Microwave catalytic cracking device for treating trichloroethylene waste gas

Abstract

The utility model discloses a microwave catalytic cracking device for treating trichloroethylene waste gas, and belongs to the field of trichloroethylene waste gas treatment devices. Comprising a cracking tank provided with a gas inlet for introducing waste gas and a gas outlet for discharging gas; the microwave catalysis box is arranged in the cracking tank; the filter layer is arranged on the side, close to the gas inlet, of the microwave catalysis box, and waste gas sequentially passes through the filter layer and the microwave catalysis box; the brush assembly comprises a rotating shaft barrel arranged in the cracking tank, and one end of the rotating shaft barrel penetrates through the filtering layer; the mounting plate is fixedly arranged in the cracking tank; the brush is arranged on the rotating shaft barrel; and the dust blocking piece is arranged directly facing the brush. The microwave catalytic cracking device for treating trichloroethylene waste gas has the beneficial effects that dust is prevented from directly entering the microwave catalytic box through the arranged filter layer, dust on the surface of the filter layer can be swept through the arranged brush and the arranged dust blocking piece, and dust can be removed through the arranged dust suction pipe; and dust gathered by the brush can be sucked away.

Description

TECHNICAL FIELD

[0001] The application relates to a trichloroethylene waste gas treatment device, in particular to a microwave catalytic cracking device for treating trichloroethylene waste gas. BACKGROUND

[0002] At present, the methods for treating trichloroethylene waste gas mainly include the following: absorption method, adsorption method, condensation method and cracking method. The cracking method usually adopts a catalytic cracking furnace to catalytically crack trichloroethylene waste gas. When the cracking furnace is used to treat waste gas, the waste gas containing chlorine is introduced into a microwave catalytic box for catalytic cracking. However, the existing cracking furnace causes the waste gas to pass through the microwave catalytic box for catalytic cracking. Since the waste gas usually contains dust particles, the dust particles will be blocked on the microwave catalytic box, reducing the contact between the waste gas and the microwave catalytic box, and affecting the catalytic effect. In order to avoid the microwave catalytic box being blocked by dust, a filter layer is usually installed on the front side of the microwave catalytic box to filter the dust.

[0003] However, when the filter layer is blocked by dust, the air flow will be reduced, affecting the waste gas treatment efficiency. Therefore, the filter layer needs to be replaced and cleaned. However, it is not convenient to disassemble when replacing. Therefore, a brush is usually used to sweep the dust on the surface of the filter layer to reduce the blockage and improve the service life.

[0004] However, when the brush sweeps the dust, the bristles will contact the filter layer and sweep the dust into the pores of the filter layer, making it easier for the dust to pass through the pores of the filter layer.

[0005] Therefore, a microwave catalytic cracking device for treating trichloroethylene waste gas is needed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The content part of the application is used to introduce the concept in a simple form, which will be described in detail in the specific embodiment part. The content part of the application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0007] To solve the technical problems mentioned in the background section, some embodiments of the present application provide a microwave catalytic cracking device for treating trichloroethylene waste gas, comprising: a cracking tank having a gas inlet for waste gas and a gas outlet for exhaust gas; a microwave catalytic box arranged in the cracking tank; a filter layer arranged on the side of the microwave catalytic box close to the gas inlet, the waste gas passing through the filter layer and the microwave catalytic box in sequence; a brush assembly arranged on the filter layer for removing dust on the filter layer; the brush assembly comprises: a rotating shaft cylinder arranged in the cracking tank, one end of the rotating shaft cylinder penetrating through the filter layer; a mounting plate fixedly arranged in the cracking tank on the side of the filter layer close to the gas outlet for mounting the rotating shaft cylinder; a brush arranged on the rotating shaft cylinder on the side of the filter layer close to the gas inlet for cleaning dust on the filter layer; and a dust blocking piece arranged opposite the brush for blocking dust passing through the pores of the filter layer when the brush is cleaning.

[0008] The filter layer is arranged to prevent dust from directly entering the microwave catalytic box, and the brush and the dust blocking piece are arranged to clean the dust on the surface of the filter layer, thereby preventing the filter layer from being blocked by dust. Under the action of the dust blocking piece, dust is prevented from falling into the microwave catalytic box through the filter layer when the brush is cleaning the filter layer, thereby affecting the catalytic effect.

[0009] Further, the dust blocking piece comprises: a baffle fixedly arranged on the rotating shaft cylinder on the side of the filter layer close to the gas outlet for blocking dust; and a structure pipe arranged on the rotating shaft cylinder for blowing air into the pores of the filter layer to blow dust out from the side close to the gas inlet and suck dust on the baffle out.

