CN104453830A - Water control system and method for coal underground gasifier - Google Patents

Water control system and method for coal underground gasifier Download PDF

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Publication number
CN104453830A
CN104453830A CN 201410624098 CN201410624098A CN104453830A CN 104453830 A CN104453830 A CN 104453830A CN 201410624098 CN201410624098 CN 201410624098 CN 201410624098 A CN201410624098 A CN 201410624098A CN 104453830 A CN104453830 A CN 104453830A
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coal
water
drainage
gasifier
underground
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CN 201410624098
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Chinese (zh)
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杨彬
翁新龙
马晓霞
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新奥气化采煤有限公司
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/295Gasification of minerals, e.g. for producing mixtures of combustible gases
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C43/00Methods for preparing for the gasification of coal underground

Abstract

The invention provides a water control system and method for a coal underground gasifier. The water control system for the coal underground gasifier comprises a plurality of drainage channels communicated with one another and at least one vertical drainage well. The drainage channels are communicated with the vertical drainage wells. The drainage channels are arranged on the periphery and at the bottom of the coal underground gasifier. The coal underground gasifier is provided with a gasification channel. The drainage channels are communicated with the gasification channel of the coal underground gasifier through coal bed cracks. The water control method includes the step that water in the gasification channel is guided into the drainage channels through the coal bed cracks. The water control system and method for the coal underground gasifier can effectively control the water amount of a gasification coal bed, the gasification reaction is facilitated, gas and water crossing is avoided, and the drainage channels are prevented from being blocked.

Description

煤炭地下气化炉控水系统及控水方法 Underground coal gasification water system and the control method of controlling water

技术领域 FIELD

[0001] 本发明涉及煤炭地下气化领域,更具体地,涉及一种煤炭地下气化炉控水系统及控水方法。 [0001] The present invention relates to the field of underground coal gasification, and more particularly, to an underground coal gasification water system and control method for controlling the water.

背景技术 Background technique

[0002] 煤炭地下气化是在原始煤层中通过钻孔进行气化的过程。 [0002] The gasification of underground coal gasification process is carried out by drilling a hole in the original coal seam. 在煤层气化过程中,如果煤层含水量较小可以增进气化反应,但会提高煤层点火难度,如果煤层含水量较大则会导致气化炉阻力上升,因此,控水是煤层气化工艺的关键环节。 In the process of coal bed methane, coal seam if the water content is small can improve the gasification reaction, but will increase the difficulty of the ignition seam, if the seam larger water content can lead to increased resistance to the gasifier, and therefore, the control process water CBM the key point.

[0003]目前煤炭地下气化炉的钻孔主要有垂直孔和定向孔两种,当钻孔在含水煤层施工后,原始煤层遭到破坏,钻孔在煤层中的部分就形成了汇水通道,尤其是定向孔水平段在煤层中的距离较长,周边煤层水都会涌向定向孔,在水量达到一定程度的时候就会导致气化炉阻力上升。 [0003] At present, there are two kinds of vertically oriented bore holes and underground coal gasification drilling, when the drilling aqueous seam construction, destruction of the original seam, the seam portion of the borehole to form a catchment channel , especially long distance, the peripheral seam flock to the water-oriented bore hole oriented in the horizontal section of the seam, the amount of water reaches a certain level when the gasifier will lead to increased resistance. 现有技术是通过提高气化炉压力来控制煤层水向通道中汇集,但气化炉压力大小决定于地面压力提供设备,当煤层水的压力大于气化炉提供的压力时该方法就可能失效,而且采用气化炉提压控水的方法成本较高,另外,煤层顶底板承压能力有限时气化炉压力过高会导致地层损坏,影响整个煤炭气化系统。 The prior art is controlled by increasing the pressure of the gasifier together to seam the water passage, but the size of the gasifier pressure determined on the ground to provide a pressure device, which may fail when the pressure is greater than water pressure in the coal seam gasification furnace provided and the high cost of the gasifier using the method mentioned voltage controlled water addition, the limited bearing capacity of coal seam gasifier pressure is too high can lead to formation damage, affecting the entire coal gasification system.

