CN115405278A - Coal bed gas discharging and mining combustion mechanism and discharging and mining ignition device - Google Patents

Abstract

The invention provides a coal bed gas drainage and mining combustion mechanism and a drainage and mining ignition device, and relates to the technical field of coal bed gas combustion treatment, wherein the coal bed gas drainage and mining combustion mechanism comprises a protective cover and a combustion pipe, the protective cover is arranged in a through manner along the axial direction, the protective cover is sleeved on the outer side of the combustion pipe, a gas outlet is arranged on the combustion pipe and is positioned in the protective cover, and a combustion chamber is defined by the inner wall of the protective cover and the outer wall of the combustion pipe; the discharging and mining ignition device comprises an ignition mechanism and the coal bed gas discharging and mining combustion mechanism; the protective cover disclosed by the invention can effectively block wind power and avoid flame from being extinguished due to overlarge wind power, and can form a combustion chamber with the combustion pipe by adopting an up-and-down through structure.

Description

Coal bed gas discharging and mining combustion mechanism and discharging and mining ignition device

Technical Field

The invention relates to the technical field of combustion treatment of coal bed gas, in particular to a coal bed gas discharging and mining combustion mechanism and a discharging and mining ignition device.

Background

The coal bed gas is also called coal bed adsorbed gas, coal bed methane or coal mine gas, is unconventional natural gas which is self-generated, self-stored and adsorbed on the surface of coal molecules, is a novel potential energy with huge reserves, is stored in a complicated crack-pore system of a coal bed, and has potential safety hazards if the coal bed gas extracted from a coal bed gas well is directly discharged, and is greenhouse gas, so that the environment is greatly influenced.

At present, the extracted gas of the coal bed gas well mostly adopts a combustion mode, the extracted gas is fully combusted, and the greenhouse effect caused by direct discharge of methane gas is reduced, the extracted gas is combusted by adopting a high-altitude torch at present, the traditional high-altitude torch generally comprises a torch body, a gas pipe is communicated with the torch body, the torch body is provided with an ignition device, in the using process, the extracted gas is introduced into the torch body by the gas pipe, the ignition device ignites to enable the extracted gas to be combusted, the traditional high-altitude torch is in the combustion process, when wind power is large, flame is easy to extinguish, so that the combustion of the extracted gas is influenced, in order to solve the problem, the high-altitude torch with the wind-proof cover is currently provided, the bracket is arranged on the top side of the torch body, the wind-proof cover is additionally arranged on the bracket, if the wind-proof cover is only arranged on the top of the bracket, the wind-proof effect is poor, the flame is still easy to extinguish, if the wind-proof cover is arranged on the periphery and the top of the bracket, the air flow is poor, the combustion is also influenced, the existing high-altitude torch is easy to extinguish, and the extracted gas is unstable, and the continuous combustion of the extracted gas is poor.

Disclosure of Invention

The invention aims to provide a coal bed gas discharging and mining combustion mechanism and a discharging and mining ignition device, which are used for solving the technical problems that the coal bed gas well in the prior art is unstable in combustion and poor in continuity by adopting the conventional high-altitude torch; the invention provides a plurality of technical effects which can be generated by the optimized technical scheme in the technical schemes; see below for details.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a coal bed gas discharging and mining combustion mechanism, which comprises a protective cover and a combustion pipe, wherein: the protective cover is arranged in a penetrating way along the axial direction; the protection casing cover is established the combustion tube outside, be provided with the gas outlet on the combustion tube, the gas outlet is located inside the protection casing, the inner wall of protection casing with the outer wall of combustion tube encloses into the combustion chamber.

Preferably, the air inlet end of the combustion tube is located below the protective cover; the air outlet end of the combustion pipe is plugged, and the air outlet is formed in the pipe wall of the combustion pipe.

Preferably, the number of the air outlets is set to be multiple, and all the air outlets are circumferentially and uniformly distributed; the air outlet is arranged at a position corresponding to the upper section of the protective cover.

