CN207245693U - Underground coal gasification(UCG) igniter - Google Patents
Underground coal gasification(UCG) igniter Download PDFInfo
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- CN207245693U CN207245693U CN201721216070.6U CN201721216070U CN207245693U CN 207245693 U CN207245693 U CN 207245693U CN 201721216070 U CN201721216070 U CN 201721216070U CN 207245693 U CN207245693 U CN 207245693U
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Abstract
The utility model provides a kind of underground coal gasification(UCG) igniter, which includes：Delivery pipe；Wherein, delivery pipe is used to be placed in into the well cementing casing pipe of gas drilling hole, and the first end of delivery pipe is connected with ground, and the second end of delivery pipe is suspended in coal seam, and delivery pipe is used to convey pyrophoric gas into coal seam；Gap between delivery pipe and well cementing casing pipe forms annular space, and the first end of annular space is blind end, and for open end and corresponding at coal seam, annular space is used to convey combustion-supporting gas into coal seam second end；Pyrophoric gas is used for after being mixed with combustion-supporting gas spontaneous combustion to light coal seam.In the utility model, can it is more convenient, quickly light coal seam, it is easy to implement, and, hot-air or oxygen need not be wasted, so that coal combustion can ensure the igniting in coal seam exactly, be especially adapted for use in no-shaft underground gasification stove easy to control, it ensure that the progress of follow-up coal gasification reaction, meanwhile it is simple in structure, it is convenient to carry out.
Description
Technical field
Coal underground gasification technology field is the utility model is related to, is lighted a fire in particular to a kind of underground coal gasification(UCG)
Device.
Background technology
Underground coal gasification(UCG) is exactly that the coal in underground is carried out controlled burning, by the pyrolysis to coal with
And chemical action and produce the process of fuel gas.Realize that underground coal gasification(UCG) first will light the coal seam of underground, will
The very high coal of underground water content, the coal even soaked for a long time are lighted, and are a key technologies of gasifying underground coal.
Underground coal gasification(UCG) mainly has two kinds of techniques：No-shaft underground gasification and there is shaft underground gasification.There is well formula underground
Gasification is by artificial development work, and underground gasification furnace is arranged in coal seam, and people can be following into coal seam, is gasification in coal seam
Do sufficient preparation.And no-shaft UCG is to be got to by drilling in coal seam, the then igniting gasification in coal seam.Due to two
Kind technique is different, so the requirement to firing technique is also different, there is the igniting of shaft underground gasification stove, since people following can arrive coal
In layer, Ignition Facility is got out in coal seam, so igniting is easier.And the igniting of no-shaft underground gasification stove then relatively will
It is much more difficult.
Existing firing technique has：Ignition, acetylene igniting, the igniting of normal bright lamp, plasma ignition, coke igniting,
Fuel wood igniting etc..Wherein, ignition is that the spark produced using sparking is lighted fuel gas, it is necessary to point of observation fire behavior
Condition, however, the igniting of no-shaft underground gasification stove carries out in the invisible case, then ignition igniting can not be accurate
The situation of sparking is really grasped, if igniting is not in time, be easy to cause detonation.Acetylene igniting is that acetylene is lighted with naked light, then point
The acetylene of combustion, which is sent to, to be waited to light place, is then sent oil and then is realized igniting.However, the acetylene lighted is difficult to be transported to no well formula underground
In gasification furnace.Normal bright lamp igniting refers to put Chang Minghuo at position to be fired, once there is fuel gas out will be by Chang Ming
Fire is lighted, but places Chang Minghuo in no-shaft underground gasification stove, is not easy to realize.Plasma ignition is to utilize DC current
(280--350A) contacting ignition arc under conditions of medium air pressure 0.01-0.03Mpa, and firm power is obtained under high-intensity magnetic field
Direct current air plasma, the gradient which forms T ＞ 5000K in the primary combustion cylinder of burner are greatly local
High-temperature region, pulverized coal particle is subject to high temperature action by the plasma " fiery core ", and discharges volatile matter rapidly in several seconds, and makes
Pulverized coal particle rupture crushes, so as to burn rapidly.However, the equipment of plasma ignition is complex, cost of investment is higher.Fuel wood
Igniting and coke igniting are applied to have shaft underground gasification stove, fuel wood and coke are positioned over to position to be fired, for nothing
For shaft underground gasification stove, since subsurface picture is invisible, so fuel wood and coke are difficult to be transported to position to be fired.Cause
This, above-mentioned existing sparking mode is not suitable for no-shaft underground gasification stove.