[0004] 为解决气化炉提压控水方法的局限性,行业内又提出了新的地下气化炉排水系统的方法,如专利号为200810119351.9的一种新型煤炭地下气化炉系统,如图1所示,该发明中的炉型包括设置在煤层1中的气化通道10,深入到煤层底板2以下的排水通道8,多个从地表伸入煤层1的气化垂直钻孔5、6、9,多个从地表伸入煤层1的竖直排水井4,以及多个从地表伸入煤层底板2的竖直排水井3、7,所述气化垂直钻孔5、6、9和竖直排水井4与气化通道10连通,所述竖直排水井3、7和排水通道8连通,气化通道10位于排水通道8的上方且由垂直孔相互连通。 [0004] In order to solve the limitations of the voltage controlled lifting gasifier process water, the industry has proposed a new method for the underground gasification drainage system, such as a new patent No. 200810119351.9 underground coal gasification system, such as As shown in FIG. 1, in this invention includes a furnace 1 in the gasification channel seam 10, seam floor 2 or less deep into the drain passage 8, a plurality of vertical bore 5 extending into the gasifier 1 from the surface seam, 6,9, a plurality of drainage wells from a vertical surface extending into the seam 4 1, and a plurality of vertical floor from the surface drainage wells extending into the seam 2 of 3,7, 5,6,9 vertical boreholes the gasification 4 vertical drainage wells and the communication passage 10 and the gasifier, and the vertical drainage wells 3,7 drainage passage 8, the channel 10 is located above the gasification drain passage 8 and are communicated with each other by a vertical hole. 煤层涌水可以通过上述通道直接汇集到排水通道8中,然后后由深井泵将水排出。 Coal can be pooled gushing through said passage 8 directly into the drain passage and the drain water from the deep well.

[0005] 但是,上述排水系统由于煤炭地下气化炉的气化通道与排水通道是由垂直孔相互连通,气化过程中的灰渣焦油等燃烧产物会顺着此通道可以进入排水通道,堵塞排水通道;气化炉内的气体也有可能进入排水通道,导致水泵效率下降或不出水,甚至形成气蚀损坏水泵;而当排水通道中的水量过大时,也可能导致水进入气化通道,形成水封,不利于气化。 [0005] However, since the above-mentioned drainage of underground gasification of coal gasification channel and the drain passage are communicated with each other by a vertical hole, the gasification ash during combustion products such as tar can enter this channel will follow the drain passage, clogging drain passage; a gas in the gasification furnace is also possible to enter the drain channel, pump efficiency leading to decreased or no water, and even the formation of cavitation damage to the pump; and the drain passage when the excessive water, the water may also lead to passage into the gasifier, forming a water seal, is not conducive to gasification.

发明内容 SUMMARY

[0006] 本发明所要解决的技术问题是提供一种排水通道和气化通道相对独立的煤炭气化炉控水系统及控水方法, [0006] The present invention solves the technical problem is to provide a drain passage and the gasification of coal gasification channel relatively independent water control system and a control method of water,

[0007] 为实现上述发明目的,本发明提供一种煤炭地下气化炉控水系统,包括多个相互连通的排水通道和至少一个竖直排水井,排水通道和竖直排水井相连通,排水通道设置在煤炭地下气化炉的周边和底部,煤炭地下气化炉具有气化通道,排水通道通过煤层裂隙和煤炭地下气化炉的气化通道连通。 [0007] In order to achieve the above object, the present invention provides an underground coal gasification water control system comprising a plurality of interconnected drain passage and at least one vertical drainage wells, and a drain passage communicating the vertical drainage wells, the drainage and a bottom channel disposed at the periphery of underground coal gasification, gasification of underground coal gasification furnace having a passage communicating through the drain passage and underground coal gasification bed fracture gasification channel.

[0008] 优选的,位于所述气化炉周边和底部的排水通道的长度大于气化炉相应方向的长度。 [0008] Preferably, the length of the gasifier is located outside the bottom of the drain passage and the corresponding direction is larger than the length of the gasifier.

[0009] 优选的,位于所述气化炉周边的排水通道到气化区域边界的距离大于5米,并且与最底部的气化通道持平或略低。 [0009] Preferably, the drain passage is located outside of the gasification furnace to the gasification zone boundary distance greater than 5 meters, and the bottom-most flat or slightly lower vaporization channel.