Preferably, the protective cover is a cylinder structure with two ends penetrating; the combustion tube and the protective cover are arranged coaxially.

Preferably, a one-way valve is arranged on the combustion pipe.

Preferably, the inner side of the protective cover is provided with a supporting mechanism, and the combustion tube is arranged on the supporting mechanism.

Preferably, the supporting mechanism comprises a plurality of horizontal supporting ribs, and all the horizontal supporting ribs are uniformly arranged along the circumferential direction of the combustion pipe; the number of the supporting mechanisms is set to be a plurality, and all the supporting mechanisms are arranged along the axial level of the burner pipe.

The invention provides a discharging and mining ignition device which comprises an ignition mechanism and any one of the coal bed gas discharging and mining combustion mechanisms.

Preferably, the ignition mechanism comprises a lifting pulley, a cable and a torch, wherein: the lifting pulley is rotatably arranged on the wall of the protective cover, the stay cable is wound on the lifting pulley, and the torch can be connected with the stay cable and can lift along with the stay cable.

Preferably, the extraction firing means comprises a delivery pipe, wherein: the conveying pipe is connected with the air inlet end of the combustion pipe; the conveying pipe is provided with a control valve.

The coal bed gas discharging, mining and combusting mechanism and the discharging, mining and igniting device provided by the invention at least have the following beneficial effects:

the coal bed gas is arranged and is adopted burning mechanism includes protection casing and combustion tube, and the protection casing has the effect of protection, can effectively shelter from external wind-force, reduces its influence to inside flame, and the combustion tube is used for gaseous transport.

The protective cover is arranged in a through mode along the axial direction, the protective cover is sleeved on the outer side of the combustion pipe, an air outlet is formed in the combustion pipe and located in the protective cover, and a combustion chamber is defined by the inner wall of the protective cover and the outer wall of the combustion pipe; the protective cover is matched with the combustion pipe to form a combustion chamber, so that space is provided for gas combustion.

In the actual combustion process, gas enters the combustion chamber through the gas outlet of the combustion pipe for combustion, the temperature of the combusted gas is high, the density of the combusted gas is low, the combusted gas rises and is discharged from the upper part of the protective cover, a low-pressure area is formed below the combustion chamber while the gas is combusted, air with low temperature and high density is sucked into the combustion chamber from the lower part of the protective cover to form flowing air flow, and flame gas is continuously discharged from the upper part.

The discharging and mining ignition device comprises an ignition mechanism and a coal bed gas discharging and mining combustion mechanism, wherein the ignition mechanism is used for igniting gas, and the coal bed gas discharging and mining combustion mechanism can realize stable and continuous combustion of the gas.

The invention adopts the protective cover with the axial through structure, on one hand, the protective cover has good protective effect, can effectively reduce the influence of external wind on flame, avoids flame extinction caused by overlarge wind power, improves the combustion stability, on the other hand, the protective cover is mutually matched with the combustion pipe to form a combustion chamber which is communicated with the outside up and down, and under the action of a hot pressing principle, flowing air flow of air entering from the upper exhaust gas discharge and the lower exhaust gas discharge can be formed, thereby effectively ensuring the stability and continuity of flame combustion.

The invention not only can effectively improve the stability and continuity of the combustion of the coal bed gas, has obvious combustion effect, enables the coal bed gas to be discharged up to the standard and meets the requirement of environmental protection, but also has simple integral structure, convenient installation, low cost and convenient popularization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional structural view of an embodiment of a coal bed methane extraction combustion mechanism of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of a coal bed methane extraction combustion mechanism according to the present invention;

FIG. 3 is a schematic top view of a coal bed methane extraction combustion mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional structural view of a coal bed methane extraction combustion mechanism with a check valve according to the present invention;

FIG. 5 is a schematic structural view of a coal bed methane gas exhausting combustion mechanism with a lifting pulley mounted in a slot of a shield cover according to the present invention;

FIG. 6 is a schematic plan view of another embodiment of a coalbed methane mining combustion mechanism of the present invention;

FIG. 7 is a schematic structural view of a coal bed methane extraction combustion mechanism according to still another embodiment of the present invention;

FIG. 8 is a schematic top view of a coal bed methane extraction combustion mechanism according to a further embodiment of the present invention;

FIG. 9 is a schematic view of the pilot ignition device of the present invention.