Existing patent CN200810119353.8, a kind of entitled coal underground forced oxidation and ignition mode.It is of the invention public
Opened the characteristic using spontaneous combustionof coal, it is believed that carry out pressure oxidation, light coal seam, realize the igniting of underground gasification, including row
Water, heating and ignition process.The method that draining uses pressure drainage, after multiple drain operation, starts air heating dress
Put, then pass to oxygen and strengthen coal combustion.Reinforcing ignition process is forced to include hot air forced oxidation and oxygen forced oxidation,
When calorific value of gas reaches 4.0MJ/Nm3When, it is believed that forced oxidation and ignition success, into follow-up gasification.
However, the coal underground forced oxidation and ignition mode in above-mentioned patent, hot-air is passed through into coal seam and oxygen is strong
Oxygenerating, so that calorific value of gas reaches preset value to judge to light a fire successfully, this method needs to waste substantial amounts of hot-air and oxygen
Gas, also, calorific value of gas is difficult to control, and can not accurately determine whether igniting succeeds, and then follow-up gasified reverse can not be carried out
Should.
Utility model content
In consideration of it, the utility model proposes a kind of underground coal gasification(UCG) igniter, it is intended to solves of the prior art
Sparking mode is not particularly suited for the problem of no-shaft underground gasification stove.
The utility model proposes a kind of underground coal gasification(UCG) igniter, which includes：Delivery pipe；Wherein, convey
Pipe is used to be placed in into the well cementing casing pipe of gas drilling hole, and the first end of delivery pipe is connected with ground, the second end suspension of delivery pipe
In coal seam, delivery pipe is used to convey pyrophoric gas into coal seam；Gap between delivery pipe and well cementing casing pipe forms annular sky
Between, the first end of annular space is blind end, and for open end and corresponding at coal seam, annular space is used for into coal seam second end
Convey combustion-supporting gas；Pyrophoric gas is used for after being mixed with combustion-supporting gas spontaneous combustion to light coal seam.
Further, in above-mentioned underground coal gasification(UCG) igniter, delivery pipe is additionally operable to convey heat production gas into coal seam,
Heat production gas is mixed with pyrophoric gas.
Further, above-mentioned underground coal gasification(UCG) igniter further includes：Nozzle carrier and at least one nozzle；Wherein, spray
Mouth seat is connected with the second end of delivery pipe, and nozzle carrier offers at least one jet port, and each nozzle and each jet port one are a pair of
It should connect.
Further, in above-mentioned underground coal gasification(UCG) igniter, the second end of nozzle carrier and delivery pipe is detachably connected.
Further, in above-mentioned underground coal gasification(UCG) igniter, each nozzle is detachably connected with corresponding jet port.
Further, in above-mentioned underground coal gasification(UCG) igniter, each jet port is uniformly distributed along the circumferential direction of nozzle carrier.
Further, in above-mentioned underground coal gasification(UCG) igniter, first end and the ground of delivery pipe are detachably connected.
Further, above-mentioned underground coal gasification(UCG) igniter further includes：Attachment device；Wherein, attachment device is arranged at
Between delivery pipe and well cementing casing pipe, attachment device is used for the first end for blocking annular space；Attachment device, which offers, to be used for ring
The gas input port of combustion-supporting gas is conveyed in shape space.
Further, above-mentioned underground coal gasification(UCG) igniter further includes：Seal；Wherein, seal is arranged at annular
In space and it is placed in the lower section of attachment device.
In the utility model, pyrophoric gas is conveyed into coal seam by delivery pipe, is conveyed by annular space into coal seam
Combustion-supporting gas, using pyrophoric gas and the mixed spontaneous combustion of combustion-supporting gas and then lights coal seam, being capable of more convenient, quick place
Coal-fired layer, it is easy to implement, also, hot-air or oxygen need not be wasted so that coal combustion, can be true exactly easy to control
The igniting in coal seam is protected, no-shaft underground gasification stove is especially adapted for use in, solves sparking mode of the prior art and do not apply to
In the no-shaft underground gasification stove the problem of, it is ensured that the progress of follow-up coal gasification reaction, meanwhile, it is simple in structure, it is convenient to carry out.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to this practicality
New limitation.And in whole attached drawing, identical component is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the structure diagram for the underground coal gasification(UCG) igniter that the utility model embodiment provides；
Fig. 2 is structure diagram of the underground coal gasification(UCG) igniter of the utility model embodiment offer in coal seam；
Fig. 3 is the partial enlarged view at A in Fig. 1；
Fig. 4 is the overlooking the structure diagram for the underground coal gasification(UCG) igniter that the utility model embodiment provides.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.It should be noted that in the case where there is no conflict, the implementation in the utility model
Feature in example and embodiment can be mutually combined.It is below with reference to the accompanying drawings and in conjunction with the embodiments new to describe this practicality in detail
Type.
