CN102635346B - Movable ignition system for UCG (underground coal gasification) - Google Patents
Movable ignition system for UCG (underground coal gasification) Download PDFInfo
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- CN102635346B CN102635346B CN201210110500.1A CN201210110500A CN102635346B CN 102635346 B CN102635346 B CN 102635346B CN 201210110500 A CN201210110500 A CN 201210110500A CN 102635346 B CN102635346 B CN 102635346B
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Abstract
The invention discloses a movable ignition system for UCG (underground coal gasification), which comprises a movable ignition device, an overground gas supply system and a gas feeding pipe, wherein the movable ignition device is arranged on underground coal; the overground gas supply system is connected with the ignition device through a gas pipeline, and is used for supplying ignition gas for the ignition device from the ground through the gas pipeline; and the gas feeding pipe passes through a coal bed and communicates the underground coal with the overground coal, and is used for providing ignition air or oxygen for the underground coal from the ground. The ignition system disclosed by the invention can overcome a defect that a traditional igniter can not carry out secondary ignition quickly when a flameout phenomenon occurs in the process of gasification, and can move arbitrarily according to the needs of ignition in the process of gasification, thereby guaranteeing the continuity and timeliness of an ignition process, and saving time and labor; the movable ignition system can enlarge the scale of a gasification furnace, reduce the number of drilled wells, lower the production cost, and improve the production progress; especially for the underground gasification of deep and ultra-deep coal, the ignition system can significantly lower the operation cost; and due to a single gas pipeline design, the ignition process is safer, and the explosion hazard is reduced.
Description
Technical field
The present invention relates to coal underground gasification technology association area, particularly relate to the portable ignition system of a kind of underground coal gasification(UCG).
Background technology
Coal is as the main energy sources of now and even from now on decades, and its efficient comprehensive mining utilizes and involves the interests of the state and the people.Particularly in energy-saving and emission-reduction under the new situation, clean coal technology application is brought into schedule by various countries.Underground coal gasification(UCG) is by gasifying agent is imported subterranean coal, makes coal carry out having the burning of control, and the fuel gas of generation is derived a kind of high-efficiency mining mode of being fully utilized again of ground.Coal underground gasification technology significantly effectively can reduce CO
2discharge, reduces ground pollution, particularly for deep coal, can also avoid the difficulty of drilling well aspect.
The first step of underground coal gasification(UCG) is lighting of coal seam.Burn under controlled conditions and can realize fuel gas as H in coal seam after lighting
2, CO and CH
4deng steady production.But the technology such as the igniting of existing coke, electric ignition and chemic ignition exist corresponding deficiency all separately, and compliance is weak, often because geological conditions is bad or the reason such as misoperation causes loss of ignition, or there is risk of explosion, add ignition difficulties and running cost.Moreover, current firing technique adopts stationary installation usually, arranging an igniter during application at a certain distance and form a underground gasification furnace, is that drilling hole number is more on the one hand, if be cannot rekindle in time rapidly when meeting with harsh conditions accident extinguishing in gasification on the other hand.In addition, existing fixed type ignition device can not realize continuity operation, and ignition effectiveness is low, operating process is unstable, and particularly, in traditional igniter, blast tube and air supply channel are positioned at the same side, if the unexpected breakage of pipeline easily causes explosion danger, there is some problems in safety.Therefore, be solve above-mentioned difficulties, be necessary to develop a kind of compliance and reliability is stronger, safer ignition system.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is to provide a kind of ignition system, can not realize to overcome existing firing technique the problem that continuity operates, ignition effectiveness is low, operating process is unstable and safety is low.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides the portable ignition system of a kind of underground coal gasification(UCG), it comprises and is arranged on the moveable igniter in coal underground; The ground gas feed system be connected by gas pipeline with described igniter, by described gas pipeline from ground to igniter supply igniting combustion gas; Coal underground and air inlet pipe is on the ground communicated with, by air inlet pipe from providing igniting air or oxygen to coal underground on the ground through coal seam.
