CN207144919U - Underground gasification furnace - Google Patents
Underground gasification furnace Download PDFInfo
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- CN207144919U CN207144919U CN201720901011.6U CN201720901011U CN207144919U CN 207144919 U CN207144919 U CN 207144919U CN 201720901011 U CN201720901011 U CN 201720901011U CN 207144919 U CN207144919 U CN 207144919U
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- stove
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- 238000002309 gasification Methods 0.000 title claims abstract description 83
- 239000003245 coal Substances 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 11
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002671 adjuvant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an underground gasification stove, it belongs to coal underground gasification exploitation technical field, combines U-shaped butt joint well technique to construct in a flexible way, corresponds a plurality of horizontal wells and the vertical shaft of giving vent to anger through an air inlet well, has built a restraint form multichannel underground gasification stove, has shortened the time of building the stove greatly, has practiced thrift the cost of building the stove. A plurality of gasification channels of different layers are constructed for coal seams of different thicknesses, the plurality of gasification channels only correspond to one gas inlet well, the gasification channels are arranged in a three-dimensional mode, and the gasification exploitation utilization rate of coal seam resources of different thicknesses is greatly improved. Use the utility model provides an underground gasification stove carries out coal underground gasification, can realize restrainting many gasification passageways of form and gasify simultaneously, has improved gasification efficiency.
Description
Technical field
It the utility model is related to underground coal gasification(UCG) production technique field, and in particular to a kind of underground gasification furnace.
Background technology
Underground coal gasification(UCG) is ignited by gasification tunnel of being constructed in the coal seam of underground preservation, and by passageway perimeter coal seam
And realize.Different according to the mode for preparing gasification tunnel, underground gasification mode is broadly divided into no well formula and has well formula at present.Its
In have shaft underground gasification, it is necessary to manually open up gasification tunnel, build stove cycle length, the work of unavoidable underground, have shadow to environment
Ring.For no-shaft underground gasification, it is necessary to which rig creeps into gasification tunnel, it is short to build the stove cycle, underground job is eliminated, to environment without public affairs
Evil.China and world wide underground gasification promote mainly the type of furnace with without based on well formula at present.
In order to be achieved effective control to the coal seam gasification process of various different occurrence conditions, it is necessary to for different coals
Layer occurrence condition, using different no-shaft UCG furnace structures.In decades, a variety of type of furnaces have been developed, it is gentle from inlet, outlet point
Change passage relative position be divided into them several basic type of furnaces, i.e. a line oven, V-arrangement stove, blind hole stove etc. so long to divide, in this several base
On the basis of this type of furnace, the U-shaped butt shaft underground gasification furnace approved in the industry at present had been invented again later.Above-mentioned is single stove
Type, such as Publication No. CN103603647A Chinese invention patent, it discloses a kind of underground gasification furnace, the air inlet being sequentially communicated
Passage, gasification tunnel, outlet passageway and pipeline therein is passed through, the first port of pipeline elevates above the soil, and second port is located at
In gasification tunnel；Second port is connected with deashing device, for removing the dust stratification for attachment of gasifying on subterranean coal rib.Thus may be used
See that the single type of furnace need to be repeated several times all kinds of drillings of construction and complete to build stove, while be difficult that the coal seam for meeting gasification different-thickness requires,
A gasification tunnel at least needs to match a bite inlet well in gasification, builds stove cycle length, and cost of investment is high.
Utility model content
The purpose of this utility model is that providing a kind of a plurality of different layers position gasification of the coal seam structure for different-thickness leads to
The underground gasification furnace in road.
To achieve these goals, the utility model provides following technical scheme：
A kind of underground gasification furnace, including：
One inlet well, it includes interconnected vertical section and inclination section, and well head is located on the vertical section, described to make
Oblique section is located at the lower section of the vertical section；
One is made cave, and it is connected with the end of the inclination section；
Multiple outlet straight wells, each outlet straight well are connected between cave with described make by an at least horizontal well.
