CN110219636A - A kind of coal underground gasifying furnace note exhaust drilled tunnel heat insulating and sealing method for blocking - Google Patents
A kind of coal underground gasifying furnace note exhaust drilled tunnel heat insulating and sealing method for blocking Download PDFInfo
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- CN110219636A CN110219636A CN201910531979.8A CN201910531979A CN110219636A CN 110219636 A CN110219636 A CN 110219636A CN 201910531979 A CN201910531979 A CN 201910531979A CN 110219636 A CN110219636 A CN 110219636A
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- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000000903 blocking effect Effects 0.000 title claims abstract description 8
- 238000002309 gasification Methods 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 239000011435 rock Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000000945 filler Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000012806 monitoring device Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 1
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000011218 segmentation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 63
- 230000000694 effects Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of coal underground gasifying furnaces to infuse exhaust drilled tunnel heat insulating and sealing method for blocking, drilled tunnel is infused/be vented to gasification reacting furnace closed I sections and Φ II sections of drilled tunnel Φ close to the segmentation reaming building of floor rock lane side in situ, installs Φ I sections of drilled tunnel and separates casing and using the gap between I sections of drilled tunnel walls of high-strength high temperature-resistant material primary filling Φ and separation casing I outer wall；Φ II sections of drilled tunnel casing is installed and Φ II sections of drilled tunnel wall is filled using high-strength high temperature-resistant material secondary and separates the gap between casing II outer wall, and sets solid and blocks building block；In the front end and terminal position for separating the bottom casing I and II temperature thermocouple is installed respectively, the lead of temperature thermocouple is guided on the temperature monitoring system in floor rock lane；Fill three times: installation fills the end baffle that Φ II sections of drilled tunnel separates casing II, and fills the separation casing I of II sections of drilled tunnels of Φ I sections of drilled tunnel and Φ by filling mouth and separate inside casing II, and filling high temperature resistant cement is closely knit to filling.Present invention has the advantages that not only having carried out leakage that is good heat-insulated, but also preventing high-temperature gas to tunnel part note gas exhaust piping.
Description
Technical field
The invention belongs to technical field of coal exploitation, and it is heat-insulated close to be related to a kind of coal underground gasifying furnace note exhaust drilled tunnel
Close method for blocking.
Background technique
Underground coal gasification(UCG) is a kind of novel coal resources original position fluidization recovery method, in underground gasification process, by
Gas injecting pipe outside gasification furnace reaction interface injection air, oxygen, saturated steam or its mixed gas into gasification furnace, on ground
Pyroreaction interface generates the gas (including: carbon monoxide, hydrogen, methane, carbon dioxide etc.) of high temperature in lower gasification furnace, by
Gasification furnace externally connected exhaust pipe road enters outside network and is transported to ground.In order to guarantee the air-tightness of coal underground gasifying furnace,
It prevents from high temperature toxic gas from leaking into external tunnel to damage personnel, needs to connect in underground gasification furnace with external tunnel
Note vent drill hole path part carry out closed closure.In the case that patent CN107387055A is using mobile gas injecting pipe,
In gasification furnace there is the possibility leaked from pipeline outside with vias inner walls gap to tunnel, and underground coal gasification(UCG) in high-temperature gas
The product gas temperature of technique is higher, and exhaust passage gas temperature is up to 200~300 DEG C, especially gasifier operation later period, furnace
Interior high-temperature region is close to stopping adopting near line, and exhaust passage gas temperature is up to 400~500 DEG C.Therefore, it is necessary to consider coal underground gas
Change the heat-insulating problem of overall process exhaust passage coal gas of high temperature.So how real under the conditions of high-temperature gas in coal underground gasifying furnace
Now to pipeline outer passage it is effective it is closed closure and realize it is appropriate it is heat-insulated be this patent main problem to be solved.It is existing
In technical solution, there is well formula to build isolation fire dam in the tunnel that furnace mode constructs, it is difficult to hyperbar in gasification furnace (in gasification furnace
Pressure is up to 1~2MPa) situation carry out available gas isolation it is closed, since the fissure zone formed around tunnel is more developed, only
It is difficult to effectively block high pressure gas by solid divider wall, gas leakage will necessarily be generated.Existing isolation fire dam, does not have
In view of influence of the high temperature action to plugging material of gasification furnace gas.Existing technical solution, not for coal seam in situ
The heat insulating and sealing for the note exhaust drilled tunnel section that reacting furnace is connected to floor rock lane blocks scheme, which, which blocks, requires
Floor rock lane personnel operating space is completely isolated with high temperature, the high pressure gas in coal seam reacting furnace in situ, to ensure bottom plate
Rock lane operating space personnel's is perfectly safe.
