Industrial waste gas separation and purification device

Abstract

The invention discloses an industrial waste gas separating and purifying device which comprises a treatment box, a water tank, a filtering and separating assembly located in the treatment box and a gas outlet assembly located in the treatment box, an inverted-cone-shaped liquid collecting hopper is formed at the bottom of the treatment box, and the liquid collecting hopper is in welded communication with the top end of the water tank through a first communicating pipe; a waste gas inlet pipe and a waste gas outlet pipe are welded and communicated to the outer walls of the two sides of the water tank correspondingly, a heat exchange pipe is arranged in the water tank, the waste gas inlet pipe and the waste gas outlet pipe are in flange sealing connection with the gas inlet end and the gas outlet end of the heat exchange pipe correspondingly, and the waste gas outlet pipe conveys waste gas into a gas outlet assembly through a flow dividing assembly. The filtering and separating assembly comprises a water collecting box, and a plurality of groups of filtering columns which are distributed in parallel are arranged in the water collecting box. According to the invention, a dry type and a wet type are combined, so that flying dust is avoided in the whole filtering and separating process, cleaning and beating are not needed in the subsequent process, and secondary pollution is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas treatment, and more particularly, to an industrial waste gas separation and purification device. Background Art

[0002] At present, the treatment of industrial waste gas mainly includes two stages: dust removal and removal of harmful components. Among them, dust removal technologies are mainly divided into two categories: dry dust removal and wet dust removal.

[0003] Dry dust removal technology filters and separates particulate matter in waste gas through devices such as filter screens and electrostatic precipitators. Although the dry dust removal efficiency is relatively high, the filter screen is prone to clogging after long-term use and needs to be cleaned regularly. For example, the prior art (publication number: CN118142270B) discloses an industrial waste gas dust separation device that realizes automatic cleaning by rotating a gas filtration container and flipping a filter screen. However, secondary dust emission is easily caused during the cleaning process, resulting in secondary pollution, and frequent maintenance increases the operating cost.

[0004] Wet dust removal technology captures particulate matter in waste gas through methods such as water film or spraying, which can effectively avoid the problem of secondary dust emission. However, wet dust removal requires a large amount of water resources, and the generated wastewater needs to be further treated, increasing the subsequent treatment cost and complexity. In addition, for high-flow waste gas, the contact time between dust and droplets is insufficient, and the dust removal efficiency will decrease significantly, making it difficult to meet the requirements of high-efficiency purification.

[0005] In summary, the existing dry and wet dust removal technologies both have obvious limitations: dry dust removal is prone to secondary pollution, and wet dust removal has a large water consumption and poor adaptability to high-flow waste gas. Therefore, there is an urgent need to develop a new type of industrial waste gas separation and purification device that can combine the advantages of dry and wet dust removal, avoid secondary pollution, and at the same time reduce resource consumption and maintenance costs to meet the high-efficiency purification requirements under different working conditions. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the object of the present invention is to provide an industrial waste gas separation and purification device, including a treatment tank and a water tank, a filter separation component located in the treatment tank, and an air outlet component located in the treatment tank.

[0008] A liquid collection hopper in an inverted cone shape is formed at the bottom of the treatment tank. The liquid collection hopper is welded and communicated with the top end of the water tank through a first connecting pipe. Exhaust gas inlet pipes and exhaust gas outlet pipes are respectively welded and communicated with the outer walls on both sides of the water tank. A heat exchange pipe is arranged inside the water tank. The exhaust gas inlet pipe and the exhaust gas outlet pipe are respectively flange-sealedly connected to the intake end and the outlet end of the heat exchange pipe. The exhaust gas outlet pipe conveys the exhaust gas into the air outlet component through a shunt component.

[0009] The filtering and separating component includes a water collecting box which has a second bottom plate. A water adding pipe is fixedly welded to the top end of the water collecting box, and the top end of the water adding pipe passes through the inside of the treatment box. A plurality of groups of filter columns are arranged in parallel inside the water collecting box, and through holes for the filter columns to pass through are formed in the second bottom plate.

