A low-concentration gas combustion device

Abstract

The present invention discloses a low-concentration gas combustion device, which includes an air intake assembly, a gas mixing assembly and a combustion chamber. The air intake assembly is communicated with the gas mixing assembly, and the gas mixing assembly is communicated with the combustion chamber through a delivery hose. Low-concentration gas and liquefied petroleum gas enter the gas mixing assembly through the air intake assembly, and are mixed in the gas mixing assembly. The mixed gas is delivered to the combustion chamber through the delivery hose for combustion. Therefore, a combustion device is provided to treat the low-concentration coal mine gas generated during coal mining through combustion.

Description

Technical Field

[0001] The present invention belongs to the technical field of combustion devices, and particularly relates to a low-concentration gas combustion device. Background Art

[0002] Coal mine gas is an unconventional natural gas stored in coal seams. Therefore, coal mine gas is generated during the coal mining process. The main component of coal mine gas is methane (CH4). The explosion range of methane in the atmosphere is 5-15% by volume. Therefore, for safe mining, coal mine gas is mixed with air to form low-concentration coal mine gas. The concentration of methane in low-concentration coal mine gas is usually less than 5%, and even less than 1%. Therefore, low-concentration coal mine gas with a methane volume concentration of less than 5% is difficult to obtain and difficult to be combusted and utilized due to its large gas volume, thin gas resources, and large changes in concentration and flow rate.

[0003] At present, most of the coal mine gas generated during the coal mining process belongs to low-concentration coal mine gas, and there is a problem of difficult combustion. Therefore, it is usually discharged into the atmosphere in the form of waste gas. Methane is one of the main greenhouse gases causing global warming. Therefore, the emission of low-concentration coal mine gas into the atmosphere will cause air pollution. Therefore, a combustion device is needed to treat the low-concentration coal mine gas generated during the coal mining process by combustion. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-concentration gas combustion device to solve the technical problem that the emission of low-concentration coal mine gas into the atmosphere in the prior art will cause air pollution.

[0005] The solution adopted by the present invention to solve its technical problems is as follows:

[0006] A low-concentration gas combustion device includes an intake assembly, a gas mixing assembly, and a combustion chamber. The intake assembly and the gas mixing assembly are connected, and the gas mixing assembly and the combustion chamber are connected through a delivery hose. Low-concentration gas and liquefied petroleum gas enter the gas mixing assembly through the intake assembly and are mixed in the gas mixing assembly. The mixed gas is transported to the combustion chamber through the delivery hose for combustion.

[0007] By setting up the intake component, the low-concentration gas source and the liquefied petroleum gas source are connected to the gas mixing component, enabling the low-concentration gas and the liquefied petroleum gas to enter the gas mixing component through the intake component; by setting up the gas mixing component, the low-concentration gas and the liquefied petroleum gas are mixed to form a mixed gas; the mixed gas is transported through a delivery hose to the combustion chamber for combustion; since the liquefied petroleum gas has a higher calorific value and is easy to burn stably, while the low-concentration gas has a low calorific value and is not easy to burn, by setting up the gas mixing component, the two gases are mixed, and the liquefied petroleum gas with a high calorific value can strengthen the combustion of the low-concentration gas with a low calorific value, enabling the low-concentration gas to burn stably; therefore, through the combustion method, the low-concentration coal mine gas generated during coal mining is treated, reducing the emission of low-concentration coal mine gas.

[0008] Further, the gas mixing component includes an inner pipe, an outer pipe, a first sealing plate, and a second sealing plate. The inner pipe is inserted into the outer pipe and coaxially arranged. The two ends of the inner pipe and the outer pipe are respectively closed by the first sealing plate and the second sealing plate. A plurality of partition plates are arranged at intervals along the length direction of the inner pipe in the inner pipe. A number of through holes are provided on the side wall of the inner pipe and each partition plate; the intake component is installed on the outer side of the first sealing plate, and the low-concentration gas enters the annular cavity between the inner pipe and the outer pipe through the intake component; the liquefied petroleum gas enters the inner pipe through the intake component. A part of the liquefied petroleum gas in the inner pipe can diffuse into the annular cavity between the inner pipe and the outer pipe through the through holes on the side wall of the inner pipe and mix with the low-concentration gas; another part of the liquefied petroleum gas in the inner pipe flows along the length direction of the inner pipe towards the side where the second sealing plate is located through the through holes on the partition plates; at least two mixed gas extraction pipes are installed on the outer side of the second sealing plate; at least one mixed gas extraction pipe is provided at the part of the second sealing plate located in the inner pipe; at least one mixed gas extraction pipe is provided at the part of the second sealing plate located between the inner pipe and the outer pipe; each mixed gas extraction pipe is connected to the outer pipe or the inner pipe, and each mixed gas extraction pipe is connected to the combustion chamber through a corresponding delivery hose.

