An apparatus for treating polyether polyol production wastewater

Abstract

The application discloses a device for treating polyether polyol production wastewater, which comprises an aerobic tank, a water inlet pipe fixedly installed on the upper surface of the aerobic tank, and an aerobic treatment device; wherein the aerobic treatment device comprises a driving motor fixedly installed on the upper surface of the aerobic tank, a rotating shaft fixedly installed at the output end of the driving motor, an aerobic plate fixedly installed on the circumferential surface of the rotating shaft, an aerobic pipe fixedly installed at the bottom of the rotating shaft and penetrating through the bottom of the aerobic tank, a rack fixedly installed at the bottom of the aerobic tank, an oxygen exhaust pipe rotatably installed in the aerobic plate, and a gear fixedly installed at the end of the oxygen exhaust pipe away from the rotating shaft; the driving motor drives the aerobic plate to continuously rotate, so that the wastewater in the aerobic tank is continuously stirred, the sludge deposition problem caused by water body static is effectively avoided, the aerobic bacteria are ensured to fully contact with the organic matters in the wastewater, and the situation that the sludge accumulation inhibits the activity of the bacterial colony is avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an apparatus for treating wastewater from the production of polyether polyols. Background Technology

[0002] Wastewater treatment equipment for polyether polyol production typically employs a combined process of "physicochemical pretreatment + biological treatment": the wastewater first passes through a collection tank and equalization tank for homogenization and equalization, and then passes through an air flotation device or coagulation sedimentation to remove suspended solids and some organic matter, thereby reducing the load on subsequent biological treatment; it then enters the biological treatment unit, which often uses processes such as hydrolysis acidification, UBF, contact oxidation or CBR to utilize microorganisms to degrade dissolved organic pollutants; after the biological effluent passes through a secondary sedimentation tank for sludge-water separation, some processes also combine ozone oxidation or filtration for advanced treatment units to ensure that the effluent consistently meets discharge standards.

[0003] Patent publication number CN210215106U relates to a wastewater treatment device for polyether polyol production, including a filter box with a hinged flip cover at the top and wastewater pipe interfaces symmetrically opened at both ends of the flip cover. A fixing frame is snapped into the inner wall of the filter box, and a filter screen is placed on the fixing frame. Overflow slots are symmetrically opened at both ends of the bottom of the filter box and are connected to a primary sedimentation tank. A first valve is installed at one end of the bottom of the primary sedimentation tank. This patent discharges particulate debris and impurities from the wastewater through the filter box and filter screen. The wastewater enters an aeration tank from the primary sedimentation tank to control the dissolved oxygen concentration, and then enters a secondary sedimentation tank from the aeration tank. The generated sludge is sent to a sludge treatment plant. The settled wastewater is pumped to a biochemical enhancement tank, mixed with added nitrogen and phosphorus nutrient solution, and then enters a disinfection chamber. Finally, it flows through a separation membrane to a water quality testing tank. The treatment is highly efficient and environmentally friendly.

[0004] In the aforementioned patent, particulate matter and debris in the wastewater are discharged through a filter box and filter screen. The wastewater enters the aeration tank from the primary sedimentation tank to control the dissolved oxygen concentration, and then enters the secondary sedimentation tank from the aeration tank. The generated sludge is sent to a sludge treatment plant. The settled wastewater is pumped to the biochemical enhancement tank, where it is mixed with added nitrogen and phosphorus nutrient solution and then enters the disinfection chamber. Finally, it flows through the separation membrane to the water quality testing tank. The treatment is highly efficient and environmentally friendly. However, in actual use, the stillness of the water in the aerobic tank will cause sludge sedimentation in the wastewater. The sedimentation will isolate aerobic bacteria at the bottom of the sludge, thus affecting the reaction efficiency of aerobic bacteria. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an apparatus for treating wastewater from polyether polyol production, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an apparatus for treating wastewater from the production of polyether polyols, comprising an aerobic tank, wherein an inlet pipe is fixedly installed on the upper surface of the aerobic tank, and further comprising an aerobic treatment device; The aerobic treatment device includes a drive motor, which is fixedly installed on the upper surface of the aerobic tank. A rotating shaft is fixedly installed at the output end of the drive motor. An aerobic plate is fixedly installed on the circumference of the rotating shaft. An aerobic pipe is fixedly installed at the bottom of the rotating shaft and penetrates the bottom of the aerobic tank. A rack is fixedly installed at the bottom of the aerobic tank. An oxygen discharge pipe is rotatably installed inside the aerobic plate. A gear is fixedly installed at the end of the oxygen discharge pipe away from the rotating shaft. Thus, the rotation of the aerobic plate continuously agitates the water in the tank, allowing the organic matter in the wastewater and the aerobic bacteria attached to the plate to fully contact each other, preventing sludge from settling in the water due to stagnant water flow, which would affect the decomposition efficiency of the aerobic bacteria.

