Real stone paint wastewater treatment device and process

Abstract

The invention discloses a stone-like coating wastewater treatment device and process, the stone-like coating wastewater is discharged into a recoverer, hydrochloric acid is used for adjusting the PH value to be acidic, a coupling agent is added into the recoverer for stirring reaction, so that emulsion in stone-like coating and gravel are subjected to chemical reaction adhesion, then the recoverer recovers and separates the modified gravel, and the modified gravel is recycled and separated to obtain the stone-like coating wastewater. Introducing the treated acidic wastewater into a sedimentation tank, then introducing sodium hydroxide into the sedimentation tank to adjust the pH value to be alkalescent, adding a flocculating agent for flocculent precipitation, discharging supernatant after flocculent precipitation into an oxidation tank, introducing ozone for oxidation treatment, and finally discharging micromolecular organic matters after oxidation treatment into a biological treatment tank for treatment. According to the invention, the silane coupling agent is added into the wastewater, so that the gravel in the wastewater is combined with the emulsion, and the recoverer is used for recovering and separating the gravel, so that not only is the gravel resource recovered, but also the emulsion treatment pressure in the subsequent working section is reduced, and the wastewater treatment effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to a device and process for treating real stone paint wastewater. Background Art

[0002] Real stone paint is a decorative coating commonly used on building exteriors. Its effect mimics the texture of natural stone, hence the name "imitation stone paint." The main components of real stone paint are emulsion, sand and gravel, additives, and water. Emulsions include acrylic emulsions, silicone acrylic emulsions, and pure acrylic emulsions, accounting for 30-40%. The sand and gravel typically have a particle size between 40-120 mesh and are usually glass sand or quartz sand. The production process of real stone paint generates a large amount of wastewater. Due to the large amount of emulsion and stone powder in real stone paint, COD and SS levels are extremely high, requiring treatment before discharge.

[0003] Patent CN102992534A discloses a method for treating paint wastewater. First, the paint wastewater is collected in a sewage pool, and a detackifier is added to the sewage pool to cause the suspended matter in the paint wastewater in the sewage pool to begin to condense. The paint wastewater in the sewage pool is then pumped into a flocculation pipeline using a water pump. At the same time, sodium hydroxide, polyaluminum chloride, polyacrylamide and PF iron powder flocculant are added to the flocculation pipeline in sequence using a dosing device to generate flocs wrapped with PF iron powder in the paint wastewater. The paint wastewater in the flocculation pipeline is then pumped into a separation device. In the separation device, the flocs wrapped with PF iron powder are magnetized and adsorbed on the magnetic component using a magnetic component. The flocs on the magnetic component are then separated, and the clean water after the flocs are separated is introduced into a clean water pool for use. This treatment method is to eliminate viscosity first and then flocculate, but the subsequent paint wastewater still contains a large amount of COD, and the wastewater treatment is not thorough.

[0004] Patent CN114380417A discloses a low-cost paint wastewater treatment method, which first transports the paint wastewater to a reaction tank 1, adjusts the pH, then adds a detackifier to detackify the paint wastewater to obtain an intermediate liquid 1, then transports the intermediate liquid 1 to a reaction tank 2, adjusts the pH to 3-4, introduces ozone, and then adds a coagulant for flocculation and precipitation, then transports the supernatant to a clear water tank 1 for standby use, transports the precipitate to a collection tank, then ultrasonically treats the precipitate in the collection tank, and then filter-presses and dehydrates it, and the removed water is transported to a clear water tank 2 for standby use, and finally the clear water tank 1 is cleaned. The liquid in the clear water tank 2 is treated for organic matter and sterilization, and then transported to the paint wastewater for recycling. This method adds ozone as an oxidant to treat organic matter in the water, making the wastewater treatment more thorough. However, this method is not suitable for wastewater treatment of real stone paint. The emulsion in real stone paint accounts for a large proportion, and the cost of direct oxidation treatment is relatively high. At the same time, sand and gravel are directly precipitated together with other components under the action of flocculants, which will also cause waste of available sand and gravel resources. How to recycle sand and gravel and reduce the treatment pressure and cost of the later flocculation tank and oxidation tank are the key concerns of enterprises. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a real stone paint wastewater treatment device and process to solve the problem that sand and emulsion resources cannot be recycled in the existing paint wastewater treatment process.

