Device for removing PVC particle floating objects in mother liquor

Abstract

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a device for removing PVC (polyvinyl chloride) particle floaters in mother liquor, which comprises a process tank and a sedimentation tank, a wastewater tank and a reflux tank are respectively arranged on the left side and the right side in the process tank, and the sedimentation tank is arranged on the front side of the process tank. According to the device disclosed by the utility model, polymerization wastewater is fed into the sedimentation tank through the wastewater conveying pump I, is subjected to stepped sedimentation through matching of the partition plate I, the partition plate II and the partition plate III which are different in height in the sedimentation tank, and then flows back to the backflow tank to be conveyed to a subsequent process, so that large PVC particle floaters in mother liquor are removed; fine PVC particles which are difficult to settle on the surface of the mother liquor in the settling tank are adsorbed and collected, so that the removal rate of PVC particle floating objects in the mother liquor is increased.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a device for removing PVC particles floating in mother liquor water. Background Technology

[0002] Acetylene is an important chemical raw material widely used in organic synthesis, welding, and cutting. Acetylene production typically employs either calcium carbide hydrolysis or hydrocarbon cracking. The calcium carbide hydrolysis method involves reacting calcium carbide with water to produce acetylene gas and a mother liquor containing numerous byproducts. This mother liquor contains unreacted calcium carbide powder, calcium hydroxide, and other impurities, particularly suspended solids such as polyvinyl chloride (PVC) particles. The treatment of this mother liquor is a critical step in the acetylene production process. Direct discharge of untreated mother liquor not only causes severe environmental pollution but also leads to equipment blockage and reduced efficiency in subsequent water treatment systems.

[0003] Existing devices for removing PVC particles from mother liquor include sedimentation tanks using gravity sedimentation. While these can remove larger PVC particles, smaller PVC particles in the mother liquor are difficult to settle because they are adsorbed with microbubbles. To enable these devices to remove smaller PVC particles, we propose a device for removing PVC particles from mother liquor. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a device for removing PVC particles floating in mother liquor. Polymerization wastewater is pumped into a settling tank via a wastewater transfer pump. After step-like settling by three partitions of varying heights within the settling tank, the wastewater is returned to a return tank for subsequent processes. This process removes larger PVC particles from the mother liquor. Furthermore, a suction assembly installed at the top of the settling tank adsorbs and collects smaller PVC particles that are difficult to settle on the surface of the mother liquor, thereby improving the removal rate of PVC particles floating in the mother liquor and solving the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A device for removing floating PVC particles from mother liquor water, comprising a process tank and a sedimentation tank, characterized in that: a wastewater tank and a return tank are respectively arranged on the left and right sides of the process tank, the sedimentation tank is arranged on the front side of the process tank, and a partition plate 1, a partition plate 2 and a partition plate 3 are fixedly connected from left to right inside the sedimentation tank, a wastewater transfer pump 1 and a wastewater transfer pump 2 are respectively arranged on the left and right sides of the sedimentation tank, and an inlet and an outlet are respectively opened on the top of the left and right sides of the sedimentation tank;

[0006] The input end of the first wastewater transfer pump is fixedly connected to the wastewater pool via a pipe, and the output end of the first wastewater transfer pump is fixedly connected to an inlet pipe. The output end of the inlet pipe is fixedly connected to an inlet. The output end of the second wastewater transfer pump is fixedly connected to a return pool via a pipe, and the input end of the second wastewater transfer pump is fixedly connected to a return pipe. The input end of the return pipe is fixedly connected to an outlet. A third wastewater transfer pump is installed on the right side of the return pool. The input end of the third wastewater transfer pump is fixedly connected to the return pool via a pipe, and the output end of the third wastewater transfer pump is fixedly connected to an outlet pipe. A material suction assembly is also installed on the top of the sedimentation tank.

[0007] Preferably, the suction assembly includes a mounting frame, a threaded rod is rotatably mounted on the top front side of the sedimentation tank, a limit rod is fixedly mounted on the top rear side of the sedimentation tank, and the front part of the mounting frame is threaded onto the threaded rod.

[0008] Preferably, the rear part of the mounting bracket is slidably sleeved on the limiting rod, and a drive motor is fixedly installed on the left front side of the sedimentation tank. The output shaft end of the drive motor is fixedly connected to the left end of the threaded rod.

