out punching press to the coal lock 1 of feeding again.Treat that coal lock 1 and coal lock 23 pressure balances
Afterwards, closing switch valve 2 23, interlocked by differential pressure controller 26 and open one 12 pairs of coal locks two of pressure-regulating valve 4 13 and switch valve
3 carry out pressure release, and remaining carbon dioxide is vented during coal is locked into 23；
Step 8, coal remaining carbon dioxide carrying part coal dust in locking 23, pressure release is into coal fine filter 15, through cloth
It is vented after bag filtering, coal dust is through collecting heel row to coal powder collection device, closing presure regulating valve 4 13 and switch after the completion of pressure release
Valve 1, the feeding again of coal lock 23；After completing one cycle, three are repeated the above steps to step 8, carries out subsequent cycle.
Emptying CO is recycled using this method2Punching press gas, the annual recoverable CO of every gasification furnace are locked as coal2Gas
1.33 ten thousand tons.Raw coal lock gas punching press flow is contrasted, reduces emptying Gas Resource consumption, reduces effective gas (CO, H2、CH4) emptying
Lose 28,600,000 NM3/ year.
Although the function and the course of work of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in
Above-mentioned concrete function and the course of work, above-mentioned embodiment is only schematical, rather than restricted, ability
The those of ordinary skill in domain is not departing from present inventive concept and scope of the claimed protection situation under the enlightenment of the present invention
Under, many forms can also be made, these are belonged within the protection of the present invention.
Claims (3)
1. a kind of broken coal gasification is provided with the gasification furnace of ash lock (4) using device of the carbon dioxide as coal lock gas, including bottom
(1) coal, is provided with the top of the gasification furnace (1) and locks two (3) of one (2) and coal lock, the coal locks pressure pipe and gasification at the top of one (2)
Differential pressure controller one (5) is connected between stove (1) pressure pressure pipe, the coal locks pressure pipe and gasification furnace (1) pressure at the top of two (3)
Differential pressure controller two (6) is connected between power pressure pipe, the coal is connected with pressure balance between locking two (3) of one (2) and coal lock
Pipeline (22), switch valve two (23) is provided with the pressure-equalizing line (22), it is characterised in that
The pressurising line inlet that the coal locks two (3) of one (2) and coal lock is respectively connected with pressure regulation tube line (24), two pressures
Power regulation pipeline (24) is commonly connected to the gas outlet of surge tank (8), import and the carbon dioxide house steward's phase of the surge tank (8)
Connection；The pressure with differential pressure controller one (5) interlocked control is provided with the pressure regulation tube line (24) being connected with one (2) of coal lock
Regulating valve one (9), lock and be provided with the pressure regulation tube line (24) that be connected of two (3) and differential pressure controller two (6) interlocking control with coal
The pressure-regulating valve two (10) of system；
The pressure relief vent that the coal locks one (2) is connected with coal fine filter (15) import by No.1 coal lock blowdown line (25)
Connect, gas flow direction is provided with pressure-regulating valve three (11) and switch valve one on the No.1 coal lock blowdown line (25)
(12), the pressure relief vent of described two (3) of coal lock is connected with No. two coals lock blowdown lines (26), and No. two coals lock blowdown line
(26) it is connected with No.1 coal lock blowdown line (25), pressure-regulating valve four is provided with No. two coals lock blowdown line (26)
(13)；The pressure-regulating valve three (11) and differential pressure controller one (5) interlocked control, the differential pressure controller one (5) and pressure difference
Controller two (6) interlocks with switch valve one (12) interlocked control, the pressure-regulating valve four (13) with differential pressure controller two (6)
Control.
2. broken coal gasification according to claim 1 is using device of the carbon dioxide as coal lock gas, it is characterised in that described
Coal fine filter (15) bottom is connected by coal dust discharge pipe line (21) with coal powder collection device, the coal fine filter (15)
Top is connected with blow-down pipe (16) and blowback nitrogen pipeline (17), and back-flushing valve is provided with the blowback nitrogen pipeline (17)
(14) differential pressure controller three (7), the pressure, are connected between the blowback nitrogen pipeline (17) and coal fine filter (15) cloth bag
Difference controller three (7) and back-flushing valve (14) interlocked control.
3. using handling process of the carbon dioxide as coal lock gas, it is special for a kind of broken coal gasification based on the claims 1 to 2
Sign is, comprises the following steps：
Step 1, when gasification furnace (1) is initially driven, the supplying nitrogen into surge tank (8), lock punching press gas with nitrogen as coal and carry out
Punching press；Wherein nitrogen pressure is higher 1.0~1.5MPa than gasification furnace (1) pressure；
Step 2, in downstream unit after carbon-dioxide gas compressor normal operation, carbon dioxide is drawn by carbon dioxide house steward
Enter in surge tank (8)；Wherein pressure carbon dioxide is higher 1.0~1.5MPa than gasification furnace (1) pressure；
Step 3, coal lock punching press gas is regard carbon dioxide as by the pressure-regulating valve one (9) of Staged cotrol and entered to one (2) of coal lock
Row punching press, until reaching the setting pressure that coal locks one (2)；Simultaneously by differential pressure controller one (5) come adjust cavity rate and when
Between；
Step 4, after the completion of coal locks (2) blanking, isolation coal locks one (2), opens switch valve two (23), and coal is locked in one (2)
Carbon dioxide as coal lock punching press gas to coal lock two (3) carry out punching press；
Step 5, after coal locks one (2) and coal locks two (3) pressure balances, closing switch valve two (23), pass through differential pressure controller one
(5) pressure-regulating valve three (11) and switch valve one (12) are opened in interlocking, and coal is locked into remaining carbon dioxide in one (2) is vented, together
When by differential pressure controller two (6) interlock open pressure-regulating valve two (10) to coal lock two (3) carry out punching press, until reach coal lock
The setting pressure of two (3)；Cavity rate and time are adjusted by differential pressure controller two (6) simultaneously；
Step 6, coal locks remaining carbon dioxide in one (2) and carries part coal dust, in pressure release to coal fine filter (15), through cloth
It is vented after bag filtering, coal dust drains into coal powder collection device, closing presure regulating valve three (11) and switch valve one after the completion of pressure release
(12), coal locks one (2) feeding again；
Step 7, after the completion of coal locks two (3) blankings, isolation coal locks two (3), opens switch valve two (23), and coal is locked in two (3)
Carbon dioxide locks punching press gas as coal and one (2) progress punching press is locked to the coal of feeding again；Treat that coal locks one (2) and coal locks two (3) pressure
After dynamic balance, closing switch valve two (23), interlocked by differential pressure controller two (6) and open pressure-regulating valve four (13) and switch valve
One (12), coal is locked into remaining carbon dioxide in two (3) and is vented；
Step 8, coal locks remaining carbon dioxide in two (3) and carries part coal dust, in pressure release to coal fine filter (15), through cloth
It is vented after bag filtering, coal dust drains into coal powder collection device, closing switch valve one (12) and pressure-regulating valve four after the completion of pressure release
(13), coal locks two (3) feeding again；After completing one cycle, three are repeated the above steps to step 8, carries out subsequent cycle.
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