A small and medium wind volume low concentration waste gas collaborative treatment device and process

Abstract

The application relates to the technical field of waste gas treatment, and discloses a small and medium air volume and low concentration waste gas collaborative treatment device, which comprises a supporting mechanism with a first cavity and a second cavity in the inside, and waste gas flows to the second cavity via the first cavity; a plurality of mesh plates are fixed in the first cavity and used for preliminarily filtering the waste gas in the first cavity. The small and medium air volume and low concentration waste gas collaborative treatment device and process, through the tangential connection of the sixth pipe body and the first cylinder and the plurality of mesh plates in the first cavity, make the waste gas enter first and directly shake off larger waste residue particles by using centrifugal force generated by tangential flow, then the airflow rises and passes through the mesh plates to further block relatively smaller solid particles, efficient preliminary multi-stage physical filtration of large particles in the waste gas is realized, and the blocking risk of a subsequent treatment unit is reduced.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a co-treatment device and process for small to medium volume, low concentration waste gas. Background Technology

[0002] In the production processes of industries such as spraying, plastic injection molding, rubber processing, and chemicals, a large amount of industrial waste gas is inevitably generated. This type of waste gas generally has the characteristics of medium to small air volume (500-30000 m³ / h), VOCs concentration between 100-800 mg / m³, particulate matter concentration between 50-300 mg / m³, complex composition, and large instantaneous fluctuations in gas volume.

[0003] Currently, conventional treatment technologies for this type of waste gas mostly employ a combination of "washing + adsorption" or "washing + combustion". As the core equipment for pretreatment, the wet scrubbing tower usually relies on internally fixed swirl blades to rotate the waste gas and bring it into contact with the spray liquid to remove particulate matter such as paint mist and rubber debris, as well as some water-soluble waste gas. Subsequently, the waste gas passes through the wire mesh demister at the top for gas-liquid separation before being discharged into the subsequent activated carbon adsorption or catalytic combustion stage.

[0004] However, in the actual working conditions of small and medium-sized enterprises, which involve "large fluctuations in gas volume and the presence of sticky particulate matter," existing conventional wet scrubbing treatment devices have the following problems in terms of mechanical structure and operating mechanism: The tilt angle of the swirl blades inside existing scrubbing towers is fixed (e.g., a fixed 30° tilt angle). This rigid structure cannot adapt to drastic fluctuations in the volume of exhaust gas: when the instantaneous air volume of exhaust gas surges, the fixed blades will cause great system resistance (air stagnation), resulting in uneven exhaust gas flow velocity or even local short-circuiting, and the pollutant residence time is seriously insufficient; when the air volume decreases, the air pressure is not enough to generate a high-speed swirl, resulting in a decrease in the gas-liquid contact area and a significant reduction in scrubbing efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device and process for the coordinated treatment of low-concentration waste gas with small to medium air volume, which can automatically adjust the size of the spiral duct according to the air volume.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a co-treatment device for medium and low concentration waste gas with small to medium air volume, comprising: The support mechanism has a first chamber and a second chamber inside, through which exhaust gas flows from the first chamber to the second chamber; Several mesh plates are fixed inside the first chamber for preliminary filtration of the exhaust gas inside the first chamber; The regulating mechanism is located in the first cavity. The regulating mechanism includes a column with a spiral third cavity inside, and a moving component that slides up and down in the third cavity driven by the exhaust gas wind force. The exhaust gas forms a spiral airflow through the third cavity. The separation mechanism, located in the second chamber, includes a motor and a screen cylinder driven by the motor to rotate, for centrifugal separation of liquid and sludge in the exhaust gas entering the second chamber; The slag scraping mechanism is located inside the screen cylinder. The slag scraping mechanism includes a scraper that abuts against the inner wall of the screen cylinder and a thrust assembly. The thrust assembly is connected to the moving assembly and the scraper. The moving assembly can move upward according to the wind force in the first cavity and convert the upward thrust into lateral tension through the thrust assembly to adjust the friction between the scraper and the inner wall of the screen cylinder and scrape off the solid slag.

[0007] Furthermore, it also includes: The backflushing mechanism is located in the second chamber. The backflushing mechanism includes several nozzles, which are arranged facing the outer wall of the screen cylinder to blow off the solid slag that is stuck to the inner surface of the screen cylinder. The slag guiding mechanism is located outside the support mechanism. The slag guiding mechanism includes a pipeline connecting the second cavity and the air inlet side at the lower end of the support mechanism. The slag guiding mechanism can periodically guide the solid slag scraped off by the slag scraping mechanism and the sewage backflushed by the backflushing mechanism back to the bottom of the first cavity.

[0008] Furthermore, the support mechanism includes a first cylinder, a second cylinder, a first tube, and a sixth tube. The outer wall of the lower end of the first cylinder is tangentially fixedly connected to one end of the sixth tube. The upper end of the first cylinder is fixedly connected to the lower end of the second cylinder. The side wall of the second cylinder is fixedly connected to one end of the first tube. The first cavity is located inside the first cylinder, and the second cavity is located inside the second cylinder. The sixth tube, the first cavity, the second cavity, and the interior of the first tube are sequentially connected.

[0009] Furthermore, there are no fewer than two mesh plates, and the outer walls of several mesh plates are fixedly connected to the inner wall of the first cavity, with the mesh plates located above the sixth tube.