[0006] The purpose of the present invention is achieved through the following technical solutions: A real stone paint wastewater treatment process, comprising the following steps:

[0007] S1. Discharge the real stone paint wastewater into the recovery device and use hydrochloric acid to adjust the pH value to acidic;

[0008] S2. Add a coupling agent to the recycling device and stir the reaction to make the emulsion in the real stone paint adhere chemically to the sand and gravel;

[0009] S3. The recycler recovers and separates the modified sand and gravel, and the treated acidic wastewater is passed into the sedimentation tank;

[0010] S4. Sodium hydroxide is introduced into the sedimentation tank to adjust the pH value to a weak alkaline state, and a flocculant is added for flocculation and precipitation;

[0011] S5. The supernatant after flocculation and precipitation is discharged into an oxidation tank and oxidized by ozone;

[0012] S6. The small molecular organic matter after oxidation treatment is discharged into the biological treatment pool for treatment.

[0013] Preferably, the coupling agent is one or more of an aminosilane coupling agent or a vinylsilane coupling agent.

[0014] Preferably, in step S1, the pH value adjusted with hydrochloric acid is 3-6.

[0015] Preferably, in step S4, the pH value adjusted using sodium hydroxide is 7-8.

[0016] The present invention also provides a real stone paint wastewater treatment device, which is a recovery device, comprising:

[0017] A tank body, wherein a drain pipe is provided at the bottom of the tank body, a first feeding pipe and a second feeding pipe are provided in the middle of the tank body, and a material receiving bin is provided on the side of the tank body;

[0018] An outer cylinder, the outer cylinder is located in the tank body, the outer cylinder is provided with a plurality of first water filtering holes, a first inner cylinder and a second inner cylinder are provided in the outer cylinder, the first inner cylinder and the second inner cylinder are located above the interior of the outer cylinder, the outer cylinder and the first inner cylinder and the second inner cylinder form a first material conveying channel, a first material conveying plate, a second material conveying plate and a return pipe are provided in the first material conveying channel, the return pipe passes through the outer cylinder and the first inner cylinder in sequence, and is located between the first material conveying plate and the second material conveying plate, the first material conveying plate and the second material conveying plate are both spiral-shaped, the first material conveying plate extends from the lower part of the outer cylinder to the upper part of the first inner cylinder, the first material conveying plate is tightly attached to the inner wall of the outer cylinder and rotates to convey material upward, the second material conveying plate is fixedly connected to the second inner cylinder, and rotates to convey material upward;

[0019] a first stirring paddle and a second stirring paddle, wherein the first stirring paddle and the second stirring paddle are located in the outer cylinder, and the fluid propulsion directions of the first stirring paddle and the second stirring paddle are arranged opposite to each other so that the wastewater flows out of the outer cylinder through the first water filter hole;

[0020] A first cone plate and a second cone plate, both of which are inverted cone plate structures, form a second material delivery channel, the first material delivery channel is sealed and connected to the second material delivery channel, a third material delivery plate is provided in the second material delivery channel, the third material delivery plate is closely attached to the upper surface of the first cone plate, and is spirally distributed upward from the bottom of the first cone plate, the third material delivery plate is rotatably arranged in the second material delivery channel, and the first cone plate is provided with a plurality of second water filter holes;

[0021] A material receiving bin is located on the side wall of the tank body and is used to receive sand and gravel discharged from the second material delivery channel.

