Exhaust system

Abstract

The utility model discloses an exhaust system, including gas -solid separator, first filter section, backflush mechanism, material collecting spare, second filter section and fan, gas -solid separator is equipped with air inlet end and air outlet end, and first filter section is connected in air inlet end, and first filter section is equipped with first filter screen in, and the bottom of first filter section is equipped with discharge port, and discharge port is located the side of first filter screen away from gas -solid separator, and backflush mechanism is located in first filter section and is located the side of first filter screen close to gas -solid separator, and backflush mechanism is used for blowing to first filter screen, and material collecting spare is detachably connected in discharge port, and second filter section is connected in air outlet end, and second filter section is equipped with second filter screen in, and fan is connected in the one end of second filter section away from gas -solid separator. The utility model discloses an exhaust system, not only can improve the filtration effect, reduce solid state foreign matter to enter the fan, and can effectively prevent solid state foreign matter to block the filter screen, and the waste gas emission effect is better, and does not need to clean frequently to take down the filter screen.

Description

Technical Field

[0001] This utility model relates to the field of waste gas emission technology, and in particular to an exhaust system. Background Technology

[0002] Most sintering equipment, such as sintering kilns for ternary cathode materials, requires timely exhaust of waste gas through an exhaust system. To prevent solid foreign objects from being sucked into the fan impeller, which could reduce exhaust efficiency, cause abnormal furnace pressure, or even jam the impeller, related technologies install filter screens or other filtration structures in the exhaust system ducts to reduce the amount of solid foreign objects entering the fan. However, existing exhaust system filtration structures not only have poor filtration efficiency, but also allow large solid foreign objects to easily clog the filter structure, requiring frequent removal and cleaning, making them impractical. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an exhaust system that not only improves the filtration effect and reduces the entry of solid foreign objects into the fan, but also effectively prevents solid foreign objects from clogging the filter screen, resulting in better exhaust gas emission and eliminating the need for frequent filter screen removal for cleaning.

[0004] The exhaust system according to an embodiment of the present invention includes a gas-solid separator, a first filter cartridge, a backflushing mechanism, a material collector, a second filter cartridge, and a fan. The gas-solid separator has an inlet end and an outlet end. The first filter cartridge is connected to the inlet end, and the end of the first filter cartridge away from the gas-solid separator is used for air intake. A first filter screen is provided inside the first filter cartridge, and a discharge port is provided at the bottom end of the first filter cartridge. The discharge port is located on the side of the first filter screen away from the gas-solid separator. The backflushing mechanism is provided inside the first filter cartridge and located on the side of the first filter screen close to the gas-solid separator. The backflushing mechanism is used to blow air onto the first filter screen. The material collector is detachably connected to the discharge port. The second filter cartridge is connected to the outlet end, and a second filter screen is provided inside the second filter cartridge. The pore size of the second filter screen is smaller than that of the first filter screen. The fan is connected to the end of the second filter cartridge away from the gas-solid separator.

[0005] The ventilation system according to the embodiments of this utility model has at least the following beneficial effects: In this application, the exhaust gas passes through a first filter to remove large particles, a gas-solid separator for gas-solid separation, and a second filter to remove dust before being discharged by a fan. This results in better filtration and effectively reduces the amount of solid foreign matter entering the fan. Furthermore, a back-blowing mechanism is located on the side of the first filter near the gas-solid separator. This mechanism periodically blows air in the opposite direction to the exhaust gas flow towards the first filter, dislodging larger solid foreign objects that are blocking it. These objects are then collected through a discharge port into a collection bag or other collecting device. This effectively prevents solid foreign matter from clogging the filter, resulting in better exhaust gas emission from the ventilation system and eliminating the need for frequent cleaning of the first filter.

[0006] According to some embodiments of the present invention, the backflush mechanism includes an annular backflush pipe and a plurality of nozzles. The annular backflush pipe is coaxial with the first filter cartridge and is connected to an air inlet pipe. The plurality of nozzles are connected to the annular backflush pipe and arranged circumferentially along the annular backflush pipe, with the nozzles facing the first filter screen.