[0009] Preferably, a suction cylinder is provided on the bottom side of the mounting frame, and a limiting rod two is fixedly connected to the front and rear sides of the top of the suction cylinder. The limiting rod two slides through the mounting frame. A threaded rod two is rotatably installed in the middle of the top side of the suction cylinder, and the threaded rod two is also threaded through the mounting frame. A knob is fixedly connected to the top of the threaded rod two. A scraping mechanism is also installed on the suction cylinder, and a collection mechanism is provided on the right side of the sedimentation tank.

[0010] Preferably, the scraping mechanism includes a second drive motor, which is fixedly installed on the top rear side of the suction cylinder. A rotating rod is rotatably connected between the front and rear sides of the suction cylinder. Several scraping plates are fixedly sleeved on the rotating rod. Pulleys are fixedly connected to the output shaft end of the second drive motor and the rear end of the rotating rod. A belt is tensioned between the two sets of pulleys.

[0011] Preferably, the collection mechanism includes a filter box and a blower. The filter box is located on the right side of the sedimentation tank, and the blower is located on the right side of the filter box. A collection chamber is provided in the upper left corner of the filter box. Several filter holes are provided through the right and bottom sides of the collection chamber. A connecting pipe is fixedly connected to the top left side of the filter box.

[0012] Preferably, the top of the suction cylinder is provided with several suction ports, and the suction ports are all fixedly connected to the connecting pipe through pipes. The input end of the blower is fixedly connected to the right side of the filter box through a pipe. The upper left corner of the front side of the filter box is provided with a discharge door, and the bottom of the front side of the filter box is provided with a drain outlet.

[0013] Preferably, the bottom front side of the sedimentation tank is provided with several manhole doors.

[0014] Preferably, an inspection ladder is provided on the left side of the sedimentation tank.

[0015] Preferably, a branch pipe is fixedly connected between the water inlet pipe and the return pipe.

[0016] This invention provides a device for removing floating PVC particles from mother liquor. Compared with the prior art, it has the following advantages:

[0017] This device for removing PVC particles floating in mother liquor involves pumping polymer wastewater into a settling tank via a wastewater transfer pump. The wastewater undergoes stepped settling through three partitions of varying heights within the settling tank. After settling, the wastewater is returned to a return tank for subsequent processing. This process removes larger PVC particles from the mother liquor. Furthermore, a suction assembly installed at the top of the settling tank adsorbs and collects smaller PVC particles that are difficult to settle on the surface of the mother liquor, thereby improving the removal rate of PVC particles floating in the mother liquor. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0019] Figure 2 This is a top view of the main structure of the present invention;

[0020] Figure 3 This is a top view schematic diagram of the sedimentation tank structure of this utility model;

[0021] Figure 4 This is a front view cross-sectional structural diagram of the sedimentation tank of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the suction cylinder of this utility model;

[0023] Figure 6 This is a schematic diagram of the internal structure of the filter box of this utility model.

[0024] In the diagram: 1. Process tank; 2. Wastewater tank; 3. Return tank; 4. Sedimentation tank; 5. Manhole; 6. Maintenance ladder; 7. Wastewater transfer pump one; 8. Wastewater transfer pump two; 9. Wastewater transfer pump three; 10. Inlet pipe; 11. Return pipe; 12. Branch pipe; 13. Outlet pipe; 14. Inlet; 15. Outlet; 16. Drive motor one; 17. Threaded rod one; 18. Limiting rod one; 19. Connecting pipe; 20. Filter box; 21. Discharge door; 22. Drain outlet; 23. Partition 1; 24. Partition 2; 25. Partition 3; 26. Suction port; 27. Mounting bracket; 28. Limiting rod 2; 29. ​​Suction cylinder; 30. Threaded rod 2; 31. Knob; 32. Drive motor 2; 33. Belt; 34. Pulley; 35. Rotating rod; 36. Scraper; 37. Fan; 38. Collection chamber; 39. Filter holes. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 This utility model provides a technical solution: a device for removing PVC particles floating in mother liquor water, including a process tank 1 and a sedimentation tank 4. Wastewater tank 2 and return tank 3 are respectively arranged on the left and right sides of the process tank 1. The sedimentation tank 4 is arranged in front of the process tank 1. The sedimentation tank 4 is fixedly connected from left to right with partition 1 23, partition 24 and partition 3 25. Wastewater transfer pump 1 7 and wastewater transfer pump 2 8 are respectively arranged on the left and right sides of the sedimentation tank 4. The top of the left and right sides of the sedimentation tank 4 is respectively provided with water inlet 14 and water outlet 15. The input end of wastewater transfer pump 1 7 is fixedly connected to wastewater tank 2 through a pipe.

