Waste alkali liquid treatment device and method

Abstract

This invention relates to the field of wastewater treatment technology, specifically disclosing a waste alkali liquid treatment device and method. Two conveyor chains rotate on the separation zone. The separation plate has an upper inclined surface and a lower inclined surface. Multiple base frames are spaced apart between the two conveyor chains. An inner guide rail and an outer guide rail are provided on the tank body. A scraper, cooperating with the separation plate, is slidably mounted on the base frame via an elastic element. The scraper has filter holes. A housing is located on both sides of the scraper on the base frame. Multiple air outlets are located along the length of the lower end of the housing. A sliding plate, cooperating with the inner guide rail, is slidably mounted inside the housing via an elastic element. A partition is located inside the housing, and an air cavity is formed between the partition and the sliding plate. Two impurity removal components are located on both sides of the scraper. This invention is advantageous because when the scraper scrapes the scum on the liquid surface in the separation zone to the collection zone, it does not push the water in the separation zone into the collection zone, and it facilitates smooth and efficient scum scraping.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a device and method for treating waste alkali liquid. Background Art

[0002] In the pulping process of the paper industry, especially when alkaline chemicals such as sodium hydroxide and calcium hydroxide are used for cooking, wastewater containing high concentrations of alkaline substances will be produced. Paper mill wastewater treatment is crucial to environmental protection because untreated wastewater, if discharged directly, will cause serious pollution to water bodies and affect aquatic ecosystems and human health.

[0003] A Chinese patent with announcement number CN116119765B discloses a vertical dissolved air flotation machine, comprising a machine body, a slag discharge channel and an air flotation tank, wherein the machine body is rotatably mounted between the inner walls on opposite sides above the air flotation tank, two transmission shafts are fixedly mounted on the outer surfaces of both ends of the two transmission shafts, chains are sleeved on the outer surfaces of the two sprockets at the same end of the two transmission shafts, and multiple scraper plates are evenly fixedly mounted on the outer surfaces of the two chains, a C-shaped plate and two fixed plates are fixedly mounted on the inner wall of the machine body near one end of the slag discharge channel, a water storage cavity with a central opening is formed between the C-shaped plate and one of the fixed plates, and guide plates for diverting water to the water storage cavity are obliquely fixedly mounted on the top ends of the two fixed plates, two chutes are penetrated through the outer surfaces of the opposite sides of the machine body near the slag discharge channel, two sliders are slidably mounted on the inner walls of the two chutes, a conducting pipe is fixedly mounted between the two sliders, and a plurality of spray heads connected to the interior of the conducting pipe are evenly fixedly mounted on the lower surface of the conducting pipe.

[0004] During the implementation of the above technical solution, when the scraper plate pushes the scum through the top of the C-shaped plate to the top of the drain belt, some of the untreated wastewater in the flotation tank will also be pushed to the top of the drain belt, thereby causing water waste; when the scraper plate moves below the spray head, multiple spray heads flush the scum adhered to the surface of the scraper plate, which causes the flushed water to be contaminated again, thereby reducing the wastewater treatment efficiency. Summary of the invention

[0005] The present invention provides a waste alkali liquid treatment device and method, aiming to solve the problem that when the scraper plate in the above technical solution pushes the scum through the top of the C-shaped plate to the top of the drain belt, part of the wastewater in the flotation tank that has not been completely treated will be pushed to the top of the drain belt, thereby causing water waste; when the scraper plate moves below the spray head, multiple spray heads rinse the scum adhered to the surface of the scraper plate, which makes the rinsed water contaminated again, thereby reducing the treatment efficiency of the wastewater.

