Exhaust gas purification device and purification method

Abstract

The application discloses a kind of exhaust gas purification device and its purification method, the device includes support table, be equipped in the support table on air extractor, cyclone separator and cloth bag dust collector, with the air inlet of air extractor connection air inlet pipe, first communication pipe is equipped in the air outlet of air extractor, the air outlet of cyclone separator is equipped with profiled connecting piece and sampling assembly, with the second communication pipe of profiled connecting piece intercommunication, and heating assembly is equipped in the second communication pipe;First communication pipe other end is connected with the air inlet of cyclone separator;The air outlet of second communication pipe is connected with one end of cloth bag dust collector, the air outlet of cloth bag dust collector is connected with exhaust pipe, for discharging exhaust gas;The device makes gas difficult to enter cyclone separation from second communication pipe, to ensure the operation of device;Then under the premise of heating, gas also does not flow into cyclone separator reversely, to ensure the smooth progress of exhaust gas purification work.

Description

Technical Field

[0001] This invention relates to waste gas treatment devices, specifically a waste gas purification device, and relates to the technical field of waste gas purification. Background Technology

[0002] Waste gas purification mainly refers to the treatment of industrial waste gases generated in industrial sites, such as particulate matter, flue gas, odorous gases, and toxic and harmful gases. Common waste gas purification methods include factory flue gas purification, workshop dust gas purification, organic waste gas purification, odor removal, acid and alkali waste gas purification, and chemical waste gas purification.

[0003] However, existing waste gas treatment devices still have some problems. Most existing waste gas containing solid particles uses a combination of bag filters and cyclone separators for dust removal. The two are usually connected by a connecting pipe to ensure that the gas can enter from one device to the other. However, since the length of the connecting pipe is fixed, the gas will condense in the connecting pipe before entering the bag filter, resulting in a large amount of water vapor in the connecting pipe. Therefore, heating components are added to the connecting pipe to reduce gas condensation. However, the heated gas will flow back into the cyclone separator, resulting in the failure of waste gas purification.

[0004] Therefore, how to treat the waste gas is a problem that needs to be solved. Summary of the Invention

[0005] Purpose of the invention: To provide a waste gas purification device to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution: A waste gas purification device, comprising:

[0007] A support platform, an exhaust fan, a cyclone separator and a bag filter are mounted on the support platform, an air inlet pipe connected to the air inlet of the exhaust fan, a first connecting pipe located at the air outlet of the exhaust fan, a shaped connector and a sampling assembly located at the air outlet of the cyclone separator, a second connecting pipe connected to the shaped connector, and a heating assembly located on the second connecting pipe.

[0008] The other end of the first connecting pipe is connected to the air inlet of the cyclone separator;

[0009] The second connecting pipe outlet is connected to one end of the bag filter, and the outlet of the bag filter is connected to the exhaust pipe for discharging waste gas.

[0010] In a further embodiment, the irregular connector includes two guide pipes respectively connected to one end of the cyclone separator and the second connecting pipe, at least three first connecting pipes disposed on the guide pipes, a second connecting pipe connected to the first connecting pipes, a plurality of third connecting pipes disposed on the second connecting pipes, and at least three inclined guide plates disposed at the position of the guide pipe wall.

[0011] The first connecting pipe is horn-shaped, bends towards the center of the guide pipe, and the air outlet of the first connecting pipe gradually narrows.

[0012] After the three second connecting pipes form a hinge shape, their two free ends are respectively connected to the first connecting pipe.

[0013] In a further embodiment, the third connecting pipe includes a U-shaped pipe disposed on the surface of the second connecting pipe, and an installation pipe for connecting the U-shaped pipe and the second connecting pipe;

[0014] The U-shaped pipe near the second connecting pipe and the guide pipe is the gas inlet, which is connected to the gas outlet of the cyclone separator.

[0015] During forward operation, the gas flows through the second connecting pipe. When passing through the third connecting pipe, it enters from the U-shaped pipe and flows out from the mounting pipe. Since the gas flowing out of the mounting pipe is in the same direction as the gas in the second connecting pipe, it facilitates the discharge of the gas.

[0016] When operating in reverse, the gas enters through the mounting pipe and flows out through the U-shaped pipe. Since the gas flowing out of the U-shaped pipe is in the opposite direction to the gas in the second connecting pipe, it can impede the gas flow rate in the second connecting pipe, thereby achieving unidirectional gas flow and reducing the amount of gas re-entering the cyclone separator.

