CN217584449U - Low-concentration gas combustion device - Google Patents

Abstract

The utility model discloses a low-concentration gas combustion device, which comprises an air inlet component, a gas mixing component and a combustion chamber, wherein the air inlet component is communicated with the gas mixing component, and the gas mixing component is communicated with the combustion chamber through a conveying hose; low concentration gas and liquefied petroleum gas pass through the subassembly that admits air, get into the gas mixing subassembly to mix in the gas mixing subassembly, mix the gas and carry through the delivery hose and burn in carrying the combustion chamber, so provide a burner, handle the coal mining in-process through the mode of combustion, produced low concentration coal mine gas.

Description

A low-concentration gas combustion device

technical field

The utility model belongs to the technical field of combustion devices, in particular to a low-concentration gas combustion device.

Background technique

Coal mine gas is a kind of unconventional natural gas stored in coal seams, so coal mine gas will be generated during the mining process of coal mines. The main component of coal mine gas is methane (CH ₄ ), and the explosion range of methane in the atmosphere is 5 by volume. ~15%, so in order to mine safely, coal mine methane is mixed with air to form low-concentration coal mine methane; the concentration of methane in low-concentration coal mine methane is usually less than 5%, or even less than 1%, so the volume concentration of methane is less than 5%. Low-concentration coal mine gas is difficult to obtain due to large gas volume, rare gas resources, and large changes in concentration and flow rate, and it is difficult to be burned and utilized.

At present, most of the coal mine methane produced in the coal mining process belongs to low concentration coal mine methane, which is difficult to burn, so it is usually discharged into the atmosphere in the form of exhaust gas, and methane is one of the main greenhouse gases that cause global warming, so The emission of low-concentration coal mine gas into the atmosphere will cause air pollution, so a combustion device is needed to deal with the low-concentration coal mine gas generated during the coal mining process by combustion.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a low-concentration gas burning device, which solves the technical problem that low-concentration coal mine gas is discharged into the atmosphere and causes atmospheric pollution in the prior art.

The scheme adopted by the utility model to solve its technical problem is:

A low-concentration gas combustion device includes an air intake assembly, a gas mixing assembly and a combustion chamber, the air intake assembly and the gas mixing assembly are communicated, and the gas mixing assembly and the combustion chamber are communicated through a conveying hose; The gas component enters the gas mixing component and is mixed in the gas mixing component, and the mixed gas is transported to the combustion chamber through the delivery hose for combustion.

By setting the air intake assembly, the low-concentration gas source and the liquefied petroleum gas source are connected to the gas mixing assembly, so that the low-concentration gas and liquefied petroleum gas can enter the gas mixing assembly through the air intake assembly; Low-concentration gas and liquefied petroleum gas are mixed to form mixed gas; the mixed gas is transported to the combustion chamber through the conveying hose for combustion; due to the high calorific value of liquefied petroleum gas, it is easy to burn stably, while the low-concentration gas has a low calorific value and is not easy to burn Therefore, by setting up a gas mixing component to mix the two gases, the high calorific value liquefied petroleum gas can strengthen the combustion of the low calorific value and low concentration gas, so that the low concentration gas can burn stably; The low-concentration coal mine methane produced in the process reduces the emission of low-concentration coal mine methane.

Further, the gas mixing assembly includes an inner tube, an outer tube, a first sealing plate and a second sealing plate, the inner tube is inserted into the outer tube and arranged coaxially, and both ends of the inner tube and the outer tube are respectively covered by the first sealing plate. and the second sealing plate is closed, the inner tube is provided with a plurality of partition plates at intervals along the length direction of the inner tube, the side wall of the inner tube and each partition plate are provided with a number of through holes; the first sealing plate The air inlet assembly is installed on the outer side, and the low-concentration gas enters the annular cavity between the inner pipe and the outer pipe through the air inlet assembly; the liquefied petroleum gas enters the inner pipe through the air inlet assembly, and a part of the liquefied petroleum gas in the inner pipe can pass through the inner pipe. The through hole on the side wall of the pipe diffuses into the annular cavity between the inner pipe and the outer pipe, and mixes with the low-concentration gas; the other part of the liquefied petroleum gas in the inner pipe passes through the through hole on the partition plate, along the inner pipe. The length direction flows to the side where the second sealing plate is located; at least two mixed gas extraction pipes are installed on the outside of the second sealing plate; the part of the second sealing plate located in the inner pipe is provided with at least one mixed gas extraction pipe; The part of the second sealing plate between the inner pipe and the outer pipe is provided with at least one mixed gas outlet pipe; each mixed gas outlet pipe is communicated with the outer pipe or the inner pipe, and each mixed gas outlet pipe passes through a corresponding conveying hose. The tube communicates with the combustion chamber.

