A propylene oxide production wastewater advanced purification recycling system

Abstract

This invention provides a deep purification and reuse system for propylene oxide production wastewater, relating to the field of wastewater purification technology. The system includes: a housing with a collection box fixed to its side; a filter plate movably installed inside the collection box, the filter plate having slots; a positioning column fixed to the inner wall of the housing; a support assembly movably installed on the positioning column; and a limiting seat movably installed on the top of the housing. This invention adds wastewater and chemical reagents into an inner cylinder, with water flowing outwards through openings on the side of the inner cylinder. The flow rate is controlled to prolong the residence time of the wastewater inside the inner cylinder. Later, the rotation of a stirring rod accelerates the outward discharge of wastewater and rapidly mixes the wastewater and chemical reagents. The wastewater is simultaneously squeezed outwards through the openings and undergoes further collision and mixing, thereby effectively improving the uniformity of the mixing between the chemical reagents and wastewater.

Description

Technical Field

[0001] This disclosure relates to the field of wastewater purification technology, and in particular to a deep purification and reuse system for propylene oxide production wastewater. Background Technology

[0002] Wastewater treatment involves purifying wastewater and impurities generated during the production of propylene oxide using physical and chemical methods to reduce pollution. With technological advancements, wastewater treatment methods have improved, including micro-electrolysis. However, currently, wastewater flows in through pumping pipes, and the excessively fast flow rate causes unpurified wastewater to be pushed and discharged, mixing with previously treated water and causing pollution when discharged.

[0003] According to patent document CN118545792A, a method and apparatus for treating propylene oxide wastewater includes a gas distillation column, a compressor, a reboiler, and a phase separation tank. The distillation column is used for the distillation of propylene oxide wastewater mixed with an azeotropic agent to form a first gas phase and a first liquid phase. The top of the distillation column has a gas phase outlet to separate the first gas phase. The gas phase outlet is connected to the inlet of the compressor so that the first gas phase enters the compressor for heating and pressurization, forming a second gas phase. The bottom of the distillation column has a first liquid phase outlet to separate the first liquid phase. The first liquid phase outlet is connected to the refrigerant inlet of the reboiler so that a first portion of the first liquid phase enters the reboiler as refrigerant for heat exchange and heating. The refrigerant outlet of the reboiler is connected to the reboiler inlet of the distillation column. The first liquid phase after heat exchange and heating is returned to the distillation column; the bottom section of the distillation column is provided with a second liquid phase outlet; the second part of the first liquid phase is discharged as concentrated wastewater through the second liquid phase outlet. In use, this technical solution uses a heat pump azeotropic distillation method to treat propylene oxide wastewater. The gas phase taken from the top of the distillation column is compressed and used as the heat medium for the reboiler. During normal operation, no additional fresh steam is required. Compared with the traditional azeotropic distillation method, it saves a lot of circulating water and fresh steam consumption and improves energy utilization efficiency. Regarding the above technical solution, although it improves utilization efficiency, it is inconvenient to use because the flow rate cannot be controlled during the initial water intake, the drainage position cannot be changed, and the wastewater cannot be agitated again. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this disclosure is to provide a deep purification and reuse system for propylene oxide production wastewater.

[0006] To achieve the above objectives, this disclosure provides a deep purification and reuse system for propylene oxide production wastewater, comprising: a housing, a collection box fixed to the side of the housing, a filter plate movably installed inside the collection box, the filter plate having slots, a positioning column fixed to the inner wall of the housing, a support assembly movably installed on the positioning column, and a limiting seat movably installed on the top of the housing; a support assembly, comprising a fixed base, fixing frames welded to both ends of the fixed base, fixing holes on the fixed base, a purification component movably installed inside the fixing holes, and a support frame welded to one side of the fixing frame; and a purification component, comprising a base, a barrel fixedly installed on the base, a ring seat and a reinforcing plate fixed to the side of the barrel, one end of the reinforcing plate fixed to the bottom of the ring seat, support rods welded to the inner wall of the barrel, and an inner cylinder fixedly installed between the support rods.

[0007] Optionally, a fixing pipe is fixed to one end of the collection box, a drain pipe is fixedly installed to one end of the fixing pipe, and one end of the drain pipe is fixedly installed on the box body. A slider is welded to the top of the box body, and a sliding groove is opened at the bottom of the limiting seat.