[0007] According to the above technical solution, there are three gears, which mesh with each other. The gears mesh with the rack. The aerobic tube and the oxygen exhaust tube are connected. The oxygen exhaust tube has an exhaust hole on its circumference. The oxygen released from the exhaust hole is more evenly distributed by the rotation of the oxygen exhaust tube. This can cut large bubbles into tiny bubbles, greatly increase the contact area between oxygen and aerobic bacteria, and significantly improve the working efficiency of aerobic bacteria.

[0008] According to the above technical solution, a sliding groove is provided at the bottom of the aerobic tank. The sliding groove is petal-shaped. A scraper is slidably installed on the side of the aerobic plate. A circular block is fixedly installed on the lower surface of the scraper. The circular block slides inside the sliding groove, thereby scraping away the aged and excess outer biofilm on the surface of the aerobic plate by the scraper, so as to maintain the vitality and efficiency of aerobic bacteria and improve the efficiency of aerobic bacteria in decomposing organic matter.

[0009] According to the above technical solution, it also includes a conveying device, which includes a conveying chamber, a pressure plate slidably installed inside the conveying chamber, a reciprocating screw section in the middle of the rotating shaft, an annular plate rotatably installed on the circumferential surface of the reciprocating screw, a connecting rod slidably installed on the lower surface of the annular plate, the connecting rod and the upper surface of the pressure plate being fixed, a drain pipe being fixedly installed on the left side of the conveying chamber, and a suction pipe being fixedly installed on the lower surface of the conveying chamber. Thus, the pressure plate is driven to move up and down reciprocally by the rotation of the reciprocating screw, thereby realizing the quantitative conveying of treated wastewater from the aerobic tank to the sedimentation tank.

[0010] According to the above technical solution, a one-way outlet valve is installed inside the drain pipe, and a one-way inlet valve is installed inside the suction pipe, so that when the pressure plate moves upward, the wastewater treated by aerobic bacteria enters the conveying chamber through the suction pipe, and when the pressure plate moves downward, the wastewater flows from the drain pipe into the sedimentation tank.

[0011] According to the above technical solution, a filter plate is fixedly installed on the lower surface of the water suction pipe, a sedimentation tank is fixedly installed on the left side of the aerobic tank, and the drain pipe is fixed on the left side and passes through the sedimentation tank. Thus, the filter plate filters out aerobic bacteria, suspended particulate matter and other impurities carried in the wastewater, preventing impurities from entering subsequent processes and affecting the wastewater treatment efficiency.

[0012] According to the above technical solution, it also includes a dosing device, which includes a dosing pipe fixedly installed on the upper surface of a drain pipe. A sliding plate is slidably installed inside the drain pipe, and a throttling orifice is opened on the surface of the sliding plate. A rotating rod is rotatably installed on the upper surface of the pressure plate. The end of the rotating rod away from the pressure plate rotates inside the sliding plate, so that when the sliding plate moves to the left, when the throttling orifice is aligned with the flow channel inside the dosing pipe, the flocculant flows from the dosing pipe into the wastewater; when the sliding plate moves to the right, when the throttling orifice leaves the flow channel inside the dosing pipe, the dosing pipe is closed to prevent the flocculant from flowing out and wasting the agent; at the same time, the up-and-down reciprocating movement of the pressure plate realizes the quantitative dosing of flocculant, preventing excessive addition of flocculant and waste of agent, and preventing incomplete sedimentation in the wastewater when the flocculant is too little.

[0013] According to the above technical solution, a pressure rod is fixedly installed on the lower surface of the pressure plate, and a rotating rod is rotatably installed on the side of the pressure rod. A cleaning plate is slidably installed on the lower surface of the filter plate. The end of the rotating rod away from the pressure rod rotates inside the cleaning plate, thereby cleaning the surface of the filter plate and preventing a large amount of impurities from accumulating on the surface of the filter plate, causing blockage of the filter plate and thus affecting the filtration efficiency of the filter plate.

