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CN107462689A - Calibration system and calibration method for coal underground gasification gas dissipation boundary - Google Patents

Calibration system and calibration method for coal underground gasification gas dissipation boundary Download PDF

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Publication number
CN107462689A
CN107462689A CN201710735171.2A CN201710735171A CN107462689A CN 107462689 A CN107462689 A CN 107462689A CN 201710735171 A CN201710735171 A CN 201710735171A CN 107462689 A CN107462689 A CN 107462689A
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detector
gas
coal
gasification
ucg
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徐斌
杜慧华
徐军
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Xinjiang Guo Liheng Clean Energy Technology Co ltd
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Xinjiang Guo Liheng Clean Energy Technology Co ltd
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    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/22Fuels; Explosives
    • G01N33/225Gaseous fuels, e.g. natural gas

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Abstract

The invention discloses a calibration system and a calibration method for coal underground gasification gas dissipation boundary, belonging to the technical field of coal underground gasification monitoring2Detector, H2The detector, the industrial switch and the DCS control system form an industrial control network. DCS control system for displaying CO detector and CO2Detector, H2CO and CO in the escaped coal gas collected by the detector2、H2Concentration and dissipation amount of (c). According to CO and CO in the gas displayed by the DCS control system in real time2、H2The concentration and the dissipation amount are compared and classified, different equivalent boundary curves can be formed after the positions of the vertical holes with equivalent dissipation gas concentration and dissipation amount are calibrated, and then coal gas dissipation boundaries with different gas concentrations and dissipation amounts are determined, so that the airtightness of the gasification furnace can be tracked and monitored, corresponding emergency measures can be taken in time, and production accidents caused by coal gas leakage can be prevented.