It should be appreciated by those skilled in the art that coal underground gasification technology includes：Into gas drilling hole, to go out gas drilling hole gentleization logical
Road, wherein, air inlet drilling is used to convey gasifying agent into coal seam, and gasification reaction life occurs in gasification tunnel with coal seam for gasifying agent
Into coal gas of high temperature, coal gas of high temperature is expelled to ground by going out gas drilling hole.Specifically, into being typically provided with well cementation set in gas drilling hole
Pipe, well cementing casing pipe are used to, to carrying out supporting into gas drilling hole, play the role of to reinforcing into gas drilling hole.Go out in gas drilling hole and also can
Well cementing casing pipe is provided with, well cementing casing pipe carries out support reinforcement to going out gas drilling hole.In the specific implementation, it is in coal seam into gas drilling hole
Open-hole, in order to which the gasifying agent conveyed into gas drilling hole preferably carries out gasification reaction with coal seam.
Referring to Fig. 1 and Fig. 2, the excellent of the underground coal gasification(UCG) igniter that the utility model embodiment provides is shown in figure
Select structure.As shown in the figure, underground coal gasification(UCG) igniter can include：Delivery pipe 1.Wherein, delivery pipe 1 be used for be arranged at into
In the well cementing casing pipe 2 of gas drilling hole, the first end (upper end shown in Fig. 1) of delivery pipe 1 is connected with ground 7, and the second of delivery pipe 1
It is free end to hold (lower end shown in Fig. 1), also, the second end of delivery pipe 1 is suspended in coal seam 8, and delivery pipe 1 is used for coal seam
Pyrophoric gas is conveyed in 8.Specifically, the second end of delivery pipe 1 is placed in the position to be fired in coal seam 8.Wherein, pyrophoric gas can be with
For silane or diborane, it is of course also possible to be other pyrophoric gases, the present embodiment is not intended to be limited in any this.
When it is implemented, the second end or delivery pipe 1 of delivery pipe 1 are heat safe close to the material of the part of second end
Stainless steel or steel alloy.In the present embodiment, material of the delivery pipe 1 apart from the part of second end 10-15m is heat safe stainless
Steel or steel alloy.The remainder of delivery pipe 1 can be the petroleum casing pipe of standard.
The first end of delivery pipe 1 can be to be fixedly connected with ground 7, so that delivery pipe 1 keeps stable state, it is ensured that defeated
Send the steady operation of pipe 1.When it is implemented, this is fixedly connected with mode can determine that the present embodiment is to this according to actual conditions
It is not intended to be limited in any.Certainly, the first end of delivery pipe 1 can also be detachably connected with ground 7, on the one hand, be enabled to defeated
Pipe 1 is sent to keep stable state, on the other hand, delivery pipe 1 can be disassembled according to actual conditions, easy to reuse, section
About resource.Preferably, the first end of delivery pipe 1 is to be detachably connected with ground 7.
Delivery pipe 1 be in vacant state in the well cementing casing pipe 2, i.e. delivery pipe 1 is not contacted with well cementing casing pipe 2, then delivery pipe 1 and
There is prepsetting gap, which can determine that the present embodiment does not appoint this according to actual conditions between well cementing casing pipe 2
What is limited.Prepsetting gap between delivery pipe 1 and well cementing casing pipe 2 forms an annular space 3, the first end of the annular space 3
(upper end shown in Fig. 1) is blind end, and the second end (lower end shown in Fig. 1) of annular space 3 is open end and is free end.Tool
Body, the first end of annular space 3 are that the implementation of blind end can be：Set between delivery pipe 1 and well cementing casing pipe 2 close
Seal apparatus, seals the first end of annular space 3 by sealing device；Alternatively, the first end in delivery pipe 1 sets covering
Device, the covering device are used for the first end for covering annular space 3, certainly, it is not limited to this, as long as annular sky can be realized
Between 3 first end sealing, the present embodiment do not do this any restrictions.
