Waste gas pretreatment equipment and waste gas treatment method using the equipment

Abstract

The present application relates to the field of waste gas treatment, and in particular to a waste gas pretreatment device and a waste gas treatment method using the device, comprising a box body, an air inlet is provided at one end of the box body, and an air outlet is provided at the other end, the air inlet and the air outlet are connected to form an air flow channel, a filtering device is provided on the box body, the filtering device comprises a cleaning mechanism and a filtering mechanism, the filtering mechanism comprises a first filter screen and a second filter screen, the first filter screen and the second filter screen are installed on the box body along the same straight line, and the first filter screen and the second filter screen are connected, and the first filter screen and the second filter screen have only one and only one used to filter the waste gas at the same time, the cleaning mechanism is installed on the side wall of the box body, and the cleaning mechanism is used to clean the part of the filtering mechanism located outside the box body, the present application improves the problem of inconvenient cleaning of the filter screen in the traditional method, and can achieve the effect of convenient cleaning of the filter screen.

Description

Technical Field

[0001] The present application relates to the field of waste gas treatment, and in particular to a waste gas pretreatment device and a waste gas treatment method using the device. Background Art

[0002] The regenerative thermal incinerator, also known as the regenerative oxidizer, is a highly efficient organic waste gas treatment equipment. The organic waste gas is heated to a high temperature by an electric heater, so that the volatile organic matter in the waste gas is oxidized and decomposed into carbon dioxide and water at high temperature, thereby purifying the waste gas. The heat generated by oxidation is stored in a special ceramic heat storage body, which is then used to preheat the subsequent organic waste gas, saving the energy consumption required for the heating process and improving the thermal efficiency of the entire system.

[0003] Before the exhaust gas enters the regenerative thermal incinerator, it will be pre-treated to filter out large particles of dust and impurities in the exhaust gas. Usually, a filter net is used to filter the exhaust gas.

[0004] However, in the traditional method, the filter is installed in the pipeline equipment. After the filter has been used for a period of time, the particles accumulated on the filter will clog the filter holes on the filter, thereby reducing the amount of exhaust gas passing through. At this time, the exhaust gas treatment system needs to be shut down and the filter removed for cleaning in order to continue to pre-treat the exhaust gas. However, the removal and cleaning of the filter is usually troublesome, and the shutdown and removal also reduces the efficiency of exhaust gas treatment. Summary of the invention

[0005] In order to facilitate the cleaning of the filter screen, the present application provides an exhaust gas pretreatment device and an exhaust gas treatment method using the device.

[0006] In the first aspect, the present application provides an exhaust gas pretreatment device, which adopts the following technical solution:

[0007] A waste gas pretreatment device comprises a box body, one end of the box body is provided with an air inlet, and the other end is provided with an air outlet, the air inlet and the air outlet are connected to form an air flow channel, the box body is provided with a filtering device, the filtering device comprises a cleaning mechanism and a filtering mechanism, the filtering mechanism comprises a first filter screen and a second filter screen for filtering the waste gas, the first filter screen and the second filter screen are installed on the box body along the same straight line, and the first filter screen and the second filter screen are connected, and the straight line where the first filter screen and the second filter screen are located is perpendicular to the axis of the box body, and at the same time, only one of the first filter screen and the second filter screen is used to filter the waste gas, the cleaning mechanism is installed at the side wall of the box body, and the cleaning mechanism is used to clean the part of the filtering mechanism located outside the box body.

[0008] By adopting the above technical solution, a filtering device is arranged on the box body, and the exhaust gas is filtered only through the first filter screen or the second filter screen at the same time. After the first filter screen has been used for a period of time, the first filter screen is pushed out of the box body and cleaned by a cleaning mechanism. At the same time, the second filter screen is pushed into the box body to continue filtering the exhaust gas, thereby facilitating the alternating filtration of the exhaust gas through the first filter screen and the second filter screen, thereby facilitating the cleaning of the first filter screen or the second filter screen, and there is no need to shut down the exhaust gas treatment system, thereby facilitating improving the efficiency of exhaust gas treatment.

[0009] In a specific feasible implementation scheme, a switching hole is provided on the box body for the first sealing frame and the second sealing frame to pass through, and the switching hole penetrates the box body in an axial direction perpendicular to the box body. The filtering mechanism also includes a first sealing frame and a second sealing frame. The first filter net is installed in the first sealing frame, and the second filter net is installed on the second sealing frame. The first sealing frame and the second sealing frame are connected by a connecting rod. The first sealing frame and the second sealing frame are used to isolate the switching hole on the box body from the air flow channel. The filtering device also includes a first cleaning box for storing the first sealing frame and a second cleaning box for storing the second sealing frame. The first cleaning box is installed at the switching hole on one side of the box body, and the second cleaning box is installed at the switching hole on the other side of the box body. Cleaning mechanisms for cleaning the filtering mechanism are installed in the first cleaning box and the second cleaning box.

[0010] By adopting the above technical solution, after the first filter in the first sealing frame has been used for a period of time, the first sealing frame is transported to the first cleaning box, and the first filter is cleaned by the cleaning mechanism. At this time, the second filter filters the waste gas in the box. After the second filter has been used for a period of time, the second sealing frame is transported to the second cleaning box, and the second filter is cleaned by the cleaning mechanism. At the same time, the first filter filters the waste gas in the box, thereby facilitating the action of alternately filtering the waste gas by the first filter and the second filter.

[0011] In a specific feasible implementation scheme, the cleaning mechanism includes a first module installed on a first cleaning box and a second module installed on a second cleaning box, the first module is connected to the first sealing frame, the second module is connected to the second sealing frame, the first module includes a cleaning component, a control component, a lifting component and a driving component, the driving component includes a driving motor, a gear and a rack, the rack is installed on the bottom wall of the first sealing frame, the gear is installed in the first cleaning box at one end close to the box body, and the gear is located below the rack, and the gear is used to engage with the rack, the driving motor is installed on the first cleaning box, and the output shaft of the driving motor is coaxially connected to the gear, the lifting component and the cleaning component are both installed in the first cleaning box, and the cleaning component is connected to the lifting component, the control component is installed in the first cleaning box, and the control component connects the cleaning component to the first sealing frame.