Wherein, be arranged with mobile device, described igniter is arranged on described mobile device described coal, drives described igniter to move by described mobile device.
Wherein, described mobile device is provided with drive unit and shifting roller, described drive unit is connected with ground control system, controls described drive unit work by described ground control system.
Wherein, described ground control system is connected with described igniter, to control open and close or the igniting size of described igniter.
Wherein, described ground control system is all connected by data channel with igniter with described drive unit, and described data channel is built in described gas pipeline.
Wherein, described gas pipeline and air inlet pipe lay respectively at the relative both sides of described igniter.
Wherein, described air inlet pipe and gas pipeline all adopt the withstand voltage stainless steel flexible hose of fire-resistant oxidation resistant, and this flexible pipe institute bearing temperature is not less than 1000 DEG C.
Wherein, described drive unit and shifting roller adopt high temperature resistant withstand voltage anti-oxidant steel to make, and this steel institute bearing temperature is not less than 1000 DEG C.
(3) beneficial effect
The portable ignition system of the underground coal gasification(UCG) that technique scheme provides, conventional igniters when stopping working suddenly in gasification can be overcome and can not carry out rapidly the defect of regnition, it can according to the igniting demand movement arbitrarily of gasification, ensure the continuity of ignition process and ageing, time saving and energy saving; Portable ignition system can expand gasification furnace scale, reduces drilling hole number, reduces cost of production, improves manufacturing schedule, particularly for the underground gasification of deep layer and ultra-deep coal, significantly can reduce operating cost; Single Gas Pipeline Design makes ignition process safer, reduces explosion danger; Simple to operate, strong adaptability, ignition success rate is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the portable ignition system of underground coal gasification(UCG) of the embodiment of the present invention.
Wherein, 1: igniter, 2: gas outlet, 3: gas pipeline, 4: drive unit, 5: shifting roller, 6: data channel, 7: ground control system, 8: stack, 9: air inlet pipe, 10: coal seam.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Fig. 1 shows the structural representation of the portable ignition system of underground coal gasification(UCG) of the present embodiment, with reference to diagram, it comprises and is arranged on the moveable igniter 1 in coal underground, the ground gas feed system (not shown) be connected by gas pipeline 3 with described igniter 1, supplies igniting combustion gas by described gas pipeline 3 from ground to igniter 1; Coal underground and air inlet pipe 9 is on the ground communicated with through coal seam 10, by air inlet pipe 9 from providing igniting air or oxygen to coal underground on the ground, gas pipeline 3 and air inlet pipe 9 lay respectively at the relative both sides of described igniter 1, safety is good, the danger that when gas circuit accident can be avoided damaged, combustion-supporting gas and fuel gas are blasted before ignition.
May move through of igniter 1 arranges mobile device in coal underground, is arranged on described mobile device by described igniter 1, drives described igniter 1 to move by described mobile device.Particularly, as shown in Figure 1, mobile device is provided with drive unit 4 and shifting roller 5, described drive unit 4 is connected with ground control system 7, controls described drive unit 4 work by described ground control system 7.Ground control system 7 is also connected with igniter 1, is controlled open and close or the igniting size of described igniter 1 by ground control system 7.Ground control system 7 is all connected by data channel 6 with igniter 1 with described drive unit 4, and then realize the Long-distance Control of ground control system 7 pairs of ignition operations and position movement, described data channel 6 is built in described gas pipeline 3, to utilize in gas pipeline 3 the cold combustion gas passed through to cool it, ensure the smooth and easy transmission of data, igniter can reliable and stablely be run.