[0006] A waste alkali liquid treatment device comprises a tank body and a reaction zone, an air flotation contact zone, a separation zone, a separation plate, a collection zone and a clean water zone arranged in sequence in the tank body, two conveying chains are rotatably arranged on the separation zone, the separation plate has an upper inclined surface and a lower inclined surface, a plurality of base frames are arranged between the two conveying chains, an inner guide rail and an outer guide rail are arranged on the tank body, a scraper matching with the separation plate is slidably arranged on the base frame through an elastic member, the scraper has filter holes, and the two ends of the scraper along the length direction are respectively in contact with the inner wall of the tank body, a shell is respectively arranged on both sides of the scraper on the base frame, a plurality of air outlets are arranged at the lower end of the shell along the length direction, a slide plate matching with the inner guide rail is slidably arranged in the shell through an elastic member, a partition is arranged in the shell, an air cavity is arranged between the partition and the slide plate, and a plurality of air outlets are arranged at the lower end of the shell along the length direction. A sliding rod cooperating with the outer guide rail is provided through the sliding of elastic part 2, and a debris removing part is provided at the bottom of the sliding rod through the sliding of elastic part 3. There are two debris removing parts and they are located on both sides of the scraper. When the conveying chain rotates and the scraper is separated from the stopper of the lower inclined surface, the debris removing part can scrape the waste residue on the surface of the scraper to the collection area, and then the air cavity is compressed so that the gas in the air cavity can blow away the residue on the surface of the scraper through the air outlet; with the cooperation of the slide plate and the inner guide rail and the cooperation of the sliding rod and the outer guide rail, after the debris removing part scrapes off the scum on the surface of the scraper, the gas in the air cavity can blow away the residue on the surface of the scraper through the air outlet, which is conducive to the smooth and efficient scraping of the scum, and the scraper will not push the water in the separation area into the collection area when scraping the scum on the liquid surface of the separation area into the collection area.

[0007] Preferably, the inner guide rail comprises inner arc portion 1, inner horizontal portion 1, inner arc portion 2, inner horizontal portion 2 and inner arc portion 3 which are connected in sequence, and the slide plate is provided with a rod 1 which abuts against the inner circumferential surface of the inner guide rail.

[0008] Preferably, there is a gap between the inner arc portion 1 and the inner arc portion 3, the radius of the inner arc portion 1 is consistent with that of the inner arc portion 2 and is smaller than that of the inner arc portion 3, and with the cooperation of the slide plate and the inner guide rail, the gas in the air cavity can blow away the residue on the scraper surface through the air outlet, so that the scraper can scrape the residue efficiently.

[0009] Preferably, the outer guide rail comprises an outer arcuate portion 1, an outer horizontal portion 1, an outer arcuate portion 2, an outer horizontal portion 2 and an outer arcuate portion 3 which are connected in sequence, and the end of the sliding rod away from the debris removing component has a rod 3 which abuts against the inner circumference of the outer guide rail.

[0010] Preferably, there is a gap between the outer arc portion 1 and the outer arc portion 3, the radius of the outer arc portion 1 is consistent with that of the outer arc portion 2 and is smaller than that of the outer arc portion 3. With the cooperation of the sliding rod and the outer guide rail, the debris removal component can scrape the waste residue on the scraper surface into the collection area, so that the scraper can remain clean before contacting the scum each time.

[0011] Preferably, a one-way valve 1 is provided on the partition, and a one-way valve 2 connected to the air cavity is provided on the shell. When the air cavity is squeezed by the slide plate, the one-way valve 1 opens and the one-way valve 2 closes. The cooperation between the one-way valve 1 and the one-way valve 2 is conducive to the gas in the air cavity being blown smoothly to the scraper surface.

[0012] Preferably, the outer side of the lower end of the base frame has a matching surface for the debris removing member to slide toward the side of the scraper.

[0013] Preferably, the air outlet is arranged obliquely and faces the scraper, so that the gas in the air cavity can blow the scum on the scraper surface and the filter holes into the collection area.

[0014] A treatment method for a waste alkali liquid treatment device comprises the following steps: S1: controlling the conveying chain to rotate, the scraper first stops with the upper inclined surface and pushes the scum in the separation area to move to the lower inclined surface, the scraper slides into the base frame, and the water mixed in the scum flows back from the filter hole to the separation area; S2: when the scraper is separated from the lower inclined surface, the scraper is reset, and the impurity removal part slides rapidly along the side of the scraper to scrape the waste scum on the scraper surface to the collection area; S3: then two slide plates compress the corresponding air cavity in turn, so that the gas in the air cavity can blow off the scraper surface and the residue in the filter hole through the air outlet; through the above steps, the scraper can scrape the scum on the liquid surface of the separation area into the collection area well, and the scraper will not push the water in the separation area into the collection area, and the scraper can keep a clean state before contacting the scum each time, so as to facilitate the smooth and efficient scraping of the scum.