[0017] In a further embodiment, the sampling assembly includes a gas collecting pipe disposed at the outlet of the cyclone separator, a pipe body connected to the gas collecting pipe, a sleeve disposed in the pipe body, a clamping block disposed at the top end of the sleeve, an adjusting cylinder connected to the clamping block and disposed on the pipe body, the other end of the sleeve extending along the axial direction of the pipe body, a gas collecting bottle clamped to the pipe body, and a miniature negative pressure pump disposed on the pipe body;

[0018] A connecting cavity is provided in the tube body;

[0019] The axis of the sleeve coincides with the axis of the tube body;

[0020] The other end of the sleeve is located in the gas collecting bottle, and the micro negative pressure pump is connected to the gas collecting bottle through a negative pressure pipe, and its outlet is connected to the inlet of the cyclone separator.

[0021] In a further embodiment, the sleeve includes an inner tube and an outer tube sleeved on the inner tube;

[0022] The outer tube has a protruding end near the clamping block, and the protruding end is connected to the clamping block;

[0023] A plurality of waist-shaped through holes are provided on the surface of the outer tube at a predetermined distance from the protruding end, wherein the length direction of the waist-shaped through holes is parallel to the axis of the outer tube;

[0024] A channel for sample gas to pass through is reserved between the outer wall of the inner tube and the inner wall of the outer tube. The other end of the inner tube and the outer tube are not connected. The outer tube has multiple circular ventilation holes on its circumference at the end away from the clamping block.

[0025] In a further embodiment, the tube body is further provided with a placement cavity, a limiting ring sleeved on the outer tube, and a reset spring connected to the limiting ring;

[0026] The reset spring is connected to the top of the placement cavity;

[0027] The placement chamber is located between the connecting chamber and the miniature negative pressure pump;

[0028] When sampling, the spring's deformation direction is the same as the sleeve's movement direction. The waist-shaped hole is located in the connecting cavity. The sample gas fills the gas collecting bottle by generating negative pressure for a certain period of time through a micro negative pressure pump.

[0029] In a further embodiment, the heating assembly includes a heating tube disposed on the second connecting pipe, a mounting bracket connected to the heating tube, a rotating motor disposed on the mounting bracket, a fan disposed at the output end of the rotating motor, and a heating part disposed on the wall of the heating tube.

[0030] By using a fan and heating element, the gas temperature can be increased, reducing condensation.

[0031] In a further embodiment, the heating part includes at least two annular support rings disposed on the inner wall of the heating tube, a plurality of support wheels evenly disposed on the circumference of the support rings, the same heating wire connected in sequence to the support wheels on the two support rings, and a driving power supply connected to the heating wire.

[0032] The support wheels on the two support rings are staggered.

[0033] A purification method based on the above-mentioned waste gas purification device includes the following steps:

[0034] S1: When it is necessary to treat the exhaust gas, first turn on the switch of the exhaust fan. The exhaust fan will then allow the exhaust gas to enter the first connecting pipe through the exhaust fan, and then enter the cyclone separator through the first connecting pipe. Through the action of the cyclone separator, most of the solid particles in the exhaust gas can be removed, and then it will flow out from the exhaust port.

[0035] S2: When the gas flows out, the treated gas passes through the guide pipe and the first connecting pipe in sequence, and then enters the second connecting pipe to flow. When the gas flows out of the second connecting pipe, some of the gas continues to move in the second connecting pipe, while a small portion of the gas enters the U-shaped pipe and then enters the installation pipe from the U-shaped pipe. Finally, it is located in the second connecting pipe. Since the angle between the direction of the gas flowing out of the installation pipe and the direction of the gas flowing out of the second connecting pipe is an acute angle, it can merge with the gas in the second connecting pipe and then flow out from the guide pipe at the other end.

[0036] S3: To prevent water vapor in the gas from condensing, the heating element will be activated to heat the gas in a certain area, causing some gas to diffuse in the opposite direction to the exhaust gas flow. This diffused gas will then enter the irregularly shaped connector. When it enters the second connecting pipe, some gas will continue to move in the second connecting pipe, while a small portion will enter the mounting pipe and then the U-shaped pipe. Finally, in the second connecting pipe, the gas flow direction from the U-shaped pipe and the gas flow direction in the second connecting pipe are obtuse, thus blocking the gas in the second connecting pipe. This makes it difficult for the gas to enter the cyclone separator from the second connecting pipe, thereby ensuring the operation of the device.