Summary of the invention
The purpose of the present invention is to provide a kind of coal underground gasifying furnaces to infuse exhaust drilled tunnel heat insulating and sealing method for blocking,
The method of the present invention can effectively solve the problems, such as that high-temperature gas and being isolated for extraneous lane space are closed in coal underground gasifying furnace；Its
Beneficial effect is not only to have carried out leakage that is good heat-insulated, but also preventing high-temperature gas to tunnel part note gas exhaust piping, is increased
Safety, improves safety benefit.
The technical scheme adopted by the invention is that following the steps below:
Step 1: on the basis of gas injection drilled tunnel or exhaust drilled tunnel, filling sealing drilling: being constructed by reaming
II sections of drilled tunnels of I sections of drilled tunnels of Φ and Φ；
Step 2, Φ I sections of drilled tunnel casing is installed: separating casing I in I sections of drilled tunnel installations of Φ；
Step 3, it primary filling: outside the separation casing I of I sections of drilled tunnels of Φ, is filled using high-strength high temperature-resistant material
Gap between conduit wall and separation casing I outer wall, and the crack of drilled tunnel wall surface can be blocked, filling is closely knit and to material
It is fully hardened；
Step 4, Φ II sections of drilled tunnel casing is installed: separating casing II in II sections of drilled tunnel installations of Φ of sealing, point
Insertion separates inside casing II in the front end spacer pipe II, can be realized more close combination, by the barrier action of pipeline, prevents
The only inside that is flowed into separation casing I and separates casing II excessive when filling high temperature resistant filler；
Step 5, it secondary filling: outside the separation casing II of II sections of drilled tunnels of Φ, is filled out using high-strength high temperature-resistant material
Fill conduit wall and separate the gap between casing II outer wall, and the crack of drilled tunnel wall surface can be blocked, fill it is closely knit and to
Material is fully hardened, and close to outer floor rock lane wall surface one end, installing solid blocks building block；
Step 6, temperature thermocouple is installed: the front end of the separation bottom casing I in I sections of drilled tunnels of Φ and terminal position
2 temperature thermocouples are installed respectively, the front end of the separation bottom casing II in II sections of drilled tunnels of Φ and terminal position difference
2 temperature thermocouples are installed, 4 temperature thermocouples of installation is amounted to, the lead of temperature thermocouple is guided in floor rock lane
On temperature monitoring system；
Step 7, fill three times: installation fills Φ II sections of drilled tunnel and separates the end baffle of casing II, and passes through filling
Mouth is separating casing I and is separating inside casing II, and filling high temperature resistant cement is closely knit to filling.
Further, it before gasifier operation, needs to closed section of progress air-leakage test, i.e., closed section outside closing gasification furnace
Exhaust passage pipeline valve injects the gas of certain pressure, monitoring gasification by gas injection pipeline or gas exhaust piping into gasification furnace
The leakage situation and gas pressure changing of furnace pressure, while exhaust closed section of wall surface of drilled tunnel is infused in floor rock lane
Air-leakage test liquid, such as discovery detection liquid bubble are smeared, then illustrates that this closed section has gas leakage point, it is right to need again
The note is vented closed section of drilled tunnel and carries out closed work；If not finding liquid bubble, and the furnace pressure that gasifies is stablized, pressure-bearing
Situation is preferable, and leak rate is within zone of reasonableness, then it is assumed that the closed work is qualified, during gasifier operation, close
Note is vented above closed section of drilled tunnel of floor rock tunnel wall surface, hangs CO detector, real-time monitoring CO gas
Concentration, and alarm, if CO concentration is continued above a certain concentration, excluding the raised base of CO concentration caused by other factors
On plinth, can conclude that it is that CO concentration caused by being leaked due to the closed section of gas is increased, need to carry out pause gasifying agent to gasification furnace
Injection, the operation that rests processing, and take certain means to this closed section progress grouting and reinforcing, enhance air-tightness, is wanted in satisfaction
In the case where asking, restore to inject the gasifying agent of underground gasification furnace, resume operation coal underground gasifying furnace.