The second end of annular space 3 corresponds at coal seam 8, and annular space 3 is used to convey combustion-supporting gas into coal seam 8.Tool
Body, the first end of annular space 3 can be provided with gas input port 4, and gas input port 4 is used to convey into annular space 3
Combustion-supporting gas.The second end of annular space 3 is used to combustion-supporting gas being delivered in coal seam 8.Wherein, combustion-supporting gas can be air
Or oxygen.
Pyrophoric gas is used to spontaneous combustion and then light coal seam 8 after mix with combustion-supporting gas, specifically, using pyrophoric gas oneself
Body characteristic carries out spontaneous combustion after being mixed with combustion-supporting gas, so as to fulfill igniting, and then lights coal seam 8.
When it is implemented, the pressure limit of pyrophoric gas is 0.05MPa~6MPa, the pressure limit of combustion-supporting gas is
0.05MPa~15MPa.
When it is implemented, on ground 7, the first end of delivery pipe 1 can be stored up by pyrophoric gas pipeline and pyrophoric gas
Gas cylinder is connected, and pyrophoric gas gas bomb is used to store pyrophoric gas, and conveys spontaneous combustion to delivery pipe 1 by pyrophoric gas pipeline
Gas.It can be provided with pyrophoric gas pipeline for controlling pyrophoric gas valve that whether pyrophoric gas convey, for supervising
Survey the pressure gauge of pyrophoric gas pressure and the flowmeter for monitoring pyrophoric gas flow.
When it is implemented, gas input port 4 can be connected by combustion gas duct with combustion-supporting gas gas bomb.It is combustion-supporting
Gas gas bomb is used to store combustion-supporting gas, and conveys combustion-supporting gas into annular space 3 by combustion gas duct.Combustion-supporting
It can be provided with gas pipeline for controlling combustion-supporting gas valve that whether combustion-supporting gas convey, for monitoring combustion-supporting gas pressure
The pressure gauge of power and the flowmeter for monitoring combustion-supporting gas flow.
When it is implemented, the first end of delivery pipe 1 can extend out to ground more than 7, then a part for delivery pipe 1 is placed in ground
Face more than 7.Delivery pipe 1 can offer the first opening 11 close to the side wall of first end, then the first opening 11 is arranged at delivery pipe 1
It is placed in the side wall of 7 above section of ground.First opening 11 can be connected by nitrogen pipeline with nitrogen gas bomb.Nitrogen storage
Gas cylinder is used to store nitrogen, and by nitrogen pipeline to 1 supplying nitrogen of delivery pipe.By nitrogen to remaining oxygen in delivery pipe 1
Either air into line replacement burning in delivery pipe 1 to avoid pyrophoric gas and oxygen or air, causes delivery pipe 1 to gas
Damage.It can be provided with nitrogen pipeline for controlling nitrogen valve that whether nitrogen convey, for monitoring nitrogen pressure
Pressure gauge and the flowmeter for monitoring nitrogen flow.
When it is implemented, the bottom (lower end shown in Fig. 1) of well cementing casing pipe 2 is placed in coal seam 8, then the second of delivery pipe 1
End is placed slightly at the lower part of well cementing casing pipe 2 so that the pyrophoric gas energy that the combustion-supporting gas and delivery pipe 1 that annular space 3 conveys convey
Enough second ends in delivery pipe 1 are mixed, to ensure that coal seam is preferably lighted in spontaneous combustion after combustion-supporting gas and pyrophoric gas mixing
8, avoid the second end of delivery pipe 1 and the bottom of well cementing casing pipe 2 from differing more and cause combustion-supporting gas and pyrophoric gas not in coal seam 8
Place carries out mixing spontaneous combustion.
When it is implemented, since delivery pipe 1 is worn into coal seam 8 by ground 7, so the length of delivery pipe is longer.Having
Body can be connected through a screw thread or the company of welding between two neighboring branch section in use, can divide delivery pipe 1 for branched section
Connect.
