Filtering pipeline with waste gas detection and backflow functions

Abstract

The utility model relates to the technical field of waste gas filtering, in particular to a filtering pipeline with a waste gas detection backflow function, which comprises a gas inlet pipe, a multi-stage filtering device is fixedly connected to the lower end of the gas inlet pipe, a branch pipe is arranged on the right portion of the multi-stage filtering device, and a flow control valve is arranged in the middle of the outer surface of the branch pipe. A second sensor is arranged on the right portion of the outer surface of the branch pipe, and one end of the branch pipe is fixedly connected with a waste gas backflow detection structure. According to the filtering pipeline with the waste gas detection and backflow functions, the gas inlet pipe is connected with a multi-stage filtering device, complex industrial waste gas can be efficiently graded and purified by virtue of the filtering assembly made of various high-temperature-resistant materials, and the arranged waste gas backflow detection structure is used for detecting in real time, so that the waste gas which does not reach the standard flows back and is retreated; therefore, all accessories are cooperatively used, the waste gas treatment efficiency and the standard reaching rate are comprehensively improved, and the environmental protection requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of waste gas filtration technology, and in particular to a filter pipe with waste gas detection and reflux function. Background Technology

[0002] In modern industrial production, the waste gases generated by different industries and production processes vary greatly in composition, concentration, and temperature, and are complex and diverse. This undoubtedly places extremely high demands on the adaptability and specificity of waste gas treatment equipment. Filter pipes with waste gas detection and recirculation functions can monitor waste gas emissions in real time, which is a significant advantage. However, existing pipes have many problems. Most existing pipes use simple physical filtration or chemical adsorption, which are single filtration technologies and are difficult to effectively deal with complex industrial waste gases. The removal effect on small-diameter particulate matter and gaseous pollutants is limited, and they cannot meet the high standards of environmental protection emission requirements. In addition, when the waste gas treatment effect is poor and fails to meet the standards, there is no recirculation mechanism to send the waste gas back to the front end for reprocessing, which results in the direct discharge of non-compliant waste gas into the atmosphere, which seriously violates the current strict environmental protection requirements. Utility Model Content

[0003] The main purpose of this utility model is to provide a filter pipe with exhaust gas detection and reflux function, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A filter pipe with exhaust gas detection and reflux function includes an air inlet pipe, a multi-stage filtration device is fixedly connected to the lower end of the air inlet pipe, a branch pipe is provided on the right side of the multi-stage filtration device, a flow control valve is provided in the middle of the outer surface of the branch pipe, a second sensor is provided on the right side of the outer surface of the branch pipe, and an exhaust gas reflux detection structure is fixedly connected to one end of the branch pipe.

[0006] Preferably, the multi-stage filtration device includes a stainless steel tube, which is fixedly connected to the lower end of the air inlet pipe. The front and rear inner walls of the stainless steel tube are provided with positioning grooves that pass through to the lower end. Four ear plates are fixedly connected in a ring array on the lower outer surface of the stainless steel tube. Screws are threaded and movably connected to the middle of the end of each of the four ear plates away from the stainless steel tube. A high-temperature resistant filter component is movably inserted into two of the positioning grooves. A flange cap is snapped onto the lower end of the stainless steel tube, and a graphite sealing gasket is provided on the lower inner wall of the flange cap.

[0007] Preferably, the high-temperature resistant filter assembly includes a hollow box one, a hollow box two fixedly connected to the lower end of the hollow box one, a hollow box three fixedly connected to the lower end of the hollow box two, positioning sliders fixedly connected to the front and rear of the outer surfaces of the hollow box one, hollow box two, and hollow box three, and an access opening on the upper right side of the hollow box one, hollow box two, and hollow box three, respectively containing a high-temperature resistant metal wire mesh layer, a ceramic fiber felt layer, and a high-temperature resistant activated carbon fiber, and a pull rod fixedly connected to the lower front and lower rear of the hollow box one.

[0008] Preferably, the stainless steel pipe is detachably connected to the flange cap via four lugs and four screws, and the upper end face of the graphite gasket is tightly abutted against the lower end face of the stainless steel pipe.

[0009] Preferably, the two positioning sliders are movably inserted into the two positioning grooves respectively, the interiors of the first, second and third hollow boxes are all connected, and the lower end of the pull rod does not contact the graphite sealing gasket.