[0012] By adopting the above technical solution, after the first filter screen has been used for a period of time, the first sealing frame is transported to the first cleaning box, the rack is meshed with the gear, and then the gear is driven to rotate by the driving motor, thereby driving the rack to move away from the box body, thereby driving the first sealing frame to completely enter the first cleaning box, so that the first sealing frame drives the cleaning component to approach the first filter screen through the control component, and at the same time drives the cleaning component to move along the surface of the first filter screen through the lifting component, thereby facilitating the cleaning of the first filter screen.

[0013] In a specific feasible implementation scheme, the cleaning assembly includes a bracket and a cleaning brush, the bracket is installed in the first cleaning box, and the bracket is connected to the lifting assembly, the cleaning brush is slidably installed on the side of the bracket close to the first sealing frame through a guide rod, and the axis of the guide rod is perpendicular to the axis of the rack, and one end of the guide rod extends into the bracket, and a spring is also installed at one end of the guide rod located in the bracket, one end of the spring is connected to the side wall of the guide rod, and the other end of the spring is connected to the inner wall of the bracket, the guide rod is connected to the control assembly, and the cleaning brush is used to clean the first filter on the first sealing frame.

[0014] By adopting the above technical solution, when cleaning the first filter, the first sealing frame drives the control component to move, so that the control component pushes the guide rod, so that the guide rod drives the cleaning brush to move to the surface of the first filter, thereby facilitating the cleaning of particles on the first filter by the cleaning brush.

[0015] In a specific feasible implementation scheme, a dust suction port is provided on the side wall of the cleaning brush on the side close to the first filter, a connecting port is provided on the top wall of the cleaning brush, the connecting port is connected to the dust suction port, a dust suction tube is installed on the top wall of the cleaning brush at the connecting port, the dust suction tube passes through the first cleaning box and extends outward, and a first vacuum cleaner is installed on the end of the dust suction tube away from the cleaning brush.

[0016] By adopting the above technical solution, when the cleaning brush cleans the surface of the first filter, the first vacuum cleaner sucks the cleaned particles out of the first cleaning box through the suction port, thereby facilitating the collection of the particles.

[0017] In a specific possible implementation scheme, the control assembly includes a pressure plate, a connecting rod, a push rod and a first lifting member, the pressure plate is slidably installed in the first cleaning box along the axial direction of the rack through a sliding rod, and the pressure plate is located at one end of the first cleaning box away from the box body, a pressure spring is installed on the sliding rod, one end of the pressure spring is in contact with the side wall of the pressure plate, and the other end is in contact with the inner wall of the first cleaning box, the connecting rod is slidably installed on the bracket along a length direction perpendicular to the bracket, and one end of the connecting rod extends to the pressure plate, and a first extrusion slope for contacting the connecting rod is provided on the side of the pressure plate close to the connecting rod, and the connecting rod is located in the first cleaning box. A guide spring is installed at one end outside the bracket, one end of the guide spring is connected to the side wall of the connecting rod, and the other end is connected to the side wall of the bracket. The push rod is slidably installed on the bracket along the length direction of the bracket, and one end of the push rod extends to the connecting rod, and the other end extends to the guide rod. The connecting rod is provided with a first pushing inclined surface at one end close to the push rod, and a first interference inclined surface is provided at one end of the push rod close to the guide rod. A pushing spring is also installed on the push rod, one end of the push spring is connected to the side wall of the push rod, and the other end is connected to the inner wall of the bracket. The first lifting member is installed on the bracket, and the first lifting member is used to lift the connecting rod.

[0018] By adopting the above technical solution, the pressure plate is pushed by the first sealing frame, so that the pressure plate pushes the connecting rod in the direction of the push rod through the first extrusion slope, so that the first pushing slope on the connecting rod pushes the push rod in the direction of the guide rod, and the first interference slope on the push rod moves the guide rod in the direction of the first sealing frame, thereby facilitating the cleaning brush to approach the first filter screen, thereby facilitating the cleaning of the first filter screen.

[0019] In a specific possible implementation scheme, the first lifting member includes a lifting plate and a lifting rod, the lifting plate is slidably installed on the bracket in the vertical direction, and the lifting plate is located below the connecting rod, and the lifting plate is used to resist the bottom wall of the connecting rod, the lifting rod is installed on the bottom wall of the lifting plate in the vertical direction, and the lifting rod passes downward through the bottom wall of the bracket, a lifting spring is installed on the lifting rod, one end of the lifting spring is connected to the bottom wall of the bracket, and the other end is connected to the side wall of the lifting rod, a limiting plate is installed at the lower end of the inner wall of the first cleaning box, the limiting plate is located below the lifting rod and at the lower end of the pressure plate, and the top wall of the limiting plate is used to resist the lower end of the lifting rod.

[0020] By adopting the above technical solution, when the lifting assembly drives the cleaning assembly to descend to the limit plate, the cleaning assembly completes the cleaning of the first filter screen. At the same time, the lifting rod contacts the limit plate, so that the lifting rod drives the lifting plate to push the connecting rod upward, so that the connecting rod is separated from the push rod, thereby facilitating the resetting of the push rod, thereby facilitating the guide rod to drive the cleaning brush to reset, thereby facilitating the separation of the cleaning brush from the first filter screen, thereby facilitating the first filter screen to be moved back into the box.

[0021] In a specific implementation scheme, the first lifting includes a lifting motor and a screw rod, the screw rod is installed in the first cleaning box along the vertical direction, the lifting motor is installed on the top wall of the first cleaning box, and the output shaft of the lifting motor is coaxially connected to the upper end of the screw rod, and one end of the bracket is threadedly connected to the screw rod.

