Filtering equipment for producing polyethylene glycol and filtering method thereof

Abstract

The invention discloses filtering equipment for producing polyethylene glycol and a filtering method thereof.The filtering equipment for producing polyethylene glycol comprises a rectangular shell, a cover plate is arranged at the top of the rectangular shell, a waste liquid pipe is fixedly installed at the bottom of the right side of the rectangular shell, and a liquid inlet pipe is fixedly installed on the right side of the rectangular shell; a waste gas pipe is arranged on the left side of the rectangular shell; an exhaust pipe is fixedly mounted at the top of the cover plate; the right side of the rectangular shell is provided with three groups of filtering mechanisms and dismounting mechanisms which are arranged at equal intervals, the filtering mechanisms are matched with the dismounting mechanisms, and each filtering mechanism comprises a filtering plate, a sealing insertion frame, two fixing blocks, two butt joint fixing frames and a reset spring. When the waste gas is discharged, dust can be filtered out by clean water in the rectangular shell, and then the waste gas is filtered by a plurality of filter plates on the inner side of the rectangular shell, so that the emission standard is met, and the health of workers is prevented from being harmed.

Description

Technical Field

[0001] The present invention relates to the technical field of filtration equipment, and particularly relates to a filtration equipment for producing polyethylene glycol and a filtration method thereof. Background Art

[0002] Polyethylene glycol series products are non-irritating, have good water solubility, and have good compatibility with many organic components. They have excellent lubricity, moisturizing property, dispersibility, adhesives, antistatic agents, softeners, etc., and are widely used in industries such as cosmetics, pharmaceuticals, metal processing, and food processing. Among them, polyethylene glycol is in granular powder form, has a slight peculiar smell, and is easily soluble in water. When producing polyethylene glycol products, an air filtration device is required.

[0003] The utility model with the publication number of CN218980962U provides an air filtration device for polyethylene glycol production equipment, belonging to the technical field of polyethylene glycol production. This air filtration device for polyethylene glycol production equipment includes a box body. One side of the box body is fixedly connected with an air inlet pipe. The bottom of one end of the air inlet pipe is sleeved with a movable sleeve. The bottom of the movable sleeve is fixedly connected with a bottom plate. An electric telescopic rod is fixedly connected inside the box body. The bottom of the electric telescopic rod is fixedly connected with the bottom plate. A water tank is arranged at the inner bottom of the box body. The movable sleeve is located inside the water tank. An air filter element is arranged at the inner top of the box body. This air filtration device for polyethylene glycol production equipment can move the water tank out of the device through the cooperation among the water tank, the movable sleeve, the cover plate, the pull ring, and the stopper, making it more convenient to clean the sludge inside the water tank, saving time and effort in operation, and being conducive to popularization and use.

[0004] The utility model with the publication number of CN217594223U provides an air filtration device for polyethylene glycol production equipment, belonging to the technical field of polyethylene glycol production. It solves the problems that in the current process of polyethylene glycol production, directly discharging waste gas and dust will not only cause environmental pollution but also endanger the health of workers. This air filtration device for polyethylene glycol production equipment includes a machine body. A support plate is fixedly connected to the right side of the machine body. The other side of the support plate is fixedly connected with a housing. A blower is arranged on the top of the support plate. The right side of the machine body is communicated with an exhaust pipe. An air suction pipe is communicated between the top of the blower and the exhaust pipe. An air outlet pipe is arranged inside the housing. A delivery pipe is communicated between the right side of the blower and the air outlet pipe. A plurality of air outlet structures are arranged on the surface of the air outlet pipe. A cross plate is fixedly connected between the inner walls of the housing. A fan is arranged inside the cross plate. This utility model can not only filter dust but also purify waste gas.