[0010] Preferably, the exhaust gas recirculation detection structure includes a combustion chamber, in which a serpentine vent pipe is installed. The left end of the serpentine vent pipe extends to the outer left side of the combustion chamber and is fixedly connected to a branch pipe. The outer surface of the serpentine vent pipe has several vertically penetrating exhaust holes. The right end of the serpentine vent pipe extends to the outer right side of the combustion chamber and is fixedly connected to a three-way connector. The outer surface of the serpentine vent pipe is equipped with a sensor three. The right side of the outer surface of the serpentine vent pipe is equipped with a control valve one. The sensor three and the control valve one are located between the combustion chamber and the three-way connector. The lower end of the three-way connector is fixedly connected to an exhaust pipe two. The middle of the outer surface of the exhaust pipe two is equipped with a solenoid valve two. The front end of the three-way connector is fixedly connected to a recirculation pipe. A booster pump is installed on the front of the outer surface of the recirculation pipe. The end of the recirculation pipe away from the three-way connector is fixedly connected to the front of the outer surface of a stainless steel pipe.

[0011] Preferably, the right side of the outer surface of the stainless steel pipe is fixedly connected to the end of the branch pipe away from the combustion chamber, an exhaust pipe is fixedly connected to the left side of the outer surface of the stainless steel pipe, a sensor is provided on the upper part of the outer surface of the exhaust pipe, a solenoid valve is provided on the right side of the outer surface of the stainless steel pipe, and a control key is fixedly connected to the front of the outer surface of the stainless steel pipe.

[0012] Preferably, the exhaust pipe and the branch pipe are located at the lower left and lower right sides of the hollow box three, respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this utility model, by using a combustion chamber to assist in the treatment of exhaust gas, some pollutants can be made to react in a high-temperature environment, thereby reducing the pollutant content. Sensors monitor exhaust gas indicators in real time, which can accurately determine whether the exhaust gas meets the standards. Control valves and solenoid valves flexibly control the exhaust gas emission path based on the monitoring results. If the exhaust gas does not meet the standards, the booster pump is started to send the exhaust gas back to the front end for further treatment, effectively preventing the direct discharge of non-compliant exhaust gas into the atmosphere. This structure ensures the effectiveness and stability of exhaust gas treatment, strictly adheres to environmental protection requirements, greatly improves the compliance rate of exhaust gas emissions, and effectively protects the ambient air quality.

[0015] 2. In this utility model, the stainless steel pipe provides a robust, stable, and high-temperature resistant structural framework, ensuring that the device can adapt to the waste gas treatment environment. The positioning groove and positioning slider cooperate to facilitate the installation and disassembly of the high-temperature resistant filter components, making maintenance and replacement convenient. In the multi-stage filter components, the high-temperature resistant metal wire mesh layer first intercepts large particulate pollutants, the ceramic fiber felt layer further filters small-diameter particles, and the high-temperature resistant activated carbon fiber adsorbs gaseous pollutants. Different materials are used for targeted treatment, significantly improving the waste gas purification effect. The design of the ear plate, screws, and flange cap enables the device to be detachably connected, and the graphite sealing gasket ensures the sealing of the connection parts, preventing waste gas leakage and ensuring the normal operation and treatment effect of the filter device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a filter pipe with exhaust gas detection and reflux function according to the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of a multi-stage filtration device with a filter pipe having a waste gas detection and reflux function according to the present invention.

[0018] Figure 3 This is a schematic diagram of the overall structure of a high-temperature resistant filter assembly for a filter pipe with exhaust gas detection and reflux function according to this utility model.

[0019] Figure 4 This is a schematic diagram of the overall structure of the exhaust gas recirculation detection of a filter pipe with exhaust gas detection and recirculation function according to the present invention.

[0020] In the diagram: 1. Intake pipe; 2. Multi-stage filtration device; 3. Exhaust pipe 1; 4. Sensor 1; 5. Solenoid valve 1; 6. Control key; 7. Branch pipe; 8. Flow control valve; 9. Sensor 2; 10. Exhaust gas recirculation detection structure; 21. Stainless steel pipe; 22. Positioning groove; 23. Ear plate; 24. Screw; 25. High-temperature resistant filter assembly; 26. Flange cap; 27. Graphite gasket; 101. Combustion chamber; 102. Serpentine vent pipe; 10 3. Vent; 104. Sensor 3; 105. Control Valve 1; 106. T-joint; 107. Exhaust Pipe 2; 108. Solenoid Valve 2; 109. Return Pipe; 110. Booster Pump; 251. Hollow Box 1; 252. Hollow Box 2; 253. Hollow Box 3; 254. Access Port; 255. High Temperature Resistant Metal Wire Mesh Layer; 256. Ceramic Fiber Felt Layer; 257. High Temperature Resistant Activated Carbon Fiber; 258. Positioning Slider; 259. Pull Rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] A filter pipe with exhaust gas detection and backflow function includes an air inlet pipe 1. A multi-stage filter device 2 is fixedly connected to the lower end of the air inlet pipe 1. A branch pipe 7 is provided on the right side of the multi-stage filter device 2. A flow control valve 8 is provided in the middle of the outer surface of the branch pipe 7. A sensor 2 9 is provided on the right side of the outer surface of the branch pipe 7. An exhaust gas backflow detection structure 10 is fixedly connected to one end of the branch pipe 7.

