Polyaluminum chloride flocculant production device and production method

Abstract

The invention belongs to the technical field of water treatment agents, and particularly relates to a polyaluminum chloride flocculant production device and method.The polyaluminum chloride flocculant production device comprises a solid-liquid separator, the top face of the solid-liquid separator communicates with a feeding pipe, the bottom face of the solid-liquid separator communicates with a discharging pipe, a first collecting tank is formed in the solid-liquid separator, and a second collecting tank is formed in the bottom face of the solid-liquid separator; an inclined connecting frame is slidably connected into the solid-liquid separator, and a filter screen is fixedly connected to the inner wall of the connecting frame; when the solid-liquid separator is used, a mixture is injected into the solid-liquid separator from the feeding pipe, at the moment, the mixture can pass through the vibrating and obliquely-arranged filter screen, insoluble substances are filtered and left on the filter screen, liquid enters the first collecting tank, and the insoluble substances slide on the oblique filter screen when the filter screen is vibrated, so that the insoluble substances cannot be accumulated at the feeding position of the feeding pipe; the filter screen pores in the water inlet area are prevented from being blocked in a large area, so that the solid-liquid separation efficiency of the solid-liquid separator 1 is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment agents, in particular to a production device and a production method of a polyaluminium chloride flocculant. Background Art

[0002] Polyaluminium chloride (PAC) is a highly efficient inorganic polymer flocculant, mainly used to remove suspended solids, colloids and some soluble pollutants in water treatment. Its function is to flocculate and precipitate impurities through electrical neutralization and adsorption bridging mechanism. It is widely used in drinking water purification, industrial wastewater treatment and sludge dehydration. In the production process of polyaluminium chloride flocculant, multiple steps are required, including raw material preparation, acid dissolution reaction, polymerization reaction and concentration and drying.

[0003] During the acid dissolution reaction, the raw materials will produce insoluble matter and AlCl3 solution. At this time, a solid-liquid separator is needed to remove the insoluble matter. The insoluble matter specifically refers to silicate minerals and unreacted aluminum sources contained in the aluminum electrolysis waste slag.

[0004] A solid-liquid separator usually adopts a horizontally arranged filter screen structure. Its working principle is to pour the mixed material into the solid-liquid separator through the feed port and use the filter screen to achieve solid-liquid separation. However, in actual operation, since the material continues to enter from the feed port in a concentrated manner, the separated insoluble matter will preferentially accumulate in the filter screen area close to the feed port. As the insoluble matter increases, these insoluble matter will gradually form a dense accumulation layer, resulting in large-scale blockage of the filter screen pores in the water inlet area. This local blockage phenomenon will not only significantly reduce the filtration efficiency, but also cause a decrease in processing capacity. The present invention provides a polyaluminium chloride flocculant production device and a production method. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a polyaluminium chloride flocculant production device described in the present invention comprises a solid-liquid separator; the top surface of the solid-liquid separator is connected to a feed pipe, and the bottom surface of the solid-liquid separator is connected to a discharge pipe; a first collecting tank is provided in the solid-liquid separator, and an inclined connecting frame is slidably connected in the solid-liquid separator, and a filter screen is fixedly connected to the inner wall of the connecting frame; a support plate is fixedly connected to the inner wall of the solid-liquid separator, and an electric telescopic rod for pushing the connecting frame is fixedly connected to the top surface of the support plate; a group of fixed plates are fixedly connected to the inner wall of the solid-liquid separator, and a first spring is fixedly connected between the top surface of the fixed plate and the connecting frame.

[0007] A guiding groove is formed inside the solid-liquid separator. The guiding groove is inclined and communicates with the first collection tank. A second collection tank is formed inside the solid-liquid separator. The bottom surface of the second collection tank is inclined. A discharge groove is formed in the side wall of the solid-liquid separator, and a first sealing plate is arranged in the discharge groove.

[0008] A connecting block is arranged at the bottom end of the feed pipe. A hollow groove is formed inside the connecting block. The bottom surface of the inner wall of the connecting block is higher in the middle and lower on both sides. A set of discharge grooves communicating with the hollow groove are formed on the bottom surface of the connecting block.

