Energy-saving chemical tail gas environmental protection treatment device

Abstract

The application discloses an energy-saving chemical tail gas environment-friendly treatment device, which comprises a treatment tower, multiple groups of spraying treatment units arranged vertically and spaced apart in a main treatment area, and a pretreatment assembly arranged in a pretreatment area. The treatment tower comprises the main treatment area and the pretreatment area. The spraying treatment unit comprises a spraying assembly for spraying treatment liquid and a filler assembly for facilitating the contact between the treatment liquid and the tail gas. The pretreatment assembly comprises an air inlet cover. The air inlet cover is provided with an air inlet for the tail gas to enter the air inlet cover and multiple air outlets arranged along the circumference of the air inlet cover and spaced apart for the tail gas to be discharged into the treatment tower. The air outlet is provided with a fixing seat, and the fixing seat is provided with a filter screen assembly. The filter screen assembly comprises a filter screen and an activated carbon filter screen. The activated carbon filter screen is located below the filter screen. The treatment liquid falling to the pretreatment area is in contact with the filter screen and forms a liquid film on the filter screen. The treatment efficiency of the tail gas is improved by the cooperation of the high-efficiency activated carbon and the spraying of the treatment liquid.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas treatment technology, specifically to an energy-saving environmental protection device for treating chemical exhaust gas. Background Technology

[0002] Currently, the chemical industry generates exhaust gases containing dust, acidic gases, or volatile organic compounds during production. Direct emission of these gases can cause serious harm, and they must be purified before they can meet emission standards. High-efficiency activated carbon filters and spray packing towers are commonly used equipment in the field of chemical exhaust gas purification. Both can effectively purify exhaust gases through gas-liquid contact and gas-adsorbent contact.

[0003] A search revealed a patent with publication number CN119386650B that discloses an odorous exhaust gas treatment device for the disposal of dead animals. This patent uses a dynamic arrangement of packing balls to change the upward flow path of the exhaust gas, increasing the reaction contact surface between the packing balls and the exhaust gas, thus allowing the exhaust gas and spray water to react fully. However, the use of spraying alone, neglecting the use of activated carbon, results in incomplete purification of the components in the exhaust gas. Furthermore, in terms of spraying, a significant portion of the sprayed treatment liquid drips downwards along the gaps in the packing due to factors such as spray angle deviation, exhaust gas flow rate disturbance, or continuous spraying mode. This directly dripping treatment liquid does not make sufficient contact with the exhaust gas, and the effective reagents it carries are not fully utilized before entering the circulation system, resulting in a large waste of treatment reagents and increasing the operating cost of exhaust gas treatment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an energy-saving chemical tail gas environmental protection treatment device, which enhances the tail gas treatment efficiency by spraying with high-efficiency activated carbon and treatment liquid.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: an energy-saving chemical waste gas environmental protection treatment device, comprising:

[0006] A processing tower, comprising a main processing area and a preprocessing area;

[0007] Multiple sets of spray treatment units are arranged vertically at intervals in the main treatment area. Each spray treatment unit includes a spray assembly for spraying out treatment liquid and a packing assembly for promoting contact between treatment liquid and exhaust gas.

[0008] A pretreatment component is disposed in the pretreatment area. The pretreatment component includes an air inlet hood, which has an air inlet for the exhaust gas to enter the hood and multiple air outlets arranged circumferentially around the air inlet for the exhaust gas to be discharged into the treatment tower. A fixing seat is provided at each air outlet, and a filter assembly is provided on the fixing seat.

[0009] The filter assembly includes a filter screen and an activated carbon filter screen. The activated carbon filter screen is located below the filter screen. The treatment liquid dripping into the pretreatment area comes into contact with the filter screen and forms a liquid film on the filter screen. When the exhaust gas passes through the exhaust port, it first comes into contact with the activated carbon filter screen and then with the liquid film.

[0010] Furthermore, to improve the integrity of the liquid film formation on the filter screen, the pretreatment component further includes:

[0011] A collection tray is disposed between the air inlet hood and the lowest spray treatment unit. The collection tray is connected to the treatment tower and is used to collect the treatment liquid that drips into the pretreatment area.

[0012] A liquid distribution component, comprising a rotating base coaxially rotatably mounted on the air intake hood and at least one liquid distribution plate connected to the rotating base and arranged circumferentially along the rotating base, wherein a liquid storage component is provided on the liquid distribution plate;

[0013] A drainage component, connected to the liquid distribution component, is adapted to guide the treatment liquid in the collection tray into the liquid storage component;

[0014] A rotary drive component, connected to the rotary base to drive the rotary base and the liquid distribution plate to rotate; wherein:

[0015] When the liquid distribution plate rotates to the point of obstructing the air outlet, it closes the corresponding air outlet and discharges the treatment liquid through the liquid storage device, which then contacts the filter screen on the corresponding air outlet to form a liquid film on the filter screen. When the liquid distribution plate rotates to the point of opening the corresponding air outlet, the air outlet discharges exhaust gas, which then contacts the liquid film.

[0016] Furthermore, the fixed base is provided with a main air intake chamber and a main air intake channel for connecting the main air intake chamber and the inner cavity of the air intake hood. The exhaust gas enters the inner cavity of the air intake hood through the air intake port, then enters the corresponding main air intake chamber through the main air intake channel, and finally comes into contact with the liquid film at the filter screen on the corresponding air outlet before being discharged into the treatment tower.

[0017] Furthermore, in order to adjust the pretreatment path length according to the type of exhaust gas being treated, the energy-saving chemical exhaust gas environmental protection treatment device also includes an extension component, which includes:

[0018] Multiple vertically sliding seats are arranged inside the air intake hood and corresponding to the fixed seat. The sliding seats are coaxially arranged with the corresponding fixed seats. The sliding seats are provided with a connected secondary air intake chamber, a secondary air intake channel and a secondary air outlet channel. Multiple auxiliary filters are arranged vertically at intervals inside the secondary air intake chamber.