By arranging the first sealing plate and the second sealing plate, the two ends of the inner tube and the outer tube are respectively closed, the inner space of the inner tube is mainly used for the circulation of liquefied petroleum gas, and the annular space between the inner tube and the outer tube is mainly used for the circulation of liquefied petroleum gas. It is suitable for circulating low-concentration gas; by setting a through hole 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 hole on the side wall of the inner pipe, and mixes with the low-concentration gas; Through holes are arranged on the partition plate, so that the partition plate itself can slow down the flow rate of liquefied petroleum gas, provide enough time for the diffusion of liquefied petroleum gas, and reduce the consumption of liquefied petroleum gas; by setting the mixed gas outlet pipe , so that the liquefied petroleum gas in the inner pipe and the mixed gas in the annular cavity are led out of the gas mixing assembly, and delivered to the combustion chamber through the delivery hose.

Further, the air intake assembly includes a liquefied petroleum gas intake pipe and at least two low-concentration gas intake pipes; the liquefied petroleum gas intake pipe is installed on the first sealing plate, and the gas outlet of the liquefied petroleum gas intake pipe is located in the inner pipe; all The low-concentration gas intake pipe is uniformly installed on the first sealing plate circumferentially around the center line of the inner pipe, and the gas outlet of each low-concentration gas intake pipe is located between the outer pipe and the inner pipe.

By setting 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 setting the low concentration gas inlet pipe, the annular cavity between the inner pipe and the outer pipe is formed It communicates with the low-concentration gas source through the low-concentration gas intake pipe.

Further, the combustion chamber as a whole is a cylindrical body, and a cavity for gas combustion is arranged inside the cylindrical body. The other end of the combustion chamber is provided with the same number of combustion chamber intake pipes as the delivery hoses, and each combustion chamber intake pipe is communicated with the cavity of the combustion chamber.

By arranging the combustion chamber air intake pipe, the conveying hose and the combustion chamber cavity are communicated through the combustion chamber air intake pipe; by arranging the combustion chamber cavity, a combustion place is provided for the mixed gas.

Further, two cooling air ducts are installed on the outer side wall of the combustion chamber, and the two cooling air ducts communicate with the cavity of the combustion chamber and are located on both sides of the combustion chamber.

By arranging two cooling air ducts, the cooling air enters the combustion chamber cavity through the cooling air ducts, and the heat and exhaust gas generated by the combustion of the mixed gas are discharged through the outlet of the combustion chamber.

Further, an ignition duct is installed on the outer side wall of the combustion chamber, and the igniter can be installed in the ignition duct.

By arranging the ignition pipeline, the igniter can be installed in the ignition pipeline, and the igniter can ignite the mixed gas in the combustion chamber cavity to ensure the combustion of the mixed gas.

Further, an observation window is provided on the combustion chamber.

By setting the observation window, the user can observe whether the combustion chamber is ignited successfully and whether the combustion is stable through the observation window.

The beneficial effects of the present utility model are:

1. By setting the gas mixing component, the low-concentration gas and liquefied petroleum gas are mixed to form a mixed gas; the mixed gas is transported to the combustion chamber through the conveying hose for combustion; due to the high calorific value of the liquefied petroleum gas, it is easy to burn stably, and Low-concentration gas has a low calorific value and is not easy to burn, so by setting a gas mixing component to mix the two gases, the high-calorific LPG can strengthen the combustion of low-calorific low-concentration gas, so that low-concentration gas can burn stably ; Therefore, through the combustion method, the low-concentration coal mine gas produced in the coal mining process is treated, and the emission of low-concentration coal mine gas is reduced.

Description of drawings

Figure 1 shows a schematic diagram of the overall structure of the present invention.