[0022] Preferably, it also includes a first rotating shaft, a first motor, a second rotating shaft, and a second motor. The first rotating shaft is inserted into the second rotating shaft, and the two are rotatably connected. The first rotating shaft is fixedly connected to the first stirring paddle. The output end bevel gear of the first motor is meshed and connected to the first rotating shaft. The second rotating shaft is fixedly connected to the second stirring paddle. The output end bevel gear of the second motor is meshed and connected to the second rotating shaft.

[0023] Preferably, a first support rod is provided on the first rotating shaft, and the ends of the first support rod are fixedly connected to the first rotating shaft and the first feed plate respectively; a second support rod is provided on the second rotating shaft, and the ends of the second support rod are fixedly connected to the second rotating shaft and the second inner cylinder respectively; and the second inner cylinder is fixedly connected to the second feed plate.

[0024] Preferably, it also includes a third inner cylinder, which is located above the second inner cylinder and is rotatably sealed with the second inner cylinder, a sealing ring sealed with the second cone plate is provided in the middle of the third inner cylinder, an outer edge is provided on the upper part of the third inner cylinder, a limiting rod is vertically provided on the outer edge, one end of the limiting rod is fixedly connected to the outer edge, and the other end of the limiting rod passes through the tank body and is slidably connected to the tank body, a fourth motor and an adjusting screw are provided on the top of the tank body, one end of the adjusting screw is fixedly connected to the output end of the fourth motor, and the other end of the adjusting screw passes through the tank body and the outer edge in sequence, and is rotatably connected to the tank body, and is threadedly connected to the outer edge.

[0025] Preferably, a retaining ring is provided on the second cone plate, the retaining ring is fixedly connected to the second cone plate, an inner gear ring is provided on the retaining ring, a third motor is provided on the tank body, and a gear meshing with the inner gear ring is provided at the output end of the third motor, and the third motor is used to drive the retaining ring to rotate.

[0026] Preferably, the tank body is provided with an exhaust pipe for extracting a negative pressure from the cavity between the first cone plate, the tank body and the outer cylinder.

[0027] The present invention has the following advantages:

[0028] 1. Provide a real stone paint wastewater treatment process. By adding a silane coupling agent to the wastewater, the silane coupling agent acts as a bridge to combine the sand and gravel in the wastewater with the emulsion. The sand and gravel are subsequently recovered and separated using a recycler. This not only recycles and utilizes sand and gravel resources and avoids discarding them as general waste, but also reduces the problem of high COD content caused by the emulsion in the subsequent wastewater treatment, thereby reducing the processing pressure of the subsequent process section.

[0029] 2. Provide a special recovery device for real stone paint wastewater treatment. Through the cooperation of the first stirring paddle, the second stirring paddle and the outer cylinder, the super mixing effect of cyclic mixing and convection mixing of wastewater and silane coupling agent is achieved. Under the spiral centrifugal action of the first cone plate, the second cone plate and the third feed plate, the sand and gravel are efficiently separated and screened from the wastewater. The two functions are integrated into one to complete the specialized and efficient treatment function of modified sand and gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the process flow of the present invention;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0032] Figure 3 yes Figure 2 Schematic diagram of the half-section structure;

[0033] Figure 4 yes Figure 2 Schematic diagram of the half-section structure in another direction;

[0034] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0035] In the figure, 1. tank body; 2. drain pipe; 3. first feed pipe; 4. second feed pipe; 5. outer cylinder; 6. first water filter hole; 7. first rotating shaft; 8. first stirring paddle; 9. first motor; 10. second rotating shaft; 11. second stirring paddle; 12. second motor; 13. first inner cylinder; 14. reflux pipe; 15. first feed plate; 16. first support rod; 17. second inner cylinder; 18. second feed plate; 19. second support rod; 20. first cone plate; 21. second cone plate; 22. third feed plate; 23. material retaining ring; 24. inner gear ring; 25. gear; 26. third motor; 27. material collecting bin; 28. sand discharge port; 29. second water filter hole; 30. exhaust pipe; 31. third inner cylinder; 32. sealing ring; 33. outer edge; 34. limit rod; 35. adjusting screw; 36. fourth motor. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0038] like Figure 1 As shown, the real stone paint produced by the company includes 50-60% water, 7-10% bentonite, 30-40% pure acrylic emulsion, 40-120 mesh high-transparency glass sand, thickener, and film-forming agent. The wastewater is generated by cleaning the real stone paint equipment. The wastewater treatment process includes the following steps:

[0039] S1. The real stone paint wastewater is discharged into the recovery device and the pH value is adjusted to 3-6 with hydrochloric acid to facilitate demulsification and reduce viscosity;

[0040] S2. Add aminosilane coupling agent kh550 to the recovery device and stir the reaction, so that the carboxyl group in the emulsion of the real stone paint reacts with the amino group in the coupling agent, and the hydroxyl group on the sand and gravel reacts with the silanol generated by hydrolysis of the coupling agent, so that the pure acrylic emulsion and the sand and gravel undergo a chemical reaction under the action of the coupling agent and adhere to each other, so that the two are combined into one, and the sand and gravel are solubilized and modified;

[0041] S3. The recycler recovers and separates the modified sand and gravel, and the treated acidic wastewater is passed into the sedimentation tank;

[0042] S4. Sodium hydroxide solution was introduced into the sedimentation tank to adjust the pH value to a weak alkaline level of 7-8, and aluminum hydroxide flocculant was added for flocculation and precipitation;

[0043] S5. The supernatant after flocculation and precipitation is discharged into an oxidation tank and oxidized by ozone;

[0044] S6. The small molecular organic matter after oxidation treatment is discharged into the biological treatment pool for treatment.

[0045] The modified sand and gravel have higher water solubility than commercially available sand. Adding it to real stone paint in a certain proportion can improve the stability of the real stone paint.

[0046] After the pure acrylic acid emulsion is combined with sand and gravel, its solubility increases and its precipitation rate decreases, so it must rely on the recoverer of the present invention for specific recovery.

[0047] like Figure 2 As shown, the recoverer includes a tank body 1, a drain pipe 2 is installed at the bottom of the tank body 1, the drain pipe 2 is used to discharge the wastewater after filtering the sand and gravel, and a first feed pipe 3 and a second feed pipe 4 are installed in the middle of the tank body 1. The first feed pipe 3 is used to pass the real stone paint wastewater and hydrochloric acid, and the second feed pipe 4 is used to drip the silane coupling agent to avoid self-polymerization precipitation caused by excessive coupling agent.

[0048] like Figure 3 、 Figure 4 As shown, the interior of the tank body 1 is installed with an outer cylinder 5, a first stirring paddle 8, a second stirring paddle 11, a first cone plate 20, a second cone plate 21, a material receiving bin 27, a first material conveying plate 15, a second material conveying plate 18, and a reflux pipe 14. The outer cylinder 5 is located inside the tank body 1 and is coaxially installed with the tank body 1. A plurality of first water filter holes 6 are provided on the outer cylinder 5. The first water filter holes 6 are evenly spaced around the middle of the outer cylinder 5. The first water filter holes 6 can allow liquid to pass through and retain sand and gravel on the inner wall of the outer cylinder 5.

