Waste gas treatment device

Abstract

The waste gas treatment device comprises cabinet bodies, a screen plate, a first three-way valve and a second three-way valve, the cabinet bodies are arranged in pairs, openings are formed in the two cabinet bodies, cabinet doors are hinged to the two openings, an air inlet and an air outlet are formed in the tops and the bottoms of the two cabinet bodies respectively, and the screen plate is connected with the inner walls of the cabinet bodies in a sliding mode. Two ends of the first three-way valve are communicated with the two air inlets, the other end of the first three-way valve is communicated with waste gas, two ends of the second three-way valve are communicated with the two air outlets, and the other end of the second three-way valve is connected with a fan. And the other cabinet body can be communicated with the first three-way valve and the second three-way valve, so that the polyamide production line can operate normally, shutdown waiting is not needed, and the production efficiency of polyamide is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a waste gas treatment device. Background Art

[0002] In the production process of polyamide, in order to prevent volatile aromatic diamines, aromatic diacids and polyamide from entering the air and thus affecting the health of workers, some waste gas treatment devices are usually used to treat them. For example, the utility model patent of the authorization announcement number CN214715598U, entitled a polyamide granulation waste gas treatment device, includes a treatment box, a fixing seat is fixedly connected to the bottom of the right side of the treatment box, a circulating pump is fixedly connected to the top of the fixing seat, a first connecting pipe is connected to the left side of the circulating pump, and the left side of the first connecting pipe passes through the right side of the treatment box and extends to the inner cavity of the treatment box. Through the coordinated use of the treatment box, the fixing seat, the circulating pump, the first connecting pipe, the second connecting pipe, the first air inlet pipe, the fan, the second air inlet pipe, the filter plate, the filter element, the activated carbon filter layer, the magnesium oxide adsorption layer and the biological filter material layer, the problem of poor waste gas treatment effect and easy environmental pollution during use of the waste gas treatment device for traditional polyamide granulation production can be effectively solved.

[0003] However, in order to ensure the treatment effect of the above-mentioned device, the filter plate and filter element need to be cleaned or replaced regularly. During the cleaning or replacement of the filter plate and filter element, the polyamide production line needs to be shut down and wait, which destroys the continuity and stability of the production line, thereby reducing the production efficiency of polyamide. Utility Model Content

[0004] The utility model aims to overcome the above technical deficiencies and propose an exhaust gas treatment device to solve the technical problem in the prior art that cleaning or replacing filter plates and filter elements will lead to reduced production efficiency of polyamide.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides an exhaust gas treatment device, comprising:

[0007] Cabinets, the cabinets are arranged in pairs, both cabinets are provided with openings, both openings are hinged with cabinet doors, and the tops and bottoms of the two cabinets are provided with air inlets and air outlets respectively;

[0008] A mesh plate, the mesh plate being slidably connected to the inner wall of the cabinet;

[0009] A first three-way valve, wherein two ends of the first three-way valve are connected to the two air inlets, and the other end is connected to the exhaust gas;

[0010] A second three-way valve, wherein two ends of the second three-way valve are connected to the two air outlets, and the other end is connected to the fan.

[0011] In some embodiments, a slide rail is fixedly connected to the inner wall of the cabinet, and the mesh plate is slidably connected to the top of the slide rail.

[0012] In some embodiments, both of the air inlets are connected to an air inlet pipe, and one end of the two air inlet pipes away from the two air inlets is connected to the first three-way valve.

[0013] In some embodiments, a bracket is provided at the bottom of the two air inlet pipes.

[0014] In some embodiments, the two air outlets are connected to an air outlet pipe, and one end of the two air outlet pipes away from the two air outlets is connected to the second three-way valve.

[0015] In some embodiments, a protrusion is fixedly connected to one end of each mesh plate close to the opening.

[0016] In some embodiments, one end of the fan away from the second three-way valve is connected to a chimney.

[0017] In some embodiments, flexible pipes are connected between the second three-way valve and the fan and between the chimney and the fan.

[0018] In some embodiments, one end of the first three-way valve for communicating with exhaust gas is connected to a main pipeline.