In the present embodiment, with air inlet pipe 9 homonymy, be also provided through coal seam 10 and be communicated with coal underground and stack 8 on the ground, pass into combustion-supporting gas air or oxygen by air inlet pipe 9 to coal underground, the product gas produced by Coal Gasification by stack 8 is discharged.Air inlet pipe 9, stack 8 and gas pipeline 3 all adopt the withstand voltage stainless steel flexible hose of fire-resistant oxidation resistant, and this flexible pipe institute bearing temperature is not less than 1000 DEG C, to light a fire the hot environment successfully to adapt to coal seam 10; Drive unit 4 and shifting roller 5 adopt high temperature resistant withstand voltage anti-oxidant steel to make, and this steel institute bearing temperature is not less than 1000 DEG C.
When using the ignition system of the present embodiment to light a fire, first will gas inlet pipe 9 and stack 8 be helped to put into the ad-hoc location in coal seam 10 and ensure that it is unimpeded, igniter 1 is positioned over the position of close coal seam 10 and air inlet pipe 9 by another boring, then air inlet pipe 9 starts to pass into oxygen rich gas, gas pipeline 3 passes into combustion gas methane, ethane, propane (C1-C6) or silane etc., open the ignition switch of ground control system 7, combustion gas takes fire, and around the temperature in coal seam starts to rise simultaneously; The gas started after igniting stack 8 is discharged carries out interval sample analysis; Along with coal seam temperature raises gradually, in the gas of discharge, the ratio of combustible component constantly increases, as the combustible component (H in exit gas
2+ CO+CH
4) content more than 20% time, think and light a fire successfully.Along with the carrying out of gasification, the gasification furnace that underground coal gasification(UCG) is formed constantly moves forward, if the prominent chance change of coal geology environment or other reasons cause coal seam to be extinguished in the process, gasification is interrupted, now igniter 1 is made to move to appropriate position by ground control system 7, again combustion gas is passed into, relight and sample analysis process, until the success of coal seam regnition.
The ignition system of the present embodiment not only constantly can move forward along the propelling of gasification furnace, drilling problem again when the mobility of system can effectively be avoided flame-out in gasification, and single Gas Pipeline Design makes ignition process reliably safer, classical ignition system can not carry out rapidly regnition in time shortcoming when gasification is dashed forward and met flame-out can be overcome, can effectively remedy ignition process shift position arbitrarily; The advantages such as this system has strong adaptability, simple to operate, safe and reliable, to there being well formula or all applicable without well formula, shallow-layer or deep coal underground gasification ignition process.
As can be seen from the above embodiments, the present invention is by arranging moveable igniter, conventional igniters when stopping working suddenly in gasification can be overcome and can not carry out rapidly the defect of regnition, it can according to the igniting demand movement arbitrarily of gasification, ensure the continuity of ignition process and ageing, time saving and energy saving; Portable ignition system can expand gasification furnace scale, reduces drilling hole number, reduces cost of production, improves manufacturing schedule, particularly for the underground gasification of deep layer and ultra-deep coal, significantly can reduce operating cost; Single Gas Pipeline Design makes ignition process safer, reduces explosion danger; Simple to operate, strong adaptability, ignition success rate is high.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (4)
1. the portable ignition system of underground coal gasification(UCG), is characterized in that, comprise and be arranged on the moveable igniter in coal underground; The ground gas feed system be connected by gas pipeline with described igniter, by described gas pipeline from ground to igniter supply igniting combustion gas; Coal underground and air inlet pipe is on the ground communicated with, by air inlet pipe from providing igniting air or oxygen to coal underground on the ground through coal seam; Be arranged with mobile device, described igniter is arranged on described mobile device described coal, drives described igniter to move by described mobile device; Described mobile device is provided with drive unit and shifting roller, described drive unit is connected with ground control system, controls described drive unit work by described ground control system; Described gas pipeline and air inlet pipe lay respectively at the relative both sides of described igniter; Described ground control system is all connected by data channel with igniter with described drive unit, and described data channel is built in described gas pipeline.
2. the portable ignition system of underground coal gasification(UCG) as claimed in claim 1, it is characterized in that, described ground control system is connected with described igniter, to control open and close or the igniting size of described igniter.