[0037] S4: When sample gas collection is required, the adjusting cylinder starts working. The moving adjusting cylinder can drive the clamping block to move, and then the moving clamping block can drive the sleeve to move, so that the waist-shaped hole in the appearance is located in the connecting cavity. At this time, the micro negative pressure pump starts working, so that the waste gas can enter the connecting cavity from the gas collecting pipe, and then enter the gas channel between the outer tube and the inner tube through the waist-shaped hole, and then reach the gas collecting bottle. Then the micro negative pressure pump continues to work for a period of time, so that the sample gas is located in the gas collecting bottle. Then the gas collecting bottle is replaced. The gas collecting bottle is equipped with a hinged sealing cap, which can prevent sample gas leakage and complete the sample gas collection work.

[0038] S5: Then the exhaust gas can enter the bag filter through the second connecting pipe. When the sample gas collection result is greater than the predetermined standard value, the bag filter is opened, and otherwise it is closed. Then the gas can be discharged from the outlet of the bag filter. In order to avoid gas condensation, the power supply is used to energize the heating wire, so that it can generate heat and then rotate the motor. The rotating motor can drive the fan to move, so that the hot air can flow and heat the gas in the second connecting pipe, thereby preventing gas condensation and completing the purification of exhaust gas.

[0039] Beneficial Effects: This invention discloses a waste gas purification device. To treat waste gas, the device incorporates a heterogeneous connector at the outlet of the cyclone separator. During normal operation, some gas continues to move in the second connecting pipe, while a small portion enters the U-shaped pipe and then the mounting pipe, finally settling back into the second connecting pipe. Since the angle between the gas flowing out of the mounting pipe and the gas flowing in the second connecting pipe is acute, they can merge, and the gas then flows out through the guide pipe at the other end, where it is heated by the heating assembly. When the gas enters the second connecting pipe, some of it continues to move within the second connecting pipe, while a small portion enters the mounting pipe and then the U-shaped pipe. Finally, it reaches the second connecting pipe. Since the angle between the direction of the gas flowing out of the U-shaped pipe and the direction of the gas flowing out of the second connecting pipe is obtuse, it blocks the gas in the second connecting pipe, making it difficult for the gas to enter the cyclone separator from the second connecting pipe, thus ensuring the operation of the device. Furthermore, under heating conditions, the gas will not flow back into the cyclone separator, thus ensuring the smooth operation of the waste gas purification work. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the present invention.

[0041] Figure 2 This is a perspective view of the irregularly shaped connector of the present invention.

[0042] Figure 3 This is a left view of the irregularly shaped connector of the present invention.

[0043] Figure 4 This is a schematic diagram of the irregular-shaped connector structure of the present invention.

[0044] Figure 5 This is a schematic diagram of the sampling component structure of the present invention.

[0045] Figure 6 This is a schematic diagram of the sleeve structure of the present invention.

[0046] Figure 7 This is a schematic diagram of the heating component structure of the present invention.

[0047] The attached figures are labeled as follows: support platform 1, cyclone separator 2, first connecting pipe 3, second connecting pipe 4, exhaust pipe 5, heating assembly 6, mounting bracket 61, rotating motor 62, fan 63, support ring 64, drive power supply 65, support wheel 66, heating wire 67, heating tube 68, bag filter 7, irregular connecting piece 8, guide pipe 81, guide plate 82, first connecting pipe 83, second connecting pipe 84, third connecting pipe 85, U-shaped pipe 851, mounting pipe 852, sampling assembly 9, pipe body 91, clamping block 92, adjusting cylinder 93, sleeve 94, outer pipe 941, inner pipe 942, limit ring 95, return spring 96, gas collecting bottle 97, connecting cavity 98, micro negative pressure pump 99, gas collecting pipe 910, and vacuum pump 10. Detailed Implementation