[0010] 优选的,所述气化炉底部的排水通道在煤层的气化通道以下的位置。 [0010] Preferably, the position of the drain passage at the bottom of the channel in the gasification of coal gasifier or less.

[0011] 优选的,所述相互连通的排水通道包括设置在气化炉周边的竖直段、造斜段、水平段和气化炉底部的水平段。 [0011] Preferably, the interconnected drain passage disposed around a gasification furnace comprises a vertical section, curve section, the horizontal section and a bottom horizontal section of the gasifier.

[0012] 优选的,所述位于气化炉底部排水通道的水平段朝竖直排水井倾斜。 [0012] Preferably, the drain channel is located at the bottom of the gasifier the horizontal section is inclined towards the vertical drainage well.

[0013] 优选的,所述竖直排水井一端位于煤层底板以下,另一端贯穿煤层和覆盖层与地表相连通,位于煤层及煤层底板的竖直排水井部分设置有滤水管,竖直排水井的其余部分设置钢套管。 [0013] Preferably, the vertical drainage wells located at one end the seam floor, the other end of the through seams and communicating with the surface coating layer, and the seam is located in the bottom seam portion is provided with vertical drainage well filter pipe, a vertical drainage wells the remainder of the steel casing is provided.

[0014] 优选的,所述竖直排水井内有排水装置。 [0014] Preferably, the vertical drainage means drainage well.

[0015] 为实现上述发明目的,本发明还提供一种煤炭地下气化炉的控水方法,包括: [0015] In order to achieve the above object, the present invention further provides an underground coal gasifier water control method, comprising:

[0016] 在气化炉的周边和底部设置多个相互连通的排水通道,使煤层中进入气化通道中的水通过煤层裂隙流入排水通道; [0016] In the periphery and bottom of the gasifier is provided a plurality of drainage channels communicate with each other, into the gasifier in a coal seam water flows into the drain passage by passage coal seam fracture;

[0017] 设置竖直排水井,使所述排水通道的水流入竖直排水井并通过排水装置排出。 [0017] drainage wells disposed vertically, so that the water flows into the drain passage and the vertical drainage wells drained through the drain means.

[0018] 优选的,将所述气化炉周边的排水通道设置在距离气化区域边界5米以上,所述气化炉底部的排水通道在煤层的气化通道以下的位置。 [0018] Preferably, the periphery of the gasifier is provided in the drain passage from the gasification zone boundary of more than 5 meters, the position of the drain passage at the bottom of the channel in the gasification of the coal gasification furnace or less.

[0019] 本发明的有益效果在于:由于本发明煤炭地下气化炉型的气化通道与排水道通相对独立,所以气水互串的可能性大大降低,避免了排水通道气阻,气化通道水封的现象发生。 [0019] Advantageous effects of the present invention is that: since the underground gasification of coal gasification type of the present invention, the drain passage through independent channels, each string so that the possibility of gas and water is greatly reduced, to avoid the air resistance drain passage, the gasification channel seal phenomenon occurs. 同时,由于水是由煤层裂隙流入排水通道中的,所以水中携带的灰渣焦油等燃烧产物或者大颗粒的物体就被阻塞在外面,不会进入排水通道进而影响系统排水,在气化炉的周边形成降水漏斗,防止气化炉以外的煤层水进入目标煤区。 Meanwhile, since the water is flowing into the drain passage, so that the water carried by the ash Coal tar the fracture combustion products or objects of large particles was blocked out, thereby affecting the drainage channels does not enter the drainage system, the gasifier precipitation formed around the funnel to prevent water outside seam coal gasifier into the target zone.

