CN107462689A - A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method - Google Patents
A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method Download PDFInfo
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- 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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- 238000002309 gasification Methods 0.000 title claims abstract description 63
- 239000003034 coal gas Substances 0.000 title claims abstract description 54
- 239000003245 coal Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 239000004575 stone Substances 0.000 claims description 11
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 17
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 26
- 229910002092 carbon dioxide Inorganic materials 0.000 description 21
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
Abstract
The invention discloses a kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method, it belongs to underground coal gasification(UCG) monitoring technical field, carbon monoxide detector, CO in the calibration system2Detector, H2Detector, industrial switch and DCS control systems constitute industrial control network.DCS control systems are used to show carbon monoxide detector, CO2Detector, H2CO, CO in the loss coal gas that detector is gathered2、H2Concentration and loss amount.According to CO, CO in the gas of DCS control system real-time displays2、H2Concentration and loss amount, it is compared, classifies, after the equivalent upright opening location position of loss gas concentration and loss amount, different equivalent boundary curves can be formed, and then determine the coal gas loss border of gas with various concentration and loss amount, so as to the seal of tracking and monitoring gasification furnace, corresponding emergency measure, production accident caused by pre- gas leakage preventing are taken in time.
Description
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)
- 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. 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. 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. 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. 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. 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. 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. 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. 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. 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.
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| CN201710735171.2A CN107462689A (en) | 2017-08-24 | 2017-08-24 | A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method |
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| CN201710735171.2A CN107462689A (en) | 2017-08-24 | 2017-08-24 | A kind of underground coal gasification(UCG) coal gas loss boundary demarcation system and its scaling method |
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Application publication date: 20171212 |
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| RJ01 | Rejection of invention patent application after publication |