CN103468281B - Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale - Google Patents
Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale Download PDFInfo
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- CN103468281B CN103468281B CN201310386172.2A CN201310386172A CN103468281B CN 103468281 B CN103468281 B CN 103468281B CN 201310386172 A CN201310386172 A CN 201310386172A CN 103468281 B CN103468281 B CN 103468281B
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Abstract
The invention relates to a method and a device for low temperature carbonization and pyrolysis of low-rank coal and oil shale. The method comprises the steps of preheating coal gas to 700-800 DEG C with a coal gas preheating device, and then allowing the coal gas to enter an internal thermal vertical retort suitable for hot coal gas carbonization through a pipeline for carbonization and growth into flame coal, non-caking coal and weakly caking coal, wherein the coal gas preheating device consists of a heating system and a preheating system. The method and the device have the advantages that the cooled coal gas is preheated by the coal gas preheating device; high-quality iron alloy coke and calcium carbide coke are produced through a heating mode of the vertical retort and improvement of a retort structure, contents of hydrogen and methane in the coal gas are increased simultaneously, a content of nitrogen is reduced, and a calorific value of the coal gas is increased. The method and the device provide high-quality raw materials for comprehensive utilization of the coal gas for hydrogen, methanol and LNG (liquefied natural gas) preparation, by-product coal tar and the coal gas can be further deeply processed, and a use value is increased.
Description
Technical field
The present invention relates to upright furnace technical field, especially relate to a kind of large-scale interior hot vertical type stove distillation process and the using appts that are applicable to heating gas charing low-rank coal and resinous shale.
Background technology
NORTHWEST CHINA area stores abundant low ash, low-sulfur, the long-flame coal of high-volatile, non-caking coal and weakly caking coal resource, this coal charge through destructive distillation except producing high-quality coke for ferroalloy, calcium carbide afocal, output coal tar and coal gas simultaneously.The further deep processing comprehensive utilization of coal tar oil and gas, coal gas is mainly used in hydrogen manufacturing, produces the clean fuel of the high added value such as methyl alcohol, LNG.But internal thermal upright stove is the hot waste gas charing coal charge adopting gas-fired to produce at present, and the caloric power of gas that charring furnace produces is low, and the content of hydrogen and methane is low, and nitrogen content is high.Which increase the cost of coal tar oil and gas following process, constrain the further deep processing comprehensive utilization of coal tar oil and gas to a certain extent.
Summary of the invention
For overcoming the deficiencies in the prior art, the object of this invention is to provide a kind of by the method for low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis and device, improving the content of hydrogen and methane in coal gas composition, reduce the content of nitrogen, improve caloric power of gas.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of by the method for low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis, coal gas is preheating to 700 ~ 800 DEG C by arrangement for gas preheating, then enter applicable internal thermal upright stove by low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis through piping, obtain semicoke, coal tar and high heating value gas.
Described arrangement for gas preheating is made up of heating system and pre-heating system:
Described firing system is use low-heat value gas as the regenerative combustion furnace of fuel, produces the high-temperature flue gas of 1000-1300 DEG C; Regenerative combustion furnace is provided with Two-cuff Technique burner, and inside is evenly equipped with radiator tube preheater;
Described pre-heating system is the radiator tube preheater be arranged in regenerative combustion furnace, and described radiator tube preheater forms primarily of radiator tube, and cooled coal gas and high-temperature flue gas carry out heat exchange by radiator tube preheater.
Described internal thermal upright stove is made up of porous coking chamber, be equipped with heating gas in coking chamber both sides, every hole and enter stove passage and auxiliary chamber, every hole coking chamber is wide at the top and narrow at the bottom, middle transverse section is variable cross-section, coking chamber top is provided with drapery panel, coking chamber top is provided with upcast, and furnace bottom passes into cooling coal gas; In coking chamber, establish gas to distribute brick, upright furnace is built into by refractory brick, and body of heater side is provided with auxiliary burning nozzle, and body of heater surrounding is provided with furnace retaining ironware.
