CN102635346B - Movable ignition system for UCG (underground coal gasification) - Google Patents
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- 239000003245 coal Substances 0.000 title claims abstract description 58
- 238000002309 gasification Methods 0.000 title claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims 1
- 230000003078 antioxidant effect Effects 0.000 claims 1
- 235000006708 antioxidants Nutrition 0.000 claims 1
- 239000000567 combustion gas Substances 0.000 claims 1
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 25
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000003064 anti-oxidating effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
本发明公开了一种煤炭地下气化移动式点火系统，包括设置在煤炭地下可移动的点火装置；与点火装置通过燃气管道相连的地面燃气供给系统，通过燃气管道从地面向点火装置供给点火用燃气；穿过煤层连通煤炭地下与地上的进气管，通过进气管从地上向煤炭地下提供点火用空气或氧气。本发明可以克服气化过程中突然熄火时传统点火器不能迅速进行二次点火的缺陷，可根据气化过程的点火需求任意移动，保证点火过程的连续性和时效性，省时省力；移动式点火系统可扩大气化炉规模，减少钻井数量，降低生产成本，提高生产进度，尤其对于深层和超深层煤炭的地下气化，能够显著降低运行费用；单燃气管道设计使得点火过程更安全，减少爆炸危险。
The invention discloses a mobile ignition system for underground coal gasification, which includes a movable ignition device arranged underground in coal; a ground gas supply system connected with the ignition device through a gas pipeline, and supplies ignition equipment from the ground to the ignition device through the gas pipeline. Gas: through the coal seam, the air intake pipe connecting the coal underground and the ground is provided, and the air or oxygen for ignition is provided from the ground to the coal underground through the air intake pipe. The invention can overcome the defect that the traditional igniter cannot quickly perform secondary ignition when the gasification process is suddenly turned off, and can be moved arbitrarily according to the ignition requirements of the gasification process, ensuring the continuity and timeliness of the ignition process, saving time and effort; mobile The ignition system can expand the scale of the gasifier, reduce the number of drilling wells, reduce production costs, and improve production progress, especially for underground gasification of deep and ultra-deep coal, which can significantly reduce operating costs; the single gas pipeline design makes the ignition process safer and reduces Explosion hazard.
Description
技术领域 technical field
本发明涉及煤炭地下气化技术相关领域，特别是涉及一种煤炭地下气化移动式点火系统。The invention relates to the related field of underground coal gasification technology, in particular to a mobile ignition system for underground coal gasification.
背景技术 Background technique
煤炭作为当今乃至今后几十年的主要能源，其高效综合开采利用关系国计民生。特别是在节能减排的新形势下，洁净煤技术应用已被各国提上日程。煤炭地下气化是通过将气化剂导入地下煤层，使煤炭进行有控制的燃烧，并将产生的可燃气体导出地面再加以综合利用的一种高效开采方式。煤炭地下气化技术能够大幅度有效减少CO2排放，降低地面污染，特别是对于深层煤炭，还能避免钻井方面的困难。Coal is the main energy source today and even in the next few decades, and its efficient and comprehensive mining and utilization are related to the national economy and the people's livelihood. Especially in the new situation of energy saving and emission reduction, the application of clean coal technology has been put on the agenda of various countries. Underground coal gasification is a high-efficiency mining method that introduces gasification agents into underground coal seams to allow coal to be burned in a controlled manner, and the combustible gases produced are exported to the ground for comprehensive utilization. Underground coal gasification technology can significantly and effectively reduce CO 2 emissions, reduce surface pollution, especially for deep coal, and avoid difficulties in drilling wells.