[0022] By adopting the above technical solution, the lifting motor drives the screw rod to rotate, so that the screw rod drives the bracket to move up and down in the vertical direction, thereby facilitating the cleaning brush to clean the first filter.

[0023] In a second aspect, the present application provides a waste gas treatment method using a waste gas pretreatment device, which adopts the following technical solution:

[0024] An exhaust gas treatment system using an exhaust gas pretreatment device comprises the following steps:

[0025] Exhaust gas pretreatment, passing the exhaust gas into the exhaust gas pretreatment equipment, and using the exhaust gas pretreatment equipment to filter particulate matter in the exhaust gas;

[0026] Preheating the furnace body, raising the temperature of the oxidation chamber and the regenerator in the regenerative incinerator through an electric heater;

[0027] Waste gas treatment: the filtered waste gas is passed into a regenerative incinerator for oxidation treatment;

[0028] Heat recovery allows the oxidized gas to flow through the regenerator in the regenerative incinerator, transferring heat to the ceramic regenerator to preheat the subsequent exhaust gas.

[0029] In a specific embodiment, in the exhaust gas treatment step, the exhaust gas is subjected to three cycles of oxidation treatment.

[0030] By adopting the above technical solution, the exhaust gas is subjected to three cycles of oxidation treatment, thereby conveniently improving the treatment effect of the exhaust gas.

[0031] In summary, the present application includes at least one of the following beneficial effects:

[0032] 1. The present application provides a cleaning mechanism to clean the first filter or the second filter, thereby facilitating the cleaning of the first filter or the second filter after use.

[0033] 2. The present application reduces the time required for downtime maintenance of the first filter or the second filter by alternately filtering the exhaust gas with the first filter or the second filter, thereby facilitating improving the exhaust gas treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the exhaust gas pretreatment equipment of this application.

[0035] Figure 2 It is a cross-sectional view of the box body in the embodiment of the present application.

[0036] Figure 3 It is a structural diagram of the first module in the embodiment of the present application.

[0037] Figure 4 It is an exploded view of the drive assembly in the embodiment of the present application.

[0038] Figure 5 It is a cross-sectional view of the bracket in the embodiment of the present application.

[0039] Figure 6 It is a cross-sectional view of the cleaning brush in the embodiment of the present application.

[0040] Figure 7 It is a schematic diagram of the installation of the lifting member in the embodiment of the present application.

[0041] Figure 8 It is a structural schematic diagram of the equipment in the waste gas treatment method of this application.

[0042] Fig. 9 It is a structural schematic diagram of the regenerative incinerator in the embodiment of the present application.

[0043] Description of reference numerals:

[0044] 1. Box body; 11. Air inlet; 12. Air outlet; 13. Switching hole; 2. Filter device; 21. Cleaning mechanism; 211. Cleaning assembly; 2111. Bracket; 21111. Unlocking slot; 2112. Cleaning brush; 2113. Guide rod; 2114. Spring; 2115. Dust suction port; 2116. Connecting port; 2117. Dust suction pipe; 212. Control assembly; 2121. Pressing plate; 2122. Sliding rod; 2123. Pressure spring; 2124. Connecting rod; 2125. Guide spring; 2126. Push rod; 2127. Push spring; 2128. Lifting plate; 2129. Lifting rod; 21210. Lifting spring; 21211. Limiting plate; 213. Lifting assembly; 2131. Lifting motor ; 2132, screw rod; 214, drive assembly; 2141, drive motor; 2142, gear; 2143, rack; 22, filter mechanism; 221, first filter screen; 222, first sealing frame; 223, second filter screen; 224, second sealing frame; 225, connecting rod; 226, first push rod; 227, second push rod; 23, first cleaning box; 24, second cleaning box; 3, main pipeline; 4, main fan; 5, regenerative incinerator; 51, regenerative chamber; 511, No. 1 regenerative chamber; 512, No. 2 regenerative chamber; 513, No. 3 regenerative chamber; 514, first air pipe; 515, second air pipe; 516, third air pipe; 52, oxidation chamber; 53, electric heater; 6, auxiliary pipeline; 7, exhaust pipe. DETAILED DESCRIPTION

[0045] The present application is further described in detail below in conjunction with the accompanying drawings.

[0046] The present application discloses an exhaust gas pretreatment device, referring to Figure 1 and Figure 2 , comprising a housing 1, an air inlet 11 being provided at one end of the housing 1, and an air outlet 12 being provided at the other end, the air inlet 11 being connected with the air outlet 12 to form an air flow channel. A filter device 2 is also installed on the housing 1, the filter device 2 comprises a cleaning mechanism 21 and a filter mechanism 22, both of which are installed on the housing 1, and the filter mechanism 22 is used to filter the exhaust gas entering the housing 1, and the cleaning mechanism 21 is used to clean the filtering components in the filter mechanism 22, so that the filter mechanism 22 can continuously filter the exhaust gas.

[0047] Reference Figure 2 and Figure 3The filtering mechanism 22 includes a first filter screen 221, a first sealing frame 222, a second filter screen 223 and a second sealing frame 224. The first filter screen 221 is embedded in the first sealing frame 222, and the second filter screen 223 is embedded in the second sealing frame 224. The first sealing frame 222 and the second sealing frame 224 are connected by a connecting rod 225, and the first sealing frame 222 and the second sealing frame 224 are connected to form a straight line. The size structure of the first sealing frame 222 and the second sealing frame 224 is the same, the size structure of the first filter screen 221 and the second filter screen 223 is the same, and the cross-sectional dimensions of the first filter screen 221 and the second filter screen 223 are the same as the cross-sectional dimensions of the airflow channel. The cross-sectional dimensions of the first sealing frame 222 and the second sealing frame 224 are both larger than the cross-sectional dimensions of the airflow channel, and the length of the connecting rod 225 satisfies that when the second filter screen 223 is consistent with the airflow channel, the first sealing frame 222 is completely located outside the box body 1. A switching hole 13 for sliding the first sealing frame 222 and the second sealing frame 224 is provided on the side wall of the box body 1 . The switching hole 13 penetrates the box body 1 in a direction perpendicular to the axis of the box body 1 , and the side wall of the first sealing frame 222 or the second sealing frame 224 just fits with the inner wall of the switching hole 13 .