Ignition process is：The second end of delivery pipe 1 is placed in the position to be fired in coal seam 8.Nitrogen valve is opened, is blown with nitrogen
Delivery pipe 1 is swept, passes through remaining oxygen or air in nitrogen displacement delivery pipe 1.When nitrogen intake full of delivery pipe 1 or
When person is more than the volume of delivery pipe 1, nitrogen is closed, while open pyrophoric gas valve and combustion-supporting gas valve.Pyrophoric gas by
Delivery pipe 1 is delivered in coal seam 8, and combustion-supporting gas is delivered in coal seam 8 by annular space 3, and pyrophoric gas exists with combustion-supporting gas
Spontaneous combustion after being mixed at coal seam 8, forms the flame of 20-50cm.Coal seam 8 is dried using flame, and reaches 8 temperature of coal seam
It is fiery, and then coal seam 8 of igniting.
When it is implemented, combustion-supporting gas is oxygen or air.The flue gas that coal seam 8 produces after lighting can be by going out gas drilling hole
Discharge.Sampler can be provided with by going out in gas drilling hole, sampler is used to collect the flue gas.Sampler can with ground 7
Gas analyzing apparatus be connected, gas analyzing apparatus is used for the flue gas for receiving sampler conveying, and flue gas is analyzed,
Oxygen content in flue gas judges whether subterranean coal 8 is ignited.When the oxygen content in flue gas gradually reduces, also, hydrogen
Gas, carbon monoxide, methane show to light a fire successfully when active principle continues to increase.In Initial Stage after Ignition, oxygen content is relatively low, can
To increase the quantity delivered of oxygen, in this way, can judge the combustion case in coal seam 8 by the consumption of oxygen.
When it is implemented, when the first end of delivery pipe 1 is to be detachably connected with ground 7, behind coal seam 8 of igniting, can incite somebody to action
Delivery pipe 1 is reused from into taking out in gas drilling hole.
As can be seen that in the present embodiment, pyrophoric gas is conveyed into coal seam 8 by delivery pipe 1, by annular space 3 to
Combustion-supporting gas is conveyed in coal seam 8, using pyrophoric gas and the mixed spontaneous combustion of combustion-supporting gas and then lights coal seam 8, can be more
Coal seam 8 is quickly and easily lighted, it is easy to implement, also, hot-air or oxygen need not be wasted so that the burning of coal seam 8 is easy to control
System, can ensure the igniting in coal seam 8 exactly, be especially adapted for use in no-shaft underground gasification stove, solve of the prior art
Sparking mode is not particularly suited for the problem of no-shaft underground gasification stove, it is ensured that the progress of follow-up coal gasification reaction, meanwhile, structure
Simply, it is convenient to carry out.
With continued reference to Fig. 1 and Fig. 2, in above-described embodiment, delivery pipe 1 is additionally operable to convey heat production gas, heat production into coal seam 8
Gas is mixed with pyrophoric gas, to form mixed gas.Spontaneous combustion after mixed gas is mixed with combustion-supporting gas again, and then the coal that ignites
Layer 8.Specifically, pyrophoric gas can be mixed with heat production gas in delivery pipe 1, and the mixed gas of formation is by delivery pipe 1
Second end be delivered in coal seam 8.Heat production gas is used for the calorific value for improving pyrophoric gas, to accelerate the speed that coal seam 8 is lighted.Its
In, heat production gas can be one or more of mixed gas in liquefied petroleum gas, natural gas, paraffin gas.Paraffin gas
Can be methane, ethane, propane etc..
When pyrophoric gas is silane or diborane, the calorific value ratio of silane and diborane is relatively low, individually only with silane or
Self-ignition point fire coal layer 8 is more difficult after person's diborane is mixed with oxygen or air, and the required time is longer, therefore, by heat production
Either diborane is mixed to improve the calorific value of silane or diborane gas with silane, and then rapidly lights coal seam 8.
When it is implemented, the pressure limit of heat production gas is 0.02MPa~0.5MPa, pyrophoric gas is mixed with heat production gas
The concentration for closing pyrophoric gas in gas is 1%~50%, and the concentration of heat production gas is 50%~99%.Combustion-supporting gas and gaseous mixture
The ratio of body is more than 10.
When it is implemented, the second opening 12 can be offered close to the side wall of first end in delivery pipe 1, then the second opening 12
It is arranged at the side wall that delivery pipe 1 is placed in 7 above section of ground.Second opening 12 can pass through heat production gas pipeline and heat production gas
Body gas bomb is connected.Heat production gas gas bomb is used to store heat production gas, and is conveyed by heat production gas pipeline to delivery pipe 1
Heat production gas.It can be provided with heat production gas pipeline for controlling heat production gas valve that whether heat production gas convey, using
Pressure gauge in monitoring heat production gas pressure and flowmeter for monitoring heat production gas flow.
