Energy-saving and environment-friendly waste gas purification equipment for papermaking

Abstract

This invention discloses an energy-saving and environmentally friendly waste gas purification device for papermaking, belonging to the field of waste gas treatment and purification technology. It includes a tank; a tilting packing support assembly for supporting and tilting the packing is fixedly connected inside the tank; a liquid addition assembly for alkali circulation spraying, alkali feeding, and waste liquid discharge is fixedly connected to the tank, with the spray end of the liquid addition assembly located on the top of the packing on the tilting packing support assembly; and a self-cleaning filter assembly is fixedly connected to the lower end of the tank. This invention achieves continuous cleaning and continuous filtration without requiring machine shutdown, and the adjustment method is simple, making it more energy-efficient and environmentally friendly. Simultaneously, the follow-up gas outlet assembly disperses the gas into the tank, improving gas dispersion and facilitating acid washing. Furthermore, the tilting packing support assembly can drive the packing to tilt, changing the gas flow path through the packing and further improving gas dispersion, facilitating full contact between the gas and the alkali.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment and purification technology, specifically to an energy-saving and environmentally friendly waste gas purification device for papermaking. Background Technology

[0002] Paper production generates a large amount of waste gas, which contains a large amount of particulate matter and acidic components. These particulate matter and acidic components are generally purified using purification equipment.

[0003] Chinese patent application CN206778150U discloses a waste gas purification device for a paper mill, comprising a purification tower and a purification chamber. The purification tower and the purification chamber are connected by a connecting pipe. An air inlet is provided on one side of the purification chamber, and an air inlet pipe is connected to the air inlet. An air outlet is provided at the top of the purification tower. Several spray nozzles are provided inside the purification tower, with at least four groups of spray nozzles arranged from top to bottom. Spray nozzles in the same group are connected by a group of spray water branch pipes. All spray water branch pipes are interconnected and connected to the spray nozzles. A water outlet is provided at the bottom of the purification tower, and a filter element is installed inside the purification chamber. Compared with the prior art, this utility model, by removing dust, physically filtering, and absorbing by spraying, can maximize the filtration and absorption of harmful substances in the waste gas. The wastewater obtained from spraying can be catalytically reduced to generate industrial raw materials, achieving the recycling of industrial raw materials while avoiding environmental pollution and saving costs.

[0004] However, the physical structure of the above-mentioned structure needs to be cleaned after particulate matter filtration, which is beneficial for production line use. At the same time, the gas flow channel is fixed during the packing spray absorption, and the adsorption efficiency needs to be improved.

[0005] Based on this, the present invention designs an energy-saving and environmentally friendly waste gas purification device for papermaking to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an energy-saving and environmentally friendly waste gas purification device for papermaking.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An energy-saving and environmentally friendly waste gas purification device for papermaking includes a tank.

[0009] The tank is fixedly connected with a tilting packing support assembly for supporting and tilting the packing.

[0010] The tank body is fixedly connected to a liquid addition assembly for alkaline solution circulation spraying, alkaline solution feeding and waste liquid discharge. The spray end of the liquid addition assembly is located on the top of the packing on the tilting packing support assembly.

[0011] A self-cleaning filter assembly is fixedly connected to the lower end of the tank.

[0012] The self-cleaning filter assembly includes a filter assembly, a dust removal assembly, a follow-up air outlet assembly, horizontal pipes, an air inlet pipe, and an adjustable air guide assembly. The bottom of the adjustable air guide assembly is fixedly connected to the top of the air inlet pipe. One end of each of the two sets of horizontal pipes is symmetrically fixedly installed at the air holes at the lower end of the horizontal pipes. One end of each of the two sets of dust removal assemblies is symmetrically fixedly installed at the air holes at the upper end of the adjustable air guide assembly. The other end of the horizontal pipes is connected and fixedly connected to the filter assembly. The air outlet of the dust removal assembly is located above the filter section of the filter assembly. The top of each filter assembly is fixedly connected to the follow-up air outlet assembly, which is fixedly connected to the tank body. The air outlet of the follow-up air outlet assembly is located inside the tank body. When cleaning the dust inside the left-side filter assembly, the adjustable air guide assembly connects the air inlet pipe with the right-side horizontal pipe and the left-side follow-up air outlet assembly, allowing some air to pass through. The gas enters the right-side filter assembly for normal filtration, while a portion of the gas enters the left-side cleaning assembly for cleaning. After cleaning the left-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the right-side horizontal pipe, while disconnecting all follow-up outlet components. All gas then enters the right-side filter assembly for filtration. When cleaning the dust in the right-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the left-side horizontal pipe and the right-side follow-up outlet components. A portion of the gas enters the left-side filter assembly for normal filtration, while a portion of the gas enters the right-side cleaning assembly for cleaning. After cleaning the right-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the left-side horizontal pipe, while disconnecting all follow-up outlet components. All gas then enters the left-side filter assembly for filtration.

