CN102277201A - Method for preparing water gas by intermittent gasification of pulverized coal - Google Patents
Method for preparing water gas by intermittent gasification of pulverized coal Download PDFInfo
- Publication number
- CN102277201A CN102277201A CN2011101857704A CN201110185770A CN102277201A CN 102277201 A CN102277201 A CN 102277201A CN 2011101857704 A CN2011101857704 A CN 2011101857704A CN 201110185770 A CN201110185770 A CN 201110185770A CN 102277201 A CN102277201 A CN 102277201A
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- Prior art keywords
- gas
- main body
- coal
- fluidized
- enter
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- 239000007789 gas Substances 0.000 description 30
- 239000003245 coal Substances 0.000 description 23
- 238000002309 gasification Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 239000003034 coal gas Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000003517 fume Substances 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- KSSNXJHPEFVKHY-UHFFFAOYSA-N phenol;hydrate Chemical compound O.OC1=CC=CC=C1 KSSNXJHPEFVKHY-UHFFFAOYSA-N 0.000 description 3
- 239000002802 bituminous coal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention relates to a method for preparing water gas by intermittent gasification of pulverized coal, comprising the following steps: adding the pulverized coal into the main body of a fluidized bed; causing generated waste smoke to enter a cyclone separator from an outlet on the upper part of the main body of a fluidized bed; after separation, causing carbon particles to fall into a spiral material returning device to be sent back to the main body of a fluidized bed to be repeatedly gasified; causing the separated high-temperature smoke to enter a superheat seam heat exchanger via an outlet on the upper part; causing medium-temperature smoke subjected to heat exchange to enter the combustion chamber of a waste heat boiler; supplying steam generated by the waste heat boiler to the superheat seam heat exchanger via a steam pipeline so as to provide steam to the main body of the fluidized bed; causing glowing coal and steam to react to generate water gas; enabling the water gas enter into the cyclone separator by the main body of the fluidized bed for separation; causing the separated high-temperature coal gas to enter the superheat seam heat exchanger via an outlet on the upper part; and after the medium-temperature coal gas subjected to heat exchange is washed in a washing tower, inputting into a gas holder for storage. The method has the characteristics of lowering coal gas production cost and generating no phenol water pollution, also has the advantages of big gasification strength and high operation rate and is stable and reliable to operate.
Description
Technical field
The invention belongs to the gasification of coal field, particularly relate to the method that a kind of fine coal intermittent gasification is produced water-gas.
Background technology
At present, only do the method that vaporized chemical is produced water-gas with air and steam both at home and abroad, caloric power of gas reaches more than 2200 kilocalories, mainly is fixed bed (moving-bed) high-quality lump coal gasification technology, is characterized in the gas making of lump coal air vapor; Its advantage is that technology maturation, facility investment are few, and especially the intermittent type static bed coal gasification does not need pure oxygen, just can obtain the synthetic gas of nonnitrogenous gas with water vapour and air gas making; Its shortcoming: carbon residue contains (10%～30%) in the coal ash, the coal restriction is tight, gasification high-quality lump coal, calorific value is at 7000 kilocalories, cause many enterprises expense of raw materials height, production cost is high, and its type of furnace mainly contains single hop stove (GEGas, Shandong are strange, MERC etc.), two sections stoves (ATC/Wellman, FW-stoic, Rule-100) of dry method ash discharge, the slag tap fixed-bed gasification furnace (BGG/Lurgi, GFETC) of dry method ash discharge, and producing phenol water has pollution.
Summary of the invention
Purpose of the present invention is at the shortcoming of above-mentioned prior art, provide and utilize brown coal and low fine coal, the bituminous coal, cheap of going bad, production cost is lower, and gasification intensity is big, stable and reliable operation, operation factor height do not produce phenol water and pollute the method that few a kind of fine coal intermittent gasification is produced water-gas.