煤炭地下气化的第一步是煤层的点燃。点燃后的煤层在控制条件下燃烧即能实现可燃气体如H2、CO和CH4等的稳定生产。然而，现有的焦炭点火、电点火和化学点火等技术都各自存在相应不足，适应性弱，往往因地质条件不好或操作不当等原因导致点火失败，或存在爆炸风险，增加了点火困难和运行成本。再者，目前的点火技术通常采用固定式装置，应用时每隔一定距离设置一个点火器来形成一个地下气化炉，一方面是钻井数量较多，另一方面是若气化过程中遭遇苛刻条件意外熄火时无法迅速及时重新点燃。另外，现有的固定式点火装置不能实现连续性操作，点火效率低，操作过程不稳定，特别是，传统的点火装置中燃气通道和供氧通道位于同一侧，若管道意外破损易导致爆炸危险，安全性存在一定问题。因此，为解决上述困难，有必要开发一种适应性和可靠性更强，更为安全的点火系统。The first step in underground coal gasification is the ignition of the coal seam. Combustion of the ignited coal seam under controlled conditions can realize the stable production of combustible gases such as H 2 , CO and CH 4 . However, the existing technologies such as coke ignition, electric ignition and chemical ignition all have corresponding deficiencies and are weak in adaptability, often resulting in ignition failure due to poor geological conditions or improper operation, or there is a risk of explosion, which increases the difficulty of ignition and Operating costs. Furthermore, the current ignition technology usually uses a fixed device, and an igniter is set at a certain distance during application to form an underground gasifier. On the one hand, there are a large number of drilling wells; Conditions cannot be re-ignited quickly and in a timely manner in the event of an accidental flameout. In addition, the existing fixed ignition device cannot achieve continuous operation, the ignition efficiency is low, and the operation process is unstable. In particular, the gas channel and the oxygen supply channel are located on the same side in the traditional ignition device. If the pipeline is accidentally damaged, it will easily lead to explosion hazards. , there are some security issues. Therefore, in order to solve the above-mentioned difficulties, it is necessary to develop an ignition system with stronger adaptability, reliability and safety.
发明内容 Contents of the invention
(一)要解决的技术问题(1) Technical problems to be solved
本发明要解决的技术问题是提供一种点火系统，以克服现有点火技术不能实现连续性操作、点火效率低、操作过程不稳定及安全性低的问题。The technical problem to be solved by the present invention is to provide an ignition system to overcome the problems that the existing ignition technology cannot realize continuous operation, low ignition efficiency, unstable operation process and low safety.
(二)技术方案(2) Technical solutions
为了解决上述技术问题，本发明提供一种煤炭地下气化移动式点火系统，其包括设置在煤炭地下可移动的点火装置；与所述点火装置通过燃气管道相连的地面燃气供给系统，通过所述燃气管道从地面向点火装置供给点火用燃气；穿过煤层连通煤炭地下与地上的进气管，通过进气管从地上向煤炭地下提供点火用空气或氧气。In order to solve the above technical problems, the present invention provides a mobile ignition system for underground coal gasification, which includes a movable ignition device installed underground in coal; a ground gas supply system connected to the ignition device through a gas pipeline, through which The gas pipeline supplies ignition gas from the ground to the ignition device; through the coal seam, it connects the coal underground and the air intake pipe on the ground, and provides ignition air or oxygen from the ground to the coal underground through the air intake pipe.
其中，所述煤炭地下设置有移动装置，所述点火装置设置在所述移动装置上，由所述移动装置带动所述点火装置移动。Wherein, the coal underground is provided with a moving device, the ignition device is arranged on the moving device, and the moving device drives the ignition device to move.
其中，所述移动装置上设置有驱动装置和移动滚轮，所述驱动装置与地面控制系统相连，由所述地面控制系统控制所述驱动装置工作。Wherein, the moving device is provided with a driving device and moving rollers, the driving device is connected with a ground control system, and the driving device is controlled by the ground control system to work.
其中，所述地面控制系统与所述点火装置相连，以控制所述点火装置的开、关或点火大小。Wherein, the ground control system is connected with the ignition device to control on, off or ignition of the ignition device.
其中，所述地面控制系统与所述驱动装置和点火装置均通过数据通道相连，所述数据通道内置于所述燃气管道。Wherein, the ground control system is connected with the driving device and the ignition device through a data channel, and the data channel is built in the gas pipeline.
其中，所述燃气管道和进气管分别位于所述点火装置的相对两侧。Wherein, the gas pipeline and the intake pipe are respectively located on opposite sides of the ignition device.