[0010] The baffle is arranged to block dust passing through the pores of the filter layer, and the structure pipe is arranged to blow air from the side of the filter layer away from the gas inlet to the side close to the gas inlet to blow dust in the pores out, thereby preventing blockage, and the blown dust is gathered by the brush.

[0011] Further, the structure pipe comprises: an inner pipe portion and an outer pipe portion, the outer pipe portion being sleeved on the inner pipe portion, the inner pipe portion having a blowing part penetrating out of the outer pipe portion, the blowing part facing the direction of the filter layer, and the outer pipe portion being provided with a dust suction part facing the direction of the baffle.

[0012] The blowing part is arranged to blow dust in the pores out, and when a small amount of dust inevitably passes through the pores and falls on the baffle, the dust on the baffle is sucked out by the dust suction part.

[0013] Further, a sliding sleeve is sleeved on the rotating shaft cylinder, the sliding sleeve being axially slidably arranged on the rotating shaft cylinder, a spring being arranged between the sliding sleeve and the rotating shaft cylinder, both ends of the spring being fixedly connected with the sliding sleeve and the rotating shaft cylinder, and the brush being fixedly arranged on the sliding sleeve.

[0014] The brush can be close to one side of the filter layer through the sliding sleeve and the spring, and dust on the filter layer can be swept and gathered.

[0015] Further, the rotating shaft cylinder comprises a fixed end fixedly connected to the mounting plate and a rotating end rotatably connected to the fixed end, a rotating seal is arranged between the fixed end and the rotating end, the outer pipe part is connected to the rotating end, and the inner pipe part is rotatably connected to the fixed pipe located in the fixed end.

[0016] Through the fixed end and the rotating end, dust in the inner cavity of the rotating end can be sucked into the fixed end through the communication of the inner cavities of the fixed end and the rotating end, and the outer pipe part is connected to the inner cavity of the rotating end, so that dust on the baffle can be sucked and removed and then fall into the inner cavity of the fixed end through the rotating end.

[0017] Further, the air pump is fixedly arranged on the mounting plate, the air inlet end of the air pump is connected to the inner cavity of the fixed end, the air outlet end of the air pump is connected to the fixed pipe, and filter screens are arranged at the connection positions of the air inlet end of the air pump and the air outlet end of the air pump.

[0018] Through the air pump, air in the inner cavity of the fixed end can be sucked into the fixed pipe, so that negative pressure is formed in the inner cavity of the fixed end and the outer pipe part, air is discharged into the fixed pipe, and relatively high air pressure is formed in the fixed pipe, so that air is blown towards the filter layer through the cooperation of the fixed pipe and the inner pipe part.

[0019] Further, the motor is also fixedly arranged on the mounting plate, and a transmission belt for transmission is arranged between the output shaft of the motor and the rotating end.

[0020] Through the motor and the transmission belt, the rotating end can rotate to clean the filter layer in all directions.

[0021] Further, the fixed end is connected to an inclined pipe for discharging dust, and one end of the inclined pipe extends to the outside.

[0022] Through the inclined pipe, dust can slide out to the outside along the inclined pipe.

[0023] Further, the sliding sleeve is fixedly connected to a dust suction pipe connected to the rotating end, and the dust suction pipe is provided with a dust suction port close to the air inlet side of the filter layer.

[0024] Through the dust suction pipe, dust gathered by the brush can be sucked and removed, and dust can enter the fixed end and be discharged along the inclined pipe due to the communication between the rotating end and the inner cavity of the fixed end.

[0025] The application has the following beneficial effects:

[0026] 1. The filter layer is arranged to avoid dust directly entering the microwave catalytic box, the brush and the dust blocking piece are arranged to clean the dust on the surface of the filter layer, avoid the filter layer being blocked by the dust, the baffle is arranged to block the dust passing through the pores of the filter layer, the structure pipe is arranged to blow the dust in the pores from the side far away from the air inlet to the side close to the air inlet, avoid the pores being blocked, and the brush is arranged to gather the blown dust.

[0027] 2. The fixed end and the rotating end are arranged, the inner cavities of the fixed end and the rotating end are communicated to enable the dust in the inner cavity of the rotating end to be sucked into the fixed end, the outer pipe part is connected to the inner cavity of the rotating end, the dust on the baffle is sucked away by the outer pipe part and then falls into the inner cavity of the fixed end through the rotating end, the air pump is arranged to enable the gas in the inner cavity of the fixed end to be extracted into the fixed pipe, enable the inner cavity of the fixed end and the outer pipe part to form negative pressure, and enable a larger air pressure to be formed in the fixed pipe, thereby blowing the filter layer. Meanwhile, the negative pressure existing in the fixed end enables the exhaust gas not to be discharged to the outside, thereby avoiding the exhaust gas leakage.