[0019] A baffle connected to the sliding seat, the sliding seat being adapted to be actuated to move vertically, thereby driving the baffle to move within the main air intake chamber, thereby opening or closing the main air intake passage through the baffle;

[0020] A sliding drive component, connected to the sliding seat to drive the sliding seat to move linearly in the vertical direction, wherein:

[0021] The fixed seat is provided with a side inlet communicating with the main air intake chamber, and the sliding seat has an upper position and a lower position;

[0022] When the sliding seat is moved to the upper position, the secondary air intake channel and the secondary air outlet channel are sealed against the outer wall of the fixed seat, the baffle opens the main air intake channel, and the exhaust gas in the air intake hood enters the main air intake channel and is discharged through the corresponding air outlet.

[0023] When the sliding seat is moved to the lower position, the secondary air intake channel communicates with the inner cavity of the air intake hood, the secondary air outlet channel communicates with the side inlet, the baffle moves to contact the fixed seat and close the main air intake channel, the exhaust gas in the air intake hood enters the secondary air intake channel, passes through the auxiliary filter, and then enters the main air intake chamber through the secondary air outlet channel and the side inlet, and is finally discharged through the corresponding air outlet.

[0024] Furthermore, in order to form liquid films at multiple locations, a flow divider is provided inside the mounting base, and the flow divider is located below the filter assembly;

[0025] When the sliding seat is in the lower position, the diverter plate is adapted to introduce part of the treatment liquid that has passed through the filter assembly into the auxiliary air outlet channel through the side inlet, and to contact the auxiliary filter in the auxiliary air inlet chamber, thereby forming a liquid film on the auxiliary filter.

[0026] Furthermore, to prevent the flow of exhaust gas from affecting the formation of the liquid film, the sliding drive component includes an interconnected annular guide rail and a sliding drive member. The sliding drive member is connected to the air intake hood, and the annular guide rail is connected to all the sliding seats. A sealing plate is rotatably arranged in the annular guide rail. Multiple sealing portions corresponding to the liquid distribution plate are arranged circumferentially on the sealing plate. The rotary drive component is connected to the sealing plate to drive the sealing plate to rotate, thereby driving the sealing portion to abut against the bottom wall of the sliding seat corresponding to the blocked air outlet to open or close the main air intake channel and the secondary air intake channel connecting to the inner cavity of the air intake hood.

[0027] The sealing plate is configured such that when the liquid distribution plate is moved to block one of the air outlets, the sealing part corresponding to the liquid distribution plate abuts against the sliding seat corresponding to the air outlet.

[0028] Furthermore, in order to improve the integrity of the liquid film formation on the filter screen, the liquid storage component includes a movable plate that is vertically slidably disposed on the liquid distribution plate and a liquid storage sponge connected to the movable plate, and the drainage component is adapted to pass the treatment liquid in the collection tray into the liquid storage sponge;

[0029] The air intake hood is provided with multiple extrusion plates corresponding to the air inlet. When the liquid distribution plate blocks the air outlet, the extrusion plate corresponding to the air outlet is adapted to contact the moving plate corresponding to the liquid distribution plate and cause extrusion, thereby driving the moving plate to move towards the air outlet. This causes the liquid storage sponge to move and then squeeze the filter screen at the corresponding air outlet, so that the treatment liquid in the liquid storage sponge contacts the filter screen to form a liquid film.

[0030] An elastic component for resetting the liquid distribution plate is provided between the movable plate and the corresponding liquid distribution plate.

[0031] Furthermore, the extrusion plate is provided with an inclined groove, and the movable plate is provided with an arc-shaped protrusion at one end adjacent to the extrusion plate for cooperating with the inclined groove;

[0032] The inclined groove has a high point and a low point. When the moving plate is moved to contact the extrusion plate, the arc-shaped protrusion first contacts the high point of the inclined groove. As the moving plate continues to move until the arc-shaped protrusion contacts the low point of the inclined groove, the arc-shaped protrusion continues to move towards the air outlet along the inclined angle of the inclined groove, thereby driving the moving plate to move.

[0033] Furthermore, the drainage component includes a water collection base and multiple diversion pipes corresponding to the liquid distribution plate. The water collection base is connected to the rotating base and is used to receive the treatment liquid in the collection tray. A flexible tube is provided between the diversion pipe and the moving plate, and the treatment liquid passes through the diversion pipe and the flexible tube and enters the liquid storage sponge through the moving plate.

[0034] Furthermore, to prevent the treatment liquid dripping onto the air intake hood from failing to contact the filter screen, an inclined portion is provided at the location of the air outlet on the air intake hood. The inclined portion is adapted to guide the treatment liquid dripping onto the air intake hood to the air outlet so that it can contact the corresponding filter screen.

[0035] By adopting the above technical solution, the present invention has the following beneficial effects:

[0036] 1. To ensure a stable and continuous formation of a complete liquid film on the filter screen, when the treated liquid falls through the holes in the bottom packing support plate into the pretreatment area, it enters the liquid tank and is collected by the collection tray. The treated liquid collected in the collection chamber on the collection tray is then guided into the liquid storage container in the distribution plate through the drainage component. After the rotation drive component is activated, it drives the distribution plate to rotate. During the rotation of the distribution plate, it blocks the air outlets along the rotation path one by one. The blocked air outlets cannot allow exhaust gas to pass through, thus preventing the continuous formation of a complete liquid film due to the continuous flow of exhaust gas at the air outlet. When the outlet is blocked, the liquid storage unit discharges the treatment liquid. The discharged treatment liquid comes into contact with the filter screen corresponding to the blocked outlet and forms a new liquid film. This process is called membrane replenishment. As the liquid distribution plate continues to rotate, the blocked outlets that have completed membrane replenishment are opened. The opened outlets can then discharge exhaust gas normally. During the discharge process, the exhaust gas can come into contact with the newly replenished liquid film, thereby achieving a better pre-filtration effect. When some outlets are blocked for membrane replenishment, the unblocked outlets can discharge gas normally. The membrane replenishment process is carried out alternately to ensure the efficiency of exhaust gas passage while also ensuring the quality of exhaust gas pre-filtration.

[0037] 2. When it is not necessary to extend the exhaust gas pretreatment path, the sliding seat is in the initial position (i.e., the upper position). At this time, the auxiliary air intake channel and the auxiliary air outlet channel on the sliding seat are abutted against the outer wall of the fixed seat, so that the exhaust gas can only enter the main air intake chamber through the main air intake channel and be discharged from the outlet after being filtered by the liquid film on the filter screen.