Further, gas injection drilled tunnel or exhaust drilled tunnel are divided into II sections of drilled tunnels of I sections of drilled tunnels of Φ and Φ, have
There is different internal diameters, wherein the interior diameter of Φ I sections of drilled tunnels is greater than gas injection pipeline or gas exhaust piping diameter 0.5m~1.0m,
The length is 3~5m, the interior diameter of II sections of drilled tunnels of Φ is greater than the interior diameter 0.5m~1.0m of I sections of drilled tunnels of Φ,
Length is 3~5m, and the diameter for separating casing I is greater than gas injection pipeline or gas exhaust piping diameter 0.4m~0.8m, casing length with
It is identical that the section seals drilled tunnel length；The diameter for separating casing II is greater than the diameter 0.4m~0.8m for separating casing I, casing
Length is identical as section sealing drilled tunnel length, and separating casing I, ring is all at a certain distance with casing II outside wall surface is separated
It arranges a set isolation casing I supporting block and separates casing II supporting block, be arc steel stabilizer blade, it is highly 5cm that one group, which is 4 pieces,
~15cm, high-strength high temperature-resistant material are to be filled in separate sleeve outer wall and gas injection drilled tunnel or exhaust drilled tunnel inner wall
Between hole filler, tolerable temperature range be room temperature~600 DEG C, high temperature resistant cement be filling with separate inside pipe casing
Filler, have the characteristics that high temperature resistant, intensity are high, can effectively completely cut off note exhaust passage pipeline in high-temperature gas heat,
Temperature monitoring system includes being distributed in separate the temperature thermocouple in inside pipe casing filler and the temperature in floor rock lane
Monitoring device is spent, the temperature value on the outside of gas injection pipeline or gas exhaust piping can be monitored.
Detailed description of the invention
Fig. 1 is that heat insulating and sealing blocks whole elevation；
Fig. 2 is to separate cannula structure figure；
Fig. 3 is A-A sectional view；
Fig. 4 is B-B sectional view；
Fig. 5 is C-C sectional view.
In figure: 1- gas injection pipeline or gas exhaust piping；2- separates casing I；3- separates casing I supporting block；4- separates casing II；
5- separates casing II supporting block；The end 6- baffle；7- fills mouth；8- fills gas vent；9- high-strength high temperature-resistant material；10- is resistance to
High-temperature cement；11- solid blocks building block；I sections of drilled tunnels of 12- Φ；II sections of drilled tunnels of 13- Φ；The rock stratum 14-；15- thermometric heat
Galvanic couple；16- temperature monitoring system；17- gas injection drilled tunnel or exhaust drilled tunnel；18-CO detector.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The present invention is as shown in Figures 1 to 5, and gas injection drilled tunnel or exhaust drilled tunnel 17 is arranged close to floor rock lane one
The separation set for sealing II sections of drilled tunnels 13 of I sections of drilled tunnels 12 of drilled tunnel Φ and Φ, different-diameter of the different-diameter at end
Pipe I 2 and separation casing II 4, high-strength high temperature-resistant material 9, high temperature resistant cement 10 and temperature monitoring system 16.Gas injection drilling
Channel or exhaust drilled tunnel 17 are to construct from coal underground gasifying furnace floor rock lane, are bored to coal underground gasifying furnace gas injection
The channel of hole path and exhaust drilled tunnel reaming, the channel are divided into I sections and Φ II sections of Φ, have different internal diameters, wherein Φ I
The interior diameter of section drilled tunnel 12 is greater than 1 diameter 0.5m~1.0m of gas injection pipeline or gas exhaust piping, and length is generally 3~
The interior diameter of II sections of drilled tunnels 13 of 5m, Φ is greater than the interior diameter 0.5m~1.0m of I sections of drilled tunnels 12 of Φ, and the length is 3
~5m.The diameter for separating casing I 2 is greater than 1 diameter 0.4m~0.8m of gas injection pipeline or gas exhaust piping, casing length and the section
It is identical to seal drilled tunnel length；The diameter for separating casing II 4 is greater than the diameter 0.4m~0.8m for separating casing I 2, casing
Length is identical as section sealing drilled tunnel length.Separate casing I 2 and separates 4 outside wall surface of casing II at a certain distance
It arranges a set isolation casing I supporting block 3 ring week and separates casing II supporting block 5, be arc steel stabilizer blade, one group is 4 pieces, is played
The effect that support separates casing 2 and gas injection drilled tunnel or is vented 17 gap of drilled tunnel, is highly 5cm~15cm, for filling
Material provides space.