[0010] Furthermore, the adjustment mechanism also includes an arc panel, the outer wall of the column is fixedly connected to the inner wall of the first cavity, the upper end of the moving component is connected to the separation mechanism, the middle part of the moving component is located in the third cavity, the lower end of the moving component is fixedly connected to the upper surface of the arc panel, and the bottom surface of the arc panel is provided with an arc opening. The moving assembly includes a spiral blade, an eighth plate, and two third plates. The middle part of the eighth plate is connected to the separation mechanism. The bottom surface of the eighth plate is fixedly connected to the upper end of the first third plate. The lower end of the first third plate is fixedly connected to the upper end of the spiral blade. The other end of the spiral blade passes through the third cavity and is fixedly connected to the upper end of the second third plate. The lower end of the second third plate is fixedly connected to the upper surface of the arc panel. The outer wall of the spiral blade is slidably connected to the inner wall of the third cavity, and a sealing ring is provided at the sliding point between the spiral blade and the third cavity.

[0011] Furthermore, the separation mechanism also includes a first plate, a second plate, an annular plate, and a first rod. One end of the first plate is fixedly connected to the outer wall of the upper end of the second cylinder. The side wall of the first plate is fixedly connected to the base of the motor. The output shaft of the motor is fixedly connected to one end of the first rod. The other end of the first rod extends into the second cavity. The outer wall of the first rod located in the second cavity is fixedly connected to the outer wall of the middle part of the second plate and also slidably connected to the outer wall of the middle part of the eighth plate. The bottom surface of the outer ring of the second plate is fixedly connected to the upper end of the screen cylinder. The lower end of the screen cylinder is fixedly connected to the upper surface of the annular plate. The outer wall of the annular plate is rotatably connected to the inner wall of the upper end of the first cavity. The second plate, the screen cylinder, and the annular plate separate the second cavity into an inner chamber and an outer chamber. The slag scraping mechanism is located in the inner chamber, and the backflushing mechanism is located in the outer chamber.

[0012] Furthermore, the slag scraping mechanism also includes an elastic component. One end of the elastic component is connected to the upper end of the column, and the other end of the elastic component is connected to one end of the thrust component. The other two ends of the thrust component are respectively connected to the eighth plate and the scraper. The scraping surface of the scraper abuts against the inner wall of the mesh cylinder. The elastic component includes a fourth plate, a fifth plate, several second rods, and several springs. The lower end of the fourth plate is fixedly connected to the upper end of the column. The interior of the fourth plate is sleeved and slidably connected to the outer wall of several second rods. The same end of several second rods is fixedly connected to the side wall of the fifth plate. The two ends of several springs are respectively fixedly connected to the adjacent side of the fourth plate and the fifth plate. The upper end of the fifth plate is connected to the thrust component. The thrust assembly includes a sixth plate and a seventh plate. One end of the sixth plate is fixedly connected to the side of the scraper away from the screen cylinder, and one end of the seventh plate is fixedly connected to the side of the eighth plate away from the spiral blade. The side of the sixth plate away from the scraper and the side of the seventh plate close to the screen cylinder are both provided with slopes, and the slopes of the sixth plate and the seventh plate abut against each other in a wedge shape.

[0013] Furthermore, the backwash mechanism also includes a fourth tube and a fifth tube. The outer wall of the middle part of the fourth tube is fixedly connected to the inner wall of the second cylinder. One end of the fourth tube located inside the second cavity is fixedly connected to one end of the fifth tube. The side wall of the fifth tube is fixedly connected to the same end of several nozzles. The other ends of several nozzles are all facing the mesh cylinder. Several nozzles and scrapers are not on the same horizontal line in the radial section of the screen cylinder.

[0014] Furthermore, the slag guiding mechanism includes a second pipe body, a third pipe body, and a valve. The upper end of the second pipe body is located inside the inner cavity of the second chamber, the upper end of the third pipe body is located inside the outer cavity of the second chamber, and the lower ends of both the second and third pipe bodies are located outside the first cylinder. The end of the second pipe body located outside the first cylinder is fixedly connected to the outer wall of the end of the third pipe body located outside the first cylinder. The lower end of the third pipe body is also fixedly connected to the outer wall of the sixth pipe body. The valve is located inside the third pipe body near the end of the sixth pipe body.

[0015] Furthermore, a process for a co-treatment device for medium- and low-concentration waste gas with small to medium air volume includes the following steps: Step 1: Connect and fix the external exhaust gas source pipe to the sixth pipe body, connect the first pipe body to the external clean air pipe, connect the external flushing water pipe to the fourth pipe body, and start the motor to complete the preparation work. Step 2: External exhaust gas enters the first chamber tangentially through the sixth pipe, generating tangential flow. This throws out larger waste particles from the exhaust gas, which then settle to the bottom of the first chamber due to gravity. Subsequently, the exhaust gas rises and passes through several mesh plates in sequence, further blocking relatively smaller solid particles through the mesh holes. Step 3: The pre-filtered exhaust gas enters the spiral-shaped third chamber of the column and spirals upward, where it comes into countercurrent contact with the flushing water that enters the second chamber and flows downward to wash it. Then, the spiral airflow hits the inner wall of the screen cylinder, and the screen cylinder is driven by the motor to rotate at high speed to generate centrifugal force to intercept the solid slag. The purified gas passes through the mesh of the screen cylinder and enters the outer chamber before being discharged through the first pipe. Step 4: When the exhaust gas moves upward, it generates a thrust on the arc panel. The greater the wind force, the higher the arc panel rises. This pushes the scraper blades towards the screen cylinder via the ramp, achieving adaptive slag scraping where the stronger the wind force, the tighter the scraping. At the same time, water is sprayed from the outside of the screen cylinder through the nozzles for backwashing, achieving double cleaning inside and out. Step 5: The mud scraped off and washed by the scraper falls into the second pipe of the sludge guiding mechanism. The valve is opened at regular intervals, and the negative pressure and airflow generated by the high-speed entry of the exhaust gas inside the sixth pipe blow the mud back to the bottom of the first chamber for unified collection.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This type of co-treatment device and process for small and medium volume low-concentration waste gas, by setting a tangential connection between the sixth pipe and the first cylinder and several mesh plates in the first cavity, allows the waste gas to directly throw out larger waste particles by the centrifugal force generated by the tangential flow after entering. Then, the airflow rises and passes through the mesh plates to further block relatively smaller solid particles, thus achieving efficient preliminary multi-stage physical filtration of large particles in the waste gas and reducing the risk of blockage in subsequent treatment units.

