CN103588168A - Technology for hydrogen making through direct injection of steam produced by combustion of coal gangue in deep underground coal - Google Patents
Technology for hydrogen making through direct injection of steam produced by combustion of coal gangue in deep underground coal Download PDFInfo
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- CN103588168A CN103588168A CN201310533873.4A CN201310533873A CN103588168A CN 103588168 A CN103588168 A CN 103588168A CN 201310533873 A CN201310533873 A CN 201310533873A CN 103588168 A CN103588168 A CN 103588168A
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The invention relates to a technology for efficient hydrogen making through direct injection of steam produced by long time combustion of coal gangue during combustion and gasification of deep underground coal. The technology makes full use of the natural favorable conditions of deep ground burial and tight sealing to make coal gangue combust simultaneously with coal during high temperature underground combustion and gasification of coal. Steam is directly injected to burning coal gangue, the high temperature heat energy generated by coal gangue combustion is utilized to make the steam undergo high temperature pyrolysis so as to generate hydrogen and oxygen. The oxygen generated by pyrolysis can further support coal gangue combustion, and the generated hydrogen can be recycled to generate huge added value. By using the technology provided by the invention, combustion of per ton of coal gangue can produce over 1000 cubic meters of hydrogen, so that the economic value is huge.
Description
Technical field
The present invention relates in deep layer underground coal combustion gasification process, utilize the efficient hydrogen technology of the direct spraying steam of burned for long time of coal gangue.
Background technology
Coal gangue is the solid waste of discharging in coal driving, exploitation and coal washing process.Be the mixture of carbonaceous, shale and sandy shale, there is certain calorific value.Carbon containing 20%～30% some containing humic acid.China has accumulated coal gangue approximately 1000 megatons, and still continues every year to discharge approximately 100 megatons, not only wastes in a large number soil, and spontaneous combustion can also occur, and polluted air or cause fire, can bring severe contamination to environment.Coal gangue is mainly used to produce the material of construction such as spoil cement, concrete, refractory brick at present, also can be used for reclaiming coal, and coal and the generating of spoil multifuel combustion, produce the Chemicals such as crystal aluminum chloride, water glass and extract valuable rare metal, also can make fertilizer.
Be imbedded in the coal of 600-3000 rice and accompany a large amount of coal gangues, if not only bring great disaster to environment by man-made recovery, but because coal gangue is combustible fossil, contain higher calorific value, combustion high temperature process by coal in coal underground combustion gasification is burnt coal gangue simultaneously.Compare the combustion time of coal, can extend 3-5 the combustion time of coal gangue doubly, in coal underground combustion gasification, the complete rear coal gangue of coal burning is also wanted sustained combustion 3-5 hour for this reason, and temperature of combustion is higher than 600 degrees Celsius.The present invention seeks to utilize burn straight spraying steam of coal gangue waste heat to produce nytron reaction hydrogen making technology.
Summary of the invention
The invention provides in a kind of deep layer underground coal the coal gangue straight spraying steam hydrogen technology of burning, this technology make full use of land disposal dark, seal tight natural favourable condition, coal gangue is burnt with coal in coal underground combustion temperature gasification and high process simultaneously.Water vapour is directly sprayed on the coal gangue of burning, the high temperature heat of utilizing coal gangue burning to produce makes water vapour Pintsch process produce hydrogen and oxygen.The oxygen that cracking produces can continue to support coal gangue burning, and the hydrogen of generation is recycled and can be produced huge value added.Utilize the technology of the present invention, coal gangue burning per ton can produce 1000 cubic metres of above hydrogen, and economic worth is huge.
The coal gangue straight spraying steam hydrogen technology of burning in a kind of deep layer underground coal that the present invention specifically provides, specifically comprises the following steps:
1, above coal seam, beat a bite straight well, at far-end, beat water horizontal well, horizontal well is to pass in inside, coal seam, utilizes coal underground combustion gasification technology that coal seam is lighted and carries out the gasification of coal underground combustion, in combustion gasification process, horizontal well continuous-tube is along with combustion processes is progressively dropped back;
2, through combustion gasification process, after coal burning is complete, there is space, now, the coal gangue dropping in space is still in sustained combustion, temperature of combustion is higher than 600 degrees Celsius, by the continuous-tube gas injection technology of stretching, the flexible continuous-tube of the gas input well of having dropped back when coal underground combustion is gasified extend in burning chamber again, and to the coal gangue of burning, sprays into appropriate high temperature and high pressure steam by being arranged on mesh on continuous-tube;
When 3, high-temperature high-pressure steam runs into the coal gangue of burning, can absorb the heat of coal gangue burning, scission reaction occurs, water vapour resolves in burning chamber to be had the hydrogen of efficient high value and the oxygen burning away is provided.The hydrogen producing is transported to gas recovery well extraction by the gas flow in coal underground combustion gasification again.
Reaction equation is 2H
2o=2H
2+ O
2,
H
2O+C＝CO+H
2，
H
2O+CO＝H
2+CO
2
By the present invention, can on the basis of coal available gas output, can increase more than 30% hydrogen energy, significantly improve hydrogen at the proportion of the mixed gas of underground coal gasification generation, realize the efficient high value of mixed gas of producing.Fundamentally stopped coal gangue with coal extraction after the problems such as energy dissipation, land occupation, potential safety hazard, pollution of band rice, and can utilize the heat energy of coal gangue burning to produce clean and effective hydrogen as energy source, be a safety and environmental protection, the pollution-free innovation innovative techniques of producing clean energy.