[0048] After research and analysis by the applicant, the reason for this problem (the heated gas flows back into the cyclone separator, leading to the failure of waste gas purification) lies in the existence of some problems in some waste gas treatment devices. Currently, most waste gas containing solid particles is treated using a combination of bag filters and cyclone separators, with the two usually connected by a connecting pipe to ensure gas can enter from one device to the other. However, due to the fixed length of the connecting pipe, the gas condenses in the connecting pipe before entering the bag filter, resulting in a large amount of water vapor in the connecting pipe. Therefore, a heating component is added to the connecting pipe to reduce gas condensation. However, the heated gas flows back into the cyclone separator. To complete the waste gas treatment, this invention provides a non-standard connecting part at the outlet of the cyclone separator. During normal operation, some gas still moves in the second connecting pipe, while a small portion... The gas enters the U-shaped tube, then the mounting tube, and finally the second connecting tube. Since the angle between the gas flowing out of the mounting tube and the gas flowing in the second connecting tube is acute, the gas merges with the gas in the second connecting tube and flows out through the guide tube at the other end. When the heating element is heating, some gas continues to move in the second connecting tube, while a small portion enters the mounting tube and then the U-shaped tube, finally ending up in the second connecting tube. Here, the angle between the gas flowing out of the U-shaped tube and the gas flowing in the second connecting tube is obtuse, blocking the gas from entering the cyclone separator from the second connecting tube, thus ensuring the device's operation. Furthermore, under heating conditions, the gas will not flow back into the cyclone separator, ensuring the smooth operation of the waste gas purification process.

[0049] A waste gas purification device includes: a support platform 1, a cyclone separator 2, a first connecting pipe 3, a second connecting pipe 4, an exhaust pipe 5, a heating component 6, a mounting frame 61, a rotating motor 62, a fan 63, a support ring 64, a drive power supply 65, a support wheel 66, a heating wire 67, a heating tube 68, a bag filter 7, a special-shaped connector 8, a guide pipe 81, a guide plate 82, a first connecting pipe 83, a second connecting pipe 84, a third connecting pipe 85, a U-shaped tube 851, a mounting pipe 852, a sampling component 9, a pipe body 91, a clamping block 92, an adjusting cylinder 93, a sleeve 94, an outer tube 941, an inner tube 942, a limiting ring 95, a return spring 96, a gas collecting bottle 97, a connecting cavity 98, a miniature negative pressure pump 99, a gas collecting pipe 910, and a vacuum pump 10.

[0050] This device includes a support platform 1, an exhaust fan 10, a cyclone separator 2, and a bag filter 7 mounted on the support platform 1, an inlet pipe connected to the inlet of the exhaust fan 10, a first connecting pipe 3 located at the outlet of the exhaust fan 10, a shaped connector 8 and a sampling assembly 9 located at the outlet of the cyclone separator 2, a second connecting pipe 4 connected to the shaped connector 8, and a heating assembly 6 mounted on the second connecting pipe 4; the other end of the first connecting pipe 3 is connected to the inlet of the cyclone separator 2; the second connecting pipe 3... The outlet of the connecting pipe 4 is connected to one end of the bag filter 7, and the outlet of the bag filter 7 is connected to the exhaust pipe 5 for discharging waste gas. When it is necessary to treat the waste gas, the switch of the exhaust fan 10 is turned on first. Then the exhaust fan 10 can make the waste gas enter the first connecting pipe 3 through the exhaust fan 10, and then enter the cyclone separator 2 through the first connecting pipe 3. Through the action of the cyclone separator 2, most of the solid particles in the waste gas can be removed, and then it flows out from the outlet.