[0048] Reference Figure 1 and Figure 3 The filtering device 2 also includes a first cleaning box 23 and a second cleaning box 24. The first cleaning box 23 and the second cleaning box 24 have the same structural shape and size, and the first cleaning box 23 and the second cleaning box 24 are respectively fixedly installed on both sides of the axis of the box body 1, and the first cleaning box 23 and the second cleaning box 24 are located on the same straight line, and the first cleaning box 23 and the second cleaning box 24 are both located at the switching hole 13 of the box body 1, and the first cleaning box 23 and the second cleaning box 24 are both connected to the switching hole 13.

[0049] Reference Figure 1 and Figure 3 The cleaning mechanism 21 includes a first module and a second module. The second module is disposed on the second cleaning box 24 and is connected to the second sealing frame 224. Figure 3 and Figure 4The first module includes a cleaning component 211, a control component 212, a lifting component 213 and a driving component 214. The driving component 214 includes a driving motor 2141, a gear 2142 and a rack 2143. The rack 2143 is fixedly mounted on the bottom wall of the first sealing frame 222 along an axial direction perpendicular to the box body 1. The driving motor 2141 is fixedly mounted on the outer wall of the first cleaning box 23 at one end close to the box body 1, and the driving motor 2141 is located at the lower end of the first cleaning box 23, and the output pump of the driving motor 2141 passes through the side wall of the first cleaning box 23 and extends into the first cleaning box 23. The gear 2142 is coaxially mounted on the output shaft of the driving motor 2141, and the gear 2142 is located below the rack 2143, and the gear 2142 is used to engage with the rack 2143.

[0050] Reference Figure 3 and Figure 4 The lifting assembly 213 includes a lifting motor 2131 and a screw rod 2132. The screw rod 2132 is rotatably installed on the first cleaning box 23 along the vertical direction, and the screw rod 2132 is located at one end of the first cleaning box 23 away from the box body 1. The lifting motor 2131 is fixedly installed on the top wall of the first cleaning box 23, and the output shaft of the lifting motor 2131 is coaxially connected to the upper end of the screw rod 2132.

[0051] Reference Figure 3 and Figure 4 The cleaning assembly 211 includes a bracket 2111 and a cleaning brush 2112. The cross-section of the bracket 2111 is L-shaped, including a long side and a short side. The short side of the bracket 2111 is slidably installed in the first cleaning box 23 away from the box body 1 along the vertical direction, and the end of the bracket 2111 close to the screw rod 2132 is threadedly connected to the screw rod 2132, and the side wall of the short side of the bracket 2111 away from the long side is in contact with the inner wall of the first cleaning box 23, so that the bracket 2111 can only move in the vertical direction. The cleaning brush 2112 is slidably installed on the bracket 2111 along the horizontal direction through the guide rod 2113, and the sliding path of the cleaning brush 2112 is perpendicular to the axis of the long side of the bracket 2111, and the cleaning brush 2112 is located between the first sealing frame 222 and the bracket 2111, and the guide rod 2113 passes through the side wall of the bracket 2111 and extends into the bracket 2111, three guide rods 2113 are provided, and are arranged in parallel between the cleaning brush 2112 and the bracket 2111, and a first baffle is provided at the end of the middle guide rod 2113, and a spring 2114 is sleeved on the guide rod 2113, the spring 2114 is located in the bracket 2111, and a space for accommodating the spring 2114 is provided in the bracket 2111, one end of the spring 2114 is in contact with the side wall of the first baffle on the guide rod 2113, and the other end is in contact with the inner wall of the bracket 2111.

[0052] Reference Figure 5 and Figure 6 A dust suction port 2115 is provided on the side wall of the cleaning brush 2112 near the first sealing frame 222, and a connecting port 2116 is provided on the top wall of the cleaning brush 2112. The connecting port 2116 is connected to the dust suction port 2115, and a dust suction pipe 2117 is fixedly installed on the connecting port 2116. The dust suction pipe 2117 adopts a flexible corrugated pipe. Figure 1 and Figure 5 One end of the dust suction pipe 2117 passes through the side wall of the first cleaning box 23 and extends outward, and a first dust collector is fixedly installed at one end of the dust suction pipe 2117 outside the first cleaning box 23. The first dust collector is a prior art in the art and will not be described in detail here. A ventilation hole (not shown in the figure) is also provided on the side wall of the first cleaning box 23. The ventilation hole is used to allow air to enter the first cleaning box 23 so as to maintain the pressure balance in the first cleaning box 23.

[0053] Reference Figure 3 and Figure 5 The control component 212 includes a pressure plate 2121, a connecting rod 2124, a push rod 2126 and a first lifting member. The pressure plate 2121 is slidably installed in the first cleaning box 23 along the axial direction of the rack 2143 through the sliding rod 2122, and the pressure plate 2121 is located at the end of the first cleaning box 23 away from the box body 1, and the pressure plate 2121 and the first sealing frame 222 are located on the same plane, and the first push rod 226 for contacting the pressure plate 2121 is fixedly installed on the side wall of the first sealing frame 222 close to the pressure plate 2121, and a pressure spring 2123 is installed on the sliding rod 2122, one end of the pressure spring 2123 contacts the side wall of the pressure plate 2121, and the other end contacts the inner wall of the first cleaning box 23. The connecting rod 2124 is slidably mounted on the short side of the bracket 2111 along the axial direction of the short side of the bracket 2111, and one end of the connecting rod 2124 extends toward the direction of the pressing plate 2121. A first stopper is fixedly mounted on the side wall of the connecting rod 2124 located outside the bracket 2111, and a guide spring 2125 is mounted on one end of the connecting rod 2124 located outside the bracket 2111, one end of the guide spring 2125 abuts against the side wall of the first stopper, and the other end abuts against the side wall of the bracket 2111. A first extrusion slope is provided at one end of the pressing plate 2121 close to the connecting rod 2124, and the first extrusion slope is used to abut against the end of the connecting rod 2124. A first pushing slope is provided at one end of the connecting rod 2124 located inside the bracket 2111.