[0005] The utility model with the publication number of CN209204776U discloses a filtering device for polyethylene glycol ether production, which includes a movable box body, a filter screen, a polyethylene glycol ether collection tank and an impurity collection tank. Both the left and right sides of the movable box body are slidably connected with a fixed frame through first chutes. The lower corners of the movable box body are connected to the bottom plate through connecting springs respectively. The inner sides of the left and right surfaces of the movable box body are connected to movable plates through rotary joints respectively. The filter screen is installed in the middle of the lower surface of the movable box body, and a cleaning part is arranged above the filter screen. Both the front and rear sides of the cleaning part are slidably connected with a second chute through sliders. The lower part of the slider is connected to the front and rear surfaces of the bottom plate through a connecting arm. The polyethylene glycol ether collection tank and the impurity collection tank are both arranged above the bottom plate. During the process of filtering polyethylene glycol ether, the filtering device for polyethylene glycol ether production can also clean the impurities on the surface of the filter screen, avoiding the accumulation of impurities on the surface of the filter screen and causing the blockage of the filter screen.

[0006] When producing polyethylene glycol products, a large amount of dust and waste gas will be generated. If the waste gas and dust are directly discharged into the external air, it will not only cause pollution to the surrounding environment, but also endanger the health of the staff. At the same time, the filtering equipment is not convenient for replacing and stably installing the filter element, and it is also not convenient for cleaning the filtering equipment. Therefore, the present invention proposes a filtering equipment for producing polyethylene glycol and its filtering method to solve the above problems. Summary of the Invention

[0007] Based on the technical problems in the background art that if the waste gas and dust are directly discharged into the external air, it will not only cause pollution to the surrounding environment, but also endanger the health of the staff. At the same time, the filtering equipment is not convenient for replacing and stably installing the filter element, and it is also not convenient for cleaning the filtering equipment, the present invention proposes a filtering equipment for producing polyethylene glycol and its filtering method.

[0008] A filtering equipment for producing polyethylene glycol proposed by the present invention includes a rectangular outer shell. A cover plate is provided at the top of the rectangular outer shell. A waste liquid pipe is fixedly installed at the bottom right of the rectangular outer shell. A liquid inlet pipe is fixedly installed on the right side of the rectangular outer shell. A waste gas pipe is provided on the left side of the rectangular outer shell. An exhaust pipe is fixedly installed at the top of the cover plate.

[0009] Three groups of filtering mechanisms and disassembly mechanisms arranged at equal intervals are provided on the right side of the rectangular outer shell. The filtering mechanisms cooperate with the disassembly mechanisms. Two groups of sealing mechanisms and unlocking mechanisms are symmetrically arranged at the top of the rectangular outer shell respectively. The sealing mechanisms cooperate with the unlocking mechanisms and the rectangular outer shell respectively.

[0010] With the above mechanism: by discharging the exhaust gas into the inner side of the rectangular housing, the dust will be filtered out by the clean water in the rectangular housing, and then the exhaust gas will be filtered by multiple filter plates on the inner side of the rectangular housing to meet the emission standards and avoid harming the health of the staff.

[0011] Preferably, the filtering mechanism includes: a filter plate, a sealing insertion frame, two fixing blocks, two docking fixing frames and a return spring;

[0012] The outer side of the filter plate is in sliding contact with the inner wall of the rectangular housing. The filter plate is fixedly connected to the sealing insertion frame. The sealing insertion frame is in sliding contact with the right side of the rectangular housing. The fixing block is fixedly connected to the rectangular housing. The docking fixing frame is in sliding connection with the sealing insertion frame. The return spring is fixedly connected to the two docking fixing frames.

[0013] Further, after inserting the filter screen and the sealing insertion frame into the inner side of the rectangular housing, release the two docking fixing frames, so that the two docking fixing frames can automatically engage with the fixing blocks. The docking fixing frames can connect the sealing insertion frame and the fixing blocks to block the movement of the filter plate and the sealing insertion frame on the fixing blocks, so that the sealing insertion frame cannot be separated from the rectangular housing, realizing the installation of the sealing insertion frame and the filter plate, and enabling the filter plate to be stably located inside the rectangular housing.

[0014] Preferably, the disassembly mechanism includes: two rotating rods, a grip and a hollow unlocking frame;

[0015] Both of the two rotating rods are rotatably connected to the grip. The grip is fixedly connected to the sealing insertion frame. The hollow unlocking frame is in sliding contact with the rotating rods.

[0016] Further, after the hollow unlocking frame is pushed to move, the hollow unlocking frame can squeeze the two rotating rods to rotate, so that the left ends of the two rotating rods can approach each other. The two support positioning frames can be driven to approach each other through the two round blocks, so that the two support positioning frames can be disengaged from the two fixing blocks, realizing the unlocking of the sealing insertion frame and the filter plate, and the sealing insertion frame and the filter plate can be disassembled to replace the filter plate.