[0008] Optionally, a movable seat is welded to one end of the support frame, the movable seat is movably mounted on the filter plate, the limiting seat is movably mounted on the top of the movable seat, a threaded column is rotatably mounted on the support frame, a handle is fixed to one end of the threaded column, and a limiting plate is rotatably mounted on the other end of the threaded column.

[0009] Optionally, a liquid inlet hopper is fixed to the top of the inner cylinder, an opening is formed on the inner cylinder, a drain pipe and a water inlet pipe are fixedly installed on the sides of the ring seat, and an annular groove is formed inside the ring seat.

[0010] Optionally, a drive motor and a support tube are fixedly installed at the bottom of the base, a fixed column is welded to the side of the support tube, a rotating column is installed on the drive motor, and the rotating column is rotatably installed inside the barrel.

[0011] Optionally, a rotating seat is movably mounted on the rotating column, a toggle plate is welded onto the rotating seat, a limit groove is opened on the side wall of the rotating column, and a reset mechanism is fixedly installed inside the limit groove.

[0012] Optionally, a limit block is fixed at one end of the reset mechanism, the side of the limit block is welded to the rotating seat, and the rotating seat is movably installed on the side of the limit groove.

[0013] Optionally, a support column is welded to the top of the rotating column, and a stirring rod is welded to the support column. The stirring rod is rotatably installed inside the inner cylinder.

[0014] Optionally, the inside of the barrel has a cavity, and the inner wall of the cavity has a water inlet hole. One end of the support tube is fixedly installed inside the cavity.

[0015] Optionally, a support mechanism is fixed on the inner wall of the slide groove, one end of which is fixedly mounted on the slider, and the slider is movably mounted inside the slide groove.

[0016] The technical solution provided in this disclosure may include the following beneficial effects: 1. This invention adds sewage and chemical reagents into the inner cylinder, with water flowing out through openings on the side of the inner cylinder. The flow rate is controlled to prolong the residence time of sewage inside the inner cylinder. Later, the rotation of the stirring rod accelerates the discharge of sewage and also rapidly mixes the sewage and chemical reagents. While the sewage is squeezed out through the openings, it is also collided and mixed again, thereby effectively improving the uniformity of the mixing between chemical reagents and sewage. 2. In this invention, the wastewater is discharged downwards and falls onto the rotating seat. The rotating seat moves downwards due to the gravity of the wastewater. The drive motor drives the rotating seat to rotate. The rotating seat generates centrifugal force through the lever, which throws the wastewater to the inlet hole. The wastewater enters the cavity through the inlet hole. The centrifugal force accelerates the discharge of wastewater. The wastewater is discharged outwards through the support pipe. When the tank is moved later, the position of the discharge point of the support pipe is changed. In addition, the movement of the support pipe causes the fixed column to perform secondary stirring and mixing of the wastewater inside the tank. 3. In this invention, the barrel is mounted on a fixed seat via a base, and the fixed seat is slidably mounted on a positioning column via a fixing frame. The movable seat is movably mounted on the filter plate. The movable seat presses downward to limit and fix the filter plate. Later, the movable seat moves horizontally to clean the surface of the filter plate by scraping it. After the movable seat is installed inside the collection box, the limiting seat moves horizontally to fix the movable seat vertically. While the movable seat moves horizontally to scrape the filter plate, the threaded rod rotates to adjust the position of the limiting plate. The position and distance of the barrel movement are adjusted by the limiting plate to avoid the impact caused by the collision between the support tube and the box.

[0017] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall structure of a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure; Figure 2This is a schematic diagram of the structure of a deep purification and reuse system for propylene oxide production wastewater after the purification components have been removed, according to an embodiment of this disclosure. Figure 3 This is a schematic diagram of the structure of a deep purification and reuse system for propylene oxide production wastewater after the movable seat has been removed, according to an embodiment of this disclosure. Figure 4 This is a magnified structural diagram of point A in a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of a support component in a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure; Figure 6 This is a schematic diagram of the structure of a purification component in a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure; Figure 7 This is a schematic diagram of the structure of a barrel cut open in a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure; Figure 8 This is a schematic diagram of the bottom structure of a base in a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure; Figure 9 This is a schematic diagram of the structure of a support column in a deep purification and reuse system for propylene oxide production wastewater according to an embodiment of this disclosure.