[0015] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: when the scraper is separated from the lower inclined surface, the sliding rod located in front of the scraper is first separated from the outer arc-shaped part along the rotation direction of the conveying chain, and the debris removal piece on the sliding rod can quickly slide along the side of the scraper, and then the waste residue on the surface of the scraper corresponding to the debris removal piece is scraped into the collection area. Then, along the rotation direction of the conveying chain, the rod 1 located in front of the scraper is separated from the inner arc-shaped part, and the slide plate on the rod 1 quickly squeezes the air cavity corresponding to it, so that the gas in the air cavity can be quickly blown toward the scraper through the multiple air outlets corresponding to it, and the waste residue remaining on the surface of the scraper corresponding to the air cavity is blown into the collection area. At the same time, the waste residue in the filter hole can also be blown into the collection area.

[0016] Subsequently, along the rotation direction of the conveying chain, the sliding rod located behind the scraper disengages from the stopper of the outer arc-shaped portion. At this time, the debris removing part on the sliding rod can slide quickly along the side of the scraper, and then scrape the waste residue on the surface of the scraper corresponding to the debris removing part into the collection area. Immediately afterwards, along the rotation direction of the conveying chain, the rod 1 located behind the scraper disengages from the stopper of the inner arc-shaped portion. The slide plate on the rod 1 quickly squeezes the air cavity corresponding to it, so that the gas in the air cavity can be quickly blown to the scraper through the multiple air outlets corresponding to it, and the waste residue remaining on the surface of the scraper corresponding to the air cavity is blown into the collection area. At the same time, the waste residue in the filter hole can also be blown into the collection area; thereby, the scraper can maintain a clean state before each contact with the scum, so as to facilitate the smooth and efficient scraping of the scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 Schematic diagram of the upper inclined surface and the lower inclined surface on the separation plate of the present invention.

[0019] Figure 3 It is a cross-sectional view of the pool body of the present invention.

[0020] Figure 4 It is a schematic diagram of the coordination of the conveyor chain and the base frame of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the inner guide rail and the outer guide rail of the present invention.

[0022] Figure 6 It is a schematic diagram of the structure on the base frame of the present invention.

[0023] Figure 7 It is a cross-sectional view of the base frame of the present invention.

[0024] Figure 8 The figure is a schematic diagram of the cooperation of the slide plate, the scraper, the debris removal member and the slide rod of the present invention.

[0025] Fig. 9 It is an exploded view of the base frame and the shell of the present invention.

[0026] Reference numerals: 10, tank body; 11, reaction zone; 12, air flotation contact zone; 13, separation zone; 14, separation plate; 141, upper slope; 142, lower slope; 15, collection zone; 16, clean water zone; 17, shaft; 18, motor; 20, conveyor chain; 30, base frame; 301, matching surface; 31, scraper; 310, filter hole; 311, elastic member 1; 32, housing; 321, air outlet; 322, one-way valve 2; 33, slide plate; 331, elastic member 5; 332 , rod one; 333, rod two; 34, partition; 341, one-way valve one; 35, sliding rod; 351, elastic member two; 352, rod three; 36, removing sundries; 361, elastic member three; 40, inner guide rail; 41, inner arc-shaped portion one; 42, inner horizontal portion one; 43, inner arc-shaped portion two; 44, inner horizontal portion two; 45, inner arc-shaped portion three; 50, outer guide rail; 51, outer arc-shaped portion one; 52, outer horizontal portion one; 53, outer arc-shaped portion two; 54, outer horizontal portion two; 55, outer arc-shaped portion three. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] like Figure 1-Figure 3 As shown, a waste alkali liquid treatment device includes a tank body 10 and a reaction zone 11, an air flotation contact zone 12, a separation zone 13, a separation plate 14, a collection zone 15 and a clean water zone 16 which are sequentially arranged in the tank body 10. Two annular conveying chains 20 are rotatably arranged above the separation zone 13. The two conveying chains 20 are located in the tank body 10. The two conveying chains 20 are connected by two shafts 17. A motor 18 for driving the conveying chains 20 to rotate is installed on the tank body 10. The separation plate 14 has an upper inclined surface 141 and a lower inclined surface 142. The connection between the upper inclined surface 141 and the lower inclined surface 142 is located between the two shafts 17. A plurality of base frames 30 are spaced between the two conveying chains 20. The base frames 30 are fixedly connected to the two conveying chains 20 at both ends along the length direction thereof.