Described low-rank coal is long-flame coal, non-caking coal, weakly caking coal or brown coal.
Described cooled coal gas is entered by pre-heating system one end, carries out heat exchange with high-temperature flue gas in radiator tube, after arriving preheating temperature, by the pre-heating system the other end out.
Described cooled coal gas enters in pipe by one end of radiator tube, carries out indirect heat exchange with the high-temperature flue gas outside radiator tube, arrives after preheating temperature, coal gas by radiator tube the other end out.
Compared with prior art, the invention has the beneficial effects as follows:
Cooled coal gas is through arrangement for gas preheating preheating, by the improvement of upright furnace type of heating and furnace binding, while producing high-quality coke for ferroalloy, calcium carbide Jiao, improve the content of hydrogen and methane in coal gas composition, reduce the content of nitrogen, improve caloric power of gas.For coal gas hydrogen manufacturing, produce methyl alcohol, LNG natural gas liquids etc. comprehensive utilization provide high quality raw material; The coal tar of by-product and coal gas can deep processings further, improve use value.
Accompanying drawing explanation
Fig. 1 is the front view of arrangement for gas preheating.
Fig. 2 is the vertical view of arrangement for gas preheating.
Fig. 3 is internal thermal upright furnace structure schematic diagram.
In figure: bottom 1-regenerative combustion furnace 2-, Two-cuff Technique burner 3-end Two-cuff Technique burner 4-radiator tube preheater 5-upcast 6-roof material distributing plate 7-coal charge 8-coking chamber 9-auxiliary chamber 10-heating gas enters stove passage 11-gas distribution brick 12-refractory brick 13-coke discharge box 14-auxiliary burning nozzle 15-furnace retaining ironware.
Embodiment
Below in conjunction with Figure of description, the present invention is described in detail, but it should be noted that enforcement of the present invention is not limited to following embodiment.
See Fig. 1-Fig. 3, a kind of by the method for low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis, coal gas is preheating to 700 ~ 800 DEG C by arrangement for gas preheating, then enter applicable internal thermal upright stove by low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis through piping, obtain semicoke, coal tar and high heating value gas.
Described arrangement for gas preheating is made up of heating system and pre-heating system:
Described firing system is use low-heat value gas as the regenerative combustion furnace 1 of fuel, produces the high-temperature flue gas of 1000-1300 DEG C; Regenerative combustion furnace 1 is provided with Two-cuff Technique burner, and inside is evenly equipped with radiator tube preheater 4;
Described pre-heating system is the radiator tube preheater 4 be arranged in regenerative combustion furnace 1, and described radiator tube preheater 4 is primarily of radiator tube composition, and cooled coal gas and high-temperature flue gas carry out heat exchange by radiator tube preheater 4.
Described internal thermal upright stove is made up of porous coking chamber 8, be equipped with heating gas in coking chamber 8 both sides, every hole and enter stove path 10 and auxiliary chamber 9, every hole coking chamber 8 is wide at the top and narrow at the bottom, middle transverse section is variable cross-section, coking chamber 8 top is provided with drapery panel, coking chamber 8 top is provided with upcast 5, and furnace bottom passes into cooling coal gas; In coking chamber 8, establish gas to distribute brick 11, upright furnace is built into by refractory brick 12, and body of heater side is provided with auxiliary burning nozzle 14, and body of heater surrounding is provided with furnace retaining ironware 15.
Described low-rank coal is long-flame coal, non-caking coal, weakly caking coal or brown coal.
Described cooled coal gas is entered by pre-heating system one end, carries out heat exchange with high-temperature flue gas in radiator tube, after arriving preheating temperature, by the pre-heating system the other end out.
Described cooled coal gas enters in pipe by one end of radiator tube, carries out indirect heat exchange with the high-temperature flue gas outside radiator tube, arrives after preheating temperature, coal gas by radiator tube the other end out.