High-strength high temperature-resistant material 9 is to be filled in separate 2 outer wall of casing and gas injection drilled tunnel or exhaust drilled tunnel 17
The filler of hole between inner wall has the characteristics that high temperature resistant, intensity are high, and tolerable temperature range is room temperature~600 DEG C,
There is effective air-tightness to high temperature and high pressure gas.High temperature resistant cement 10 is filling and the filler inside separation casing 2, tool
Have the characteristics that high temperature resistant, intensity are high, can effectively completely cut off the heat of high-temperature gas in note exhaust passage pipeline.Temperature monitoring system 16
Temperature thermocouple 15 including being distributed in separation 2 inside filler of casing and the temperature monitoring in floor rock lane are set
It is standby, the temperature value in 1 outside of gas injection pipeline or gas exhaust piping can be monitored.
Step 1: drilling: close by reaming building filling on the basis of gas injection drilled tunnel or exhaust drilled tunnel 17
II sections of drilled tunnels 13 of I sections of drilled tunnels 12 of Φ and Φ of envelope；
Step 2, Φ I sections of 12 casing of drilled tunnel is installed: separating casing I 2 in I sections of installations of drilled tunnel 12 of Φ；
Step 3, primary filling: outside the separation casing I 2 of I sections of drilled tunnels 12 of Φ, using high-strength high temperature-resistant material 9
Gap between filling channel wall and separation 2 outer wall of casing I, and the crack of drilled tunnel wall surface can be blocked, filling is closely knit simultaneously
It is fully hardened to material；
Step 4, Φ II sections of 13 casing of drilled tunnel is installed: separating casing II in II sections of installations of drilled tunnel 13 of Φ of sealing
4, separate insertion in 4 front end casing II and separate inside casing II 2, can be realized more close combination, pass through the resistance of pipeline
Every effect, prevent excessive being flowed into when filling high temperature resistant filler 9 from separating casing I 2 and separating in casing II 4
Portion；
Step 5, secondary filling: outside the separation casing II 4 of II sections of drilled tunnels 13 of Φ, using high-strength high temperature-resistant material
Expect 9 filling channel walls and separate the gap between 4 outer wall of casing II, and the crack of drilled tunnel wall surface can be blocked, fills close
It is real and fully hardened to material, and close to outer floor rock lane wall surface one end, installing solid blocks building block 11；
Step 6, temperature thermocouple is installed: the front end and end of separation 2 bottom casing I in I sections of drilled tunnels 12 of Φ
2 temperature thermocouples 15 are installed in position respectively, the front end and end of separation 4 bottom casing II in II sections of drilled tunnels 13 of Φ
End position installs 2 temperature thermocouples 15 respectively, amounts to 4 temperature thermocouples of installation, the lead of temperature thermocouple is guided to bottom
On temperature monitoring system 16 in slate stone lane；
Step 7, fill three times: installation fills Φ II sections of drilled tunnel 13 and separates the end baffle of casing II 4, and passes through
Mouth 7 is filled in the separation casing I 2 of II sections of drilled tunnels 13 of I sections of drilled tunnels 12 of Φ and Φ and is separated inside casing II 4, is filled out
It is closely knit to filling to fill high temperature resistant cement 10；
Step 8: being the heat insulating and sealing closure work for completing note exhaust drilled tunnel by aforesaid operations, transported in gasification furnace
Before row, need to this closed section progress air-leakage test, i.e., closed section of exhaust passage pipeline valve, passes through outside closing gasification furnace
Gas injection pipeline or gas exhaust piping 1 inject the gas of certain pressure into gasification furnace, the leakage situation of monitoring gasification furnace pressure and
Gas pressure change situation, while infusing exhaust closed section of wall surface of drilled tunnel in floor rock lane and smearing air-leakage test liquid,
It such as finds detection liquid bubble, then illustrates that this closed section has gas leakage point, need again close to note exhaust drilled tunnel
It closes section and carries out closed work；If not finding liquid bubble, and the furnace pressure that gasifies is stablized, pressure-bearing situation is preferable, and leak rate exists
Within zone of reasonableness, then it is assumed that the closed work is qualified, during gasifier operation, closed close to note exhaust drilled tunnel
Above the floor rock tunnel wall surface of section, CO detector 18, the concentration of real-time monitoring CO gas are hung, and alarm,
If CO concentration is continued above a certain concentration, exclude CO concentration caused by other factors it is raised on the basis of, can conclude that be by
CO concentration caused by closed section of gas leaks increases, and needs to carry out gasification furnace to suspend gasifying agent injection, rests at operation
Reason, and take certain means to this closed section progress grouting and reinforcing, enhance air-tightness, in the case where meeting the requirements, restores
Gasifying agent injection to underground gasification furnace, resume operation coal underground gasifying furnace.