For this purpose, the present invention adopts following technical scheme:
A kind of fine coal intermittent gasification is produced the method for water-gas, the steps include: that fine coal adds in the fluidized-bed main body by screw-type coal distributor, air door is opened, the gas blower air feed, coal heats up in the fluidized-bed main body, the useless flue gas that produces, enter cyclonic separator through the outlet of fluidized-bed main body top, carbon granules falls into the spiral material returning device and sends gasification repeatedly in the fluidized-bed main body back to after separating, high-temperature flue gas after the separation, enter the superheated vapour interchanger from the top outlet, gas fume valve is opened, gas valve is closed simultaneously, middle temperature flue gas after the heat exchange enters the combustion chamber of waste heat boiler, the coal gas afterburnt that is come from gaspipe line, heat exchange is discharged from chimney once more, the steam that waste heat boiler produced passes through vapour line, supply with the superheated vapour interchanger, air door is closed, when steam valve is opened, in the fluidized-bed main body, provide steam, at this moment be the fluidized gasification time period, red-hot coal and steam reaction generate water-gas, still enter cyclonic separator by the outlet of fluidized-bed main body top and separate the back carbon granules and fall into the spiral material returning device and send the fluidized-bed main body back to and gasify repeatedly, coal gas of high temperature after the separation, enter the superheated vapour interchanger from the top outlet, the valve that turns on the gas-fire is closed gas fume valve simultaneously, after middle temperature coal gas after the process heat exchange entered the washing tower washing, the input gas holder stored.
The present invention has following characteristics: the one, utilize brown coal and low rotten fine coal, bituminous coal, cheap; The 2nd, gasification intensity is big; The 3rd, the production Load Regulation is flexible; The 4th, stable and reliable operation, operation factor height; The 5th, be vaporized chemical only with air and steam, methane content is just very high in the coal gas, and caloric power of gas is high 2200 kilocalories, is substantially free of tar; The 6th, the gas production cost is lower, and the 7th, system's operation comprehensive utilization of energy rate height, the 8th, do not produce phenol water and pollute, the 9th, dry ash extraction is simple in structure.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Number in the figure: 1. fluidized-bed main body, 2. cyclonic separator, 3. superheated vapour interchanger, 4. coal bunker, 5. screw-type coal distributor, 6 slag-drip openings, 7. air door, 8. gas blower, 9. steam valve 10. supplies user's gaspipe line, 11. spiral returning charge machines, 12. gas holder, 13. branch gas tubes, 14. replace pipeline, 15. vapour line, 16. gas valves, 17. waste heat boilers, 18. chimney, 19. gas fume valves, 20. vapour lines.
Embodiment
The fine coal that coal bunker is 4 li less than 6mm, add in the fluidized-bed main body 1 by screw-type coal distributor 5, air door 7 is opened, (gas blower 8 is by the Kai Heguan of air door 7 for gas blower 8 air feeds, come intermittently air feed, vapour line 15 is by the Kai Heguan of steam valve 9, realize intermittently for steam, air door 7 and steam 9 are by the time-interleaved switch of setting), coal heats up in the fluidized-bed main body, the useless flue gas of generation, and the top outlet of process main body 1 enters cyclonic separator 2, separating the back carbon granules falls into spiral material returning device 11 and sends fluidized-bed main body 1 back to and gasify repeatedly, high-temperature flue gas after the separation enters superheated vapour interchanger 3 from the top outlet, and gas fume valve 19 is opened, gas valve 16 is closed simultaneously, middle temperature cigarette after the heat exchange enters the combustion chamber of waste heat boiler 17, is come from the coal gas afterburnt of gaspipe line 13, and heat exchange is discharged from chimney 18 once more, the steam that waste heat boiler 17 is produced is supplied with superheated vapour interchanger 3 by vapour line 20; Air door 7 is closed, when steam valve 9 is opened, in fluidized-bed main body 1, provide steam, at this moment it is the fluidized gasification time period, red-hot coal and steam reaction generate water-gas, still the top outlet by fluidized-bed main body 1 enters cyclonic separator 2 and separates the back carbon granules and fall into spiral material returning device 11 and send fluidized-bed main body 1 back to and gasify repeatedly, coal gas of high temperature after the separation, enter superheated vapour interchanger 3 from the outlet of fluidized-bed main body 1 top, the valve 16 that turns on the gas-fire is closed gas fume valve 19 simultaneously, enter the washing tower washing through the middle temperature coal gas after the heat exchange after, input gas holder 12 stores, and uses by offer the user for user's gaspipe line 10.