Preferably, the curvature that is shaped as of the inclination section is positive recessed bent arc.
Preferably, the outlet straight well is three.
Preferably, each outlet straight well is connected between cave with described make by a horizontal well.
Preferably, the inclination section is located at the 5-7m of seat earth top.
Preferably, the volume for making cave is 5-8m3。
Preferably, when the horizontal well is three, the volume for making cave 3 is 5-8m3；
When the horizontal well is n, n ＞ 3, the volume for making cave 3 is 5-8m31.2n-3-1.3n-3Times.
Underground gasification furnace provided by the utility model, flexibly built with reference to U-shaped butt shaft technology, pass through an inlet well
Corresponding multiple horizontal wells and outlet straight well, have built a kind of pencil multichannel underground gasification furnace, substantially reduce and build stove time, section
About build stove cost.The gasification tunnel of a plurality of different layers position is built for the coal seam of different-thickness, a plurality of gasification tunnel is only corresponding
Utilization rate is exploited in a bite inlet well, three-dimensional arrangement gasification tunnel, the gasification for substantially increasing Seams with Different Thickness resource.Use
Underground gasification furnace provided by the utility model carries out underground coal gasification(UCG), and a plurality of gasification tunnel of pencil can be achieved and enter promoting the circulation of qi simultaneously
Change, improve gasification efficiency.
The beneficial effects of the utility model are as follows：
1st, multi-use, the utilization rate of Seams with Different Thickness resource is improved.The type of furnace can be directed to Seams with Different Thickness and build
Pencil gasification tunnel, by a point horizontally disposed gasification tunnel, the gasification exploitation for substantially increasing Seams with Different Thickness resource utilizes
Rate.
That the 2nd, reduces underground gasification furnace builds stove time and cost.By a U-shaped well straight well section and inclination section, can complete more
The structure of bar horizontal segment, building the stove time for underground gasification furnace is greatlyd save, meanwhile, greatly reduce and build stove cost.
3rd, realize that one enters to have more, gasify simultaneously.The catalyzed gas that one well is passed through is distributed to each gasification tunnel in underground, is in
Existing pencil multichannel while vaporized state.
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 described in the utility model
Some 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 floor map for the underground gasification furnace that the utility model embodiment provides；
Fig. 2 is the longitudinal schematic cross-sectional view for the underground gasification furnace that the utility model embodiment provides.
Description of reference numerals：
1st, inlet well vertical section；2nd, inlet well inclination section；3rd, cave is made；4th, horizontal well；5th, outlet straight well.
Embodiment
In order that those skilled in the art more fully understands the technical solution of the utility model, below in conjunction with accompanying drawing pair
The utility model is 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 gasification furnace, suitable for different-thickness coal seam carry out large area, stratification,
High efficiency gasifies, and the type of furnace fully combines the pencil multichannel underground gasification furnace of the flexible integration construct of U-shaped butt shaft technology, bag
Include inlet well, make cave 3, horizontal well 4 and outlet straight well 5.Wherein, inlet well is one, and the inlet well is vertical by what is be interconnected
Section 1 and inclination section 2 are formed, and well head is located on vertical section 1, and inclination section 2 is located at the lower section of vertical section 1, it is preferable that such as Fig. 2 institutes
To show, the curvature that is shaped as of inclination section 2 is positive recessed bent arc, and at the 5-7m of seat earth top.Vertical section 1 and deflecting
The hole diameter of section 2 is 1.5-2 times of current general hole diameter.The end that cave 3 is made with inclination section 2 is connected.Outlet straight well 5 to be multiple,
Its quantity depends on coal seam thickness, and each 5 whole well location of outlet straight well, which is put, also depends on coal seam thickness, and the quantity of horizontal well 4 is same