As can be seen that in the present embodiment, heat production gas is conveyed into coal seam 8 by delivery pipe 1 so that heat production gas with from
Combustion gas body is mixed, and mixed mixed gas carries out mixing spontaneous combustion again with combustion-supporting gas, and then lights coal seam 8, heat production gas
Body can effectively improve the calorific value of pyrophoric gas, accelerate lighting for coal seam 8, improve the efficiency of igniting.
Referring to Fig. 3 and Fig. 4, the preferred structure of nozzle carrier in underground coal gasification(UCG) igniter is shown in figure.As schemed
Show, in the various embodiments described above, underground coal gasification(UCG) igniter can also include：Nozzle carrier 5 and at least one nozzle 6.Wherein,
Nozzle carrier 5 is connected with the second end of delivery pipe 1, and specifically, nozzle carrier 5 can be fixedly connected with delivery pipe 1, such as：Welding
Connection etc.；Certainly, nozzle carrier 5 can also be detachably connected with the second end of delivery pipe 1, such as：Be threadedly coupled etc., the present embodiment
This is not intended to be limited in any.Preferably, the second end of nozzle carrier 5 and delivery pipe 1 is to be detachably connected.
Nozzle carrier 5 offers at least one jet port, and each nozzle 6 is to connect one to one with each jet port.Specifically, spray
The quantity of mouth 6 is identical with the quantity of jet port and corresponds.Each nozzle 6 is connected with corresponding jet port, the connection
Mode can be to be fixedly connected, such as：It is welded to connect；It is of course also possible to be detachably connected, such as：Be threadedly coupled etc., this implementation
Example is not intended to be limited in any this.Preferably, each nozzle 6 is detachably connected with corresponding jet port.In the present embodiment, spray
Loophole is 4, and nozzle 6 is also 4, and each nozzle 6 is corresponded with each jet port and set.
Preferably, each jet port is uniformly distributed along the circumferential direction of nozzle carrier 5, i.e., each nozzle 6 along nozzle carrier 5 it is circumferential uniformly
Distribution, so that the mixed gas of the pyrophoric gas or pyrophoric gas and heat production gas in delivery pipe 1 is equably delivered to coal seam 8
In.
When it is implemented, the material of nozzle carrier 5 and nozzle 6 is high temperature resistant stainless steel or steel alloy.
Preferably, nozzle carrier 5 and the second end of delivery pipe 1 are detachably connected；And/or each nozzle 6 and corresponding injection
Mouth is detachably connected.Nozzle carrier 5 and the second end of delivery pipe 1 are detachably connected, and enable to nozzle carrier 5 can be by delivery pipe 1
Second end disassembles, easy to the replacement of nozzle carrier 5, and it is possible to adjust pyrophoric gas or spontaneous combustion according to actual conditions
The spray mode of the mixed gas of gas and heat production gas.Each nozzle 6 is detachably connected with corresponding jet port, is enabled to
Each nozzle 6 is easy to disassemble, and then easy to the replacement of nozzle 6.
As can be seen that in the present embodiment, by setting nozzle carrier 5 and nozzle 6, enable in delivery pipe 1 from combustion gas
The mixed gas of body or pyrophoric gas and heat production gas is more uniformly sprayed in coal seam 8, easy to lighting for coal seam 8, also,
It is simple in structure, it is easy to implement.
Referring to Fig. 1 and Fig. 2, in the various embodiments described above, the first end of annular space 3 has much for the implementation of blind end
Kind, one kind therein is only introduced in the present embodiment, but is not limited to such a mode.Underground coal gasification(UCG) igniter may be used also
With including：Attachment device.Wherein, attachment device is arranged between delivery pipe 1 and well cementing casing pipe 2, and specifically, attachment device corresponds to
In annular space 3, also, attachment device is arranged between the first end of delivery pipe 1 and well cementing casing pipe 2, i.e., attachment device is set
In the first end of annular space 3, attachment device is used for the first end for blocking annular space 3.
When it is implemented, attachment device can be the connecting plate of annular, which corresponds to the first of annular space 3
End, also, the inner wall of connecting plate is connected with the outer wall of delivery pipe 1, and the outer wall of connecting plate can be clamped with 2 phase of well cementing casing pipe,
In this way, when first end and the ground 7 of delivery pipe 1 are detachably connected, connecting plate can be made to follow under delivery pipe 1 dismantles together
Come.