Figure 2 shows a schematic diagram of the installation position of the inner tube and the divider plate.

Parts, components and numbers in the picture: intake assembly 1, outer pipe 2, mixed gas outlet pipe 3, delivery hose 4, combustion chamber intake pipe 5, ignition pipe 6, observation window 7, cooling air pipe 8, combustion chamber Outlet 9 , combustion chamber 10 , inner pipe 11 , partition plate 12 .

Detailed ways

The specific implementation methods of the invention are given below, and the technical solutions of the present invention are described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1:

As shown in FIG. 1 , a low-concentration gas combustion device includes an intake assembly 1 , a gas mixing assembly and a combustion chamber 10 , the intake assembly 1 is communicated with the gas mixing assembly, and the gas mixing assembly and the combustion chamber 10 pass through a delivery hose 4 Communication; low-concentration gas and liquefied petroleum gas pass through the intake assembly 1, enter the gas mixing assembly, and are mixed in the gas mixing assembly, and the mixed gas is transported to the combustion chamber 10 through the delivery hose 4 for combustion.

As shown in FIG. 2 , 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 arranged coaxially. The two ends are respectively closed by the first sealing plate and the second sealing plate. Thirteen partition plates 12 are arranged in the inner tube 11 at intervals along the length direction of the inner tube 11. On the side wall of the inner tube 11 and each partition plate 12 are provided with a number of through holes; an air intake assembly 1 is installed on the outside of the first sealing plate, and the low-concentration gas enters the annular cavity between the inner pipe 11 and the outer pipe 2 through the air intake assembly 1; liquefied petroleum gas passes through The air intake assembly 1 enters the inner pipe 11, and 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 hole on the side wall of the inner pipe, and is mixed with the low-concentration gas. Mixing; another part of the liquefied petroleum gas in the inner pipe 11 flows through the through holes on the partition plate 12 along the length direction of the inner pipe 11 to the side where the second sealing plate is located; the outside of the second sealing plate is installed with three mixed gas Outlet pipe 3; the part of the second sealing plate located in the inner pipe 11 is provided with a mixed gas outlet pipe 3; the 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 , the two mixed gas outlet pipes 3 are evenly installed on the second sealing plate circumferentially 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 delivery hose 4 .

As shown in Figure 1, the air intake assembly 1 includes a liquefied petroleum gas intake pipe and two low-concentration gas intake pipes; the liquefied petroleum gas intake pipe is installed on the first sealing plate, and the gas outlet of the liquefied petroleum gas intake pipe is located in the inner pipe ; All low-concentration gas inlet pipes are evenly installed on the first sealing plate circumferentially 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.

As shown in FIG. 1 , the combustion chamber 10 as a whole is a cylindrical body, and the interior of the cylindrical body has a cavity for gas combustion. One end of the combustion chamber 10 is tapered, and the end of the end is provided with an opening, which is connected to the combustion chamber. The cavity of the combustion chamber is connected and used as the combustion chamber outlet 9; the other end of the combustion chamber 10 is provided with the same number of combustion chamber intake pipes 5 as the delivery hoses 4, and each combustion chamber intake pipe 5 is communicated with the cavity of the combustion chamber 10. .

As shown in FIG. 1 , 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 8 It communicates with the fan through a ventilation duct, and the fan supplies air into the combustion chamber 10 through the ventilation duct and the cooling air duct 8. In this embodiment, the model of the fan is SC-75SA.

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

The combustion chamber 10 is provided with an observation window 7, and a fire observation pipe is installed on the outer side wall of the combustion chamber 10. The fire observation pipe is communicated with the cavity of the combustion chamber. The fire observation pipe is made of alloy steel material. The glass used for observing the combustion inside the combustion chamber, the glass and the fire observation pipe constitute the observation window 7 of the combustion chamber.

How to use: First ignite through the igniter, and then pass the low-concentration gas and LPG into the gas mixing component. In the gas mixing component, the low-concentration gas and The mixed gas is sent into the combustion chamber through the delivery hose for combustion, and the observation window 7 is used to confirm whether the mixed gas is ignited successfully and can burn stably, and then the cooling air is introduced to discharge the heat and exhaust gas. The low-concentration coal mine methane produced in the process reduces the emission of low-concentration coal mine methane.

