Combustion purification device for heat treatment combustible waste gas

Abstract

The utility model relates to a heat treatment combustible waste gas combustion purification device which comprises a combustion cylinder and is characterized in that one end of the combustion cylinder is communicated with a gas inlet pipe, and the other end of the combustion cylinder is communicated with an exhaust pipe; an ignition assembly used for igniting combustible waste gas is arranged in the combustion cylinder. A metal ring is arranged in the combustion cylinder and located above the ignition assembly. According to the combustion purification device, flames in the combustion cylinder can be combusted more uniformly, sufficient combustion of combustible waste gas is promoted, and therefore the combustion effect of the combustion purification device is enhanced; and meanwhile, the emission amount of the treated waste gas is effectively reduced, so that the pollution and danger of the waste gas to the environment are greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas combustion, and in particular to a device for heat treating combustible waste gas combustion and purification. Background Art

[0002] Industrial waste gas emitted by semiconductor processes inevitably contains flammable waste gas such as hydrogen. If these flammable waste gas is directly discharged without treatment, it will not only cause serious harmful pollution to the environment, but also bring great safety hazards to people. Therefore, flammable waste gas treatment equipment is usually set up to treat the flammable waste gas in these industrial waste gases.

[0003] The patent document with publication number CN201925935U discloses a combustible exhaust gas combustion device, including a nozzle, a flame stabilizing tube and an ignition-flame detection electrode, the nozzle of the nozzle extends into the interior of the flame stabilizing tube, a porous plate is installed near the top of the flame stabilizing tube, and a plurality of air inlet holes are opened on the side wall of the flame stabilizing tube, the ignition-flame detection electrode is used to discharge and ignite the combustion mixture in the flame stabilizing tube, and detect the combustion flame; when the exhaust gas is burned by the device, since the porous plate and the air inlet holes are directly connected to the outside world, when a large amount of combustible exhaust gas enters the air inlet pipe at one time, part of the combustible exhaust gas may be directly discharged to the outside world through the porous plate or the air inlet holes, which makes it impossible for these combustible exhaust gases to be fully burned, resulting in poor combustion effect. Utility Model Content

[0004] In order to ensure as much as possible that the combustible waste gas in the combustible waste gas combustion device can be fully burned to improve the combustion effect, the present application provides a thermal treatment combustible waste gas combustion purification device.

[0005] The present application provides a thermal treatment combustible waste gas combustion purification device adopts the following technical solution:

[0006] A device for heat treating combustible waste gas combustion and purification comprises a combustion cylinder, one end of which is connected to an air intake pipe, and the other end is connected to an exhaust pipe; an ignition assembly for igniting combustible waste gas is provided in the combustion cylinder; a metal ring is provided in the combustion cylinder, and the metal ring is located above the ignition assembly.

[0007] By adopting the above technical solution, when in use, the combustible exhaust gas enters the combustion tube through the air inlet of the intake pipe and mixes with the air in the combustion tube, and the mixed gas in the combustion tube is ignited by the ignition component; at this time, the combustion of the mixed gas increases the temperature of the metal ring in the combustion tube, and the red-burned metal ring has a high temperature and can also ignite the combustible exhaust gas in the combustion tube. At the same time, the metal ring well guarantees the ambient temperature in the combustion tube during the process, thereby improving the combustion stability of the flame to a certain extent;

[0008] When a large amount of combustible waste gas enters the intake pipe at one time, the metal ring can serve as a secondary ignition source to ignite part of the combustible waste gas that has not been burned immediately after entering the combustion tube, so that the combustible waste gas entering the combustion tube can be fully burned, thereby enhancing the combustion effect of the combustion purification device;

[0009] In addition, the combustion purification device can effectively reduce the emission of waste gas that is not fully burned, thereby greatly reducing the pollution and danger caused by the waste gas to the environment.

[0010] In a specific possible implementation scheme, the ignition assembly includes an ignition burner disposed in the combustion tube, one end of the ignition burner is connected to a delivery pipe, and one end of the delivery pipe extending out of the combustion tube is connected to a gas storage tank; the metal ring is located above the ignition burner.