[0010] The air outlet component includes two air outlet boxes. A vertical plate is integrally formed inside the air outlet box. A sealed air collecting cavity is formed by enclosing between one side of the vertical plate and the inner wall of the air outlet box. The other side of the vertical plate extends horizontally outwards to form a plurality of parallel distribution guide plates, and air outlet holes are evenly formed in the vertical plate between two adjacent guide plates.

[0011] As a preferred technical solution:

[0012] For an industrial waste gas separation and purification device as described above, conical exhaust hoods are fixedly welded and communicated with the outer walls on both sides of the treatment box, and the two exhaust hoods are arranged at different heights.

[0013] Through the above technical solution, after the industrial waste gas is ejected through the air outlet component and passes through the filtering and separating component, particulate dust impurities in the industrial waste gas will be separated out. The industrial waste gas after preliminary dust removal is centrally discharged through the exhaust hood for subsequent treatment.

[0014] For an industrial waste gas separation and purification device as described above, the bottom of the water tank is in an open shape, and a first bottom plate is hermetically attached by bolts at the open bottom of the water tank.

[0015] Through the above technical solution, after the first bottom plate is disassembled, the open bottom of the water tank will be exposed, which is convenient for cleaning the surface of the heat exchange pipe and avoiding the influence of scale formation on the heat exchange pipe surface on its heat conduction effect.

[0016] For an industrial waste gas separation and purification device as described above, a first steam outlet pipe is fixedly welded and communicated with the outer wall of one side of the water tank. A fan is bolted to the side wall of the treatment box. The air inlet end of the fan is butt-jointed by flange with one end of the first steam outlet pipe, and the air outlet end of the fan is butt-jointed by flange with a condenser through a second steam outlet pipe.

[0017] The condenser is fixed on the top of the treatment box. The condensate discharge pipe of the condenser is butt-jointed by flange with one end of the water inlet pipe, and the other end of the water inlet pipe passes through the top wall of the treatment box and is fixedly welded and communicated with the top wall of the water collecting box.

[0018] Through the above technical solution, after the water in the water tank is heated to boiling, the fan can transport the generated water vapor to the condenser through the first steam outlet pipe and the second steam outlet pipe. The condenser converts the water vapor into condensate water and discharges it, so that the steam can be recovered and the recycling of water resources can be realized.

[0019] An industrial waste gas separation and purification device as described above, one side of the two air outlet boxes is open, the two air outlet boxes are arranged at different heights, and the width of the air outlet box is less than the distribution distance of each group of filter columns.

[0020] Through the above technical solution, the height design of the two air outlet boxes enables the gases to be ejected alternately without being blocked or interfered by the air outlet boxes, avoiding affecting the dust removal effect. At the same time, the width design of the air outlet boxes enables the ejected air flow to fully contact each filter column, ensuring the dust removal effect.

[0021] An industrial waste gas separation and purification device as described above, the number of filter columns in each group is greater than two, and the multiple filter columns in each group are arranged side by side at equal intervals, and the filter columns in adjacent groups are arranged in a staggered manner.

[0022] Through the above technical solution, the staggered design of the filter columns causes the flow direction of the gas to change after passing through a row of filter columns, and then the gas will contact another row of filter columns again. In this way, through repeated reciprocation, it can be ensured that the gas can collide with the filter columns multiple times and contact the water film sufficiently, thereby improving the dry and wet dust removal effects.

[0023] An industrial waste gas separation and purification device as described above, the filter column is made of cylindrical ceramic material, an extension column extends vertically upward from the top of the filter column, a through hole groove is formed in the axial direction of the filter column and the extension column, the diameter of the extension column is smaller than the diameter of the filter column, a sleeve is sleeved outside the extension column, the outer wall of the sleeve is fixedly bonded to the inner wall of the through hole, and the inner diameter of the sleeve is the same as the diameter of the filter column.

[0024] Through the above technical solution, the shape design of the filter column makes its surface a curved surface. In this way, after the gas collides with the filter column, it will be divided into two streams and continue to flow along its surface, thereby changing the flow direction. At the same time, a gap is formed between the sleeve and the extension column. After the water cooling flows downward through this gap, a water film will be formed on the surface of the filter column. In this way, when the gas flows along the surface of the filter column, it can fully contact the water film, and the water film can capture the tiny dust in the gas, improving the dust removal effect.