Sample depends on coal seam thickness.Each outlet straight well 5 is connected between cave 3 with making by an at least horizontal well 4, and horizontal well 4 is used as gas
Change passage.In the present embodiment, outlet straight well 5 is three, and horizontal well 4 is also three, and an outlet straight well 5 and making leads between cave 3
Cross a horizontal well 4 to be connected, such structure, the then volume for making cave 3 is 5-8m3.Seen with coal seam thickness common at present, set three
Outlet straight well 5 and three horizontal wells 4 can meet demand, and coal seam thickness often increases 15-20m, then vertical upper plus increase a water
Horizontal well 4.One horizontal well 4 of vertical upper increase can corresponding to a newly-increased outlet straight well 5 it is coupled, also can be by increased horizontal well 4
It is connected with existing outlet straight well 5, be i.e. the corresponding multiple horizontal wells 4 of an outlet straight well 5, so can further improve gasification effect
Rate.When horizontal well 4 is n, n ＞ 3, the volume for making cave 3 is 5-8m31.2n-3-1.3n-3Times, that is to say, that when there is three
During level above well 4, the volume in cave 3 is made with 5-8m3Based on, often increase a horizontal well 4, making the volume in cave 3 then increases to
1.2-1.3 times, for example, when horizontal well 4 is four, then the volume for making cave 3 is 5-8m31.2-1.3 times；When horizontal well 4 is
At five, then the volume for making cave 3 is 5-8m31.22-1.32Times, by that analogy, then when horizontal well 4 is n, n ＞ 3, make cave
3 volume is 5-8m31.2n-3-1.3n-3Times.
A kind of construction method of above-mentioned underground gasification furnace, it is comprised the following steps that：
A) vertical section 1 and inclination section 2 in inlet well are drilled out, wherein, inclination section 2 is constructed to seat earth top 5-7m
The hole diameter of place, vertical section 1 and inclination section 2 is 1.5-2 times of current general hole diameter, and successively vertical section 1 and inclination section 2 are carried out down
Sleeve pipe and well cementation；(construction operation that cement is injected to the annular space between well and sleeve pipe is referred to as cementing the well)
B) dug out in the end of inclination section 2 and make cave 3, form 5-8m3Space；
C) outlet straight well 5, conventional hole diameter are drilled out, and carries out setting of casing and well cementation；
D) according to the quantity of outlet straight well 5, drilled out with making cave 3 for starting point using the method for underbalance directional drilling and outlet
The horizontal well 4 that straight well 5 is connected, an outlet straight well 5 and makes between cave 3 and has a horizontal well 4；Go out when a horizontal well 4 is drilled into one
It is middle target in the range of the bottom 0-2m of gas straight well 5, tripping in punching glass reinforced plastic pipe supporting, does not cement the well, the aperture for punching glass reinforced plastic pipe is
2-4cm。
One kind carries out coal underground gasification method with above-mentioned underground gasification furnace, and it is comprised the following steps that：
Combustion adjuvant is passed through by the wellheadpressure (3-5MPa) of inlet well, and drive combustion adjuvant make be diffused at cave 3 it is each
In horizontal well 4, coal seam is lighted as ignition point using each bottom of outlet straight well 5, by the gas after gasifying in each horizontal well 4 through going out
Gas straight well 5 exports.
The underground gasification furnace and its construction method that the present embodiment is provided, flexibly build, pass through with reference to U-shaped butt shaft technology
One inlet well corresponds to multiple horizontal wells 4 and outlet straight well 5, has built a kind of pencil multichannel underground gasification furnace, has greatly shortened
The stove time is built, save and built stove cost.Gasification tunnel (the horizontal well of a plurality of different layers position is built for the coal seam of different-thickness
4), a plurality of gasification tunnel only corresponds to a bite inlet well, three-dimensional arrangement gasification tunnel, substantially increases Seams with Different Thickness resource
Gasification exploitation utilization rate.Underground coal gasification(UCG) is carried out using above-mentioned underground gasification furnace, it is same that a plurality of gasification tunnel of pencil can be achieved
Shi Jinhang gasifies, and improves gasification efficiency.