其中，所述进气管和燃气管道均采用耐高温抗氧化耐压不锈钢软管，该软管所承受温度不低于1000℃。Wherein, the air intake pipe and the gas pipe are all made of high-temperature, oxidation-resistant and pressure-resistant stainless steel hoses, and the temperature of the hoses is not lower than 1000°C.
其中，所述驱动装置和移动滚轮采用耐高温耐压抗氧化钢材制成，该钢材所承受温度不低于1000℃。Wherein, the driving device and the moving rollers are made of high-temperature-resistant, pressure-resistant and anti-oxidation steel, and the temperature of the steel is not lower than 1000°C.
(三)有益效果(3) Beneficial effects
上述技术方案所提供的煤炭地下气化移动式点火系统，可以克服气化过程中突然熄火时传统点火器不能迅速进行二次点火的缺陷，它可以根据气化过程的点火需求任意移动，保证点火过程的连续性和时效性，省时省力；移动式点火系统可扩大气化炉规模，减少钻井数量，降低生产成本，提高生产进度，特别是对于深层和超深层煤炭的地下气化，能够显著降低运行费用；单燃气管道设计使得点火过程更安全，减少爆炸危险；操作简单，适应性强，点火成功率高。The underground coal gasification mobile ignition system provided by the above technical solution can overcome the defect that the traditional igniter cannot quickly perform secondary ignition when the gasification process is suddenly turned off. It can move arbitrarily according to the ignition requirements of the gasification process to ensure ignition The continuity and timeliness of the process save time and effort; the mobile ignition system can expand the scale of the gasifier, reduce the number of drilling wells, reduce production costs, and improve production progress, especially for underground gasification of deep and ultra-deep coal. Reduce operating costs; the single gas pipeline design makes the ignition process safer and reduces the risk of explosion; the operation is simple, the adaptability is strong, and the ignition success rate is high.
附图说明 Description of drawings
图1是本发明实施例的煤炭地下气化移动式点火系统的结构示意图。Fig. 1 is a schematic structural diagram of a mobile ignition system for underground coal gasification according to an embodiment of the present invention.
其中，1：点火装置，2：燃气出口，3：燃气管道，4：驱动装置，5：移动滚轮，6：数据通道，7：地面控制系统，8：排气管，9：进气管，10：煤层。Among them, 1: ignition device, 2: gas outlet, 3: gas pipeline, 4: driving device, 5: moving roller, 6: data channel, 7: ground control system, 8: exhaust pipe, 9: intake pipe, 10 : coal seam.
具体实施方式 Detailed ways
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
图1示出了本实施例的煤炭地下气化移动式点火系统的结构示意图，参照图示，其包括设置在煤炭地下可移动的点火装置1，与所述点火装置1通过燃气管道3相连的地面燃气供给系统(图中未示出)，通过所述燃气管道3从地面向点火装置1供给点火用燃气；穿过煤层10连通煤炭地下与地上的进气管9，通过进气管9从地上向煤炭地下提供点火用空气或氧气，燃气管道3和进气管9分别位于所述点火装置1的相对两侧，安全性好，可避免气路意外破损时助燃气体和可燃气体在点火前发生爆炸的危险。Fig. 1 shows the structural schematic diagram of the underground coal gasification mobile ignition system of the present embodiment, referring to the diagram, it includes a movable ignition device 1 arranged underground in coal, connected to the ignition device 1 through a gas pipeline 3 The ground gas supply system (not shown in the figure), supplies the ignition gas from the ground to the ignition device 1 through the gas pipeline 3; passes through the coal seam 10 to connect the coal underground and the air intake pipe 9 on the ground, and passes through the air intake pipe 9 from the ground to the ground. The coal underground provides air or oxygen for ignition, and the gas pipeline 3 and the intake pipe 9 are respectively located on opposite sides of the ignition device 1, which has good safety and can avoid the explosion of combustion-supporting gas and combustible gas before ignition when the gas circuit is accidentally damaged Danger.