[0009] A moving groove is formed inside the connecting block. The moving groove communicates with the discharge groove. A second sealing plate is hermetically and slidably connected in the moving groove. The second sealing plate is used to seal the discharge groove. A connecting groove corresponding to the discharge groove is formed on the second sealing plate. The output end of the electric telescopic rod is fixedly connected with a hollow elastic block. A connecting pipe is communicated between the elastic block and the hollow groove. A second spring is fixedly connected between the side of the second sealing plate away from the connecting pipe and the inner wall of the hollow groove.

[0010] A third collection tank is formed inside the solid-liquid separator. A liquid discharge groove with an inclined setting is formed inside the solid-liquid separator. The two ends of the liquid discharge groove communicate with the third collection tank and the first collection tank respectively. A plurality of groups of penetration holes are formed between the third collection tank and the second collection tank.

[0011] A circular groove communicating with the second collection tank is formed inside the solid-liquid separator. A push rod is hermetically and slidably connected in the circular groove. A third spring is fixedly connected between the side of the push rod close to the first collection tank and the inner wall of the circular groove. A pressing plate is fixedly connected to the side of the push rod away from the third spring. A hollow block is fixedly connected to the inner wall of the guiding groove. A push block is hermetically and slidably connected in the inner wall of the hollow block. A support frame is fixedly connected to the inner wall of the hollow block. A fourth spring is fixedly connected between the support frame and the push block. A rectangular plate for pushing the push block is fixedly connected to the inner wall of the connecting frame. A connecting line is fixedly connected between the output end of the electric telescopic rod and the bottom surface of the connecting frame. An air guiding groove communicating with the circular groove and the hollow block is formed on the inner wall of the guiding groove.

[0012] A sliding groove is formed on the inner wall of the solid-liquid separator. A slider is slidably connected to the inner wall of the sliding groove. A rotating shaft is rotatably connected to the side of the slider away from the sliding groove. The connecting frame is fixedly connected to the rotating shaft. A clamping groove is formed on the rotating shaft. A driving groove corresponding to the clamping groove is formed on the slider. A clamping block engaging with the clamping groove is slidably connected in the driving groove. A disengaging component for disengaging the clamping block is arranged inside the slider.

[0013] The separation component includes an electromagnet fixedly connected to the inner wall of the driving groove. The clamping block is made of a magnetic material magnetically attracted to the electromagnet. A fifth spring is fixedly connected between the clamping block and the electromagnet. A round rod is fixedly connected to the surface of the guiding groove.

[0014] A production method of polyaluminum chloride flocculant uses the above-mentioned production device of polyaluminum chloride flocculant. The method includes the following steps: S1: Use a crusher to crush the aluminum electrolysis waste residue raw material to 80-100 mesh. The aluminum electrolysis waste residue raw material contains 40-60% Al2O3. In an acid-resistant reaction kettle, mix the aluminum slag with hydrochloric acid with a mass fraction of 15%-20% at a ratio of 1:2-3, add 0.5% sodium fluoride, stir and react at 60-80 °C for 2 hours, and use a solid-liquid separator to filter and remove insoluble substances to obtain an AlCl3 solution. S2: In a multi-stage temperature-controlled reaction kettle, mix the AlCl3 solution and calcium aluminate powder at an Al / Ca molar ratio of 3:1. First stage: React at 40-50 °C for 1 hour, pH = 2.5-3.0; Second stage: Raise the temperature to 70-80 °C, slowly dropwise add NaOH solution until pH = 4.0-4.5, and react for 2 hours; Add 0.1% sodium phosphate as a stabilizer. S3: The reaction solution is aged in a ripening tank at a temperature of 50 °C for 24 hours, centrifuged and separated by a high-speed centrifuge to remove precipitates, and the filtrate is spray-dried in a spray drying tower to obtain a solid PAC product.

[0015] The usage steps of the solid-liquid separator in step S1 include: A1: After the acid dissolution reaction of the raw materials, inject the mixture formed by the insoluble substances and the AlCl3 solution into the hollow groove from the feed pipe. After the hollow groove is filled, align the connecting hole with the moving groove. At this time, the mixture will be discharged onto the filter screen for solid-liquid separation. A2: Make the output end of the electric telescopic rod reciprocate, so that the output end of the electric telescopic rod pushes the filter screen to vibrate, and make the insoluble substances vibrate and slide on the inclined filter screen. A3: The AlCl3 solution filtered by the filter screen will enter the first collection tank, and the insoluble substances will enter the second collection tank. The AlCl3 solution is discharged from the discharge pipe, and the insoluble substances are discharged from the discharge tank.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention injects the mixture into the solid-liquid separator from the feed pipe. At this time, the mixture passes through the inclined filter screen, so that the insoluble matter is filtered and retained on the screen screen, and the liquid enters the first collecting tank. When the solid-liquid separation is performed, the output end of the electric telescopic rod is reciprocated, so that the output end of the electric telescopic rod pushes the connecting frame to shake, and then the filter screen is shaken. At this time, the insoluble matter shakes and slides on the inclined filter screen, so that the insoluble matter will not accumulate at the feed of the feed pipe, and the filter screen pores in the water inlet area are prevented from being blocked over a large area, so as to improve the solid-liquid separation efficiency of the solid-liquid separator.