[0028] 3. The dust suction pipe is arranged to suck away the dust gathered by the brush, the inner cavities of the rotating end and the fixed end are communicated to enable the dust to pass into the fixed end and be discharged along the inclined pipe, and the negative pressure existing in the fixed end enables the inclined pipe to also have negative pressure, thereby avoiding the exhaust gas leakage when the dust is taken out. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present application and, together with their description, serve to explain the application.

[0030] In addition, throughout the drawings, same or similar reference numerals are used to denote same or similar elements. It should be understood that the drawings are schematic, and the elements and elements are not necessarily drawn according to the scale.

[0031] In the drawings:

[0032] Figure 1 is a whole schematic diagram according to an embodiment of the present application;

[0033] Figure 2 is Figure 1 the internal structure schematic diagram of the cracking tank in the embodiment;

[0034] Figure 3 is Figure 1 the installation schematic diagram of the rotating shaft cylinder in the embodiment;

[0035] Figure 4 is Figure 1A schematic view of a cross section of the structural tube in the embodiment;

[0036] Figure 5 is Figure 4 A local enlarged schematic view at A in the embodiment.

[0037] Reference signs:

[0038] 100, cracking tank; 101, microwave catalytic box; 102, filter layer; 103, rotating shaft cylinder; 104, mounting plate; 105, brush; 106, dust blocking piece; 107, air inlet; 108, air outlet; 109, fixed end; 110, rotating end; 111, sliding sleeve; 112, spring; 113, dust suction pipe; 114, dust suction port; 115, motor; 116, transmission belt; 117, baffle; 118, structural tube; 119, inner tube part; 120, outer tube part; 121, air blowing part; 122, dust suction part; 123, fixed tube; 124, air pump; 125, air inlet end; 126, air outlet end; 127, inclined tube. DETAILED DESCRIPTION

[0039] Embodiments of the present disclosure will be described in more detail with reference to the drawings. Although certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood. It should be understood that the drawings of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0040] In addition, it should be further noted that only parts related to the present application are shown in the drawings for ease of description. The embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0041] It should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0042] It should be noted that the modification of "one" or "multiple" in the present disclosure is illustrative and not restrictive, and those skilled in the art should understand that unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0043] The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0044] Reference Figures 1-5The utility model relates to a kind of microwave catalytic pyrolysis device for processing trichloroethylene waste gas, comprising: pyrolysis tank 100, microwave catalytic box 101, filter layer 102, rotating shaft cylinder 103, mounting plate 104, brush 105, dust retaining part 106.Pyrolysis tank 100 has the gas inlet 107 into waste gas and the gas outlet 108 of discharging gas.The gas inlet 107 is located on the upper end of the pyrolysis tube, and the gas outlet 108 is located on the lower end of the pyrolysis tank 100.Filter layer 102 and microwave catalytic box 101 are sequentially arranged in pyrolysis tank 100, and waste gas sequentially passes through filter layer 102 and microwave catalytic box 101.By filter layer 102, dust in waste gas is filtered out to avoid dust affecting catalytic efficiency.Microwave catalytic box 101 is provided with microwave pyrolysis assembly, for emitting microwave to microwave catalytic box 101 (for reference, the light microwave catalytic assembly disclosed in the disclosure document with the disclosure number CN215996207U), and trichloroethylene can be treated by microwave pyrolysis (reference material: [1] Li Ruina. Microwave plasma removal of trichloroethylene under normal pressure [D]. Dalian Maritime University, 2011. DOI:10.7666 / d.y1895954.).

[0045] Mounting plate 104 is fixedly arranged in pyrolysis tank 100, between filter layer 102 and microwave catalytic box 101.Rotating shaft cylinder 103 is installed on mounting plate 104, and rotating shaft cylinder 103 includes: fixed end 109 fixedly connected on mounting plate 104 and rotating end 110 rotatably connected with fixed end 109, fixed end 109 and rotating end 110 are provided with the inner cavity in communication, and rotating seal is arranged at the connection.Rotating end 110 passes through filter layer 102, and rotating end 110 is slidably provided with sliding sleeve 111 at one end of filter layer 102, and sliding sleeve 111 is in communication with rotating end 110.Spring 112 is connected between sliding sleeve 111 and rotating end 110, and both ends of spring 112 are fixedly connected with sliding sleeve 111 and rotating end 110 respectively.

