CN101581210A - Method for extinguishing underground gasification furnace by charging nitrogen - Google Patents
Method for extinguishing underground gasification furnace by charging nitrogen Download PDFInfo
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- CN101581210A CN101581210A CNA2009100155355A CN200910015535A CN101581210A CN 101581210 A CN101581210 A CN 101581210A CN A2009100155355 A CNA2009100155355 A CN A2009100155355A CN 200910015535 A CN200910015535 A CN 200910015535A CN 101581210 A CN101581210 A CN 101581210A
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- nitrogen
- furnace
- gasification furnace
- extinguishing
- charging
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Abstract
The invention discloses a method for extinguishing an underground gasification furnace by charging nitrogen, which comprises the following steps: mounting a nitrogen making machine above ground; and charging the prepared nitrogen into the gasification furnace through an intake passage so as to break off oxygen for the gasification furnace, perform fire-extinguishing, and replace out the heat inside the furnace in the continuous charging process, and discharging the nitrogen out of the ground surface through a discharge pipe and cooling the nitrogen. The method has the advantages that because the nitrogen is incombustible and not comburent, and can break off the oxygen and replace out the residual heat in the furnace in the continuous charging process so that the residual coal in the furnace cannot generate after-combustion to achieve thorough furnace extinguishing, and the extinguishing is not threatened by dankness to achieve the aim of safety.
Description
Technical field
The present invention relates to coal underground gasification technology.
Background technology
Underground coal gasification(UCG) is with being in underground coal the burning of control to be arranged, the process that produces fuel gas by heat effect and chemical action to coal, coal underground gasification technology is a kind of safety, environmental protection, economic coal mining new method, the mine that is particularly useful for being difficult to below the km exploiting, scraps unworkable mine.The underground gasification station that China builds up moves for many years.The key technology of underground gasification is to set up underground gasification furnace, and underground gasification furnace is made up of inlet channel, exhaust passage, gasification tunnel and gasification coal seam.By from inlet channel manual firing and air blast in stove, along with constantly carrying out of burning, the fire district is to the steam vent side shifting, and whole coal seam is fallen in gasification, and the coal gas that coal seam gasification produces is transported to ground from the exhaust passage, after purifying as fuel and industrial chemicals.
When the gasification coal seam is about to after-flame can not normal gas producing the time, the coal column residual fire that still exists in the stove around residual coal, the stove, between the stove, it is complete to influence whole mine, so the stove that in time goes out of must taking measures.
Traditional stove method of going out has disconnected oxygen oven process and the water filling oven process that goes out that goes out.The disconnected oxygen oven process that goes out is to stop air feed in gasification furnace, closes access way, breaks off oxygen in the stove, and the disconnected oxygen of residual fire is extinguished.But, be easy to cause surplus temperature resume combustion because the furnace temperature reduction is slower.The water filling oven process that goes out is water filling in gasification furnace, the cooling fire extinguishing.But, there be certain threat in mine safety because gasification furnace inside ceiling panel and tomography have transmissibility.
Therefore be sought after a kind of safety stove method of going out completely.
Summary of the invention
The objective of the invention is to propose a kind of method for extinguishing underground gasification furnace by charging nitrogen completely fast and safely.
For reaching above-mentioned purpose, technical scheme of the present invention is: at the floor mounted nitrogen making machine, the nitrogen of making charges in the gasification furnace by inlet channel, thereby breaking off gasification furnace oxygen puts out a fire, and constantly charging in the process, furnace heat is cemented out, discharge ground from extract duct and lower the temperature, reach the purpose of the stove that fast and safely thoroughly goes out.
Good effect of the present invention is: because nitrogen does not burn not combustion-supporting, can play the purpose of disconnected oxygen, and after-heat cements out in constantly charging in the process stove, reach the following temperature of burning-point, make no longer resume combustion of residual coal in the stove, realize thoroughly going out stove, and be not subjected to permeable threat to reach purpose of safety.
The specific embodiment
A flow is installed greater than 200m between the former air blast in ground
3The nitrogen making machine of/h is connected the nitrogen making machine pipeline on the former blowing line, leads to each aperture of former inlet channel, then inflated with nitrogen in stove.In filling the nitrogen process, detect the nitrogen content and the outlet temperature of exhaust passage, reach more than 80% until nitrogen content, outlet temperature is reduced to below 40 ℃, the stove success of going out is described, and then changes blast fan into and in stove, fill air, displace nitrogen, make the gasification furnace air meet the coalmine ventilation safety standard, avoiding nitrogen to penetrate mine influences safety.
Claims (1)
1, a kind of method for extinguishing underground gasification furnace by charging nitrogen, it is characterized in that, it is at the floor mounted nitrogen making machine, the nitrogen of making charges in the gasification furnace by inlet channel, thereby breaking off gasification furnace oxygen puts out a fire, and constantly charging in the process, furnace heat is cemented out, discharge ground from extract duct and lower the temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100155355A CN101581210A (en) | 2009-05-15 | 2009-05-15 | Method for extinguishing underground gasification furnace by charging nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100155355A CN101581210A (en) | 2009-05-15 | 2009-05-15 | Method for extinguishing underground gasification furnace by charging nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101581210A true CN101581210A (en) | 2009-11-18 |
Family
ID=41363513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100155355A Pending CN101581210A (en) | 2009-05-15 | 2009-05-15 | Method for extinguishing underground gasification furnace by charging nitrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101581210A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9428978B2 (en) | 2012-06-28 | 2016-08-30 | Carbon Energy Limited | Method for shortening an injection pipe for underground coal gasification |
| US9435184B2 (en) | 2012-06-28 | 2016-09-06 | Carbon Energy Limited | Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification |
| CN106522914A (en) * | 2016-11-18 | 2017-03-22 | 中为（上海）化学有限公司 | Underground gasifier quenching and burnt-out area restoration treatment method for coal underground gasification process |
-
2009
- 2009-05-15 CN CNA2009100155355A patent/CN101581210A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9428978B2 (en) | 2012-06-28 | 2016-08-30 | Carbon Energy Limited | Method for shortening an injection pipe for underground coal gasification |
| US9435184B2 (en) | 2012-06-28 | 2016-09-06 | Carbon Energy Limited | Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification |
| US9963949B2 (en) | 2012-06-28 | 2018-05-08 | Carbon Energy Limited | Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification |
| US9976403B2 (en) | 2012-06-28 | 2018-05-22 | Carbon Energy Limited | Method for shortening an injection pipe for underground coal gasification |
| CN106522914A (en) * | 2016-11-18 | 2017-03-22 | 中为（上海）化学有限公司 | Underground gasifier quenching and burnt-out area restoration treatment method for coal underground gasification process |
| CN106522914B (en) * | 2016-11-18 | 2019-02-12 | 中为（上海）化学有限公司 | Underground gasification furnace parking and burned out area restoration processing method for coal underground gasifying technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091118 |