Claims (1)
1. a fine coal intermittent gasification is produced the method for water-gas, it is characterized in that: fine coal adds in the fluidized-bed main body by screw-type coal distributor, air door is opened, the gas blower air feed, coal heats up in the fluidized-bed main body, the useless flue gas that produces, enter cyclonic separator through the outlet of fluidized-bed main body top, carbon granules falls into the spiral material returning device and sends gasification repeatedly in the fluidized-bed main body back to after separating, high-temperature flue gas after the separation, enter the superheated vapour interchanger from the top outlet, gas fume valve is opened, gas valve is closed simultaneously, middle temperature flue gas after the heat exchange enters the combustion chamber of waste heat boiler, the coal gas afterburnt that is come from gaspipe line, heat exchange is discharged from chimney once more, the steam that waste heat boiler produced passes through vapour line, supply with the superheated vapour interchanger, air door is closed, when steam valve is opened, in the fluidized-bed main body, provide steam, at this moment be the fluidized gasification time period, red-hot coal and steam reaction generate water-gas, still enter cyclonic separator by the outlet of fluidized-bed main body top and separate the back carbon granules and fall into the spiral material returning device and send the fluidized-bed main body back to and gasify repeatedly, coal gas of high temperature after the separation, enter the superheated vapour interchanger from the top outlet, the valve that turns on the gas-fire is closed gas fume valve simultaneously, after middle temperature coal gas after the process heat exchange entered the washing tower washing, the input gas holder stored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101857704A CN102277201A (en) | 2011-07-05 | 2011-07-05 | Method for preparing water gas by intermittent gasification of pulverized coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101857704A CN102277201A (en) | 2011-07-05 | 2011-07-05 | Method for preparing water gas by intermittent gasification of pulverized coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102277201A true CN102277201A (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101857704A Pending CN102277201A (en) | 2011-07-05 | 2011-07-05 | Method for preparing water gas by intermittent gasification of pulverized coal |
Country Status (1)
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| CN (1) | CN102277201A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108018088A (en) * | 2016-10-28 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of method of catalytic coal gasifaction |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323446A (en) * | 1979-08-30 | 1982-04-06 | Hydrocarbon Research, Inc. | Multi-zone coal conversion process using particulate carrier material |
| CN1057289A (en) * | 1990-06-09 | 1991-12-25 | 江苏工学院 | Water gas gasification method and device |
| CN1385500A (en) * | 2002-05-12 | 2002-12-18 | 郑州永泰能源新设备有限公司 | Fluidized bed water gas production method equipped with auxiliary bed reactor and installation thereof |
| CN1557919A (en) * | 2004-01-18 | 2004-12-29 | 江苏大学 | A kind of biomass and coal mixed fluidized bed gasification method and its device |
| CN2677377Y (en) * | 2004-01-18 | 2005-02-09 | 江苏大学 | Biological gasification furnace |
| CN1597871A (en) * | 2004-02-18 | 2005-03-23 | 江苏大学 | Technical process for gasification of fluidized-bed CO gasifying furnace and apparatus thereof |
| CN101391746A (en) * | 2007-09-17 | 2009-03-25 | 上海标氢气体技术有限公司 | Small-sized coal gasification hydrogen making method |
-
2011
- 2011-07-05 CN CN2011101857704A patent/CN102277201A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323446A (en) * | 1979-08-30 | 1982-04-06 | Hydrocarbon Research, Inc. | Multi-zone coal conversion process using particulate carrier material |
| CN1057289A (en) * | 1990-06-09 | 1991-12-25 | 江苏工学院 | Water gas gasification method and device |
| CN1385500A (en) * | 2002-05-12 | 2002-12-18 | 郑州永泰能源新设备有限公司 | Fluidized bed water gas production method equipped with auxiliary bed reactor and installation thereof |
| CN1557919A (en) * | 2004-01-18 | 2004-12-29 | 江苏大学 | A kind of biomass and coal mixed fluidized bed gasification method and its device |
| CN2677377Y (en) * | 2004-01-18 | 2005-02-09 | 江苏大学 | Biological gasification furnace |
| CN1597871A (en) * | 2004-02-18 | 2005-03-23 | 江苏大学 | Technical process for gasification of fluidized-bed CO gasifying furnace and apparatus thereof |
| CN101391746A (en) * | 2007-09-17 | 2009-03-25 | 上海标氢气体技术有限公司 | Small-sized coal gasification hydrogen making method |
Non-Patent Citations (1)
| Title |
|---|
| 王立群等: "流化床气化炉的制气工艺及其在制氢中的应用", 《江苏大学学报（自然科学版）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108018088A (en) * | 2016-10-28 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of method of catalytic coal gasifaction |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20111214 |