Taking the above ideal embodiment according to the present invention as inspiration, through the above description, relevant staff can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present utility model is not limited to the contents in the description, and its technical scope must be determined according to the scope of the claims.

Claims (7)

1. The low-concentration gas combustion device is characterized by comprising an air inlet assembly (1), a gas mixing assembly and a combustion chamber (10), wherein the air inlet assembly (1) is communicated with the gas mixing assembly, and the gas mixing assembly is communicated with the combustion chamber (10) through a conveying hose (4);

the low-concentration gas and the liquefied petroleum gas enter the gas mixing assembly through the gas inlet assembly (1) and are mixed in the gas mixing assembly, and the mixed gas is conveyed into the combustion chamber (10) through the conveying hose (4) to be combusted.

2. The low-concentration gas combustion device as claimed in claim 1, wherein the gas mixing assembly comprises 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 coaxially arranged, two ends of the inner tube (11) and two ends of the outer tube (2) are respectively sealed by the first sealing plate and the second sealing plate, a plurality of partition plates (12) are arranged in the inner tube (11) at intervals along the length direction of the inner tube (11), and a plurality of through holes are formed in the side wall of the inner tube (11) and each partition plate (12);

an air inlet assembly (1) is installed on the outer side of the first sealing plate, and low-concentration gas enters an annular cavity between the inner pipe (11) and the outer pipe (2) through the air inlet assembly (1);

liquefied petroleum gas enters the inner pipe (11) through the air inlet assembly (1), and a part of the liquefied petroleum gas in the inner pipe (11) can be diffused into an annular cavity between the inner pipe (11) and the outer pipe (2) through a through hole in the side wall of the inner pipe to be mixed with low-concentration gas; the other part of the liquefied petroleum gas in the inner pipe (11) flows to one side of the second sealing plate along the length direction of the inner pipe (11) through the through hole on the partition plate (12);

at least two mixed gas outlet pipes (3) are arranged on the outer side of the second sealing plate; the part of the second sealing plate, which is positioned in the inner pipe (11), is provided with at least one mixed gas outlet pipe (3); the part of the second sealing plate, which is positioned between the inner pipe (11) and the outer pipe (2), is provided with at least one mixed gas outlet pipe (3); each mixed gas eduction tube (3) is communicated with the outer tube (2) or the inner tube (11), and each mixed gas eduction tube (3) is communicated with the combustion chamber (10) through a corresponding conveying hose (4).

3. A low-concentration gas combustion apparatus as claimed in claim 2, wherein the air intake assembly (1) comprises a liquefied petroleum gas intake pipe and at least two low-concentration gas intake pipes;

the liquefied petroleum gas inlet pipe is arranged on the first sealing plate, and the gas outlet of the liquefied petroleum gas inlet pipe is positioned in the inner pipe;

all low concentration gas intake pipes, the even installation on first shrouding of central line circumference around the inner tube, the gas outlet of every low concentration gas intake pipe all is located between outer tube and the inner tube.

4. A low-concentration gas combustion device according to claim 3, wherein the combustion chamber (10) is a cylindrical body as a whole, a cavity for gas combustion is formed inside the cylindrical body, one end of the combustion chamber (10) is tapered, and an opening is formed at the end of the tapered end, is communicated with the cavity of the combustion chamber and is used as the combustion chamber outlet (9);

the other end of the combustion chamber (10) is provided with combustion chamber air inlet pipes (5) with the same number as the conveying hoses (4), and the cavity of each combustion chamber air inlet pipe (5) is communicated with the cavity of the combustion chamber (10).

5. A low-concentration gas combustion device as claimed in claim 4, wherein two cooling air pipes (8) are installed on the outer side wall of the combustion chamber (10), and the two cooling air pipes (8) are communicated with the cavity of the combustion chamber (10) and are positioned at two sides of the combustion chamber (10).

6. A low-concentration gas combustion apparatus as defined in claim 5, wherein an ignition tube (6) is installed on an outer side wall of the combustion chamber (10), and the igniter is installed in the ignition tube (6).

7. A low-concentration gas combustion device as claimed in claim 6, wherein the combustion chamber (10) is provided with a viewing window (7).

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