The present invention uses the method for carrying out reaming to coal underground gasifying furnace note exhaust passage drilling, constructs two sections of differences
The sealing filling borehole channel of internal diameter is operated as coal seam reacting furnace in situ and the filling of the heat insulating and sealing in outer floor rock lane
Channel.It is nested respectively inside it to separate casing to the sealing filling borehole channel of two sections of different inner diameters of building, it will fill
Space is divided into two parts, first is that separating the gap between casing and vias inner walls, is carried out using high temperature resistance and high strength filler
Filling, and the crack of drilled tunnel wall surface can be blocked, it can effectively completely cut off the high temperature and high pressure gas leakage in gasification furnace；Second is that point
It every internal casing space, is filled, the high-temperature gas heat in exhaust drilling can be completely cut off using high temperature resistant cement.
Advantage of the present invention also resides in:
(1) the heat-insulating and sealing channel of this patent is located in seat earth rock, carries out construction behaviour from seat earth rock lane
Make, easy to operate, safety is good, and sealing effect is good.
(2) program only needs to construct more light-gauge drilled tunnel, can be realized to the height in coal seam reacting furnace in situ
The isolation completely of warm high pressure gas and extraneous personnel operating space is closed, and investment is small, and construction is fast, simple and easy to do.
(3) program is segmented different filling spaces using different fillers, subregion fills, and operation is feasible, close
It is good to seal effect.
The above is only not to make limit in any form to the present invention to better embodiment of the invention
System, any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (3)
1. a kind of coal underground gasifying furnace note exhaust drilled tunnel heat insulating and sealing method for blocking, it is characterised in that according to the following steps
It carries out:
Step 1: on the basis of gas injection drilled tunnel or exhaust drilled tunnel, the Φ I of filling sealing drilling: is constructed by reaming
Section II sections of drilled tunnels of drilled tunnel and Φ；
Step 2, Φ I sections of drilled tunnel casing is installed: separating casing I in I sections of drilled tunnel installations of Φ；
Step 3, primary filling: outside the separation casing I of I sections of drilled tunnels of Φ, using high-strength high temperature-resistant material filling channel
Gap between wall and separation casing I outer wall, and the crack of drilled tunnel wall surface can be blocked, it fills closely knit and complete to material
Hardening；
Step 4, Φ II sections of drilled tunnel casing is installed: separating casing II in II sections of drilled tunnel installations of Φ of sealing, separates set
Insertion separates inside casing II in the front end pipe II, and can be realized more close combination is prevented by the barrier action of pipeline
Excessive being flowed into separates the inside of casing I and separation casing II when filling high temperature resistant filler；
Step 5, it secondary filling: outside the separation casing II of II sections of drilled tunnels of Φ, is filled using high-strength high temperature-resistant material logical
Gap between road wall and separation casing II outer wall, and the crack of drilled tunnel wall surface can be blocked, filling is closely knit and to material
It is fully hardened, and close to outer floor rock lane wall surface one end, installing solid blocks building block；
Step 6, temperature thermocouple is installed: the front end of the separation bottom casing I in I sections of drilled tunnels of Φ and terminal position difference
2 temperature thermocouples are installed, the front end of the bottom separation casing II in II sections of drilled tunnels of Φ and terminal position install 2 respectively
A temperature thermocouple amounts to 4 temperature thermocouples of installation, and the lead of temperature thermocouple is guided to the prison of the temperature in floor rock lane
On examining system；
Step 7, fill three times: installation fills the end baffle that Φ II sections of drilled tunnel separates casing II, and is existed by filling mouth
Separate casing I and separate inside casing II, filling high temperature resistant cement is closely knit to filling.