[0051] The irregularly shaped connector 8 includes two guide pipes 81 respectively connected to one end of the cyclone separator 2 and the second connecting pipe 4, at least three first connecting pipes 83 disposed on the guide pipes 81, a second connecting pipe 84 connected to the first connecting pipes 83, a plurality of third connecting pipes 85 disposed on the second connecting pipes 84, and at least three inclined guide plates 82 disposed at the position of the guide pipe 81; wherein the first connecting pipe 83 is horn-shaped, bent towards the center of the guide pipe 81, and the air outlet of the first connecting pipe 83 gradually narrows; the three third connecting pipes 84... After the second connecting pipe 84 is hinged, its two free ends are respectively connected to the first connecting pipe 83; the third connecting pipe 85 includes a UU-shaped pipe 851 disposed on the surface of the second connecting pipe 84, and an installation pipe 852 for connecting the UU-shaped pipe 851 and the second connecting pipe 84; wherein the UU-shaped pipe 851 near the second connecting pipe 84 and the guide pipe 81 is the gas inlet, which is connected to the gas outlet of the cyclone separator 2; during forward operation, the gas flows in the second connecting pipe 84, and when passing through the third connecting pipe 85, it enters from the UU-shaped pipe 851 and exits from the installation pipe 852. The gas flows out of the mounting pipe 852. Since the gas flowing out of the mounting pipe 852 is in the same direction as the gas in the second connecting pipe 84, it facilitates the discharge of the gas. When working in reverse, the gas enters from the mounting pipe 852 and flows out of the UU-shaped pipe 851. Since the gas flowing out of the UU-shaped pipe 851 is in the opposite direction to the gas in the second connecting pipe 84, it can impede the gas flow rate in the second connecting pipe 84, thereby achieving unidirectional gas flow and reducing the amount of gas re-entering the cyclone separator 2. When the gas flows out, the processed gas passes sequentially through the guide pipe 81 and the first connecting pipe 83. Then, it enters the second connecting pipe 84 for flow. When the gas flows from the second connecting pipe 84, some of the gas still moves in the second connecting pipe 84, while a small portion of the gas enters the UU-shaped pipe 851 and enters the mounting pipe 852 from the UU-shaped pipe 851. Finally, it is located in the second connecting pipe 84. Since the angle between the direction of the gas flowing out of the mounting pipe 852 and the direction of the gas flowing out of the second connecting pipe 84 is an acute angle, it can merge with the gas in the second connecting pipe 84 and then flow out from the guide pipe 81 at the other end.To prevent water vapor condensation in the gas, the heating element 6 is activated to heat a portion of the gas, causing some of the gas to diffuse in the opposite direction to the exhaust gas flow. This diffused gas then enters the irregularly shaped connector 8. Upon entering the second connecting pipe 84, some gas continues to move within it, while a small portion enters the mounting pipe 852 and then the U-shaped pipe 851. Finally, in the second connecting pipe 84, the angle between the gas flowing out of the U-shaped pipe 851 and the gas flowing into the second connecting pipe 84 is obtuse, thus blocking the gas from entering the cyclone separator from the second connecting pipe 4. This prevents the gas from entering the cyclone separator from the second connecting pipe 4, ensuring the operation of the device.

[0052] The sampling assembly 9 includes a gas collecting pipe 910 located at the outlet of the cyclone separator 2, a pipe body 91 connected to the gas collecting pipe 910, a sleeve 94 located in the pipe body 91, a clamping block 92 located at the top of the sleeve 94, an adjusting cylinder 93 connected to the clamping block 92 and located on the pipe body 91, a gas collecting bottle 97 that is snapped into the pipe body 91 at the other end of the sleeve 94, and a miniature negative pressure pump 99 located on the pipe body 91; a connection is provided in the pipe body 91. Cavity 98; the axis of the sleeve 94 coincides with the axis of the tube body 91; the other end of the sleeve 94 is located in the gas collecting bottle 97, and the micro negative pressure pump 99 is connected to the gas collecting bottle 97 through a negative pressure pipe, and its outlet is connected to the inlet of the cyclone separator 2; the sleeve 94 includes an inner tube 942 and an outer tube 941 sleeved on the inner tube 942; the outer tube 941 has a protruding end near the clamping block 92, and the protruding end is connected to the clamping block 92; a plurality of waists are provided on the surface of the outer tube 941 at a predetermined distance from the protruding end. The inner tube 942 has a through-hole, the length of which is parallel to the axis of the outer tube 941. A channel for sample gas passage is provided between the outer wall of the inner tube 942 and the inner wall of the outer tube 941. The other ends of the inner tube 942 and the outer tube 941 are not connected. Multiple circular vent holes are provided circumferentially on the end of the outer tube 941 away from the clamping block 92. When sample gas collection is required, the adjusting cylinder 93 starts working. The moving adjusting cylinder 93 drives the clamping block 92 to move, and the moving clamping block 92 then drives the sleeve 94 to move. This allows the oblong hole in the exterior to be located in the connecting cavity 98. At this time, the micro negative pressure pump 99 starts to work, which allows the exhaust gas to enter the connecting cavity 98 from the gas collecting pipe 910, and then enter the gas channel between the outer pipe 941 and the inner pipe 942 through the oblong hole, and then reach the gas collecting bottle 97. The micro negative pressure pump 99 continues to work for a period of time, so that the sample gas is located in the gas collecting bottle 97. Then the gas collecting bottle 97 is replaced. The gas collecting bottle 97 is equipped with a hinged sealing cap, which can prevent the sample gas from leaking and complete the sample gas collection work.