[0017] Preferably, the sealing mechanism includes: a fixing plate, a support positioning frame, a positioning spring and a spring seat;

[0018] The fixing plate is fixedly connected to the rectangular housing. The support positioning frame is in sliding connection with the cover plate. The support positioning frame cooperates with the fixing plate. The support positioning frame is fixedly connected to the positioning spring. The positioning spring is fixedly connected to the spring seat. The spring seat is fixedly connected to the cover plate.

[0019] Further, after the support positioning frame engages with the fixed plate, the support positioning frame can connect the cover plate and the rectangular housing to prevent the cover plate from detaching from the rectangular housing on the rectangular housing, thereby realizing the installation of the cover plate and enabling the cover plate to stably seal the rectangular housing.

[0020] Preferably, the unlocking mechanism includes: a hollow rotating frame and a handle;

[0021] The hollow rotating frame is rotatably connected to the top of the cover plate, and the handle is fixedly connected to the cover plate.

[0022] Further, when holding the handle, the hollow rotating frame is pushed to rotate, so that the hollow rotating frame can squeeze the support positioning frame to disengage from the fixed plate through the round rod, thereby realizing the unlocking of the cover plate and enabling the cover plate to open the rectangular housing for convenient cleaning of the rectangular housing.

[0023] Preferably, fixing grooves are formed on one side of each of the two fixing blocks close to each other, insertion blocks are fixedly installed on one side of each of the two docking fixing frames away from each other, the outer side of the insertion block is in sliding contact with the inner wall of the fixing groove, and round blocks are fixedly installed on the front side of each of the two docking fixing frames, and the round blocks are in sliding contact with the inner wall of the hollow rotating frame.

[0024] Further, after the insertion block is inserted into the inner side of the fixing groove, the positioning of the sealing insertion frame can be realized.

[0025] Preferably, a plurality of positioning grooves arranged at equal intervals are formed on the fixed plate, a positioning block is fixedly installed on the support positioning frame, the positioning block is in sliding contact with the inner wall of the positioning groove, and a round rod is fixedly installed on the front side of the support positioning frame, and the round rod is in sliding contact with the inner wall of the hollow rotating frame.

[0026] Further, after the positioning block is inserted into the inner side of the positioning groove, the positioning block can block the movement of the cover plate to realize the positioning of the cover plate.

[0027] Preferably, a sealing ring is fixedly installed at the bottom of the cover plate, and the bottom of the sealing ring is in sliding contact with the top of the rectangular housing.

[0028] Further, the sealing ring is used to fill the gap between the cover plate and the rectangular housing to seal the rectangular housing.

[0029] The present invention also proposes a filtration method for producing polyethylene glycol, including the following steps:

[0030] S1: First, add clear water into the inner side of the rectangular housing through a liquid inlet pipe;

[0031] S2: Then, inject waste gas into the inner side of the rectangular housing through an exhaust pipe;

[0032] S3: The waste gas will first be filtered by clean water to remove impurities, then filtered by the filter plate to remove harmful substances, and finally discharged through the exhaust pipe.

[0033] S4: Push the hollow unlocking frame to replace the filter plate.

[0034] The beneficial effects of the present invention are as follows:

[0035] 1. After inserting the filter screen and the sealing insertion frame into the inner side of the rectangular housing, release the two docking fixing frames, so that the two docking fixing frames can automatically engage with the fixing blocks. The docking fixing frames can connect the sealing insertion frame and the fixing blocks to block the movement of the filter plate and the sealing insertion frame on the fixing blocks, so that the sealing insertion frame cannot be separated from the rectangular housing, realizing the installation of the sealing insertion frame and the filter plate, and enabling the filter plate to be stably located inside the rectangular housing.

[0036] 2. After the hollow unlocking frame is pushed and moved, the hollow unlocking frame can squeeze the two rotating rods to rotate, so that the left ends of the two rotating rods can approach each other. Then, the two supporting positioning frames can be driven to approach each other through the two round blocks, so that the two supporting positioning frames can be separated from the two fixing blocks, realizing the unlocking of the sealing insertion frame and the filter plate, and enabling the sealing insertion frame and the filter plate to be disassembled to replace the filter plate.