[0007] According to some embodiments of the present invention, the inner bottom surface of the end of the first filter cartridge away from the gas-solid separator forms a first blocking surface, and the height of the first blocking surface gradually decreases along the direction close to the gas-solid separator.

[0008] According to some embodiments of the present invention, the discharge port is provided with a valve, and the collecting component is detachably connected to the valve.

[0009] According to some embodiments of the present invention, the second filter cartridge is detachable, the second filter cartridge is provided with a slot, the second filter screen is inserted into the slot, and can be pulled out from the slot.

[0010] According to some embodiments of the present invention, the top of the second filter cartridge is provided with a handle; and / or, the second filter screen is provided with a snap-fit ​​part, the inner wall of the slot is provided with a slot, and the snap-fit ​​part is snapped into the slot.

[0011] According to some embodiments of the present invention, the second filter screen is located at the end of the second filter cartridge away from the gas-solid separator, and the inner bottom surface of the end of the second filter cartridge near the gas-solid separator forms a second blocking surface, the height of the second blocking surface gradually increasing in the direction close to the gas-solid separator.

[0012] According to some embodiments of the present invention, the exhaust system further includes a third filter cartridge, which is installed between the second filter cartridge and the fan. The third filter cartridge contains a third filter screen, and the aperture of the filter holes of the third filter screen is smaller than that of the filter holes of the second filter screen.

[0013] According to some embodiments of the present invention, a pressure sensor is provided inside the third filter cartridge, and the pressure sensor is used to detect the air pressure inside the third filter cartridge.

[0014] According to some embodiments of the present invention, a vibration frequency sensor is provided inside the third filter cartridge, and the vibration frequency sensor is used to detect the frequency of air vibration inside the third filter cartridge.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and some advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the exhaust system according to an embodiment of the present utility model; Figure 2 for Figure 1 A partial sectional view; Figure 3 This is a schematic diagram of the structure of the first filter cartridge; Figure 4 This is a schematic diagram of the second filter cartridge.

[0017] Icon labels: Gas-solid separator 100; Inlet end 101; Outlet end 102; First filter cartridge 200; First filter screen 201; Discharge port 202; First blocking surface 203; Valve 204; Backflush mechanism 300; annular backflush pipe 301; nozzle 302; air inlet pipe 303; 400 aggregate units; Second filter cartridge 500; second filter screen 501; slot 502; handle 503; snap-fit ​​part 504; second blocking surface 505; Fan 600; Third filter cartridge 700; Third filter screen 701; Pressure sensor 702. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are 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.

[0020] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] The following is for reference. Figures 1 to 4 This invention describes an exhaust system according to an embodiment of the present invention.

[0023] According to the exhaust system of the present utility model embodiment, refer to Figures 1 to 4 As shown, it includes a gas-solid separator 100, a first filter cartridge 200, a backflushing mechanism 300, a material collecting component 400, a second filter cartridge 500, and a blower 600.

[0024] The gas-solid separator 100 can be a spiral gas-solid separator or a cyclone gas-solid separator, etc. The length of the gas-solid separator 100 can be 50cm or other suitable lengths, which are determined according to actual needs. The gas-solid separator 100 is provided with an air inlet 101 and an air outlet 102. The gas-solid separator 100 can also be provided with a foreign matter discharge port to discharge the separated dust particles and other foreign matter.

[0025] The first filter cartridge 200 is connected to the air inlet end 101. The end of the first filter cartridge 200 away from the gas-solid separator 100 is used for air intake. The first filter cartridge 200 is provided with a first filter screen 201. The bottom end of the first filter cartridge 200 is provided with a discharge port 202. The discharge port 202 is located on the side of the first filter screen 201 away from the gas-solid separator 100.

[0026] The back-blowing mechanism 300 is located inside the first filter cartridge 200 and on the side of the first filter screen 201 near the gas-solid separator 100. The back-blowing mechanism 300 is connected to an air inlet pipe 303, which can be connected to an air compressor. The air compressor inputs compressed air into the back-blowing mechanism 300 through the air inlet pipe 303. The back-blowing mechanism 300 is used to blow air into the first filter screen 201.