[0014] This invention provides an apparatus for treating wastewater from the production of polyether polyols. It has the following beneficial effects: (1) The device for treating wastewater from polyether polyol production drives the aerobic plate to rotate continuously by a drive motor, which can continuously agitate the wastewater in the aerobic tank, effectively avoiding the problem of sludge sedimentation caused by water stasis, ensuring that aerobic bacteria and organic matter in wastewater are in full contact, avoiding the situation where sludge accumulation inhibits bacterial activity. At the same time, the oxygen discharge pipe rotates with the gear and rack structure, which can cut the discharged large bubbles into small bubbles, making the oxygen more evenly distributed in the water, greatly increasing the contact area between oxygen and aerobic bacteria, and significantly enhancing the decomposition efficiency of aerobic bacteria on organic matter in wastewater.

[0015] (2) The device for treating polyether polyol production wastewater uses the rotational power of the aerobic plate to drive the scraper to cooperate with the circular block and the sliding groove to complete the limiting sliding, which can automatically scrape off the aged and redundant outer biofilm on the surface of the aerobic plate. During long-term operation, it can always maintain the activity and optimal working state of the aerobic bacteria community, avoid the problem of aged biofilm accumulation covering the effective bacteria community and hindering the mass transfer reaction, and effectively improve the mass transfer efficiency of aerobic bacteria.

[0016] (3) The device for treating wastewater from polyether polyol production drives a reciprocating screw to rotate via a drive motor, which drives the pressure plate to move up and down in the conveying chamber. By utilizing the principle of negative pressure adsorption and positive pressure pushing, the device achieves automated and quantitative conveying of wastewater after aerobic treatment. When the pressure plate moves up, it forms a negative pressure to accurately suck in the treated wastewater, and when it moves down, it pushes the wastewater into the sedimentation tank. The entire linkage structure operates stably and can accurately control the amount of wastewater conveyed.

[0017] (4) The device for treating polyether polyol production wastewater uses the reciprocating motion of the pressure plate to drive the sliding plate, and the staggered cooperation between the throttling orifice and the dosing pipe to achieve quantitative intermittent dosing of flocculant. This effectively avoids the problem of excessive waste of flocculant or insufficient dosing leading to incomplete sedimentation, accurately controls the dosing precision, and saves treatment costs. At the same time, the pressure plate moves back and forth on the filter plate surface to clean the bacteria and suspended impurities accumulated on the filter plate surface in real time, preventing the filter plate from clogging and thus affecting the filtration efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the wastewater treatment device of the present invention; Figure 2 This is a schematic cross-sectional view of the wastewater treatment device of the present invention; Figure 3 This is a schematic diagram of the aerobic treatment device of the present invention; Figure 4 This is a schematic diagram of the internal structure of the aerobic plate of the present invention; Figure 5 This is a schematic diagram of the conveying device structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of section A; Figure 7 This is a schematic diagram of the dosing device of the present invention.

[0019] In the diagram: 1. Aerobic tank; 2. Inlet pipe; 401. Drive motor; 402. Rotating shaft; 403. Aerobic plate; 404. Aerobic pipe; 405. Rack; 406. Gear; 407. Exhaust pipe; 408. Scraper; 409. Sliding trough; 410. Circular block; 501. Conveying chamber; 502. Pressure plate; 503. Reciprocating screw; 504. Annular plate; 505. Connecting rod; 506. Suction pipe; 507. Drain pipe; 508. Filter plate; 509. Sedimentation tank; 601. Dosing pipe; 602. Rotating rod two; 603. Slide plate; 604. Throttling orifice; 605. Pressure rod; 606. Rotating rod one; 607. Cleaning plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-7 One embodiment of the present invention is: an apparatus for treating wastewater from the production of polyether polyols, including an aerobic tank 1, an inlet pipe 2 fixedly installed on the upper surface of the aerobic tank 1, and an aerobic treatment device. The aerobic treatment device includes a drive motor 401, which is fixedly installed on the upper surface of the aerobic tank 1. A rotating shaft 402 is fixedly installed at the output end of the drive motor 401. An aerobic plate 403 is fixedly installed on the circumferential surface of the rotating shaft 402. An aerobic pipe 404 is fixedly installed at the bottom of the rotating shaft 402 and passes through the bottom of the aerobic tank 1. A rack 405 is fixedly installed at the bottom of the aerobic tank 1. An oxygen discharge pipe 407 is rotatably installed inside the aerobic plate 403. A gear 406 is fixedly installed at the end of the oxygen discharge pipe 407 away from the rotating shaft 402. Thus, the rotation of the aerobic plate 403 continuously agitates the water in the tank, allowing the organic matter in the wastewater and the aerobic bacteria attached to the plate to come into full contact, preventing sludge from settling in the water due to stagnant water flow, which would affect the decomposition efficiency of the aerobic bacteria.

