Acid waste liquid treatment device for methyl methacrylate production

Abstract

The invention discloses an acidic waste liquid treatment device for methyl methacrylate production, and relates to the technical field of waste liquid treatment devices.The acidic waste liquid treatment device comprises a treatment box, a feeding pipe is fixedly installed on the side wall face of the treatment box, and a liquid inlet pipe is fixedly installed on the other side wall face of the treatment box. A neutralized and precipitated reagent is guided into a feeding pipe, a driving stirring assembly is started to drive a frame to rotate, then the frame stirs and mixes the waste liquid and the reagent, meanwhile, an aeration machine blows air, the waste liquid and the reagent are aerated and mixed through an aeration spray head, and when the frame rotates, the waste liquid and the reagent are mixed through the aeration spray head. The inner wall face of the treatment box is cleaned through a scraper blade, sediments are prevented from being attached to the inner wall face of the treatment box, at the moment, the sediments and liquid in the waste liquid are settled, a discharging pipe is opened after settling, the sediments and the liquid enter a filtering assembly at the same time, then the sediments are filtered, and the liquid is discharged through a liquid outlet pipe.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid treatment devices, in particular to an acidic waste liquid treatment device for methyl methacrylate production. Background Art

[0002] Methyl methacrylate, with the chemical formula C5H8O2 and a chemical weight of 100.12, is an organic compound, also known as MMA, or methyl ester for short. It is an important chemical raw material and a monomer for the production of transparent plastic polymethyl methacrylate (plexiglass, PMMA). It is flammable, has a strong pungent odor, and is moderately toxic. Long-term contact should be avoided.

[0003] During the production of methyl methacrylate, a large amount of acidic waste liquid is generated. These waste liquids contain a large amount of acidic substances and cannot be discharged directly. Therefore, they need to be treated to make them neutral before they can be discharged. The existing methods for treating acidic liquids are mostly to neutralize them through chemical methods, such as directly mixing the acidic waste liquid with the alkaline waste liquid to neutralize the acidic waste liquid and the alkaline waste liquid, or adding an alkaline neutralizer to the acidic waste liquid to neutralize the acid in the acidic waste liquid. However, these reactions all need to be carried out in a neutralization tank. After the acidic waste liquid generated by the production of methyl methacrylate is neutralized, a layer of impurities will precipitate and adhere to the bottom of the neutralization tank. The traditional neutralization tank does not have the function of automatically cleaning these impurities. If these impurities are not cleaned in time, the drain port of the neutralization tank will be blocked over time. Therefore, after each neutralization, the impurities at the bottom of the neutralization tank need to be cleaned. The traditional method is to manually clean and flush through a water pipe. This method is extremely labor-intensive and has low cleaning efficiency. Summary of the Invention

[0004] In response to the shortcomings of the prior art, the present invention provides an acidic waste liquid treatment device for methyl methacrylate production, which solves the problem that the existing neutralization tank does not have the function of automatically cleaning these impurities. However, if these impurities are not cleaned in time, the drain port of the neutralization tank will be blocked over time. Therefore, the impurities at the bottom of the neutralization tank need to be cleaned after each neutralization. The traditional method is to clean the impurities manually by flushing through a water pipe. This method is extremely labor-intensive and has low cleaning efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A device for treating acidic waste liquid for methyl methacrylate production, comprising a treatment box, a feed pipe fixedly installed on the side wall of the treatment box, a liquid inlet pipe fixedly installed on the other side wall of the treatment box, an aerator fixedly installed on the upper outer wall of the treatment box, a drive stirring assembly connected between the aerator and the treatment box, a frame provided on the drive stirring assembly, the frame having a hollow structure, a plurality of aeration nozzles fixedly installed on the outer lower wall of the frame, scrapers fixedly installed on both side walls of the frame, a discharge pipe fixedly installed on the lower wall of the treatment box, a filter assembly connected to the lower end of the discharge pipe, and a liquid outlet pipe fixedly installed on the side wall of the filter assembly.