Description

A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method
Technical field
The present invention relates to underground coal gasification(UCG) monitoring technical field, and in particular to a kind of underground coal gasification(UCG) coal gas loss side Boundary's calibration system and its scaling method.
Background technology
Underground coal gasification(UCG) is that the coal in underground is controlledly burnt, and passes through the heat effect to coal and chemistry Effect produces the process of fuel gas.When exploiting coal seam in situ using hole drilling type coal underground gasification technology, after coal seam is heated It will gradually be developed centered on gasification furnace to surrounding, and extend to the border of gasification furnace in crack.Although gasification furnace surrounding has been set The barrier pillar of one fixed width is counted, but as the rise of coal seam gasification intensity in situ, the development degree of cracks in coal seam increase The risk of gas leak, therefore, it is necessary to set corresponding coal gas loss monitoring system in the stratum of gasification furnace surrounding, close closely The loss present situation of coal gas is noted, determines the coal gas loss border of different coal gas loss concentration and loss amount, should to take in time Anxious measure, avoid that extensive accident to leak the coal gas occurs.
Publication No. CN1673487A Chinese invention patent, disclose a kind of underground gasification furnace operating state monitoring system System, it is divided into monitoring and stove external monitor and injection, output monitoring three subsystems in stove, realizes underground gasification furnace operation state Direct monitoring.The monitoring system is to install protection pipe in monitoring drilling in gas channel and gasification furnace, and monitoring is installed in pipe Device, directly gather gasifier operation state parameter.If necessary monitoring lane and the drilling of stove external monitor, hole are laid in gasification furnace periphery Interior layering sets the outer state sensor group of stove, directly gathers the state parameter of gasification furnace periphery.All information of collection are sent to In information processing, storage, display device, gasification carry out state is understood accordingly, takes corresponding measure in time.This monitoring system is only Only it is used for monitoring the operation state of underground gasification furnace, the loss situation of coal gas in the stratum of gasification furnace surrounding is not supervised Survey, and as it was previously stated, with the rise of coal seam gasification intensity in situ, the development degree of cracks in coal seam increases the wind of gas leak Danger, therefore, it is necessary to set corresponding coal gas loss monitoring system in the stratum of gasification furnace surrounding, pay close attention to the loss of coal gas Present situation, the coal gas loss border of different coal gas loss concentration and loss amount is determined, to take emergency measures in time, avoids sending out Raw extensive accident to leak the coal gas.This is based on, the present invention devises a kind of underground coal gasification(UCG) coal gas loss boundary demarcation System and its scaling method.
The content of the invention
It is an object of the invention to provide a kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method, It can monitor the coal gas loss present situation of gasification furnace surrounding, determine the coal gas loss side of different coal gas loss concentration and loss amount Boundary.
To achieve these goals, the present invention provides following technical scheme:
A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system, including:
Multiple upright openings, it is evenly distributed on the surrounding of gasification furnace;
Industrial switch and DCS control systems, both are connected with each other;
Carbon monoxide detector, CO2Detector, H2Detector, three are connected with the industrial switch, and are placed on described In upright opening.
Preferably, multiple upright openings are set in double-layer circular annular around gasification furnace.
Preferably, the quantity of upright opening is eight on each layer of annulus, the center of each upright opening and double-layer circular ring Ring heart line be in " rice " font.
Preferably, the bottom of the upright opening is located at the bottom plate in coal seam.
Preferably, stone and activated carbon have been sequentially filled from bottom to top in the upright opening.
Preferably, the packed height of the stone and activated carbon is higher than groundwater level.
Preferably, the carbon monoxide detector, CO2Detector, H2Detector is surrounded by the activated carbon.
Preferably, the width of the width of the stone and the activated carbon is the 1/4~1/ of the upright opening aperture 3。
Preferably, the concentration range for the CO that the carbon monoxide detector is detected is 12.5%~74%, the CO2Detector The CO detected2Concentration range be 12%~70%, the H2The H that detector is detected2Concentration range be 5%~75%.
A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system described in any of the above-described, its scaling method are as follows:
In gasification, according to CO, CO in the gas of DCS control system real-time displays2、H2Concentration and loss amount, by gas CO, CO in body2、H2The upright opening location position of concentration and loss amount equivalence, draw the equivalent side of gas with various concentration and loss amount Boundary's curve, determine the coal gas loss border of gas with various concentration and loss amount in gasification furnace surrounding subterranean formation zone;Work as gas escape When amount exceedes 1/10 of corresponding gas flow in coal gas, then leakage point position can be determined according to equivalent boundary curve.
Underground coal gasification(UCG) coal gas loss boundary demarcation system provided by the present invention and its scaling method, carbon monoxide detector, CO2Detector, H2Detector, industrial switch and DCS control systems constitute industrial control network.DCS control systems are used to show Show carbon monoxide detector, CO2Detector, H2CO, CO in the loss coal gas that detector is gathered2、H2Concentration and loss amount.According to DCS CO, CO in the gas of control system real-time display2、H2Concentration and loss amount, are compared, classify, by loss gas concentration and ease After dissipating the equivalent upright opening location position of amount, different equivalent boundary curves can be formed, so determine gas with various concentration and The coal gas loss border of loss amount, so as to the seal of tracking and monitoring gasification furnace, takes corresponding emergency measure, in advance in time Production accident caused by gas leakage preventing.
Brief description of the drawings
, below will be to institute in embodiment in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only one described in the present invention A little embodiments, for those of ordinary skill in the art, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the top view of underground coal gasification(UCG) coal gas loss boundary demarcation system provided in an embodiment of the present invention;
Fig. 2 is the sectional view of underground coal gasification(UCG) coal gas loss boundary demarcation system provided in an embodiment of the present invention.
Description of reference numerals:
1st, upright opening;2nd, industrial switch;3rd, DCS control systems;4th, carbon monoxide detector;5、CO2Detector;6、H2Detector; 7th, stone;8th, activated carbon;9th, gasification furnace.
Embodiment