[0037] 3. After the supporting positioning frame engages with the fixing plate, the supporting positioning frame can connect the cover plate and the rectangular housing to block the separation of the cover plate from the rectangular housing on the rectangular housing, realizing the installation of the cover plate, and enabling the cover plate to stably seal the rectangular housing.

[0038] 4. When holding the handle and pushing the hollow rotating frame to rotate, the hollow rotating frame can squeeze the supporting positioning frame to disengage from the fixing plate through the round rod, realizing the unlocking of the cover plate, enabling the cover plate to open the rectangular housing, and facilitating the cleaning of the rectangular housing.

[0039] By discharging the waste gas into the inner side of the rectangular housing, the dust in the waste gas will be filtered by the clean water in the rectangular housing, and then the waste gas will be filtered by multiple filter plates on the inner side of the rectangular housing to meet the emission standards, avoiding harm to the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic front view of the structure of a filtering device for producing polyethylene glycol proposed by the present invention;

[0041] Figure 2 It is a schematic front sectional view of the structure of a filtering device for producing polyethylene glycol proposed by the present invention;

[0042] Figure 3 It is a schematic diagram of the structure of a filtering device for producing polyethylene glycol proposed by the present invention;

[0043] Figure 4 Structural attachment of a filtering device for producing polyethylene glycol proposed by the present invention Figure 2 Schematic enlarged view of A in the figure;

[0044] Figure 5 Structural attachment of a filtering device for producing polyethylene glycol proposed by the present invention Figure 2 Schematic enlarged view of B in the figure.

[0045] In the figure: 1, rectangular outer shell; 2, waste gas pipe; 3, waste liquid pipe; 4, liquid inlet pipe; 5, filter plate; 6, sealing insertion frame; 7, sealing ring; 8, cover plate; 9, exhaust pipe; 10, fixing block; 11, docking fixing frame; 12, return spring; 13, rotating rod; 14, holding frame; 15, hollow unlocking frame; 16, fixing plate; 17, support positioning frame; 18, positioning spring; 19, spring seat; 20, hollow rotating frame; 21, handle; 22, round rod; 23, round block. Specific implementation manner

[0046] The present invention will be further explained below with reference to specific embodiments.

[0047] Embodiment

[0048] Reference Figures 1-5 , in this embodiment, a filtering device for producing polyethylene glycol is proposed, including a rectangular outer shell 1, a cover plate 8 is provided at the top of the rectangular outer shell 1, a waste liquid pipe 3 is fixedly installed at the bottom right of the rectangular outer shell 1, a liquid inlet pipe 4 is fixedly installed on the right side of the rectangular outer shell 1, a waste gas pipe 2 is provided on the left side of the rectangular outer shell 1, and an exhaust pipe 9 is fixedly installed at the top of the cover plate 8;

[0049] Three groups of filtering mechanisms and disassembly mechanisms arranged at equal intervals are provided on the right side of the rectangular outer shell 1, the filtering mechanism is matched with the disassembly mechanism, and two groups of sealing mechanisms and unlocking mechanisms are symmetrically arranged at the top of the rectangular outer shell 1, and the sealing mechanisms are respectively matched with the unlocking mechanism and the rectangular outer shell 1.

[0050] By means of the above mechanism: by discharging the waste gas into the inner side of the rectangular outer shell 1, the dust will be filtered out by the clear water in the rectangular outer shell 1, and then the waste gas will be filtered by a plurality of filter plates 5 on the inner side of the rectangular outer shell 1 to meet the emission standard and avoid harm to the health of the staff.