[0019] As shown in the figure: 1. Box body; 2. Collection box; 3. Filter plate; 4. Limiting seat; 5. Positioning column; 6. Support assembly; 7. Purification assembly; 8. Fixing pipe; 9. Drainage pipe; 10. Slider; 11. Support mechanism; 12. Slot; 13. Fixing seat; 14. Fixing hole; 15. Fixing frame; 16. Support frame; 17. Movable seat; 18. Threaded column; 19. Limiting plate; 20. Handle; 21. Base; 22. Barrel body; 23. 24. Reinforcing plate; 25. Ring seat; 26. Sewage pipe; 27. Support rod; 28. Inner cylinder; 29. ​​Liquid inlet hopper; 30. Support pipe; 31. Fixed column; 32. Opening; 33. Rotating seat; 34. Actuating plate; 35. Ring groove; 36. Cavity; 37. Water inlet hole; 38. Rotating column; 39. Limiting groove; 40. Reset mechanism; 41. Water inlet pipe; 42. Drive motor; 43. Limiting block; 44. Support column; 55. Stirring rod. Detailed Implementation

[0020] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0021] like Figures 1 to 9 As shown, a deep purification and reuse system for propylene oxide production wastewater includes: a housing 1, a collection box 2 fixed to the side of the housing 1, a filter plate 3 movably installed inside the collection box 2, the filter plate 3 having a slot 12, a positioning column 5 fixed to the inner wall of the housing 1, a support assembly 6 movably installed on the positioning column 5, and a limiting seat 4 movably installed on the top of the housing 1; the support assembly 6 includes a fixing seat 13, fixing brackets 15 welded to both ends of the fixing seat 13, fixing holes 14 opened on the fixing seat 13, a purification assembly 7 movably installed inside the fixing holes 14, and a fixing bracket 15 welded to one side of the fixing bracket 15. Support frame 16; purification component 7, the purification component 7 includes base 21, on which a barrel 22 is fixedly installed, a ring seat 24 and a reinforcing plate 23 are fixed to the side of the barrel 22, one end of the reinforcing plate 23 is fixed to the bottom of the ring seat 24, a support rod 26 is welded to the inner wall of the barrel 22, and an inner cylinder 27 is fixedly installed between the support rods 26. The limiting seat 4 moves outward under the push of the support mechanism 11. After moving outward, the limiting seat 4 enters the top of the movable seat 17 and limits the upper and lower movement of the movable seat 17 through the limiting seat 4. The support mechanism 11 is a support spring. After being compressed, the support spring generates a rebound force to realize the support movement of the limiting seat 4.

[0022] In this embodiment, a fixing pipe 8 is fixed to one end of the collection box 2, a drain pipe 9 is fixedly installed to one end of the fixing pipe 8, and one end of the drain pipe 9 is fixedly installed on the box body 1. A slider 10 is welded to the top of the box body 1, and a sliding groove is opened at the bottom of the limiting seat 4. A movable seat 17 is welded to one end of the support frame 16, the movable seat 17 is movably installed on the filter plate 3, the limiting seat 4 is movably installed on the top of the movable seat 17, a threaded column 18 is rotatably installed on the support frame 16, a handle 20 is fixed to one end of the threaded column 18, and a limiting plate 19 is rotatably installed on the other end of the threaded column 18. The top of the inner cylinder 27 is fixed with a liquid inlet hopper 28. The inner cylinder 27 has an opening 31. The side of the ring seat 24 is fixed with a drain pipe 25 and a water inlet pipe 40 respectively. The inside of the ring seat 24 has an annular groove 34. The threaded column 18 rotates to push the limiting plate 19 to move. After the limiting plate 19 moves to the side, it limits the movement distance between the support frame 16 and the fixed seat 13. The limiting of the limiting plate 19 effectively avoids the impact caused by the collision between the support pipe 29 and the inner wall of the box 1.

[0023] In this embodiment, a drive motor 41 and a support tube 29 are fixedly installed at the bottom of the base 21. A fixing column 30 is welded to the side of the support tube 29. A rotating column 37 is installed on the drive motor 41 and is rotatably installed inside the barrel body 22. A rotating seat 32 is movably installed on the rotating column 37. A toggle plate 33 is welded to the rotating seat 32. A limit groove 38 is opened on the side wall of the rotating column 37, and a reset mechanism 39 is fixedly installed inside the limit groove 38. One end of the reset mechanism 39 is fixed with a limiting block 42. The side of the limiting block 42 is welded to the rotating seat 32. The rotating seat 32 is movably installed on the side of the limiting groove 38. The reset mechanism 39 is a reset spring. The reset spring generates a squeezing force through the descent of the limiting block 42. After squeezing, the reset spring generates a rebound force. Under the support of the rebound force, the rotating seat 32 moves upward to the side of the annular groove 34. Later, the movement of the rotating seat 32 completes the scraping and cleaning of the inner wall of the barrel 22. The rotating seat 32 is distributed on the side of the annular groove 34. The rotation of the rotating seat 32 throws the scraped and collected impurities into the interior of the annular seat 24 for collection by centrifugal force.