In order that those skilled in the art more fully understands technical scheme, below in conjunction with accompanying drawing to this hair It is bright to be further detailed.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability includes, so that process, method, article or terminal device including a series of elements not only include those Key element, but also the other element including being not expressly set out, or it is this process, method, article or end also to include The intrinsic key element of end equipment.In the absence of more restrictions, limited by sentence " including ... " or " including ... " Key element, it is not excluded that other key element in the process including the key element, method, article or terminal device also be present.This Outside, herein, " being more than ", " being less than ", " exceeding " etc. are interpreted as not including this number;" more than ", " following ", " within " etc. understand It is to include this number.
As depicted in figs. 1 and 2, a kind of underground coal gasification(UCG) coal gas loss boundary demarcation system, including upright opening 1, industry Interchanger 2, DCS control systems 3, CO (carbon monoxide) detector 4, CO2(carbon dioxide) detector 5, H2(hydrogen) detector 6. Wherein, industrial switch 2, also referred to as industrial ethernet switch, the i.e. Ethernet switch applied to industrial control field are set It is standby, due to the network standard of use, its opening is good, be widely used and it is cheap, use it is transparent and unified ICP/IP protocol, Ethernet have become the Primary communication standard of industrial control field.Industrial switch has carrier class performance Feature, it can tolerate harsh working environment.Product line is enriched, and port configuration is flexible, can meet the use of various industrial circles Demand.DCS controls are 3, and Distributed Control System abbreviation DCS (Distributed Control System) can also literal translate " to divide Dissipate control system " or " distributed computer control system ".The Basic Design that it is disperseed using control, operation and management are concentrated is thought Think, using the autonomous structure type of multi-layer classification, cooperation.CO (carbon monoxide) detector 4, CO2(carbon dioxide) detector 5, H2 (hydrogen) detector 6 is respectively used to CO (carbon monoxide), CO in detection gas2(carbon dioxide), H2(hydrogen).Upright opening 1 is It is multiple, it is evenly distributed on the surrounding of gasification furnace 9.As shown in figure 1, in the present embodiment, multiple upright openings 1 are in double-layer circular annular ring Set around gasification furnace 9, it is further preferred that the quantity of upright opening 1 is eight on each layer of annulus, in each upright opening 1 The ring heart line of the heart and double-layer circular ring is in " rice " font.Such structure, both facilitates punching, and and can ensures the precision of demarcation.Industry Interchanger 2 and DCS control systems 3 are connected with each other.Carbon monoxide detector 4, CO2Detector 5, H2Detector 6, three exchange with industry Machine 2 is connected, and this three is placed in upright opening 1.Industrial switch 2, DCS control systems 3, carbon monoxide detector 4, CO2Inspection Survey instrument 5, H2Detector 6 constitutes industrial control network.DCS control systems 3 are used to show carbon monoxide detector 4, CO2Detector 5, H2 CO, CO in the loss coal gas that detector 6 is gathered2、H2Concentration and loss amount.Preferably, carbon monoxide detector 4, CO2Detector 5, H2Detector 6 is respectively provided with waterproof, alarm and the function of exporting analog signal.The concentration range for the CO that carbon monoxide detector 4 is detected is 12.5%~74%, CO2The CO that detector 5 is detected2Concentration range be 12%~70%, H2The H that detector 6 is detected2's Concentration range is 5%~75%.
When opening up upright opening 1, as shown in Fig. 2 the bottom of upright opening 1 is located at the bottom plate in coal seam, in upright opening 1 under Stone 7 and activated carbon 8 have been sequentially filled on and.Preferably, the width of the width of stone 7 and activated carbon 8 is the aperture of upright opening 1 1/4~1/3, carbon monoxide detector 4, CO2Detector 5, H2Detector 6 is surrounded by activated carbon 8, and the filling of stone 7 and activated carbon 8 is high Degree is higher than groundwater level, and such structure both can be that gas reserves enough seepage channels, reduce osmotic resistance, can prop up again Each detector is supportted, makes each detector avoid causing to damage after into water away from underground water.
Above-mentioned underground coal gasification(UCG) coal gas loss boundary demarcation system, before coal seam gasification process starts, system is carried out Installation, debugging.It is sequentially filled stone 7, activated carbon 8 from top to bottom into the upright opening 1 of the surrounding of gasification furnace 9 first, and is put into each Individual detector, it is ensured that detector is surrounded by activated carbon 8;Then the output signal of each detector is conveyed through industrial switch 2 Debugged into DCS control systems 3, and to whole industrial network.
The underground coal gasification(UCG) coal gas loss boundary demarcation system, its scaling method are as follows:
In gasification, carbon monoxide detector 4, CO2Detector 5, H2CO, CO in 6 real-time detection gas of detector2、H2Concentration With loss amount, and uploaded to by industrial switch 2 in DCS control systems 3, DCS control systems 3 be used to showing carbon monoxide detector 4, CO2Detector 5, H2CO, CO in the loss coal gas that detector 6 is gathered2、H2Concentration and loss amount.
According to CO, CO in the gas of DCS control system real-time displays2、H2Concentration and loss amount, by CO, CO in gas2、H2 The upright opening location position of concentration and loss amount equivalence, the equivalent boundary curve of gas with various concentration and loss amount is drawn, it is determined that The coal gas loss border of gas with various concentration and loss amount in gasification furnace surrounding subterranean formation zone;When gas escape amount exceedes in coal gas Corresponding gas flow 1/10 when, DCS control systems 3 carry out overload alarm, and determine leakage point position according to equivalent boundary curve Put, take emergency measures, reduce the leakiness of coal gas.
The underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method that the present embodiment is provided, carbon monoxide detector 4、CO2Detector 5, H2Detector 6, industrial switch 2 and DCS controls are that 3 systems constitute industrial control network.DCS control systems 3 are used to show carbon monoxide detector 4, CO2Detector 5, H2CO, CO in the loss coal gas that detector 6 is gathered2、H2Concentration and loss Amount.According to CO, CO in the gas of the real-time display of DCS control systems 32、H2Concentration and loss amount, are compared, classify, by loss After the upright opening location position of gas concentration and loss amount equivalence, different equivalent boundary curves can be formed, and then determine not With the coal gas loss border of gas concentration and loss amount, so as to the seal of tracking and monitoring gasification furnace, take in time corresponding Emergency measure, production accident caused by pre- gas leakage preventing.
Some one exemplary embodiments of the present invention are only described by way of explanation above, undoubtedly, for ability The those of ordinary skill in domain, without departing from the spirit and scope of the present invention, can be with a variety of modes to institute The embodiment of description is modified.Therefore, above-mentioned accompanying drawing and description are inherently illustrative, should not be construed as to the present invention The limitation of claims.