[0046] Brush 105 is fixedly arranged on sliding sleeve 111, and located at the side of filter layer 102 close to gas inlet 107.Sliding sleeve 111 is also fixedly connected with dust suction pipe 113 in communication with the inner cavity of rotating end 110, and dust suction port 114 close to the side of filter layer 102 gas inlet 107 is arranged on dust suction pipe 113.Dust suction pipe 113 and brush 105 are located at the position of both sides of rotating end 110 axis.In another embodiment, one end of rotating end 110 is closed, and brush 105 and dust suction pipe 113 are fixedly connected on rotating end 110.

[0047] The motor 115 is fixedly connected to the mounting plate 104, and a transmission belt 116 is arranged between the output shaft of the motor 115 and the rotating end 110, so that when the motor 115 outputs power, the rotating end 110 is driven to rotate. When the rotating end 110 rotates, the brush 105 is driven to move along the filter layer 102 and clean the surface of the filter layer 102.

[0048] The dust blocking piece 106 includes a baffle 117 and a structure pipe 118. The baffle 117 is fixedly connected to the rotating end 110 and located on the side of the filter layer 102 close to the exhaust port 108 and opposite to the brush 105, so that when the brush 105 cleans one area of the filter layer 102, the baffle 117 is located on the side of the area close to the exhaust port 108. The structure pipe 118 is also fixedly arranged on the rotating end 110. The structure pipe 118 includes an inner pipe portion 119 and an outer pipe portion 120. The outer pipe portion 120 is in communication with the inner cavity of the rotating end 110, and the outer pipe portion 120 is sleeved on the inner pipe portion 119. The inner pipe portion 119 has a blowing portion 121 extending out of the outer pipe portion 120, and the blowing portion 121 faces the filter layer 102. The outer pipe portion 120 is provided with a dust suction portion 122 facing the baffle 117. The inner pipe portion 119 has a first portion and a second portion perpendicular to each other. The first portion is located in the outer pipe portion 120 and extends along the outer pipe portion 120. The second portion is located in the rotating end 110 and coincides with the axis of the rotating end 110.

[0049] The fixed pipe 123 is arranged in the rotating end 110 and rotationally connected to the second portion of the inner pipe portion 119 along the axis of the rotating end 110, and a rotating seal is arranged at the connection position.

[0050] The air pump 124 is fixedly mounted on the mounting plate 104. The air inlet end 125 of the air pump 124 is connected to the inner cavity of the fixed end 109, and the air outlet end 126 of the air pump 124 is connected to the fixed pipe 123. The air inlet end 125 of the air pump 124 and the air outlet end 126 of the air pump 124 are both provided with filter screens. The inclined pipe 127 for discharging dust is connected to the lower end of the fixed end 109 and extends to the outside. The dust is discharged to the outside through the inclined pipe 127, and a closure cover is arranged at the end of the inclined pipe 127 located outside.

[0051] Use method or working process:

[0052] 1. When it is necessary to clean the dust on the filter layer 102, the motor 115 is started to output power, so as to drive the rotating end 110 to rotate and drive the brush 105 and the dust suction pipe 113 to rotate. Under the action of the spring 112, the brush 105 moves along the filter layer 102 to sweep and gather the dust. The brush 105 sweeps the dust into the pores of the filter layer 102, and the dust inevitably falls on the baffle 117 through the pores.

[0053] 2. When the motor 115 is started, the air pump 124 is started, so that the gas in the air inlet 125 of the air pump 124 is sucked in and discharged from the air outlet 126, so that the cavity in the rotating end 110 forms a negative pressure, and then the outer tube part 120 is sucked by the suction part 122, so that the dust on the baffle 117 is sucked into the outer tube part 120 to the rotating end 110, and then falls into the fixed end 109; at the same time, the gas is discharged from the air outlet 126 of the air pump 124 into the fixed tube 123, and is blown out by the blowing part 121 of the inner tube part 119, so that the dust in the pores of the filter layer 102 is blown out from the side close to the air inlet.

[0054] 3. When the air pump 124 is started, the cavity in the rotating end 110 forms a negative pressure, so that the dust suction port 114 starts to suck dust, and the dust enters the rotating end 110 and then the fixed end 109 from the dust suction tube 113.

[0055] 4. After the rotating end 110 rotates one circle, the motor 115 reverses the output power, so that the rotating end 110 reverses the rotation, and then the dust suction tube 113 rotates to the dust gathering position, so that the dust is sucked and removed, and the dust enters the fixed end 109 through the rotating end 110, and is discharged through the inclined tube 127 connected to the fixed end 109, and the end of the inclined tube 127 located outside is provided with a closed cover.