点火装置1的可移动通过在煤炭地下设置移动装置，将所述点火装置1设置在所述移动装置上，由所述移动装置带动所述点火装置1移动。具体地，如图1所示，移动装置上设置有驱动装置4和移动滚轮5，所述驱动装置4与地面控制系统7相连，由所述地面控制系统7控制所述驱动装置4工作。地面控制系统7还与点火装置1相连，由地面控制系统7控制所述点火装置1的开、关或点火大小。地面控制系统7与所述驱动装置4和点火装置1均通过数据通道6相连，进而实现地面控制系统7对点火操作和位置移动的远程控制，所述数据通道6内置于所述燃气管道3，以便利用燃气管道3内通过的冷燃气对其进行冷却，保证数据顺畅传输，点火装置能够稳定可靠运行。The ignition device 1 can be moved by setting a moving device underground in the coal, setting the ignition device 1 on the moving device, and driving the ignition device 1 to move by the moving device. Specifically, as shown in FIG. 1 , the mobile device is provided with a driving device 4 and a moving roller 5 , the driving device 4 is connected to a ground control system 7 , and the ground control system 7 controls the operation of the driving device 4 . The ground control system 7 is also connected with the ignition device 1 , and the ground control system 7 controls the on, off or ignition level of the ignition device 1 . The ground control system 7 is connected to the driving device 4 and the ignition device 1 through a data channel 6, thereby realizing the remote control of the ignition operation and position movement by the ground control system 7. The data channel 6 is built in the gas pipeline 3, In order to use the cold gas passing through the gas pipeline 3 to cool it, ensure smooth transmission of data, and stable and reliable operation of the ignition device.
本实施例中，与进气管9同侧，还设置有穿过煤层10连通煤炭地下与地上的排气管8，由进气管9向煤炭地下通入助燃气体空气或氧气，由排气管8将煤炭气化产生的产品气体排出。进气管9、排气管8和燃气管道3均采用耐高温抗氧化耐压不锈钢软管，该软管所承受温度不低于1000℃，以适应煤层10点火成功后的高温环境；驱动装置4和移动滚轮5采用耐高温耐压抗氧化钢材制成，该钢材所承受温度不低于1000℃。In the present embodiment, on the same side as the intake pipe 9, an exhaust pipe 8 passing through the coal seam 10 to communicate with the coal underground and the ground is also provided. The product gas produced by coal gasification is discharged. The intake pipe 9, exhaust pipe 8 and gas pipe 3 are all made of high-temperature, oxidation-resistant and pressure-resistant stainless steel hoses. and the moving roller 5 are made of high-temperature-resistant, pressure-resistant and anti-oxidation steel, and the temperature of the steel is not lower than 1000°C.
使用本实施例的点火系统进行点火时，首先将助燃气进气管9和排气管8放入煤层10的特定位置并保证其畅通，将点火装置1通过另一钻孔放置于靠近煤层10和进气管9的位置，然后进气管9开始通入富氧气体，燃气管道3通入燃气甲烷、乙烷、丙烷(C1-C6)或硅烷等，打开地面控制系统7的点火开关，燃气开始燃烧，同时周围煤层的温度开始上升；点火后开始对排气管8排出的气体进行间隔取样分析；随着煤层温度逐渐升高，排出的气体中可燃组分的比例不断增加，当出口气体中的可燃成分(H2+CO+CH4)含量超过20％时，认为点火成功。随着气化过程的进行，煤炭地下气化所形成的气化炉不断向前移动，若在此过程中煤层地质环境突遇变化或其他原因导致煤层熄灭，气化过程中断，此时通过地面控制系统7使点火装置1移动至恰当位置，重新通入燃气，重复点火和取样分析过程，直至煤层二次点火成功。When using the ignition system of this embodiment to ignite, first put the assisted gas intake pipe 9 and the exhaust pipe 8 into the specific position of the coal seam 10 and ensure that it is unimpeded, and the ignition device 1 is placed near the coal seam 10 and the coal seam 10 through another borehole. The position of the air intake pipe 9, then the air intake pipe 9 begins to feed oxygen-enriched gas, and the gas pipeline 3 feeds gas methane, ethane, propane (C1-C6) or silane, etc., turns on the ignition switch of the ground control system 7, and the gas starts to burn At the same time, the temperature of the surrounding coal seam begins to rise; after ignition, the gas discharged from the exhaust pipe 8 is started to be sampled and analyzed at intervals; as the temperature of the coal seam gradually increases, the proportion of combustible components in the discharged gas continues to increase. When the content of combustible components (H 2 +CO+CH 4 ) exceeds 20%, it is considered that the ignition is successful. As the gasification process progresses, the gasifier formed by underground coal gasification continues to move forward. If the geological environment of the coal seam suddenly changes or other reasons cause the coal seam to go out during the process, the gasification process is interrupted. The control system 7 moves the ignition device 1 to an appropriate position, re-introduces gas, and repeats the process of ignition and sampling analysis until the second ignition of the coal seam is successful.
