Impurity screening mechanism of anti-explosion catalytic combustion equipment

Abstract

The utility model relates to the technical field of waste gas filtering equipment, in particular to an impurity screening mechanism of anti-explosion catalytic combustion equipment, which comprises a vertically arranged screening pipe, and a gas inlet switching mechanism and a gas outlet switching mechanism are arranged on one side of the screening pipe. The gas inlet switching mechanism comprises a gas inlet spherical shell, a rotatable gas inlet switching ball valve is arranged in the gas inlet spherical shell, the interior of the gas inlet switching ball valve is hollow, and the top of the gas inlet spherical shell is fixedly connected with a waste gas inlet pipe. When the filter screen needs to be detached for impurity cleaning, the waste gas inlet pipe and the waste gas outlet pipe can be closed, meanwhile, the nitrogen inlet pipe and the waste gas treatment pipe are communicated, nitrogen is filled into the screening pipe where the filter screen is located to replace combustible gas in the screening pipe, and it is avoided that when the screening pipe is opened and the filter screen is taken out for impurity cleaning, the filter screen is damaged. Explosions are caused by electrostatic sparks.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas filtering equipment, in particular to an impurity screening mechanism of an explosion-proof catalytic combustion device. Background Technique

[0002] The catalytic combustion device can make the organic waste gas burn without flame at a lower ignition temperature with the help of a catalyst, and decompose the organic waste gas into non-toxic carbon dioxide and water vapor. When using the catalytic combustion device, a pre-filtering device is required to screen out impurities in the waste gas.

[0003] In order to ensure the impurity screening performance, the pre-filter of the catalytic combustion device is usually designed to be detachable, which is convenient for disassembling the filter screen to clean the impurities on the surface of the filter screen. For example, the explosion-proof catalytic combustion device proposed in the patent application number "CN202020936616.0" includes a base, a catalytic combustion box is arranged at the upper end of the base, a connecting pipe is arranged on one side of the catalytic combustion box, a filter box is arranged at one end of the connecting pipe, and a detachable sieve plate is arranged inside the filter box.

[0004] However, in the above patent application, it is necessary to open the filter box to disassemble the filter plate and clean the impurities on the filter plate. However, during the waste gas transportation process, the waste gas passes through the filter box. Even if the waste gas transportation stops, there is still residual waste gas inside the filter box. When the filter box is opened and the filter plate is taken out, the combustible gas in the waste gas may be exploded due to static sparks, affecting the safety of the equipment. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an impurity screening mechanism of an explosion-proof catalytic combustion device to solve the problems raised in the above background technique.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] An impurity screening mechanism of an explosion-proof catalytic combustion device includes a vertically arranged sieve pipe, and an air inlet switching mechanism and an air outlet switching mechanism are arranged on one side of the sieve pipe;

[0008] The air inlet switching mechanism includes an air inlet spherical shell, a rotatable air inlet switching ball valve is arranged inside the air inlet spherical shell, the air inlet switching ball valve is hollow inside, an exhaust gas inlet pipe is fixedly connected to the top of the air inlet spherical shell, a nitrogen inlet pipe is fixedly connected to the bottom of the air inlet spherical shell, an air inlet connecting pipe is fixedly connected to one side of the air inlet spherical shell, one end of the air inlet connecting pipe is fixedly connected to the sieve pipe, and air inlet through holes are arranged at the top and one side of the air inlet switching ball valve for connecting the air inlet connecting pipe and the exhaust gas inlet pipe.

[0009] Preferably, the air outlet switching mechanism includes an air outlet spherical shell. An air outlet switching ball valve that can rotate is arranged inside the air outlet spherical shell. The inside of the air outlet switching ball valve is hollow. A waste gas treatment pipe is fixedly connected to the top of the air outlet spherical shell, and a waste gas outlet pipe is fixedly connected to the bottom of the air outlet spherical shell. An air outlet connecting pipe is fixedly connected to one side of the air outlet spherical shell. One end of the air outlet connecting pipe is fixedly connected to the screening pipe. Air outlet through holes are formed in the bottom and one side of the air outlet switching ball valve for connecting the air outlet connecting pipe and the waste gas outlet pipe.