[0038] When it is necessary to extend the exhaust gas pretreatment path, the sliding drive component is activated to move the sliding seat downwards to the lower position. The baffle moves synchronously with the sliding seat. When the sliding seat moves to the lower position, the baffle abuts against the fixed seat to close the main intake channel. At this time, the auxiliary intake channel on the sliding seat at the lower position is opened, and the auxiliary exhaust channel is connected to the side inlet. The exhaust gas cannot enter the main intake chamber through the main intake channel, so it enters the auxiliary intake chamber through the auxiliary intake channel. In the auxiliary intake chamber, the exhaust gas passes through all the auxiliary filters for filtration, and then enters the main intake chamber through the auxiliary exhaust channel and the side inlet, and is finally discharged through the exhaust port. Under this setting, since the exhaust gas needs a longer pretreatment path, it is first introduced into the sliding seat to contact the auxiliary filters. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the processing tower of the present invention;

[0040] Figure 2 This is a schematic diagram of the internal structure of the processing tower of the present invention;

[0041] Figure 3 This is a schematic diagram of the overall structure of the pretreatment component of the present invention;

[0042] Figure 4 This is a schematic diagram of the internal structure of the air intake cover of the present invention. Figure 1 ;

[0043] Figure 5 This is a schematic diagram of the internal structure of the air intake cover of the present invention. Figure 2 ;

[0044] Figure 6 This is a schematic diagram of the liquid distribution component structure of the present invention;

[0045] Figure 7 This is a schematic diagram of the structure of the fixing seat of the present invention;

[0046] Figure 8 This is a schematic diagram of the internal structure of the fixing base of the present invention;

[0047] Figure 9 This is a schematic diagram of the internal structure of the air intake cover of the present invention. Figure 3 ;

[0048] Figure 10 For the present invention Figure 2 Enlarged view of point A in the middle;

[0049] Figure 11 This is a schematic diagram of the structure of the arc-shaped protrusion and the inclined groove of the present invention;

[0050] Figure 12 This is a schematic diagram showing the position of the sliding drive component of the present invention;

[0051] Figure 13 This is a schematic diagram of the sliding seat of the present invention located in the lower position;

[0052] Figure 14 This is a schematic diagram of the side inlet position of the present invention;

[0053] Figure 15 This is a schematic diagram showing the relationship between the sliding seat at the lower position and the air intake cover of the present invention;

[0054] Figure 16 This is a schematic diagram of the sliding drive component structure of the present invention;

[0055] Figure 17 This is a three-dimensional sectional view of the sliding seat of the present invention;

[0056] In the diagram: 1. Treatment tower; 11. Spray treatment unit;

[0057] 2. Air inlet hood; 21. Air inlet; 22. Air outlet; 23. Mounting base; 24. Filter screen; 25. Activated carbon filter screen; 26. Liquid outlet; 27. Main air inlet chamber; 28. Main air inlet channel; 29. ​​Inclined section;

[0058] 3. Collection tray; 31. Liquid tank; 32. Gas tank;

[0059] 4. Liquid distribution component; 41. Rotating base; 42. Liquid distribution plate; 43. Liquid storage component; 44. Moving plate; 45. Liquid storage sponge; 46. Squeezing plate; 48. Elastic component; 49. Inclined groove; 410. Arc-shaped protrusion;

[0060] 5. Drainage components; 51. Water collection base; 52. Diversion pipe; 53. Flexible hose;

[0061] 6. Rotary drive component; 61. Rotary motor; 62. Drive rod;

[0062] 7. Sliding seat; 71. Secondary intake chamber; 72. Secondary intake passage; 73. Secondary exhaust passage; 74. Auxiliary filter; 75. Baffle; 76. Side inlet; 77. Flow divider;

[0063] 8. Sliding drive component; 81. Circular guide rail; 82. Sliding drive element;

[0064] 9. Enclosure panel; 91. Enclosure section. Detailed Implementation

[0065] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0066] Example 1: As Figure 1-4 , Figure 8 As shown, an energy-saving chemical waste gas environmental protection treatment device includes:

[0067] Processing tower 1, which includes a main processing area and a preprocessing area;

[0068] Multiple spray treatment units 11 are arranged vertically at intervals in the main treatment area. Each spray treatment unit 11 includes a spray assembly for spraying treatment liquid and a packing assembly for promoting contact between treatment liquid and exhaust gas.

[0069] A pretreatment component is installed in the pretreatment area. The pretreatment component includes an air inlet hood 2, which has an air inlet 21 for the exhaust gas to enter the hood 2 and multiple air outlets 22 arranged circumferentially around the hood 2 to discharge the exhaust gas into the treatment tower 1. A fixing seat 23 is provided at each air outlet 22, and a filter screen assembly is provided on the fixing seat 23.

[0070] The filter assembly includes a filter screen 24 and an activated carbon filter screen 25. The activated carbon filter screen 25 is located below the filter screen 24. The treatment liquid dripping into the pretreatment area comes into contact with the filter screen 24 and forms a liquid film on the filter screen 24. When the exhaust gas passes through the outlet 22, it first comes into contact with the activated carbon filter screen and then with the liquid film.

[0071] Specifically, such as Figure 1-2 As shown, the spray assembly is located above the corresponding packing assembly. In the figure, only the packing support plate is shown, not the packing layer. The packing layer can be structured packing or loose packing, etc. The packing support plate has a porous structure. When the spray assembly sprays the treatment liquid onto the packing assembly, some of the treatment liquid forms a liquid film on the packing layer, which can enhance the contact between the treatment liquid and the exhaust gas. Some of the treatment liquid will fall from the holes of the packing support plate into the pretreatment area.

[0072] The filter screen 24 can be made of metal or plastic, and the activated carbon filter screen 25 can adopt a structure of an outer support filter screen and an inner activated carbon fiber felt.

[0073] A liquid outlet 26 is provided below the air inlet hood 2. The liquid outlet 26 is connected to the inner cavity of the air inlet hood 2. The exhaust gas enters the air inlet hood 2 from the air inlet 21 and is discharged from the air outlet 22. The treatment liquid enters the air inlet hood 2 from the air outlet 22 and is discharged from the liquid outlet 26 to the bottom of the treatment tower 1.