[0006] Preferably, the driving stirring assembly includes a first box body, the first box body is fixedly mounted on the outer upper wall of the treatment box and is located on one side of the aerator, a motor is fixedly mounted on the inner inner wall of the first box body, a first gear is fixedly mounted on the driving end of the motor, a tube body is rotatably mounted on the upper wall of the treatment box, the upper end of the tube body is located in the first box body and is fixedly mounted with a second gear, the first gear is meshed with the second gear, a connecting pipe is fixedly mounted on the aerator, the connecting pipe passes through the first box body and is rotatably connected to the upper end of the tube body, and the lower end of the tube body The end is located in the processing box and is connected to the frame, the second box body is fixedly installed on the upper wall of the processing box, the inner wall of the second box body is fixedly installed with a gear ring, the lower wall of the second box body is provided with a mounting opening, a rotating plate is rotatably installed in the mounting opening, the tube body passes through the rotating plate and is fixedly connected to the rotating plate, a pair of shafts are rotatably installed on the lower wall of the frame, the upper ends of the shafts pass through the frame and the rotating plate, the upper ends of the shafts are fixedly installed with a third gear, the third gear is meshed with the gear ring, and a number of stirring plates are fixedly installed on the shafts.

[0007] Preferably, the filter assembly includes a filter barrel, the upper end of the filter barrel is an open structure, the upper end cover of the filter barrel is equipped with an upper cover, the upper end of the upper cover is fixedly connected to a hose, the hose is connected to the discharge pipe flange, the inner wall of the filter barrel is fixedly installed with a clamping ring, the clamping ring is provided with an annular groove, a ring body is inserted in the annular groove, the upper end of the ring body is exposed in the annular groove and is fixedly installed with a bucket body, the lower end of the bucket body is fixedly installed with a filter tube, and the filter tube is provided with a plurality of filter holes.

[0008] Preferably, a bearing annular plate is fixedly mounted on the outer wall of the processing box, and four supporting legs with the same structure are fixedly mounted on the lower wall of the bearing annular plate.

[0009] Preferably, the lower wall of the processing box is a funnel-shaped structure, the discharge pipe is fixedly installed at the center of the funnel-shaped structure of the lower wall of the processing box, and the scraper is in contact with the inner wall of the processing box.

[0010] Preferably, a valve is fixedly installed on the discharge pipe, and the valve is used to control the opening and closing of the discharge pipe.

[0011] Preferably, a liquid level gauge is fixedly mounted on the outer front wall of the processing box, and the liquid level gauge is used to detect whether the height of the liquid in the processing box is higher than the frame.

[0012] Preferably, a connecting rod is fixedly installed between the upper and lower walls in the frame and between a pair of shaft rods, and a spiral blade is fixedly installed on the connecting rod.

[0013] Preferably, the first gear and the second gear are both bevel gear structures.

[0014] Beneficial effect: The present invention provides an acidic waste liquid treatment device for methyl methacrylate production, which solves the problem that the existing neutralization tank does not have the function of automatically cleaning these impurities. However, if these impurities are not cleaned in time, the drain port of the neutralization tank will be blocked over time. Therefore, the impurities on the bottom of the neutralization tank need to be cleaned after each neutralization is completed. The traditional method is to clean it manually and flush it through a water pipe. This method is extremely labor-intensive and has low cleaning efficiency. In the present invention, the waste liquid enters the treatment box through the liquid inlet pipe, and the feed pipe introduces the reagent for neutralization and precipitation. The frame is driven to rotate by starting the stirring assembly, so that the frame stirs and mixes the waste liquid and the reagent. At the same time, the aerator blows in air and aerates the waste liquid and the reagent through the aeration nozzle, and mixes them. When the frame rotates, the scraper cleans the inner wall of the treatment box to prevent the sediment from adhering to the inner wall of the treatment box. At this time, the sediment and liquid in the waste liquid are settled and placed. After settling, the discharge pipe is opened to allow the sediment and liquid to enter the filter assembly at the same time, and the sediment is filtered, and the liquid is discharged through the liquid outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of an acidic waste liquid treatment device for methyl methacrylate production according to the present invention.