[0009] By setting the first sealing plate and the second sealing plate, the two ends of the inner pipe and the outer pipe are respectively closed. The internal space of the inner pipe is mainly used for the flow of liquefied petroleum gas, and the annular space between the inner pipe and the outer pipe is mainly used for the flow of low-concentration gas; by setting through holes on the side wall of the inner pipe, the liquefied petroleum gas diffuses into the annular space between the inner pipe and the outer pipe through the through holes on the side wall of the inner pipe and mixes with the low-concentration gas; by setting through holes on the partition plates, the partition plates themselves can slow down the flow rate of the liquefied petroleum gas, providing sufficient time for the diffusion of the liquefied petroleum gas and at the same time reducing the consumption of the liquefied petroleum gas; by setting the mixed gas extraction pipes, the liquefied petroleum gas in the inner pipe and the mixed gas in the annular cavity are led out of the gas mixing component and transported to the combustion chamber through the delivery hoses.

[0010] Furthermore, the intake assembly includes a liquefied petroleum gas inlet pipe and at least two low-concentration gas inlet pipes; the liquefied petroleum gas inlet pipe is installed on the first sealing plate, and the outlet of the liquefied petroleum gas inlet pipe is located in the inner pipe; all the low-concentration gas inlet pipes are circumferentially and uniformly installed on the first sealing plate around the central axis of the inner pipe, and the outlet of each low-concentration gas inlet pipe is located between the outer pipe and the inner pipe.

[0011] By providing the liquefied petroleum gas inlet pipe, the cavity in the inner pipe and the liquefied petroleum gas gas source are connected through the liquefied petroleum gas inlet pipe; by providing the low-concentration gas inlet pipes, the annular cavity between the inner pipe and the outer pipe and the low-concentration gas gas source are connected through the low-concentration gas inlet pipes.

[0012] Furthermore, the combustion chamber is a whole columnar body, and there is a cavity for gas combustion inside the columnar body. One end of the combustion chamber is conical, and there is an opening at the end of this end. The opening is connected to the cavity of the combustion chamber and serves as the outlet of the combustion chamber; on the other end of the combustion chamber, there are combustion chamber inlet pipes with the same number as the conveying hoses, and each combustion chamber inlet pipe is connected to the cavity of the combustion chamber.

[0013] By providing the combustion chamber inlet pipes, the conveying hoses and the combustion chamber cavity are connected through the combustion chamber inlet pipes; by providing the combustion chamber cavity, a combustion place is provided for the mixed gas.

[0014] Furthermore, two cooling air pipes are installed on the outer side wall of the combustion chamber. The two cooling air pipes are connected to the cavity of the combustion chamber and are located on both sides of the combustion chamber.

[0015] By providing the two cooling air pipes, the cooling air enters the combustion chamber cavity through the cooling air pipes, and the heat and waste gas generated by the combustion of the mixed gas are discharged through the outlet of the combustion chamber.

[0016] Furthermore, an ignition pipe is installed on the outer side wall of the combustion chamber, and an igniter can be installed in the ignition pipe.

[0017] By providing the ignition pipe, the igniter can be installed in the ignition pipe, and the igniter can ignite the mixed gas in the combustion chamber cavity to ensure the combustion of the mixed gas.

[0018] Furthermore, an observation window is provided on the combustion chamber.

[0019] By providing the observation window, the user can observe through the observation window whether the combustion chamber is successfully ignited and whether it burns stably.

[0020] The beneficial effects of the present invention are:

[0021] 1. By setting up a gas mixing component, low-concentration gas and liquefied petroleum gas are mixed to form a mixed gas. The mixed gas is transported through a delivery hose to a combustion chamber for combustion. Since liquefied petroleum gas has a high calorific value and is easy to burn stably, while low-concentration gas has a low calorific value and is not easy to burn, by setting up the gas mixing component, the two gases are mixed, and the liquefied petroleum gas with a high calorific value can strengthen the combustion of the low-concentration gas with a low calorific value, enabling the low-concentration gas to burn stably. Therefore, through the combustion method, the low-concentration coal mine gas generated during coal mining is treated, reducing the emissions of low-concentration coal mine gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shows a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 Shows a schematic diagram of the installation positions of the inner pipe and the partition plate.