[0049] The first inner cylinder 13, the second inner cylinder 17 and the third inner cylinder 31 are installed in the outer cylinder 5. The diameters of the first inner cylinder 13, the second inner cylinder 17 and the third inner cylinder 31 are the same. The first inner cylinder 13, the second inner cylinder 17 and the third inner cylinder 31 are distributed from top to bottom. The first inner cylinder 13, the second inner cylinder 17 and the third inner cylinder 31 are located above the inner part of the outer cylinder 5. The outer cylinder 5 and the first inner cylinder 13, the second inner cylinder 17 and the third inner cylinder 31 form a first feeding channel. The first feeding plate 15, the second feeding plate 18 and the return pipe 14 are installed in the first feeding channel. There are multiple return pipes 14, and the return pipes 14 are arranged at intervals around. The return pipes 14 pass through the outer cylinder 5 and the first inner cylinder 13 in sequence, and are located between the first feeding plate 15 and the second feeding plate 18. The flow pipe 14 is sealed and fixedly connected to the outer cylinder 5 and the first inner cylinder 13 respectively. The return pipe 14 can not only guide the liquid outside the outer cylinder 5 to flow back into the first inner cylinder 13, but also can fixedly receive the first inner cylinder 13. The first conveying plate 15 and the second conveying plate 18 are both spiral plates surrounding a cylinder, and their width is equal to the width between the outer cylinder 5 and the first inner cylinder 13. The first conveying plate 15 extends from the lower part of the outer cylinder 5 to the upper part of the first inner cylinder 13. The first conveying plate 15 is close to the inner wall of the outer cylinder 5 and rotates to convey material upward. The first conveying plate 15 can scrape off the sand and gravel deposited on the outer cylinder 5 and convey it upward. The second conveying plate 18 is fixedly connected to the second inner cylinder 17 and also rotates to convey material upward, continuing to transport the material conveyed by the first conveying plate 15 upward.

[0050] The first stirring paddle 8 is located in the outer cylinder 5, the second stirring paddle 11 is located between the first inner cylinder 13, and its height is lower than the reflux pipe 14, and the fluid propulsion directions of the first stirring paddle 8 and the second stirring paddle 11 are arranged opposite to each other so that the wastewater is offset and mixed and then flows out of the outer cylinder 5 through the first water filter hole 6, and the sand and gravel are scraped off by the first conveying plate 15 and transported upward. The first feed pipe 3 and the second feed pipe 4 are installed directly above the first inner cylinder 13 for directly discharging the liquid into the tank body 1.

[0051] The first cone plate 20 and the second cone plate 21 are both inverted cone plate structures. A circular opening is provided in the middle of the first cone plate 20 and the second cone plate 21. The circular opening is used to accommodate the third inner cylinder 31. A sealing ring 32 is installed in the middle of the third inner cylinder 31 to seal with the second cone plate 21. The top of the outer cylinder 5 is welded to seal the edge of the circular opening of the first cone plate 20. The first cone plate 20 and the second cone plate 21 are buckled together to form a second feed channel. The first feed channel is sealed and connected to the second feed channel. The third feed plate 22 is installed in the second feed channel, and the third feed plate 22 is close to the first cone plate The upper surface of the first cone plate 20 and the lower surface of the second cone plate 21 are spirally distributed upward from the bottom of the first cone plate 20. The first cone plate 20 extends spirally upward in an inverted cone shape. The third feed plate 22 is fixedly connected to the inner surface of the second cone plate 21 so that the third feed plate 22 can rotate with the second cone plate 21. A plurality of second water filter holes 29 are opened on the first cone plate 20. The sand and gravel discharged into the second feed channel by the second feed plate 18 has a large water content. The third feed plate 22 continuously pushes the sand and gravel to move outward and upward during the rotation process, and the generated wastewater re-enters the lower part of the tank body 1 through the second water filter holes 29.

[0052] The material receiving bin 27 is an annular structure. The material receiving bin 27 is installed on the side wall of the tank body 1 to receive the sand and gravel discharged from the second feeding channel. The ground of the material receiving bin 27 is a sloped structure that can automatically slide down to collect sand and gravel. A sand discharge port 28 is opened at the bottom of the material receiving bin 27. The upper support of the material receiving bin 27 is fixedly connected to the top surface of the tank body 1 and weighs various accessories installed above.