[0011] In a specific feasible implementation scheme, the end of the ignition burner away from the delivery pipe is connected to a fire outlet circular plate, and the outer wall of the fire outlet circular plate is connected to the inner wall of the combustion tube; a cavity is opened in the fire outlet circular plate, and the cavity is connected to the delivery pipe; a plurality of fire outlet holes are provided on the upper surface of the fire outlet circular plate, and the fire outlet holes are all connected to the cavity.

[0012] By adopting the above technical solution, the natural gas in the transmission pipeline is ignited by the ignition burner after entering the cavity in the fire outlet circular plate, and the flame emerges through the fire outlet hole to ignite the combustible exhaust gas entering the combustion tube through the air inlet pipe. The flames emitted from several fire outlet holes on the fire outlet circular plate form an ignition zone in the combustion tube. The ignition zone forms a flame that burns more evenly, greatly improving the stability of flame combustion.

[0013] In a specific possible implementation manner, the metal ring is located above the fire-emitting circular plate and overlaps with the fire-emitting circular plate.

[0014] By adopting the above technical solution, the overlapping metal ring helps to improve the convenience of replacing the metal ring.

[0015] In a specific possible implementation manner, the air inlet pipe is inserted into the fire outlet circular plate and communicated with the cavity.

[0016] By adopting the above technical solution, the bottom wall of the fire-discharging circular plate isolates the air below, and a semi-enclosed space for waste gas combustion treatment is formed between the heat insulation cover and the bottom of the fire-discharging circular plate. The combustible waste gas in the air intake pipe can directly enter the space through the cavity for combustion and purification. The high temperature heat generated by the combustion keeps the heat insulation cover at a high temperature, and the residual combustible waste gas is ignited by the heat insulation cover during the rising process to be fully burned.

[0017] In a specific feasible implementation scheme, a heat insulation cover is provided in the combustion tube, and the outer side walls of the fire outlet circular plate and the metal ring are both in contact with the inner side wall of the heat insulation cover; a plurality of exhaust holes are provided on a surface of the heat insulation cover close to the exhaust pipe, and the exhaust holes are all connected to the exhaust pipe.

[0018] In a specific possible implementation manner, a flame detector electrically connected to the ignition burner is disposed in the combustion tube, and a detection head of the flame detector is inserted into the cavity.

[0019] By adopting the above technical solution, the flame detector helps to achieve self-detection and self-ignition of the flame in the combustion tube.

[0020] In a specific possible implementation manner, a solenoid valve is provided on the delivery pipeline, and the solenoid valve is located between the ignition burner and the exhaust pipe.

[0021] By adopting the above technical solution, when in use, the solenoid valve is controlled to open, and the natural gas in the gas storage tank enters the combustion tube through the delivery pipeline and the ignition burner in turn, mixes with the mixed gas in the combustion tube, and then the ignition burner ignites the mixed gas to burn and purify the waste gas. The setting of the solenoid valve allows personnel to remotely control the start and end of the waste gas treatment in the combustion chamber, without the need for personnel to be on site throughout the operation, which improves the convenience of using the combustible waste gas combustion purification device, thereby improving the treatment efficiency to a certain extent.

[0022] In a specific possible implementation manner, an exhaust pipe cover is provided on one end of the exhaust pipe close to the combustion tube.

[0023] By adopting the above technical solution, the exhaust duct cover can effectively slow down the heat loss in the combustion tube, so that more heat energy in the combustion is retained in the combustion tube, which helps to increase the temperature, promote more complete combustion, reduce the rate of temperature drop in the combustion tube, further reduce exhaust gas emissions, and be environmentally friendly.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The metal ring can ignite the rising combustible waste gas in the combustion tube. At the same time, the metal ring helps to maintain the ambient temperature in the combustion tube during the gas combustion process, thereby improving the combustion stability of the flame to a certain extent; in addition, the metal ring makes the flame in the combustion tube burn more evenly, promotes the full combustion of the combustible waste gas, and thus enhances the combustion effect of the combustion purification device;

[0026] 2. This application effectively reduces the emission of treated waste gas by enhancing the combustion effect of waste gas, thereby greatly reducing the pollution and danger caused by waste gas to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front view of a thermal treatment combustible waste gas combustion purification device according to an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view of a thermal treatment combustible waste gas combustion purification device according to an embodiment of the present application.

[0029] Figure 3 It is a front view of a thermal treatment combustible waste gas combustion purification device according to another embodiment of the present application.