[0053] The tube body 91 is also provided with a placement cavity, a limiting ring 95 sleeved on the outer tube 941, and a return spring 96 connected to the limiting ring 95; the return spring 96 is connected to the top of the placement cavity; the placement cavity is located between the connecting cavity 98 and the micro negative pressure pump 99; in the sampling state, the deformation direction of the spring is the same as the movement direction of the sleeve 94, the waist-shaped hole is located in the connecting cavity 98, and the sample gas fills the gas collecting bottle 97 by the negative pressure generated by the micro negative pressure pump 99 for a certain period of time; the return spring 96 is provided to first avoid collision between the limiting ring 95 and the tube body 91, reducing the damage to the limiting ring 95, and secondly, when the sleeve 94 moves upward along its axis, the return spring 96 is compressed and in an energy storage state. When it is necessary to close the gas collecting device, the adjusting cylinder 93 works in reverse to cooperate with the elastic force of the return spring 96, so that the gas collecting device can be closed more quickly and the response speed is fast.

[0054] The heating assembly 6 includes a heating tube 68 disposed on the second connecting pipe 4, a mounting bracket 61 connected to the heating tube 68, a rotating motor 62 disposed on the mounting bracket 61, a fan 63 disposed at the output end of the rotating motor 62, and a heating section disposed on the wall of the heating tube 68; through the operation of the fan 63 and the heating section, the gas temperature can be increased and its condensation phenomenon can be reduced; the heating section includes at least two annular support rings 64 disposed on the inner wall of the heating tube 68, a plurality of support wheels 66 evenly disposed on the circumference of the support rings 64, the same heating wire 67 sequentially connected to the support wheels 66 on the two support rings 64, and a driving power supply 6 connected to the heating wire 67. 5; The support wheels 66 on the two support rings 64 are staggered; Then the exhaust gas can enter the bag filter 7 through the second connecting pipe 4. When the sample gas collection result is greater than the predetermined standard value, the bag filter 7 is opened, and otherwise it is closed. Then the gas can be discharged from the outlet of the bag filter 7. In order to avoid gas condensation, the driving power supply 65 is used to energize the heating wire 67, so that it can generate heat. Then the rotating motor 62 is working. The rotating motor 62 can drive the fan 63 to move, so that the hot gas can flow, thereby heating the gas in the second connecting pipe 4, thus avoiding gas condensation, and thus completing the purification of exhaust gas.

[0055] Working principle description: When exhaust gas treatment is required, first turn on the switch of the exhaust fan 10. The exhaust fan 10 then allows the exhaust gas to enter the first connecting pipe 3 from the inlet pipe, and then enters the cyclone separator 2 through the first connecting pipe 3. The cyclone separator 2 removes most of the solid particles from the exhaust gas, which then flows out from the outlet. As the gas flows out, the treated gas passes through the guide pipe 81 and the first connecting pipe 83 in sequence, and then enters the second connecting pipe 84. While the gas flows through the second connecting pipe 84, some of the gas continues to move within it. A small portion of the gas enters the U-shaped tube 851 and then flows into the mounting tube 852, finally reaching the second connecting tube 84. Since the angle between the gas flowing out of the mounting tube 852 and the gas flowing out of the second connecting tube 84 is acute, the gas from the mounting tube 852 merges with the gas in the second connecting tube 84 and flows out through the guide tube 81 at the other end. To prevent water vapor condensation in the gas, the heating component 6 is activated, heating a portion of the gas and causing some gas to diffuse in the opposite direction to the exhaust gas flow, thus entering the irregularly shaped connector 8. In the process of gas flow, when it enters the second connecting pipe 84, some of the gas continues to move within the second connecting pipe 84, while a small portion enters the mounting pipe 852 and then from the mounting pipe 852 into the U-shaped pipe 851. Finally, in the second connecting pipe 84, since the angle between the direction of gas flowing out of the U-shaped pipe 851 and the direction of gas flow in the second connecting pipe 84 is obtuse, the gas in the second connecting pipe 84 is blocked, making it difficult for the gas to enter the cyclone separator from the second connecting pipe 4, thus ensuring the operation of the device. Simultaneously, when sample gas collection is required, the adjusting cylinder 93 starts working, and the moving adjusting cylinder... 93 can drive the clamping block 92 to move, and the moving clamping block 92 can drive the sleeve 94 to move, so that the waist-shaped hole in the appearance is located in the connecting cavity 98. At this time, the micro negative pressure pump 99 starts to work, so that the waste gas can enter the connecting cavity 98 from the gas collecting pipe 910, and then enter the gas channel between the outer tube 941 and the inner tube 942 through the waist-shaped hole, and then reach the gas collecting bottle 97. Then the micro negative pressure pump 99 continues to work for a period of time, so that the sample gas is located in the gas collecting bottle 97. Then the gas collecting bottle 97 is replaced. The gas collecting bottle 97 is equipped with a hinged sealing cap, so as to prevent the sample gas from leaking and complete the sample gas collection work.The exhaust gas then enters the bag filter 7 through the second connecting pipe 4. When the sample gas collection result is greater than the predetermined standard value, the bag filter 7 is opened; otherwise, it is closed. The gas can then be discharged from the outlet of the bag filter 7. During this process, to prevent gas condensation, the power supply 65 energizes the heating wire 67, generating heat. This heat then drives the motor 62, which in turn drives the fan 63, causing the hot gas to circulate and heat the gas in the second connecting pipe 4, thus preventing condensation and completing the exhaust gas purification process.