[0016] Figure 2 This is a schematic diagram of the rear structural view of an acidic waste liquid treatment device for methyl methacrylate production according to the present invention.

[0017] Figure 3 The present invention provides a schematic cross-sectional structural diagram of an acidic waste liquid treatment device for methyl methacrylate production.

[0018] Figure 4 This is a schematic structural diagram of a driving and stirring assembly of an acidic waste liquid treatment device for methyl methacrylate production according to the present invention.

[0019] Figure 5 The present invention provides a schematic cross-sectional structural diagram of a driving and stirring assembly of an acidic waste liquid treatment device for methyl methacrylate production.

[0020] Figure 6 The present invention provides a schematic cross-sectional structural diagram of a filter assembly of an acidic waste liquid treatment device for methyl methacrylate production.

[0021] Figure 7 This is a schematic diagram of the explosion structure of the filter assembly of the acidic waste liquid treatment device for methyl methacrylate production described in the present invention.

[0022] Figure 8 for Figure 3 Schematic diagram of the local structure.

[0023] In the figure: 1. Processing box; 2. Feed pipe; 3. Liquid inlet pipe; 4. Aerator; 5. Frame; 6. Aeration nozzle; 7. Scraper; 8. Discharge pipe; 9. Liquid outlet pipe; 10. First box body; 11. Motor; 12. First gear; 13. Pipe body; 14. Second gear; 15. Connecting pipe; 16. Second box body; 17. Ring gear; 18. Rotating plate; 19. Shaft; 20. Third gear; 21. Stirring plate; 22. Filter barrel; 23. Upper cover; 24. Hose; 25. Snap ring; 26. Annular groove; 27. Ring body; 28. Bucket body; 29. Filter tube; 30. Filter hole; 31. Bearing annular plate; 32. Support leg; 33. Liquid level gauge; 34. Spiral blade. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1-8 The present invention provides a technical solution: a device for treating acidic waste liquid used in the production of methyl methacrylate, comprising a treatment box 1, a feed pipe 2 being fixedly mounted on a side wall of the treatment box 1, a liquid inlet pipe 3 being fixedly mounted on the other side wall of the treatment box 1, an aerator 4 being fixedly mounted on the outer upper wall of the treatment box 1, a drive stirring assembly being connected between the aerator 4 and the treatment box 1, a frame 5 being provided on the drive stirring assembly, the frame 5 being a hollow structure, a plurality of aeration nozzles 6 being fixedly mounted on the outer lower wall of the frame 5, scrapers 7 being fixedly mounted on both side walls of the frame 5, a discharge pipe 8 being fixedly mounted on the lower wall of the treatment box 1, a filter assembly being connected to the lower end of the discharge pipe 8, and a liquid outlet pipe 9 being fixedly mounted on the side wall of the filter assembly.

[0026] The waste liquid enters the treatment box 1 through the liquid inlet pipe 3, and the feed pipe 2 introduces the reagent for neutralizing the precipitation. The frame 5 is driven to rotate by starting the stirring assembly, so that the frame 5 stirs and mixes the waste liquid and the reagent. At the same time, the aerator 4 blows in air and aerates the waste liquid and the reagent through the aeration nozzle 6, and mixes them. When the frame 5 rotates, the scraper 7 cleans the inner wall of the treatment box 1 to prevent the sediment from adhering to the inner wall of the treatment box 1. At this time, the sediment and liquid in the waste liquid are settled and placed. After settling, the discharge pipe 8 is opened to allow the sediment and liquid to enter the filter assembly at the same time, and then the sediment is filtered, and the liquid is discharged through the liquid outlet pipe 9.