[0027] Wastewater transfer pump 7 is fixedly connected to an inlet pipe 10 at its output end, and the output end of the inlet pipe 10 is fixedly connected to an inlet 14. Wastewater transfer pump 8 is fixedly connected to a return tank 3 via a pipe, and the input end of wastewater transfer pump 8 is fixedly connected to a return pipe 11. The input end of the return pipe 11 is fixedly connected to an outlet 15. Wastewater transfer pump 9 is installed on the right side of the return tank 3. The input end of wastewater transfer pump 9 is fixedly connected to the return tank 3 via a pipe, and the output end of wastewater transfer pump 9 is fixedly connected to an outlet pipe 13. A material suction assembly is also installed on the top of the sedimentation tank 4.

[0028] When the device for removing PVC particles floating in mother liquor is in use, the mother liquor in the wastewater tank 2 on the left side of the process tank 1 is transported to the inlet pipe 10 by the wastewater transfer pump 7. Then, the mother liquor enters the settling tank 4 from the inlet 14 for settling treatment. The settling tank 4 is fixedly connected from left to right by partition 1 23, partition 24 and partition 3 25. The height of partition 1 23, partition 24 and partition 3 25 decreases from left to right, so as to perform step settling treatment for PVC particles floating in the mother liquor. In addition, a suction component is installed at the top of the settling tank 4 to adsorb and collect small PVC particles floating in the mother liquor that are difficult to settle in the settling tank 4. The treated wastewater enters the return pipe 11 through the outlet 15 and is transported to the return tank 3 on the right side of the process tank 1 by the wastewater transfer pump 2 8. The mother liquor in the return tank 3 is transported to the outlet pipe 13 by the wastewater transfer pump 3 9, so as to enter the next process.

[0029] The suction assembly includes a mounting frame 27. A threaded rod 17 is rotatably mounted on the top front side of the settling tank 4. A limiting rod 18 is fixedly mounted on the top rear side of the settling tank 4. The front part of the mounting frame 27 is threaded onto the threaded rod 17, and the rear part of the mounting frame 27 is slidably mounted onto the limiting rod 18. A drive motor 16 is fixedly mounted on the front left side of the settling tank 4. The output shaft end of the drive motor 16 is fixedly connected to the left end of the threaded rod 17. A suction cylinder 29 is provided on the bottom side of the mounting frame 27. A limiting rod 28 is fixedly connected to the front and rear sides of the top of the suction cylinder 29. The limiting rod 28 slides through the mounting frame 27. A threaded rod 30 is rotatably mounted on the middle top side of the suction cylinder 29, and the threaded rod 30 is also threaded through the mounting frame 27. A knob 31 is fixedly connected to the top of the threaded rod 30. A scraping mechanism is also installed on the suction cylinder 29. A collection mechanism is also provided on the right side of the settling tank 4.

[0030] The scraping mechanism includes a second drive motor 32, which is fixedly installed on the top rear side of the suction cylinder 29. A rotating rod 35 is rotatably connected between the front and rear sides of the suction cylinder 29. Several scraping plates 36 are fixedly sleeved on the rotating rod 35. Pulleys 34 are fixedly connected to the output shaft end of the second drive motor 32 and the rear end of the rotating rod 35. A belt 33 is tensioned and sleeved between the two sets of pulleys 34.

[0031] The collection mechanism includes a filter box 20 and a blower 37. The filter box 20 is located on the right side of the sedimentation tank 4, and the blower 37 is located on the right side of the filter box 20. A collection chamber 38 is located in the upper left corner of the interior of the filter box 20. Several filter holes 39 are opened through the right side and bottom side of the collection chamber 38. A connecting pipe 19 is fixedly connected to the top left side of the filter box 20. Several suction ports 26 are opened at the top of the suction cylinder 29. Several suction ports 26 are fixedly connected to the connecting pipe 19 through pipes. The input end of the blower 37 is fixedly connected to the right side of the filter box 20 through a pipe. A discharge door 21 is located in the upper left corner of the front side of the filter box 20, and a drain outlet 22 is located in the bottom front side of the filter box 20.