[0074] Furthermore, a drain pipe is installed at the bottom of the treatment tower 1 to discharge the waste liquid accumulated at the bottom of the treatment tower 1 and to introduce it into the waste liquid treatment system. A demister is installed at the top of the treatment tower 1 to remove the moisture from the filtered exhaust gas before discharge. The exhaust gas in the treatment tower 1 moves from bottom to top.

[0075] In this embodiment, the treatment liquid drips from the holes of the packing support plate into the pretreatment area. The exhaust gas enters the air intake hood 2 from the air inlet 21 and is then discharged into the treatment tower 1 from the air outlet 22. During the process of the exhaust gas passing through the air outlet 22, the exhaust gas first contacts the activated carbon filter 25 for the first filtration treatment, and then passes through the filter 24. Since some of the treatment liquid drips onto the air intake hood 2 and contacts the filter 24 when it enters the pretreatment area, the treatment liquid can form a liquid film on the filter 24. The exhaust gas contacts the liquid film when it passes through the filter 24 for the second filtration treatment. The treatment liquid that does not adhere to the filter 24 to form a liquid film is discharged to the bottom of the treatment tower 1 through the liquid outlet 26. This process uses the dripping treatment liquid to pretreat the exhaust gas, thereby reducing the waste of treatment liquid and improving the overall exhaust gas filtration effect.

[0076] After the exhaust gas is discharged from the outlet 22, it enters the treatment tower 1, first in the pretreatment area and then flows to the main treatment area, and finally flows out from the top of the treatment tower 1. During the process of flowing from the pretreatment area to the main treatment area, the exhaust gas passes through all the packing layers one by one and comes into contact with the liquid film formed on the packing layers to complete the main filtration steps.

[0077] like Figure 2-6 As shown, the preprocessing component also includes:

[0078] A collection tray 3 is set between the air inlet hood 2 and the lowest spray treatment unit 11. The collection tray 3 is connected to the treatment tower 1 and is used to collect the treatment liquid that drips onto the pretreatment area.

[0079] Liquid distribution component 4 includes a rotating base 41 coaxially rotatably mounted on the air intake hood 2 and at least one liquid distribution plate 42 connected to the rotating base 41 and arranged circumferentially along the rotating base 41. Liquid distribution plate 42 is provided with a liquid storage component 43.

[0080] Drainage component 5 is connected to liquid distribution component 4 to facilitate the flow of treatment liquid from collection tray 3 into liquid storage component 43;

[0081] Rotary drive component 6 is connected to the rotating base 41 to drive the rotating base 41 and the liquid distribution plate 42 to rotate; wherein:

[0082] When the liquid distribution plate 42 rotates to the point of obstructing the air outlet 22, it closes the corresponding air outlet 22 and discharges the treatment liquid through the liquid storage component 43, which then contacts the filter screen 24 on the corresponding air outlet 22, so that a liquid film is formed on the filter screen 24. When the liquid distribution plate 42 rotates to the point of opening the corresponding air outlet 22, the exhaust gas is discharged from the air outlet 22, so that the exhaust gas contacts the liquid film.

[0083] Specifically, such as Figure 10 As shown, the collection tray 3 includes a liquid tank 31 with an open top and a closed bottom, and an axially penetrating gas tank 32. The liquid tank 31 corresponds to the holes on the bottom packing support plate so that the treated liquid can better enter the liquid tank 31 when it falls from the holes into the pretreatment area. An axially penetrating collection cavity is provided in the center of the collection tray 3. The bottom of the liquid tank 31 is divided into inclined surfaces, with the lowest point of the inclined surface near the collection cavity. A connecting channel is provided between two adjacent liquid tanks 31 to connect the two liquid tanks. When the treated liquid is discharged through the holes and falls into the liquid tank 31, the treated liquid flows along the inclined surface and collects in the corresponding liquid tank 31 near the collection cavity. Then, it passes through the other liquid tanks 31 through the corresponding connecting channel and finally collects in the collection cavity to complete the unified collection of the treated liquid. The gas tank 32 allows the exhaust gas discharged from the gas outlet 22 to move upward to the treatment tower 1 to pass through the entire packing layer.

[0084] Furthermore, a barrier screen can be installed on the liquid tank 31. The barrier screen can filter the incoming treatment liquid to prevent impurities carried by the already filtered portion of the dripping treatment liquid from clogging the filter screen 24. The impurities intercepted by the barrier screen can be treated manually periodically or by setting up a backwashing system. This part is not shown in the figure and can be set up according to the type and situation of the actual exhaust gas being treated.

[0085] Specifically, such as Figure 4As shown, the rotary drive component 6 includes a rotary motor 61 and a drive rod 62. A control cavity is provided inside the air intake shroud 2. The control cavity is not connected to the inner cavity of the air intake shroud 2. The rotary motor 61 is installed in the control cavity. The drive rod 62 is rotatably installed on the air intake shroud 2. One end of the drive rod 62 is connected to the rotating base 41, and the other end of the drive rod 62 is connected to the output shaft of the rotary motor 61. The rotary motor 61 is used to control the rotation of the drive rod 62, thereby driving the rotating base 41 to rotate.

[0086] In this embodiment, to ensure a stable and continuous formation of a complete liquid film on the filter screen 24, the following settings are made: When the treatment liquid falls into the pretreatment area through the holes in the bottom packing support plate, it enters the liquid tank 31 and is uniformly received by the collection tray 3. The treatment liquid collected in the collection chamber on the collection tray 3 is then guided into the liquid storage container 43 in the liquid distribution plate 42 through the guide component 5. After the rotation drive component 6 is started, it drives the liquid distribution plate 42 to rotate. During the rotation of the liquid distribution plate 42, it blocks the air outlets 22 on the rotation path one by one. The blocked air outlets 22 cannot allow exhaust gas to pass through, thus preventing the air outlets 22 from failing to form a complete liquid film due to continuous exhaust gas flow. When the outlet 22 is blocked, the liquid storage unit 43 discharges the treatment liquid. The discharged treatment liquid comes into contact with the filter screen 24 corresponding to the blocked outlet 22 and forms a new liquid film. This process is called membrane replenishment. As the liquid distribution plate 42 continues to rotate, the blocked outlet 22 that has completed membrane replenishment is opened. The opened outlet 22 can discharge exhaust gas normally. During the discharge process, the exhaust gas can come into contact with the newly replenished liquid film, thereby obtaining a better pre-filtration effect. When some outlets 22 are blocked for membrane replenishment, the unblocked outlets 22 can discharge gas normally. The membrane replenishment work is carried out alternately to ensure the efficiency of exhaust gas passage and at the same time ensure the quality of exhaust gas pre-filtration.