[0019] In some embodiments, a sealing strip is provided between the cabinet body and the cabinet door.

[0020] In a second aspect, the utility model also provides an exhaust gas treatment device,

[0021] Compared with the prior art, the waste gas treatment device provided by the utility model, on the one hand, by setting a pair of cabinets, a first three-way valve and a second three-way valve, when the staff cleans or replaces the filter materials such as activated carbon on the mesh plate in any cabinet, the other cabinet can maintain the connection with the first three-way valve and the second three-way valve, thereby making the polyamide production line operate normally without stopping and waiting, ensuring the continuity and stability of the production line, and effectively improving the production efficiency of polyamide;

[0022] On the other hand, through the sliding connection between the mesh plate and the inner wall of the cabinet, the staff can replace or clean the activated carbon and other filter materials by opening the cabinet door and pulling out the mesh plate. Compared with the traditional fixed connection between the filter materials and the cabinet, it effectively improves the convenience of the staff in replacing or cleaning the activated carbon and other filter materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of an exhaust gas treatment device provided by an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the connection relationship between the cabinet and the mesh plate.

[0025] Description of reference numerals:

[0026] 1. Cabinet body; 11. Opening; 12. Cabinet door; 121. Sealing strip; 13. Air inlet; 131. Air inlet pipe; 132. Bracket; 14. Air outlet; 141. Air outlet pipe; 15. Slide rail; 2. Mesh plate; 21. Protrusion; 3. First three-way valve; 31. Main pipeline; 4. Second three-way valve; 5. Fan; 51. Flexible pipe; 6. Chimney. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] In order to solve the technical problem that cleaning or replacing filter plates and filter cores will lead to reduced production efficiency of polyamide, the utility model provides an exhaust gas treatment device that can achieve cleaning or replacement of filter plates and filter cores without affecting the production efficiency of polyamide.

[0029] It should be noted that the waste gas treatment device described in the utility model is used for but not limited to the production of polyamide, etc. For the convenience of explanation, in the utility model, only an exhaust gas treatment device applied to the production of polyamide is used as an example for explanation. The principle of applying an exhaust gas treatment device to other types of equipment is essentially the same as the principle applied to the production of polyamide, and will not be repeated here.

[0030] See also Figure 1 , Figure 1 This is a structural schematic diagram of an exhaust gas treatment device in an embodiment of the utility model, an exhaust gas treatment device comprising a cabinet 1, a mesh plate 2, a first three-way valve 3 and a second three-way valve 4, the cabinets 1 are arranged in pairs, both cabinets 1 are provided with openings 11, both openings 11 are hinged with cabinet doors 12, the tops and bottoms of the two cabinets 1 are respectively provided with air inlets 13 and air outlets 14, the mesh plate 2 is slidably connected to the inner wall of the cabinet 1, both ends of the first three-way valve 3 are connected to the two air inlets 13, and the other end is connected to the exhaust gas, both ends of the second three-way valve 4 are connected to the two air outlets 14, and the other end is connected to the fan 5.

[0031] In this embodiment, on the one hand, by providing a pair of cabinets 1, a first three-way valve 3 and a second three-way valve 4, when the staff cleans or replaces the filter material such as activated carbon on the mesh plate 2 in any cabinet 1, the other cabinet 1 can maintain communication with the first three-way valve 3 and the second three-way valve 4, thereby allowing the polyamide production line to operate normally without stopping and waiting, thereby ensuring the continuity and stability of the production line and effectively improving the production efficiency of polyamide;

[0032] On the other hand, by slidingly connecting the mesh plate 2 to the inner wall of the cabinet 1, the staff can replace or clean the activated carbon and other filtering materials by opening the cabinet door 12 and pulling out the mesh plate 2. Compared with the traditional fixed connection between the filtering materials and the cabinet 1, it effectively improves the convenience of the staff in replacing or cleaning the activated carbon and other filtering materials.

