A multi-stage filter for exhaust gas treatment

Abstract

The utility model discloses a multistage filter for waste gas treatment belongs to waste gas treatment field, including cloth bag dust collector still includes trachea subassembly, fixedly connected on cloth bag dust collector, detection subassembly is fixedly connected on trachea subassembly, the one side of cloth bag dust collector is equipped with the air inlet, and the other side is equipped with the gas outlet, and trachea subassembly fixedly connected on the gas outlet, and trachea subassembly includes the drooping pipe fixedly connected on the gas outlet, and the expansion pipe fixedly connected in drooping pipe end portion. The utility model carries out the primary dust removal to waste gas through cloth bag dust collector, uses the drooping pipe to introduce waste gas into the filter section and carries out the filtration, and after filtering, the content of harmful substance in waste gas is detected through the sensor module, and the detection subassembly can be repeated according to the demand and is superposed, and the filtration effect or detection accuracy is promoted, and until the gas cleanliness in the pipe can be discharged, and the filtered waste gas cleanliness can be evaluated and is intervened, and the filter core is convenient to replace, and the manpower investment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically a multi-stage filter for waste gas treatment. Background Technology

[0002] Factories generate waste gas during production, and there are strict standards for waste gas emissions. Waste gas that does not meet the emission standards is discharged without permission, which may result in fines or business suspension, or even serious damage to the local ecology. In the current technology, the treatment of waste gas usually requires multi-stage treatment to completely filter out harmful substances in the waste gas. In the existing multi-stage treatment process, after the equipment is installed, the replacement of filter materials and the cleaning of impurities are cumbersome and complicated, and it is impossible to analyze the filtered gas in a timely and effective manner. If the filtered gas does not meet the standards, there is no way to intervene quickly and effectively.

[0003] An investigation revealed that a Chinese utility model patent (publication number: CN222305187U) discloses a multi-stage filter for waste air treatment, comprising a housing. An exhaust port is located on the left side wall of the housing, and a waste air inlet and a fresh air inlet are located on the right side wall. Multiple mesh positioning frames are arranged side-by-side inside the housing between the left and right sides. Each positioning frame has filter cotton on its right side, with the density of the filter cotton increasing sequentially from right to left. An inspection door is located on the front side of the housing corresponding to the rear side of each positioning frame. The beneficial effects of this utility model are: by arranging multiple filter cottons side-by-side and spaced apart inside the housing, and using positioning frames for limiting installation, the filter cotton is fixed to the right side of the corresponding positioning frame, providing stable support; waste air is blown in from the waste air inlet on the rear side of the housing, filtered by the multi-stage filter cotton, and then discharged from the filter through the exhaust port on the left side. Simultaneously, fresh air is blown into the housing from the fresh air inlet on the left side, blowing away debris attached to the filter cotton, effectively improving filtration efficiency and preventing filter cotton clogging.

[0004] In existing technologies, multiple filter cottons are arranged side by side and spaced apart inside the housing. The filtered clean gas blows away the impurities on the filter cottons, improving filtration efficiency and preventing clogging. However, the filter materials in existing technologies cannot be flexibly changed or replaced, and it is impossible to accurately assess whether the filtered gas meets emission standards. Therefore, there is a need for a device that can accurately assess whether the emitted gas meets the standards, intervene in a timely manner if it fails to meet the standards, and facilitate the replacement of filter materials.

[0005] Therefore, this utility model provides a multi-stage filter for waste gas treatment to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved This invention provides a multi-stage filter for waste gas treatment, aiming to solve the problems mentioned in the background art.

[0007] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a multi-stage filter for waste gas treatment, including a bag filter, and an air pipe assembly fixedly connected to the bag filter; and a detection assembly fixedly connected to the air pipe assembly; The bag filter dust collector has an air inlet on one side and an air outlet on the other side. An air pipe assembly is fixedly connected to the air outlet. The air pipe assembly includes a pendant fixedly connected to the air outlet, an expander fixedly connected to the end of the pendant, a return pipe fixedly connected to the expander, and an acceleration pipe fixedly connected to the return pipe.

[0008] As a preferred technical solution of this application, the air pipe assembly includes a duct fan fixedly connected to the acceleration pipe, a return one-way valve fixedly connected to the acceleration pipe, an outlet pipe fixedly connected to the acceleration pipe, and a discharge one-way valve fixedly connected to the outlet pipe.