[0030] Figure 4 It is a cross-sectional view of a thermal treatment combustible waste gas combustion purification device according to another embodiment of the present application.

[0031] Explanation of the accompanying reference numerals: 1. combustion tube; 11. combustion chamber; 2. air inlet pipe; 3. exhaust pipe; 4. ignition assembly; 41. ignition burner; 42. delivery pipe; 43. gas storage tank; 44. solenoid valve; 5. metal ring; 6. fire outlet circular plate; 61. fire outlet hole; 611. small hole; 612. medium hole; 613. large hole; 62. cavity; 7. exhaust pipe cover; 8. heat insulation cover; 81. exhaust hole; 9. flame detector. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0033] The embodiment of the present application discloses a device for heat treatment of combustible waste gas combustion purification.

[0034] Example 1

[0035] Reference Figure 1 A thermal treatment combustible waste gas combustion purification device includes a combustion tube 1, an air intake pipe 2, an exhaust pipe 3 and an ignition assembly 4. The combustion tube 1 of this embodiment takes a cylindrical combustion chamber as an example. The bottom of the combustion tube 1 is connected to the air intake pipe 2, and the upper part is connected to the exhaust pipe 3; the exhaust pipe 3 and the air intake pipe 2 of this embodiment are used to transport combustible waste gas. An exhaust pipe 3 cover is fixedly connected to one end of the exhaust pipe 3 close to the combustion tube 1. The exhaust pipe 3 cover can effectively slow down the heat loss in the combustion tube 1, promote more complete combustion, and further reduce exhaust gas emissions. When in use, heat is gathered in the semi-enclosed combustion tube 1 to form a high-temperature combustion zone, which helps the exhaust gas to be fully burned in the combustion chamber.

[0036] Reference Figure 2 A heat insulation cover 8 is provided in the combustion tube 1. In order to expand the space in the combustion chamber as much as possible, the outer wall of the heat insulation cover 8 is in contact with the inner wall of the combustion tube 1. The thickness of the heat insulation cover 8 in this embodiment is 1 mm. A plurality of exhaust holes 81 are provided on one surface of the heat insulation cover 8 close to the exhaust pipe 3, and the plurality of exhaust holes 81 are connected to the exhaust pipe 3.

[0037] Reference Figure 2 The ignition assembly 4 includes an ignition burner 41, a delivery pipeline 42, a solenoid valve 44 and a gas tank 43. The ignition burner 41 is fixedly connected to the inner wall of the middle part of the heat insulation cover 8; one end of the ignition burner 41 is connected to the delivery pipeline 42, and the end of the delivery pipeline 42 away from the ignition burner 41 is connected to the gas tank 43, and the gas tank 43 is arranged on one side of the combustion tube 1; the gas in the gas tank 43 in this embodiment takes natural gas as an example, and can also be any combustible gas such as coke oven gas, mixed coal gas, liquefied petroleum gas, etc. The solenoid valve 44 is fixedly connected to the delivery pipeline 42 and is located between the ignition burner 41 and the delivery pipeline 42, so that personnel can remotely control the combustion in the combustion tube 1 by controlling the switch of the natural gas solenoid valve 44 in the gas tank 43.

[0038] Reference Figure 2 In order to allow the natural gas entering the combustion tube 1 to be ignited in a concentrated manner to enhance the combustion effect, an end of the ignition burner 41 away from the delivery pipe 42 is fixedly connected to a fire circular plate 6, and the outer wall of the fire circular plate 6 is fixedly connected to the inner wall of the heat insulation cover 8; a cavity 62 is opened in the fire circular plate 6 and a plurality of fire holes 61 are provided on the upper surface of the fire circular plate 6, and the plurality of fire holes 61 are all connected to the cavity 62, and the cavity 62 is connected to the delivery pipe 42.

[0039] Reference Figure 2 One end of the gas outlet pipe located in the combustion tube 1 is inserted into the fire outlet circular plate 6 and communicated with the cavity 62, so that the combustible exhaust gas can be mixed with the concentrated natural gas in the cavity 62. After being ignited by the ignition burner 41, the formed flame emerges through a plurality of fire outlet holes 61, forming a flame layer in the middle of the combustion tube 1, which can ignite the combustible exhaust gas escaping from the fire outlet holes 61 for a second time, further contributing to the full combustion of the combustible exhaust gas.