2. exhaust drilled tunnel heat insulating and sealing method for blocking is infused according to a kind of coal underground gasifying furnace described in claim 1, it is special
Sign is: before the gasifier operation, needing to closed section of progress air-leakage test, i.e., closed section of exhaust outside closing gasification furnace
Passage tube valve injects the gas of certain pressure by gas injection pipeline or gas exhaust piping into gasification furnace, monitors in gasification furnace
The leakage situation and gas pressure changing of pressure, while infusing exhaust closed section of wall surface of drilled tunnel in floor rock lane and smearing
Air-leakage test liquid, such as discovery detection liquid bubble, then illustrate that this closed section has gas leakage point, needs again to the note
Closed section of drilled tunnel of exhaust carries out closed work；If not finding liquid bubble, and the furnace pressure that gasifies is stablized, pressure-bearing situation
Preferably, leak rate is within zone of reasonableness, then it is assumed that the closed work is qualified, during gasifier operation, close to note row
Above closed section of pneumatic drill hole path of floor rock tunnel wall surface, suspension CO detector, the concentration of real-time monitoring CO gas,
And alarm, if CO concentration is continued above a certain concentration, exclude CO concentration caused by other factors it is raised on the basis of,
Can conclude that it is that CO concentration caused by being leaked due to the closed section of gas is increased, need to carry out gasification furnace to suspend gasifying agent injection,
The operation that rests processing, and take certain means to this closed section progress grouting and reinforcing, enhance air-tightness, in the feelings met the requirements
Under condition, restore to inject the gasifying agent of underground gasification furnace, resume operation coal underground gasifying furnace.
3. exhaust drilled tunnel heat insulating and sealing method for blocking is infused according to a kind of coal underground gasifying furnace described in claim 1, it is special
Sign is: the gas injection drilled tunnel or exhaust drilled tunnel are divided into II sections of drilled tunnels of I sections of drilled tunnels of Φ and Φ, have not
Same internal diameter, wherein the interior diameter of Φ I sections of drilled tunnels is greater than gas injection pipeline or gas exhaust piping diameter 0.5m~1.0m, length
Degree is 3~5m, and the interior diameter of II sections of drilled tunnels of Φ is greater than the interior diameter 0.5m~1.0m of I sections of drilled tunnels of Φ, length
For 3~5m, the diameter for separating casing I is greater than gas injection pipeline or gas exhaust piping diameter 0.4m~0.8m, casing length and the section
It is identical to seal drilled tunnel length；The diameter for separating casing II is greater than the diameter 0.4m~0.8m for separating casing I, casing length
It is identical as section sealing drilled tunnel length, separate casing I and separates casing II outside wall surface ring week arrangement at a certain distance
One set isolation casing I supporting block and separate casing II supporting block, be arc steel stabilizer blade, one group be 4 pieces, highly for 5cm~
15cm, high-strength high temperature-resistant material be filled in separate sleeve outer wall and gas injection drilled tunnel or exhaust drilled tunnel inner wall it
Between hole filler, tolerable temperature range be room temperature~600 DEG C, high temperature resistant cement be filling with separation inside pipe casing
Filler has the characteristics that high temperature resistant, intensity are high, can effectively completely cut off the heat of high-temperature gas in note exhaust passage pipeline, temperature
Degree monitoring system includes being distributed in separate the temperature thermocouple in inside pipe casing filler and the temperature in floor rock lane
Monitoring device can monitor the temperature value on the outside of gas injection pipeline or gas exhaust piping.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096337A (en) * | 2020-09-25 | 2020-12-18 | 山东科技大学 | Gas injection pipeline moving sealing system and method for underground coal gasification |