[0017] 2. When the mixture is injected from the feed pipe, the mixture enters the hollow groove, is then diverted by the discharge groove, and finally is discharged evenly from the discharge groove, so that the mixture can fall onto the filter net more evenly, thereby improving the filtering effect and filtering efficiency of the mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a structural schematic diagram of the solid-liquid separator in the present invention; Figure 2 It is a schematic diagram of the internal structure of the solid-liquid separator in the present invention; Figure 3 yes Figure 2 A magnified image of point A; Figure 4 It is a schematic diagram of the internal structure of the connection block in the present invention; Figure 5 yes Figure 2 The enlarged view of point B; Figure 6 It is a partial structural cross-sectional view of the solid-liquid separator in the present invention; Figure 7 yes Figure 6 Enlarged view of point C; Figure 8 and Figure 9 It is a flow chart of the method in the present invention.

[0020] In the figure: 1. Solid-liquid separator; 2. Support leg; 3. Feed pipe; 4. Discharge pipe; 5. First collection tank; 6. Guide groove; 7. Connection frame; 8. Filter screen; 9. Electric telescopic rod; 10. Fixed plate; 11. Second collection tank; 12. First sealing plate; 13. Connection block; 14. Hollow groove; 15. Discharge groove; 16. Moving groove; 17. Second sealing plate; 18. Connection hole; 19. Connection pipe; 20. Third collection tank; 21. Penetration hole; 22. Liquid outlet groove; 23. Pressing plate; 24. Circular groove; 25. Push rod; 26. Hollow block; 27. Air guide groove; 28. Push block; 29. Rectangular plate; 30. Slide groove; 31. Elastic block; 32. Driving groove; 33. Electromagnet; 34. Clamping block; 35. Clamping groove; 36. Rotating shaft; 37. Slide block; 38. Round rod; 39. Connecting line. Detailed implementation manners

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0022] Example 1: As Figures 1 to 5 shown, a production device for polyaluminum chloride flocculant described in an embodiment of the present invention includes a solid-liquid separator 1; a feed pipe 3 is communicated with the top surface of the solid-liquid separator 1, and a discharge pipe 4 is communicated with the bottom surface of the solid-liquid separator 1; a first collection tank 5 is opened in the solid-liquid separator 1, a connection frame 7 arranged obliquely is slidably connected in the solid-liquid separator 1, and a filter screen 8 is fixedly connected to the inner wall of the connection frame 7; a support plate is fixedly connected to the inner wall of the solid-liquid separator 1, and an electric telescopic rod 9 for pushing the connection frame 7 is fixedly connected to the top surface of the support plate; a group of fixed plates 10 are fixedly connected to the inner wall of the solid-liquid separator 1, and a first spring is fixedly connected between the top surface of the fixed plate 10 and the connection frame 7. When the raw materials in this application need to remove insoluble substances after the acid dissolution reaction, the mixture can be injected into the solid-liquid separator 1 from the feed pipe 3. At this time, the mixture will pass through the obliquely arranged filter screen 8, so that the insoluble substances are filtered and remain on the screen, and the liquid enters the first collection tank 5. When performing solid-liquid separation, the output end of the electric telescopic rod 9 is reciprocated, so that the output end of the electric telescopic rod 9 pushes the connection frame 7 to vibrate, and then the filter screen 8 vibrates. At this time, the insoluble substances vibrate and slide on the inclined filter screen 8, so that the insoluble substances will not accumulate at the feeding place of the feed pipe 3, preventing the filter pores in the water inlet area from being blocked in a large area, so as to improve the efficiency of solid-liquid separation of the solid-liquid separator 1.