[0027] This embodiment is further configured as follows: the driving stirring assembly includes a first box body 10, the first box body 10 is fixedly mounted on the outer upper wall of the treatment box 1 and is located on one side of the aerator 4, a motor 11 is fixedly mounted on the inner wall of the first box body 10, a first gear 12 is fixedly mounted on the driving end of the motor 11, a tube body 13 is rotatably mounted on the upper wall of the treatment box 1, the upper end of the tube body 13 is located in the first box body 10 and is fixedly mounted with a second gear 14, the first gear 12 is meshed with the second gear 14, a connecting pipe 15 is fixedly mounted on the aerator 4, the connecting pipe 15 passes through the first box body 10 and is rotatably connected to the upper end of the tube body 13, the tube body The lower end of 13 is located in the processing box 1 and is connected to the frame 5. The second box body 16 is fixedly installed on the upper wall of the processing box 1, and the inner wall of the second box body 16 is fixedly installed with a ring gear 17. The lower wall of the second box body 16 is provided with a mounting opening, and a rotating plate 18 is rotatably installed in the mounting opening. The tube body 13 passes through the rotating plate 18 and is fixedly connected to the rotating plate 18. A pair of shafts 19 are rotatably installed on the lower wall of the frame 5. The upper ends of the shafts 19 pass through the frame 5 and the rotating plate 18. A third gear 20 is fixedly installed on the upper end of the shaft 19. The third gear 20 is meshed with the ring gear 17, and a number of stirring plates 21 are fixedly installed on the shaft 19.

[0028] Start the motor 11, and the driving end of the motor 11 drives the first gear 12 to rotate. The first gear 12 is meshed with the second gear 14, so that the second gear 14 drives the tube body 13 to rotate, and the tube body 13 drives the rotating plate 18 and the frame 5 to rotate. Since the third gear 20 is meshed with the ring gear 17, when the frame 5 rotates, the third gear 20 drives the shaft 19 to rotate, and the shaft 19 drives the stirring plate 21 to rotate, thereby mixing the waste liquid and the reagent. At the same time, since the frame 5 is a hollow structure and the tube body 13 is connected to the frame 5, the aerator 4 introduces air into the tube body 13 through the connecting pipe 15, and then introduces it into the frame 5 through the tube body 13, and the aeration nozzle 6 aerates the waste liquid and the reagent.

[0029] This embodiment is further configured as follows: the filter assembly includes a filter barrel 22, the upper end of the filter barrel 22 is an open structure, the upper end cover of the filter barrel 22 is provided with an upper cover 23, the upper end of the upper cover 23 is fixedly connected to a hose 24, the hose 24 is flange-connected to the discharge pipe 8, the inner wall surface of the filter barrel 22 is fixedly installed with a clamping ring 25, the clamping ring 25 is provided with an annular groove 26, a ring body 27 is inserted in the annular groove 26, the upper end of the ring body 27 is exposed in the annular groove 26 and is fixedly installed with a bucket body 28, the lower end of the bucket body 28 is fixedly installed with a filter tube 29, and the filter tube 29 is provided with a plurality of filter holes 30.

[0030] The hose 24 can be disassembled and connected to the discharge pipe 8, and the upper cover 23 and the filter barrel 22 can be disassembled. The sediment and liquid are introduced into the hose 24 through the discharge pipe 8. The hose 24 introduces the sediment and liquid into the bucket body 28. The bucket body 28 gathers the sediment and liquid and introduces them into the filter tube 29. The liquid is discharged through the filter hole 30, and the sediment is collected by the filter tube 29.

[0031] When the filter tube 29 needs to be cleaned, the hose 24 and the discharge pipe 8 are removed, the upper cover 23 and the filter barrel 22 are removed, the filter tube 29 is lifted up, and the filter tube 29 is cleaned. After cleaning, the ring body 27 is inserted into the annular groove 26 so that the filter tube 29 is located in the filter barrel 22 again, the upper cover 23 is connected to the filter barrel 22, and the hose 24 is connected to the discharge pipe 8 for easy use next time.

[0032] This embodiment is further configured such that a bearing annular plate 31 is fixedly mounted on the outer wall of the processing box 1 , and four supporting legs 32 of the same structure are fixedly mounted on the lower wall of the bearing annular plate 31 .

[0033] This embodiment is further configured such that the lower wall of the processing box 1 is a funnel-shaped structure, the discharge pipe 8 is fixedly installed at the center of the funnel-shaped structure of the lower wall of the processing box 1, and the scraper 7 is in contact with the inner wall of the processing box 1.