The underground gasification furnace has the beneficial effect that：
1st, multi-use, the utilization rate of Seams with Different Thickness resource is improved.The type of furnace can be directed to Seams with Different Thickness and build
Pencil gasification tunnel, by a point horizontally disposed gasification tunnel, the gasification exploitation for substantially increasing Seams with Different Thickness resource utilizes
Rate.
That the 2nd, reduces underground gasification furnace builds stove time and cost.By a U-shaped well straight well section and inclination section, can complete more
The structure of bar horizontal segment, building the stove time for underground gasification furnace is greatlyd save, meanwhile, greatly reduce and build stove cost.
3rd, realize that one enters to have more, gasify simultaneously.The catalyzed gas that one well is passed through is distributed to each gasification tunnel in underground, is in
Existing pencil multichannel while vaporized state.
Some one exemplary embodiments of the present utility model are only described by way of explanation above, undoubtedly, for
One of ordinary skill in the art, can be with a variety of in the case of without departing from spirit and scope of the present utility model
Mode is modified to described embodiment.Therefore, above-mentioned accompanying drawing and description are inherently illustrative, should not be construed as
Limitation to the utility model claims protection domain.
Claims (7)
- A kind of 1. underground gasification furnace, it is characterised in that including：One inlet well, it includes interconnected vertical section and inclination section, and well head is located on the vertical section, the inclination section Positioned at the lower section of the vertical section；One is made cave, and it is connected with the end of the inclination section；Multiple outlet straight wells, each outlet straight well are connected between cave with described make by an at least horizontal well.
- 2. underground gasification furnace according to claim 1, it is characterised in that the inclination section is shaped as curvature to be positive recessed Bent arc.
- 3. underground gasification furnace according to claim 2, it is characterised in that the outlet straight well is three.
- 4. underground gasification furnace according to claim 3, it is characterised in that each outlet straight well and described make pass through between cave One horizontal well is connected.
- 5. underground gasification furnace according to claim 4, it is characterised in that the inclination section is located at seat earth top 5-7m Place.
- 6. underground gasification furnace according to claim 5, it is characterised in that the volume for making cave is 5-8m3。
- 7. underground gasification furnace according to claim 1, it is characterised in thatWhen the horizontal well is three, the volume for making cave 3 is 5-8m3；When the horizontal well is n, n ＞ 3, the volume for making cave 3 is 5-8m31.2n-3-1.3n-3Times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720901011.6U CN207144919U (en) | 2017-07-24 | 2017-07-24 | Underground gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720901011.6U CN207144919U (en) | 2017-07-24 | 2017-07-24 | Underground gasification furnace |
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| Publication Number | Publication Date |
|---|---|
| CN207144919U true CN207144919U (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720901011.6U Active CN207144919U (en) | 2017-07-24 | 2017-07-24 | Underground gasification furnace |
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| CN (1) | CN207144919U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227947A (en) * | 2017-07-24 | 2017-10-03 | 新疆国利衡清洁能源科技有限公司 | Underground gasification furnace, construction method thereof and underground coal gasification method |
| CN109736766A (en) * | 2019-01-31 | 2019-05-10 | 中国矿业大学 | Strengthen the advanced pressure break C-shaped furnace method in coal seam of underground coal gasification(UCG) chemical reaction |
-
2017
- 2017-07-24 CN CN201720901011.6U patent/CN207144919U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227947A (en) * | 2017-07-24 | 2017-10-03 | 新疆国利衡清洁能源科技有限公司 | Underground gasification furnace, construction method thereof and underground coal gasification method |
| CN109736766A (en) * | 2019-01-31 | 2019-05-10 | 中国矿业大学 | Strengthen the advanced pressure break C-shaped furnace method in coal seam of underground coal gasification(UCG) chemical reaction |
| CN109736766B (en) * | 2019-01-31 | 2020-11-03 | 中国矿业大学 | Coal seam advanced fracturing C-shaped furnace method for strengthening coal underground gasification chemical reaction |
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