[0024] In this embodiment, a support column 43 is welded to the top of the rotating column 37, and a stirring rod 44 is welded to the support column 43. The stirring rod 44 is rotatably installed inside the inner cylinder 27. A cavity 35 is opened inside the barrel 22, and a water inlet hole 36 is opened on the inner wall of the cavity 35. One end of the support tube 29 is fixedly installed inside the cavity 35. A support mechanism 11 is fixed on the inner wall of the chute, and one end of the support mechanism 11 is fixedly installed on the slider 10. The slider 10 is movably installed inside the chute. The support tube 29 is distributed on the side of the drive motor 41. The support tube 29 provides shielding and protection for the side of the drive motor 41. In addition, the movement of the support tube 29 changes the drainage position, and at the same time, the movement of the support tube 29 re-stirs the sewage inside the tank 1 through the fixed column 30.

[0025] Working Principle: During use, wastewater and chemicals are simultaneously introduced into the inlet hopper 28. The wastewater in the inlet hopper 28 enters the inner cylinder 27. As the wastewater increases, it is squeezed, causing the wastewater to be discharged outward through the opening 31. After the wastewater is discharged to the top of the rotating seat 32, water flows outward through the opening 31 on the side of the inner cylinder 27 as the wastewater increases. The flow rate is controlled to prolong the time the wastewater stays inside the inner cylinder 27. The wastewater pushes the rotating seat 32 downward. When the rotating seat 32 moves downward, the limiting block 42 squeezes the reset mechanism 39, starting the drive motor 41 to drive the rotating column 37 to rotate. As the rotating column 37 rotates, it drives the rotating seat 32 to rotate through the limiting groove 38 and the limiting block 42. The rotation of the rotating seat 32 generates centrifugal force, which pushes the wastewater into the cavity 35 through the water inlet 36. At the same time, the rotation of the rotating column 37 causes the support column 43 and the stirring rod 44 to rotate. Later, the rotation of the stirring rod 44 accelerates the outward discharge of wastewater and also makes the wastewater and chemical reagents mix quickly. Water is squeezed out through opening 31 while being mixed and stirred again, thereby effectively improving the uniformity of the mixing of chemical reagents and sewage. When sewage enters through opening 31, the rotation of rotating column 37 and stirring rod 44 can also be stopped. After stirring rod 44 stops, sewage slowly falls down through opening 31, thereby increasing the time sewage stays inside inner cylinder 27. When sewage enters the cavity 35, it is discharged downward from the support pipe 29 at the bottom of cavity 35. The support pipe 29 discharges sewage into the interior of tank 1. As the sewage level increases, impurities floating on the sewage surface move to the side and are collected in the collection tank 2. Later, the position of barrel 22 is moved by external power mechanism. When barrel 22 moves, fixed seat 13 drives movable seat 17 to move on filter plate 3. Movable seat 17 moves to clean the filter plate 3 by scraping. In addition, the support pipe 29 at the bottom of base 21 stirs and mixes the sewage inside the tank 1 a second time through fixed column 30. While stirring and mixing, the sewage discharge point is adjusted. Wastewater discharged into the tank 1 is discharged outward through the drain pipe 9 for further purification. When the support assembly 6 needs to be disassembled, the limiting seat 4 is pushed inward, and the limiting seat 4 moves out from the top of the movable seat 17. After the top of the movable seat 17 is no longer limited, the fixed seat 13 is removed upward as a whole. After the movable seat 17 is removed, the filter plate 3 is subjected to vertical compression, and the filter plate 3 can also be moved upward for removal. The tank 22 is installed on the fixed seat 13 through the base 21. The distance between the fixed seats 13 can be adjusted according to different diameters to meet the installation requirements of tanks 22 of different diameters. During use, the rebound force generated by the reset mechanism 39 pushes the rotating seat 32 back into position. The rotating seat 32 is distributed on the side of the annular groove 34. Later, the movement of the rotating seat 32 completes the scraping and cleaning of the inner wall of the barrel 22. The rotating seat 32 is distributed on the side of the annular groove 34. The rotation of the rotating seat 32 throws the scraped and collected impurities into the interior of the annular seat 24 for collection by centrifugal force. After the impurities enter the interior of the annular groove 34, water slowly enters through the water inlet pipe 40 to rinse the interior of the annular groove 34. During rinsing, one end of the drain pipe 25 is suspended at the bottom of the tank 1. The sewage discharged by the drain pipe 25 is collected through the tank 1.