附图说明 BRIEF DESCRIPTION

[0020] 附图是用来提供对本发明的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本发明,但并不构成对本发明的限制。 [0020] The drawings are provided for further understanding of the invention and constitute a part of this specification, the following detailed description serve to explain the embodiments of the present invention, but not limit the present invention. 在附图中: In the drawings:

[0021] 图1是现有技术地下气化炉控水系统的剖面示意图; [0021] FIG. 1 is a cross-sectional view of the prior art underground water system controls the gasifier;

[0022] 图2是本发明煤炭气化炉控水系统的立体结构示意图; [0022] FIG. 2 is a schematic perspective aqueous coal gasification furnace system according to the present invention is controlled;

[0023] 图3是本发明煤炭气化炉控水系统的剖面示意图; [0023] FIG. 3 is a sectional schematic view of the water system of the present invention controls coal gasification furnace;

[0024] 图4是本发明煤炭气化炉控水系统的一种具体实施方式的俯视示意图; [0024] FIG. 4 is a coal gasification furnace according to the present invention, a specific embodiment of control system schematic top view of the water;

[0025] 图5是本发明煤炭气化炉控水系统的另一种具体实施方式的俯视示意图; [0025] FIG. 5 is a coal gasification furnace according to the present invention, another specific embodiment of the control system schematic top view of the water;

[0026] 附图标记说明 [0026] REFERENCE NUMERALS

[0027] 1復盖层2煤层3煤层底板 [0027] The covering layer 1 2 3 Seam coal floor

[0028] 10竖直方向的气化通道20水平方向的气化通道 Gasification Gasification passage channel [0028] 10 vertical 20 horizontal

[0029] 30排水通道40竖直排水井 [0029] The drain passage 30 vertical drainage wells 40

具体实施方式 detailed description

[0030] 以下结合附图对本发明的具体实施方式进行详细说明。 [0030] The following specific embodiments of the present invention will be described in detail in conjunction with the accompanying drawings. 应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。 It should be understood that the specific embodiments described herein are only to illustrate and explain the present invention and are not intended to limit the present invention.

[0031] 在本发明中,在未作相反说明的情况下,使用的方位词如“上、下、左、右”通常是指说明书附图中所示的方向。 [0031] In the present invention, as is not the case to the contrary, the use of the word orientation such as "upper, lower, left and right" generally refers to the direction shown in the accompanying drawings.

[0032] 请参考图2和图3,从上而下分别是覆盖层1、煤层2、煤层底板3,覆盖层1之上为地表。 [0032] Please refer to FIGS. 2 and 3, respectively, from the top down a cover layer, seam 2, 3 seam floor, the covering layer 1 is on the surface. 煤炭地下气化炉设置在该目标气化煤层区域内,包括一系列竖直方向的气化通道10和水平方向的气化通道20,所述竖直方向气化通道10和水平方向气化通道20位于目标气化煤层。 Disposed underground coal gasification zone in the gasification target coal seam 20, the vertical and horizontal direction gasification passage 10 comprises a series of vertical channels gasification gasification channels 10 and horizontal channels vaporized direction 20 located in the target coal seam gasification. 多个竖直方向的气化通道10贯穿覆盖层1,一端与地表的外部气化设备连接,另一端设置在需要气化的煤层2中,所述水平方向的气化通道20用于连接多个竖直方向的气化通道10。 A plurality of vertical channels gasifier 10 through the cover layer 1, the external gasification equipment, and the other end is provided with an end surface in the required gasification of the coal seam 2, gasification passage 20 in the horizontal direction for connecting a plurality gasification a channel 10 in the vertical direction.