[0054] Reference Figure 5The push rod 2126 is slidably installed in the bracket 2111 along the length direction of the long side of the bracket 2111. One end of the push rod 2126 extends to the connecting rod 2124, and the other end extends to the guide rod 2113 equipped with the spring 2114. The end of the push rod 2126 close to the guide rod 2113 is provided with a first abutting inclined surface, and the first abutting inclined surface is used to abut the first baffle at the end of the guide rod 2113. A first positioning plate is fixedly installed on the side wall of the end of the push rod 2126 away from the connecting rod 2124. A push spring 2127 is also installed on the push rod 2126 near the first positioning plate. One end of the push spring 2127 is fixedly connected to the side wall of the first positioning plate, and the other end is fixedly connected to the inner wall of the bracket 2111.

[0055] Reference Figure 3 and Figure 7 The first lifting member includes a lifting plate 2128 and a lifting rod 2129. An unlocking groove 21111 is provided on the side wall of the end of the short side of the bracket 2111. The unlocking groove 21111 extends from the end of the short side of the bracket 2111 to the end of the push rod 2126, and the connecting rod 2124 is located in the unlocking groove 21111, and the height of the unlocking groove 21111 is greater than the sum of the thicknesses of the push rod 2126 and the connecting rod 2124. The lifting plate 2128 is slidably installed in the unlocking groove 21111 on the bracket 2111 along the vertical direction, and the lifting plate 2128 is located below the connecting rod 2124. The lifting rod 2129 is fixedly mounted on the bottom wall of the lifting plate 2128 in the vertical direction, and the lower end of the lifting rod 2129 extends downward to pass through the bottom wall of the bracket 2111, and a first stop plate is fixedly mounted on the lower end of the lifting rod 2129. A lifting spring 21210 is also mounted on the lifting rod 2129, one end of the lifting spring 21210 abuts against the top wall of the first stop plate, and the other end abuts against the bottom wall of the bracket 2111. A limit plate 21211 is fixedly mounted on the inner side wall of the first cleaning box 23 at the lower end of the pressing plate 2121, the limit plate 21211 is located below the rack 2143, and the limit plate 21211 is used to abut against the first stop plate.

[0056] Reference Figure 1 and Figure 3 When the first filter screen 221 filtering in the box body 1 needs to be cleaned, the second sealing frame 224 is transported from the second cleaning box 24 to the box body 1 through the second module, so that the second filter screen 223 in the second sealing frame 224 fits with the air flow channel, and the side wall of the second sealing frame 224 fits with the inner wall of the switching hole 13, thereby achieving the sealing of the air flow channel. Figure 3 and Figure 4When the second sealing frame 224 moves from the second cleaning box 24 to the box body 1, the first sealing frame 222 moves toward the first cleaning box 23, so that the rack 2143 is meshed with the gear 2142. At the same time, the driving motor 2141 drives the gear 2142 to rotate forward, so that the gear 2142 drives the rack 2143 to move toward the pressing plate 2121. Figure 3 and Figure 5 When the second sealing frame 224 moves to make the second filter screen 223 coincide with the air flow channel, the first push rod 226 at the end of the first sealing frame 222 pushes the pressure plate 2121, so that the pressure plate 2121 compresses the pressure spring 2123, and makes the first extrusion slope on the pressure plate 2121 contact the end of the connecting rod 2124, and pushes the connecting rod 2124 in the direction of the push rod 2126 and compresses the guide spring 2125, so that the first pushing slope at the end of the connecting rod 2124 contacts the end of the push rod 2126, thereby pushing the push rod 2126 in the direction of the guide rod 2113 and stretching the pushing spring 2127, so that the first contact slope at the end of the push rod 2126 contacts the first baffle on the guide rod 2113, thereby pushing the guide rod 2113 upward in the direction away from the push rod 2126 and compressing the spring 2114, thereby driving the cleaning brush 2112 to move to fit the side wall of the first filter screen 221 on the first sealing frame 222.

[0057] Reference Figure 3 and Figure 6 , and then the lifting motor 2131 drives the screw rod 2132 to rotate forward, so that the screw rod 2132 drives the bracket 2111 to move downward along the surface of the first filter screen 221, thereby driving the cleaning brush 2112 to clean the surface of the first filter screen 221 from top to bottom, and in the cleaning process, the particles are sucked by the first vacuum cleaner arranged outside the first cleaning box 23, so that the particles enter the dust suction pipe 2117 from the dust suction port 2115 on the side wall of the cleaning brush 2112, and are finally collected by the first vacuum cleaner.

[0058] Reference Figure 3 and Figure 7When the screw rod 2132 drives the bracket 2111 to descend to the limit plate 21211, the cleaning brush 2112 just moves to the lower end of the first filter screen 221, and then, the lifting rod 2129 contacts the top wall of the limit plate 21211, so that the lifting rod 2129 drives the lifting plate 2128 to move upward and compress the lifting spring 21210, so that the lifting plate 2128 pushes the connecting rod 2124 upward, so that the end of the connecting rod 2124 moves along the end of the push rod 2126. Move upward and pass over the end of the push rod 2126, so that the push rod 2126 slides and resets in the direction of the connecting rod 2124 under the action of the push spring 2127, so that the end of the push rod 2126 moves to the bottom of the connecting rod 2124, and the guide rod 2113 drives the cleaning brush 2112 to move and reset in the direction of the bracket 2111 under the action of the spring 2114, thereby separating the cleaning brush 2112 from the first filter screen 221, thereby facilitating the movement of the first filter screen 221.