| CN112177559A (en) * | 2020-10-13 | 2021-01-05 | 中国矿业大学 | Novel underground coal gasification drilling process leakage plugging device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201381852Y (en) * | 2009-03-04 | 2010-01-13 | 李文军 | Measuring device for temperature in underground coal gasification drill holes |
| CN101881149A (en) * | 2010-06-17 | 2010-11-10 | 山西潞安环保能源开发股份有限公司 | Heat injection drilling and sealing method of heating coalbed |
| CN104131780A (en) * | 2014-06-26 | 2014-11-05 | 新奥气化采煤有限公司 | Method for preventing well water leakage and well structure |
| CN104265242A (en) * | 2014-08-09 | 2015-01-07 | 周成杰 | Terrestrial heat extraction method of geothermal well |
| CN104563874A (en) * | 2014-12-24 | 2015-04-29 | 新奥气化采煤有限公司 | Underground gasification well cementing method and well structure |
| CN105507939A (en) * | 2015-12-29 | 2016-04-20 | 中国矿业大学 | Grouting displacement type borehole curing sealing and pipeless gas extraction method |
| CN107120070A (en) * | 2017-06-15 | 2017-09-01 | 新疆国利衡清洁能源科技有限公司 | Drilling structure and construction method thereof |
| CN107366505A (en) * | 2017-05-27 | 2017-11-21 | 中核通辽铀业有限责任公司 | A kind of ground-dipping uranium extraction Novel drilling construction method |
| CN107387055A (en) * | 2017-09-18 | 2017-11-24 | 山东科技大学 | A kind of mobile gas injection device and method suitable for underground coal gasification(UCG) |
| CN107605454A (en) * | 2017-08-28 | 2018-01-19 | 新疆国利衡清洁能源科技有限公司 | Go out gas drilling hole and go out the method for gas drilling hole conveying coal gas |
| CN107939370A (en) * | 2017-12-11 | 2018-04-20 | 山东科技大学 | A kind of strip-type underground coal gasification system and production method |
| CN108915648A (en) * | 2018-06-29 | 2018-11-30 | 徐州工程学院 | A kind of encapsulating method suitable for high temperature nitrogen injection coal bed drilling |
-
2019
- 2019-06-19 CN CN201910531979.8A patent/CN110219636B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201381852Y (en) * | 2009-03-04 | 2010-01-13 | 李文军 | Measuring device for temperature in underground coal gasification drill holes |
| CN101881149A (en) * | 2010-06-17 | 2010-11-10 | 山西潞安环保能源开发股份有限公司 | Heat injection drilling and sealing method of heating coalbed |
| CN104131780A (en) * | 2014-06-26 | 2014-11-05 | 新奥气化采煤有限公司 | Method for preventing well water leakage and well structure |
| CN104265242A (en) * | 2014-08-09 | 2015-01-07 | 周成杰 | Terrestrial heat extraction method of geothermal well |
| CN104563874A (en) * | 2014-12-24 | 2015-04-29 | 新奥气化采煤有限公司 | Underground gasification well cementing method and well structure |
| CN105507939A (en) * | 2015-12-29 | 2016-04-20 | 中国矿业大学 | Grouting displacement type borehole curing sealing and pipeless gas extraction method |
| CN107366505A (en) * | 2017-05-27 | 2017-11-21 | 中核通辽铀业有限责任公司 | A kind of ground-dipping uranium extraction Novel drilling construction method |
| CN107120070A (en) * | 2017-06-15 | 2017-09-01 | 新疆国利衡清洁能源科技有限公司 | Drilling structure and construction method thereof |
| CN107605454A (en) * | 2017-08-28 | 2018-01-19 | 新疆国利衡清洁能源科技有限公司 | Go out gas drilling hole and go out the method for gas drilling hole conveying coal gas |
| CN107387055A (en) * | 2017-09-18 | 2017-11-24 | 山东科技大学 | A kind of mobile gas injection device and method suitable for underground coal gasification(UCG) |
| CN107939370A (en) * | 2017-12-11 | 2018-04-20 | 山东科技大学 | A kind of strip-type underground coal gasification system and production method |
| CN108915648A (en) * | 2018-06-29 | 2018-11-30 | 徐州工程学院 | A kind of encapsulating method suitable for high temperature nitrogen injection coal bed drilling |
Non-Patent Citations (3)
| Title |
|---|
| 任青山 等: "高水膨胀材料注浆工艺在瓦斯抽放钻孔密封中的应用", 《煤炭技术》 * |
| 程卫民 等: "综放采空区瓦斯与遗煤自燃耦合灾害危险区域重建技术", 《煤炭学报》 * |
| 黄温钢 等: "华亭煤空气、富氧及纯氧地下气化特性研究", 《煤质技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096337A (en) * | 2020-09-25 | 2020-12-18 | 山东科技大学 | Gas injection pipeline moving sealing system and method for underground coal gasification |
| CN112177559A (en) * | 2020-10-13 | 2021-01-05 | 中国矿业大学 | Novel underground coal gasification drilling process leakage plugging device |
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