[0017] This co-treatment device and process for small to medium volume and low concentration exhaust gas uses a spiral-shaped third chamber and a separation mechanism driven by a motor to rotate at high speed. This allows the exhaust gas to move in a spiral shape within the column and come into full contact with the flushing water flowing down from above. At the same time, the high-speed rotation of the screen cylinder generates a strong centrifugal force on the inner wall of the screen cylinder to block and remove the remaining tiny impurities and droplets in the exhaust gas, thus improving the efficiency of gas-liquid separation and impurity removal.

[0018] This type of co-treatment device and process for small to medium volume and low concentration exhaust gas, through the mechanical linkage of the adjustment mechanism, the scraping mechanism, and the backflushing mechanism, utilizes the upward thrust of the airflow to push the arc panel and the moving component upward. Through the inclined wedge-shaped abutment of the thrust component, the upward thrust is converted into lateral scraping tension, realizing the automatic adjustment of the friction force of the scraper blades on the screen cylinder according to the exhaust gas wind force. At the same time, it cooperates with the external nozzles that are not on the same horizontal line for high-pressure backflushing, realizing dual adaptive cleaning of the inner and outer sides of the filter screen, and solving the technical problem of filter screen clogging by sticky solids.

[0019] This type of co-treatment device and process for small and medium volume low-concentration waste gas, by setting up a sludge guiding mechanism connecting the second chamber and the outside of the first cylinder, can accurately collect the sludge scraped off by the scraper and generated by backwashing into the pipe. When the valve is opened, the pneumatic blowing force of the high-speed exhaust gas entering through the inlet guides the sludge back to the bottom of the first chamber, realizing automatic return and centralized collection of waste liquid and waste residue, eliminating the tedious manual cleaning during shutdown, and reducing the maintenance cost of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall appearance of the present invention; Figure 2 This is a schematic diagram of the overall appearance of the invention from another perspective; Figure 3 This is a detailed connection diagram of the various components inside the support mechanism of the present invention; Figure 4 For the present invention Figure 3 Front view of each component; Figure 5 This is a cross-sectional schematic diagram of the components of the support mechanism of the present invention; Figure 6This is a detailed connection diagram of the separation mechanism, slag guiding mechanism, and backflushing mechanism of the present invention; Figure 7 This is a cross-sectional schematic diagram of the separation mechanism, recoil mechanism, and adjustment mechanism of the present invention; Figure 8 This is a detailed connection diagram of the separation mechanism and the column of the present invention; Figure 9 This is a schematic diagram showing the positions of components such as the backflushing mechanism, the moving component, and the slag scraping mechanism of the present invention. Figure 10 This is a detailed connection diagram of the moving component, the arc panel, and the seventh plate of the present invention; Figure 11 This is a detailed connection diagram of the various components of the slag scraping mechanism of the present invention.

[0021] In the picture: 1. Supporting mechanism; 11. First cylinder; 111. First cavity; 12. Second cylinder; 121. Second cavity; 13. First tube; 14. Sixth tube; 2. Separation mechanism; 21. Motor; 22. First plate; 23. Second plate; 24. Mesh cylinder; 25. Ring plate; 26. First rod; 3. Slag guiding mechanism; 31. Second pipe body; 32. Third pipe body; 33. Valve; 4. Backflush mechanism; 41. Fourth tube body; 42. Fifth tube body; 43. Nozzle; 5. Mesh panel; 6. Adjustment mechanism; 61. Column; 611. Third cavity; 62. Moving component; 621. Third plate; 622. Spiral blade; 623. Eighth plate; 63. Arc panel; 631. Arc opening; 7. Slag scraping mechanism; 71. Scraper blade; 72. Elastic component; 721. Fourth plate; 722. Fifth plate; 723. Second rod; 724. Spring; 73. Thrust component; 731. Sixth plate; 732. Seventh plate; 733. Ramp. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Please see Figures 1-11 A co-treatment device for medium- and low-concentration waste gas with small to medium air volume, comprising: The support mechanism 1 has a first cavity 111 and a second cavity 121 inside, and the exhaust gas flows from the first cavity 111 to the second cavity 121. Several mesh plates 5 are fixed inside the first cavity 111 for preliminary filtration of the exhaust gas inside the first cavity 111; The regulating mechanism 6 is located inside the first cavity 111. The regulating mechanism 6 includes a column 61 with a spiral third cavity 611 inside, and a moving component 62 that slides up and down inside the third cavity 611 driven by the exhaust gas wind force. The exhaust gas forms a spiral airflow through the third cavity 611. The separation mechanism 2 is located inside the second chamber 121. The separation mechanism 2 includes a motor 21 and a mesh cylinder 24 driven by the motor 21 to rotate, which is used to centrifugally separate the liquid and sludge in the waste gas entering the second chamber 121. The slag scraping mechanism 7 is located inside the screen cylinder 24. The slag scraping mechanism 7 includes a scraper 71 that abuts against the inner wall of the screen cylinder 24 and a thrust assembly 73. The thrust assembly 73 is connected to the moving assembly 62 and the scraper 71 respectively. The moving assembly 62 can move upward according to the wind force in the first cavity 111, and convert the upward thrust into lateral tension through the thrust assembly 73 to adjust the friction between the scraper 71 and the inner wall of the screen cylinder 24 and scrape off the solid slag.