[0056] 5. Because the air pump 124 forms a negative pressure in the fixed end 109 and the rotating end 110, the exhaust gas cannot leak from the inclined tube 127.

[0057] The above description is only some of the preferred embodiments of the present disclosure and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the application involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features disclosed in the embodiments of the present disclosure (but not limited to) having similar functions to form technical solutions.

Claims

1. A microwave catalytic cracking device for treating trichloroethylene waste gas, characterized in that: The device comprises: a cracking tank (100) having an air inlet (107) and an air outlet (108); a microwave catalytic box (101) arranged in the cracking tank (100); a filter layer (102) arranged on the side of the microwave catalytic box (101) close to the air inlet (107), through which the exhaust gas passes in sequence; a brush (105) assembly arranged on the filter layer (102) for cleaning dust on the filter layer (102); the brush (105) assembly comprises: a rotating shaft cylinder (103) arranged in the cracking tank (100), one end of the rotating shaft cylinder (103) penetrating through the filter layer (102); a mounting plate (104) fixedly arranged in the cracking tank (100) on the side of the filter layer (102) close to the air outlet (108) for mounting the rotating shaft cylinder (103); a brush (105) arranged on the rotating shaft cylinder (103) on the side of the filter layer (102) close to the air inlet (107) for cleaning dust on the filter layer (102); a dust blocking piece (106) arranged opposite to the brush (105) for blocking dust passing through the pores of the filter layer (102) during cleaning by the brush (105).

2. The device according to claim 1, wherein: the dust blocking piece (106) comprises: a baffle (117) fixedly arranged on the rotating shaft cylinder (103) on the side of the filter layer (102) close to the air outlet (108) for blocking dust; a structure pipe (118) arranged on the rotating shaft cylinder (103) for blowing air into the pores of the filter layer (102) to blow dust out from the side close to the air inlet (107) and suck dust on the baffle (117) out.

3. The device according to claim 2, wherein: the structure pipe (118) comprises: an inner pipe portion (119) and an outer pipe portion (120), the outer pipe portion (120) being sleeved on the inner pipe portion (119), the inner pipe portion (119) having a blowing part (121) penetrating out of the outer pipe portion (120), the blowing part (121) being directed towards the filter layer (102), and the outer pipe portion (120) being provided with a dust suction part (122) directed towards the baffle (117).

4. The device according to claim 3, wherein: a sliding sleeve (111) is sleeved on the rotating shaft cylinder (103), the sliding sleeve (111) being axially slidably arranged on the rotating shaft cylinder (103), a spring (112) being arranged between the sliding sleeve (111) and the rotating shaft cylinder (103), both ends of the spring (112) being fixedly connected with the sliding sleeve (111) and the rotating shaft cylinder (103), respectively, and the brush (105) being fixedly arranged on the sliding sleeve (111).

5. The device according to claim 4, wherein: The rotating shaft cylinder (103) comprises a fixed end (109) fixedly connected to the mounting plate (104) and a rotating end (110) rotatably connected to the fixed end (109), a rotating seal is arranged between the fixed end (109) and the rotating end (110), the outer pipe portion (120) is connected to the rotating end (110), and the inner pipe portion (119) is rotatably connected with the fixed pipe (123) located in the fixed end (109).

6. The microwave catalytic cracking device for treating trichloroethylene waste gas according to claim 5, characterized in that: The mounting plate (104) is fixedly provided with an air pump (124), the air inlet end (125) of the air pump (124) is connected to the inner cavity of the fixed end (109), the air outlet end (126) of the air pump (124) is connected to the fixed pipe (123), and the air inlet end (125) of the air pump (124) and the air outlet end (126) of the air pump (124) are both provided with filter screens.

7. The microwave catalytic cracking device for treating trichloroethylene waste gas according to claim 5, characterized in that: The mounting plate (104) is further fixedly provided with a motor (115), and a transmission belt (116) for transmission is arranged between the output shaft of the motor (115) and the rotating end (110).

8. The microwave catalytic cracking device for treating trichloroethylene waste gas according to claim 5, characterized in that: The fixed end (109) is connected with an inclined pipe (127) for discharging dust, and one end of the inclined pipe (127) extends to the outside.

9. The microwave catalytic cracking device for treating trichloroethylene waste gas according to claim 4, characterized in that: The sliding sleeve (111) is fixedly connected with a dust suction pipe (113) connected to the rotating end (110), and the dust suction pipe (113) is provided with a dust suction port (114) close to the air inlet (107) of the filter layer (102).

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