本实施例的点火系统不仅可以沿着气化炉的推进不断向前移动，系统的移动性可以有效避免气化过程中熄火时的重新钻井问题，而且单燃气管道设计使得点火过程更为安全可靠，能够克服传统点火系统在气化过程突遇熄火时不能迅速及时进行二次点火的缺点，能够任意移动位置对点火过程进行有效补救；该系统具有适应性强，操作简单，安全可靠等优点，对有井式或无井式、浅层或深层煤炭地下气化点火过程均适用。The ignition system of this embodiment can not only move forward continuously along the advancement of the gasifier, the mobility of the system can effectively avoid the problem of re-drilling when the gas is turned off during the gasification process, and the single gas pipeline design makes the ignition process safer and more reliable , can overcome the shortcomings of the traditional ignition system that cannot quickly and timely re-ignite when the gasification process suddenly stalls, and can move the position arbitrarily to effectively remedy the ignition process; the system has the advantages of strong adaptability, simple operation, safety and reliability, etc. It is applicable to the ignition process of underground coal gasification with well or without well, shallow layer or deep layer.
由以上实施例可以看出，本发明通过设置可移动的点火装置，可以克服气化过程中突然熄火时传统点火器不能迅速进行二次点火的缺陷，它可以根据气化过程的点火需求任意移动，保证点火过程的连续性和时效性，省时省力；移动式点火系统可扩大气化炉规模，减少钻井数量，降低生产成本，提高生产进度，特别是对于深层和超深层煤炭的地下气化，能够显著降低运行费用；单燃气管道设计使得点火过程更安全，减少爆炸危险；操作简单，适应性强，点火成功率高。It can be seen from the above embodiments that the present invention can overcome the defect that the traditional igniter cannot quickly perform secondary ignition when the gasification process is suddenly turned off by providing a movable ignition device, and it can be moved arbitrarily according to the ignition requirements of the gasification process , to ensure the continuity and timeliness of the ignition process, saving time and effort; the mobile ignition system can expand the scale of the gasifier, reduce the number of drilling wells, reduce production costs, and improve production progress, especially for underground gasification of deep and ultra-deep coal , can significantly reduce operating costs; the single gas pipeline design makes the ignition process safer and reduces the risk of explosion; the operation is simple, the adaptability is strong, and the ignition success rate is high.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and replacements can also be made, these improvements and replacements It should also be regarded as the protection scope of the present invention.
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| 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 | A combined enhanced drainage method of hydraulic slits in boreholes and gas explosion fracturing coal bodies |
| CN104594873B (en) * | 2014-12-08 | 2019-02-05 | 新奥科技发展有限公司 | Coal underground gasifier and gasification method |
| AU2016279806A1 (en) * | 2015-06-15 | 2017-11-16 | Halliburton Energy Services, Inc. | Igniting underground energy sources |
| WO2018035734A1 (en) * | 2016-08-24 | 2018-03-01 | 中为(上海)能源技术有限公司 | 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 | Skid-mounted gas fuel ignition device and ignition method thereof |
| 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 | A mobile ignition system, device and method for underground coal gasification |
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