[0024] Also includes: The backflushing mechanism 4 is located inside the second cavity 121. The backflushing mechanism 4 includes a plurality of nozzles 43, which are arranged toward the outer wall of the mesh cylinder 24 to blow away the solid slag that is stuck to the inner surface of the mesh cylinder 24. The slag guiding mechanism 3 is located outside the support mechanism 1. The slag guiding mechanism 3 includes a pipeline connecting the second cavity 121 and the lower air inlet side of the support mechanism 1. The slag guiding mechanism 3 can periodically guide the solid slag scraped off by the slag scraping mechanism 7 and the sewage backflushed by the backflushing mechanism 4 back to the bottom of the first cavity 111.

[0025] Furthermore, in order to provide support for the several mesh plates 5, adjustment mechanism 6, separation mechanism 2, slag scraping mechanism 7, backflushing mechanism 4 and slag guiding mechanism 3, and also to ensure the movement channel of the exhaust gas, as a preferred embodiment of the present invention, the support mechanism 1 includes a first cylinder 11, a second cylinder 12, a first tube 13 and a sixth tube 14. The outer wall of the lower end of the first cylinder 11 is tangentially fixedly connected to one end of the sixth tube 14. The upper end of the first cylinder 11 is fixedly connected to the lower end of the second cylinder 12. The side wall of the second cylinder 12 is fixedly connected to one end of the first tube 13. The first cavity 111 is located inside the first cylinder 11, the second cavity 121 is located inside the second cylinder 12, and the sixth tube 14, the first cavity 111, the second cavity 121 and the first tube 13 are sequentially connected. Specifically, by setting up the support mechanism 1, a stable outer shell frame can be provided for the entire exhaust gas treatment device. At the same time, by utilizing the first cavity 111 and the second cavity 121 divided inside, a regular flow channel is provided for the exhaust gas to be deeply purified from the bottom layer to the top layer.

[0026] Furthermore, in order to provide better initial large particle interception, as a preferred embodiment of the present invention, the number of mesh plates 5 is not less than two, and the outer walls of several mesh plates 5 are all fixedly connected to the inner wall of the first cavity 111, and the mesh plates 5 are located above the sixth tube 14. Specifically, by setting multiple mesh plates 5, after the exhaust gas enters the first chamber 111 and passes through tangential centrifugal slag removal, the dense mesh on the mesh plates 5 can perform multi-stage physical interception of relatively small solid particles that continue to rise with the airflow, playing a very crucial primary filtration role and reducing the anti-clogging pressure on the upper components.

[0027] Furthermore, in order to form a spiral duct for the exhaust gas after preliminary filtration by the mesh plate 5, and in order to adjust the size of the spiral duct according to the wind force in the first cavity 111, as a preferred embodiment of the present invention, the adjustment mechanism 6 further includes an arc panel 63, the outer wall of the column 61 is fixedly connected to the inner wall of the first cavity 111, the upper end of the moving component 62 is connected to the separation mechanism 2, the middle part of the moving component 62 is located in the third cavity 611, the lower end of the moving component 62 is fixedly connected to the upper surface of the arc panel 63, and the bottom surface of the arc panel 63 is provided with an arc opening 631; Specifically, by setting the adjustment mechanism 6, the spiral third cavity 611 inside the column 61 is used to force the exhaust gas to spiral upward. This not only prolongs the gas-liquid contact time, but also allows the moving component 62 and the bottom arc panel 63 to sense the wind force coming up from the bottom, thus achieving adaptive adjustment of the size of the spiral airflow channel and providing a power source for subsequent mechanical linkage.

[0028] Furthermore, in order to cooperate with the arc panel 63 to automatically adjust the amount of gas that can pass through the third cavity 611, as a preferred embodiment of the present invention, the moving component 62 includes a spiral blade 622, an eighth plate 623 and two third plates 621. The middle part of the eighth plate 623 is connected to the separation mechanism 2. The bottom surface of the eighth plate 623 is fixedly connected to the upper end of the first third plate 621. The lower end of the first third plate 621 is fixedly connected to the upper end of the spiral blade 622. The other end of the spiral blade 622 passes through the third cavity 611 and is fixedly connected to the upper end of the second third plate 621. The lower end of the second third plate 621 is fixedly connected to the upper surface of the arc panel 63. The outer wall of the spiral blade 622 is slidably connected to the inner wall of the third cavity 611, and a sealing ring is provided at the sliding point between the spiral blade 622 and the third cavity 611. Specifically, by setting the moving component 62, the spiral blade 622 can slide smoothly up and down in the third cavity 611. It is like a wind pressure sensor. When the wind force increases, it can push the eighth plate 623 above upward together, and accurately transmit the pneumatic thrust at the bottom to the separation and sweeping system used for scraping slag above.