Embodiment:
Arrangement for gas preheating comprises regenerative combustion furnace 1, and it uses low-heat value gas as fuel, and produce the high-temperature flue gas of 1000-1300 DEG C, the end of regenerative combustion furnace 1 and bottom are equipped with Two-cuff Technique burner, and inside is evenly equipped with radiator tube preheater 4; Regenerative combustion furnace 1 provides heat for arrangement for gas preheating, and radiator tube preheater 4 is the pre-heating system of arrangement for gas preheating, owing to have employed regenerative combustion technology, can improve gas utilization rate to greatest extent, reduces the consumption of fuel.
The low-heat value gas sent here by gas purification workshop burns through the bottom Two-cuff Technique burner 2 of regenerative combustion furnace 1 and end Two-cuff Technique burner 3 high-temperature flue gas producing about 1000-1300 DEG C, the cooled coal gas sent here by gas purification workshop is entered the radiator tube preheater 4 be arranged in roasting kiln, cooled coal gas enters in pipe by one end of radiator tube, indirect heat exchange is carried out with heat smoke in stove, after arriving 700 ~ 800 DEG C, by radiator tube the other end out, enter stove path 10 by pipeline and the heating gas of internal thermal upright stove and be connected.
Internal thermal upright stove is made up of porous coking chamber 8, and be provided with heating gas in coking chamber 8 both sides and enter stove path 10 and auxiliary chamber 9, every hole coking chamber 8 is wide at the top and narrow at the bottom, and middle transverse section is variable cross-section.Every 2 hole coking chambers 8 are 1 group, and centre refractory brick 12 wall separates, and every upright furnace can be arranged side by side porous coking chamber 8.Coking chamber 8 top is provided with drapery panel, and coking chamber 8 top is provided with upcast 5.In coking chamber 8, be provided with gas distribute brick 11.Body of heater side is provided with auxiliary coal gas burner, and body of heater exterior wall is provided with furnace retaining ironware 15.
Coal charge 7 enters coking chamber 8 through roof material distributing plate 6, coal charge 7 moves from top to bottom, with enter the heating gas of stove path 10 from heating gas and mix from the hot gas of auxiliary chamber 9, distribute brick 11 reverse contact by gas, coal charge 7 is heated, is carbonized coke, through the cooling coal gas cooling that the coke discharge box 13 of furnace bottom passes into, discharged by furnace bottom, the dry distillation gas of generation is derived by the upcast 5 of furnace roof.Upright furnace is built into by refractory brick 12, and body of heater side is provided with auxiliary burning nozzle 14, and body of heater surrounding is provided with furnace retaining ironware 15.
Cooled coal gas of the present invention is through arrangement for gas preheating preheating, by the improvement of upright furnace type of heating and furnace binding, while producing high-quality coke for ferroalloy, calcium carbide Jiao, improve the content of hydrogen and methane in coal gas composition, reduce the content of nitrogen, improve caloric power of gas.For coal gas hydrogen manufacturing, produce methyl alcohol, LNG natural gas liquids etc. comprehensive utilization provide high quality raw material; The coal tar of by-product and coal gas can deep processings further, improve use value.