[0023] A guiding groove 6 is formed inside the solid-liquid separator 1. The guiding groove 6 is inclined and communicates with the first collection tank 5. A second collection tank 11 is formed inside the solid-liquid separator 1. The bottom surface of the second collection tank 11 is inclined. A discharge groove is formed on the side wall of the solid-liquid separator 1. A first sealing plate 12 is arranged in the discharge groove. When the mixture in this application is subjected to solid-liquid separation, part of the liquid will flow onto the guiding groove 6, and then be guided by the guiding groove 6 into the first collection tank 5, and finally can be centrally discharged from the discharge pipe 4. The insoluble matter will slide on the filter screen 8 and then fall into the second collection tank 11 for collection. When discharging the insoluble matter, the first sealing plate 12 can be removed from the discharge groove, and then the insoluble matter will be discharged from the second collection tank 11.

[0024] A connecting block 13 is arranged at the bottom end of the feed pipe 3. A hollow groove 14 is formed inside the connecting block 13. The bottom surface of the inner wall of the connecting block 13 is high in the middle and low on both sides. A group of discharge grooves 15 communicating with the hollow groove 14 are formed on the bottom surface of the connecting block 13. When the mixture in this application is injected from the feed pipe 3, it will enter the hollow groove 14, and then be shunted by the discharge grooves 15, and finally be evenly discharged from the discharge grooves 15, so that the mixture can fall onto the filter screen 8 more evenly, so as to improve the filtering effect and filtering efficiency of the mixture.

[0025] A moving groove 16 is formed inside the connecting block 13. The moving groove 16 communicates with the discharge groove 15. A second sealing plate 17 is hermetically and slidably connected in the moving groove 16. The second sealing plate 17 is used to seal the discharge groove 15. A connecting groove corresponding to the discharge groove 15 is formed on the second sealing plate 17. The output end of the electric telescopic rod 9 is fixedly connected with a hollow elastic block 31. A connecting pipe 19 is communicated between the elastic block 31 and the hollow groove 14. A second spring is fixedly connected between the side of the second sealing plate 17 far away from the connecting pipe 19 and the inner wall of the hollow groove 14. The second sealing plate 17 in this application can seal the discharge chute 15. At this time, the mixture is injected into the hollow groove 14 and stored in the hollow groove 14. When there is a large amount of mixture stored in the hollow groove 14, the electric telescopic rod 9 is started, so that the output end of the electric telescopic rod 9 moves upward to push the connecting frame 7. At this time, the connecting frame 7 and the output end of the electric telescopic rod 9 will generate a squeezing force on the elastic block 31, so that the gas in the elastic block 31 can enter the moving groove 16 through the connecting pipe 19. At this time, the gas will push the second sealing plate 17, so that the connecting hole 18 is aligned with the moving groove 16. At this time, the mixture will be discharged from the discharge chute 15 at the same time, so as to further improve the uniformity of the mixture discharge. When it is necessary to seal the discharge chute 15, let the output end of the electric telescopic rod 9 move downward, so that the elastic block 31 no longer contacts the connecting frame 7. At this time, the second sealing plate 17 will lose the thrust, so that the second spring will push the second sealing plate 17 to reset, so as to let the second sealing plate 17 seal the discharge chute 15. The bottom surface of the connecting block 13 is provided with an exhaust hole communicating with the moving groove 16. When the second sealing plate 17 moves toward the second spring side, the second sealing plate 17 will push the gas in the moving groove 16, and at this time the gas can be discharged from the exhaust hole, so that the second sealing plate 17 can slide normally.

[0026] A third collection tank 20 is provided in the solid-liquid separator 1. An inclined liquid discharge tank 22 is provided in the solid-liquid separator 1. Both ends of the liquid discharge tank 22 communicate with the third collection tank 20 and the first collection tank 5 respectively. A plurality of groups of permeation holes 21 are provided between the third collection tank 20 and the second collection tank 11; since the separation time of the mixture is short during solid-liquid separation, it is inevitable that the surface of the insoluble matter will remain with AlCl3 solution. At this time, the insoluble matter can be allowed to stand in the second collection tank 11 for a period of time, so that the AlCl3 solution enters the third collection tank 20 through the permeation holes 21, and finally enters the first collection tank 5 from the liquid discharge tank 22 for centralized discharge.