[0029] Furthermore, in order to achieve centrifugal separation of liquid and sludge in the exhaust gas entering the second cavity 121, as a preferred embodiment of the present invention, the separation mechanism 2 further includes a first plate 22, a second plate 23, an annular plate 25, and a first rod 26. One end of the first plate 22 is fixedly connected to the outer wall of the upper end of the second cylinder 12, the side wall of the first plate 22 is fixedly connected to the base of the motor 21, the output shaft of the motor 21 is fixedly connected to one end of the first rod 26, and the other end of the first rod 26 extends into the second cavity 121. The outer wall of the second cavity 121 is fixedly connected to the outer wall of the middle part of the second plate 23 and is also slidably connected to the outer wall of the middle part of the eighth plate 623. The bottom surface of the outer ring of the second plate 23 is fixedly connected to the upper end of the mesh cylinder 24. The lower end of the mesh cylinder 24 is fixedly connected to the upper surface of the ring plate 25. The outer wall of the ring plate 25 is rotatably connected to the inner wall of the upper end of the first cavity 111. The second plate 23, the mesh cylinder 24 and the ring plate 25 separate the second cavity 121 into an inner cavity and an outer cavity. The slag scraping mechanism 7 is located in the inner cavity and the backflushing mechanism 4 is located in the outer cavity. Specifically, by setting up the separation mechanism 2, the motor 21 drives the screen cylinder 24 to rotate at high speed in the second cavity 121, so that the waste gas that has just been washed and carries water mist and tiny impurities is subjected to strong centrifugal force when passing through the mesh. The water mist and liquid residue are blocked or thrown onto the inner wall of the screen cylinder 24, thereby achieving gas-liquid separation.

[0030] Furthermore, in order to scrape off the solid slag that is stuck to the inside of the scraping mechanism 7, and also to adjust the friction between the scraping mechanism 7 and the separation mechanism 2 by adjusting the adjusting mechanism 6 according to the wind force in the first cavity 111, as a preferred embodiment of the present invention, the scraping mechanism 7 further includes an elastic component 72. One end of the elastic component 72 is connected to the upper end of the column 61, and the other end of the elastic component 72 is connected to one end of the thrust component 73. The other two ends of the thrust component 73 are respectively connected to the eighth plate 623 and the scraper 71. The scraping surface of the scraper 71 abuts against the inner wall of the mesh cylinder 24. Specifically, by setting up a slag scraping mechanism 7, the scraper 71 is tightly attached to the inner side of the screen cylinder 24, which can forcefully scrape off the sticky solid slag intercepted by centrifugation. In addition, it can adjust the friction force of the scraper 71 on the screen cylinder 24 in real time by taking advantage of the wind force changes from the bottom. The stronger the wind, the harder it scrapes, preventing adhesion and blockage.

[0031] Furthermore, because the greater the air volume, the more impurities are carried in the exhaust gas, the greater the probability and frequency of clogging the mesh cylinder 24. Therefore, in order to ensure that the ability to clear blockages is better when the air volume is greater, and to reduce the squeezing of the scraper 71 and the inner wall of the mesh cylinder 24 when the exhaust gas decreases, as a preferred embodiment of the present invention, the elastic component 72 includes a fourth plate 721, a fifth plate 722, a plurality of second rods 723 and a plurality of springs 724. The lower end of the fourth plate 721 is fixedly connected to the upper end of the column 61. The interior of the fourth plate 721 is sleeved and slidably connected to the outer wall of the plurality of second rods 723. The same end of the plurality of second rods 723 is fixedly connected to the side wall of the fifth plate 722. The two ends of the plurality of springs 724 are respectively fixedly connected to the adjacent side of the fourth plate 721 and the fifth plate 722. The upper end of the fifth plate 722 is connected to the thrust component 73. Specifically, by setting up the elastic component 72 and utilizing the flexibility of the internal spring 724, it not only provides a protective buffer when the scraper 71 presses tightly against the screen cylinder 24 outward, preventing the screen cylinder 24 from being broken, but also automatically pulls the scraper 71 back to its original position by the rebound force when the wind weakens, thus extending the service life of the filter consumables.

[0032] Furthermore, in order to provide support and movement power for the scraper 71, as a preferred embodiment of the present invention, the thrust assembly 73 includes a sixth plate 731 and a seventh plate 732. One end of the sixth plate 731 is fixedly connected to the side of the scraper 71 away from the mesh cylinder 24, and one end of the seventh plate 732 is fixedly connected to the side of the eighth plate 623 away from the spiral blade 622. Both the side of the sixth plate 731 away from the scraper 71 and the side of the seventh plate 732 near the mesh cylinder 24 are provided with slopes 733, and the slopes 733 of the sixth plate 731 and the seventh plate 732 abut against each other in a wedge shape. Specifically, by setting up the thrust assembly 73, the wedge-shaped abutting structure of the ramp 733 on the sixth plate 731 and the seventh plate 732 is used to convert the vertical thrust from the eighth plate 623 below into a horizontal lateral tension that pushes the scraper 71 outward, thus completing the core force direction conversion.

[0033] Furthermore, in order to blow off the solid residue adhering to and blocking the inner surface of the separation mechanism 2 by backflushing the outside of the separation mechanism 2, as a preferred embodiment of the present invention, the backflushing mechanism 4 further includes a fourth tube 41 and a fifth tube 42. The outer wall of the middle part of the fourth tube 41 is fixedly connected to the inner wall of the second cylinder 12. One end of the fourth tube 41 located inside the second cavity 121 is fixedly connected to one end of the fifth tube 42. The side wall of the fifth tube 42 is fixedly connected to the same end of a plurality of nozzles 43. The other ends of the plurality of nozzles 43 are all facing the mesh cylinder 24. Specifically, by setting up a backwash mechanism 4, several nozzles 43 spray high-pressure water jets onto the outer wall of the mesh cylinder 24, which works in conjunction with the internal scraper 71 to flush back the solid debris stuck in the mesh holes that the scraper 71 cannot reach from the outside to the inside, thus achieving double self-cleaning of the mesh cylinder 24 inside and out.