[0027] The collecting component 400 is detachably connected to the discharge port 202. The collecting component 400 can be connected to the discharge port 202 by a clamp or snapped onto the discharge port 202. The collecting component 400 can be a dust collection bag or a collection box, etc., which will not be described in detail here.

[0028] The length of the second filter cartridge 500 can be 10cm or other suitable lengths, which are determined according to actual needs. The second filter cartridge 500 is connected to the air outlet 102. The second filter cartridge 500 is provided with a second filter screen 501. The pore size of the filter screen 501 is smaller than the pore size of the filter screen 201.

[0029] The blower 600 is connected to the end of the second filter cartridge 500 away from the gas-solid separator 100, and the blower 600 is used to extract waste gas.

[0030] In this application, after the exhaust gas enters the first filter cartridge 200, it is first filtered by the first filter screen 201 to remove larger solid foreign objects. Then it enters the gas-solid separator 100 for gas-solid separation, and then enters the second filter cartridge 500, where it is further filtered by the second filter screen 501 before entering the fan 600 and being discharged. This improved filtration effect effectively reduces the amount of solid foreign objects entering the fan 600. Furthermore, a back-blowing mechanism 300 is provided on the side of the first filter screen 201 near the gas-solid separator 100. The back-blowing mechanism 300 periodically blows air towards the first filter screen 201 in the opposite direction to the exhaust gas conveying direction, blowing off larger solid foreign objects that are blocked on the first filter screen 201. These objects are then collected through the discharge port 202 into a collection bag or other collecting device 400. This effectively prevents solid foreign objects from clogging the filter screen, resulting in better exhaust gas emission from the exhaust system and eliminating the need for frequent cleaning of the first filter screen 201.

[0031] refer to Figure 3 As shown, in some embodiments of this utility model, the backflush mechanism 300 includes an annular backflush pipe 301 and a plurality of nozzles 302. The annular backflush pipe 301 is coaxial with the first filter cartridge 200. The annular backflush pipe 301 is connected to an air inlet pipe 303. The plurality of nozzles 302 are connected to the annular backflush pipe 301 and arranged circumferentially along the annular backflush pipe 301. The nozzles 302 face the first filter screen 201.

[0032] In this embodiment, the air intake pipe 303 can be connected to an air compressor. The air compressor inputs compressed air into the annular backflush pipe 301 through the air intake pipe 303. The compressed air is then sprayed through multiple nozzles 302 toward the first filter screen 201, thereby blowing off solid foreign objects on the first filter screen 201 and preventing solid foreign objects from clogging the first filter screen 201. Moreover, the annular backflush pipe 301 is coaxial with the first filter cartridge 200, and the multiple nozzles 302 are arranged circumferentially along the annular backflush pipe 301. In this way, the blowing is more comprehensive and uniform, and the effect of cleaning solid foreign objects on the first filter screen 201 is better.

[0033] refer to Figure 3 As shown, in some embodiments of this utility model, the inner bottom surface of the end of the first filter cartridge 200 away from the gas-solid separator 100 forms a first blocking surface 203. The first blocking surface 203 can be an inclined surface or an arc surface, and the height of the first blocking surface 203 gradually decreases along the direction close to the gas-solid separator 100.

[0034] In this embodiment, the first blocking surface 203 and the first filter screen 201 are located on opposite sides of the discharge port 202, and the height of the first blocking surface 203 gradually decreases along the direction close to the gas-solid separator 100. In this way, the first blocking surface 203 can effectively block and guide solid foreign objects, making it easier for solid foreign objects in the first filter cartridge 200 to be discharged from the discharge port 202, so that the collecting component 400 can collect solid foreign objects better.

[0035] refer to Figure 3 As shown, in some embodiments of this utility model, the discharge port 202 is equipped with a valve 204, and the collecting component 400 is detachably connected to the bottom end of the valve 204. The valve 204 is provided so that during normal waste gas conveying, it is closed to prevent waste gas from being discharged arbitrarily from the discharge port 202. When the backflushing mechanism 300 blows air in the opposite direction, the valve 204 opens to facilitate the collecting component 400 in collecting solid foreign objects.