[0013] Furthermore, the adjustable air guide assembly includes a second motor, an outer cylinder, a valve core, a first L-shaped hole, a second through hole, and a second L-shaped hole. The bottom of the outer cylinder is fixedly connected to the top of the air inlet pipe. The second motor is fixedly installed on the top of the outer cylinder. The output end of the second motor is fixedly connected to the valve core. The outer wall of the valve core is slidably connected to the inner wall of the outer cylinder. The lower end of the valve core has a first L-shaped hole. The valve core has a second through hole at the bend of the first L-shaped hole. The angle between the horizontal part of the second through hole and the horizontal part of the first L-shaped hole in the horizontal plane is 90 degrees. The top of the valve core at the bend of the first L-shaped hole is fixedly connected to the second L-shaped hole. The air outlet of the second L-shaped hole and the air outlet of the first L-shaped hole are located on the left and right sides of the valve core. One end of each of the two sets of horizontal pipes is symmetrically fixedly installed at the air hole at the lower end of the outer cylinder. The air outlets of the second through hole and the first L-shaped hole are at the same horizontal level as the horizontal pipe. One end of each of the two sets of dust removal components is symmetrically fixedly installed at the air hole at the upper end of the outer cylinder. The second L-shaped hole and the air inlet of the connecting pipe are at the same horizontal level.

[0014] Furthermore, the filter assembly includes a filter box and a filter plate. The filter plate is fixedly installed inside the filter box, and the horizontal pipe is fixedly connected to the filter box. The horizontal pipe is set lower than the filter plate. The air outlet end of the follow-up air outlet assembly is located at the top of the filter plate, and the dust scraping end of the follow-up air outlet assembly is located at the bottom of the filter plate.

[0015] Furthermore, a ash discharge pipe is fixedly connected to the bottom of the filter box, and a control valve is fixedly connected to the ash discharge pipe.

[0016] Furthermore, the dust removal assembly includes a connecting pipe, a first through hole, a spray pipe, a scraper, a second horizontal shaft, a third bevel gear, a fourth bevel gear, an annular cover, a straight hole, a fifth bevel gear, a sixth bevel gear, a second straight shaft, and a first impeller. The connecting pipe is fixedly installed at the air hole at the upper end of the outer cylinder. The horizontal part of the connecting pipe is rotatably connected to the second straight shaft via a bearing. The first impeller is fixedly installed on the part of the second straight shaft located inside the connecting pipe. The sixth bevel gear is fixedly installed on the second straight shaft and meshes with the fifth bevel gear. The second horizontal shaft is fixedly installed inside the fifth bevel gear and rotatably connected to the filter box via a bearing. The end of the second horizontal shaft located inside the filter box is connected to... The third bevel gear is fixedly connected, and the third bevel gear meshes with the fourth bevel gear. The center of the filter plate is rotatably connected to the third straight shaft via a bearing. The fourth bevel gear is fixedly installed on the upper end of the third straight shaft. An annular cover is fixedly connected to the end of the connecting pipe inside the filter box. The inner wall of the annular cover is slidably connected to the outer wall of the third straight shaft. A straight hole is opened in the third straight shaft. A first through hole is opened at both the upper and lower ends of the straight hole. The first through hole at the upper end is located on the inner wall of the annular cover. A spray pipe is fixedly connected to the third straight shaft and communicates with the first through hole at the lower end. The spray pipe is located at the top of the filter plate, and the air outlet of the spray pipe faces downward. A scraper is fixedly connected to the bottom of the third straight shaft, and the top of the scraper is slidably connected to the bottom of the filter plate.

[0017] Furthermore, the scraper and nozzle are located on both sides of the third straight axis.

[0018] Furthermore, the follow-up air outlet assembly includes an air outlet pipe, an air collection pipe, a second impeller, a fourth straight shaft, oblique holes, and a rotating cover. The air outlet pipe is fixedly installed on the top of the filter box and is fixedly connected to the air collection pipe. The transverse part of the air collection pipe is rotatably connected to the fourth straight shaft through a bearing. The upper end of the fourth straight shaft is fixedly connected to the second impeller, which is located inside the transverse part of the air collection pipe. The bottom of the fourth straight shaft is fixedly connected to the rotating cover, and the rotating cover is rotatably connected to the output end of the air collection pipe. The rotating cover has oblique holes at equal intervals along the circumference.

[0019] Furthermore, the fourth vertical axis is set coaxially with the tank body.

[0020] Furthermore, the inclined holes are set at an angle downwards.

[0021] Furthermore, the chemical formula for purifying the exhaust gas inside the tank is: .

[0022] Compared to existing technologies, the advantages of this invention are as follows: When cleaning the dust in the left-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the right-side horizontal pipe and the left-side follow-up air outlet assembly. A portion of the gas enters the right-side filter assembly for normal filtration, while another portion enters the left-side cleaning assembly for cleaning. After cleaning the left-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the right-side horizontal pipe, and closes all follow-up air outlet assemblies. All gas enters the right-side filter assembly for filtration. When cleaning the dust in the right-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the left-side horizontal pipe and the right-side follow-up air outlet assembly, allowing a portion of the gas to pass through. The gas enters the left-side filter assembly for normal filtration. A portion of the gas then enters the right-side cleaning assembly for cleaning. After cleaning the right-side filter assembly, the adjustable air guide assembly connects the inlet pipe to the left-side horizontal pipe, while all follow-up air outlet components are disconnected. All gas then enters the left-side filter assembly for filtration, achieving continuous cleaning and continuous filtration without requiring shutdown. The adjustment method is simple, energy-efficient, and environmentally friendly. Simultaneously, the follow-up air outlet components disperse the gas into the tank, improving gas dispersion and facilitating acid washing. Furthermore, the agitated packing support assembly can agitate the packing, altering the gas flow path through the packing and further enhancing gas dispersion, ensuring sufficient contact between the gas and the alkali solution. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0024] Figure 1 This invention relates to a three-dimensional energy-saving and environmentally friendly waste gas purification device for papermaking. Figure 1 ;