[0026] In this embodiment, the multi-stage filtration device 2 includes a stainless steel tube 21, which is fixedly connected to the lower end of the air inlet pipe 1. The inner wall of the stainless steel tube 21 has a positioning groove 22 with a through-hole at the lower end on both the front and rear sides. Four ear plates 23 are fixedly connected in a ring array on the lower outer surface of the stainless steel tube 21. Screws 24 are threadedly connected to the middle of the end of each ear plate 23 away from the stainless steel tube 21. A high-temperature resistant filter assembly 25 is movably inserted into both positioning grooves 22. A flange cap 26 is snapped onto the lower end of the stainless steel tube 21. A graphite sealing gasket 27 is provided on the lower inner wall of the flange cap 26. The high-temperature resistant filter assembly 25 includes a first hollow box 251, a second hollow box 252 fixedly connected to the lower end of the first hollow box 251, and a third hollow box 253 fixedly connected to the lower end of the second hollow box 252. The outer surfaces of the first hollow box 251, the second hollow box 252, and the third hollow box 253 are... Positioning sliders 258 are fixedly connected to the rear of the outer surface and the part of the cavity. The upper right side of each of the three hollow boxes (251, 252, and 253) has a removable opening 254. Each of the three hollow boxes contains a high-temperature resistant metal wire mesh layer 255, a ceramic fiber felt layer 256, and a high-temperature resistant activated carbon fiber layer 257, respectively. The lower front and lower rear of the hollow box 251 are jointly fixedly connected to a pull... Rod 259 and stainless steel tube 21 are detachably connected to flange cap 26 via four ear plates 23 and four screws 24 respectively. The upper end face of graphite gasket 27 is tightly abutted against the lower end face of stainless steel tube 21. Two positioning sliders 258 are movably inserted into two positioning grooves 22 respectively. The interiors of hollow box one 251, hollow box two 252 and hollow box three 253 are all connected. The lower end of rod 259 does not contact graphite gasket 27.

[0027] Through the above scheme: exhaust gas enters stainless steel pipe 21 from inlet pipe 1. First, the high-temperature resistant metal wire mesh layer 255 uses its interwoven metal wire structure to intercept large particulate pollutants in the first hollow box 251. Then, the exhaust gas enters the second hollow box 252, where the ceramic fiber felt layer 256 filters small-diameter particles through the inter-fiber pore structure. Finally, in the third hollow box 253, the high-temperature resistant activated carbon fiber 257 adsorbs gaseous pollutants. Each hollow box is slidably installed in the positioning groove 22 by positioning slider 258. Stainless steel pipe 21 is connected to flange cap 26 by ear plate 23 and screw 24. Graphite sealing gasket 27 ensures sealing and can be easily disassembled and replaced. Therefore, the multi-stage filtration structure can achieve efficient purification for pollutants of different particle sizes and gaseous pollutants, meeting high environmental protection standards. At the same time, each component is detachable, facilitating maintenance and replacement.