[0022] There are three gears 406, which mesh with each other. The gears 406 mesh with the rack 405. The aerobic pipe 404 and the oxygen exhaust pipe 407 are connected. The oxygen exhaust pipe 407 has an exhaust hole on its circumference. The oxygen released by the exhaust hole is more evenly distributed by the rotation of the oxygen exhaust pipe 407. It can cut large bubbles into small bubbles, greatly increase the contact area between oxygen and aerobic bacteria, and significantly improve the working efficiency of aerobic bacteria.

[0023] The bottom of the aerobic tank 1 is provided with a sliding groove 409, which is designed in the shape of a petal. A scraper 408 is slidably installed on the side of the aerobic plate 403. A circular block 410 is fixedly installed on the lower surface of the scraper 408. The circular block 410 slides inside the sliding groove 409, thereby scraping away the aged and excess outer biofilm on the surface of the aerobic plate 403 by the scraper 408, so as to maintain the vitality and efficiency of aerobic bacteria and improve the efficiency of aerobic bacteria in decomposing organic matter.

[0024] In this embodiment, the polyether polyol wastewater is added into the aerobic tank 1 through the inlet pipe 2. The drive motor 401 is started, which drives the rotating shaft 402 to rotate. The rotation of the rotating shaft 402 drives the aerobic plate 403 to rotate, which in turn drives the exhaust pipe 407 to rotate. The rotation of the exhaust pipe 407 drives the gear 406 to rotate. The gear 406 rotates by being limited by the rack 405. The rotation of the gear 406 drives the exhaust pipe 407 to rotate. At the same time, oxygen is introduced through the aerobic pipe 404 and discharged through the exhaust holes on the circumferential surface of the exhaust pipe 407. Thus, the rotation of the aerobic plate 403 continuously agitates the water in the tank, allowing the organic matter in the wastewater and the aerobic bacteria attached to the plate to fully contact each other. This prevents sludge from settling in the water due to stagnant water flow, which would affect the decomposition efficiency of aerobic bacteria. Simultaneously, the rotation of the oxygen exhaust pipe 407 allows for a more even distribution of oxygen released from the exhaust port, breaking large air bubbles into smaller ones, greatly increasing the contact area between oxygen and aerobic bacteria, and significantly improving the working efficiency of aerobic bacteria. The rotation of the aerobic plate 403 drives the rotation of the scraper 408, which in turn drives the rotation of the circular block 410. The scraper 408 slides on the surface of the aerobic plate 403 through the limitation of the circular block 410 and the sliding groove 409, thereby scraping away the aged and excess outer biofilm on the surface of the aerobic plate 403 to maintain the vitality and effectiveness of aerobic bacteria and improve their efficiency in decomposing organic matter.

[0025] Please see Figures 1-7 Based on the above embodiments, another embodiment of the present invention further includes a conveying device, which includes a conveying chamber 501. A pressure plate 502 is slidably installed inside the conveying chamber 501. A reciprocating screw 503 is provided in the middle of the rotating shaft 402. An annular plate 504 is rotatably installed on the circumferential surface of the reciprocating screw 503. A connecting rod 505 is slidably installed on the lower surface of the annular plate 504. The connecting rod 505 is fixed to the upper surface of the pressure plate 502. A drain pipe 507 is fixedly installed on the left side of the conveying chamber 501. A suction pipe 506 is fixedly installed on the lower surface of the conveying chamber 501. Thus, the rotation of the reciprocating screw 503 drives the pressure plate 502 to move up and down reciprocally, thereby realizing the quantitative conveying of treated wastewater from the aerobic tank 1 to the sedimentation tank 509.