[0034] Furthermore, in order to enable the scraper 71 and the nozzle 43 to clean synchronously from both the inside and outside of the mesh cylinder 24 and to minimize interference between them, as a preferred embodiment of the present invention, several nozzles 43 and scraper 71 are not on the same horizontal line in the radial section of the mesh cylinder 24. Specifically, by setting the nozzle 43 and the scraper 71 on different horizontal lines on the radial section of the mesh cylinder 24, it is ensured that when the inside is scraping hard, the water flow from the outside will not be blocked and splashed back because it is facing the scraper 71. The two operate independently without interfering with each other, thereby improving cleaning efficiency.

[0035] Furthermore, in order to periodically guide the solid slag scraped off by the scraping mechanism 7 and the sewage backflushed by the backflushing mechanism 4 back into the support mechanism 1, as a preferred embodiment of the present invention, the slag guiding mechanism 3 includes a second pipe body 31, a third pipe body 32 and a valve 33. The upper end of the second pipe body 31 is located in the inner cavity of the second cavity 121, the upper end of the third pipe body 32 is located in the outer cavity of the second cavity 121, the lower ends of the second pipe body 31 and the lower ends of the third pipe body 32 are both located outside the first cylinder 11, the end of the second pipe body 31 located outside the first cylinder 11 is fixedly connected to the outer wall of the end of the third pipe body 32 located outside the first cylinder 11, the lower end of the third pipe body 32 is also fixedly connected to the outer wall of the sixth pipe body 14, and the valve 33 is located inside the third pipe body 32 near the end of the sixth pipe body 14. Specifically, by setting up the slag guiding mechanism 3, a dedicated closed sewage discharge channel is provided for the sludge scraped and washed off from above; as long as the valve 33 at the bottom is opened at regular intervals, the negative pressure suction generated by the high-speed airflow at the air inlet of the sixth pipe 14 can suck all the sludge away and blow it back to the bottom of the first chamber 111, making the usual slag cleaning work more concentrated.

[0036] Working principle: Before use, first connect and fix the external exhaust gas source pipe and the sixth pipe 14, then connect the first pipe 13 and the external exhaust pipe, then connect the flushing water pipe of the fourth pipe 41, and finally adjust the motor 21 to complete the preparation work.

[0037] When the equipment is running, the rinsing water first enters the fifth pipe 42 from the fourth pipe 41, and then is sprayed onto the outer wall of the mesh cylinder 24 through several nozzles 43. This part of the water passes through the mesh of the mesh cylinder 24 and enters the inner chamber of the second cavity 121, and then flows down to the first cavity 111 by gravity along the spiral third cavity 611 inside the column 61.

[0038] At the same time, the exhaust gas enters the first cavity 111 inside the first cylinder 11 from the sixth pipe 14. Since the sixth pipe 14 and the first cylinder 11 are tangentially connected, the exhaust gas will swirl along the cylinder wall as soon as it enters, forming a tangential airflow. In this way, the heavier large pieces of waste residue in the exhaust gas are thrown out and fall naturally to the bottom of the first cavity 111 by gravity. Then, the exhaust gas continues to rise and passes through several mesh plates 5 in sequence. The mesh holes on the mesh plates 5 will intercept some of the relatively smaller solid particles.

[0039] After initial filtration, the exhaust gas continues to rise and enters the third chamber 611 inside the column 61. Because the third chamber 611 is spiral-shaped, the exhaust gas can only rise spirally in the third chamber 611, which just happens to come into contact with the flushing water flowing down from above. The water and gas come into full contact, further washing away the remaining small particles. These dirt will also flow back to the bottom of the first chamber 111 with the water.

[0040] The exhaust gas coming up along the spiral duct will spiral into the inner wall of the mesh cylinder 24 in the second chamber 121. At this time, the output shaft of the motor 21 is rotating at high speed along with the second plate 23, the mesh cylinder 24 and the ring plate 25 through the first rod 26. When the exhaust gas hits the high-speed rotating mesh cylinder 24, the solid residue and liquid droplets inside will generate a strong centrifugal force, thus being blocked or thrown away. The cleaned gas will pass through the mesh of the mesh cylinder 24 to the outer chamber of the second chamber 121, and finally be discharged through the first pipe 13.

[0041] Furthermore, because the airflow blows upwards from the bottom of the mesh plate 5, the exhaust gas exerts an upward force on the arc opening 631 at the bottom of the arc panel 63. The greater the incoming airflow, the higher the arc panel 63 is pushed, which in turn lifts the spiral blade 622 of the moving component 62 and the eighth plate 623 at the top. As the eighth plate 623 rises, its connected seventh plate 732 also moves upwards. The ramp 733 on the seventh plate 732 and the ramp 733 on the sixth plate 731 are wedge-shaped and interlock. The compression pushes the sixth plate 731, along with the front scraper 71, towards the mesh cylinder 24. This ensures that the stronger the wind, the tighter and cleaner the scraper 71 scrapes against the mesh cylinder 24. At the same time, the elastic component 72 is connected to the back of the scraper 71. The fourth plate 721, the fifth plate 722, and the spring 724 not only play a flexible buffering role, but also allow the scraper 71 to loosen and retract when the wind decreases and the curved panel 63 falls back, preventing it from constantly sticking to the mesh cylinder 24 and causing wear.

[0042] Not only is the scraper 71 scraping inside, but there is also a high-speed water flow from the nozzle 43 outside. Moreover, because the nozzle 43 and the scraper 71 are staggered and not on the same horizontal line, high-pressure backwashing can be performed on the area scraped by the scraper 71 from the outside of the mesh cylinder 24, achieving double cleaning inside and out.