[0024] Components, parts and numbers in the figure: intake assembly 1, outer pipe 2, mixed gas extraction pipe 3, delivery hose 4, combustion chamber intake pipe 5, ignition pipe 6, observation window 7, cooling air duct 8, combustion chamber outlet 9, combustion chamber 10, inner pipe 11, partition plate 12. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following gives the specific implementation methods of the invention, and clearly and completely describes the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0026] Embodiment 1: As Figure 1 shown, a low-concentration gas combustion device includes an intake assembly 1, a gas mixing component and a combustion chamber 10. The intake assembly 1 is in communication with the gas mixing component, and the gas mixing component and the combustion chamber 10 are in communication through a delivery hose 4. Low-concentration gas and liquefied petroleum gas enter the gas mixing component through the intake assembly 1 and are mixed in the gas mixing component. The mixed gas is transported to the combustion chamber 10 through the delivery hose 4 for combustion.

[0027] As Figure 2As shown in the figure, the gas mixing assembly includes an inner pipe 11, an outer pipe 2, a first sealing plate and a second sealing plate. The inner pipe 11 is inserted into the outer pipe 2 and is coaxially arranged. The two ends of the inner pipe 11 and the outer pipe 2 are respectively sealed by the first sealing plate and the second sealing plate. Thirteen partition plates 12 are arranged at intervals along the length direction of the inner pipe 11 in the inner pipe 11. A number of through holes are provided on the side wall of the inner pipe 11 and each partition plate 12; An air inlet assembly 1 is installed on the outer side of the first sealing plate. Low-concentration gas enters the annular cavity between the inner pipe 11 and the outer pipe 2 through the air inlet assembly 1; The liquefied petroleum gas enters the inner pipe 11 through the air inlet assembly 1. A part of the liquefied petroleum gas in the inner pipe 11 can diffuse into the annular cavity between the inner pipe 11 and the outer pipe 2 through the through holes on the side wall of the inner pipe, and mix with the low-concentration gas; Another part of the liquefied petroleum gas in the inner pipe 11 flows along the length direction of the inner pipe 11 towards the side where the second sealing plate is located through the through holes on the partition plate 12; Three mixed gas outlet pipes 3 are installed on the outer side of the second sealing plate; A part of the second sealing plate located in the inner pipe 11 is provided with a mixed gas outlet pipe 3; A part of the second sealing plate located between the inner pipe 11 and the outer pipe 2 is provided with two mixed gas outlet pipes 3. These two mixed gas outlet pipes 3 are circumferentially and evenly installed on the second sealing plate around the center line of the inner pipe; Each mixed gas outlet pipe 3 is communicated with the outer pipe 2 or the inner pipe 11, and each mixed gas outlet pipe 3 is communicated with the combustion chamber 10 through a corresponding conveying hose 4.

[0028] As Figure 1 shown in the figure, the air inlet assembly 1 includes a liquefied petroleum gas inlet pipe and two low-concentration gas inlet pipes; The liquefied petroleum gas inlet pipe is installed on the first sealing plate, and the outlet of the liquefied petroleum gas inlet pipe is located in the inner pipe; All the low-concentration gas inlet pipes are circumferentially and evenly installed on the first sealing plate around the center line of the inner pipe, and the outlet of each low-concentration gas inlet pipe is located between the outer pipe and the inner pipe.

[0029] As Figure 1 shown in the figure, the combustion chamber 10 is a columnar body as a whole. There is a cavity for gas combustion inside the columnar body. One end of the combustion chamber 10 is conical, and an opening is provided at the end of this end. The opening is communicated with the cavity of the combustion chamber and serves as the combustion chamber outlet 9; The other end of the combustion chamber 10 is provided with the same number of combustion chamber inlet pipes 5 as the conveying hose 4, and each combustion chamber inlet pipe 5 is communicated with the cavity of the combustion chamber 10.

[0030] As Figure 1 shown in the figure, two cooling air pipes 8 are installed on the outer side wall of the combustion chamber 10. The two cooling air pipes 8 are communicated with the cavity of the combustion chamber 10 and are located on both sides of the combustion chamber 10. The cooling air pipes 8 are communicated with the fan through a ventilation duct. The fan sends air into the combustion chamber 10 through the ventilation duct and the cooling air pipes 8. In this embodiment, the model of the fan is SC-75SA.

[0031] An ignition pipeline 6 is installed on the outer side wall of the combustion chamber 10, and an igniter can be installed in the ignition pipeline 6. In this embodiment, the igniter is an explosion-proof high-energy igniter with the model number XLGNFD-12.

[0032] An observation window 7 is provided on the combustion chamber 10. A fire-viewing pipeline is installed on the outer side wall of the combustion chamber 10. The fire-viewing pipeline is communicated with the cavity of the combustion chamber. The fire-viewing pipeline is made of alloy steel. A glass for observing the internal combustion condition of the combustion chamber is embedded in the fire-viewing pipeline, and the glass and the fire-viewing pipeline form the observation window 7 of the combustion chamber.