Reference numerals

1. A coal bed gas extraction combustion mechanism; 11. a protective cover; 111. a support frame; 112. grooving; 12. a combustion tube; 121. an air outlet; 122. an air outlet end; 13. a combustion chamber; 14. a support mechanism; 141. horizontal support ribs; 15. a one-way valve; 2. an ignition mechanism; 21. a lifting pulley; 22. a cable; 3. a delivery pipe; 4. and a control valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example 1:

the invention provides a coal bed gas extraction combustion mechanism 1, and referring to fig. 1, the coal bed gas extraction combustion mechanism 1 comprises a protective cover 11 and a combustion pipe 12.

The protection cover 11 is arranged to penetrate axially, an upper opening is formed at the top of the protection cover 11, and a lower opening is formed at the bottom of the protection cover 11.

The protection cover 11 is sleeved outside the combustion pipe 12, an air outlet 121 is arranged on the combustion pipe 12, the air outlet 121 is located inside the protection cover 11, and a combustion chamber 13 is defined by the inner wall of the protection cover 11 and the outer wall of the combustion pipe 12.

When in use, the combustion pipe 12 conveys the coal bed gas into the combustion chamber 13 from the gas outlet 121, and the coal bed gas is combusted in the combustion chamber 13.

In the combustion process, the protective cover 11 can effectively block wind power, the extinguishment of flame caused by overlarge wind power is reduced, and the combustion stability is improved.

When the coal bed gas is combusted, the gas generated by combustion in the combustion chamber 13 has high temperature and low density, and is discharged through the upper opening, and the air outside the combustion chamber 13 has low temperature and high density, and enters the combustion chamber 13 through the lower opening to form flowing airflow, so that the air can be continuously supplemented into the combustion chamber 13, and the stability and continuity of combustion are effectively ensured.

The protective cover 11 can effectively block wind power and avoid flame extinguishment caused by overlarge wind power, and adopts an up-and-down through structure to form a combustion chamber 13 with the combustion pipe 12, so that flowing air flow entering from the upper part and the lower part can be formed under the action of a hot pressing principle, combustion is stable and continuous, the whole structure is simple, installation is convenient, operability is strong, fault rate is low, and production and use cost is low.

Example 2

Example 2 is based on example 1:

as shown in fig. 1 to 3, the intake end of the combustion pipe 12 is located below the protection cover 11 and is connected to the delivery pipe 3.

The gas outlet end 122 of the combustion tube 12 is plugged, the gas outlet 121 is arranged on the wall of the combustion tube 12 close to the gas outlet end 122, the gas outlet end 122 adopts a plugging structure, the phenomenon that the combustion tube 12 is not smooth in gas outlet due to rain, snow and the like entering the combustion tube 12 can be effectively prevented, and the combustion effect is effectively guaranteed.

Preferably, the combustion pipe 12 is a seamless steel pipe having a diameter of 50 mm.

As an alternative embodiment, as shown in fig. 1, the number of the gas outlets 121 is set to be multiple, and all the gas outlets 121 are uniformly distributed in the circumferential direction, so that the coal seam gas can be discharged in the circumferential direction.

All the air outlets 121 can be uniformly distributed in the circumferential direction of a single layer or in the circumferential direction of multiple layers.

The air outlet 121 is disposed at a position corresponding to an upper section of the protection cover 11, so as to facilitate generation of upward and downward flowing air flows and improve continuity of combustion.

As an alternative embodiment, as shown in fig. 1 and 2, the protection cover 11 is configured as a cylindrical structure with two ends penetrating through, and the protection cover 11 is configured as a circular cylindrical structure, so that the structure is simple, the production and manufacturing are convenient, and the production cost is low.