[0087] like Figure 7-9 As shown, the fixed base 23 has a main air intake chamber 27 and a main air intake channel 28 for connecting the main air intake chamber 27 and the inner cavity of the air intake hood 2. The exhaust gas enters the inner cavity of the air intake hood 2 through the air intake port 21, then enters the corresponding main air intake chamber 27 through the main air intake channel 28, and finally comes into contact with the liquid film at the filter screen 24 on the corresponding air outlet 22 before being discharged into the treatment tower 1.

[0088] like Figure 5 , Figure 6 , Figure 11 As shown, the liquid storage component 43 includes a movable plate 44 vertically slidably disposed on the liquid distribution plate 42 and a liquid storage sponge 45 connected to the movable plate 44. The drainage component 5 is adapted to pass the treatment liquid in the collection tray 3 into the liquid storage sponge 45.

[0089] The air intake hood 2 is provided with multiple extrusion plates 46 corresponding to the air intake 21. When the liquid distribution plate 42 blocks the air outlet 22, the extrusion plate 46 corresponding to the air outlet 22 is adapted to contact the moving plate 44 corresponding to the liquid distribution plate 42 and cause extrusion, thereby driving the moving plate 44 to move towards the air outlet 22, thereby driving the liquid storage sponge 45 to move and cause extrusion to the filter screen 24 at the corresponding air outlet 22, so that the treatment liquid in the liquid storage sponge 45 contacts the filter screen 24 to form a liquid film.

[0090] An elastic component 48 for driving the liquid distribution plate 42 to reset is provided between the movable plate 44 and the corresponding liquid distribution plate 42.

[0091] Specifically, such as Figure 11 As shown, the elastic component 48 includes a telescopic rod and a return spring. The two ends of the telescopic rod are connected to the liquid distribution plate 42 and the moving plate 44, respectively. The return spring is sleeved on the telescopic rod, and the two ends of the return spring are connected to the liquid distribution plate 42 and the moving plate 44, respectively. When the moving plate 44 is moved by the squeezing plate 46, the return spring is stretched. When the moving plate 44 loses contact with the squeezing plate 46, the return spring returns to its natural state, thereby driving the moving plate 44 to return to its original position.

[0092] In this embodiment, the drainage component 5 introduces the treatment liquid into the storage sponge 45, which can temporarily store the treatment liquid. The treatment liquid discharged after the storage sponge 45 is squeezed can contact the filter screen 24 more evenly to ensure that a complete liquid film can be formed on the filter screen 24, avoiding dead corners.

[0093] When the liquid distribution plate 42 blocks part of the air outlet 22 for membrane replenishment, the moving plate 44 contacts the squeezing plate 46 corresponding to the blocked air outlet 22. The squeezing plate 46 drives the moving plate 44 to move downward. When the moving plate 44 moves, it drives the liquid storage sponge 45 to move synchronously, so that the liquid storage sponge 45 squeezes the filter screen 24 on the blocked air outlet 22. Under the squeezed state, the liquid storage sponge 45 discharges the temporarily stored treatment liquid inside and contacts the filter screen 24, thereby forming a liquid film to complete the membrane replenishment. When the liquid distribution plate 42 rotates to no longer block the air outlet 22, the moving plate 44 loses contact with the squeezing plate 46. The squeezing plate 46 is reset by the elastic component 48, and the liquid storage sponge 45 is reset synchronously. When the liquid storage sponge 45 returns from the squeezed state to the natural state, the drainage component 5 continues to replenish the treatment liquid into the unsaturated liquid storage sponge 45 for the next membrane replenishment.

[0094] like Figure 11 As shown, the extrusion plate 46 is provided with an inclined groove 49, and the moving plate 44 is provided with an arc-shaped protrusion 410 for cooperating with the inclined groove 49 on one end adjacent to the extrusion plate 46.

[0095] The inclined groove 49 has a high point and a low point. When the moving plate 44 is moved to contact the extrusion plate 46, the arc-shaped protrusion 410 first contacts the high point of the inclined groove 49. As the moving plate 44 continues to move until the arc-shaped protrusion 410 contacts the low point of the inclined groove 49, the arc-shaped protrusion 410 continues to move towards the position closer to the air outlet 22 along the inclined angle of the inclined groove 49, thereby driving the moving plate 44 to move.

[0096] In this embodiment, when the liquid distribution plate 42 is rotated to block the air outlet 22, the moving plate 44 enters the inclined groove 49 on the extrusion plate 46 corresponding to the blocked air outlet 22, and contacts the high point of the inclined groove 49 through the arc-shaped protrusion 410. As the liquid distribution plate 42 continues to rotate, the arc-shaped protrusion 410 continues to move to the low point of the inclined groove 49. During this process, the arc-shaped protrusion 410 moves along the inclined angle of the inclined groove 49, thereby driving the moving plate 44 to move synchronously, thereby achieving the effect of the moving plate 44 moving downward, so that the liquid storage sponge 45 can move downward and squeeze with the corresponding filter screen 24 to complete the membrane filling work.

[0097] like Figure 3 As shown, the drainage component 5 includes a water collection base 51 and multiple diversion pipes 52 corresponding to the liquid distribution plate 42. The water collection base 51 is connected to the rotating base 41 and is used to receive the treatment liquid in the collection tray 3. A hose 53 is provided between the diversion pipe 52 and the moving plate 44. The treatment liquid passes through the diversion pipe 52 and the hose 53 and enters the liquid storage sponge 45 through the moving plate 44.