[0032] When using the suction assembly, first start the drive motor 32. Since the output shaft of the drive motor 32 and the rear end of the rotating rod 35 are both fixedly connected to the pulley 34, the belt 33 is tensioned and connected to rotate the rotating rod 35. The rotating rod 35 is rotated, and the scraper blades 36 fixedly connected to the rotating rod 35 scrape up the fine PVC particles floating on the surface of the settling tank 4. Then start the blower 37. The blower 37 creates a negative pressure inside the filter box 20. The negative pressure air passes through the connecting pipe 19 and sucks the PVC particles scraped up by the scraper blades 36 into the connecting pipe 19 through the several suction ports 26 opened at the top of the suction cylinder 29, thus entering the interior of the filter box 20. The collection chamber 38 in the upper corner collects the contents. Then, the drive motor 16 is started, which rotates the threaded rod 17. This causes the mounting bracket 27, which is threaded onto the threaded rod 17, to move left and right on the limiting rod 18. The mounting bracket 27, through the threaded rod 30 and the two sets of limiting rods 28, drives the suction cylinder 29 to move left and right, thereby adsorbing the PVC particles floating on the surface of the mother liquor in the sedimentation tank 4 over a wide area. By rotating the knob 31, the threaded rod 30 is rotated on the mounting bracket 27, causing the suction cylinder 29 to rise and fall on the limiting rods 28 to adapt to different liquid levels inside the sedimentation tank 4.

[0033] Several manhole doors 5 are provided at the bottom front side of the settling tank 4, which facilitates the cleaning of PVC particles that have settled and accumulated inside the settling tank 4.

[0034] A maintenance ladder 6 is provided on the left side of the settling tank 4 to facilitate the adjustment of the threaded rod 30 and the maintenance of the top mechanism of the settling tank 4.

[0035] A branch pipe 12 is also fixedly connected between the inlet pipe 10 and the return pipe 11. When there are no PVC particles floating in the mother liquor, the mother liquor in the wastewater tank 2 is transported to the return tank 3 through the branch pipe 12.

[0036] Working principle: When this device for removing PVC particles floating in mother liquor is in use, the mother liquor in the wastewater tank 2 on the left side of the process tank 1 is transported to the inlet pipe 10 by the wastewater transfer pump 7. Then the mother liquor enters the sedimentation tank 4 from the inlet 14 for sedimentation treatment. The sedimentation tank 4 is fixedly connected from left to right with partition 1 23, partition 24 and partition 3 25. The height of partition 1 23, partition 24 and partition 3 25 decreases from left to right, so as to perform step sedimentation treatment on the PVC particles floating in the mother liquor. At the same time, the drive motor 2 32 is started. Since the output shaft end of the drive motor 2 32 and the rear end of the rotating rod 35 are both fixedly connected to the pulley 34;

[0037] The belt 33 is tensioned, causing the rotating rod 35 to rotate. Several scraper blades 36 fixedly attached to the rotating rod 35 scrape up fine PVC particles floating on the surface of the settling tank 4. Then, the blower 37 is started, creating negative pressure inside the filter box 20. This negative pressure air flows through the connecting pipe 19, drawing the PVC particles scraped up by the scraper blades 36 into the connecting pipe 19 through several suction ports 26 at the top of the suction cylinder 29. The particles then enter the collection chamber 38 located in the upper left corner of the filter box 20 for collection. Finally, the drive motor 16 is started... The drive motor 16 rotates the threaded rod 17, causing the mounting bracket 27, which is threaded onto the threaded rod 17, to move left and right on the limiting rod 18. The mounting bracket 27 drives the suction cylinder 29 to move left and right through the threaded rod 30 and the two sets of limiting rods 28, thereby adsorbing and collecting PVC particles floating on the surface of the mother liquor in the sedimentation tank 4 over a wide area. By rotating the knob 31, the threaded rod 30 is driven to rotate on the mounting bracket 27, thereby causing the suction cylinder 29 to rise and fall on the limiting rods 28 to adapt to different liquid levels inside the sedimentation tank 4.