[0009] As a preferred technical solution of this application, the detection component includes a filter section fixedly connected to the expansion tube, an external flange fixedly connected to the filter section, a pull-out box fixedly connected to the filter section, a limiting groove opened on the pull-out box, a pull-out bracket slidably connected in the limiting groove, and a filter element fixedly connected to the end of the pull-out bracket.

[0010] As a preferred technical solution of this application, the detection assembly includes a detection section fixedly connected to an external flange, a detection box fixedly connected to the detection section, a mounting bracket slidably connected inside the detection box, and a sensor module fixedly connected to the mounting bracket.

[0011] As a preferred technical solution of this application, there is an angle between the direction of air intake of the return pipe and the axis of the expansion pipe, and the diameter of the acceleration pipe is smaller than that of the return pipe.

[0012] As a preferred technical solution of this application, both ends of the filter section and both ends of the detection section are fixedly connected to external flanges, and the number of filter sections and detection sections can be adjusted according to actual needs.

[0013] As a preferred technical solution of this application, the pull-out bracket and the filter element are integrated and can be replaced simultaneously; the mounting bracket and the sensor module are integrated and can be replaced simultaneously.

[0014] (III) Beneficial Effects This invention uses a bag filter to initially remove dust from the exhaust gas, then uses a drop pipe to introduce the exhaust gas into the filtration section for filtration. After filtration, a sensor module detects the content of harmful substances in the exhaust gas. The detection components can be stacked repeatedly as needed to improve the filtration effect or detection accuracy. If the exhaust gas still does not meet the standards in the outlet pipe after filtration, the discharge one-way valve closes and the return one-way valve opens. The unclean exhaust gas is accelerated through the acceleration pipe and then filtered again until the cleanliness of the gas in the outlet pipe meets the standards before it can be discharged. This allows for the evaluation and intervention of the cleanliness of the filtered exhaust gas, improving filtration efficiency. Furthermore, the filter element or sensor module can be quickly and conveniently replaced by pulling out the pull-out box or mounting bracket, reducing manpower input. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view for practical use; Figure 3 This is a structural diagram of the tracheal assembly in this practical application; Figure 4 This is a partial sectional view of the tracheal assembly of this utility model; Figure 5 This is a cross-sectional view of the detection component used in this utility model.

[0016] In the diagram: 1. Baghouse dust collector; 11. Air inlet; 12. Air outlet; 2. Air pipe assembly; 21. Drooping pipe; 22. Expander pipe; 23. Return pipe; 24. Accelerator pipe; 25. Duct fan; 26. Return check valve; 27. Outlet pipe; 28. Discharge check valve; 3. Detection assembly; 31. Filter section; 32. External flange; 33. Pull-out box; 34. Limiting groove; 35. Pull-out bracket; 36. Filter element; 37. Detection section; 38. Detection box; 39. Mounting bracket; 310. Sensor module. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model provides a multi-stage filter for waste gas treatment, such as... Figure 1-5 As shown, it includes a bag filter 1, an air pipe assembly 2, which is fixedly connected to the bag filter 1; and a detection assembly 3, which is fixedly connected to the air pipe assembly 2. The bag filter 1 has an air inlet 11 on one side and an air outlet 12 on the other side. The air pipe assembly 2 is fixedly connected to the air outlet 12. The air pipe assembly 2 includes a pendant 21 fixedly connected to the air outlet 12, an expander 22 fixedly connected to the end of the pendant 21, a return pipe 23 fixedly connected to the expander 22, and an acceleration pipe 24 fixedly connected to the return pipe 23.

[0019] The air pipe assembly 2 includes a duct fan 25 fixedly connected to the acceleration pipe 24, a return check valve 26 fixedly connected to the acceleration pipe 24, an outlet pipe 27 fixedly connected to the acceleration pipe 24, and a discharge check valve 28 fixedly connected to the outlet pipe 27.

[0020] The detection component 3 includes a filter section 31 fixedly connected to the expansion tube 22, an external flange 32 fixedly connected to the filter section 31, a pull-out box 33 fixedly connected to the filter section 31, a limiting groove 34 opened on the pull-out box 33, a pull-out bracket 35 slidably connected in the limiting groove 34, and a filter element 36 fixedly connected to the end of the pull-out bracket 35.

[0021] The detection assembly 3 includes a detection section 37 fixedly connected to an external flange 32, a detection box 38 fixedly connected to the detection section 37, a mounting bracket 39 slidably connected inside the detection box 38, and a sensor module 310 fixedly connected to the mounting bracket 39.

[0022] There is an angle between the direction of air intake of the return pipe 23 and the axis of the expansion pipe 22, and the diameter of the acceleration pipe 24 is smaller than that of the return pipe 23.