[0033] 在所述煤炭地下气化炉的周边和底部布置控水系统。 [0033] The water control system disposed at the periphery of the bottom and underground coal gasification furnace. 该控水系统包括多个相互连通的排水通道30和至少一个竖直排水井40,所述相互连通的排水通道包括设置在气化炉周边的竖直段、造斜段、水平段和气化炉底部的水平段,竖直排水井40的位置通常选择在目标气化煤层的最低点,竖直排水井40需要贯穿覆盖层1和煤层2,其一端与地表相连通,另一端设置在煤层底板3以下一定深度的位置,形成汇水区域,该竖直排水井40位于煤层2和煤层底板3的部分设置滤水管,位于覆盖层1的部分设置钢套管。 The water control system comprises a plurality of mutually communicating the drain channel 30 and at least one vertical drainage wells 40, the drain passage communicating with each other in the gasification furnace comprises a peripheral vertical section, curve section, the horizontal section of the gasifier, and the bottom of the horizontal section, the vertical position of the drainage well 40 at the lowest point is typically selected target coal gasification, it requires vertical drainage wells 40 through layer 1 and the cover 2 seam having one end in communication with the surface, provided at the other end seam floor 3 the position of a predetermined depth is formed catchment area, drainage wells 40 located in the vertical seam and the seam floor 2 filter tube portion 3 is provided, located on the cover layer portion is provided in a steel casing. 排水通道30为定向钻孔,其位于目标气化煤层的外围和底部,形成一个排水网络将气化煤层包裹在其中,所述排水通道30在煤层各个方向上的长度是根据气化炉区域的长度确定的,保证在煤层各个方向的长度都要大于气化炉相应方向的长度,优选气化区四周的排水通道到气化区域边界的距离大于5米,并且与最底部的气化通道持平或略低,底部的排水通道在煤层的气化通道以下的位置。 Directional drilling is a drain channel 30, which is located at the periphery and bottom of the target coal gasification, gasification to form a wrapped drainage network in seam wherein the drain passage 30 in the longitudinal direction of the respective seam region is a gasifier determined length, the length in each direction to ensure that the seam to be greater than the corresponding directions of the gasifier, the gasification zone is preferably around drain passage to the gasification zone boundary distance greater than 5 meters, and the bottommost flat gasification channel or lower, the position of the drain passage at the bottom of the channel in the gasification of coal or less.

[0034] 通常排水通道30的水平方向段设置为与煤层底板界面3平行,但如果煤层2是近水平煤层,则要求水平段朝竖直排水井40方向倾斜,使水在重力作用下自动汇入竖直排水井40。 [0034] The drainage channel generally horizontal section 30 is disposed parallel to the bottom seam interface 3, but if the seam is nearly horizontal seam 2, the required level of the inclined section 40 toward the direction vertical drainage wells, automatic water sinks under gravity 40 into vertical drainage well. 所述竖直排水井40的数量是根据煤层含水量的大小设置,可以是一个也可以是多个,每个竖直排水井40与一条或多条排水通道30相连通,用于将排水通道30里的水汇集在一起后排出。 The number of vertical drainage wells 40 are sized in accordance with the water content of the coal seam may be one or a plurality of each of the vertical drainage wells 40 and one or more drain channel 30 communicates, for drainage channel after discharging the water 30 pooled.

[0035] 请参考图4和图5,这是本发明的两种具体实施例的炉型布置图,当然,本发明气化炉控水系统包括但不限于这两种炉型,所有炉型的布置原则都是使气化通道和排水通道通过煤层相互隔离,并保持一定距离,通过煤层裂隙导水。 [0035] Please refer to FIG. 4 and FIG. 5, which is disposed furnace views of two embodiments of the present invention, specific embodiments, of course, water control system the gasifier of the present invention include, but are not limited to these two furnaces, furnace all the principles are the gasification channel arrangement and separated from each other by a seam drain passage, and maintain a certain distance, through the water seam fracture conductivity. 如图所示,虚线范围内为气化区,排水通道布置在气化区的外围或底部,四周的排水通道距气化区一定距离,底部的排水通道要在气化炉最底端以下一定距离。 As shown, the dashed line to the gasification zone, the drain passage is arranged at a distance from the periphery or bottom of the gasification zone, the gasification zone around the drain passage, the drain passage at the bottom of the bottom of the gasifier must be less distance.

[0036] 在本发明煤炭气化炉型构建好以后就可以进入气化炉点火运行。 [0036] In the gasification furnace of the present invention is constructed after a good ignition can enter the gasifier operation. 由于气化通道10,20与排水通道30没有直接相连,而是相隔一定距离的煤层,主要是通过煤层裂隙导水。 Since gasifier 30 not directly connected to the drain passage channels 10, 20, but is spaced a distance from the seam, seam guide fissure mainly through water. 在点火时需要通入一定压力的气化剂,将煤层水压入排水通道30中,而且因为排水通道30的水平方向段的标高要低于气化通道20,利用水的重力更容易让煤层水流向排水通道30,在排水通道30的周围形成汇水区。 Requires a certain pressure into the gasifying agent at the time of ignition, the seam is forced into the drain passage 30, since the elevation and the horizontal section of the drain channel 30 is lower than the gasification channel 20, with water easier for gravity seam the water drain channel 30 is formed in the catchment area around the drain passage 30. 随着气化炉运行时间增加,在汇水通道周边能形成排水漏斗,从而将气化区内的煤层水排净。 With increasing running time of the gasifier, at the periphery of the catchment channel drainage funnel can be formed, so that the seam area vaporized water drain.