[0038] The treated wastewater enters the return pipe 11 through the outlet 15 and is then transported to the return tank 3 on the right side of the process tank 1 by the wastewater transfer pump 2 8. The mother liquor in the return tank 3 is then transported to the outlet pipe 13 by the wastewater transfer pump 3 9, thus entering the next process.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for removing floating PVC particles from mother liquor, comprising a process tank (1) and a settling tank (4), characterized in that: Wastewater pool (2) and return pool (3) are respectively provided on the left and right sides of the process pool (1). The sedimentation pool (4) is located on the front side of the process pool (1). The sedimentation pool (4) is fixedly connected from left to right with partition 1 (23), partition 2 (24) and partition 3 (25). Wastewater transfer pump 1 (7) and wastewater transfer pump 2 (8) are respectively provided on the left and right sides of the sedimentation pool (4). The top of the left and right sides of the sedimentation pool (4) is provided with water inlet (14) and water outlet (15) respectively. The input end of the wastewater transfer pump 1 (7) is fixedly connected to the wastewater pool (2) through a pipe. The output end of the wastewater transfer pump 1 (7) is fixedly connected to the inlet pipe (10). The output end of the inlet pipe (10) is fixedly connected to the inlet (14). The output end of the wastewater transfer pump 2 (8) is fixedly connected to the return pool (3) through a pipe. The input end of the wastewater transfer pump 2 (8) is fixedly connected to the return pipe (11). The input end of the return pipe (11) is fixedly connected to the outlet (15). A wastewater transfer pump 3 (9) is set on the right side of the return pool (3). The input end of the wastewater transfer pump 3 (9) is fixedly connected to the return pool (3) through a pipe. The output end of the wastewater transfer pump 3 (9) is fixedly connected to the outlet pipe (13). A material suction assembly is also installed on the top of the sedimentation pool (4).

2. The device for removing PVC particles from mother liquor water according to claim 1, characterized in that: The suction assembly includes a mounting frame (27), a threaded rod (17) is rotatably mounted on the top front side of the settling tank (4), a limit rod (18) is fixedly mounted on the top rear side of the settling tank (4), and the front part of the mounting frame (27) is threaded onto the threaded rod (17).

3. The apparatus for removing PVC particles from mother liquor water according to claim 2, characterized in that: The rear part of the mounting bracket (27) is slidably sleeved on the limiting rod (18), and the left front side of the sedimentation tank (4) is fixedly installed with a drive motor (16), and the output shaft end of the drive motor (16) is fixedly connected to the left end of the threaded rod (17).

4. The apparatus for removing PVC particles floating in mother liquor water according to claim 3, characterized in that: The bottom side of the mounting frame (27) is provided with a suction cylinder (29). The front and rear sides of the top of the suction cylinder (29) are respectively fixedly connected with limit rods (28). The limit rods (28) slide through the mounting frame (27). The top side of the suction cylinder (29) is rotatably installed with a threaded rod (30), and the threaded rod (30) is also threaded through the mounting frame (27). The top of the threaded rod (30) is fixedly connected with a knob (31). The suction cylinder (29) is also equipped with a scraping mechanism. The right side of the sedimentation tank (4) is also provided with a collection mechanism.

5. The apparatus for removing PVC particles from mother liquor water according to claim 4, characterized in that: The scraping mechanism includes a second drive motor (32), which is fixedly installed on the top rear side of the suction cylinder (29). A rotating rod (35) is rotatably connected between the front and rear sides of the suction cylinder (29). Several scraping plates (36) are fixedly sleeved on the rotating rod (35). The output shaft end of the second drive motor (32) and the rear end of the rotating rod (35) are both fixedly connected to pulleys (34). A belt (33) is tensioned and sleeved between the two sets of pulleys (34).

6. The apparatus for removing PVC particles from mother liquor water according to claim 4, characterized in that: The collection mechanism includes a filter box (20) and a blower (37). The filter box (20) is located on the right side of the sedimentation tank (4), and the blower (37) is located on the right side of the filter box (20). A collection chamber (38) is provided in the upper left corner of the filter box (20). Several filter holes (39) are provided through the right side and bottom side of the collection chamber (38). A connecting pipe (19) is fixedly connected to the top left side of the filter box (20).

7. The apparatus for removing PVC particles from mother liquor water according to claim 6, characterized in that: The top of the suction cylinder (29) is provided with several suction ports (26), and the suction ports (26) are all fixedly connected to the connecting pipe (19) through pipes. The input end of the blower (37) is fixedly connected to the right side of the filter box (20) through pipes. The upper left corner of the front side of the filter box (20) is provided with a discharge door (21), and the bottom front side of the filter box (20) is provided with a drain outlet (22).

8. The apparatus for removing PVC particles from mother liquor water according to claim 1, characterized in that: Several manhole doors (5) are provided at the bottom front side of the sedimentation tank (4).

9. The apparatus for removing PVC particles from mother liquor water according to claim 1, characterized in that: A maintenance ladder (6) is provided on the left side of the sedimentation tank (4).

10. The apparatus for removing PVC particles from mother liquor water according to claim 1, characterized in that: A branch pipe (12) is also fixedly connected between the water inlet pipe (10) and the return pipe (11).

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