[0027] A circular groove 24 communicating with a second collection tank 11 is formed in the solid-liquid separator 1. A push rod 3825 is hermetically and slidably connected in the circular groove 24. A third spring is fixedly connected between the side of the push rod 3825 close to the first collection tank 5 and the inner wall of the circular groove 24. A pressing plate 23 is fixedly connected to the side of the push rod 3825 away from the third spring. A hollow block 26 is fixedly connected to the inner wall of the guiding groove 6. A pushing block 28 is hermetically and slidably connected to the inner wall of the hollow block 26. A support frame is fixedly connected to the inner wall of the hollow block 26. A fourth spring is fixedly connected between the support frame and the pushing block 28. A rectangular plate 29 for pushing the pushing block 28 is fixedly connected to the inner wall of the connecting frame 7. A connecting wire 39 is fixedly connected between the output end of the electric telescopic rod 9 and the bottom surface of the connecting frame 7. An air guiding groove 27 communicating with the circular groove 24 and the hollow block 26 is formed in the inner wall of the guiding groove 6. In this application, when the output end of the electric telescopic rod 9 moves downward to pull the connecting wire 39, the connecting wire 39 will pull the connecting frame 7 downward, so that the rectangular plate 29 presses the pushing block 28. At this time, the pushing block 28 will push the gas in the hollow block 26 into the circular groove 24 through the air guiding groove 27, so that the gas pushes the push rod 3825, causing the push rod 3825 to push the pressing plate 23, and the pushing plate presses the insoluble substances in the second collection tank 11, so that the AlCl3 solution can be better separated from the insoluble substances, so as to further improve the separation effect of the AlCl3 solution on the insoluble substances.

[0028] Embodiment 2: As Figures 6 to 7 shown, compared with Embodiment 1, another implementation manner of the present invention is: a sliding groove 30 is formed in the inner wall of the solid-liquid separator 1. A slider 37 is slidably connected to the inner wall of the sliding groove 30. A rotating shaft 36 is rotatably connected to the side of the slider 37 away from the sliding groove 30. The connecting frame 7 is fixedly connected to the rotating shaft 36. A clamping groove 35 is formed in the rotating shaft 36. A driving groove 32 corresponding to the clamping groove 35 is formed in the slider 37. A clamping block 34 clamped with the clamping groove 35 is slidably connected in the driving groove 32. A disengaging component for disengaging the clamping block 34 is arranged in the slider 37. After the mixture in this application is filtered on the filter net 8, the disengaging component can be used to disengage the clamping block 34 from the clamping groove 35. At this time, the rotating shaft 36 will rotate due to the weight of the connecting frame 7, so that the connecting frame 7 rotates, so as to increase the inclination angle of the filter net 8, thereby further promoting the discharge effect of the insoluble substances from the filter net 8.

[0029] The detachment component includes an electromagnet 33 fixedly connected to the inner wall of the driving groove 32. The clamping block 34 is made of a magnetic material magnetically attracted to the electromagnet 33. A fifth spring is fixedly connected between the clamping block 34 and the electromagnet 33. A round rod 38 is fixedly connected to the surface of the guiding groove 6. When the connecting frame 7 needs to rotate in this application, the electromagnet 33 can be used to attract the clamping block 34, so that the clamping block 34 disengages from the clamping groove 35. At this time, the rotating shaft 36 can rotate, so that the connecting frame 7 can rotate, thereby increasing the inclination angle of the filter net 8. After the filter net 8 rotates, it will contact the round rod 38. When the connecting frame 7 needs to be reset, the output end of the electric telescopic rod 9 can be used to move downward. At this time, the connecting line 39 will pull the connecting frame 7, so that the slider 37 slides downward, so that the clamping groove 35 on the rotating shaft 36 can be aligned with the driving groove 32. At this time, the clamping block 34 will be clamped with the clamping groove 35 under the push of the fifth spring.