[0010] Preferably, a first servo motor and a second servo motor are respectively installed on the outer sides of the air inlet spherical shell and the air outlet spherical shell;

[0011] The output end of the first servo motor extends into the air inlet spherical shell and is fixedly connected to the air inlet switching ball valve;

[0012] The output end of the second servo motor extends into the air outlet spherical shell and is fixedly connected to the air outlet switching ball valve.

[0013] Preferably, a large-aperture filter screen and a small-aperture filter screen are arranged inside the screening pipe, and the large-aperture filter screen is arranged above the small-aperture filter screen.

[0014] Preferably, a threaded sleeve is threadedly connected to the top of the screening pipe. A closed top cover is fixedly connected to the top of the threaded sleeve. A vertical connecting rod is fixedly connected to the bottom of the threaded sleeve. The large-aperture filter screen and the small-aperture filter screen are both fixedly connected to the vertical connecting rod.

[0015] Preferably, fitting rings are fixedly connected to the outer surfaces of the large-aperture filter screen and the small-aperture filter screen, and the fitting rings are in fit with the inner wall of the screening pipe.

[0016] The beneficial effects of the present utility model:

[0017] Through the switching of the air inlet switching mechanism and the air outlet switching mechanism, the present utility model can close the waste gas inlet pipe and the waste gas outlet pipe when it is necessary to disassemble the filter screen for impurity cleaning, and at the same time connect the nitrogen inlet pipe and the waste gas treatment pipe, and fill nitrogen into the screening pipe where the filter screen is located to replace the combustible gas inside the screening pipe, so as to avoid explosion caused by electrostatic sparks when opening the screening pipe and taking out the filter screen for impurity cleaning, and ensure the safety of the impurity screening mechanism. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts;

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is the present utility model Figure 1 a sectional view of the sieve pipe;

[0021] Figure 3 is the present utility model Figure 2 a schematic diagram of the structure of the intake air switching mechanism part;

[0022] Figure 4 is the present utility model Figure 2 a schematic diagram of the structure of the exhaust air switching mechanism part.

[0023] The reference numerals in the figure are as follows:

[0024] 1, sieve pipe; 101, limiting ring; 2, large-aperture filter screen; 3, small-aperture filter screen; 4, intake air switching mechanism; 401, intake spherical shell; 402, intake switching ball valve; 403, waste gas inlet pipe; 404, nitrogen inlet pipe; 405, intake connecting pipe; 406, intake through hole; 5, exhaust air switching mechanism; 501, exhaust spherical shell; 502, exhaust switching ball valve; 503, waste gas treatment pipe; 504, waste gas outlet pipe; 505, exhaust connecting pipe; 506, exhaust through hole; 6, first servo motor; 7, second servo motor; 8, threaded sleeve; 9, closed top cover; 10, vertical connecting rod; 11, fitting ring. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0026] As Figure 1 , an impurity screening mechanism of an explosion-proof catalytic combustion device includes a vertically arranged sieve pipe 1, and the sieve pipe 1 is fixed on an external mechanism for use. An intake air switching mechanism 4 and an exhaust air switching mechanism 5 are arranged on one side of the sieve pipe 1, and the intake air switching mechanism 4 is located above the exhaust air switching mechanism 5;