[0026] The drain pipe 507 is equipped with a one-way outlet valve, and the suction pipe 506 is equipped with a one-way inlet valve. When the pressure plate 502 moves upward, the wastewater treated by aerobic bacteria enters the conveying chamber 501 through the suction pipe 506. When the pressure plate 502 moves downward, the wastewater flows from the drain pipe 507 into the sedimentation tank 509.

[0027] A filter plate 508 is fixedly installed on the lower surface of the suction pipe 506, a sedimentation tank 509 is fixedly installed on the left side of the aerobic tank 1, and a drain pipe 507 is fixed on the left side and passes through the sedimentation tank 509. Thus, the filter plate 508 filters out aerobic bacteria, suspended particulate matter and other impurities carried in the wastewater, preventing impurities from entering subsequent processes and affecting the wastewater treatment efficiency.

[0028] In this embodiment, during operation: the drive motor 401 is started and rotates, which in turn drives the rotating shaft 402 to rotate. The rotating shaft 402 then drives the reciprocating screw 503 to rotate, which in turn drives the annular plate 504 to slide up and down. The annular plate 504 then drives the connecting rod 505 to slide up and down, which in turn drives the pressure plate 502 to slide up and down. As the pressure plate 502 moves upward, a negative pressure is created inside the conveying chamber 501. After treatment by aerobic bacteria... Wastewater is drawn into the conveying chamber 501 through the suction pipe 506 under atmospheric pressure. At the same time, it is filtered by the filter plate 508 to remove aerobic bacteria, suspended particulate matter and other impurities carried in the wastewater, preventing impurities from entering the subsequent process and affecting the wastewater treatment efficiency. When the pressure plate 502 moves downward, the wastewater flows from the drain pipe 507 into the sedimentation tank 509. The rotation of the reciprocating screw 503 drives the pressure plate 502 to move up and down, realizing the quantitative delivery of the treated wastewater from the aerobic tank 1 to the sedimentation tank 509.

[0029] Please see Figures 1-7 Based on the above embodiments, another embodiment of the present invention further includes a dosing device, which includes a dosing pipe 601, which is fixedly installed on the upper surface of a drain pipe 507. A sliding plate 603 is slidably installed inside the drain pipe 507. A throttling orifice 604 is opened on the surface of the sliding plate 603. A rotating rod 602 is rotatably installed on the upper surface of a pressure plate 502. The end of the rotating rod 602 away from the pressure plate 502 rotates inside the sliding plate 603, thereby causing the sliding plate 603 to move to the left. When the throttling orifice 604 is aligned with the flow channel inside the dosing pipe 601, the flocculant flows from the dosing pipe 601 into the wastewater. When the slide plate 603 moves to the right, the dosing pipe 601 is closed when the throttling orifice 604 leaves the flow channel inside the dosing pipe 601, preventing the flocculant from flowing out and causing waste. At the same time, the up-and-down reciprocating movement of the pressure plate 502 enables the quantitative dosing of flocculant, preventing excessive flocculant addition and waste, and ensuring thorough sedimentation in the wastewater when there is too little flocculant.

[0030] A pressure rod 605 is fixedly installed on the lower surface of the pressure plate 502. A rotating rod 606 is rotatably installed on the side of the pressure rod 605. A cleaning plate 607 is slidably installed on the lower surface of the filter plate 508. The end of the rotating rod 606 away from the pressure rod 605 rotates inside the cleaning plate 607, thereby cleaning the surface of the filter plate 508 and preventing a large amount of impurities from accumulating on the surface of the filter plate 508, which would cause the filter plate 508 to become clogged and thus affect the filtration efficiency of the filter plate 508.