Claims (10)

  1. A kind of 1. underground coal gasification(UCG) coal gas loss boundary demarcation system, it is characterised in that including:
    Multiple upright openings, it is evenly distributed on the surrounding of gasification furnace;
    Industrial switch and DCS control systems, both are connected with each other;
    Carbon monoxide detector, CO2Detector, H2Detector, three are connected with the industrial switch, and are placed on described vertical In hole.
  2. 2. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 1, it is characterised in that multiple vertical Hole is set in double-layer circular annular around gasification furnace.
  3. 3. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 2, it is characterised in that each layer of circle The quantity of upright opening is eight on ring, and the center of each upright opening and the ring heart line of double-layer circular ring are in " rice " font.
  4. 4. underground coal gasification(UCG) coal gas loss boundary demarcation system according to any one of claim 1 to 3, its feature exist In the bottom of the upright opening is located at the bottom plate in coal seam.
  5. 5. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 4, it is characterised in that described vertical Stone and activated carbon have been sequentially filled in hole from bottom to top.
  6. 6. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 5, it is characterised in that the stone It is higher than groundwater level with the packed height of activated carbon.
  7. 7. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 6, it is characterised in that the CO inspections Survey instrument, CO2Detector, H2Detector is surrounded by the activated carbon.
  8. 8. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 5, it is characterised in that the stone Width and the width of the activated carbon be the 1/4~1/3 of the upright opening aperture.
  9. 9. underground coal gasification(UCG) coal gas loss boundary demarcation system according to claim 1, it is characterised in that the CO inspections The concentration range for surveying the CO that instrument is detected is 12.5%~74%, the CO2The CO that detector is detected2Concentration range be 12%~70%, the H2The H that detector is detected2Concentration range be 5%~75%.
  10. 10. a kind of underground coal gasification(UCG) coal gas loss boundary demarcation system as claimed in any one of claims 1-9 wherein, it is marked It is as follows to determine method:
    In gasification, according to CO, CO in the gas of DCS control system real-time displays2、H2Concentration and loss amount, by gas CO、CO2、H2The upright opening location position of concentration and loss amount equivalence, the equivalent border for drawing gas with various concentration and loss amount are bent Line, determine the coal gas loss border of gas with various concentration and loss amount in gasification furnace surrounding subterranean formation zone;When gas escape amount surpasses When crossing 1/10 of corresponding gas flow in coal gas, then leakage point position can be determined according to equivalent boundary curve.
CN201710735171.2A 2017-08-24 2017-08-24 Calibration system and calibration method for coal underground gasification gas dissipation boundary Pending CN107462689A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456024A (en) * 2019-08-23 2019-11-15 中国石油大学(华东) A kind of method and system for analyzing gas hydrates stable region boundary carbon cycle process
CN113031061A (en) * 2021-04-02 2021-06-25 中油奥博(成都)科技有限公司 Gasification cavity boundary identification method

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CN207148097U (en) * 2017-08-24 2018-03-27 新疆国利衡清洁能源科技有限公司 Calibration system for coal underground gasification coal gas dissipation boundary

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CN1667241A (en) * 2005-02-02 2005-09-14 辽宁工程技术大学 Symbolic gas detecting, regulating and controlling method for underground coal gasification
CN1673487A (en) * 2005-04-05 2005-09-28 大雁煤业有限责任公司 Underground gasification furnace operating state monitoring system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456024A (en) * 2019-08-23 2019-11-15 中国石油大学(华东) A kind of method and system for analyzing gas hydrates stable region boundary carbon cycle process
CN113031061A (en) * 2021-04-02 2021-06-25 中油奥博(成都)科技有限公司 Gasification cavity boundary identification method

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