[0027] As Figure 1 , Figure 2 and Figure 3, the intake air switching mechanism 4 includes a spherical intake housing 401. Inside the spherical intake housing 401, there is a rotatable intake switching ball valve 402. The surface of the intake switching ball valve 402 is in close contact with the inner wall of the spherical intake housing 401. The inside of the intake switching ball valve 402 is hollow. At the top of the spherical intake housing 401, there is a fixed connection with an exhaust gas inlet pipe 403, and the exhaust gas inlet pipe 403 is connected to an external exhaust gas input device. At the bottom of the spherical intake housing 401, there is a fixed connection with a nitrogen inlet pipe 404, and the nitrogen inlet pipe 404 is connected to an external nitrogen intake device. On one side of the spherical intake housing 401, there is a fixed connection with an intake connection pipe 405. One end of the intake connection pipe 405 is fixedly connected to the screening pipe 1. At the top and one side of the intake switching ball valve 402, there are intake through holes 406 for connecting the intake connection pipe 405 and the exhaust gas inlet pipe 403. The intake through holes 406 are connected to the hollow inside of the intake switching ball valve 402, and the hollow structure enhances the air flow capacity and reduces turbulence.

[0028] As Figure 1 , Figure 2 and Figure 4 , the exhaust gas switching mechanism 5 includes a spherical exhaust gas housing 501. Inside the spherical exhaust gas housing 501, there is a rotatable exhaust gas switching ball valve 502. The surface of the exhaust gas switching ball valve 502 is in close contact with the inner wall of the spherical exhaust gas housing 501. The inside of the exhaust gas switching ball valve 502 is hollow. At the top of the spherical exhaust gas housing 501, there is a fixed connection with an exhaust gas treatment pipe 503, and the exhaust gas treatment pipe 503 is connected to an external exhaust gas treatment device, which can treat the exhaust gas (such as recycling and inputting it into the screening pipe 1 through the exhaust gas inlet pipe 403 again for screening and then entering an external explosion-proof catalytic combustion device for treatment). At the bottom of the spherical exhaust gas housing 501, there is a fixed connection with an exhaust gas outlet pipe 504. On one side of the spherical exhaust gas housing 501, there is a fixed connection with an exhaust gas connection pipe 505. One end of the exhaust gas connection pipe 505 is fixedly connected to the screening pipe 1. At the bottom and one side of the exhaust gas switching ball valve 502, there are exhaust gas through holes 506 for connecting the exhaust gas connection pipe 505 and the exhaust gas outlet pipe 504.

[0029] The exhaust gas outlet pipe 504 is used to connect to an external explosion-proof catalytic combustion device to transport the exhaust gas after screening impurities to the external explosion-proof catalytic combustion device, and with the help of a catalyst in the external device, the organic exhaust gas undergoes flameless combustion at a lower ignition temperature, decomposing the organic exhaust gas into non-toxic carbon dioxide and water vapor.

[0030] As Figures 1 - 4 , on the outer sides of the spherical intake housing 401 and the spherical exhaust gas housing 501, a first servo motor 6 and a second servo motor 7 are respectively installed. The first servo motor 6 and the second servo motor 7 are both externally powered and can be independently controlled respectively;

[0031] The output end of the first servo motor 6 extends into the interior of the air inlet spherical housing 401 and is fixedly connected to the air inlet switching ball valve 402;

[0032] The output end of the second servo motor 7 extends into the interior of the air outlet spherical housing 501 and is fixedly connected to the air outlet switching ball valve 502.

[0033] As Figure 1 and Figure 2 shown, a large-aperture filter screen 2 and a small-aperture filter screen 3 are arranged inside the sieve pipe 1. The large-aperture filter screen 2 is arranged above the small-aperture filter screen 3, which can achieve hierarchical filtration of impurities in the waste gas. The filtration accuracy of the large-aperture filter screen 2 is 100 microns, intercepting large-particle impurities, and the filtration accuracy of the small-aperture filter screen 3 is 30 microns, intercepting small-particle impurities, reducing the probability of the internal filtration mechanism of the sieve pipe 1 being blocked.