[0025] An industrial waste gas separation and purification device as described above, a plurality of fixing cylinders corresponding to the filter columns one by one are welded and fixed to the inner wall of the top of the water collection box, threads are provided on the inner wall of the fixing cylinder and the outer wall of the extension column, and holes are formed in the outer circular wall of the top of the fixing cylinder.

[0026] Through the above technical solution, the fixing cylinder and the extension column are connected by threads, so that the filter column is a detachable installation structure, which is convenient for subsequent maintenance.

[0027] An industrial waste gas separation and purification device as described above, the shunt assembly includes a fixed box, a spherical reversing box is welded and fixed inside the fixed box, the waste gas outlet pipe passes through the fixed box and is welded and communicated with the reversing box, the reversing box is welded and communicated with two second communication pipes, and one end of each of the two second communication pipes passes through the fixed box and penetrates into the treatment box and is welded and communicated with the outer wall of the air outlet box on one side of the gas collection cavity. The two second communication pipes and the waste gas outlet pipe are distributed in a T shape.

[0028] A reversing ball is arranged inside the reversing box, an L-shaped reversing groove is formed inside the reversing ball, both ends of the reversing groove are communicated with the spherical surface of the reversing ball, and a first slot hole and a second slot hole are respectively formed at the communicating positions of both ends of the reversing groove with the spherical surface of the reversing ball.

[0029] A rotating rod is welded and fixed on the outer wall of the reversing ball, and the rotating rod passes through the walls of the fixed box and the reversing box.

[0030] Through the above technical solution, the rotating rod is connected with the reversing box in a bearing-sealed manner, and a servo motor is installed on the fixed box. The output shaft of the servo motor is butted against the rotating rod. In this way, the servo motor can drive the reversing ball to rotate inside the reversing box through the rotating rod. By changing the direction of the reversing groove on the reversing ball, the communication between the two second communication pipes and the waste gas outlet pipe can be switched.

[0031] Compared with the prior art, the present invention has at least the following beneficial effects:

[0032] (1) High-efficiency dust removal and prevention of secondary pollution. The present invention forms a filter array through multiple vertically staggered filter columns. When the waste gas passes through, it collides with the filter columns multiple times, and high-efficiency separation of large-particle dust is achieved by utilizing the difference in inertial force. At the same time, the water film covering the surface of the filter columns can capture fine dust, forming a collaborative purification mechanism of "dry interception + wet adsorption". This design not only avoids the problem of secondary dust raising during dry dust removal and ash cleaning, but also overcomes the disadvantage of large water resource consumption in wet dust removal, realizing continuous dust removal operation without secondary pollution.

[0033] (2) Heat energy recovery and water cycle utilization. The energy and resource optimization utilization of the waste gas purification process is realized through a multi-stage coupling mechanism. The core design of this system is to effectively conduct the waste heat of high-temperature industrial waste gas to the sewage in the water tank through the heat exchange pipe. This design has multiple advantages:

[0034] First, the heat exchange process not only avoids the thermal damage that may be caused by the direct contact between high-temperature waste gas and the filter component, but more importantly, it realizes the effective recovery and utilization of waste heat resources. When the temperature of the waste gas reaches a certain value, the heat exchange tube can heat the sewage to the evaporation temperature, and the generated water vapor is converted into clean condensed water through the condensation system. These condensed waters are re-transported to the top of the filter column through a specially designed pipeline system, continuously forming a new water film, thus realizing the closed-loop recycling of water resources.

[0035] Secondly, the uniqueness of this system lies in the organic combination of the water treatment process and the waste gas purification process. During the evaporation process of the sewage, the solid particles and impurities contained in the water are naturally separated and deposited at the bottom of the water tank, forming solid residues that are easy to clean. This self-purification mechanism not only significantly reduces the amount of wastewater that needs to be discharged for treatment, but also simplifies the necessary pretreatment link in the traditional water treatment process.

[0036] More innovatively, this system creatively integrates three key links: waste heat recovery, water resource recycling, and pollutant treatment into an organic whole. Through the cascade utilization of heat energy and the internal recycling of water resources, it not only greatly reduces the demand for fresh water in the system operation, but also reduces the dependence on external energy, significantly enhancing the economy and sustainability of the entire waste gas treatment process. This "energy-water resource-pollutant" collaborative treatment mode realizes the dual optimization of operation cost and environmental benefits while ensuring the waste gas purification effect.