[0025] Figure 2 This is a front view of an energy-saving and environmentally friendly waste gas purification device for papermaking according to the present invention;

[0026] Figure 3 This invention relates to a three-dimensional energy-saving and environmentally friendly waste gas purification device for papermaking. Figure 2 ;

[0027] Figure 4 This invention relates to a three-dimensional energy-saving and environmentally friendly waste gas purification device for papermaking. Figure 3 ;

[0028] Figure 5 For along Figure 2 A three-dimensional image with a portion removed along the AA direction;

[0029] Figure 6 This is a partial sectional view of the rotating hood gas collection connection structure;

[0030] Figure 7 Three-dimensional self-cleaning filter components Figure 1 ;

[0031] Figure 8 Right view of the self-cleaning filter assembly;

[0032] Figure 9 For along Figure 8 BB direction sectional view;

[0033] Figure 10 for Figure 9 Enlarged view of the structure at point C;

[0034] Figure 11 for Figure 9 Enlarged view of the structure at point D.

[0035] The labels in the diagram represent:

[0036] 1. Tank body; 2. Tilting packing support assembly; 21. Motor; 22. First horizontal shaft; 23. First bevel gear; 24. Inclined guide plate; 25. Hollow plate; 26. Second bevel gear; 27. First straight shaft; 3. Liquid filling assembly; 31. First straight pipe; 32. First horizontal pipe; 33. Liquid inlet pipe; 34. Liquid pump; 35. Two inlet and one outlet control valve; 36. Two outlet and one inlet control valve; 37. Drain pipe; 38. Outlet pipe; 39. Annular nozzle; 4. Self-cleaning filter assembly; 41. Filter assembly; 411. Filter box; 412. Ash discharge pipe; 413. Control valve; 414. Filter plate; 42. Ash cleaning assembly; 421. Connecting pipe; 422. First through hole; 423. Spray pipe; 424. Scraper; 42 5. Second horizontal shaft; 426. Third bevel gear; 427. Fourth bevel gear; 428. Annular cover; 429. Straight hole; 4210. Fifth bevel gear; 4211. Sixth bevel gear; 4212. Second straight shaft; 4213. First impeller; 4214. Third straight shaft; 43. Follow-up air outlet assembly; 431. Air outlet pipe; 432. Air collection pipe; 433. Second impeller; 434. Fourth straight shaft; 435. Inclined hole; 436. Rotating cover; 44. Horizontal pipe; 45. Air inlet pipe; 46. Adjustable air guide assembly; 461. Second motor; 462. Outer cylinder; 463. Valve core; 464. First L-shaped hole; 465. Second through hole; 466. Second L-shaped hole; 5. pH meter; 6. Liquid level sensor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0039] Example 1, please refer to Figures 1-11 An energy-saving and environmentally friendly waste gas purification device for papermaking, comprising a tank 1;

[0040] A tilting packing support assembly 2 for supporting and tilting the packing is fixedly connected inside the tank body 1;

[0041] The tank body 1 is fixedly connected to a liquid addition assembly 3 for alkaline solution circulation spraying, alkaline solution feeding and waste liquid discharge. The spray end of the liquid addition assembly 3 is located on the top of the packing on the tilting packing support assembly 2.

[0042] A self-cleaning filter assembly 4 is fixedly connected to the lower end of the tank body 1;

[0043] The self-cleaning filter assembly 4 includes a filter assembly 41, a dust removal assembly 42, a follow-up air outlet assembly 43, a horizontal pipe 44, an air inlet pipe 45, and an adjustable air guide assembly 46. The bottom of the adjustable air guide assembly 46 is fixedly connected to the top of the air inlet pipe 45. One end of each of the two sets of horizontal pipes 44 is symmetrically fixedly installed at the air holes at the lower end of the horizontal pipes 44. One end of each of the two sets of dust removal assemblies 42 is symmetrically fixedly installed at the air holes at the upper end of the adjustable air guide assembly 46. The other end of the horizontal pipes 44 is connected to the filter assembly 41. The air outlet of the dust removal assembly 42 is located above the filter section of the filter assembly 41. The top of each filter assembly 41 is fixedly connected to the follow-up air outlet assembly 43. The follow-up air outlet assembly 43 is fixedly connected to the tank 1. The air outlet of the follow-up air outlet assembly 43 is located inside the tank 1. When cleaning the dust in the filter assembly 41 on the left, the adjustable air guide assembly 46 connects the air inlet pipe 45 with the horizontal pipe 44 on the right and the follow-up air outlet assembly 43 on the left. A portion of the gas enters the right-side filter assembly 41 for normal filtration, while another portion enters the left-side cleaning assembly 42 for cleaning. After cleaning the left-side filter assembly 41, the adjustable air guide assembly 46 connects the inlet pipe 45 to the right-side horizontal pipe 44, while disconnecting all the follow-up air outlet assemblies 43. All gas then enters the right-side filter assembly 41 for filtration. When cleaning the dust in the right-side filter assembly 41, the adjustable air guide assembly 46 connects the inlet pipe 45 to the left-side horizontal pipe 44 and the right-side follow-up air outlet assemblies 43. A portion of the gas enters the left-side filter assembly 41 for normal filtration, while another portion enters the right-side cleaning assembly 42 for cleaning. After cleaning the right-side filter assembly 41, the adjustable air guide assembly 46 connects the inlet pipe 45 to the left-side horizontal pipe 44, while disconnecting all the follow-up air outlet assemblies 43. All gas then enters the left-side filter assembly 41 for filtration.