[0040] Reference Figure 2 In order to make the flame in the combustion tube 1 burn evenly to improve the stability of the flame, a metal ring 5 is provided in the combustion tube 1. The metal ring 5 is located above the fire-outlet circular plate 6, and the outer wall of the metal ring 5 is in contact with the inner wall of the heat insulation cover 8; the metal ring 5 can be heated by the flame emitted from the fire-outlet hole 61, and the red-hot metal ring 5 can ignite the combustible waste gas that escapes from the fire-outlet hole 61 and is still in an ascending state for the third time, further contributing to the full combustion of the combustible waste gas. The metal ring 5 of this embodiment takes the overlapped cooperation with the fire-outlet circular plate 6 as an example, thereby improving the convenience of replacing the damaged metal ring 5.

[0041] The implementation principle of a thermal treatment combustible waste gas combustion purification device in the present application embodiment is:

[0042] When in use, the control solenoid valve 44 is opened, and the natural gas enters the cavity 62 and mixes with the air in the combustion tube 1. Then the combustible waste gas enters the cavity 62 through the air inlet of the intake pipe 2 and mixes with the mixed gas in the cavity 62. Then the ignition burner 41 ignites the mixed gas in the combustion tube 1 for the first time, and the flame emerges from the fire outlet 61 to ignite the combustible waste gas in the combustion tube 1 for the second time. At this time, the combustion of the mixed gas increases the temperature of the metal ring 5 in the combustion tube 1. The red-burned metal ring 5 has a high temperature, and the combustible waste gas escaping from the fire outlet 61 is ignited for the third time. The heat insulation cover 8 has a very high temperature under the combustion in the combustion tube 1, and the combustible waste gas that has passed through the metal ring 5 but has not been fully burned can be ignited again. Finally, the smoke generated by the combustion enters the exhaust pipe 3 through the exhaust hole 81 to complete the combustion.

[0043] Example 2

[0044] Reference Figure 3 When the air inlet pipe 2 is not straight, there will be a difference in gas flow rate when the combustible waste gas enters the combustion tube 1. In the actual combustion process, if the ratio between the combustible waste gas, air and the gas source used for ignition is not appropriate, it is easy to cause flame separation and fire failure, thereby affecting the actual combustion effect in the combustion tube 1. Therefore, the following settings are adopted:

[0045] Reference Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that the fire-emitting circular plate 6 is in the shape of an arc-shaped spherical surface that protrudes upward, so that an arc-shaped spherical flame that protrudes upward can be formed on the fire-emitting circular plate 6, which is convenient for igniting the combustible waste gas; in addition, the arc-shaped spherical surface of the fire-emitting circular plate 6 that protrudes upward also ensures that the fire-emitting circular plate 6 body can maintain the consistent upward expansion when it is heated, effectively avoiding the occurrence of irregular deformation of the fire-emitting circular plate 6 body.

[0046] Reference Figure 4The fire outlet holes 61 include small holes 611, middle holes 612 and large holes 613. To match the flow rate of the combustible waste gas, the apertures of the three holes are different. The combustible waste gas with a larger flow rate corresponds to the small hole 611, the combustible waste gas with a smaller flow rate corresponds to the large hole 613, and the combustible waste gas with a normal flow rate corresponds to the middle hole 612. The small holes 611, the middle holes 612 and the large holes 613 are arranged uniformly in the horizontal direction along the diameter of the main body of the fire outlet circular plate 6 in proportion. In this embodiment, the proportion of the three holes to the upper surface area of ​​the fire outlet circular plate 6 is 3:4:3 as an example. When the flow rate of the combustible exhaust gas in the exhaust pipe 3 is relatively high, the combustible exhaust gas passes through the small holes 611 in the outermost circle on the fire outlet circular plate 6. The obstruction and flow limiting of the small holes 611 effectively reduce the amount of combustible exhaust gas passing through. When the flow rate of the combustible exhaust gas in the exhaust pipe 3 is relatively low, the combustible exhaust gas passes through the large holes 613 in the innermost circle on the fire outlet circular plate 6. The large holes 613 have a larger diameter and can allow more combustible exhaust gas to pass through at the same time. In this way, the setting of three holes of different diameters helps to maintain the uniformity and stability of the flame by maintaining the size of the amount of combustible exhaust gas passing through to better ensure the sufficient combustion of the exhaust gas.