Preferably, the protective cover 11 is made of a steel pipe with a diameter of 160mm, a wall thickness of 5mm and an axial length of 500 mm.

The combustion tube 12 and the protective cover 11 are coaxially arranged, and are matched with the gas outlets 121 distributed in the circumferential direction, so that gas outlet is more uniform.

As an alternative embodiment, as shown in fig. 4, a check valve 15 is arranged on the combustion pipe 12, the check valve 15 is in one-way flow, so that the coal bed gas can only flow from the combustion pipe 12 to the combustion chamber 13, and it can be effectively avoided that when the gas pressure is low, gas backflow occurs, which causes combustion or even explosion of the entire combustion pipe 12, and the check valve 15 is a safety backfire device of the combustion pipe 12, and is safe and reliable to use.

As an alternative embodiment, as shown in fig. 1, the inside of the shield 11 is provided with a support mechanism 14, and the combustion pipe 12 is provided on the support mechanism 14.

The supporting mechanism 14 is used for connecting and supporting the protective cover 11 and the combustion tube 12, so that the integral structure is firmer.

As an alternative embodiment, as shown in fig. 3, the supporting mechanism 14 includes a plurality of horizontal supporting ribs 141, and all the horizontal supporting ribs 141 are uniformly arranged along the circumferential direction of the combustion pipe 12, and are uniformly stressed and structurally firm.

Preferably, the horizontal support rib 141 is a reinforcing steel bar having a diameter of 20 mm.

As shown in fig. 1, the number of the supporting mechanisms 14 is multiple, and all the supporting mechanisms 14 are arranged along the axial level of the combustion tube 12, so as to further improve the structural firmness.

Preferably, as shown in fig. 3, the number of the support mechanisms 14 is set to two, and each support mechanism 14 has three horizontal support ribs 141.

Example 3

Example 3 differs from example 2 in that:

as shown in fig. 6, the supporting mechanism 14 includes a horizontal supporting rib 141, and both ends of the horizontal supporting rib 141 connect the inner wall of the protection cover 11 and the outer wall of the combustion pipe 12.

The number of the support mechanisms 14 is set to be plural, and all the support mechanisms 14 are arranged in stages along the axial direction of the burner tube 12.

The embodiment has the advantages of simple structure, convenient manufacture and low cost.

Example 4

Example 4 is different from example 2 in that:

as shown in fig. 7 and 8, the protection cover 11 has a rectangular parallelepiped structure, and both ends thereof penetrate therethrough.

The supporting mechanism 14 includes four horizontal supporting ribs 141, and the four horizontal supporting ribs 141 are circumferentially and uniformly arranged and are respectively vertically connected with the four cover walls of the protection cover 11.

The number of the support mechanisms 14 is set to be plural, and all the support mechanisms 14 are arranged in stages along the axial direction of the combustion pipe 12.

Similarly, the protective cover 11 may be provided in other shapes such as polygonal prism, elliptic cylinder, etc.

Example 5:

embodiment 5 is based on any of the embodiments described above:

the invention provides a drainage and mining ignition device, which comprises an ignition mechanism 2 and a coal bed gas drainage and mining combustion mechanism 1, as shown in figure 9.

The ignition mechanism 2 comprises a lifting pulley 21, a guy cable 22 and a torch, wherein the lifting pulley 21 is made of No. 45 common steel materials, and the guy cable 22 is made of 8mm steel wire ropes.

The lifting pulley 21 is rotatably arranged at the bottom side of the wall of the protective cover 11, the pull rope 22 is wound on the lifting pulley 21, and the torch can be connected with the pull rope 22 and can lift along with the pull rope 22.

In the actual use process, the fire handle is connected to the pull rope 22, and then the pull rope 22 is pulled, so that the fire handle can be lifted to the coal bed methane extraction combustion mechanism 1.