[0044] When cleaning the dust inside the left filter assembly 41, the adjustable air guide assembly 46 connects the inlet pipe 45 with the right horizontal pipe 44 and the left follow-up air outlet assembly 43. Part of the gas enters the right filter assembly 41 for normal filtration, and part of the gas enters the left dust removal assembly 42 for cleaning. After cleaning the left filter assembly 41, the adjustable air guide assembly 46 connects the inlet pipe 45 with the right horizontal pipe 44, and closes all follow-up air outlet assemblies 43. All gas enters the right filter assembly 41 for filtration. When cleaning the dust inside the right filter assembly 41, the adjustable air guide assembly 46 connects the inlet pipe 45 with the left horizontal pipe 44 and the right follow-up air outlet assembly 43. Part of the gas enters the right filter assembly 41 for normal filtration. The gas is filtered normally in the filter assembly 41 on the left. A portion of the gas enters the cleaning assembly 42 on the right for cleaning. After the filter assembly 41 on the right is cleaned, the adjustable air guide assembly 46 connects the air inlet pipe 45 to the horizontal pipe 44 on the left, while all the follow-up air outlet assemblies 43 are not connected. All the gas enters the filter assembly 41 on the left for filtration, achieving continuous cleaning and continuous filtration without the need for shutdown. The adjustment method is simple and more energy-efficient and environmentally friendly. At the same time, the follow-up air outlet assembly 43 sprays the gas into the tank 1 in a dispersed manner, improving the gas dispersion and facilitating acid washing. In addition, the flipping packing support assembly 2 can drive the packing to flip, changing the flow channel of the gas through the packing, further improving the gas dispersion and facilitating full contact between the gas and the alkali solution.

[0045] The adjustable air guide assembly 46 includes a second motor 461, an outer cylinder 462, a valve core 463, a first L-shaped hole 464, a second through hole 465, and a second L-shaped hole 466. The bottom of the outer cylinder 462 is fixedly connected to the top of the air inlet pipe 45. The second motor 461 is fixedly installed on the top of the outer cylinder 462. The output end of the second motor 461 is fixedly connected to the valve core 463. The outer wall of the valve core 463 is slidably connected to the inner wall of the outer cylinder 462. The lower end of the valve core 463 has a first L-shaped hole 464. The valve core 463 has a second through hole 465 at the bend of the first L-shaped hole 464, and the second through hole 465 is horizontal with the first L-shaped hole 464. The angle between the parts in the horizontal plane is 90 degrees. The valve core 463 is fixedly connected to the top of the bend of the first L-shaped hole 464 with a second L-shaped hole 466. The air outlet of the second L-shaped hole 466 and the air outlet of the first L-shaped hole 464 are located on the left and right sides of the valve core 463. One end of the two sets of horizontal pipes 44 are symmetrically fixedly installed at the air holes opened at the lower end of the outer cylinder 462. The air outlets of the second through hole 465 and the first L-shaped hole 464 are at the same horizontal end as the horizontal pipes 44. One end of the two sets of dust removal components 42 are symmetrically fixedly installed at the air holes opened at the upper end of the outer cylinder 462. The second L-shaped hole 466 and the air inlet of the connecting pipe 421 are at the same horizontal plane.

[0046] The air inlet pipe 45 is fixedly connected to the output end of the air collection equipment in the workshop;

[0047] The filter assembly 41 includes a filter box 411 and a filter plate 414. The filter plate 414 is fixedly installed inside the filter box 411. The horizontal pipe 44 is fixedly connected to the filter box 411 and is set lower than the filter plate 414. The air outlet end of the follow-up air outlet assembly 43 is located at the top of the filter plate 414, and the dust scraping end of the follow-up air outlet assembly 43 is located at the bottom of the filter plate 414.

[0048] A ash discharge pipe 412 is fixedly connected to the bottom of the filter box 411, and a control valve 413 is fixedly connected to the ash discharge pipe 412.

[0049] The dust removal assembly 42 includes a connecting pipe 421, a first through hole 422, a spray pipe 423, a scraper 424, a second horizontal shaft 425, a third bevel gear 426, a fourth bevel gear 427, an annular cover 428, a straight hole 429, a fifth bevel gear 4210, a sixth bevel gear 4211, a second straight shaft 4212, and a first impeller 4213. The connecting pipe 421 is fixedly installed at the air hole at the upper end of the outer cylinder 462. The transverse portion of the connecting pipe 421 is connected to the second straight shaft 4212 via a bearing. A first impeller 4213 is fixedly installed on the part of the second straight shaft 4212 located inside the connecting pipe 421. A sixth bevel gear 4211 is fixedly installed on the second straight shaft 4212 and meshes with a fifth bevel gear 4210. A second horizontal shaft 425 is fixedly installed inside the fifth bevel gear 4210 and is rotatably connected to the filter box 411 via a bearing. The end of the second horizontal shaft 425 located inside the filter box 411 is fixedly connected to a third bevel gear 426, which meshes with a fourth bevel gear 427. The center of the filter plate 414 is rotatably connected to the third straight shaft 4214 via a bearing. The fourth bevel gear 427 is fixedly installed on the upper end of the third straight shaft 4214. An annular cover 428 is fixedly connected to the end of the connecting pipe 421 located inside the filter box 411. The inner wall of the annular cover 428 is slidably connected to the outer wall of the third straight shaft 4214. The third straight shaft 4214 is open inside. A straight hole 429 is provided, and a first through hole 422 is provided at both the upper and lower ends of the straight hole 429. The first through hole 422 at the upper end is located on the inner wall of the annular cover 428. A third straight shaft 4214 is fixedly connected to a nozzle 423 that communicates with the first through hole 422 at the lower end. The nozzle 423 is located at the top of the filter plate 414, and the air outlet of the nozzle 423 faces downward. A scraper 424 is fixedly connected to the bottom of the third straight shaft 4214, and the top of the scraper 424 is in contact with and slidably connected to the bottom of the filter plate 414.