[0059] Reference Figure 3 and Figure 4 When the first filter screen 221 needs to be sent back to the box body 1, the gear 2142 is driven by the driving motor 2141 to rotate in the opposite direction, thereby driving the rack 2143 to move away from the pressing plate 2121, thereby driving the first sealing frame 222 to move along the switching hole 13 into the box body 1, so as to use the first filter screen for filtering again. Figure 3 and Figure 5 When the first sealing frame 222 moves to separate the first push rod 226 from the pressure plate 2121, the pressure plate 2121 is reset under the action of the pressure spring 2123, so that the pressure plate 2121 moves away from the connecting rod 2124, so that the pressure plate 2121 is separated from the connecting rod 2124, so that the connecting rod 2124 is reset under the action of the guide spring 2125, so that the connecting rod 2124 moves toward the pressure plate 2121, so that the end of the connecting rod 2124 close to the push rod 2126 moves away from the push rod 2126 and is separated from the push rod 2126. Figure 3 and Figure 7 , and then the lifting motor 2131 drives the screw rod 2132 to rotate in the opposite direction, thereby driving the bracket 2111 to move upward, thereby driving the cleaning brush 2112 to move upward to reset. When the lifting rod 2129 moves upward, the lifting rod 2129 gradually moves downward and resets under the action of the lifting spring 21210, thereby driving the lifting plate 2128 to move downward and reset, so that the lifting plate 2128 drives the connecting rod 2124 to move downward, so that the connecting rod 2124 drops again to the same plane as the push rod 2126, so as to facilitate the resistance to the push rod 2126 again.

[0060] Reference Figure 1 and Figure 3The structure of the second module is the same as that of the first module, wherein the rack 2143 in the second module is fixedly mounted on the bottom wall of the second sealing frame 224, and other structures in the second module are mounted in the second cleaning box 24 and remain symmetrical with the structure in the first module.

[0061] The working principle of the embodiment of the present application is: the exhaust gas is passed into the air inlet 11 of the box 1, so that the exhaust gas enters the air flow channel, and the exhaust gas is filtered by the first filter 221 to block larger dust particles, thereby achieving pretreatment of the exhaust gas, and the pretreated exhaust gas is passed into the next process for treatment.

[0062] After the first filter screen 221 has been used for a period of time, the rack 2143 in the second cleaning box 24 is driven by the second module to move toward the box body 1, thereby driving the second sealing frame 224 to move into the box body 1, so that the second filter screen 223 is aligned with the air flow channel. At the same time, the second sealing frame 224 pushes the first sealing frame 222 out of the box body 1 and pushes it toward the first cleaning box 23 through the connecting rod 225, so that the rack 2143 is engaged with the gear 2142, and then the gear 2142 is driven to rotate by the driving motor 2141, thereby pulling the first sealing frame 222 into the first cleaning box 23, and then the first filter screen 221 is cleaned by the first module, so as to clean up the foreign particles on the first filter screen 221.

[0063] After the second filter 223 is used for a period of time, the gear 2142 is driven to rotate by the driving motor 2141, thereby driving the rack 2143 to move toward the box body 1, thereby driving the first sealing frame 222 to move into the box body 1, so that the first filter 221 is aligned with the airflow channel. At the same time, the first sealing frame 222 pushes the second sealing frame 224 out of the box body 1 and pushes it toward the second cleaning box 24 through the connecting rod 225, so that the rack 2143 on the bottom wall of the second sealing frame 224 moves into the second cleaning box 24, thereby pulling the second sealing frame 224 into the second cleaning box 24, and then the second filter 223 is cleaned by the second module, thereby cleaning the foreign particles on the second filter 223. The exhaust gas in the airflow channel is filtered alternately by the first filter 221 and the second filter 223, so as to reduce the time wasted by stopping the machine due to the need to clean the first filter 221 or the second filter 223 separately, thereby improving the efficiency of exhaust gas pretreatment.

[0064] The present application also discloses a method for treating waste gas. Figure 8 and Fig. 9 , including the following steps:

[0065] Exhaust gas pretreatment, passing the exhaust gas into the exhaust gas pretreatment equipment, using the exhaust gas pretreatment equipment to filter particulate matter in the exhaust gas, and conveying the filtered exhaust gas to the main pipeline 3, and arranging a main fan 4 on the main pipeline 3, and conveying the exhaust gas from the main pipeline 3 to the regenerative incinerator 5 through the main fan 4;

[0066] The furnace body is preheated. Three regenerative chambers 51 are provided on the regenerative incinerator 5. A ceramic regenerative body (not shown in the figure) is provided in each regenerative chamber 51. The upper ends of the three regenerative chambers 51 are interconnected to form an oxidation chamber 52. The regenerative incinerator 5 is provided with an electric heater 53 located above each regenerative chamber 51. The electric heater 53 is used to control the temperature in the oxidation chamber 52 and the regenerative chamber 51 so that the temperature in the oxidation chamber 52 reaches the working temperature. The working temperature range in this embodiment is 820 degrees Celsius to 850 degrees Celsius. The specific regenerative incinerator 5, electric heater 53 and ceramic regenerative body are all existing technologies in the field and will not be repeated here.

[0067] A first air pipe 514, a second air pipe 515 and a third air pipe 516 are arranged below each heat storage chamber 51. The three heat storage chambers 51 are named heat storage chamber No. 1 511, heat storage chamber No. 2 512 and heat storage chamber No. 3 513 in sequence. The first air pipe 514 of heat storage chamber No. 1 511, the first air pipe 514 of heat storage chamber No. 2 512 and the first air pipe 514 of heat storage chamber No. 3 513 are all connected to the main pipeline 3, and each first air pipe 514 is provided with a control valve; the second air pipe 515 of heat storage chamber No. 1 511, the second air pipe 515 of heat storage chamber No. 2 512 and the third air pipe 516 of heat storage chamber No. 3 513 are connected to the main pipeline 3. 16 are all connected to the auxiliary pipeline 6, and each second air pipe 515 is also provided with a control valve, and the auxiliary pipeline 6 is connected to the portion of the main pipeline 3 located between the pretreatment equipment and the main fan 4; the third air pipe 516 of the No. 1 heat storage chamber 511, the third air pipe 516 of the No. 2 heat storage chamber 512 and the third air pipe 516 of the No. 3 heat storage chamber 513 are all connected to the exhaust pipe 7, and each third air pipe 516 is also provided with a control valve. The exhaust pipe 7 is used to discharge the treated exhaust gas into the atmosphere, and the control valve is used to control the on and off of the pipeline connected thereto. The control valve is a prior art in the field and will not be described in detail here.