[0034] As Figure 1 and Figure 2 shown, a threaded sleeve 8 is threadedly connected to the top of the sieve pipe 1. The top of the sieve pipe 1 is correspondingly provided with internal threads, and the surface of the threaded sleeve 8 has external threads. The top of the threaded sleeve 8 is fixedly connected to a closed top cover 9, and the bottom of the threaded sleeve 8 is fixedly connected to a vertical connecting rod 10. Both the large-aperture filter screen 2 and the small-aperture filter screen 3 are fixedly connected to the vertical connecting rod 10, so that by rotating the closed top cover 9, the large-aperture filter screen 2 and the small-aperture filter screen 3 can be driven to move up or down through the vertical connecting rod 10, facilitating the installation or disassembly of the large-aperture filter screen 2 and the small-aperture filter screen 3 for impurity cleaning.

[0035] There is a limiting ring 101 inside the sieve pipe 1, which can provide support for the small-aperture filter screen 3.

[0036] As Figure 1 and Figure 2 shown, a fitting ring 11 is fixedly connected to the outer surfaces of both the large-aperture filter screen 2 and the small-aperture filter screen 3. The fitting ring 11 is in fit with the inner wall of the sieve pipe 1. The fitting ring 11 can form a receiving space above the large-aperture filter screen 2 and the small-aperture filter screen 3, making it easier for the filtered impurities to move up with the large-aperture filter screen 2 and the small-aperture filter screen 3, facilitating impurity cleaning.

[0037] The working principle of the impurity screening mechanism of an explosion-proof catalytic combustion device provided by the present utility model is as follows:

[0038] As Figures 1 - 4 shown, the two air inlet through holes 406 are aligned with the waste gas inlet pipe 403 and the air inlet connecting pipe 405. External waste gas can enter the interior of the air inlet switching ball valve 402 through the waste gas inlet pipe 403, then enter the air inlet connecting pipe 405 from the interior of the air inlet switching ball valve 402, and then enter the sieve pipe 1;

[0039] After the waste gas passes through the large-aperture filter screen 2 and the small-aperture filter screen 3 inside the sieve tube 1, the particulate impurities in the gas are screened out and enter the outlet switching ball valve 502 through the air outlet connecting pipe 505 (the two air outlet through holes 506 of the outlet switching ball valve 502 are respectively aligned with the air outlet connecting pipe 505 and the waste gas outlet pipe 504), and then are input into the external explosion-proof catalytic combustion equipment through the waste gas outlet pipe 504 for waste gas treatment;

[0040] When it is necessary to take out the large-aperture filter screen 2 and the small-aperture filter screen 3 inside the sieve tube 1 for impurity cleaning, control the first servo motor 6 to drive the intake switching ball valve 402 to rotate counterclockwise, so that the two intake through holes 406 of the intake switching ball valve 402 are respectively aligned with the intake connecting pipe 405 and the nitrogen inlet pipe 404, and the second servo motor 7 drives the outlet switching ball valve 502 to rotate clockwise, so that the two outlet through holes 506 of the outlet switching ball valve 502 are respectively aligned with the outlet connecting pipe 505 and the waste gas treatment pipe 503;

[0041] At this time, the external nitrogen intake device can input nitrogen into the intake switching ball valve 402 through the nitrogen inlet pipe 404, and then into the sieve tube 1 through the intake connecting pipe 405. The nitrogen is used to displace the waste gas inside the sieve tube 1. The displaced waste gas and the excess nitrogen enter the outlet switching ball valve 502 through the outlet connecting pipe 505, and then are input into the external waste gas treatment equipment through the waste gas treatment pipe 503 for waste gas treatment.

[0042] Compared with the related technology, the impurity screening mechanism of an explosion-proof catalytic combustion device provided by the present utility model has the following beneficial effects:

[0043] By switching the intake switching mechanism 4 and the outlet switching mechanism 5, the present utility model can close the waste gas inlet pipe 403 and the waste gas outlet pipe 504 when it is necessary to disassemble the filter screen for impurity cleaning, and at the same time connect the nitrogen inlet pipe 404 and the waste gas treatment pipe 503, and fill nitrogen into the sieve tube 1 where the filter screen is located to displace the combustible gas inside the sieve tube 1, avoiding explosion caused by electrostatic sparks when opening the sieve tube 1 to take out the filter screen for impurity cleaning, and ensuring the safety of the impurity screening mechanism.