[0053] The rotation of the first stirring paddle 8 and the first feeding plate 15 depends on the first driving mechanism, and the rotation of the second stirring paddle 11 and the second feeding plate 18 depends on the second driving mechanism. The first driving mechanism includes a first rotating shaft 7, a first motor 9, and a first support rod 16. The second driving mechanism includes a second rotating shaft 10, a second motor 12, and a second support rod 19. The second rotating shaft 10 is a tubular structure. The first rotating shaft 7 is sleeved in the second rotating shaft 10, and the two are rotatably connected. The bottom end of the first rotating shaft 7 is fixedly connected to the first stirring paddle 8. The first motor 9 and the second motor 12 are installed on the top surface of the tank body 1. The output end bevel gear of the first motor 9 is meshed with the first rotating shaft 7. The bottom end of the second rotating shaft 10 is fixedly connected to the second stirring paddle 11, and the bevel gear 25 at the output end of the second motor 12 is meshed with the second rotating shaft 10. There are four first support rods 16, and the ends of the first support rods 16 are respectively welded to the first rotating shaft 7 and the first feed plate 15. The first rotating shaft 7 drives the first feed plate 15 to rotate through the first support rods 16. There are also four second support rods 19, and the ends of the second support rods 19 are respectively fixedly connected to the second rotating shaft 10 and the second inner cylinder 17. The second inner cylinder 17 is fixedly connected to the second feed plate 18. The second rotating shaft 10 drives the first feed plate 15 and the second inner cylinder 17 to rotate through the second support rods 19.

[0054] like Figure 5As shown, the third inner cylinder 31 is located above the second inner cylinder 17 and is rotatably sealed with the second inner cylinder 17. The upper portion of the third inner cylinder 31 extends upward from the circular opening of the second cone plate 21. The upper portion of the third inner cylinder 31 is welded to an outer edge 33. A limiting rod 34 is vertically installed on the outer edge 33. The limiting rod 34 is a square structure. One end of the limiting rod 34 is welded to the outer edge 33. The other end of the limiting rod 34 passes through the tank body 1 and is slidably connected to the tank body 1. A fourth motor 36 and an adjusting screw 35 are installed on the top of the tank body 1. The adjusting screw 34 is One end of the adjusting screw 35 is connected to the output end of the fourth motor 36 through a coupling, and the other end of the adjusting screw 35 passes through the tank body 1 and the outer edge 33 in sequence. The upper part of the adjusting screw 35 is smooth and is rotatably and slidingly connected with the tank body 1. The lower part of the adjusting screw 35 is provided with a thread and is threadedly connected with the outer edge 33. The adjusting screw 35 rotates to pull the third inner cylinder 31 upward to separate the second inner cylinder 17 from the third inner cylinder 31, so that the material in the first feeding channel cannot continue to move upward and falls into the second inner cylinder 17 for circulation.

[0055] A retaining ring 23 is installed on the outer edge of the second cone plate 21, and the retaining ring 23 is welded to the second cone plate 21. The retaining ring 23 extends upward to abut the top surface of the tank body 1, so that the receiving bin 27 forms a closed chamber to prevent sand and gravel thrown out of the second feeding channel from splashing onto the second cone plate 21. An inner ring of the retaining ring 23 is installed with an inner gear ring 24, and a third motor 26 is installed on the tank body 1. A gear 25 meshing with the inner gear ring 24 is installed at the output end of the third motor 26, and the third motor 26 is used to drive the retaining ring 23 to rotate.

[0056] In order to increase the filtrate rate in the second feed channel, an exhaust pipe 30 is installed on the tank body 1 to evacuate the cavity between the first cone plate 20, the tank body 1 and the outer cylinder 5 to a negative pressure. The exhaust pipe 30 is used to connect to an external vacuum pump to achieve negative pressure.