[0056] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A waste gas purification device, characterized in that, include: The system includes a support platform, an exhaust fan, a cyclone separator, and a bag filter mounted on the support platform; an air inlet pipe connected to the air inlet of the exhaust fan; a first connecting pipe located at the air outlet of the exhaust fan; a shaped connector and a sampling assembly located at the air outlet of the cyclone separator; a second connecting pipe connected to the shaped connector; and a heating assembly mounted on the second connecting pipe; the other end of the first connecting pipe is connected to the air inlet of the cyclone separator. The outlet of the second connecting pipe is connected to one end of the bag filter, and the outlet of the bag filter is connected to the exhaust pipe for discharging exhaust gas. The irregularly shaped connector includes two guide pipes respectively connected to one end of the cyclone separator and the second connecting pipe, at least three first connecting pipes on the guide pipes, second connecting pipes connected to the first connecting pipes, multiple third connecting pipes on the second connecting pipes, and at least three inclined guide plates on the wall of the guide pipes. The first connecting pipes are horn-shaped, curved towards the center of the guide pipe, and their outlets gradually narrow. The three second connecting pipes are hinged, with their two free ends connected to the first connecting pipes. The third connecting pipe includes a... A U-shaped tube is provided on the surface of the second connecting pipe, and an installation pipe is used to connect the U-shaped tube and the second connecting pipe; wherein the U-shaped tube near the second connecting pipe and the guide pipe is the gas inlet, which is connected to the gas outlet of the cyclone separator. When working in the forward direction, the gas flows in the second connecting pipe, and when passing through the third connecting pipe, it enters from the U-shaped tube and flows out from the installation pipe. Since the gas flowing out of the installation pipe is in the same direction as the gas in the second connecting pipe, it is convenient for the gas to be discharged. When working in the reverse direction, the gas enters from the installation pipe and flows out from the U-shaped tube. Since the gas flowing out of the U-shaped tube is in the opposite direction to the gas in the second connecting pipe, it can impede the gas flow rate in the second connecting pipe, thereby realizing unidirectional gas flow and reducing the re-entry of gas into the cyclone separator.

2. The waste gas purification device according to claim 1, characterized in that: The sampling assembly includes a gas collecting pipe located at the outlet of the cyclone separator, a pipe body connected to the gas collecting pipe, a sleeve located in the pipe body, a clamping block located at the top of the sleeve, an adjusting cylinder connected to the clamping block and located on the pipe body, the other end of the sleeve extending along the axial direction of the pipe body, a gas collecting bottle clamped to the pipe body, and a miniature negative pressure pump located on the pipe body; a connecting cavity is formed in the pipe body; the axis of the sleeve coincides with the axis of the pipe body; the other end of the sleeve is located in the gas collecting bottle; the miniature negative pressure pump is connected to the gas collecting bottle through a negative pressure pipe, and its outlet is connected to the inlet of the cyclone separator.

3. The waste gas purification device according to claim 2, characterized in that: The sleeve includes an inner tube and an outer tube sleeved on the inner tube; the outer tube has a protruding end near the clamping block, and the protruding end is connected to the clamping block; a plurality of waist-shaped through holes are provided on the surface of the outer tube at a predetermined distance from the protruding end, wherein the length direction of the waist-shaped through holes is parallel to the axis of the outer tube; a channel for sample gas to pass through is reserved between the outer wall of the inner tube and the inner wall of the outer tube, the other end of the inner tube and the outer tube are not connected, and a plurality of circular vent holes are provided circumferentially at the end of the outer tube away from the clamping block.