[0023] Both ends of the filter section 31 and both ends of the detection section 37 are fixedly connected to external flanges 32. The number of filter sections 31 and detection sections 37 can be adjusted according to actual needs.

[0024] The pull-out bracket 35 and the filter element 36 are integrated and can be replaced simultaneously; the mounting bracket 39 and the sensor module 310 are integrated and can be replaced simultaneously.

[0025] During use, the exhaust gas enters through the inlet 11. After the exhaust gas is initially removed by the bag filter 1, it enters the drop pipe 21 through the outlet 12. The drop pipe 21 introduces the exhaust gas into the expansion pipe 22, and then into the detection component 3 for filtration. The return pipe 23 and the direction of air intake of the expansion pipe 22 are at an angle, which is an acute angle.

[0026] After the exhaust gas enters the detection section 37, it is first filtered by the filter element 36. The material of the filter element 36 can be replaced as needed. For example, activated carbon can be selected as the filter material for the filter element 36. When the filtered exhaust gas passes through the sensor module 310, the content of harmful substances in it will be detected. The detection section 37 and the filter section 31 can be stacked repeatedly as needed to improve the filtration effect or detection accuracy. When the filter element 36 needs to be replaced or the sensor module 310 needs to be cleaned, it can be quickly pulled out through the pull box 33 or the mounting bracket 39 and replaced as a whole. Then, the new pull box 33 or the mounting bracket 39 is inserted to complete the replacement, improving work efficiency.

[0027] When the filtered exhaust gas is detected by the sensor module 310 in the outlet pipe 27 and still shows that it does not meet the standard, the discharge check valve 28 is closed and the return check valve 26 is opened. The unclean exhaust gas is accelerated by the duct fan 25 through the acceleration pipe 24 and then enters the expansion pipe 22 through the return pipe 23. It is then filtered again until the cleanliness of the gas in the outlet pipe 27 meets the standard before it can be discharged.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multi-stage filter for waste gas treatment, comprising a bag filter (1), characterized in that: It also includes a duct assembly (2), which is fixedly connected to the bag filter (1); and a detection assembly (3), which is fixedly connected to the duct assembly (2). The bag filter (1) has an air inlet (11) installed on one side and an air outlet (12) installed on the other side. The air pipe assembly (2) is fixedly connected to the air outlet (12). The air pipe assembly (2) includes a drooping pipe (21) fixedly connected to the air outlet (12), an expansion pipe (22) fixedly connected to the end of the drooping pipe (21), a return pipe (23) fixedly connected to the expansion pipe (22), and an acceleration pipe (24) fixedly connected to the return pipe (23).

2. The multi-stage filter for waste gas treatment according to claim 1, characterized in that: The air pipe assembly (2) includes a duct fan (25) fixedly connected to the acceleration pipe (24), a return check valve (26) fixedly connected to the acceleration pipe (24), an outlet pipe (27) fixedly connected to the acceleration pipe (24), and a discharge check valve (28) fixedly connected to the outlet pipe (27).

3. A multi-stage filter for waste gas treatment according to claim 1, characterized in that: The detection component (3) includes a filter section (31) fixedly connected to the expansion tube (22), an external flange (32) fixedly connected to the filter section (31), a pull box (33) fixedly connected to the filter section (31), a limiting groove (34) opened on the pull box (33), a pull bracket (35) slidably connected in the limiting groove (34), and a filter element (36) fixedly connected to the end of the pull bracket (35).

4. A multi-stage filter for waste gas treatment according to claim 3, characterized in that: The detection assembly (3) includes a detection section (37) fixedly connected to an external flange (32), a detection box (38) fixedly connected to the detection section (37), a mounting bracket (39) slidably connected inside the detection box (38), and a sensor module (310) fixedly connected to the mounting bracket (39).

5. A multi-stage filter for waste gas treatment according to claim 2, characterized in that: There is an angle between the direction of air intake of the return pipe (23) and the axis of the expansion pipe (22), and the diameter of the acceleration pipe (24) is smaller than that of the return pipe (23).

6. A multi-stage filter for waste gas treatment according to claim 4, characterized in that: Both ends of the filter section (31) and both ends of the detection section (37) are fixedly connected to external flanges (32). The number of filter sections (31) and detection sections (37) can be adjusted according to actual needs.

7. A multi-stage filter for waste gas treatment according to claim 4, characterized in that: The pull-out bracket (35) and the filter element (36) are a whole unit and can be replaced at the same time; the mounting bracket (39) and the sensor module (310) are a whole unit and can be replaced at the same time.

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