[0047] Reference Figure 4 The heat treatment combustible waste gas combustion purification device also includes a flame detector 9, the detection head of which is inserted into the cavity 62 to detect the flame condition in the combustion chamber; the flame detector 9 is electrically connected to the ignition burner 41 through a control system to achieve self-detection and self-ignition of the flame; when in use, if the flame combustion detector 9 detects that the flame in the combustion tube 1 is extinguished, the ignition burner 41 is controlled to be ignited again through a control system.

[0048] The implementation principle of Example 2 is:

[0049] When in use, the solenoid valve 44 is controlled to open, and the natural gas enters the cavity 62 and mixes with the air in the combustion tube 1. Then the combustible exhaust gas enters the cavity 62 through the air inlet of the intake pipe 2 and mixes with the mixed gas in the cavity 62. The ignition burner 41 ignites the mixed gas in the cavity 62, and the combustible gas with a faster flow rate passes through the small hole 611, the combustible gas with a slower flow rate passes through the large hole 613, and the combustible gas with a normal flow rate passes through the middle hole 612 to be fully burned in the combustion tube 1. Finally, the smoke generated by the combustion enters the exhaust pipe 3 through the exhaust hole 81 to complete the combustion.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for heat treating combustible waste gas combustion purification, comprising a combustion tube (1), characterized in that: One end of the combustion tube (1) is connected to an air intake pipe (2), and the other end is connected to an exhaust pipe (3); an ignition assembly (4) for igniting combustible waste gas is provided in the combustion tube (1); a metal ring (5) is provided in the combustion tube (1), and the metal ring (5) is located above the ignition assembly (4).

2. The device for heat treating combustible waste gas combustion purification according to claim 1, characterized in that: The ignition assembly (4) comprises an ignition burner (41) disposed in the combustion tube (1); one end of the ignition burner (41) is connected to a delivery pipe (42); one end of the delivery pipe (42) extending outside the combustion tube (1) is connected to a gas storage tank (43); and the metal ring (5) is located above the ignition burner (41).

3. The device for heat treating combustible waste gas combustion purification according to claim 2, characterized in that: One end of the ignition burner (41) away from the delivery pipe (42) is connected to a fire outlet circular plate (6), and the outer wall of the fire outlet circular plate (6) is connected to the inner wall of the combustion tube (1); a cavity (62) is provided in the fire outlet circular plate (6), and the cavity (62) is connected to the delivery pipe (42); a plurality of fire outlet holes (61) are provided on the upper surface of the fire outlet circular plate (6), and the fire outlet holes (61) are all connected to the cavity (62).

4. The device for heat treating combustible waste gas combustion purification according to claim 3, characterized in that: The metal ring (5) is located above the fire outlet circular plate (6) and overlaps with the fire outlet circular plate (6).

5. The device for heat treating combustible waste gas combustion purification according to claim 3, characterized in that: The air inlet pipe (2) is inserted into the fire outlet circular plate (6) and communicates with the cavity (62).

6. The device for heat treating combustible waste gas combustion purification according to claim 3, characterized in that: A heat insulation cover (8) is provided in the combustion tube (1), and the outer side walls of the fire outlet circular plate (6) and the metal ring (5) are both in contact with the inner side wall of the heat insulation cover (8); a plurality of exhaust holes (81) are provided on a surface of the heat insulation cover (8) close to the exhaust pipe (3), and the exhaust holes (81) are all connected to the exhaust pipe (3).

7. The device for heat treating combustible waste gas combustion purification according to claim 3, characterized in that: A flame detector (9) electrically connected to the ignition burner (41) is provided in the combustion tube (1), and a detection head of the flame detector (9) is inserted into the cavity (62).

8. The device for heat treating combustible waste gas combustion purification according to claim 2, characterized in that: The delivery pipeline (42) is provided with a solenoid valve (44), and the solenoid valve (44) is located between the ignition burner (41) and the exhaust pipe (3).

9. The device for heat treating combustible waste gas combustion purification according to claim 1, characterized in that: An exhaust pipe (3) cover is provided on one end of the exhaust pipe (3) close to the combustion tube (1).

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