Accompanying drawing explanation
Fig. 1 is the coal gangue straight spraying steam hydrogen technology schematic diagram that burns in deep layer underground coal.
Embodiment
Utilize straight well horizontal well technology, in coal seam, carry out coal underground combustion, by controlling combustionvelocity and the degree of coal, realize the gasification of coal underground combustion.
Coal is in the process of underground combustion, the a large amount of coal gangues that are mingled with in coal are burnt simultaneously simultaneously, because coal gangue combustion processes is slow, be 3-5 times of coal burning combustion time, so after coal burning is complete, in the burning chamber space forming in burning, also have a large amount of coal gangues in sustained combustion, temperature of combustion is higher than 600 degrees Celsius.
First above coal seam, beat a bite straight well, at far-end, beat water horizontal well, horizontal well is to pass in inside, coal seam, utilizes coal underground combustion gasification technology that coal seam is lighted and carries out the gasification of coal underground combustion, in combustion gasification process, horizontal well continuous-tube is along with combustion processes is progressively dropped back.In combustion gasification process, there will be the space after burning, now, coal gangue in space is still in sustained combustion, by the continuous-tube gas injection technology of stretching, the flexible continuous-tube of gas input well using when coal underground combustion is gasified is deep in burning chamber, and to the coal gangue burning, sprays into appropriate high temperature and high pressure steam by the mesh being arranged on continuous-tube.When running into the coal gangue of burning, high-temperature high-pressure steam can absorb the heat of coal gangue burning, there is scission reaction, water vapour resolves in burning chamber to be had the hydrogen of efficient high value and the oxygen burning away is provided, the hydrogen producing, again by being transported to gas recovery well in Underground Coal Gasification Process, reaches the extraction of gas production pressure.
Claims (1)
1. the burn method of straight spraying steam hydrogen of coal gangue in deep layer underground coal, its feature is comprising the steps:
1, above coal seam, beat a bite straight well, at far-end, beat water horizontal well, horizontal well is to pass in inside, coal seam, utilizes coal underground combustion gasification technology that coal seam is lighted and carries out the gasification of coal underground combustion, in combustion gasification process, horizontal well continuous-tube is along with combustion processes is progressively dropped back;
2, through combustion gasification process, after coal burning is complete, there is space, now, the coal gangue dropping in space is still in sustained combustion, temperature of combustion is higher than 600 degrees Celsius, by the continuous-tube gas injection technology of stretching, the flexible continuous-tube of the gas input well of having dropped back when coal underground combustion is gasified extend in burning chamber again, and to the coal gangue of burning, sprays into appropriate high temperature and high pressure steam by being arranged on mesh on continuous-tube;
When 3, high-temperature high-pressure steam runs into the coal gangue of burning, can absorb the heat of coal gangue burning, scission reaction occurs, water vapour resolves in burning chamber to be had the hydrogen of efficient high value and the oxygen burning away is provided.The hydrogen producing is transported to gas recovery well extraction by the gas flow in coal underground combustion gasification again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310533873.4A CN103588168A (en) | 2013-11-01 | 2013-11-01 | Technology for hydrogen making through direct injection of steam produced by combustion of coal gangue in deep underground coal |
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| CN201310533873.4A CN103588168A (en) | 2013-11-01 | 2013-11-01 | Technology for hydrogen making through direct injection of steam produced by combustion of coal gangue in deep underground coal |
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| CN103588168A true CN103588168A (en) | 2014-02-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827957A (en) * | 2020-07-23 | 2020-10-27 | 栾天 | System and method for producing supercritical steam circulation power generation hydrogen by using dry hot rock heat energy |
| CN113653470A (en) * | 2021-10-21 | 2021-11-16 | 西南石油大学 | Coal bed in-situ hydrogen production and coal bed gas development integrated method and structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864941A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Ultra-deep coal underground gasification technology |
| CN101988384A (en) * | 2010-08-31 | 2011-03-23 | 新奥科技发展有限公司 | Method for in-situ retorting of underground coal bed by utilizing flue gas |
| CN102418476A (en) * | 2011-10-24 | 2012-04-18 | 国鼎(大连)投资有限公司 | Deep coal and coal bed gas combined mining method |
-
2013
- 2013-11-01 CN CN201310533873.4A patent/CN103588168A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864941A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Ultra-deep coal underground gasification technology |
| CN101988384A (en) * | 2010-08-31 | 2011-03-23 | 新奥科技发展有限公司 | Method for in-situ retorting of underground coal bed by utilizing flue gas |
| CN102418476A (en) * | 2011-10-24 | 2012-04-18 | 国鼎(大连)投资有限公司 | Deep coal and coal bed gas combined mining method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827957A (en) * | 2020-07-23 | 2020-10-27 | 栾天 | System and method for producing supercritical steam circulation power generation hydrogen by using dry hot rock heat energy |
| CN113653470A (en) * | 2021-10-21 | 2021-11-16 | 西南石油大学 | Coal bed in-situ hydrogen production and coal bed gas development integrated method and structure |
| CN113653470B (en) * | 2021-10-21 | 2022-04-29 | 西南石油大学 | Coal bed in-situ hydrogen production and coal bed gas development integrated method and structure |
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Application publication date: 20140219 |