Claims (1)
1. one kind by the method for low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis, it is characterized in that, coal gas is preheating to 700 ~ 800 DEG C by arrangement for gas preheating, then enter applicable internal thermal upright stove by low-rank coal and resinous shale low-temperature pyrolysis and pyrolysis through piping, obtain semicoke, coal tar and high heating value gas; Described arrangement for gas preheating is made up of heating system and pre-heating system: firing system is use low-heat value gas as the regenerative combustion furnace of fuel, produces the high-temperature flue gas of 1000-1300 DEG C; Regenerative combustion furnace is provided with Two-cuff Technique burner, and inside is evenly equipped with radiator tube preheater; Described pre-heating system is the radiator tube preheater be arranged in regenerative combustion furnace, and described radiator tube preheater forms primarily of radiator tube, and cooled coal gas and high-temperature flue gas carry out heat exchange by radiator tube preheater;
Described internal thermal upright stove is made up of porous coking chamber, be equipped with heating gas in coking chamber both sides, every hole and enter stove passage and auxiliary chamber, every hole coking chamber is wide at the top and narrow at the bottom, middle transverse section is variable cross-section, coking chamber top is provided with drapery panel, coking chamber top is provided with upcast, and furnace bottom passes into cooling coal gas; In coking chamber, establish gas to distribute brick, upright furnace is built into by refractory brick, and body of heater side is provided with auxiliary burning nozzle, and body of heater surrounding is provided with furnace retaining ironware.
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| CN201310386172.2A CN103468281B (en) | 2013-08-29 | 2013-08-29 | Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale |
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| CN201310386172.2A CN103468281B (en) | 2013-08-29 | 2013-08-29 | Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale |
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| CN103468281B true CN103468281B (en) | 2015-07-01 |
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| CN103788963B (en) * | 2014-02-22 | 2016-02-10 | 石家庄新华能源环保科技股份有限公司 | The blue charcoal stove of a kind of external-heat |
| CN103834417B (en) * | 2014-04-02 | 2015-10-28 | 青岛伊诺威能源化工新技术有限公司 | Horizontal laser heating, vertical coke discharging formula tampering coking oven |
| CN105255508A (en) * | 2015-11-18 | 2016-01-20 | 上海交通大学 | Poly-generation utilization system of oil shale with highly-volatile coal and process of system |
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| US4110193A (en) * | 1975-07-07 | 1978-08-29 | Shell Oil Company | Process for production of hydrocarbonaceous fluids from solids such as coal and oil shale |
| CN101012927A (en) * | 2007-02-13 | 2007-08-08 | 顾向涛 | Heat accumulation type low-oxidization heating furnace |
| CN101280201A (en) * | 2008-06-04 | 2008-10-08 | 珠海拓普能源科技有限公司 | Full cycle dry distillation process and system for producing shale oil from oil shale (coal) |
| CN202730059U (en) * | 2012-07-02 | 2013-02-13 | 中钢集团鞍山热能研究院有限公司 | Large-size internally heated vertical retort used for carbonized long flame coal, non-caking coal and weakly caking coal |
| CN103013544A (en) * | 2013-01-07 | 2013-04-03 | 中煤能源黑龙江煤化工有限公司 | Tunnel pipe thin-layer retort for coal and oil shale and retort process thereof |
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2013
- 2013-08-29 CN CN201310386172.2A patent/CN103468281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4110193A (en) * | 1975-07-07 | 1978-08-29 | Shell Oil Company | Process for production of hydrocarbonaceous fluids from solids such as coal and oil shale |
| CN101012927A (en) * | 2007-02-13 | 2007-08-08 | 顾向涛 | Heat accumulation type low-oxidization heating furnace |
| CN101280201A (en) * | 2008-06-04 | 2008-10-08 | 珠海拓普能源科技有限公司 | Full cycle dry distillation process and system for producing shale oil from oil shale (coal) |
| CN202730059U (en) * | 2012-07-02 | 2013-02-13 | 中钢集团鞍山热能研究院有限公司 | Large-size internally heated vertical retort used for carbonized long flame coal, non-caking coal and weakly caking coal |
| CN103013544A (en) * | 2013-01-07 | 2013-04-03 | 中煤能源黑龙江煤化工有限公司 | Tunnel pipe thin-layer retort for coal and oil shale and retort process thereof |
Non-Patent Citations (1)
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| 何德民.煤、油页岩热解与共热解研究.《中国优秀博硕士学位论文全文数据库(硕士),工程科技I辑》.2006,(第8期),第32页. * |
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