[0043] Finally, the sludge scraped off by the scraper 71 falls onto the upper surface of the column 61 by gravity. Because the scraper 71 is directly opposite the upper opening of the second pipe 31 in the sludge guiding mechanism 3, the sludge will automatically fall into the second pipe 31. When it is time to discharge sludge, the valve 33 below is opened. With the high-speed wind force of the exhaust gas rushing in from the sixth pipe 14 at the bottom, the sludge in the pipe is blown directly back into the first cylinder 11. After the sludge falls to the bottom of the first cavity 111, it can be cleaned out in a unified manner later.

[0044] Finally, it should be noted that a conventional auxiliary spraying mechanism, such as a ring pipe or symmetrical branch pipe, can be installed above the column 61 and inside the mesh cylinder 24 to provide additional downward washing liquid to the third chamber 611. By additionally installing conventional downward spraying pipes, a more stable and wider-coverage washing water curtain can be provided in the upper layer. Combined with the water flow that originally seeped in from the external backwash mechanism 4, the two pipes work together to not only increase the liquid-gas contact area but also ensure the wettability of the spiral blade 622 surface, preventing the high-concentration exhaust gas from drying and clogging in the early stage of spiral ascent.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. A co-treatment device for medium- and small-volume, low-concentration waste gas, characterized in that, include: The support mechanism (1) has a first cavity (111) and a second cavity (121) inside, and the exhaust gas flows from the first cavity (111) to the second cavity (121). Several mesh plates (5) are fixed inside the first cavity (111) for preliminary filtration of the exhaust gas inside the first cavity (111); The regulating mechanism (6) is located in the first cavity (111). The regulating mechanism (6) includes a column (61) with a spiral third cavity (611) inside, and a moving component (62) that slides up and down in the third cavity (611) driven by the exhaust gas wind force. The exhaust gas forms a spiral airflow through the third cavity (611). The separation mechanism (2) is located in the second cavity (121). The separation mechanism (2) includes a motor (21) and a mesh cylinder (24) driven to rotate by the motor (21) for centrifugal separation of liquid sludge in the waste gas entering the second cavity (121). The slag scraping mechanism (7) is located inside the mesh cylinder (24). The slag scraping mechanism (7) includes a scraper (71) that abuts against the inner wall of the mesh cylinder (24) and a thrust assembly (73). The thrust assembly (73) is connected to the moving assembly (62) and the scraper (71) respectively. The moving assembly (62) can move upward according to the wind force in the first cavity (111) and convert the upward thrust into lateral tension through the thrust assembly (73) to adjust the friction between the scraper (71) and the inner wall of the mesh cylinder (24) and scrape off the solid slag.

2. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 1, characterized in that, Also includes: A backflushing mechanism (4) is located in the second cavity (121). The backflushing mechanism (4) includes a plurality of nozzles (43) which are arranged toward the outer wall of the mesh cylinder (24) to blow away the solid slag that is stuck to the inner surface of the mesh cylinder (24). The slag guiding mechanism (3) is located outside the support mechanism (1). The slag guiding mechanism (3) includes a pipeline connecting the second cavity (121) and the lower air inlet side of the support mechanism (1). The slag guiding mechanism (3) can guide the solid slag scraped off by the slag scraping mechanism (7) and the sewage back-flushed by the backflushing mechanism (4) back to the bottom of the first cavity (111) at regular intervals.

3. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 2, characterized in that, The support mechanism (1) includes a first cylinder (11), a second cylinder (12), a first tube (13), and a sixth tube (14). The outer wall of the lower end of the first cylinder (11) is tangentially fixedly connected to one end of the sixth tube (14). The upper end of the first cylinder (11) is fixedly connected to the lower end of the second cylinder (12). The side wall of the second cylinder (12) is fixedly connected to one end of the first tube (13). The first cavity (111) is located inside the first cylinder (11), and the second cavity (121) is located inside the second cylinder (12). The sixth tube (14), the first cavity (111), the second cavity (121), and the first tube (13) are sequentially connected inside each other.

4. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 3, characterized in that, The number of mesh plates (5) is not less than two, and the outer walls of several mesh plates (5) are fixedly connected to the inner wall of the first cavity (111). The mesh plates (5) are located above the sixth tube (14).

5. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 4, characterized in that, The adjustment mechanism (6) also includes an arc panel (63), the outer wall of the column (61) is fixedly connected to the inner wall of the first cavity (111), the upper end of the moving component (62) is connected to the separation mechanism (2), the middle part of the moving component (62) is located in the third cavity (611), the lower end of the moving component (62) is fixedly connected to the upper surface of the arc panel (63), and the bottom surface of the arc panel (63) is provided with an arc opening (631). The moving component (62) includes a spiral blade (622), an eighth plate (623), and two third plates (621). The middle part of the eighth plate (623) is connected to the separation mechanism (2). The bottom surface of the eighth plate (623) is fixedly connected to the upper end of the first third plate (621). The lower end of the first third plate (621) is fixedly connected to the upper end of the spiral blade (622). The other end of the spiral blade (622) passes through the third cavity (611) and is fixedly connected to the upper end of the second third plate (621). The lower end of the second third plate (621) is fixedly connected to the upper surface of the arc panel (63). The outer wall of the spiral blade (622) is slidably connected to the inner wall of the third cavity (611). A sealing ring is provided at the sliding point between the spiral blade (622) and the third cavity (611).

6. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 5, characterized in that, The separation mechanism (2) further includes a first plate (22), a second plate (23), a ring plate (25), and a first rod (26). One end of the first plate (22) is fixedly connected to the outer wall of the upper end of the second cylinder (12). The side wall of the first plate (22) is fixedly connected to the base of the motor (21). The output shaft of the motor (21) is fixedly connected to one end of the first rod (26). The other end of the first rod (26) extends into the second cavity (121). The outer wall of the first rod (26) located inside the second cavity (121) is connected to the second plate. (23) The outer wall of the middle part is fixedly connected to the outer wall of the middle part of the eighth plate (623). The bottom surface of the outer ring of the second plate (23) is fixedly connected to the upper end of the mesh cylinder (24). The lower end of the mesh cylinder (24) is fixedly connected to the upper surface of the ring plate (25). The outer wall of the ring plate (25) is rotatably connected to the inner wall of the upper end of the first cavity (111). The second plate (23), the mesh cylinder (24) and the ring plate (25) separate the second cavity (121) into an inner cavity and an outer cavity. The slag scraping mechanism (7) is located in the inner cavity, and the backflushing mechanism (4) is located in the outer cavity.

7. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 6, characterized in that, The slag scraping mechanism (7) also includes an elastic component (72), one end of which is connected to the upper end of the column (61), the other end of which is connected to one end of the thrust component (73), and the other two ends of the thrust component (73) are connected to the eighth plate (623) and the scraper (71) respectively. The scraping surface of the scraper (71) abuts against the inner wall of the mesh cylinder (24). The elastic component (72) includes a fourth plate (721), a fifth plate (722), a plurality of second rods (723) and a plurality of springs (724). The lower end of the fourth plate (721) is fixedly connected to the upper end of the column (61). The interior of the fourth plate (721) is sleeved and slidably connected to the outer wall of the plurality of second rods (723). The same end of the plurality of second rods (723) is fixedly connected to the side wall of the fifth plate (722). The two ends of the plurality of springs (724) are respectively fixedly connected to the adjacent side of the fourth plate (721) and the fifth plate (722). The upper end of the fifth plate (722) is connected to the thrust component (73). The thrust assembly (73) includes a sixth plate (731) and a seventh plate (732). One end of the sixth plate (731) is fixedly connected to the side of the scraper (71) away from the mesh cylinder (24). One end of the seventh plate (732) is fixedly connected to the side of the eighth plate (623) away from the spiral blade (622). The side of the sixth plate (731) away from the scraper (71) and the side of the seventh plate (732) near the mesh cylinder (24) are both provided with ramps (733), and the ramps (733) of the sixth plate (731) and the seventh plate (732) abut against each other in a wedge shape.

8. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 7, characterized in that, The recoil mechanism (4) further includes a fourth tube (41) and a fifth tube (42). The outer wall of the middle part of the fourth tube (41) is fixedly connected to the inner wall of the second cylinder (12). One end of the fourth tube (41) located inside the second cavity (121) is fixedly connected to one end of the fifth tube (42). The side wall of the fifth tube (42) is fixedly connected to the same end of a plurality of nozzles (43). The other ends of the plurality of nozzles (43) are all facing the mesh cylinder (24). Some of the nozzles (43) and scrapers (71) are not on the same horizontal line in the radial section of the mesh cylinder (24).

9. The co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 8, characterized in that, The slag guiding mechanism (3) includes a second pipe body (31), a third pipe body (32), and a valve (33). The upper end of the second pipe body (31) is located in the inner cavity of the second cavity (121), and the upper end of the third pipe body (32) is located in the outer cavity of the second cavity (121). The lower ends of the second pipe body (31) and the third pipe body (32) are both located outside the first cylinder (11). The end of the second pipe body (31) located outside the first cylinder (11) is fixedly connected to the outer wall of the end of the third pipe body (32) located outside the first cylinder (11). The lower end of the third pipe body (32) is also fixedly connected to the outer wall of the sixth pipe body (14). The valve (33) is located inside the third pipe body (32) near the end of the sixth pipe body (14).

10. The process of the co-treatment device for medium and low concentration waste gas with small and medium air volume according to claim 9, comprising the following steps: Step 1: Connect and fix the external exhaust gas source pipe to the sixth pipe body (14), connect the first pipe body (13) to the external clean air pipe, connect the external flushing clean water pipe to the fourth pipe body (41), and start the motor (21) to complete the preparation work; Step 2: External exhaust gas enters the first cavity (111) tangentially through the sixth pipe (14) and generates tangential flow, which throws out the larger waste particles inside the exhaust gas and causes them to settle to the bottom of the first cavity (111) due to gravity. Then the exhaust gas rises and passes through several mesh plates (5) in sequence, further blocking relatively smaller solid particles through the mesh holes. Step 3: The waste gas after primary filtration enters the third spiral chamber (611) of the column (61) and spirals upward. It comes into countercurrent contact with the flushing water that enters the second chamber (121) and flows downward to wash it. Then the spiral airflow hits the inner wall of the screen cylinder (24). The screen cylinder (24) is driven by the motor (21) to rotate at high speed to generate centrifugal force to intercept the solid slag. The purified gas passes through the mesh of the screen cylinder (24) and enters the outer chamber before being discharged through the first pipe (13). Step 4: When the exhaust gas moves upward, it generates a thrust on the arc panel (63). The greater the wind force, the higher the arc panel (63) rises. Then, the ramp (733) pushes the scraper (71) towards the mesh cylinder (24), realizing adaptive scraping where the stronger the wind force, the tighter the scraping. At the same time, water is sprayed from the outside of the mesh cylinder (24) through the nozzle (43) for backwashing, achieving double cleaning inside and outside. Step 5: The mud scraped off and washed by the scraper (71) falls into the second tube (31) of the sludge guiding mechanism (3). The valve (33) is opened at regular intervals. The negative pressure and airflow generated by the high-speed entry of the exhaust gas inside the sixth tube (14) blow the mud back to the bottom of the first chamber (111) for unified collection.

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