[0044] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. An impurity screening mechanism for an explosion-proof catalytic combustion device, comprising a vertically arranged screening pipe (1), characterized in that, On one side of the sieve pipe (1), an air inlet switching mechanism (4) and an air outlet switching mechanism (5) are provided; The air inlet switching mechanism (4) includes an air inlet spherical shell (401). Inside the air inlet spherical shell (401), a rotatable air inlet switching ball valve (402) is arranged. The air inlet switching ball valve (402) is hollow inside. At the top of the air inlet spherical shell (401), an exhaust gas inlet pipe (403) is fixedly connected. At the bottom of the air inlet spherical shell (401), a nitrogen inlet pipe (404) is fixedly connected. On one side of the air inlet spherical shell (401), an air inlet connecting pipe (405) is fixedly connected. One end of the air inlet connecting pipe (405) is fixedly connected to the sieve pipe (1). Air inlet through holes (406) are formed at the top and one side of the air inlet switching ball valve (402) for connecting the air inlet connecting pipe (405) and the exhaust gas inlet pipe (403).

2. The impurity screening mechanism of an explosion-proof catalytic combustion device according to claim 1, characterized in that, The air outlet switching mechanism (5) includes an air outlet spherical shell (501). Inside the air outlet spherical shell (501), a rotatable air outlet switching ball valve (502) is arranged. The air outlet switching ball valve (502) is hollow inside. At the top of the air outlet spherical shell (501), an exhaust gas treatment pipe (503) is fixedly connected. At the bottom of the air outlet spherical shell (501), an exhaust gas outlet pipe (504) is fixedly connected. On one side of the air outlet spherical shell (501), an air outlet connecting pipe (505) is fixedly connected. One end of the air outlet connecting pipe (505) is fixedly connected to the sieve pipe (1). Air outlet through holes (506) are formed at the bottom and one side of the air outlet switching ball valve (502) for connecting the air outlet connecting pipe (505) and the exhaust gas outlet pipe (504); The exhaust gas outlet pipe (504) is used to connect to an external explosion-proof catalytic combustion device to convey the exhaust gas after screening impurities to the external explosion-proof catalytic combustion device.

3. The impurity screening mechanism of an explosion-proof catalytic combustion device according to claim 2, characterized in that, A first servo motor (6) and a second servo motor (7) are respectively installed on the outer sides of the air inlet spherical shell (401) and the air outlet spherical shell (501); The output end of the first servo motor (6) extends into the air inlet spherical shell (401) and is fixedly connected to the air inlet switching ball valve (402); The output end of the second servo motor (7) extends into the air outlet spherical shell (501) and is fixedly connected to the air outlet switching ball valve (502).

4. The impurity screening mechanism of an explosion-proof catalytic combustion device according to claim 1, characterized in that Inside the sieve pipe (1), a large-aperture filter screen (2) and a small-aperture filter screen (3) are arranged, and the large-aperture filter screen (2) is arranged above the small-aperture filter screen (3).

5. The impurity screening mechanism of an explosion-proof catalytic combustion device according to claim 4, characterized in that, A threaded sleeve (8) is threadedly connected to the top of the sieve pipe (1). At the top of the threaded sleeve (8), a closed top cover (9) is fixedly connected. At the bottom of the threaded sleeve (8), a vertical connecting rod (10) is fixedly connected. Both the large-aperture filter screen (2) and the small-aperture filter screen (3) are fixedly connected to the vertical connecting rod (10).

6. The impurity screening mechanism of an explosion-proof catalytic combustion device according to claim 4, characterized in that, Fitting rings (11) are fixedly connected to the outer surfaces of the large-aperture filter screen (2) and the small-aperture filter screen (3), and the fitting rings (11) are in fit with the inner wall of the sieve pipe (1).

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