[0037] (3) Modular design with adaptive working conditions, the height of the filter column is adjustable, and the dry, wet, or hybrid dust removal modes can be quickly switched through a threaded structure, which can be flexibly adapted to different working conditions such as hydrophobic dust and high-humidity waste gas. The shunt component controls the alternating operation of the double outlet boxes through a reversing ball to ensure uniform coverage of the water film and avoid the decrease in dust removal efficiency caused by local drying, significantly enhancing the stability and adaptability of the device operation.

[0038] (4) Convenient maintenance and long-term operation ability, the bottom of the water tank is designed with a detachable bottom plate to facilitate the cleaning of the deposits on the surface of the heat exchange tube; the filter column and the water collection box are assembled modularly, supporting quick replacement or cleaning. In addition, the vacuum pump auxiliary system can forcibly evaporate the sewage under the condition of low-temperature waste gas to ensure the all-weather operation of the water circulation system. The above design will reduce the maintenance frequency and effectively extend the service life of the device. Brief Description of the Drawings

[0039] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which

[0040] Figure 1 is the front view of the present invention;

[0041] Figure 2 Side view of the present invention;

[0042] Figure 3 Front internal view of the processing box of the present invention;

[0043] Figure 4 Stereogram of the water tank of the present invention;

[0044] Figure 5 Stereo sectional view of the air outlet box of the present invention;

[0045] Figure 6 Front vertical sectional view of the water collection box and the filter column of the present invention;

[0046] Figure 7 Top view of the air outlet box and the filter column of the present invention;

[0047] Figure 8 Top horizontal sectional view of the fixed box and the commutation box of the present invention;

[0048] Figure 9 Front view of the commutation ball, the first slot hole and the second slot hole of the present invention.

[0049] In the figure: 1. Processing box; 2. Water tank; 3. Liquid collection hopper;4. First communication pipe; 5. Exhaust gas inlet pipe; 6. Exhaust gas outlet pipe; 7. Heat exchange pipe; 8. First bottom plate; 9. Fixed box; 10. Commutation box; 11. Commutation ball; 12. Commutation groove; 121. First slot hole; 122. Second slot hole; 13. Second communication pipe; 14. Air outlet box; 15. Gas collection cavity; 16. Vertical plate; 17. Deflector; 18. Air outlet hole; 19. Water collection box; 20. Second bottom plate; 21. Sleeve; 22. Filter column; 23. First steam outlet pipe; 24. Second steam outlet pipe; 25. Condenser; 26. Water inlet pipe; 27. Exhaust hood; 28. Water filling pipe; 29. Rotating rod; 30. Extension column; 31. Fixed cylinder. Detailed implementation manners

[0050] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0051] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0052] Please refer to Figures 1-6As shown in the figure, the present invention provides a technical solution: an industrial waste gas separation and purification device, which includes a treatment tank 1 and a water tank 2, a filter separation component located in the treatment tank 1, and an air outlet component located in the treatment tank 1.

[0053] A liquid collecting hopper 3 with an inverted cone shape is formed at the bottom of the treatment tank 1. The liquid collecting hopper 3 is welded and communicated with the top end of the water tank 2 through a first connecting pipe 4. An exhaust gas inlet pipe 5 and an exhaust gas outlet pipe 6 are respectively welded and communicated with the outer walls on both sides of the water tank 2. A heat exchange pipe 7 is arranged inside the water tank 2. The exhaust gas inlet pipe 5 and the exhaust gas outlet pipe 6 are respectively flange-sealedly connected to the air inlet end and the air outlet end of the heat exchange pipe 7. The exhaust gas outlet pipe 6 conveys the exhaust gas into the air outlet component through a shunt component.

[0054] The filter separation component includes a water collecting box 19. The water collecting box 19 has a second bottom plate 20. A water adding pipe 28 is welded and fixed to the top end of the water collecting box 19. The top end of the water adding pipe 28 passes through the treatment tank 1. A plurality of groups of filter columns 22 distributed in parallel are arranged inside the water collecting box 19. Through holes for the filter columns 22 to pass through are formed on the second bottom plate 20.