[0033] First, the staff places various filtering materials such as activated carbon on each mesh plate 2 and closes the cabinet door 12; then, the first three-way valve 3 and the second three-way valve 4 are operated to make only one cabinet 1 connected to the first three-way valve 3 and the second three-way valve 4; finally, the fan 5 is started, and the exhaust gas passes through the first three-way valve 3, the air inlet 13, the mesh plate 2, the air outlet 14 and the second three-way valve 4 in sequence, and the various filtering materials such as activated carbon on the mesh plate 2 filter the exhaust gas, effectively alleviating the pollution of the exhaust gas to the outside air.

[0034] Furthermore, the number of mesh panels 2 is more than two, and each mesh panel 2 is stacked in the cabinet 1 at equal intervals along the height direction of the cabinet 1, and each mesh panel 2 is slidably connected to the inner wall of the cabinet 1, so that a variety of filter materials such as an activated carbon filter layer, a magnesium oxide adsorption layer and a biological filter material layer can be stored in the cabinet 1, thereby effectively improving the filtering effect.

[0035] Furthermore, the specific number of cabinets 1 can be determined according to the scale of the factory. Cabinet 1 is an independent unit with absorption function, and any number can be combined according to needs. The connection between cabinets 1 adopts a detachable flange bolt connection structure, and needs to be well sealed.

[0036] It should be noted that the first three-way valve 3 and the second three-way valve 4 are both three-way valves (three-way valves are prior art and will not be described in detail here).

[0037] In one embodiment, see Figure 2 The inner wall of the cabinet 1 is fixedly connected with a slide rail 15, and the mesh panels 2 are slidably connected to the top of the slide rail 15. In this embodiment, the slide rail 15 is fixedly connected to the inner wall opposite to the cabinet 1, and the number of the slide rail 15 is the same as the number of the mesh panels 2. The function of the slide rail 15 is to support the mesh panels 2, so that there is a distance between each mesh panel 2, which is convenient for the staff to pull out the mesh panels 2.

[0038] In one embodiment, see Figure 1 , both air inlets 13 are connected to air inlet pipes 131, and one end of the two air inlet pipes 131 away from the two air inlets 13 is connected to the first three-way valve 3. In this embodiment, the air inlet pipe 131 is used to connect the cabinet 1 and the first three-way valve 3, so that the first three-way valve 3 can control the connection relationship between the two air inlet pipes 131. When it is necessary to clean or replace the activated carbon in any one of the cabinets 1, the first three-way valve 3 can be operated to block the air inlet pipe 131 of this section.

[0039] In one embodiment, see Figure 1 A support 132 is provided at the bottom of the two air inlet pipes 131. In this embodiment, the function of the support 132 is to ensure the normal operation of the air inlet pipe 131 and prevent the air inlet pipe 131 from collapsing.

[0040] In one embodiment, see Figure 1 , both gas outlets 14 are connected to gas outlet pipes 141, and one end of the two gas outlet pipes 141 away from the two gas outlets 14 is connected to the second three-way valve 4. In this embodiment, the function of the gas outlet pipe 141 is to connect the cabinet 1 and the second three-way valve 4, so that the second three-way valve 4 can control the connection relationship between the two gas outlet pipes 141. When it is necessary to clean or replace the activated carbon in any one of the cabinets 1, the second three-way valve 4 can be operated to block the gas outlet pipe 141 of this section.

[0041] In one embodiment, see Figure 2 , each mesh plate 2 is fixedly connected with a protrusion 21 at one end near the opening 11. In this embodiment, the protrusion 21 is fixedly connected to the bottom of the mesh plate 2, and the function of the protrusion 21 is to facilitate the staff to pull out the mesh plate 2, so that the mesh plate 2 is out of the cabinet 1, and it is convenient for the staff to replace the activated carbon.

[0042] In one embodiment, see Figure 1 The end of the fan 5 away from the second three-way valve 4 is connected to a chimney 6. In this embodiment, the chimney 6 is used to guide the treated exhaust gas to be discharged into the outside air. A rain shield is also provided on the top of the chimney 6 to prevent rainwater from entering the chimney 6 and affecting the operation of the equipment.

[0043] In one embodiment, see Figure 1 A flexible tube 51 is connected between the second three-way valve 4 and the fan 5 and between the chimney 6 and the fan 5. In this embodiment, the flexible tube 51 can effectively alleviate the negative impact caused by the long-term vibration of the fan 5, and effectively avoid the problem of loosening of each bolt caused by the long-term vibration of the fan 5.