[0029] like Figure 2-Figure 9As shown, a scraper 31 cooperating with the separation plate 14 is slidably provided on the base frame 30 through an elastic member 311, the elastic member 311 is specifically a first spring, and a filter hole 310 is provided on the scraper 31, and the scraper 31 is respectively in contact with the inner wall of the pool body 10 at both ends along its length direction, and a shell 32 is respectively provided on the base frame 30 on both sides of the scraper 31, and a plurality of air outlets 321 are provided at the lower end of the shell 32 along its length direction, and the air outlets 321 are inclined and face the scraper 31, and a slide plate 33 is slidably provided in the shell 32 through an elastic member 331, and the elastic member 331 is specifically a fifth spring, and rods 332 slidably connected to the shell 32 are respectively fixed at both ends along its length direction on the slide plate 33, and two rods 332 respectively cooperating with the two rods 332 are fixed on the pool body 10. The inner guide rails 40 are respectively located on the sides of the two conveying chains 20 that are away from each other. The end of the rod 1 332 away from the slide plate 33 has a rod 2 333 that stops at the inner circumferential surface of the inner guide rail 40. The rod 1 332 is located between the conveying chain 20 and the inner wall of the pool body 10. A partition 34 is fixedly provided in the shell 32, and an air cavity is provided between the partition 34 and the slide plate 33. A one-way valve 1 341 is provided on the partition 34, and a one-way valve 2 322 connected with the air cavity is provided on the shell 32. When the slide plate 33 moves toward the partition plate 34, the air cavity is squeezed, the one-way valve 1 341 is opened and the one-way valve 2 322 is closed. When the slide plate 33 moves in the direction away from the partition plate 34, the volume of the air cavity increases, the one-way valve 1 341 is closed and the one-way valve 2 322 is opened.

[0030] In this embodiment, taking one inner guide rail 40 and two corresponding rods 332 as an example, the inner guide rail 40 includes an inner arc portion 1 41, an inner horizontal portion 1 42, an inner arc portion 2 43, an inner horizontal portion 2 44 and an inner arc portion 3 45 connected in sequence, and there is a gap between the inner arc portion 1 41 and the inner arc portion 3 45. The radius of the inner arc portion 1 41 is consistent with that of the inner arc portion 2 43 and is smaller than that of the inner arc portion 3 45. The inner arc portion 1 41, the inner arc portion 43 and the inner horizontal portion 2 44 are connected in sequence. The inner arc portion 45 and the corresponding shaft rod 17 are coaxially arranged, the inner arc portion 43 and the corresponding shaft rod 17 are coaxially arranged, when the rod 2 333 stops against the inner arc portion 1 41, the inner horizontal portion 1 42, the inner arc portion 2 43 and the inner horizontal portion 2 44, the elastic member 5 331 is in a compressed state and the slide plate 33 is away from the partition 34, when the rod 2 333 stops against the inner arc portion 3 45, the elastic member 5 331 is reset and the slide plate 33 is close to the partition 34.

[0031] It can be understood that in the process from rod 2 333 and inner arc-shaped portion 1 41 disengaging from the stopper to rod 2 333 and inner arc-shaped portion 3 45 stopping, due to the gap between inner arc-shaped portion 1 41 and inner arc-shaped portion 3 45, the air cavity is quickly squeezed so that the gas in the air cavity can be quickly blown toward the scraper 31 through the multiple air outlets 321 corresponding thereto.

[0032] A slide bar 35 is slidably provided on the base frame 30 through an elastic member 2 351, and the elastic member 2 351 is specifically a second spring. A debris removing member 36 is slidably provided at the bottom of the slide bar 35 through an elastic member 3 361, and the elastic member 3 361 is specifically a third spring. There are two debris removing members 36 and they are located on both sides of the scraper 31. The setting of the elastic member 361 facilitates the debris removing member 36 to be tightly stopped against the side of the scraper 31. The outer side of the lower end of the base frame 30 has a mating surface 301 for the debris removing member 36 to slide toward the side of the scraper 31. An outer guide rail 50 that cooperates with the slide bar 35 is fixedly provided on the pool body 10. There are two outer guide rails 50 and they are respectively located on the side away from each other of the two conveying chains 20. The inner guide rail 40 is located on the inner ring side of the outer guide rail 50. The end of the slide bar 35 away from the debris removing member 36 has a rod 3 352 that stops against the inner circumferential surface of the outer guide rail 50.