[0055] The air outlet component includes two air outlet boxes 14. A vertical plate 16 is integrally formed inside the air outlet box 14. A sealed air collecting cavity 15 is formed between one side of the vertical plate 16 and the inner wall of the air outlet box 14. The other side of the vertical plate 16 extends horizontally outwards to form a plurality of parallel distributed guide plates 17. Air outlet holes 18 are evenly formed on the vertical plate 16 between two adjacent guide plates 17.

[0056] During operation, the water adding pipe 28 can be docked with an external pipeline. Water is injected into the water collecting box 19 through the water adding pipe 28. The water in the water collecting box 19 will be shunted to each through hole. The water-cooling flows down along the filter columns 22 from the through holes, and thus a water film can be formed on the surface of the filter columns 22. The water flowing on the filter columns 22 will finally be concentrated in the liquid collecting hopper 3 and enter the water tank 2 through the first connecting pipe 4.

[0057] The exhaust gas to be treated is introduced into the exhaust gas inlet pipe 5 through an induced draft fan. The exhaust gas will flow along the heat exchange pipe 7 to the exhaust gas outlet pipe 6. During this process, the heat in the exhaust gas will be conducted to the water inside the water tank 2 through the heat exchange pipe 7. When the temperature of the exhaust gas is higher than 100 °C, the water will be heated and evaporated.

[0058] The exhaust gas outlet pipe 6 introduces the exhaust gas into the gas collecting cavity 15 through the shunt assembly. The gap between two adjacent flow guiding plates 17 forms a flat flow guiding groove. The gas in the gas collecting cavity 15 is shunted into each flow guiding groove through the air outlet holes 18, and finally the gas is ejected from the open end of the air outlet box 14. The ejected air flow is in a flat layer shape and finally collides with multiple groups of filter columns 22. During the collision process, the air flow will flow along the surface of the filter columns 22 and change its flow direction. Due to the different inertial forces of dust and gas, when the flow direction of the gas changes sharply, the dust with larger particles will be separated from the air flow. And during the collision process, a water film also covers the surface of some filter columns 22, and the fine particulate dust in the gas will be captured by the water film. The particulate dust separated by inertia directly falls into the liquid collecting hopper 3 under the action of gravity, while the fine particulate dust will flow downward wrapped by the water film to the liquid collecting hopper 3. Finally, the waste water mixed with particulate dust is concentrated in the water tank 2 through the first connecting pipe 4.

[0059] As Figure 3 shown, conical exhaust hoods 27 are welded and connected to the outer walls on both sides of the treatment box 1. The two exhaust hoods 27 are arranged at different heights. The opposite sides of the two air outlet boxes 14 are open. The two air outlet boxes 14 are arranged at different heights, and the width of the air outlet box 14 is less than the distribution distance of each group of filter columns 22.

[0060] It can be understood that the gas ejected from the air outlet box 14 at a higher position will be centrally discharged through the exhaust hood 27 at a higher position after being dust-removed by the filter columns 22. Similarly, the gas ejected from the air outlet box 14 at a lower position will be centrally discharged through the exhaust hood 27 at a lower position after being dust-removed by the filter columns 22. Therefore, the two exhaust hoods 27 and the two air outlet boxes 14 cooperate with each other to ensure smooth exhaust.

[0061] As Figure 4 shown, the bottom of the water tank 2 is open, and a first bottom plate 8 is hermetically attached to the open bottom of the water tank 2 by bolts.

[0062] A valve is provided on the first connecting pipe 4. The waste water mixed with particulate dust will finally be concentrated in the water tank 2. When the heat in the exhaust gas heats the waste water through the heat exchange pipe 7, the water will evaporate, and the particulate dust impurities will be retained and deposited on the surfaces of the first bottom plate 8 and the heat exchange pipe 7. If it is necessary to clean the impurities, the valve is controlled to close the first connecting pipe 4. At this time, the first bottom plate 8 can be removed, and the impurities on the surface of the heat exchange pipe 7 can be cleaned, or the impurities on the first bottom plate 8 can be cleaned.