[0033] Usage method: First, ignite through the igniter, and then feed low-concentration gas and liquefied petroleum gas into the gas mixing assembly. In the gas mixing assembly, the low-concentration gas and liquefied petroleum gas are mixed with each other through the through holes on the side wall of the inner pipe. Then, the mixed gas is sent into the combustion chamber through the conveying hose for combustion. Confirm whether the mixed gas is successfully ignited and can stably burn through the observation window 7, and then feed in cooling air to discharge heat and waste gas. Therefore, through the combustion method, the low-concentration coal mine gas generated during coal mining is treated, and the emission of low-concentration coal mine gas is reduced.

[0034] Enlightened by the above ideal embodiment according to the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A low-concentration gas combustion device, characterized in that, It includes an intake assembly (1), a gas mixing assembly, and a combustion chamber (10). The intake assembly (1) is in communication with the gas mixing assembly, and the gas mixing assembly and the combustion chamber (10) are in communication through a delivery hose (4). Low-concentration gas and liquefied petroleum gas enter the gas mixing assembly through the intake assembly (1), and are mixed in the gas mixing assembly. The mixed gas is delivered to the combustion chamber (10) through the delivery hose (4) for combustion. The gas mixing assembly includes an inner tube (11), an outer tube (2), a first sealing plate, and a second sealing plate. The inner tube (11) is inserted into the outer tube (2) and is coaxially arranged. Both ends of the inner tube (11) and the outer tube (2) are closed by the first sealing plate and the second sealing plate respectively. A plurality of partition plates (12) are arranged at intervals along the length direction of the inner tube (11) in the inner tube (11). A number of through holes are provided on the side wall of the inner tube (11) and on each partition plate (12). The intake assembly (1) is installed on the outer side of the first sealing plate. Low-concentration gas enters the annular cavity between the inner tube (11) and the outer tube (2) through the intake assembly (1). Liquefied petroleum gas enters the inner tube (11) through the intake assembly (1). A part of the liquefied petroleum gas in the inner tube (11) can diffuse into the annular cavity between the inner tube (11) and the outer tube (2) through the through holes on the side wall of the inner tube, and is mixed with the low-concentration gas. Another part of the liquefied petroleum gas in the inner tube (11) flows along the length direction of the inner tube (11) towards the side where the second sealing plate is located through the through holes on the partition plate (12). At least two mixed gas outlet pipes (3) are installed on the outer side of the second sealing plate; at least one mixed gas outlet pipe (3) is provided at the part of the second sealing plate located in the inner tube (11); at least one mixed gas outlet pipe (3) is provided at the part of the second sealing plate located between the inner tube (11) and the outer tube (2); each mixed gas outlet pipe (3) is in communication with the outer tube (2) or the inner tube (11), and each mixed gas outlet pipe (3) is in communication with the combustion chamber (10) through a corresponding delivery hose (4). The intake assembly (1) includes a liquefied petroleum gas inlet pipe and at least two low-concentration gas inlet pipes. The liquefied petroleum gas inlet pipe is installed on the first sealing plate, and the outlet of the liquefied petroleum gas inlet pipe is located in the inner tube. All the low-concentration gas inlet pipes are circumferentially and uniformly installed on the first sealing plate around the center line of the inner tube, and the outlet of each low-concentration gas inlet pipe is located between the outer tube and the inner tube. The combustion chamber (10) is a columnar body as a whole. There is a cavity for gas combustion inside the columnar body. One end of the combustion chamber (10) is conical, and an opening is provided at the end of this end. The opening is in communication with the cavity of the combustion chamber and serves as the combustion chamber outlet (9). The other end of the combustion chamber (10) is provided with combustion chamber inlet pipes (5) having the same number as the delivery hoses (4). Each combustion chamber inlet pipe (5) is in communication with the cavity of the combustion chamber (10). Two cooling air ducts (8) are installed on the outer side wall of the combustion chamber (10). The two cooling air ducts (8) communicate with the cavity of the combustion chamber (10) and are located on both sides of the combustion chamber (10). The cooling air ducts and the fan are connected through a ventilation duct, and the fan sends air into the combustion chamber through the ventilation duct and the cooling air ducts.

2. The low-concentration gas combustion device according to claim 1, characterized in that, An ignition pipe (6) is installed on the outer side wall of the combustion chamber (10), and an igniter can be installed in the ignition pipe (6).

3. The low-concentration gas combustion device according to claim 2, characterized in that An observation window (7) is provided on the combustion chamber (10).

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