Attachment device offers gas input port 4, which is used to convey combustion-supporting gas into annular space 3.
When connecting plate of the attachment device for annular, gas input port 4 is opened in the connecting plate.
As can be seen that in the present embodiment, the first end of annular space 3 is sealed by attachment device, it is simple in structure,
It is easy to implement.
In above-described embodiment, underground coal gasification(UCG) igniter can also include：Seal.Wherein, seal is arranged at
In annular space 3, also, seal is placed in the lower part of attachment device.Seal can be sealing ring.In this way, pass through seal
Effectively the first end of annular space 3 can be sealed, to ensure that combustion-supporting gas is successfully delivered in coal seam 8.
In conclusion in the present embodiment, coal seam 8 can more convenient, be quickly lighted, it is easy to implement, also, without wave
Take hot-air or oxygen so that the burning of coal seam 8 can ensure the igniting in coal seam 8 exactly, be especially adapted for use in easy to control
No-shaft underground gasification stove, it is ensured that the progress of follow-up coal gasification reaction, meanwhile, it is simple in structure, it is convenient to carry out.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
New spirit and scope.If in this way, these modifications and variations of the utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these modification and variations.
Claims (9)
- A kind of 1. underground coal gasification(UCG) igniter, it is characterised in that including：Delivery pipe (1)；Wherein, the delivery pipe (1) is used In being placed in into the well cementing casing pipe (2) of gas drilling hole, the first end of the delivery pipe (1) is connected with ground (7), the delivery pipe (1) second end is suspended in coal seam (8), and the delivery pipe (1) is used for the conveying pyrophoric gas in the coal seam (8)；Gap between the delivery pipe (1) and the well cementing casing pipe (2) forms annular space (3), the annular space (3) First end is blind end, and second end is open end and corresponds to the coal seam (8) place, and the annular space (3) is used for described Conveying combustion-supporting gas in coal seam (8)；The pyrophoric gas is used for after being mixed with the combustion-supporting gas spontaneous combustion to light the coal seam (8).
- 2. underground coal gasification(UCG) igniter according to claim 1, it is characterised in that the delivery pipe (1) is additionally operable to Conveying heat production gas, the heat production gas are mixed with the pyrophoric gas in the coal seam (8).
- 3. underground coal gasification(UCG) igniter according to claim 1, it is characterised in that further include：Nozzle carrier (5) and extremely A few nozzle (6)；Wherein,The nozzle carrier (5) is connected with the second end of the delivery pipe (1), and the nozzle carrier (5) offers at least one spray Loophole, each nozzle (6) connect one to one with each jet port.
- 4. underground coal gasification(UCG) igniter according to claim 3, it is characterised in that the nozzle carrier (5) with it is described The second end of delivery pipe (1) is detachably connected.
- 5. underground coal gasification(UCG) igniter according to claim 3, it is characterised in that each nozzle (6) with it is right The jet port answered is detachably connected.
- 6. underground coal gasification(UCG) igniter according to claim 3, it is characterised in that each jet port is along the spray The circumferential direction of mouth seat (5) is uniformly distributed.
- 7. underground coal gasification(UCG) igniter according to claim 1, it is characterised in that the first of the delivery pipe (1) End is detachably connected with ground (7).
- 8. underground coal gasification(UCG) igniter according to claim 1, it is characterised in that further include：Attachment device；Its In,The attachment device is arranged between the delivery pipe (1) and the well cementing casing pipe (2), and the attachment device is used to block The first end of the annular space (3)；The attachment device offers the gas input port (4) for the conveying combustion-supporting gas into the annular space (3).
- 9. underground coal gasification(UCG) igniter according to claim 8, it is characterised in that further include：Seal；Wherein,The seal is arranged in the annular space (3) and is placed in the lower section of the attachment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721216070.6U CN207245693U (en) | 2017-09-20 | 2017-09-20 | Underground coal gasification(UCG) igniter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112761611A (en) * | 2020-12-07 | 2021-05-07 | 中国地质调查局油气资源调查中心 | Novel real-time coal gasification of underground coal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112761611A (en) * | 2020-12-07 | 2021-05-07 | 中国地质调查局油气资源调查中心 | Novel real-time coal gasification of underground coal device |
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