[0044] In one embodiment, see Figure 1, one end of the first three-way valve 3 for connecting the exhaust gas is connected to the main pipeline 31. In this embodiment, there are multiple reactors in a plant, and a trumpet-shaped absorption port is set above the discharge port of each reactor. The absorption port is connected to the main pipeline 31 through a branch pipeline, and the main pipeline 31 gathers the exhaust gas into the cabinet 1.

[0045] Furthermore, each absorption port is provided with a valve for controlling the switch and flow, which effectively avoids overload operation of the device.

[0046] In one embodiment, see Figure 2 A sealing strip 121 is provided between the cabinet body 1 and the cabinet door 12. In this embodiment, the sealing strip 121 is used to prevent exhaust gas from leaking from the opening 11, thereby ensuring the normal operation of the device.

[0047] In order to better understand the present invention, the following Figure 1 to Figure 2 The technical solution of the utility model is described in detail:

[0048] First, the number of cabinets 1 is determined according to the scale of the plant, and they are assembled and sealed by flange bolts; secondly, the staff pulls out each mesh plate 2 by grasping the protrusion 21, and places various filtering materials such as activated carbon on each mesh plate 2; then, the mesh plate 2 is pushed into the cabinet 1 along the slide rail 15, and the cabinet door 12 is closed; then, the first three-way valve 3 and the second three-way valve 4 are operated so that only one cabinet 1 is connected to the first three-way valve 3 and the second three-way valve 4; finally, the fan 5 is started so that the device is in a negative pressure state, and the exhaust gas passes through the main pipeline 31, the first three-way valve 3, the air inlet pipe 131, the air inlet 13, the cabinet 1, each mesh plate 2, the air outlet 14, the air outlet pipe 141, the second three-way valve 4, the fan 5 and the chimney 6 in sequence, and the various filtering materials such as activated carbon on each mesh plate 2 filter the exhaust gas, effectively alleviating the pollution of the exhaust gas to the outside air.

[0049] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An exhaust gas treatment device, characterized in that: include: Cabinets, the cabinets are arranged in pairs, both cabinets are provided with openings, both openings are hinged with cabinet doors, and the tops and bottoms of the two cabinets are provided with air inlets and air outlets respectively; A mesh plate, the mesh plate being slidably connected to the inner wall of the cabinet; A first three-way valve, wherein two ends of the first three-way valve are connected to the two air inlets, and the other end is connected to the exhaust gas; A second three-way valve, wherein two ends of the second three-way valve are connected to the two air outlets, and the other end is connected to the fan.

2. The exhaust gas treatment device according to claim 1, characterized in that: The inner wall of the cabinet is fixedly connected with a slide rail, and the mesh plate is slidably connected to the top of the slide rail.

3. The exhaust gas treatment device according to claim 1, characterized in that: The two air inlets are both connected to an air inlet pipe, and one end of the two air inlet pipes away from the two air inlets is connected to the first three-way valve.

4. The exhaust gas treatment device according to claim 3, characterized in that: The bottoms of the two air inlet pipes are provided with brackets.

5. The exhaust gas treatment device according to claim 1, characterized in that: The two air outlets are both connected to an air outlet pipe, and one end of the two air outlet pipes away from the two air outlets is connected to the second three-way valve.

6. The exhaust gas treatment device according to claim 1, characterized in that: A protrusion is fixedly connected to one end of each mesh plate close to the opening.

7. The exhaust gas treatment device according to claim 1, characterized in that: One end of the fan away from the second three-way valve is connected to a chimney.

8. The exhaust gas treatment device according to claim 7, characterized in that: Flexible pipes are connected between the second three-way valve and the fan and between the chimney and the fan.

9. The exhaust gas treatment device according to claim 1, characterized in that: One end of the first three-way valve for communicating with the exhaust gas is connected to the main pipeline.

10. The exhaust gas treatment device according to claim 1, characterized in that: A sealing strip is provided between the cabinet body and the cabinet door.

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