[0036] refer to Figure 1 and Figure 4 As shown, in some embodiments of this utility model, the second filter cartridge 500 is detachable, the second filter cartridge 500 is provided with a slot 502, the second filter screen 501 is inserted into the slot 502 and can be pulled out from the slot 502. For example, the second filter cartridge 500 can be connected to the gas-solid separator 100 by a snap-fit ​​connection, a clamp connection or a fastener connection.

[0037] In this embodiment, the second filter cartridge 500 is detachable, and the second filter screen 501 is inserted into the slot 502 and can be pulled out from the slot 502. Thus, when the second filter screen 501 needs to be cleaned, the second filter cartridge 500 can be removed and the second filter screen 501 can be pulled out, making cleaning more convenient.

[0038] It should be noted that since the first filter 201 has filtered out most of the solid foreign objects, the remaining dust and foreign particles are not easy to clog the filter. Therefore, the first filter 201 only needs to be cleaned once every long period of time.

[0039] refer to Figure 1 , Figure 2 and Figure 4As shown, in some embodiments of this utility model, a handle 503 is provided at the top of the second filter cartridge 500. The handle 503 makes it easier to remove the second filter cartridge 500 after disassembly.

[0040] refer to Figure 4 As shown, in some embodiments of this utility model, the top end of the second filter 501 is provided with a snap-fit ​​portion 504, and the inner wall of the slot 502 is provided with a slot, and the snap-fit ​​portion 504 is snapped into the slot. When the second filter 501 is inserted into the slot 502, the snap-fit ​​portion 504 at the top end of the second filter 501 is snapped into the slot, thus preventing the second filter 501 from being moved out of the slot 502 at will.

[0041] refer to Figure 4 As shown, in some embodiments of this utility model, the second filter screen 501 is located at the end of the second filter cartridge 500 away from the gas-solid separator 100, and the inner bottom surface of the end of the second filter cartridge 500 near the gas-solid separator 100 forms a second blocking surface 505. The second blocking surface 505 can be an inclined surface or an arc surface, and the height of the second blocking surface 505 gradually increases along the direction near the gas-solid separator 100.

[0042] In this embodiment, the second filter screen 501 is located at the end of the second filter cartridge 500 away from the gas-solid separator 100, and the height of the second blocking surface 505 gradually increases along the direction close to the gas-solid separator 100. In this way, when the second filter cartridge 500 is removed, it can effectively prevent dust and foreign particles inside the second filter cartridge 500 from falling randomly from both ends of the second filter cartridge 500, so that dust and foreign particles can be collected and processed when the second filter cartridge 500 is removed.

[0043] refer to Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the exhaust system further includes a third filter cartridge 700, which is installed between the second filter cartridge 500 and the fan 600. The third filter cartridge 700 is provided with a third filter screen 701, and the aperture of the filter holes of the third filter screen 701 is smaller than the aperture of the filter holes of the second filter screen 501.

[0044] In this embodiment, a third filter 701 is provided near the fan 600. The pore size of the third filter 701 is smaller than that of the second filter 501. This allows for further filtration of the exhaust gas, resulting in better dust removal performance.

[0045] It is understandable that the third filter cartridge 700 can be detachable. Of course, since the third filter screen 701 is difficult to clog, it can also be fixed and does not need to be disassembled. This will not be elaborated further here.

[0046] It should be noted that the mesh size of the first filter screen 201, the second filter screen 501, and the third filter screen 701 can be gradually increased. For example, the first filter screen 201 can have a mesh size of 5, the second filter screen 501 can have a mesh size of 8, and the third filter screen 701 can have a mesh size of 10. Of course, other suitable mesh sizes are also possible, which will not be elaborated here.

[0047] refer to Figure 2 As shown, in some embodiments of this utility model, a pressure sensor 702 is provided inside the third filter cartridge 700. The pressure sensor 702 is used to detect the air pressure inside the third filter cartridge 700. For example, the pressure sensor 702 can be electrically connected to a controller, and the controller is electrically connected to the fan 600. When solid foreign objects clog the first filter screen 201 or the second filter screen 501, the pressure sensor 702 will sense a decrease in the pressure applied by the exhaust gas, and then send a signal to the controller. The controller will control the fan 600 to stop running, so as to facilitate the back-blowing mechanism 300 to perform reverse blowing, or to remove the second filter cartridge 500 to clean the second filter screen 501.