[0037] 此外,排水通道30将目标煤炭气化区域与周围煤层隔开,周围煤层的渗水也会通过排水通道30流入竖直排水井40,从而防止周围煤层的水涌向目标煤炭气化区。 [0037] In addition, the drain channel 30 and the area surrounding the target coal gasification spaced seam, seam seepage around the vertical drainage wells 40 also flows through the drain passage 30, thereby preventing the water surrounding the coal gasification zone target flock .

[0038] 本发明煤炭气化炉控水系统的竖直排水井40内设有排水装置,常用的排水装置可以是水泵,通过排水装置将竖直排水井40中的水排出。 [0038] 40 vertical drainage wells equipped coal gasification furnace of the present invention have controlled water drainage system, the drainage means may be a conventional pump, by the vertical drainage means drainage well water 40 is discharged. 排水量是根据煤层含水量来确定的。 The displacement is determined moisture content of the coal seam.

[0039] 由于本发明煤炭气化炉的气化通道与排水道通相对独立,所以气水互串的可能性大大降低,避免了排水通道气阻,气化通道水封的现象发生。 [0039] Since the coal gasification furnace which minimize the present invention through the gasification channel and the drain channel independent, so that each string of air and water, to avoid the air resistance drainage channel, the channel seal gasification phenomenon. 同时,由于水是由煤层裂隙流入排水通道30中的,所以水中携带的灰渣焦油等燃烧产物或者大颗粒的物体就被阻塞在外面,不会进入排水通道30进而影响排水。 Meanwhile, since the water is flowing into the drain passage 30, so that the water carried by the ash Coal tar and other combustion products or cracks larger particles outside the object to be blocked, does not enter the drain channel 30 thereby affecting drainage. 并且由于排水通道足够长,滤水面积足够,随着气化炉运行煤层中裂隙越来越发育,导水效果会逐渐增强,排水系统的排水效果也会逐渐增强。 Since the drain passage and long enough, sufficient drainage area, operation of the gasifier with coal seam fracture more developed, the water guiding effect will gradually increase, the effect of the drainage system of drainage will gradually increase. 而且,因为在气化炉的周边形成降水漏斗,可以防止气化炉以外的煤层水进入目标煤区,进而进入气化通道。 Further, since the funnel formed at the periphery of the gasifier precipitation, water may be prevented other than the seam coal gasifier into the target zone, the channel and further into the gasifier.

[0040] 以上结合附图详细描述了本发明的优选实施方式,但是,本发明并不限于上述实施方式中的具体细节,在本发明的技术构思范围内,可以对本发明的技术方案进行多种简单变型,这些简单变型均属于本发明的保护范围。 [0040] described above in conjunction with the accompanying drawings of the preferred embodiment of the present invention, however, the present invention is not limited to the specific details of the above embodiment, within the technical scope of the spirit of the present invention, various technical solutions of the present invention. simple variations, these simple modifications belong to the scope of the present invention.

[0041] 另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本发明对各种可能的组合方式不再另行说明。 [0041] Note further that each specific technical features of the above described embodiments, in the case where not contradictory, may be combined in any suitable manner, in order to avoid unnecessary repetition, the present invention each possible combinations without further explanation.

[0042] 此外,本发明的各种不同的实施方式之间也可以进行任意组合,只要其不违背本发明的思想,其同样应当视为本发明所公开的内容。 [0042] Further, among various embodiments of the present invention may be arbitrarily combined as long as it does not violate the spirit of the invention, which should also be considered as the disclosure of the present invention.