[0028] In this embodiment, the exhaust gas recirculation detection structure 10 includes a combustion chamber 101. A serpentine vent pipe 102 is installed inside the combustion chamber 101. The left end of the serpentine vent pipe 102 extends to the outer left side of the combustion chamber 101 and is fixedly connected to the branch pipe 7. Several vertically penetrating exhaust holes 103 are opened on the outer surface of the serpentine vent pipe 102. The right end of the serpentine vent pipe 102 extends to the outer right side of the combustion chamber 101 and is fixedly connected to a three-way pipe head 106. A sensor three 104 is installed on the outer surface of the serpentine vent pipe 102. A control valve one 105 is installed on the right side of the outer surface of the serpentine vent pipe 102. The sensor three 104 and the control valve one 105 are located between the combustion chamber 101 and the three-way pipe head 106. An exhaust pipe two 107 is fixedly connected to the lower end of the three-way pipe head 106. A solenoid valve 108 is installed in the middle of the outer surface of the second air pipe 107. A return pipe 109 is fixedly connected to the front end of the three-way pipe head 106. A booster pump 110 is installed in the front of the outer surface of the return pipe 109. The end of the return pipe 109 away from the three-way pipe head 106 is fixedly connected to the front of the outer surface of the stainless steel pipe 21. The right side of the outer surface of the stainless steel pipe 21 is fixedly connected to the end of the branch pipe 7 away from the combustion chamber 101. An exhaust pipe 3 is fixedly connected to the left side of the outer surface of the stainless steel pipe 21. A sensor 4 is installed in the upper part of the outer surface of the exhaust pipe 3. A solenoid valve 5 is installed in the right side of the outer surface of the stainless steel pipe 21. A control key 6 is fixedly connected to the front of the outer surface of the stainless steel pipe 21. The exhaust pipe 3 and the branch pipe 7 are located in the lower left and lower right parts of the hollow box 253, respectively.

[0029] Through the above scheme: after the exhaust gas is treated by the stainless steel pipe 21, part of it enters the serpentine ventilation pipe 102 through the branch pipe 7. The sensor 3 104 monitors the exhaust gas indicators in real time. If the indicators do not meet the standards, the control valve 105 closes the solenoid valve 2 108 on the exhaust pipe 2 107. At the same time, the booster pump 110 starts and sends the exhaust gas back to the front end of the stainless steel pipe 21 through the return pipe 109 for further treatment. If the indicators meet the standards, the solenoid valve 2 108 is opened and the exhaust gas is discharged from the exhaust pipe 2 107. At the stainless steel pipe 21, the sensor 4 can monitor again, and the solenoid valve 5 controls the exhaust gas discharge. Therefore, by working together with the sensors, valves and pumps, it is ensured that the non-compliant exhaust gas will not be directly discharged into the atmosphere, strictly complying with environmental protection requirements. By re-processing through return flow, the exhaust gas treatment effect is improved, and the exhaust gas emission is guaranteed to meet the current strict environmental protection standards.

[0030] It should be noted that this utility model is a filter pipe with exhaust gas detection and reflux function. In use, exhaust gas first enters the stainless steel pipe 21 of the multi-stage filter device 2 from the inlet pipe 1. The exhaust gas comes into contact with the high-temperature resistant metal wire mesh layer 255 in the hollow box 251 of the high-temperature resistant filter component 25, where large particulate pollutants are initially intercepted. Then, the exhaust gas passes through the ceramic fiber felt layer 256 in the hollow box 252 to filter small-diameter particles. It then enters the hollow box 3 253, where gaseous pollutants are adsorbed by the high-temperature resistant activated carbon fiber 257. After preliminary filtration, part of the exhaust gas passes through the branch pipe 7. After the flow rate is adjusted by the flow control valve 8 and some indicators are monitored by the sensor 2 9, it enters the serpentine structure of the exhaust gas reflux detection structure 10. Inside the vent pipe 102, and outside the serpentine vent pipe 102, sensor 3 104 can further monitor the exhaust gas. If the standard is met, control valve 1 105 opens solenoid valve 2 108, and the exhaust gas is discharged from exhaust pipe 2 107. If the standard is not met, solenoid valve 2 108 is closed, and booster pump 110 sends the exhaust gas back to the front end of stainless steel pipe 21 through return pipe 109 for further treatment. In addition, sensor 4 and solenoid valve 5 outside stainless steel pipe 21 can monitor and control the exhaust gas emission again. Therefore, the filter pipeline works in concert with the air inlet pipe 1, multi-stage filter device 2, and exhaust gas return detection structure 10 to achieve primary to deep filtration of complex industrial exhaust gas, and can return and re-treat exhaust gas that does not meet the standard, effectively improving the exhaust gas treatment effect and meeting strict environmental protection requirements.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A filter pipe with exhaust gas detection and reflux function, comprising an air inlet pipe (1), characterized in that: The lower end of the intake pipe (1) is fixedly connected to a multi-stage filter device (2). A branch pipe (7) is provided on the right side of the multi-stage filter device (2). A flow control valve (8) is provided in the middle of the outer surface of the branch pipe (7). A sensor (9) is provided on the right side of the outer surface of the branch pipe (7). A waste gas recirculation detection structure (10) is fixedly connected to one end of the branch pipe (7). The multi-stage filtration device (2) includes a stainless steel tube (21), which is fixedly connected to the lower end of the air inlet pipe (1). The front and rear inner walls of the stainless steel tube (21) are provided with positioning grooves (22) through which the lower end passes. Four ear plates (23) are fixedly connected in a ring array on the lower outer surface of the stainless steel tube (21). Screws (24) are threaded and movably connected to the middle of the end of each of the four ear plates (23) away from the stainless steel tube (21). A high-temperature resistant filter assembly (25) is movably inserted into the two positioning grooves (22). A flange cap (26) is snapped onto the lower end of the stainless steel tube (21). A graphite sealing gasket (27) is provided on the lower inner wall of the flange cap (26).