[0098] In this embodiment, the water collection base 51 is connected to the rotating base 41 to ensure synchronous rotation. The treatment liquid collected in the collection tray 3 is uniformly fed into the water collection base 51. The treatment liquid in the water collection base 51 is fed into the diversion pipe 52. The diversion pipe 52 is connected to the moving plate 44 through the hose 53 to ensure that it remains connected to the diversion pipe 52 during the movement of the moving plate 44. The treatment liquid in the diversion pipe 52 can be fed into the liquid storage sponge 45 through the hose 53 for use in subsequent membrane replenishment work.

[0099] like Figure 3 As shown, an inclined part 29 is provided at the position of the air outlet 22 on the air intake hood 2. The inclined part 29 is adapted to guide the treatment liquid falling on the air intake hood 2 to the air outlet 22 to contact the corresponding filter screen 24.

[0100] In this embodiment, during the process of the liquid storage sponge 45 squeezing the corresponding filter screen 24 to discharge the treatment liquid for membrane repair, some of the treatment liquid fails to accurately contact the filter screen 24 and instead flows onto the top of the air intake hood 2. At this time, this portion of the treatment liquid can flow to the filter screen 24 through the inclined part 29, which can also achieve the effect of membrane repair.

[0101] Example 2: Figure 12-15 , Figure 17 As shown, this embodiment further includes the following structure based on Embodiment 1: The energy-saving chemical waste gas environmental protection treatment device also includes an extension component, which includes:

[0102] Multiple vertically sliding seats 7 are installed inside the air intake hood 2 and are corresponding to the fixed seat 23. The sliding seats 7 are coaxially arranged with the corresponding fixed seat 23. The sliding seats 7 are provided with a connected auxiliary air intake chamber 71, an auxiliary air intake channel 72 and an auxiliary air outlet channel 73. Multiple auxiliary filters 74 are arranged vertically at intervals inside the auxiliary air intake chamber 71.

[0103] The baffle 75 is connected to the sliding seat 7. The sliding seat 7 is adapted to be actuated to move vertically, thereby driving the baffle 75 to move within the main air intake chamber 27, thereby opening or closing the main air intake passage 28 through the baffle 75.

[0104] The sliding drive component 8 is connected to the sliding seat 7 to drive the sliding seat 7 to move linearly in the vertical direction, wherein:

[0105] The fixed seat 23 is provided with a side inlet 76 that communicates with the main air intake chamber 27, and the sliding seat 7 has an upper position and a lower position;

[0106] When the sliding seat 7 is moved to the upper position, the auxiliary air intake passage 72 and the auxiliary air outlet passage 73 are sealed against the outer wall of the fixed seat 23, and the baffle 75 opens the main air intake passage 28. The exhaust gas in the air intake hood 2 enters the main air intake passage 28 and is discharged through the corresponding air outlet 22.

[0107] When the sliding seat 7 is moved to the lower position, the secondary air intake passage 72 communicates with the inner cavity of the air intake hood 2, the secondary air outlet passage 73 communicates with the side inlet 76, and the baffle 75 moves to contact the fixed seat 23 and close the main air intake passage 28. The exhaust gas in the air intake hood 2 enters the secondary air intake passage 72, passes through the auxiliary filter 74, and then enters the main air intake chamber 27 through the secondary air outlet passage 73 and the side inlet 76, and is finally discharged through the corresponding air outlet 22.

[0108] In this embodiment, depending on the type of exhaust gas to be treated, an extension component is provided to extend the path of the exhaust gas pretreatment, thereby further improving the exhaust gas treatment effect.

[0109] When there is no need to extend the exhaust gas pretreatment path, the sliding seat 7 is in the initial position (i.e., the upper position). At this time, the auxiliary air intake channel 72 and the auxiliary air outlet channel 73 on the sliding seat 7 are both against the outer wall of the fixed seat 23, so that the exhaust gas can only enter the main air intake chamber 27 through the main air intake channel 28, and be discharged from the outlet 22 after being filtered by the liquid film on the filter screen 24.

[0110] When it is necessary to extend the exhaust gas pretreatment path, the sliding drive component 8 is activated to move the sliding seat 7 downward to the lower position. The baffle 75 moves synchronously with the sliding seat 7. When the sliding seat 7 moves to the lower position, the baffle 75 abuts against the fixed seat 23 to close the main intake channel 28. At this time, the auxiliary intake channel 72 on the sliding seat 7 at the lower position is opened, and the auxiliary exhaust channel 73 is connected to the side inlet 76. The exhaust gas cannot enter the main intake chamber 27 through the main intake channel 28. Therefore, it enters the auxiliary intake chamber 71 through the auxiliary intake channel 72. In the auxiliary intake chamber 71, the exhaust gas passes through all the auxiliary filters 74 for filtration, and then enters the main intake chamber 27 through the auxiliary exhaust channel 73 and the side inlet 76. Finally, it is discharged through the exhaust port 22. Under this setting, since the exhaust gas needs a longer pretreatment path, it is introduced into the sliding seat 7 to contact the auxiliary filters 74 first.

[0111] Furthermore, the auxiliary filter 74 can be a filter made of ordinary metal or plastic, or it can be an activated carbon filter 25. Of course, other commonly used exhaust gas filtration components can also be installed in the secondary air intake chamber 71, which can achieve a certain filtration effect on the exhaust gas when it passes through the secondary air intake chamber 71.

[0112] like Figure 13 As shown, a flow divider 77 is provided inside the mounting base 23, and the flow divider 77 is located below the filter assembly;

[0113] When the sliding seat 7 is in the lower position, the diverter 77 is adapted to introduce part of the treatment liquid that has passed through the filter screen 24 assembly into the auxiliary air outlet channel 73 through the side inlet 76, and contact the auxiliary filter screen 74 in the auxiliary air inlet chamber 71, thereby forming a liquid film on the auxiliary filter screen 74.