Claims (10)

  1. 1.一种煤炭地下气化炉控水系统,包括多个相互连通的排水通道和至少一个竖直排水井,排水通道和竖直排水井相连通,排水通道设置在煤炭地下气化炉的周边和底部,煤炭地下气化炉具有气化通道,其特征在于:排水通道通过煤层裂隙和煤炭地下气化炉的气化通道连通。 An underground coal gasification water control system comprising a plurality of interconnected drain passage and at least one vertical drainage wells, and a drain passage communicating the vertical drainage wells, the drainage channel is provided outside the underground coal gasification and a bottom, underground coal gasification furnace having a gasification passage, characterized in that: the drain passage through the cracks and seams underground gasification of coal gasification passage.
  2. 2.如权利要求1所述的煤炭地下气化炉控水系统,其特征在于:位于所述气化炉周边和底部的排水通道的长度大于气化炉相应方向的长度。 2. The underground coal gasification water control system according to claim 1, wherein: in said gasification furnace periphery and the length of the bottom drain passage direction greater than the length corresponding to the gasifier.
  3. 3.如权利要求2所述的煤炭地下气化炉控水系统,其特征在于:所述气化炉周边的排水通道到气化区域边界的距离大于5米,并且与最底部的气化通道持平或略低。 3. The underground coal gasification water control system according to claim 2, characterized in that: said gasification furnace to the outside of the drain passage from the gasification zone boundary is greater than 5 m, and the gasification channel and the bottommost flat or slightly lower.
  4. 4.如权利要求2所述的煤炭地下气化炉控水系统,其特征在于:所述气化炉底部的排水通道在煤层的气化通道以下的位置。 Underground coal gasification water control system according to claim 2, wherein: the location of the drain passage in the bottom of the gasifier coal gasification passage below.
  5. 5.如权利要求1所述的煤炭地下气化炉控水系统,其特征在于:所述相互连通的排水通道包括设置在气化炉周边的竖直段、造斜段、水平段和气化炉底部的水平段。 5. The underground coal gasification water control system according to claim 1, wherein: said mutual communication comprising a drain passage disposed in the gasification furnace peripheral vertical section, curve section, the horizontal section of the gasifier, and horizontal section at the bottom.
  6. 6.如权利要求5所述的煤炭地下气化炉控水系统,其特征在于:所述位于气化炉底部排水通道的水平段朝竖直排水井倾斜。 As claimed in claim 5, wherein the water control system of underground coal gasification, characterized in that: said horizontal section is located towards the bottom of the gasifier vertical drainage wells inclined drain passage.
  7. 7.如权利要求1所述的煤炭地下气化炉控水系统,其特征在于:所述竖直排水井一端位于煤层底板以下,另一端贯穿煤层和覆盖层与地表相连通,位于煤层及煤层底板的竖直排水井部分设置有滤水管,竖直排水井的其余部分设置钢套管。 7. The underground coal gasification water control system according to claim 1, wherein: said vertical drainage wells are located at one end the seam floor, the other end of the through seams and communicating with the surface coating layer, and the seam is located in seam the vertical plate portion of drainage wells is provided with a filter tube, the remainder of the vertically arranged steel drainage well casing.
  8. 8.如权利要求7所述的煤炭地下气化炉控水系统,其特征在于:所述竖直排水井内有排水装置。 Underground coal gasification water control system according to claim 7, wherein: said vertical drainage means drainage well.
  9. 9.一种煤炭地下气化炉的控水方法,其特征在于: 在气化炉的周边和底部设置多个相互连通的排水通道,使煤层中进入气化通道的水通过煤层裂隙流入排水通道; 设置竖直排水井,使所述排水通道的水流入竖直排水井并通过排水装置排出。 A method of controlling water underground coal gasification furnace, wherein: a plurality of interconnected drain passage disposed at the periphery and bottom of the gasifier into the gasifier in a coal seam through the water passage into the discharge channel bed Fracture ; drainage well disposed vertically, so that the water flows into the drain passage and the vertical drainage wells are drained through the drain means.
  10. 10.如权利要求9所述的控水方法,其特征在于:将所述气化炉周边的排水通道设置在距离气化区域边界5米以上,所述气化炉底部的排水通道在煤层的气化通道以下的位置。 10. The water control method according to claim 9, characterized in that: the drain passage is provided around a gasification furnace in the gasification zone at a distance of 5 m above the boundary of the drain passage at the bottom of the gasifier in a coal seam a position below the gasification channel.
CN 201410624098 2014-11-06 2014-11-06 Water control system and method for coal underground gasifier CN104453830A (en)

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