[0030] As Figures 8 to 9 shown, a production method of polyaluminum chloride flocculant uses the above-mentioned production device of polyaluminum chloride flocculant. The method includes the following steps: S1: Use a crusher to crush the aluminum electrolysis waste residue raw material to 80-100 mesh. The aluminum electrolysis waste residue raw material contains 40-60% Al2O3. In an acid-resistant reaction kettle, mix the aluminum slag with hydrochloric acid with a mass fraction of 15%-20% at a ratio of 1:2-3, add 0.5% sodium fluoride, and stir and react at 60-80°C for 2 hours. Use a solid-liquid separator 1 to filter and remove insoluble substances to obtain an AlCl3 solution. S2: In a multi-stage temperature-controlled reaction kettle, mix the AlCl3 solution and calcium aluminate powder at an Al / Ca molar ratio of 3:1. First stage: React at 40-50°C for 1 hour, pH = 2.5-3.0; Second stage: Raise the temperature to 70-80°C, slowly add NaOH solution dropwise until pH = 4.0-4.5, and react for 2 hours; Add 0.1% sodium phosphate as a stabilizer. S3: The reaction liquid is aged in a ripening tank at a temperature of 50°C for 24 hours, centrifuged and separated by a high-speed centrifuge to remove the precipitate, and the filtrate is spray-dried in a spray drying tower to obtain a solid PAC product.

[0031] The usage steps of the solid-liquid separator 1 in the step S1 include: A1: After the raw materials are acid-dissolved and reacted, the mixture formed by the insoluble substances and the AlCl3 solution is injected into the hollow groove 14 from the feed pipe 3. After the hollow groove 14 is filled, align the connecting hole 18 with the moving groove 16. At this time, the mixture will be discharged onto the filter net 8 for solid-liquid separation. A2: Make the output end of the electric telescopic rod 9 reciprocate, so that the output end of the electric telescopic rod 9 pushes the filter net 8 to vibrate, and make the insoluble substances vibrate and slide on the inclined filter net 8. A3: The AlCl3 solution filtered by the filter 8 will enter the first collecting tank 5, and the insoluble matter will enter the second collecting tank 11. The AlCl3 solution will be discharged from the discharge pipe 4, and the insoluble matter will be discharged from the discharge tank.

[0032] Working principle: by injecting the mixture from the feed pipe 3 into the solid-liquid separator 1, the mixture will pass through the inclined filter screen 8, so that the insoluble matter is filtered and retained on the screen, and the liquid enters the first collecting tank 5. When the solid-liquid separation is performed, the output end of the electric telescopic rod 9 is reciprocated, so that the output end of the electric telescopic rod 9 pushes the connecting frame 7 to shake, and then the filter screen 8 is shaken. At this time, the insoluble matter shakes and slides on the inclined filter screen 8, so that the insoluble matter will not accumulate at the feed of the feed pipe 3, preventing the water inlet area from The pores of the filter screen are blocked in a large area to improve the efficiency of solid-liquid separation of the solid-liquid separator 1; when the mixture in the present application is subjected to solid-liquid separation, part of the liquid will flow to the guide groove 6, and then be guided by the guide groove 6 to the first collecting tank 5, and finally can be discharged from the discharge pipe 4 in a centralized manner, and the insoluble matter will slide on the filter screen 8, and then fall into the second collecting tank 11 for collection. When the insoluble matter is discharged, the first sealing plate 12 can be removed from the discharge tank, and then the insoluble matter will be discharged from the second collecting tank 11; When the mixture in this application is injected from the feed pipe 3, it will enter the hollow groove 14, and then be shunted by the discharge groove 15, and finally uniformly discharged from the discharge groove 15, so that the mixture can fall more uniformly onto the filter screen 8, thereby improving the filtering effect and efficiency of the mixture; the second sealing plate 17 in this application can seal the discharge groove 15. At this time, when the mixture is injected into the hollow groove 14, it will be stored in the hollow groove 14. When there is a large amount of mixture stored in the hollow groove 14, start the electric telescopic rod 9, so that the output end of the electric telescopic rod 9 moves upward to push the connecting frame 7. At this time, the connecting frame 7 and the output end of the electric telescopic rod 9 will generate a squeezing force on the elastic block 31, so that the gas in the elastic block 31 can enter the moving groove 16 from the connecting pipe 19. At this time, the gas will push the second sealing plate 17, so that the connecting hole 18 is aligned with the moving groove 16. At this time, the mixture will be discharged from the discharge groove 15 at the same time, so as to further improve the uniformity of the mixture discharge. When it is necessary to seal the discharge groove 15, let the output end of the electric telescopic rod 9 move downward, so that the elastic block 31 no longer contacts the connecting frame 7. At this time, the second sealing plate 17 will lose the thrust, so that the second spring will push the second sealing plate 17 to reset, so as to let the second sealing plate 17 seal the discharge groove 15. An exhaust hole communicating with the moving groove 16 is opened on the bottom surface of the connecting block 13. When the second sealing plate 17 moves toward the second spring side, the second sealing plate 17 will push the gas in the moving groove 16, and at this time the gas can be discharged from the exhaust hole, so that the second sealing plate 17 can slide normally; Since the separation time of the mixture is short during solid-liquid separation, it is inevitable that the AlCl3 solution will remain on the surface of the insoluble matter. At this time, the insoluble matter can be allowed to stand in the second collection tank 11 for a period of time, so that the AlCl3 solution enters the third collection tank 20 from the permeation holes 21, and finally enters the first collection tank 5 from the liquid outlet tank 22 for centralized discharge; this application uses the output end of the electric telescopic rod 9 to move downward to pull the connecting wire 39. At this time, the connecting wire 39 will pull the connecting frame 7 downward, so that the rectangular plate 29 squeezes the push block 28. At this time, the push block 28 will push the gas in the hollow block 26 into the circular groove 24 from the air guide groove 27, so that the gas pushes the push rod 3825, so that the push rod 3825 pushes the pressing plate 23, and the push plate squeezes the insoluble matter in the second collection tank 11, so that the AlCl3 solution can be better separated from the insoluble matter, so as to further improve the separation effect of the AlCl3 solution on the insoluble matter.