Alternatively, as shown in fig. 2, a support frame 111 is provided on an outer wall of the protection cover 11, and the lifting pulley 21 is rotatably provided on the support frame 111.

Alternatively, as shown in fig. 5, the bottom side of the outer wall of the protection cover 11 is provided with a slot 112, and the lifting pulley 21 is rotatably disposed in the slot 112.

Adopt manual ignition, realize high altitude ignition through lift pulley 21 and cable 22, not only the ignition effect is showing, simple structure moreover, production and maintenance low cost, compare the electronic ignition who feeds easily in severe cold district simultaneously, use more stably, application scope is more extensive.

The lifting pulley 21 is arranged on the bottom side of the wall of the protective cover 11, and the protective cover 11 is located at the position of a low-pressure area, so that high-temperature damage of flame to the inhaul cable 22 can be effectively reduced.

As an alternative embodiment, as shown in fig. 9, the ignition mechanism 2 further includes an auxiliary pulley disposed on the ground, and a cable 22 is wound around the lifting pulley 21 and the auxiliary pulley.

As an alternative embodiment, as shown in fig. 9, the extraction ignition device comprises a delivery pipe 3.

The conveying pipe 3 is connected with the air inlet end of the combustion pipe 12, the conveying pipe 3 is provided with a control valve 4, and the gas flow of the coal bed gas can be controlled by adjusting the opening degree of the control valve 4.

In the process of actual use, the installation height of the coal bed gas extraction and combustion mechanism 1 can be adjusted according to actual conditions so as to meet the requirements of field safety and fire prevention.

In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

In addition, in the description of the present application, "a plurality" or "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The utility model provides a coal bed gas is arranged and is adopted burning mechanism which characterized in that, includes protection casing and combustion tube, wherein:

the protective cover is arranged in a penetrating way along the axial direction;

the protection casing cover is established the combustion tube outside, be provided with the gas outlet on the combustion tube, the gas outlet is located inside the protection casing, the inner wall of protection casing with the outer wall of combustion tube encloses into the combustion chamber.

2. The coal seam gas extraction combustion mechanism of claim 1, wherein the gas inlet end of the combustion pipe is located below the shield;

the air outlet end of the combustion pipe is plugged, and the air outlet is formed in the pipe wall of the combustion pipe.

3. The coal bed gas extraction combustion mechanism of claim 2, wherein the number of the gas outlets is multiple, and all the gas outlets are circumferentially and uniformly distributed;

the air outlet is arranged at a position corresponding to the upper section of the protective cover.

4. The coal bed methane extraction combustion mechanism of claim 1, wherein the shield is configured as a tubular structure with two ends extending therethrough;

the combustion pipe and the protective cover are coaxially arranged.

5. The coal bed methane extraction combustion mechanism as claimed in claim 1, wherein a one-way valve is disposed on the combustion pipe.

6. The coal bed methane extraction and combustion mechanism of claim 1, wherein a support mechanism is disposed on an inner side of the shield, and the combustion tube is disposed on the support mechanism.

7. The coal bed methane extraction and combustion mechanism according to claim 6, wherein the support mechanism comprises a plurality of horizontal support ribs, and all the horizontal support ribs are uniformly arranged along the circumferential direction of the combustion pipe;

the number of the supporting mechanisms is set to be a plurality, and all the supporting mechanisms are arranged along the axial level of the burner pipe.

8. A drainage and mining ignition device, characterized by comprising an ignition mechanism and the coal bed gas drainage and mining combustion mechanism as defined in any one of claims 1 to 7.

9. The extraction fire ignition device of claim 8, wherein the fire ignition mechanism includes a lift pulley, a pull cable, and a torch, wherein:

the lifting pulley is rotatably arranged on the wall of the protective cover, the stay cable is wound on the lifting pulley, and the torch can be connected with the stay cable and can lift along with the stay cable.

10. The drainage and mining ignition device of claim 8, comprising a duct, wherein:

the delivery pipe is connected with the air inlet end of the combustion pipe;

the conveying pipe is provided with a control valve.

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