[0031] In this embodiment, when the pressure plate 502 moves upward, it drives the sliding plate 603 to move to the left via the rotating rod 602. When the pressure plate 502 moves downward, it drives the sliding plate 603 to move to the right via the rotating rod 602. When the sliding plate 603 moves to the left, and the throttling orifice 604 is aligned with the flow channel inside the dosing pipe 601, the flocculant flows from the dosing pipe 601 into the wastewater. When the sliding plate 603 moves to the right, and the throttling orifice 604 leaves the flow channel inside the dosing pipe 601, the dosing pipe 601 closes, preventing flocculant from flowing out and wasting the agent. The up-and-down reciprocating movement of the pressure plate 502 enables the quantitative addition of flocculant, preventing excessive flocculant addition and waste, and ensuring thorough sedimentation in the wastewater if too little flocculant is added. The up-and-down reciprocating movement of the pressure plate 502 drives the pressure rod 605 to move up and down, which in turn drives the cleaning plate 607 to move horizontally back and forth on the surface of the filter plate 508 via the rotating rod 606. This cleans the surface of the filter plate 508, preventing the accumulation of a large amount of impurities that could clog the filter plate 508 and thus affect its filtration efficiency.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for treating wastewater from the production of polyether polyols, comprising an aerobic tank (1), wherein an inlet pipe (2) is fixedly installed on the upper surface of the aerobic tank (1), characterized in that: It also includes aerobic treatment devices; The aerobic treatment device includes a drive motor (401), which is fixedly installed on the upper surface of the aerobic tank (1). A rotating shaft (402) is fixedly installed at the output end of the drive motor (401). An aerobic plate (403) is fixedly installed on the circumferential surface of the rotating shaft (402). An aerobic pipe (404) is fixedly installed at the bottom of the rotating shaft (402). The aerobic pipe (404) is fixed and penetrates the bottom of the aerobic tank (1). A rack (405) is fixedly installed at the bottom of the aerobic tank (1). An oxygen discharge pipe (407) is rotatably installed inside the aerobic plate (403). A gear (406) is fixedly installed at the end of the oxygen discharge pipe (407) away from the rotating shaft (402).

2. The apparatus for treating wastewater from polyether polyol production according to claim 1, characterized in that: The gear (406) is provided in three parts, the three gears (406) mesh with each other, the gear (406) meshes with the rack (405), the aerobic pipe (404) and the oxygen exhaust pipe (407) are connected, and the oxygen exhaust pipe (407) has an exhaust hole on its circumferential surface.

3. The apparatus for treating wastewater from polyether polyol production according to claim 2, characterized in that: The aerobic tank (1) has a sliding groove (409) at the bottom, the sliding groove (409) is petal-shaped, a scraper (408) is slidably installed on the side of the aerobic plate (403), and a circular block (410) is fixedly installed on the lower surface of the scraper (408). The circular block (410) slides inside the sliding groove (409).

4. The apparatus for treating wastewater from polyether polyol production according to claim 3, characterized in that: It also includes a conveying device, which includes a conveying chamber (501), a pressure plate (502) is slidably installed inside the conveying chamber (501), a reciprocating screw (503) is provided in the middle of the rotating shaft (402), an annular plate (504) is rotatably installed on the circumferential surface of the reciprocating screw (503), a connecting rod (505) is slidably installed on the lower surface of the annular plate (504), the connecting rod (505) is fixed to the upper surface of the pressure plate (502), a drain pipe (507) is fixedly installed on the left side of the conveying chamber (501), and a water suction pipe (506) is fixedly installed on the lower surface of the conveying chamber (501).

5. The apparatus for treating wastewater from polyether polyol production according to claim 4, characterized in that: The drain pipe (507) is equipped with a one-way outlet valve, and the suction pipe (506) is equipped with a one-way inlet valve.

6. The apparatus for treating wastewater from polyether polyol production according to claim 5, characterized in that: A filter plate (508) is fixedly installed on the lower surface of the water suction pipe (506), a sedimentation tank (609) is fixedly installed on the left side of the aerobic tank (1), and the drain pipe (507) is fixed on the left side and passes through the sedimentation tank (509).

7. The apparatus for treating wastewater from polyether polyol production according to claim 6, characterized in that: It also includes a dosing device, which includes a dosing pipe (601), the dosing pipe (601) is fixedly installed on the upper surface of the drain pipe (507), a sliding plate (603) is slidably installed inside the drain pipe (507), a throttling hole (604) is opened on the surface of the sliding plate (603), and a rotating rod (602) is rotatably installed on the upper surface of the pressure plate (502), the end of the rotating rod (602) away from the pressure plate (502) rotates inside the sliding plate (603).

8. The apparatus for treating wastewater from polyether polyol production according to claim 7, characterized in that: A pressure rod (605) is fixedly installed on the lower surface of the pressure plate (502), and a rotating rod (606) is rotatably installed on the side of the pressure rod (605). A cleaning plate (607) is slidably installed on the lower surface of the filter plate (508), and the end of the rotating rod (606) away from the pressure rod (605) rotates inside the cleaning plate (607).

Images