[0033] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. According to the standard of the observer's perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0035] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A production device for polyaluminum chloride flocculant, comprising a solid-liquid separator (1); a feed pipe (3) is communicated with the top surface of the solid-liquid separator (1), and a discharge pipe (4) is communicated with the bottom surface of the solid-liquid separator (1); It is characterized in that: A first collection tank (5) is arranged in the solid-liquid separator (1), a connection frame (7) which is obliquely arranged is slidably connected in the solid-liquid separator (1), and a filter screen (8) is fixedly connected to the inner wall of the connection frame (7); A support plate is fixedly connected to the inner wall of the solid-liquid separator (1), and an electric telescopic rod (9) for pushing the connection frame (7) is fixedly connected to the top surface of the support plate; A group of fixing plates (10) are fixedly connected to the inner wall of the solid-liquid separator (1), and a first spring is fixedly connected between the top surface of the fixing plate (10) and the connection frame (7).

2. The production device of a polyaluminum chloride flocculant according to claim 1, characterized in that: A guiding groove (6) is arranged in the solid-liquid separator (1), the guiding groove (6) is obliquely arranged and communicated with the first collection tank (5), a second collection tank (11) is arranged in the solid-liquid separator (1), the bottom surface of the second collection tank (11) is obliquely arranged, and a discharge groove is arranged on the side wall of the solid-liquid separator (1), and a first sealing plate (12) is arranged in the discharge groove.

3. The production device of a polyaluminum chloride flocculant according to claim 2, characterized in that: A connection block (13) is arranged at the bottom end of the feed pipe (3), a hollow groove (14) is arranged in the connection block (13), the bottom surface of the inner wall of the connection block (13) is high in the middle and low on both sides, and a group of discharge grooves (15) communicated with the hollow groove (14) are arranged on the bottom surface of the connection block (13).

4. The production device of a polyaluminum chloride flocculant according to claim 3, characterized in that: A moving groove (16) is arranged in the connection block (13), the moving groove (16) is communicated with the discharge groove (15), a second sealing plate (17) is hermetically slidably connected in the moving groove (16), the second sealing plate (17) is used for sealing the discharge groove (15), a connection groove corresponding to the discharge groove (15) is arranged on the second sealing plate (17), the output end of the electric telescopic rod (9) is fixedly connected with a hollow elastic block (31), a connection pipe (19) is communicated between the elastic block (31) and the hollow groove (14), and a second spring is fixedly connected between the side of the second sealing plate (17) far away from the connection pipe (19) and the inner wall of the hollow groove (14).

5. The production device of a polyaluminum chloride flocculant according to claim 4, characterized in that: A third collection tank (20) is arranged in the solid-liquid separator (1), a liquid outlet groove (22) which is obliquely arranged is arranged in the solid-liquid separator (1), two ends of the liquid outlet groove (22) are respectively communicated with the third collection tank (20) and the first collection tank (5), and a plurality of groups of permeation holes (21) are arranged between the third collection tank (20) and the second collection tank (11).