[0068] Waste gas treatment, the waste gas is treated for three cycles, the filtered waste gas is sent from the main pipeline 3 to the No. 1 heat storage chamber 511 and the No. 2 heat storage chamber 512 for preheating, the preheated waste gas enters the oxidation chamber 52 for oxidation treatment, and at the same time, the No. 3 heat storage chamber 513 is purged to clean the ceramic heat storage body. The specific purging work is the existing technology in the field and will not be elaborated here. The waste gas treated in the oxidation chamber 52 re-enters the main pipeline 3 through the secondary pipeline 6, thereby completing the first cycle of waste gas treatment; then the main pipeline 3 transports the waste gas transported from the secondary pipeline 6 to the No. 2 heat storage chamber 512 and the No. 3 heat storage chamber. In chamber 513, the exhaust gas is preheated, and the preheated exhaust gas is oxidized in oxidation chamber 52. At the same time, heat storage chamber No. 1 511 starts purging, and the treated exhaust gas enters main pipe 3 through sub-pipe 6 again, thereby completing the second cycle of exhaust gas treatment; finally, the exhaust gas is transported by main pipe 3 to heat storage chamber No. 1 511 and heat storage chamber No. 3 513 for preheating, and then the exhaust gas enters oxidation chamber 52 for oxidation. At the same time, heat storage chamber No. 2 512 starts purging, and the exhaust gas treated in oxidation chamber 52 is discharged into exhaust pipe 7, and then enters into the atmosphere, thereby completing the third cycle of exhaust gas treatment.

[0069] Heat recovery: the oxidized high-temperature gas flows through the ceramic heat storage body in the regenerative incinerator 5 and transfers heat to the ceramic heat storage body, so that the ceramic heat storage body is heated up, so as to preheat the subsequent exhaust gas;

[0070] Waste gas emission: the treated waste gas is discharged into the atmosphere through the exhaust pipe 7.

[0071] For emergency protection, the pipe connected to the air inlet of the box 1 in the exhaust gas pretreatment device is connected to the exhaust pipe 7 through an emergency pipe, so that when the exhaust gas pretreatment device or the regenerative thermal incinerator 5 fails, the exhaust gas is directly discharged into the exhaust pipe 7, thereby reducing more serious damage to the exhaust gas pretreatment device or the regenerative thermal incinerator 5. The oxidation chamber 52 is connected to the exhaust pipe 7 through an overheating pipe. When the temperature of the exhaust gas in the oxidation chamber 52 is higher than the working temperature set in the oxidation chamber 52, the exhaust gas is discharged into the exhaust pipe 7 through the overheating pipe. The detection of the temperature in the oxidation chamber 52 is a prior art in the art and will not be elaborated here.

[0072] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust gas pretreatment device, comprising a housing (1), wherein one end of the housing (1) is provided with an air inlet (11), and the other end is provided with an air outlet (12), wherein the air inlet (11) and the air outlet (12) are connected to form an air flow channel, characterized in that: The housing (1) is provided with a filter device (2), the filter device (2) comprising a cleaning mechanism (21) and a filter mechanism (22), the filter mechanism (22) comprising a first filter screen (221) and a second filter screen (223) for filtering exhaust gas, the first filter screen (221) and the second filter screen (223) being installed on the housing (1) along the same straight line, the first filter screen (221) and the second filter screen (223) being connected, the straight line on which the first filter screen (221) and the second filter screen (223) are located is perpendicular to the axis of the housing (1), and at the same time, only one of the first filter screen (221) and the second filter screen (223) is used to filter exhaust gas, the cleaning mechanism (21) is installed on the side wall of the housing (1), and the cleaning mechanism (21) is used to clean the portion of the filter mechanism (22) located outside the housing (1); The cleaning mechanism (21) comprises a first module installed on a first cleaning box (23) and a second module installed on a second cleaning box (24); the first module is connected to a first sealing frame (222), the second module is connected to a second sealing frame (224), and the structure of the second module is the same as that of the first module; the first module comprises a cleaning component (211), a control component (212), a lifting component (213) and a driving component (214); the driving component (214) comprises a driving motor (2141), a gear (2142) and a rack (2143); the rack (2143) is installed on the bottom wall of the first sealing frame (222); the gear (2142) is installed on the bottom wall of the first cleaning box (23) at one end of the box body (1), and the gear (2142) is located below the rack (2143), and the gear (2142) is used to mesh with the rack (2143), the drive motor (2141) is installed on the first cleaning box (23), and the output shaft of the drive motor (2141) is coaxially connected to the gear (2142), the lifting component (213) and the cleaning component (211) are both installed in the first cleaning box (23), and the cleaning component (211) is connected to the lifting component (213), the control component (212) is installed in the first cleaning box (23), and the control component (212) connects the cleaning component (211) to the first sealing frame (222); The control assembly (212) comprises a pressure plate (2121), a connecting rod (2124), a push rod (2126) and a first lifting member. The pressure plate (2121) is slidably installed in the first cleaning box (23) along the axial direction of the rack (2143) through a sliding rod (2122), and the pressure plate (2121) is located at one end of the first cleaning box (23) away from the box body (1). A pressure spring (2123) is installed on the sliding rod (2122). The pressure spring (2123) ) one end of which abuts against the side wall of the pressure plate (2121), and the other end of which abuts against the inner wall of the first cleaning box (23); the connecting rod (2124) is slidably mounted on the bracket (2111) along a length direction perpendicular to the bracket (2111), and one end of the connecting rod (2124) extends to the pressure plate (2121), and a first extrusion slope for abutting against the connecting rod (2124) is provided on a side of the pressure plate (2121) close to the connecting rod (2124); the connecting rod (2124) is located on the bracket A guide spring (2125) is installed at one end outside the support (2111), one end of the guide spring (2125) is connected to the side wall of the connecting rod (2124), and the other end is connected to the side wall of the support (2111), the push rod (2126) is slidably installed on the support (2111) along the length direction of the support (2111), and one end of the push rod (2126) extends to the connecting rod (2124), and the other end extends to the guide rod (2113), and the connecting rod (2124) is close to the support (2111). A first pushing inclined surface is provided at one end of the push rod (2126), and a first abutting inclined surface is provided at one end of the push rod (2126) close to the guide rod (2113). A pushing spring (2127) is also installed on the push rod (2126), and one end of the pushing spring (2127) is connected to the side wall of the push rod (2126), and the other end is connected to the inner wall of the bracket (2111). The first lifting member is installed on the bracket (2111), and the first lifting member is used to lift the connecting rod (2124); The first lifting member includes a lifting plate (2128) and a lifting rod (2129), wherein the lifting plate (2128) is slidably mounted on the bracket (2111) in a vertical direction, and the lifting plate (2128) is located below the connecting rod (2124), and the lifting plate (2128) is used to abut against the bottom wall of the connecting rod (2124), and the lifting rod (2129) is mounted on the bottom wall of the lifting plate (2128) in a vertical direction, and the lifting rod (2129) passes downward through the bracket (2111) 1), a lifting spring (21210) is installed on the lifting rod (2129), one end of the lifting spring (21210) is connected to the bottom wall of the bracket (2111), and the other end is connected to the side wall of the lifting rod (2129), a limiting plate is installed at the lower end of the inner wall of the first cleaning box (23), the limiting plate is located below the lifting rod (2129) and at the lower end of the pressure plate (2121), and the top wall of the limiting plate is used to contact the lower end of the lifting rod (2129).