[0048] It should be noted that the pressure sensor 702 is a common sensor, and its structure and working principle will not be described in detail here.

[0049] In some embodiments of this invention, a vibration frequency sensor may also be provided inside the third filter cartridge 700. The vibration frequency sensor is used to detect the frequency of air vibrations within the third filter cartridge 700. For example, the vibration frequency sensor may be electrically connected to a controller, which is electrically connected to the fan 600. During normal exhaust gas transport, the air vibration frequency received by the vibration frequency sensor is relatively low. When solid foreign objects block part of the first filter screen 201 or the second filter screen 501, the air vibration frequency received by the vibration frequency sensor will increase significantly. When solid foreign objects completely block the first filter screen 201 or the second filter screen 501, the vibration frequency sensor will no longer be vibrated, and the vibration frequency will decrease significantly. Thus, when the vibration frequency received by the vibration frequency sensor increases or decreases significantly, a signal is sent to the controller, which controls the fan 600 to stop running, so that the back-blowing mechanism 300 can perform reverse blowing, or the second filter cartridge 500 can be removed to clean the second filter screen 501.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An exhaust system, characterized in that, include: The gas-solid separator is equipped with an inlet and an outlet. A first filter cartridge is connected to the air inlet end. The end of the first filter cartridge away from the gas-solid separator is used for air intake. A first filter screen is provided inside the first filter cartridge. A discharge port is provided at the bottom end of the first filter cartridge. The discharge port is located on the side of the first filter screen away from the gas-solid separator. A back-blowing mechanism is provided inside the first filter cartridge and located on the side of the first filter screen near the gas-solid separator. The back-blowing mechanism is used to blow air onto the first filter screen. The material collection component is detachably connected to the discharge port; A second filter cartridge is connected to the air outlet end. A second filter screen is provided inside the second filter cartridge. The pore size of the filter screen is smaller than that of the filter screen of the first filter screen. A blower is connected to the end of the second filter cartridge furthest from the gas-solid separator.

2. The exhaust system according to claim 1, characterized in that, The backflush mechanism includes: An annular backflush pipe is coaxial with the first filter cartridge, and the annular backflush pipe is connected to an air inlet pipe; Multiple nozzles are connected to the annular backflush pipe and arranged circumferentially along the annular backflush pipe, with the nozzles facing the first filter screen.

3. The exhaust system according to claim 1, characterized in that, The inner bottom surface of the end of the first filter cartridge away from the gas-solid separator forms a first blocking surface, and the height of the first blocking surface gradually decreases along the direction close to the gas-solid separator.

4. The exhaust system according to claim 1, characterized in that, The discharge port is equipped with a valve, and the material collecting component is detachably connected to the valve.

5. The exhaust system according to claim 1, characterized in that, The second filter cartridge is detachable and has a slot. The second filter screen is inserted into the slot and can be pulled out from the slot.

6. The exhaust system according to claim 5, characterized in that, The second filter cartridge is provided with a handle at its top; and / or, The second filter screen is provided with a snap-fit ​​part, and the inner wall of the slot is provided with a slot, and the snap-fit ​​part is snapped into the slot.

7. The exhaust system according to claim 1, characterized in that, The second filter screen is located at the end of the second filter cartridge away from the gas-solid separator. The inner bottom surface of the end of the second filter cartridge near the gas-solid separator forms a second blocking surface, and the height of the second blocking surface gradually increases along the direction close to the gas-solid separator.

8. The exhaust system according to claim 1, characterized in that, The exhaust system also includes: A third filter cartridge is installed between the second filter cartridge and the fan. The third filter cartridge contains a third filter screen, and the pore size of the third filter screen is smaller than that of the second filter screen.

9. The exhaust system according to claim 8, characterized in that, The third filter cartridge is equipped with a pressure sensor, which is used to detect the air pressure inside the third filter cartridge.

10. The exhaust system according to claim 8, characterized in that, The third filter cartridge is equipped with a vibration frequency sensor, which is used to detect the frequency of air vibrations within the third filter cartridge.

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