[0051] Preferably, the filtering mechanism includes: a filter plate 5, a sealing insertion frame 6, two fixing blocks 10, two docking fixing frames 11 and a return spring 12;

[0052] The outer side of the filter plate 5 is in sliding contact with the inner wall of the rectangular housing 1. The filter plate 5 is fixedly connected to the sealing insertion frame 6. The sealing insertion frame 6 is in sliding contact with the right side of the rectangular housing 1. The fixed block 10 is fixedly connected to the rectangular housing 1. The docking fixed frame 11 is slidably connected to the sealing insertion frame 6. The return spring 12 is fixedly connected to the two docking fixed frames 11. After inserting the filter screen and the sealing insertion frame 6 into the inner side of the rectangular housing 1, the two docking fixed frames 11 are released, so that the two docking fixed frames 11 can automatically engage with the fixed block 10. The docking fixed frame 11 can connect the sealing insertion frame 6 and the fixed block 10 to block the movement of the filter plate 5 and the sealing insertion frame 6 on the fixed block 10, so that the sealing insertion frame 6 cannot be separated from the rectangular housing 1, realizing the installation of the sealing insertion frame 6 and the filter plate 5, and enabling the filter plate 5 to be stably located inside the rectangular housing 1.

[0053] Preferably, the disassembly mechanism includes: two rotating rods 13, a grip 14 and a hollow unlocking frame 15;

[0054] Both of the two rotating rods 13 are rotatably connected to the grip 14. The grip 14 is fixedly connected to the sealing insertion frame 6. The hollow unlocking frame 15 is in sliding contact with the rotating rods 13. After the hollow unlocking frame 15 is pushed to move, the hollow unlocking frame 15 can squeeze the two rotating rods 13 to rotate, so that the left ends of the two rotating rods 13 can approach each other, and the two supporting positioning frames 17 can be driven to approach each other by the two round blocks 23, so that the two supporting positioning frames 17 can be disengaged from the two fixed blocks 10, realizing the unlocking of the sealing insertion frame 6 and the filter plate 5, and the sealing insertion frame 6 and the filter plate 5 can be disassembled to replace the filter plate 5.

[0055] Preferably, the sealing mechanism includes: a fixing plate 16, a supporting positioning frame 17, a positioning spring 18 and a spring seat 19;

[0056] The fixing plate 16 is fixedly connected to the rectangular housing 1. The supporting positioning frame 17 is slidably connected to the cover plate 8. The supporting positioning frame 17 cooperates with the fixing plate 16. The supporting positioning frame 17 is fixedly connected to the positioning spring 18. The positioning spring 18 is fixedly connected to the spring seat 19. The spring seat 19 is fixedly connected to the cover plate 8. After the supporting positioning frame 17 engages with the fixing plate 16, the supporting positioning frame 17 can connect the cover plate 8 and the rectangular housing 1 to block the cover plate 8 from being separated from the rectangular housing 1 on the rectangular housing 1, realizing the installation of the cover plate 8, and enabling the cover plate 8 to stably seal the rectangular housing 1.

[0057] Preferably, the unlocking mechanism includes: a hollow rotating frame 20 and a handle 21;

[0058] The hollow rotating frame 20 is rotatably connected to the top of the cover plate 8, and the handle 21 is fixedly connected to the cover plate 8. When holding the handle 21, the hollow rotating frame 20 is pushed to rotate, so that the hollow rotating frame 20 can squeeze the support positioning frame 17 away from the fixing plate 16 through the round rod 22, and the unlocking of the cover plate 8 can be realized, so that the cover plate 8 can open the rectangular housing 1, facilitating the cleaning of the rectangular housing 1.

[0059] Preferably, fixing grooves are formed on one side of the two fixing blocks 10 close to each other, insertion blocks are fixedly installed on one side of the two docking fixing frames 11 away from each other, the outer side of the insertion block is in sliding contact with the inner wall of the fixing groove, and round blocks 23 are fixedly installed on the front side of the two docking fixing frames 11. The round block 23 is in sliding contact with the inner wall of the hollow rotating frame 20. After the insertion block is inserted into the inner side of the fixing groove, the positioning of the sealing insertion frame 6 can be realized.

[0060] Preferably, a plurality of positioning grooves arranged at equal intervals are formed on the fixing plate 16, a positioning block is fixedly installed on the support positioning frame 17, the positioning block is in sliding contact with the inner wall of the positioning groove, a round rod 22 is fixedly installed on the front side of the support positioning frame 17, and the round rod 22 is in sliding contact with the inner wall of the hollow rotating frame 20. After the positioning block is inserted into the inner side of the positioning groove, the positioning block can block the movement of the cover plate 8 to realize the positioning of the cover plate 8.