3. the portable ignition system of underground coal gasification(UCG) as claimed in claim 1, it is characterized in that, described air inlet pipe and gas pipeline all adopt the withstand voltage stainless steel flexible hose of fire-resistant oxidation resistant, and this flexible pipe institute bearing temperature is not less than 1000 DEG C.
4. the portable ignition system of underground coal gasification(UCG) as claimed in claim 1, is characterized in that, described drive unit and shifting roller adopt high temperature resistant withstand voltage anti-oxidant steel to make, and this steel institute bearing temperature is not less than 1000 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210110500.1A CN102635346B (en) | 2012-04-13 | 2012-04-13 | Movable ignition system for UCG (underground coal gasification) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210110500.1A CN102635346B (en) | 2012-04-13 | 2012-04-13 | Movable ignition system for UCG (underground coal gasification) |
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| CN102635346A CN102635346A (en) | 2012-08-15 |
| CN102635346B true CN102635346B (en) | 2015-01-07 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089294B (en) * | 2013-01-07 | 2015-07-01 | 韩永平 | Multi-well casing net-shaped device of coal bed gas exploration and coal underground gasification |
| CN104251133B (en) * | 2013-06-26 | 2018-02-23 | 新奥科技发展有限公司 | A kind of controllable gas injection point gas injection device, gas injection technology and gasification process |
| CN103712237B (en) * | 2013-12-30 | 2016-01-20 | 李昌卫 | A kind of horizontal open flow igniter |
| CN104314606B (en) * | 2014-08-15 | 2016-01-13 | 中国矿业大学 | Hydraulic slotted liner technique and the combined reinforced pumping method of gas explosion fracturing coal body in a kind of boring |
| CN104594873B (en) * | 2014-12-08 | 2019-02-05 | 新奥科技发展有限公司 | Coal underground gasifying furnace and gasification process |
| CA2985071A1 (en) * | 2015-06-15 | 2016-12-22 | Halliburton Energy Services, Inc. | Igniting underground energy sources |
| US11021943B2 (en) | 2016-08-24 | 2021-06-01 | Zhongwei (Sha Ghai) Energy Technology Co. Ltd | Ignition device for underground coal gasification process, and applications thereof |
| CN107815330A (en) * | 2017-08-11 | 2018-03-20 | 新疆国利衡清洁能源科技有限公司 | Prize-installation gas fluid fuel igniter and its ignition method |
| CN108729916A (en) * | 2018-07-17 | 2018-11-02 | 国氢能源科技有限公司 | A kind of underground gasification furnace coal seam igniter and retrogressing repeat igniting gasification method |
| CN112627791B (en) * | 2020-09-24 | 2023-04-25 | 山东科技大学 | Mobile ignition system, device and method for underground coal gasification |
| CN113090393B (en) * | 2021-04-07 | 2022-04-19 | 南京理工大学 | Device capable of igniting for multiple times based on solid energetic material |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420824C (en) * | 2005-04-21 | 2008-09-24 | 新奥气化采煤有限公司 | Underground coal gasification |
| US7735554B2 (en) * | 2007-03-29 | 2010-06-15 | Texyn Hydrocarbon, Llc | System and method for recovery of fuel products from subterranean carbonaceous deposits via an electric device |
| CN101382062A (en) * | 2007-09-07 | 2009-03-11 | 新奥科技发展有限公司 | Lane control gas supply side line underground gasification furnace |
| CN101382064B (en) * | 2008-09-04 | 2012-10-24 | 乌兰察布新奥气化采煤技术有限公司 | Underground forced oxidation and ignition technology for coal |
| CN101864942A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Remote automatic control technology of oxygen-enriched autogenous ignition and electric ignition in vertical well and horizontal well |
| CN101864941B (en) * | 2010-03-23 | 2013-08-28 | 邓惠荣 | Ultra-deep coal underground gasification technology |
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