2. A filter pipe with exhaust gas detection and reflux function according to claim 1, characterized in that: The high-temperature resistant filter assembly (25) includes a hollow box one (251), a hollow box two (252) fixedly connected to the lower end of the hollow box one (251), a hollow box three (253) fixedly connected to the lower end of the hollow box two (252), and positioning sliders (258) fixedly connected to the front and rear of the outer surfaces of the hollow box one (251), hollow box two (252), and hollow box three (253). 1) Both the upper right side of the hollow box 2 (252) and the hollow box 3 (253) have an opening (254) for removal. The hollow box 1 (251), the hollow box 2 (252) and the hollow box 3 (253) are respectively filled with a high temperature resistant metal wire mesh layer (255), a ceramic fiber felt layer (256) and a high temperature resistant activated carbon fiber (257). The lower front and lower rear of the hollow box 1 (251) are fixedly connected with a pull rod (259).

3. A filter pipe with exhaust gas detection and reflux function according to claim 1, characterized in that: The stainless steel pipe (21) is detachably connected to the flange cap (26) by four ear plates (23) and four screws (24), and the upper end face of the graphite gasket (27) is tightly abutted against the lower end face of the stainless steel pipe (21).

4. A filter pipe with exhaust gas detection and reflux function according to claim 2, characterized in that: The two positioning sliders (258) are respectively located in the two positioning grooves (22) and are movably inserted. The interiors of the first hollow box (251), the second hollow box (252) and the third hollow box (253) are all connected. The lower end of the pull rod (259) does not contact the graphite sealing gasket (27).

5. A filter pipe with exhaust gas detection and reflux function according to claim 1, characterized in that: The exhaust gas recirculation detection structure (10) includes a combustion chamber (101), a serpentine vent pipe (102) is provided inside the combustion chamber (101), the left end of the serpentine vent pipe (102) extends to the outer left side of the combustion chamber (101) and is fixedly connected to a branch pipe (7), the outer surface of the serpentine vent pipe (102) has several vertically penetrating air outlets (103), the right end of the serpentine vent pipe (102) extends to the right side of the combustion chamber (101) and is fixedly connected to a three-way pipe head (106), a sensor three (104) is provided on the outer surface of the serpentine vent pipe (102), and the outer surface of the serpentine vent pipe (102) has a three-way pipe head (106). A control valve (105) is provided on the right side of the surface. The sensor (104) and the control valve (105) are located between the combustion chamber (101) and the three-way pipe head (106). The lower end of the three-way pipe head (106) is fixedly connected to the exhaust pipe (107). The middle of the outer surface of the exhaust pipe (107) is provided with a solenoid valve (108). The front end of the three-way pipe head (106) is fixedly connected to the return pipe (109). A booster pump (110) is provided on the front of the outer surface of the return pipe (109). The end of the return pipe (109) away from the three-way pipe head (106) is fixedly connected to the front of the outer surface of the stainless steel pipe (21).

6. A filter pipe with exhaust gas detection and reflux function according to claim 1, characterized in that: The outer right side of the stainless steel pipe (21) is fixedly connected to the end of the branch pipe (7) away from the combustion chamber (101). An exhaust pipe (3) is fixedly connected to the outer left side of the stainless steel pipe (21). A sensor (4) is provided on the upper part of the outer surface of the exhaust pipe (3). A solenoid valve (5) is provided on the outer right side of the stainless steel pipe (21). A control key (6) is fixedly connected to the front of the outer surface of the stainless steel pipe (21).

7. A filter pipe with exhaust gas detection and reflux function according to claim 6, characterized in that: The exhaust pipe (3) and the branch pipe (7) are located on the lower left and lower right sides of the hollow box (253), respectively.

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