[0061] Preferably, a sealing ring 7 is fixedly installed at the bottom of the cover plate 8, the bottom of the sealing ring 7 is in sliding contact with the top of the rectangular housing 1, and the sealing ring 7 is used to fill the gap between the cover plate 8 and the rectangular housing 1 to seal the rectangular housing 1.

[0062] Working principle: First, add clear water into the inner side of the rectangular housing 1 through the liquid inlet pipe 4, and then inject waste gas into the inner side of the rectangular housing 1 through the waste gas pipe 2. The waste gas will first be filtered by the clear water to remove impurities, and then filtered by the filter plate 5 to remove harmful substances. The filter plate 5 is an activated carbon plate to meet the emission standards. Finally, it is discharged through the exhaust pipe 9 to avoid harming the health of the staff. After treating the waste gas for a long time, the clear water becomes turbid and the filter plate 5 loses its activity. When it needs to be replaced, the waste liquid can be discharged through the waste liquid pipe 3, and then new clear water is added into the inner side of the rectangular housing 1 through the liquid inlet pipe 4. Then, push the three hollow unlocking frames 15 on the three holding frames 14. After the hollow unlocking frames 15 are pushed and moved, the hollow unlocking frames 15 can squeeze the two rotating rods 13 to rotate, so that the left ends of the two rotating rods 13 can approach each other, and then drive the two support positioning frames 17 to approach each other through the two round blocks 23, so that the two support positioning frames 17 can be separated from the two fixed blocks 10, realizing the unlocking of the sealing insertion frame 6 and the filter plate 5, and then the sealing insertion frame 6 and the filter plate 5 can be disassembled to replace the filter plate 5. Then, insert the new filter screen and the sealing insertion frame 6 into the inner side of the rectangular housing 1, and then release the two docking fixing frames 11, so that the two docking fixing frames 11 can automatically engage with the fixed blocks 10, and the docking fixing frames 11 can connect the sealing insertion frame 6 with the fixed blocks 10 to block the movement of the filter plate 5 and the sealing insertion frame 6 on the fixed blocks 10, so that the sealing insertion frame 6 cannot be separated from the rectangular housing 1, realizing the installation of the sealing insertion frame 6 and the filter plate 5, so that the filter plate 5 can be stably located inside the rectangular housing 1 and stably filter the waste gas. If it is necessary to clean the inner side of the rectangular housing 1, only need to push the two hollow rotating frames 20. When holding the handle 21 and pushing the hollow rotating frames 20 to rotate, the hollow rotating frames 20 can squeeze the support positioning frame 17 to be separated from the fixing plate 16 through the round rod 22, realizing the unlocking of the cover plate 8, so that the cover plate 8 can open the rectangular housing 1, which is convenient for cleaning the rectangular housing 1. After cleaning, cover the cover plate 8 on the top of the rectangular housing 1, and then squeeze the sealing ring 7 downward, so that the sealing ring 7 can continuously fill the gap between the cover plate 8 and the rectangular housing 1 to seal the rectangular housing 1. At this time, the support positioning frame 17 can automatically engage with the fixing plate 16. After the support positioning frame 17 engages with the fixing plate 16, the support positioning frame 17 can connect the cover plate 8 and the rectangular housing 1 to block the cover plate 8 from being separated from the rectangular housing 1 on the rectangular housing 1, realizing the installation of the cover plate 8, so that the cover plate 8 can stably seal the rectangular housing 1, and then continue to treat the waste gas.

[0063] The present invention also proposes a filtration method for producing polyethylene glycol, including the following steps:

[0064] S1: First, add clear water into the inner side of the rectangular housing 1 through the liquid inlet pipe 4;

[0065] S2: Then, the exhaust gas is sent into the inner side of the rectangular housing 1 through the exhaust pipe 2;

[0066] S3: The exhaust gas is first filtered by clean water to remove impurities, then filtered by the filter plate 5 to remove harmful substances, and finally discharged through the exhaust pipe 9;

[0067] S4: Push the hollow unlocking frame 15 to replace the filter plate 5.