[0063] As Figure 1 and Figure 2As shown in the figure, a first steam outlet pipe 23 is welded and connected to the outer wall on one side of the water tank 2. A fan is bolted to the side wall of the treatment tank 1. The intake end of the fan is flange-connected to one end of the first steam outlet pipe 23, and the outlet end of the fan is flange-connected to the condenser 25 through a second steam outlet pipe 24.

[0064] The condenser 25 is fixed to the top of the treatment tank 1. The condensate discharge pipe of the condenser 25 is flange-connected to one end of the water inlet pipe 26, and the other end of the water inlet pipe 26 passes through the top wall of the treatment tank 1 and is welded and connected to the top wall of the water collection box 19.

[0065] The wastewater in the water tank 2 is heated and boiled to form water vapor under the action of the waste gas heat. At this time, the fan can be started. The fan can suck the water vapor into the first steam outlet pipe 23 and send it into the condenser 25 through the second steam outlet pipe 24. The condenser 25 converts the water vapor into condensed water and sends it into the water collection box 19 through the water inlet pipe 26. In this way, the recycling of water resources can be realized. At this time, there is no need to inject water through the water injection pipe 28, which can reduce the water consumption during the dust removal process.

[0066] A vacuum pump is connected to one side of the water tank 2 through a vacuum extraction pipe. Since the temperature of the waste gas is uncertain, when treating waste gas with a temperature lower than 100 °C, the vacuum pump can be started to perform a vacuum pumping operation on the inside of the water tank 2. This can reduce the boiling point of water and enable boiling evaporation at a temperature lower than 100 °C.

[0067] A valve is also provided on the first steam outlet pipe 23. By closing the first steam outlet pipe 23 and the first connecting pipe 4 with the valve, the vacuum degree inside the water tank 2 can be ensured not to be affected.

[0068] As Figure 6 and Figure 7 shown, the number of each group of filter columns 22 is more than two, and the multiple filter columns 22 in each group are arranged side by side at equal intervals. The filter columns 22 in adjacent two groups are distributed in a staggered manner.

[0069] The filter column 22 is made of cylindrical ceramic material. An extension column 30 extends vertically upward from the top end of the filter column 22. A through hole groove is provided in the axial direction of the filter column 22 and the extension column 30. The diameter of the extension column 30 is smaller than the diameter of the filter column 22. A sleeve 21 is sleeved outside the extension column 30. The outer wall of the sleeve 21 is fixedly bonded to the inner wall of the through hole, and the inner diameter of the sleeve 21 is the same as the diameter of the filter column 22.

[0070] A plurality of fixing cylinders 31 corresponding to the filter columns 22 one by one are welded and fixed to the inner wall of the top end of the water collection box 19. The inner wall of the fixing cylinder 31 and the outer wall of the extension column 30 are provided with matching threads. A hole is provided in the outer circular wall at the top end of the fixing cylinder 31.

[0071] The extension column 30 can be rotated within the fixed cylinder 31, so that the height of the filter column 22 can be adjusted during the rotation. When rotating upward, the filter column 22 can be driven upward to fit with the sleeve 21. At this time, the through hole at the filter column 22 is blocked, which means that no water flows down. By adjusting the filter column 22, the device has three dust removal methods.

[0072] The first one is that all the filter columns 22 are moved to fit with the sleeve 21, so that no water film will be formed on the surface of the filter column 22, thereby achieving dry dust removal through multiple filter columns 22. In this process, since the through holes cannot drain water, the water in the water collection box 19 can only enter the interior through the holes on the fixed cylinder 31, and flow downward from the holes in the filter column 22 and the extension column 30, and finally flow into the water tank 2.

[0073] The second type is that if the filter column 22 is not in contact with the sleeve 21, there will be a water film on the surface of each filter column 22, so that wet dust removal can be achieved through the water film. After the exhaust gas passes through multiple filter columns 22, it will come into contact with the water film multiple times, so that the water film can capture fine particles of dust and flow into the water tank 2 together.

[0074] The third type is that since there are multiple groups of filter columns 22, each group is arranged side by side, the filter columns 22 in several selected groups are moved to fit with the sleeve 21. In this way, the multiple groups of filter columns 22 include both filter columns with water film on the surface and filter columns without water film on the surface. When the exhaust gas passes through the multiple groups of filter columns 22, dry dust removal and wet dust removal will be performed in turn. The combination of dry and wet methods can improve the dust removal effect.