[0026] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0027] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0028] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A deep purification and reuse system for propylene oxide production wastewater, characterized in that, include: Box (1), a collection box (2) is fixed on the side of the box (1), a filter plate (3) is movably installed inside the collection box (2), a slot (12) is opened on the filter plate (3), a positioning column (5) is fixed on the inner wall of the box (1), a support component (6) is movably installed on the positioning column (5), and a limiting seat (4) is movably installed on the top of the box (1). Support component (6), the support component (6) includes a fixed base (13), the fixed base (13) is welded to both ends of a fixed frame (15), the fixed base (13) has a fixed hole (14), the purification component (7) is movably installed inside the fixed hole (14), and a support frame (16) is welded to one side of the fixed frame (15). Purification component (7), the purification component (7) includes a base (21), a barrel (22) is fixedly installed on the base (21), a ring seat (24) and a reinforcing plate (23) are fixed on the side of the barrel (22), one end of the reinforcing plate (23) is fixed to the bottom of the ring seat (24), a support rod (26) is welded on the inner wall of the barrel (22), and an inner cylinder (27) is fixedly installed between the support rods (26).

2. The propylene oxide production wastewater deep purification and reuse system according to claim 1, characterized in that, One end of the collection box (2) is fixed with a fixing pipe (8), and one end of the fixing pipe (8) is fixed with a drain pipe (9). One end of the drain pipe (9) is fixedly installed on the box body (1). A slider (10) is welded to the top of the box body (1), and a groove is opened at the bottom of the limiting seat (4).

3. The propylene oxide production wastewater deep purification and reuse system according to claim 2, characterized in that, One end of the support frame (16) is welded with a movable seat (17), which is movably mounted on the filter plate (3). The limiting seat (4) is movably mounted on the top of the movable seat (17). A threaded column (18) is rotatably mounted on the support frame (16). One end of the threaded column (18) is fixed with a handle (20), and the other end of the threaded column (18) is rotatably mounted with a limiting plate (19).

4. The propylene oxide production wastewater deep purification and reuse system according to claim 1, characterized in that, The top of the inner cylinder (27) is fixed with a liquid inlet hopper (28), the inner cylinder (27) has an opening (31), the side of the ring seat (24) is fixed with a drain pipe (25) and a water inlet pipe (40), and the inside of the ring seat (24) has an annular groove (34).

5. The propylene oxide production wastewater deep purification and reuse system according to claim 1, characterized in that, The bottom of the base (21) is fixedly installed with a drive motor (41) and a support tube (29). A fixed column (30) is welded to the side of the support tube (29). A rotating column (37) is installed on the drive motor (41). The rotating column (37) is rotatably installed inside the barrel (22).

6. The propylene oxide production wastewater deep purification and reuse system according to claim 5, characterized in that, A rotating seat (32) is movably mounted on the rotating column (37), and a toggle plate (33) is welded on the rotating seat (32). A limit groove (38) is opened on the side wall of the rotating column (37), and a reset mechanism (39) is fixedly installed inside the limit groove (38).

7. The propylene oxide production wastewater deep purification and reuse system according to claim 6, characterized in that, One end of the reset mechanism (39) is fixed with a limiting block (42), the side of the limiting block (42) is welded to the rotating seat (32), and the rotating seat (32) is movably installed on the side of the limiting groove (38).

8. The propylene oxide production wastewater deep purification and reuse system according to claim 6, characterized in that, A support column (43) is welded to the top of the rotating column (37), and a stirring rod (44) is welded to the support column (43). The stirring rod (44) is rotatably installed inside the inner cylinder (27).

9. The propylene oxide production wastewater deep purification and reuse system according to claim 5, characterized in that, The barrel (22) has a cavity (35) inside, and a water inlet hole (36) is opened on the inner wall of the cavity (35). One end of the support pipe (29) is fixedly installed inside the cavity (35).

10. The propylene oxide production wastewater deep purification and reuse system according to claim 2, characterized in that, A support mechanism (11) is fixed on the inner wall of the slide groove. One end of the support mechanism (11) is fixedly installed on the slider (10), and the slider (10) is movably installed inside the slide groove.

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