4. The waste gas purification device according to claim 3, characterized in that: The tube body is also provided with a placement cavity, a limiting ring sleeved on the outer tube, and a return spring connected to the limiting ring; the return spring is connected to the top of the placement cavity; the placement cavity is located between the connecting cavity and the micro negative pressure pump; in the sampling state, the deformation direction of the spring is the same as the movement direction of the sleeve, the waist-shaped hole is located in the connecting cavity, and the sample gas fills the gas collecting bottle by the negative pressure generated by the micro negative pressure pump for a certain period of time.

5. A waste gas purification device according to claim 4, characterized in that: The heating assembly includes a heating tube disposed on the second connecting pipe, a mounting bracket connected to the heating tube, a rotating motor disposed on the mounting bracket, a fan disposed at the output end of the rotating motor, and a heating part disposed on the wall of the heating tube; through the operation of the fan and the heating part, the gas temperature can be increased and its condensation phenomenon can be reduced.

6. The waste gas purification device according to claim 5, characterized in that: The heating section includes at least two annular support rings disposed on the inner wall of the heating tube, a plurality of support wheels evenly disposed on the circumference of the support rings, the same heating wire connected in sequence to the support wheels on the two support rings, and a driving power supply connected to the heating wire; the support wheels on the two support rings are staggered.

7. A purification method based on the waste gas purification device according to claim 6, characterized in that, Includes the following steps: S1: When it is necessary to treat the exhaust gas, first turn on the switch of the exhaust fan. The exhaust fan will then allow the exhaust gas to enter the first connecting pipe through the exhaust fan, and then enter the cyclone separator through the first connecting pipe. Through the action of the cyclone separator, most of the solid particles in the exhaust gas can be removed, and then it will flow out from the exhaust port. S2: When the gas flows out, the treated gas passes through the guide pipe and the first connecting pipe in sequence, and then enters the second connecting pipe to flow. When the gas flows out of the second connecting pipe, some of the gas continues to move in the second connecting pipe, while a small portion of the gas enters the U-shaped pipe and then enters the installation pipe from the U-shaped pipe. Finally, it is located in the second connecting pipe. Since the angle between the direction of the gas flowing out of the installation pipe and the direction of the gas flowing out of the second connecting pipe is an acute angle, it can merge with the gas in the second connecting pipe and then flow out from the guide pipe at the other end. S3: To prevent water vapor in the gas from condensing, the heating element will be activated to heat the gas in a certain area, causing some gas to diffuse in the opposite direction to the exhaust gas flow. This diffused gas will then enter the irregularly shaped connector. When it enters the second connecting pipe, some gas will continue to move in the second connecting pipe, while a small portion will enter the mounting pipe and then the U-shaped pipe. Finally, in the second connecting pipe, the gas flow direction from the U-shaped pipe and the gas flow direction in the second connecting pipe are obtuse, thus blocking the gas in the second connecting pipe. This makes it difficult for the gas to enter the cyclone separator from the second connecting pipe, thereby ensuring the operation of the device. S4: When sample gas collection is required, the adjusting cylinder starts working. The moving adjusting cylinder can drive the clamping block to move, and then the moving clamping block can drive the sleeve to move, so that the waist-shaped hole in the outer tube is located in the connecting cavity. At this time, the micro negative pressure pump starts working, so that the waste gas can enter the connecting cavity from the gas collecting pipe, and then enter the gas channel between the outer tube and the inner tube through the waist-shaped hole, and then reach the gas collecting bottle. Then the micro negative pressure pump continues to work for a period of time, so that the sample gas is located in the gas collecting bottle. Then the gas collecting bottle is replaced. The gas collecting bottle is equipped with a hinged sealing cap, which can prevent sample gas leakage and complete the sample gas collection work. S5: Then the exhaust gas can enter the bag filter through the second connecting pipe. When the sample gas collection result is greater than the predetermined standard value, the bag filter is opened, and otherwise it is closed. Then the gas can be discharged from the outlet of the bag filter. In order to avoid gas condensation, the power supply is used to energize the heating wire, so that it can generate heat and then rotate the motor. The rotating motor can drive the fan to move, so that the hot air can flow and heat the gas in the second connecting pipe, thereby preventing gas condensation and completing the purification of exhaust gas.

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