[0075] Depending on the properties of the exhaust gas, different dust removal methods can be freely selected. For example, when dealing with hydrophobic dust, only dry dust removal can be used.

[0076] like Figure 7 、 Figure 8 and Figure 9 As shown, the diversion assembly includes a fixed box 9, a spherical reversing box 10 is welded and fixed inside the fixed box 9, the exhaust gas outlet pipe 6 passes through the fixed box 9 and is welded to the reversing box 10, and the reversing box 10 is welded to two second connecting pipes 13, one end of the two second connecting pipes 13 passes through the fixed box 9 and passes into the processing box 1 and is welded to the outer wall of the outlet box 14 on one side of the gas collecting chamber 15, and the two second connecting pipes 13 are distributed in a T shape with the exhaust gas outlet pipe 6.

[0077] A reversing ball 11 is provided in the reversing box 10, and an L-shaped reversing groove 12 is opened inside the reversing ball 11. Both ends of the reversing groove 12 are connected to the spherical surface of the reversing ball 11, and a first slot hole 121 and a second slot hole 122 are formed at the connection points between the two ends of the reversing groove 12 and the spherical surface of the reversing ball 11 respectively.

[0078] A rotating rod 29 is fixedly welded to the outer wall of the reversing ball 11, and the rotating rod 29 passes through the walls of the fixed box 9 and the reversing box 10.

[0079] The waste gas enters the reversing box 10 through the waste gas outlet pipe 6. At this time, the waste gas enters the reversing groove 12 through the first slot hole 121, and is ejected through the second slot hole 122 and enters the second communicating pipe 13 on the left. When the servo motor drives the reversing ball 11 to rotate 90° through the rotating rod 29, at this time, the second slot hole 122 is aligned with the waste gas outlet pipe 6, and the first slot hole 121 is aligned with a second communicating pipe 13 on the right. In this way, the waste gas can enter the second communicating pipe 13 on the left through the reversing groove 12.

[0080] By controlling the reversing ball 11 to rotate 90° forward and backward, the two second communicating pipes 13 can be switched to communicate with the waste gas outlet pipe 6 alternately. This design avoids a gas outlet box 14 discharging waste gas for a long time. Since the waste gas will carry away part of the water film when impacting the filter column 22, this will cause a blank without a water film on the surface of the filter column 22, resulting in incomplete treatment of the waste gas. By alternately discharging the waste gas through the two gas outlet boxes 14, it can ensure that the surface of the filter column 22 is always evenly covered with a layer of water film, improving the wet dust removal effect.

[0081] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An industrial waste gas separation and purification device, comprising a treatment tank (1) and a water tank (2), a filtration and separation component located in the treatment tank (1), and an air outlet component located in the treatment tank (1), characterized in that: A liquid collecting hopper (3) in an inverted cone shape is formed at the bottom of the treatment box (1). The liquid collecting hopper (3) is welded and communicated with the top end of a water tank (2) through a first communication pipe (4). Exhaust gas inlet pipes (5) and exhaust gas outlet pipes (6) are respectively welded and communicated with the outer walls on both sides of the water tank (2). A heat exchange pipe (7) is arranged inside the water tank (2). The exhaust gas inlet pipe (5) and the exhaust gas outlet pipe (6) are respectively flange-sealedly connected to the air inlet end and the air outlet end of the heat exchange pipe (7). The exhaust gas outlet pipe (6) conveys exhaust gas into an air outlet assembly through a flow splitting assembly; The filtration and separation assembly includes a water collecting box (19). The water collecting box (19) has a second bottom plate (20). A water adding pipe (28) is welded and fixed to the top end of the water collecting box (19). The top end of the water adding pipe (28) penetrates out of the treatment box (1). A plurality of groups of filter columns (22) are arranged in parallel inside the water collecting box (19). Through holes for the filter columns (22) to penetrate are formed in the second bottom plate (20); The air outlet assembly includes two air outlet boxes (14). A vertical plate (16) is integrally formed inside the air outlet box (14). A closed air collecting cavity (15) is formed by enclosing between one side of the vertical plate (16) and the inner wall of the air outlet box (14). A plurality of parallel distribution guide plates (17) extend horizontally outward on the other side of the vertical plate (16). Air outlet holes (18) are evenly formed in the vertical plate (16) between two adjacent guide plates (17).