[0068] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A filtering device for producing polyethylene glycol, comprising a rectangular outer shell (1), characterized in that, A cover plate (8) is provided at the top of the rectangular housing (1). A waste liquid pipe (3) is fixedly installed at the bottom right of the rectangular housing (1). A liquid inlet pipe (4) is fixedly installed on the right side of the rectangular housing (1). An exhaust gas pipe (2) is provided on the left side of the rectangular housing (1). An exhaust pipe (9) is fixedly installed at the top of the cover plate (8). Three groups of filtering mechanisms and disassembly mechanisms arranged at equal intervals are provided on the right side of the rectangular housing (1). The filtering mechanism is matched with the disassembly mechanism. Two groups of sealing mechanisms and unlocking mechanisms are symmetrically arranged on the top of the rectangular housing (1). The sealing mechanisms are respectively matched with the unlocking mechanism and the rectangular housing (1).

2. The filtration device for producing polyethylene glycol according to claim 1, wherein, The filtering mechanism includes: a filter plate (5), a sealing insertion frame (6), two fixing blocks (10), two docking fixing frames (11) and a return spring (12). The outer side of the filter plate (5) is in sliding contact with the inner wall of the rectangular housing (1). The filter plate (5) is fixedly connected to the sealing insertion frame (6). The sealing insertion frame (6) is in sliding contact with the right side of the rectangular housing (1). The fixing blocks (10) are fixedly connected to the rectangular housing (1). The docking fixing frames (11) are slidably connected to the sealing insertion frame (6). The return spring (12) is fixedly connected to the two docking fixing frames (11).

3. A filtration device for producing polyethylene glycol according to claim 1, characterized in that, The disassembly mechanism includes: two rotating rods (13), a grip (14) and a hollow unlocking frame (15). Both of the two rotating rods (13) are rotatably connected to the grip (14). The grip (14) is fixedly connected to the sealing insertion frame (6). The hollow unlocking frame (15) is in sliding contact with the rotating rod (13).

4. A filtration device for producing polyethylene glycol according to claim 1, characterized in that, The sealing mechanism includes: a fixing plate (16), a support positioning frame (17), a positioning spring (18) and a spring seat (19). The fixing plate (16) is fixedly connected to the rectangular housing (1). The support positioning frame (17) is slidably connected to the cover plate (8). The support positioning frame (17) is matched with the fixing plate (16). The support positioning frame (17) is fixedly connected to the positioning spring (18). The positioning spring (18) is fixedly connected to the spring seat (19). The spring seat (19) is fixedly connected to the cover plate (8).

5. A filtration device for producing polyethylene glycol according to claim 1, characterized in that, The unlocking mechanism includes: a hollow rotating frame (20) and a handle (14). The hollow rotating frame (20) is rotatably connected to the top of the cover plate (8). The handle (14) is fixedly connected to the cover plate (8).

6. The filtration device for producing polyethylene glycol according to claim 2, wherein, Fixing grooves are formed on the inner sides of the two fixing blocks (10) close to each other. Insertion blocks are fixedly installed on the outer sides of the two docking fixing frames (11) away from each other. The outer sides of the insertion blocks are in sliding contact with the inner walls of the fixing grooves. Round blocks (23) are fixedly installed on the front sides of the two docking fixing frames (11). The round blocks (23) are in sliding contact with the inner wall of the hollow rotating frame (20).

7. A filtration device for producing polyethylene glycol according to claim 4, characterized in that, A plurality of positioning grooves arranged at equal intervals are formed on the fixing plate (16). A positioning block is fixedly installed on the support positioning frame (17). The positioning block is in sliding contact with the inner wall of the positioning groove. A round rod (22) is fixedly installed on the front side of the support positioning frame (17). The round rod (22) is in sliding contact with the inner wall of the hollow rotating frame (20).

8. A filtration device for producing polyethylene glycol according to claim 1, characterized in that, A sealing ring (7) is fixedly installed at the bottom of the cover plate (8), and the bottom of the sealing ring (7) is in sliding contact with the top of the rectangular housing (1).

9. A filtration method for producing polyethylene glycol, characterized in that, It includes the following steps: S1: First, add clear water into the inner side of the rectangular housing (1) through the liquid inlet pipe (4); S2: Then, inject the waste gas into the inner side of the rectangular housing (1) through the waste gas pipe (2); S3: The waste gas will first be filtered out impurities by the clear water, then filtered out harmful substances by the filter plate (5), and finally discharged through the exhaust pipe (9); S4: Push the hollow unlocking frame (15) to replace the filter plate (5).

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