[0033] In this embodiment, the outer guide rail 50 includes an outer arc portion 1 51, an outer horizontal portion 1 52, an outer arc portion 2 53, an outer horizontal portion 2 54 and an outer arc portion 3 55 connected in sequence, and there is a gap between the outer arc portion 1 51 and the outer arc portion 3 55. The radius of the outer arc portion 1 51 is consistent with that of the outer arc portion 2 53 and is smaller than that of the outer arc portion 3 55. The outer arc portion 1 51, the outer arc portion 3 55 and the corresponding shaft 17 are coaxially arranged. Part 2 53 and the corresponding shaft rod 17 are coaxially arranged. When rod three 352 abuts against outer arc-shaped part 1 51, outer horizontal part 1 52, outer arc-shaped part 2 53 and outer horizontal part 2 54, elastic part 2 351 is in a stretched state and debris removing part 36 abuts against the outer side of base frame 30. When rod three 352 abuts against outer arc-shaped part 3 55, elastic part 2 351 is reset and debris removing part 36 can scrape the waste residue on the surface of scraper 31 to collection area 15.

[0034] It can be understood that in the process from rod three 352 and outer arc-shaped portion one 51 disengaging from the stop to rod three 352 and outer arc-shaped portion three 55 stopping, due to the gap between outer arc-shaped portion one 51 and outer arc-shaped portion three 55, the debris removing component 36 can quickly slide from the outside of the base frame 30 to the surface of the scraper 31, and then scrape the waste residue on the surface of the scraper 31 to the collection area 15.

[0035] Specific working principle: Reference Figure 1-Figure 9, the motor 18 is controlled to rotate so that the conveying chain 20 rotates counterclockwise (viewed from front to rear along the axial direction of the shaft 17). Taking one of the base frames 30 as an example, when the scraper 31 is not in contact with the separation plate 14, the scraper 31 is in a state of extending outward from the base frame 30. The base frame 30 moves in the horizontal direction and causes the scraper 31 to push the scum on the liquid surface of the separation area 13 along the upper inclined surface 141 into the collection area 15. During this process, the scraper 31 stops at the upper inclined surface 141 and gradually moves into the base frame 30. The residual water in the scum can flow back into the separation area 13 through the filter hole 310, thereby preventing the water in the scum from being pushed into the collection area 15 by the scraper 31. As the conveying chain 20 continues to rotate, when the scraper 31 is separated from the upper inclined surface 141, under the action of the lower inclined surface 142 and the elastic member 311, the scraper 31 gradually extends outward from the base frame 30 and resets to the initial state.

[0036] When the scraper 31 is reset to the initial state, along the rotation direction of the conveying chain 20, the sliding bar 35 located in front of the scraper 31 first disengages from the stopper of the outer arc-shaped portion 151. At this time, under the action of the elastic member 2 351, the debris removing member 36 on the sliding bar 35 can slide quickly along the side of the scraper 31, and then scrape the waste residue on the surface of the scraper 31 corresponding to the debris removing member 36 into the collection area 15. Then, along the rotation direction of the conveying chain 20, the rod 1 332 located in front of the scraper 31 disengages from the stopper of the inner arc-shaped portion 141. At this time, under the action of the elastic member 5 331, the slide plate 33 on the rod 1 332 quickly squeezes the corresponding air cavity, so that the gas in the air cavity can be quickly blown toward the scraper 31 through the multiple air outlets 321 corresponding to it, and the waste residue remaining on the surface of the scraper 31 corresponding to the air cavity is blown into the collection area 15. At the same time, the waste residue in the filter hole 310 can also be blown into the collection area 15.

[0037] Subsequently, along the rotation direction of the conveyor chain 20, the slide bar 35 located behind the scraper 31 disengages from the stopper of the outer arc-shaped portion 51, and at this time, the debris removing component 36 on the slide bar 35 can quickly slide along the side of the scraper 31, and then scrape the waste residue on the surface of the scraper 31 corresponding to the debris removing component 36 into the collection area 15, and then, along the rotation direction of the conveyor chain 20, the rod 332 located behind the scraper 31 disengages from the stopper of the inner arc-shaped portion 41, and the slide plate 33 on the rod 332 quickly squeezes the corresponding air cavity, so that the gas in the air cavity can be quickly blown toward the scraper 31 through the multiple air outlets 321 corresponding to it, and blow the waste residue remaining on the surface of the scraper 31 corresponding to the air cavity into the collection area 15, and at the same time, the waste residue in the filter hole 310 can also be blown into the collection area 15.