[0050] The scraper 424 and the nozzle 423 are located on both sides of the third straight axis 4214.

[0051] The follow-up air outlet assembly 43 includes an air outlet pipe 431, an air collection pipe 432, a second impeller 433, a fourth straight shaft 434, oblique holes 435, and a rotating cover 436. The air outlet pipe 431 is fixedly installed on the top of the filter box 411. The air outlet pipe 431 is fixedly connected to the air collection pipe 432. The transverse part of the air collection pipe 432 is rotatably connected to the fourth straight shaft 434 through a bearing. The upper end of the fourth straight shaft 434 is fixedly connected to the second impeller 433, and the second impeller 433 is located in the transverse part of the air collection pipe 432. The bottom of the fourth straight shaft 434 is fixedly connected to the rotating cover 436. The rotating cover 436 is rotatably connected to the output end of the air collection pipe 432. The rotating cover 436 has oblique holes 435 at equal intervals along the circumference.

[0052] The fourth straight axis 434 is coaxially arranged with tank body 1;

[0053] The 435-degree angled hole is set at an angle downwards.

[0054] When cleaning the dust inside the filter plate 414 of the left-side filter assembly 41, the second motor 461 of the adjustable air guide assembly 46 drives the valve core 463 to rotate. The valve core 463 drives the first L-shaped hole 464 and the second L-shaped hole 466 to rotate. The first L-shaped hole 464 connects the air inlet pipe 45 to the right-side horizontal pipe 44. The first L-shaped hole 464 and the second L-shaped hole 466 cooperate to connect the air inlet pipe 45 to the left-side follow-up air outlet assembly 43. A portion of the gas in the air inlet pipe 45 enters through the first L-shaped hole 464 and goes to the right-side horizontal pipe 44, then into the right-side filter box 411, and then undergoes normal filtration through the filter plate 414. A portion of the gas in the air inlet pipe 45 enters through the first L-shaped hole 464 and the second L-shaped hole 466 into the connecting pipe 421 of the left-side dust removal assembly 42, then into the annular cover 428, and then through the upper first L-shaped hole 464. A through-hole 422 enters into a straight hole 429, and then enters the nozzle 423 through the lower first through-hole 422 and is sprayed downwards. At the same time, the gas in the connecting pipe 421 drives the first impeller 4213 to rotate. The first impeller 4213 drives the second straight shaft 4212 to rotate. The second straight shaft 4212 drives the sixth bevel gear 4211 to rotate. The sixth bevel gear 4211 drives the fifth bevel gear 4210 to rotate. The fifth bevel gear 4210 drives the second horizontal shaft 425 to rotate. The second horizontal shaft 425 drives the third straight shaft 4214 to rotate. The third straight shaft 4214 drives the nozzle 423 and the scraper 424 to rotate. The scraper 424 rotates along the left filter plate 414 to scrape away the dust at the bottom of the left filter plate 414. At the same time, the nozzle 423 flushes the dust in the filter holes of the left filter plate 414 down, which is conducive to cleaning the dust in the left filter plate 414.

[0055] After the filter plate 414 on the left is cleaned, the second motor 461 of the adjustable air guide assembly 46 drives the valve core 463 to continue rotating 90 degrees. The valve core 463 drives the second through hole 465 to face the horizontal pipe 44 on the right. The first L-shaped hole 464 and the second through hole 465 connect the air inlet pipe 45 with the horizontal pipe 44 on the right. The solid part of the valve core 463 blocks all the follow-up air outlet assemblies 43. All the follow-up air outlet assemblies 43 are not connected. All the gas in the air inlet pipe 45 enters the horizontal pipe 44 on the right through the first L-shaped hole 464 and the second through hole 465, and enters the filter box 411 on the right for filtration. The filter plate 414 on the right is then filtered.

[0056] When the filter plate 414 on the right is filtering normally, the filter plate 414 on the left does not need to be cleaned continuously after cleaning.