[0034] This embodiment is further configured such that a valve is fixedly installed on the discharge pipe 8 , and the valve is used to control the opening and closing of the discharge pipe 8 .

[0035] This embodiment is further configured such that a liquid level gauge 33 is fixedly mounted on the outer front wall of the processing box 1 , and the liquid level gauge 33 is used to detect whether the height of the liquid in the processing box 1 is higher than the frame 5 .

[0036] This embodiment is further configured such that a connecting rod is fixedly installed between the upper and lower walls of the frame 5 and between the pair of shafts 19, and a spiral blade 34 is fixedly installed on the connecting rod; The spiral blades 34 can assist in mixing the waste liquid with the reagent.

[0037] This embodiment is further configured such that both the first gear 12 and the second gear 14 are bevel gear structures.

[0038] The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process. The specific operations are as follows.

[0039] Embodiment: According to the drawings of the specification, the waste liquid enters the treatment box 1 through the liquid inlet pipe 3, the feed pipe 2 introduces the reagent for neutralization and precipitation, and the motor 11 is started. The driving end of the motor 11 drives the first gear 12 to rotate, and the first gear 12 is meshed with the second gear 14, so that the second gear 14 drives the tube body 13 to rotate, and the tube body 13 drives the rotating plate 18 and the frame 5 to rotate. Since the third gear 20 is meshed with the ring gear 17, when the frame 5 rotates, the third gear 20 drives the shaft 19 to rotate, and the shaft 19 drives the stirring plate 21 to rotate, thereby mixing the waste liquid and the reagent. At the same time, since the frame 5 is a hollow structure and the tube body 13 is connected to the frame 5, the aerator 4 passes the air through the connection The pipe 15 is introduced into the pipe body 13, and then introduced into the frame 5 through the pipe body 13. The aeration nozzle 6 aerates the waste liquid and the reagent, and the frame 5 rotates, thereby causing the frame 5 to stir and mix the waste liquid and the reagent. When the frame 5 rotates, the scraper 7 cleans the inner wall of the treatment box 1 to prevent sediment from adhering to the inner wall of the treatment box 1. At this time, the sediment and liquid in the waste liquid are settled and placed. After settling, the discharge pipe 8 is opened, allowing the sediment and liquid to enter the filter barrel 22 at the same time. The sediment and liquid are introduced into the hose 24 through the discharge pipe 8. The hose 24 guides the sediment and liquid into the bucket 28. The bucket 28 gathers the sediment and liquid and guides them into the filter tube 29. The liquid is discharged through the filter hole 30, and the sediment is collected by the filter tube 29. The hose 24 can be disassembled and connected to the discharge pipe 8, and the upper cover 23 and the filter barrel 22 can be disassembled. When the filter tube 29 needs to be cleaned, remove the hose 24 and the discharge pipe 8, remove the upper cover 23 and the filter barrel 22, lift the filter tube 29 upward, and then clean the filter tube 29. After cleaning, insert the ring body 27 into the annular groove 26 so that the filter tube 29 is located in the filter barrel 22 again, connect the upper cover 23 to the filter barrel 22, and connect the hose 24 to the discharge pipe 8 for easy use next time.

[0040] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A device for treating acidic waste liquid from methyl methacrylate production, comprising a treatment box (1), characterized in that: A feed pipe (2) is fixedly mounted on the side wall of the treatment box (1), a liquid inlet pipe (3) is fixedly mounted on the other side wall of the treatment box (1), an aerator (4) is fixedly mounted on the outer upper wall of the treatment box (1), a driving stirring assembly is connected between the aerator (4) and the treatment box (1), a frame (5) is provided on the driving stirring assembly, the frame (5) is a hollow structure, a plurality of aeration nozzles (6) are fixedly mounted on the outer lower wall of the frame (5), scrapers (7) are fixedly mounted on the outer side walls of the frame (5), a discharge pipe (8) is fixedly mounted on the lower wall of the treatment box (1), a filter assembly is connected to the lower end of the discharge pipe (8), and a liquid outlet pipe (9) is fixedly mounted on the side wall of the filter assembly.