2. An industrial waste gas separation and purification device according to claim 1, characterized in that: Conical exhaust hoods (27) are respectively welded and communicated with the outer walls on both sides of the treatment box (1). The two exhaust hoods (27) are arranged at different heights.

3. An industrial waste gas separation and purification device according to claim 1, characterized in that: The bottom of the water tank (2) is in an open shape. A first bottom plate (8) is bolt-sealed and attached to the open bottom of the water tank (2).

4. An industrial waste gas separation and purification device according to claim 1, characterized in that: A first steam outlet pipe (23) is welded and communicated with the outer wall of one side of the water tank (2). A fan is bolt-fixed on the side wall of the treatment box (1). The air inlet end of the fan is flange-docked with one end of the first steam outlet pipe (23). The air outlet end of the fan is flange-docked with a condenser (25) through a second steam outlet pipe (24), The condenser (25) is fixed on the top of the treatment box (1). The condensate discharge pipe of the condenser (25) is flange-docked with one end of a water inlet pipe (26). The other end of the water inlet pipe (26) penetrates through the top wall of the treatment box (1) and is welded and communicated with the top wall of the water collecting box (19).

5. An industrial waste gas separation and purification device according to claim 1, characterized in that: The opposite sides of the two air outlet boxes (14) are in an open shape. The two air outlet boxes (14) are arranged at different heights, and the width of the air outlet box (14) is smaller than the distribution distance of each group of filter columns (22).

6. An industrial waste gas separation and purification device according to claim 1, characterized in that: The number of each group of filter columns (22) is more than two, and the multiple filter columns (22) in each group are arranged side by side at equal intervals. The filter columns (22) in adjacent two groups are distributed in a staggered manner.

7. An industrial waste gas separation and purification device according to claim 6, characterized in that: The filter column (22) is made of cylindrical ceramic material. An extension column (30) extends vertically upward from the top end of the filter column (22). A through hole groove is provided in the axial direction of the filter column (22) and the extension column (30). The diameter of the extension column (30) is smaller than that of the filter column (22). A sleeve (21) is sleeved outside the extension column (30). The outer wall of the sleeve (21) is fixedly bonded to the inner wall of the through hole. The inner diameter of the sleeve (21) is the same as the diameter of the filter column (22).

8. An industrial waste gas separation and purification device according to claim 1, characterized in that: A plurality of fixing cylinders (31) corresponding to the filter columns (22) one by one are welded and fixed to the inner wall of the top end of the water collecting box (19). Matching threads are provided on the inner wall of the fixing cylinder (31) and the outer wall of the extension column (30). A hole is provided in the outer circular wall of the top end of the fixing cylinder (31).

9. The industrial waste gas separation and purification device according to claim 1, wherein: The flow dividing assembly includes a fixing box (9). A spherical reversing box (10) is welded and fixed inside the fixing box (9). The exhaust gas outlet pipe (6) passes through the fixing box (9) and is welded and communicated with the reversing box (10). The reversing box (10) is welded and communicated with two second communicating pipes (13). One ends of the two second communicating pipes (13) pass out of the fixing box (9) and penetrate into the processing box (1) and are welded and communicated with the outer wall of an air outlet box (14) on one side of the air collecting cavity (15). The two second communicating pipes (13) and the exhaust gas outlet pipe (6) are distributed in a T shape.

10. An industrial waste gas separation and purification device according to claim 9, characterized in that: A reversing ball (11) is arranged inside the reversing box (10). An L-shaped reversing groove (12) is provided inside the reversing ball (11). Both ends of the reversing groove (12) are communicated with the spherical surface of the reversing ball (11). First slot holes (121) and second slot holes (122) are respectively formed at the communicating positions of both ends of the reversing groove (12) and the spherical surface of the reversing ball (11). A rotating rod (29) is welded and fixed to the outer wall of the reversing ball (11). The rotating rod (29) passes through the walls of the fixing box (9) and the reversing box (10).

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