[0057] When cleaning the dust from the filter plate 414 inside the right-side filter assembly 41, the second motor 461 of the adjustable air guide assembly 46 drives the valve core 463 to rotate 90 degrees. The valve core 463 drives the first L-shaped hole 464 and the second L-shaped hole 466 to rotate. The first L-shaped hole 464 connects the air inlet pipe 45 to the horizontal pipe 44 on the left. The first L-shaped hole 464 and the second L-shaped hole 466 cooperate to connect the air inlet pipe 45 to the right-side follow-up air outlet assembly 43. A portion of the gas in the air inlet pipe 45 enters through the first L-shaped hole 464 and goes to the horizontal pipe 44 on the left, then into the filter box 411 on the left, and then undergoes normal filtration through the filter plate 414 on the left. A portion of the gas in the air inlet pipe 45 enters through the first L-shaped hole 464 and the second L-shaped hole 466 into the connecting pipe 421 of the right-side dust removal assembly 42, and then into the annular cover 428, and then through... The gas enters the straight hole 429 through the first through hole 422 on the upper side, and then enters the nozzle 423 through the first through hole 422 on the lower side and is sprayed downwards. At the same time, the gas in the connecting pipe 421 drives the first impeller 4213 to rotate. The first impeller 4213 drives the second straight shaft 4212 to rotate. The second straight shaft 4212 drives the sixth bevel gear 4211 to rotate. The sixth bevel gear 4211 drives the fifth bevel gear 4210 to rotate. The fifth bevel gear 4210 drives the second horizontal shaft 425 to rotate. The second horizontal shaft 425 drives the third straight shaft 4214 to rotate. The third straight shaft 4214 drives the nozzle 423 and the scraper 424 to rotate. The scraper 424 rotates along the filter plate 414 on the right side to scrape off the dust at the bottom of the filter plate 414. At the same time, the nozzle 423 flushes the dust in the filter holes of the filter plate 414 on the right side down, which is conducive to cleaning the dust in the filter plate 414 on the right side.

[0058] After cleaning the filter assembly 41 on the right, the second motor 461 of the adjustable air guide assembly 46 drives the valve core 463 to continue rotating 90 degrees. The valve core 463 drives the second through hole 465 to face the horizontal pipe 44 on the left. The first L-shaped hole 464 and the second through hole 465 connect the air inlet pipe 45 with the horizontal pipe 44 on the left. The solid part of the valve core 463 blocks all the follow-up air outlet assemblies 43. All the follow-up air outlet assemblies 43 are not connected. All the gas in the air inlet pipe 45 enters the horizontal pipe 44 on the left through the first L-shaped hole 464 and the second through hole 465, and enters the filter box 411 on the left. The filter plate 414 on the left performs filtration. When the filter plate 414 on the right is filtering normally, the filter plate 414 on the left does not need to be cleaned continuously after cleaning.

[0059] It enables continuous cleaning and filtration without requiring downtime.

[0060] The gas filtered by the filter plate 414 enters the outlet pipe 431 of the follow-up gas outlet assembly 43, then enters the gas collection pipe 432, and then enters the rotating shroud 436. It is then ejected from the inclined hole 435. The gas in the gas collection pipe 432 drives the fourth straight shaft 434 to rotate through the second impeller 433. The fourth straight shaft 434 drives the rotating shroud 436 to rotate along the gas collection pipe 432. The rotating shroud 436 drives the inclined hole 435 to rotate and spray gas. The inclined hole 435 disperses the gas filtered by the filter plate 414 into the tank 1, improving the gas dispersion and facilitating acid washing.

[0061] The tilting packing support assembly 2 includes a motor 21, a first horizontal shaft 22, a first bevel gear 23, an inclined guide plate 24, a perforated plate 25, a second bevel gear 26, and a first vertical shaft 27. The motor 21 is fixedly installed on the outer wall of the tank body 1. The first horizontal shaft 22 is fixedly installed at the output end of the motor 21. The first horizontal shaft 22 is fixedly installed in the through hole of the first bevel gear 23. The first bevel gear 23 is meshed with the second bevel gear 26. The first vertical shaft 27 is fixedly installed in the mounting hole opened in the second bevel gear 26. Two sets of perforated plates 25 are fixedly installed at the upper and lower ends of the first vertical shaft 27, and the perforated plates 25 are rotatably connected to the inner wall of the tank body 1 through bearings. Multiple sets of inclined guide plates 24 are fixedly connected above the perforated plates 25 in the tank body 1, and the inclined guide plates 24 are arranged circumferentially on the inner wall of the tank body 1.

[0062] When the filtered gas enters the acid mist cleaning tank 1, the motor 21 of the flipping packing support assembly 2 drives the first horizontal shaft 22 to rotate, the first horizontal shaft 22 drives the first bevel gear 23 to rotate, the first bevel gear 23 drives the second bevel gear 26 to rotate, the second bevel gear 26 drives the first vertical shaft 27 to rotate, the first vertical shaft 27 drives the perforated plate 25 to rotate, and the perforated plate 25 drives the packing on the perforated plate 25 to rotate. Under the guidance of the inclined guide plate 24, the packing on the perforated plate 25 rotates and flips, changing the flow channel of the gas through the packing, further improving the gas dispersion, and facilitating full contact between the gas and the alkali solution.

[0063] The liquid filling assembly 3 includes a first straight pipe 31, a first horizontal pipe 32, a liquid inlet pipe 33, a liquid pump 34, a two-inlet-one-outlet control valve 35, a two-outlet-one-inlet control valve 36, a drain pipe 37, an outlet pipe 38, and an annular spray pipe 39. The upper and lower ends of the outlet pipe 38 are respectively installed at the bottom of the tank body 1 and the input end of the two-inlet-one-outlet control valve 36. One set of output ends of the two-inlet-one-outlet control valve 36 is fixedly connected to the drain pipe 37, and the other set of output ends of the two-inlet-one-outlet control valve 36 is connected to the two-inlet-one-outlet control valve 35 through a pipe. One set of input terminals is fixedly connected, and the other set of input terminals of the two-in-one-out control valve 35 is fixedly connected to the liquid inlet pipe 33. The output terminal of the two-in-one-out control valve 35 is fixedly connected to the input terminal of the liquid pump 34 through a pipe. The output terminal of the liquid pump 34 is fixedly connected to the first straight pipe 31. Two sets of first horizontal pipes 32 are fixedly connected to the first straight pipe 31. An annular nozzle 39 is fixedly connected to the part of the first horizontal pipe 32 located inside the tank body 1, and the annular nozzle 39 is located above the packing on the hollow plate 25.