[0038] Next, as the conveying chain 20 continues to rotate, the rod 1 332 can stop against the inner arc-shaped portion 3 45, and then the elastic member 5 331 is compressed again and the slide plate 33 moves away from the partition 34, the slide rod 35 can stop against the outer arc-shaped portion 3 55, and then the elastic member 2 351 is stretched again and the debris removal member 36 moves from the side of the scraper 31 to the side of the base frame 30.

[0039] Next, as the conveying chain 20 continues to rotate, the scraper 31 can scrape the scum on the liquid surface of the separation area 13 into the collection area 15 well, and the scraper 31 will not push the water in the separation area 13 into the collection area 15, and the scraper 31 can maintain a clean state before each contact with the scum, so as to facilitate smooth and efficient scraping.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A waste alkali liquid treatment device, comprising a tank body and a reaction zone, an air flotation contact zone, a separation zone, a separation plate, a collection zone and a clean water zone arranged in sequence in the tank body, two conveying chains are rotatably arranged on the separation zone, and the separation plate has an upper inclined surface and a lower inclined surface, characterized in that: A plurality of base frames are arranged between the two conveying chains, an inner guide rail and an outer guide rail are arranged on the pool body, a scraper matched with the separation plate is slidably arranged on the base frame through an elastic member 1, the scraper has filter holes, and the two ends of the scraper are respectively in contact with the inner wall of the pool body along its length direction, a shell is respectively arranged on both sides of the scraper on the base frame, and a plurality of air outlets are arranged at the lower end of the shell along its length direction, a slide plate matched with the inner guide rail is slidably arranged in the shell through an elastic member 5, a partition is arranged in the shell, and an air cavity is arranged between the partition and the slide plate, a sliding rod matched with the outer guide rail is slidably arranged on the base frame through an elastic member 2, and a debris removing part is slidably arranged at the bottom of the sliding rod through an elastic member 3, and there are two debris removing parts and they are located on both sides of the scraper, and when the conveying chain rotates and the scraper is separated from the lower inclined surface, the debris removing part can scrape the waste residue on the scraper surface to the collection area, and then the air cavity is compressed so that the gas in the air cavity can blow off the residue on the scraper surface through the air outlet; The inner guide rail comprises an inner arc portion 1, an inner horizontal portion 1, an inner arc portion 2, an inner horizontal portion 2 and an inner arc portion 3 which are connected in sequence, a rod 1 which is slidably connected to the housing is provided on the slide plate, and an end of the rod 1 which is away from the slide plate has a rod 2 which abuts against the inner circumferential surface of the inner guide rail; There is a gap between the inner arc portion 1 and the inner arc portion 3, and the radius of the inner arc portion 1 is consistent with that of the inner arc portion 2 and is smaller than that of the inner arc portion 3; The outer guide rail comprises an outer arc portion 1, an outer horizontal portion 1, an outer arc portion 2, an outer horizontal portion 2 and an outer arc portion 3 which are connected in sequence, and an end of the slide bar away from the debris removal member comprises a rod 3 which abuts against the inner circumference of the outer guide rail; There is a gap between the outer arc-shaped portion 1 and the outer arc-shaped portion 3, and the radius of the outer arc-shaped portion 1 is consistent with that of the outer arc-shaped portion 2 and is smaller than that of the outer arc-shaped portion 3.

2. A waste alkali solution treatment device according to claim 1, characterized in that: A one-way valve 1 is arranged on the partition, and a one-way valve 2 connected with the air cavity is arranged on the shell. When the air cavity is squeezed by the slide plate, the one-way valve 1 is opened and the one-way valve 2 is closed.

3. A waste alkali solution treatment device according to claim 1, characterized in that: The outer side of the lower end of the base frame is provided with a matching surface for the debris removing member to slide toward the side of the scraper.

4. A waste alkali solution treatment device according to claim 1, characterized in that: The air outlet is arranged obliquely and faces the scraper.

5. A method for treating a waste alkali solution treatment device according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Control the conveyor chain to rotate. The scraper first stops at the upper slope and pushes the scum in the separation area to move to the lower slope. The scraper slides into the base frame, and the water mixed in the scum flows back to the separation area from the filter holes. S2: When the scraper is separated from the lower slope, the scraper is reset, and the debris removal part slides rapidly along the side of the scraper to scrape the waste residue on the scraper surface to the collection area; S3: Then the two slide plates compress the corresponding air cavities in turn, so that the gas in the air cavities can blow away the residues on the scraper surface and in the filter holes through the air outlet.

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