6. The production device of a polyaluminum chloride flocculant according to claim 5, characterized in that: A circular groove (24) communicating with a second collection tank (11) is formed inside the solid-liquid separator (1). A push rod (25) is hermetically and slidably connected inside the circular groove (24). A third spring is fixedly connected between one side of the push rod (25) close to the first collection tank (5) and the inner wall of the circular groove (24). A pressing plate (23) is fixedly connected to the side of the push rod (25) away from the third spring. A hollow block (26) is fixedly connected to the inner wall of the guiding groove (6). A push block (28) is hermetically and slidably connected inside the inner wall of the hollow block (26). A support frame is fixedly connected to the inner wall of the hollow block (26). A fourth spring is fixedly connected between the support frame and the push block (28). A rectangular plate (29) for pushing the push block (28) is fixedly connected to the inner wall of the connection frame (7). A connecting wire (39) is fixedly connected between the output end of the electric telescopic rod (9) and the bottom surface of the connection frame (7). An air guiding groove (27) communicating with the circular groove (24) and the hollow block (26) is formed in the inner wall of the guiding groove (6).

7. An apparatus for producing a polyaluminum chloride flocculant according to claim 6, characterized in that: A sliding groove (30) is formed in the inner wall of the solid-liquid separator (1). A slider (37) is slidably connected to the inner wall of the sliding groove (30). A rotating shaft (36) is rotatably connected to the side of the slider (37) away from the sliding groove (30). The connection frame (7) is fixedly connected to the rotating shaft (36). A clamping groove (35) is formed on the rotating shaft (36). A driving groove (32) corresponding to the clamping groove (35) is formed in the slider (37). A clamping block (34) clamped with the clamping groove (35) is slidably connected in the driving groove (32). A separating assembly for separating the clamping block (34) is arranged inside the slider (37).

8. A production device for polyaluminum chloride flocculant according to claim 7, characterized in that: The separating assembly includes an electromagnet (33) fixedly connected to the inner wall of the driving groove (32). The clamping block (34) is made of a magnetic material magnetically attracted to the electromagnet (33). A fifth spring is fixedly connected between the clamping block (34) and the electromagnet (33). A round rod (38) is fixedly connected to the surface of the guiding groove (6).

9. A production method of polyaluminum chloride flocculant, which uses a production device of polyaluminum chloride flocculant described in claim 8, and is characterized in that: The method includes the following steps: S1: Using a crusher to crush the aluminum electrolysis waste residue raw material to 80 - 100 mesh. The aluminum electrolysis waste residue raw material contains 40 - 60% Al2O3. Mix the aluminum slag with hydrochloric acid with a mass fraction of 15% - 20% at a ratio of 1:2 - 3 in an acid-resistant reaction kettle, add 0.5% sodium fluoride, stir and react at 60 - 80 °C for 2 hours, and use the solid-liquid separator (1) to filter and remove insoluble substances to obtain an AlCl3 solution; S2: Mix the AlCl3 solution and calcium aluminate powder in a multi-stage temperature-controlled reaction kettle at an Al / Ca molar ratio of 3:

1. First stage: React at 40 - 50 °C for 1 hour, pH = 2.5 - 3.0; Second stage: Heat up to 70 - 80 °C, slowly add NaOH solution until pH = 4.0 - 4.5, and react for 2 hours; Add 0.1% sodium phosphate as a stabilizer; S3: The reaction liquid is aged at 50 °C in an aging tank for 24 hours, centrifuged and separated by a high-speed centrifuge to remove precipitates, and the filtrate is spray-dried in a spray drying tower to obtain a solid PAC product.

10. A production method of polyaluminum chloride flocculant according to claim 9, characterized in that: The usage steps of the solid-liquid separator (1) described in step S1 include: A1: After the acid dissolution reaction of the raw materials, the mixture formed by the insoluble substances and the AlCl3 solution is injected into the hollow groove (14) from the feed pipe (3). After the hollow groove (14) is filled, the connecting hole (18) is aligned with the moving groove (16), and at this time, the mixture will be discharged onto the filter screen (8) for solid-liquid separation; A2: The output end of the electric telescopic rod (9) reciprocates, so that the output end of the electric telescopic rod (9) pushes the filter screen (8) to vibrate, and the insoluble substances vibrate and slide on the inclined filter screen (8); A3: The AlCl3 solution filtered by the filter screen (8) will enter the first collection tank (5), and the insoluble substances will enter the second collection tank (11). The AlCl3 solution is discharged from the discharge pipe (4), and the insoluble substances are discharged from the discharge tank.

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