[0064] The drain pipe 37 is connected to the waste liquid collection pipe, and the inlet pipe 33 is connected to the alkali storage equipment.

[0065] A pH meter 5 for acidity and alkalinity detection and a liquid level sensor 6 for liquid level detection are installed on the lower end of the inner wall of tank 1.

[0066] During pickling, the two-in-one-out control valve 36 is connected to the two-in-one-out control valve 35, and the two-in-one-out control valve 35 is connected to the two-in-one-out control valve 36. The liquid pump 34 draws the alkaline solution in the tank 1 into the first straight pipe 31 through the liquid outlet pipe 38, the two-in-one-out control valve 36 and the two-in-one-out control valve 35, and then into the first horizontal pipe 32. Finally, it is sprayed out from the annular spray pipe 39 to realize the alkaline solution circulation pickling.

[0067] When pH meter 5 detects that the pH is lower than the set requirement, the two-outlet-one-inlet control valve 36 is opened to the drain pipe 37, and the alkaline solution in tank 1 is discharged from the drain pipe 37 under its own gravity. When liquid level sensor 6 detects that the liquid level is lower than the set value, the two-outlet-one-inlet control valve 36 is opened to the two-inlet-one-outlet control valve 35, and the two-inlet-one-outlet control valve 35 is opened to the inlet pipe 33. The liquid pump 34 draws the alkaline solution in the alkaline solution storage device into the first straight pipe 31 through the inlet pipe 33, then into the first horizontal pipe 32, and finally into the annular nozzle 39 for spraying. When a certain amount of alkaline solution is added to tank 1, the alkaline solution replacement is achieved.

[0068] The chemical formula for purifying the exhaust gas inside the tank is: .

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy-saving and environmentally friendly waste gas purification device for papermaking, comprising a tank (1), characterized in that: The tank body (1) is fixedly connected with a flipping packing support assembly (2) for packing support and flipping. The tank body (1) is fixedly connected to a liquid addition assembly (3) for alkaline solution circulation spraying, alkaline solution feeding and waste liquid discharge. The spray end of the liquid addition assembly (3) is located on the top of the packing on the tilting packing support assembly (2). A self-cleaning filter assembly (4) is fixedly connected to the lower end of the tank (1); The self-cleaning filter assembly (4) includes a filter assembly (41), a dust removal assembly (42), a follow-up air outlet assembly (43), a horizontal pipe (44), an air inlet pipe (45), and an adjustable air guide assembly (46). The bottom of the adjustable air guide assembly (46) is fixedly connected to the top of the air inlet pipe (45). One end of each of the two sets of horizontal pipes (44) is symmetrically fixedly installed at the air holes opened at the lower end of the horizontal pipes (44). One end of each of the two sets of dust removal assemblies (42) is symmetrically fixedly installed at the air holes opened at the upper end of the adjustable air guide assembly (46). The other end is fixedly connected to the filter assembly (41). The air outlet of the dust removal assembly (42) is located above the filter part of the filter assembly (41). The top of the filter assembly (41) is fixedly connected to the follow-up air outlet assembly (43). The follow-up air outlet assembly (43) is fixedly connected to the tank (1). The air outlet of the follow-up air outlet assembly (43) is located inside the tank (1). When cleaning the dust in the filter assembly (41) on the left, the adjustable air guide assembly (46) connects the air inlet pipe (45) with the horizontal pipe (44) on the right and the follow-up air outlet assembly on the left. When component (43) is open, a portion of the gas enters the filter assembly (41) on the right for normal filtration, and a portion of the gas enters the dust removal assembly (42) on the left for cleaning. After the filter assembly (41) on the left is cleaned, the adjustable air guide assembly (46) connects the inlet pipe (45) to the horizontal pipe (44) on the right, and all the follow-up air outlet components (43) are closed. All the gas enters the filter assembly (41) on the right for filtration. When cleaning the dust in the filter assembly (41) on the right, the adjustable air guide assembly (46) connects the inlet pipe (45) to the horizontal pipe (44) on the right. The intake pipe (45) is connected to the horizontal pipe (44) on the left and the follow-up air outlet assembly (43) on the right. Part of the gas enters the filter assembly (41) on the left for normal filtration, and part of the gas enters the cleaning assembly (42) on the right for cleaning. After the filter assembly (41) on the right is cleaned, the regulating air guide assembly (46) connects the intake pipe (45) to the horizontal pipe (44) on the left and all the follow-up air outlet assemblies (43) are not connected. All the gas enters the filter assembly (41) on the left for filtration.

2. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 1, characterized in that, The adjustable air guide assembly (46) includes a second motor (461), an outer cylinder (462), a valve core (463), a first L-shaped hole (464), a second through hole (465), and a second L-shaped hole (466). The bottom of the outer cylinder (462) is fixedly connected to the top of the air inlet pipe (45). The second motor (461) is fixedly installed on the top of the outer cylinder (462). The output end of the second motor (461) is fixedly connected to the valve core (463). The outer wall of the valve core (463) is slidably connected to the inner wall of the outer cylinder (462). The lower end of the valve core (463) has a first L-shaped hole (464). The valve core (463) has a second through hole (465) at the bend of the first L-shaped hole (464), and the second through hole (465) is connected to the first L-shaped hole (466). The horizontal part of 464) has an angle of 90 degrees in the horizontal direction. The valve core (463) is fixedly connected to the top of the bend of the first L-shaped hole (464) with a second L-shaped hole (466). The air outlet of the second L-shaped hole (466) and the air outlet of the first L-shaped hole (464) are located on the left and right sides of the valve core (463). One end of the two sets of horizontal pipes (44) is symmetrically fixedly installed at the air hole opened at the lower end of the outer cylinder (462). The air outlet of the second through hole (465) and the first L-shaped hole (464) are at the same horizontal end as the horizontal pipe (44). One end of the two sets of dust removal components (42) is symmetrically fixedly installed at the air hole opened at the upper end of the outer cylinder (462). The second L-shaped hole (466) and the air inlet of the connecting pipe (421) are at the same horizontal plane.

3. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 2, characterized in that, The filter assembly (41) includes a filter box (411) and a filter plate (414). The filter plate (414) is fixedly installed inside the filter box (411). The horizontal pipe (44) is fixedly connected to the filter box (411) and is set lower than the filter plate (414). The air outlet end of the follow-up air outlet assembly (43) is located at the top of the filter plate (414), and the dust scraping end of the follow-up air outlet assembly (43) is located at the bottom of the filter plate (414).

4. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 3, characterized in that, A ash discharge pipe (412) is fixedly connected to the bottom of the filter box (411), and a control valve (413) is fixedly connected to the ash discharge pipe (412).

5. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 4, characterized in that, The dust removal assembly (42) includes a connecting pipe (421), a first through hole (422), a spray pipe (423), a scraper (424), a second horizontal shaft (425), a third bevel gear (426), a fourth bevel gear (427), an annular cover (428), a straight hole (429), a fifth bevel gear (4210), a sixth bevel gear (4211), a second straight shaft (4212), and a first impeller (4213). The connecting pipe (421) is fixedly installed at the air hole at the upper end of the outer cylinder (462). The transverse part of the connecting pipe (421) passes through a shaft. The first impeller (4213) is fixedly installed on the second straight shaft (4212) located inside the connecting pipe (421). The sixth bevel gear (4211) is fixedly installed on the second straight shaft (4212) and meshes with the fifth bevel gear (4210). The second horizontal shaft (425) is fixedly installed inside the fifth bevel gear (4210) and is rotatably connected to the filter box (411) through a bearing. The second horizontal shaft (425) is located inside the filter box (411). 1) The end of the filter plate (414) is fixedly connected to the third bevel gear (426), the third bevel gear (426) meshes with the fourth bevel gear (427), the center of the filter plate (414) is rotatably connected to the third straight shaft (4214) through a bearing, the fourth bevel gear (427) is fixedly installed on the upper end of the third straight shaft (4214), the end of the connecting pipe (421) located inside the filter box (411) is fixedly connected to an annular cover (428), the inner wall of the annular cover (428) is in close contact with the outer wall of the third straight shaft (4214) and the third straight shaft (4214) is open A straight hole (429) is provided, and a first through hole (422) is provided at both the upper and lower ends of the straight hole (429). The first through hole (422) at the upper end is located on the inner wall of the annular cover (428). A nozzle (423) communicating with the first through hole (422) at the lower end is fixedly connected to the third straight shaft (4214). The nozzle (423) is located at the top of the filter plate (414), and the air outlet of the nozzle (423) faces downward. A scraper (424) is fixedly connected to the bottom of the third straight shaft (4214), and the top of the scraper (424) is in close contact with the bottom of the filter plate (414) and is slidably connected.

6. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 5, characterized in that, The scraper (424) and the nozzle (423) are located on both sides of the third straight axis (4214).

7. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 6, characterized in that, The follow-up air outlet assembly (43) includes an air outlet pipe (431), an air collection pipe (432), a second impeller (433), a fourth straight shaft (434), oblique holes (435), and a rotating cover (436). The air outlet pipe (431) is fixedly installed on the top of the filter box (411). The air outlet pipe (431) is fixedly connected to the air collection pipe (432). The transverse part of the air collection pipe (432) is rotatably connected to the fourth straight shaft (434) through a bearing. The upper end of the fourth straight shaft (434) is fixedly connected to the second impeller (433), and the second impeller (433) is located in the transverse part of the air collection pipe (432). The bottom of the fourth straight shaft (434) is fixedly connected to the rotating cover (436). The rotating cover (436) is rotatably connected to the output end of the air collection pipe (432). The rotating cover (436) has oblique holes (435) at equal intervals along the circumference.

8. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 7, characterized in that, The fourth straight axis (434) is set coaxially with the tank body (1).

9. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to claim 7, characterized in that, The oblique hole (435) is set obliquely downward.

10. The energy-saving and environmentally friendly waste gas purification equipment for papermaking according to any one of claims 1-9, characterized in that, The chemical formula for purifying the exhaust gas inside the tank (1) is as follows: .

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