2. The exhaust gas pretreatment device according to claim 1, characterized in that: The filtering mechanism (22) further comprises a first sealing frame (222) and a second sealing frame (224); the first filter net (221) is installed in the first sealing frame (222); the second filter net (223) is installed on the second sealing frame (224); the first sealing frame (222) and the second sealing frame (224) are connected via a connecting rod (225); a switching hole (13) is provided on the box body (1) for the first sealing frame (222) and the second sealing frame (224) to pass through; the switching hole (13) penetrates the box body (1) along an axial direction perpendicular to the box body (1); the first sealing frame (2 The filter device (2) further comprises a first cleaning box (23) for storing the first sealing frame (222) and a second cleaning box (24) for storing the second sealing frame (224). The first cleaning box (23) is installed at the switching hole (13) on one side of the box (1), and the second cleaning box (24) is installed at the switching hole (13) on the other side of the box (1). The first cleaning box (23) and the second cleaning box (24) are both installed with a cleaning mechanism (21) for cleaning the filter mechanism (22).

3. The exhaust gas pretreatment device according to claim 1, characterized in that: The cleaning assembly (211) comprises a bracket (2111) and a cleaning brush (2112); the bracket (2111) is installed in the first cleaning box (23), and the bracket (2111) is connected to the lifting assembly (213); the cleaning brush (2112) is slidably installed on the bracket (2111) on a side close to the first sealing frame (222) through a guide rod (2113); the axis of the guide rod (2113) is perpendicular to the axis of the rack (2143); and the guide rod (2113) One end of the guide rod (2113) extends into the bracket (2111), and a spring (2114) is also installed at one end of the guide rod (2113) located in the bracket (2111), one end of the spring (2114) is connected to the side wall of the guide rod (2113), and the other end of the spring (2114) is connected to the inner wall of the bracket (2111), the guide rod (2113) is connected to the control component (212), and the cleaning brush (2112) is used to clean the first filter screen (221) on the first sealing frame (222).

4. The exhaust gas pretreatment equipment according to claim 3, characterized in that: A dust suction port (2115) is provided on the side wall of the cleaning brush (2112) on the side close to the first filter (221); a connecting port (2116) is provided on the top wall of the cleaning brush (2112); the connecting port (2116) is connected to the dust suction port (2115); a dust suction pipe (2117) is installed on the top wall of the cleaning brush (2112) at the connecting port (2116); the dust suction pipe (2117) passes through the first cleaning box (23) and extends outwards; and a first vacuum cleaner is installed on the end of the dust suction pipe (2117) away from the cleaning brush (2112).

5. The exhaust gas pretreatment equipment according to claim 3, characterized in that: The lifting assembly (213) comprises a lifting motor (2131) and a screw rod (2132); the screw rod (2132) is installed in the first cleaning box (23) along the vertical direction; the lifting motor (2131) is installed on the top wall of the first cleaning box (23); the output shaft of the lifting motor (2131) is coaxially connected to the upper end of the screw rod (2132); and one end of the bracket (2111) is threadedly connected to the screw rod (2132).

6. A method for treating waste gas using a waste gas pretreatment device, based on a waste gas pretreatment device according to any one of claims 1 to 5, characterized in that: The steps include: Exhaust gas pretreatment, passing the exhaust gas into the exhaust gas pretreatment equipment, and using the exhaust gas pretreatment equipment to filter particulate matter in the exhaust gas; Preheating the furnace body, raising the temperature of the oxidation chamber (52) and the regenerator (51) in the regenerative thermal incinerator (5) by means of an electric heater (53); Waste gas treatment, passing the filtered waste gas into a regenerative incinerator (5) for oxidation treatment; Heat recovery allows the oxidized gas to flow through the regenerative chamber (51) in the regenerative incinerator (5), transferring heat to the ceramic regenerative body to preheat the subsequent exhaust gas.

7. A method for treating waste gas using waste gas pretreatment equipment according to claim 6, characterized in that: In the exhaust gas treatment step, the exhaust gas is subjected to three cycles of oxidation treatment.

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