[0114] In this embodiment, in order to further improve the exhaust gas pretreatment effect of the auxiliary filter 74 in the secondary intake chamber 71, it is necessary to enable the formation of a liquid film on the auxiliary filter 74. Therefore, the following settings are made:

[0115] When the liquid storage sponge 45 is squeezed between itself and the filter screen 24 to discharge the internal treatment liquid to contact the filter screen 24, some of the treatment liquid that passes through the filter screen 24 contacts the diverter plate 77 and is guided by the diverter plate 77 to the side inlet 76. The treatment liquid enters the auxiliary air intake chamber 71 through the side inlet 76 and the auxiliary air outlet channel 73, and is finally discharged to the outside of the sliding seat 7 through the auxiliary air intake channel 72. During the process of the treatment liquid passing through the auxiliary air intake chamber 71, it contacts the auxiliary filter screen 74 and forms a liquid film on the auxiliary filter screen 74. After the film replenishment work is completed, when the exhaust gas normally passes through the auxiliary air intake chamber 71 to the main air intake chamber 27 and is finally discharged through the air outlet 22, the exhaust gas will first contact the liquid film on the auxiliary filter screen 74 in the auxiliary air intake chamber 71, and then contact the liquid film on the filter screen 24, thereby increasing the contact area and contact time between the exhaust gas and the liquid film.

[0116] It should be noted that some of the treatment fluid that does not come into contact with the diverter plate 77 will accumulate in the main intake chamber 27 during the time the main intake channel 28 is closed. When the liquid level rises to a certain height, this part of the treatment fluid will also enter the auxiliary intake chamber 71 through the side inlet 76 to perform membrane replenishment work on the auxiliary filter 74, or it will be discharged from the main intake channel 28 after the baffle 75 is released from blocking the main intake channel 28.

[0117] Example 3: Figure 16 As shown, this embodiment further includes the following structure based on embodiment one: the sliding drive component 8 includes an annular guide rail 81 and a sliding drive component 82 connected to each other. The sliding drive component 82 is connected to the air intake hood 2. The annular guide rail 81 is connected to all the sliding seats 7. A sealing plate 9 is rotatably arranged in the annular guide rail 81. Multiple sealing parts 91 corresponding to the liquid distribution plate 42 are arranged circumferentially on the sealing plate 9. The rotation drive component 6 is connected to the sealing plate 9 to drive the sealing plate 9 to rotate, thereby driving the sealing part 91 to abut against the bottom wall of the sliding seat 7 corresponding to the blocked air outlet 22 to open or close the main air intake channel 28 and the secondary air intake channel 72 connecting to the inner cavity of the air intake hood 2.

[0118] The sealing plate 9 is configured such that when the liquid distribution plate 42 is moved to block one of the air outlets 22, the sealing part 91 corresponding to the liquid distribution plate 42 abuts against the sliding seat 7 corresponding to the air outlet 22.

[0119] Specifically, the sliding drive component 82 is a drive cylinder, which can be a linear drive component such as an electric cylinder or a pneumatic cylinder. The sliding drive component 82 is installed in the control cavity. The telescopic end of the sliding drive component 82 is connected to the annular guide rail 81. When it is necessary to control all movable seats to make position adjustments at the upper and lower positions, the sliding drive component 82 is started to drive the annular guide rail 81 to move.

[0120] Specifically, such as Figure 16 As shown, the sealing plate 9 is coaxially arranged with the drive rod 62. The sealing plate 9 is slidably arranged on the drive rod 62. When the drive rod 62 is rotated, the sealing plate 9 can rotate synchronously in the annular guide rail 81. When the sliding seat 7 switches between the upper and lower positions, the annular guide rail 81 and the sealing plate 9 move vertically synchronously. During the vertical movement, the sealing plate 9 can also be driven to rotate by the drive rod 62.

[0121] In this embodiment, to further reduce the flow of exhaust gas in the secondary air intake channel 72 or the main air intake channel 28 corresponding to the blocked air outlet 22 during the membrane repair process, a sealing plate 9 is provided. When the corresponding liquid distribution plate 42 blocks the air outlet 22, the sealing part 91 on the sealing plate 9 will contact the bottom of the sliding seat 7 corresponding to the air outlet 22, thereby completely sealing the secondary air intake channel 72 and the main air intake channel 28. This reduces the amount of exhaust gas that continues to enter the secondary air intake channel 72 and the main air intake channel 28, which would cause the exhaust gas flow to intensify and affect the membrane repair effect. The specific working principle is as follows:

[0122] When the drive rod 62 is rotated, it synchronously drives the liquid distribution plate 42 and the sealing plate 9 to rotate. During the rotation, the liquid distribution plate 42 blocks the air outlet 22 to perform the film replenishment work. While the film replenishment work is being carried out, the sealing part 91 on the sealing plate 9 corresponding to the liquid distribution plate 42 contacts the bottom of the sliding seat 7 corresponding to the blocked air outlet 22 to prevent more exhaust gas from entering the main air intake channel 28 or the secondary air intake channel 72, thereby reducing the interference of exhaust gas flow on the film replenishment. After the film replenishment work is completed, the liquid distribution plate 42 opens the air outlet 22, and the sealing part 91 loses contact with the bottom of the corresponding sliding seat 7 to open the main air intake channel 28 or the secondary air intake channel 72.

[0123] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving environmental protection device for chemical waste gas treatment, characterized in that... ,include: A processing tower, comprising a main processing area and a preprocessing area; Multiple sets of spray treatment units are arranged vertically at intervals in the main treatment area. Each spray treatment unit includes a spray assembly for spraying out treatment liquid and a packing assembly for promoting contact between treatment liquid and exhaust gas. A pretreatment component is disposed in the pretreatment area. The pretreatment component includes an air inlet hood, which has an air inlet for the exhaust gas to enter the hood and multiple air outlets arranged circumferentially around the air inlet for the exhaust gas to be discharged into the treatment tower. A fixing seat is provided at each air outlet, and a filter assembly is provided on the fixing seat. The filter assembly includes a filter screen and an activated carbon filter screen. The activated carbon filter screen is located below the filter screen. The treatment liquid dripping into the pretreatment area comes into contact with the filter screen and forms a liquid film on the filter screen. When the exhaust gas passes through the exhaust port, it first comes into contact with the activated carbon filter screen and then with the liquid film. The preprocessing component also includes: A collection tray is disposed between the air inlet hood and the lowest spray treatment unit. The collection tray is connected to the treatment tower and is used to collect the treatment liquid that drips into the pretreatment area. A liquid distribution component, comprising a rotating base coaxially rotatably mounted on the air intake hood and at least one liquid distribution plate connected to the rotating base and arranged circumferentially along the rotating base, wherein a liquid storage component is provided on the liquid distribution plate; A drainage component, connected to the liquid distribution component, is adapted to guide the treatment liquid in the collection tray into the liquid storage component; A rotary drive component, connected to the rotary base to drive the rotary base and the liquid distribution plate to rotate; wherein: When the liquid distribution plate rotates to the point of obstructing the air outlet, it closes the corresponding air outlet and discharges the treatment liquid through the liquid storage device, which then contacts the filter screen on the corresponding air outlet to form a liquid film on the filter screen. When the liquid distribution plate rotates to the point of opening the corresponding air outlet, the air outlet discharges exhaust gas, which then contacts the liquid film. The liquid storage component includes a movable plate that is vertically slidably disposed on the liquid distribution plate and a liquid storage sponge connected to the movable plate. The drainage component is adapted to pass the treatment liquid in the collection tray into the liquid storage sponge. The air intake hood is provided with a plurality of extrusion plates corresponding to the air inlet. When the liquid distribution plate blocks the air outlet, the extrusion plate corresponding to the air outlet is adapted to contact the moving plate corresponding to the liquid distribution plate and cause extrusion, thereby driving the moving plate to move toward the air outlet, thereby driving the liquid storage sponge to move and cause extrusion with the filter screen at the corresponding air outlet, so that the treatment liquid in the liquid storage sponge contacts the filter screen to form a liquid film. An elastic component for resetting the liquid distribution plate is provided between the movable plate and the corresponding liquid distribution plate.