2. The acidic waste liquid treatment device for methyl methacrylate production according to claim 1, characterized in that The driving and stirring assembly comprises a first box body (10), the first box body (10) is fixedly mounted on the outer upper wall of the treatment box (1) and is located on one side of the aerator (4), a motor (11) is fixedly mounted on the inner wall of the first box body (10), a first gear (12) is fixedly mounted on the driving end of the motor (11), a tube body (13) is rotatably mounted on the upper wall of the treatment box (1), the upper end of the tube body (13) is located in the first box body (10) and is fixedly mounted with a second gear (14), the first gear (12) is meshed with the second gear (14), a connecting pipe (15) is fixedly mounted on the aerator (4), the connecting pipe (15) passes through the first box body (10) and is rotatably connected to the upper end of the tube body (13), and the lower end of the tube body (13) is located The processing box (1) is connected to the frame (5), the upper wall surface of the processing box (1) is fixedly installed with a second box body (16), the inner wall surface of the second box body (16) is fixedly installed with a gear ring (17), the lower wall surface of the second box body (16) is provided with an installation opening, a rotating plate (18) is rotatably installed in the installation opening, the tube body (13) passes through the rotating plate (18) and is fixedly connected to the rotating plate (18), a pair of shafts (19) are rotatably installed on the lower wall surface of the frame (5), the upper ends of the shafts (19) pass through the frame (5) and the rotating plate (18), the upper ends of the shafts (19) are fixedly installed with a third gear (20), the third gear (20) is meshed with the gear ring (17), and a plurality of stirring plates (21) are fixedly installed on the shafts (19).

3. The acidic waste liquid treatment device for methyl methacrylate production according to claim 1, characterized in that The filter assembly includes a filter barrel (22), the upper end of the filter barrel (22) is an open structure, the upper end cover of the filter barrel (22) is equipped with an upper cover (23), the upper end of the upper cover (23) is fixedly connected to a hose (24), the hose (24) is flange-connected to the discharge pipe (8), a clamping ring (25) is fixedly installed on the inner wall of the filter barrel (22), an annular groove (26) is provided on the clamping ring (25), a ring body (27) is inserted in the annular groove (26), the upper end of the ring body (27) is exposed in the annular groove (26) and is fixedly installed with a bucket body (28), a filter tube (29) is fixedly installed at the lower end of the bucket body (28), a plurality of filter holes (30) are provided on the filter tube body (29), and the liquid outlet pipe (9) is connected to the filter barrel (22).

4. The acidic waste liquid treatment device for methyl methacrylate production according to claim 1, characterized in that A bearing annular plate (31) is fixedly mounted on the outer wall of the processing box (1), and four supporting legs (32) with the same structure are fixedly mounted on the lower wall of the bearing annular plate (31).

5. The acidic waste liquid treatment device for methyl methacrylate production according to claim 1, characterized in that The lower wall of the processing box (1) is a funnel-shaped structure, the discharge pipe (8) is fixedly installed at the center of the funnel-shaped structure of the lower wall of the processing box (1), and the scraper (7) is in contact with the inner wall of the processing box (1).

6. The acidic waste liquid treatment device for methyl methacrylate production according to claim 1, characterized in that A valve is fixedly installed on the discharge pipe (8), and the valve is used to control the opening and closing of the discharge pipe (8).

7. The acidic waste liquid treatment device for methyl methacrylate production according to claim 1, characterized in that A liquid level gauge (33) is fixedly mounted on the outer front wall of the processing box (1), and the liquid level gauge (33) is used to detect whether the height of the liquid in the processing box (1) is not higher than the frame (5).

8. The acidic waste liquid treatment device for methyl methacrylate production according to claim 2, characterized in that A connecting rod is fixedly installed between the upper and lower walls of the frame (5) and between a pair of shaft rods (19), and a spiral blade (34) is fixedly installed on the connecting rod.

9. The acidic waste liquid treatment device for methyl methacrylate production according to claim 2, characterized in that , the first gear (12) and the second gear (14) are both bevel gear structures.

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