2. The energy-saving chemical waste gas environmental protection treatment device according to claim 1, characterized in that: The fixed base has a main air intake chamber and a main air intake channel for connecting the main air intake chamber and the inner cavity of the air intake hood. The exhaust gas enters the inner cavity of the air intake hood through the air intake port, then enters the corresponding main air intake chamber through the main air intake channel, and finally comes into contact with the liquid film at the filter screen on the corresponding air outlet before being discharged into the treatment tower.

3. The energy-saving chemical waste gas environmental protection treatment device according to claim 2, characterized in that: It also includes an extension component, the extension component comprising: Multiple vertically sliding seats are arranged inside the air intake hood and corresponding to the fixed seat. The sliding seats are coaxially arranged with the corresponding fixed seats. The sliding seats are provided with a connected secondary air intake chamber, a secondary air intake channel and a secondary air outlet channel. Multiple auxiliary filters are arranged vertically at intervals inside the secondary air intake chamber. A baffle connected to the sliding seat, the sliding seat being adapted to be actuated to move vertically, thereby driving the baffle to move within the main air intake chamber, thereby opening or closing the main air intake passage through the baffle; A sliding drive component, connected to the sliding seat to drive the sliding seat to move linearly in the vertical direction, wherein: The fixed seat is provided with a side inlet communicating with the main air intake chamber, and the sliding seat has an upper position and a lower position; When the sliding seat is moved to the upper position, the secondary air intake channel and the secondary air outlet channel are sealed against the outer wall of the fixed seat, the baffle opens the main air intake channel, and the exhaust gas in the air intake hood enters the main air intake channel and is discharged through the corresponding air outlet. When the sliding seat is moved to the lower position, the secondary air intake channel communicates with the inner cavity of the air intake hood, the secondary air outlet channel communicates with the side inlet, the baffle moves to contact the fixed seat and close the main air intake channel, the exhaust gas in the air intake hood enters the secondary air intake channel, passes through the auxiliary filter, and then enters the main air intake chamber through the secondary air outlet channel and the side inlet, and is finally discharged through the corresponding air outlet.

4. The energy-saving chemical waste gas environmental protection treatment device according to claim 3, characterized in that: A flow divider is provided inside the mounting base, and the flow divider is located below the filter assembly; When the sliding seat is in the lower position, the diverter plate is adapted to introduce part of the treatment liquid that has passed through the filter assembly into the auxiliary air outlet channel through the side inlet, and to contact the auxiliary filter in the auxiliary air inlet chamber, thereby forming a liquid film on the auxiliary filter.

5. The energy-saving chemical waste gas environmental protection treatment device according to claim 3 or 4, characterized in that: The sliding drive component includes an interconnected annular guide rail and a sliding drive member. The sliding drive member is connected to the air intake hood, and the annular guide rail is connected to all the sliding seats. A sealing plate is rotatably arranged in the annular guide rail. The sealing plate has a plurality of sealing parts corresponding to the liquid distribution plate arranged at intervals along the circumference. The rotary drive component is connected to the sealing plate to drive the sealing plate to rotate, thereby driving the sealing part to abut against the bottom wall of the sliding seat corresponding to the blocked air outlet to open or close the main air intake channel and the secondary air intake channel connecting to the inner cavity of the air intake hood. The sealing plate is configured such that when the liquid distribution plate is moved to block one of the air outlets, the sealing part corresponding to the liquid distribution plate abuts against the sliding seat corresponding to the air outlet.

6. The energy-saving chemical waste gas environmental protection treatment device according to claim 1, characterized in that: The extrusion plate is provided with an inclined groove, and the moving plate is provided with an arc-shaped protrusion at one end adjacent to the extrusion plate for cooperating with the inclined groove; The inclined groove has a high point and a low point. When the moving plate is moved to contact the extrusion plate, the arc-shaped protrusion first contacts the high point of the inclined groove. As the moving plate continues to move until the arc-shaped protrusion contacts the low point of the inclined groove, the arc-shaped protrusion continues to move towards the air outlet along the inclined angle of the inclined groove, thereby driving the moving plate to move.

7. The energy-saving chemical waste gas environmental protection treatment device according to claim 1, characterized in that: The drainage component includes a water collection base and multiple diversion pipes corresponding to the liquid distribution plate. The water collection base is connected to the rotating base and is used to receive the treatment liquid in the collection tray. A flexible tube is provided between the diversion pipe and the moving plate. The treatment liquid passes through the diversion pipe and the flexible tube, passes through the moving plate, and enters the liquid storage sponge.

8. The energy-saving chemical waste gas environmental protection treatment device according to claim 1 or 3, characterized in that: An inclined portion is provided at the location of the air outlet on the air inlet hood. The inclined portion is adapted to guide the treatment liquid falling on the air inlet hood to the air outlet and contact the corresponding filter screen.

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