[0057] Working principle: Use the valve to close the drain pipe 2, discharge the hydrochloric acid and wastewater into the tank body 1 through the first feed pipe 3, add the coupling agent into the tank body 1 through the second feed pipe 4, start the fourth motor 36, the fourth motor 36 drives the adjusting screw 35 to rotate, the adjusting screw 35 shaft will drive the third inner cylinder 31 to slide upward along the limit rod 34, so that the closed state between the second inner cylinder 17 and the third inner cylinder 31 is opened, and then start the first motor 9 and the second motor 12. The rotation of the first motor 9 drives the first stirring paddle 8 and the first feeding plate 15 to rotate. The first stirring paddle 8 pushes the wastewater upward, and the second The motor 12 rotates to drive the second stirring paddle 11, the second inner cylinder 17, and the second conveying plate 18 to rotate. The second stirring paddle 11 rotates to transport the wastewater downward, and the first stirring paddle 8 and the second stirring paddle 11 drive the mixed liquid to mix and hedge, thereby improving the mixing effect. At the same time, the mixed liquid produced by the hedge will enter the outside of the outer cylinder 5 through the first water filter hole 6. A part of the external liquid is sucked into the outer cylinder 5 again through the bottom of the tank body 1 by the first stirring paddle 8, and the other part of the external liquid is sucked into the first inner cylinder 13 by the second stirring paddle 11 through the reflux pipe 14, and is discharged through the first conveying plate 15 and the second conveying plate 18. During the upward transportation of the mixed liquid in the first feeding channel, since the second inner cylinder 17 is separated from the third inner cylinder 31, the mixed liquid leaks out from the separation position and flows back to the second inner cylinder 17 for circulation mixing. The circulation stirring and counteracting mixing improves the reaction efficiency of the mixed liquid; after the mixing and stirring reaction is completed, the fourth motor 36 is started to rotate in the reverse direction, driving the adjusting screw 35 to rotate and move the third inner cylinder 31 downward, realizing the sealing between the third inner cylinder 31 and the second inner cylinder 17, and the sealing between the sealing ring 32 and the second cone plate 21. Then the third motor 26 is started, and the third motor 26 rotates to drive The baffle ring 23 rotates, and the rotation of the baffle ring 23 drives the second cone plate 21 and the third feed plate 22 to rotate. The rotation of the third feed plate 22 pushes the sand and gravel to rotate outward and upward centrifugally, and the excess water flows out from the second water filter hole 29. The sand and gravel are thrown into the receiving bin 27 by the third feed plate 22 and finally discharged from the sand discharge port 28. In order to improve the efficiency of centrifugal separation of water, the exhaust pipe 30 is externally connected to a vacuum pump to draw negative pressure into the tank body, accelerate water separation, reduce the wastewater content of the sand and gravel, and realize the recycling of modified sand and gravel. The modified sand and gravel can be added to the real stone paint in a certain proportion, thereby realizing the effective utilization of waste.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A real stone paint wastewater treatment process, characterized in that, The following steps are included: S1. Discharge the real stone paint wastewater into the recovery device and use hydrochloric acid to adjust the pH value to acidic; S2. Add a coupling agent to the recycling device and stir the reaction to make the emulsion in the real stone paint adhere chemically to the sand and gravel; S3. The recycler recovers and separates the modified sand and gravel, and the treated acidic wastewater is passed into the sedimentation tank; S4. Sodium hydroxide is introduced into the sedimentation tank to adjust the pH value to a weak alkaline state, and a flocculant is added for flocculation and precipitation; S5. The supernatant after flocculation and precipitation is discharged into an oxidation tank and oxidized by ozone; S6. The small molecular organic matter after oxidation treatment is discharged into the biological treatment pool for treatment.

2. A real stone paint wastewater treatment process according to claim 1, characterized in that: The coupling agent is one or more of an aminosilane coupling agent or a vinylsilane coupling agent.

3. A real stone paint wastewater treatment device and process according to claim 1, characterized in that: In step S1, the pH value is adjusted to 3-6 using hydrochloric acid.

4. A real stone paint wastewater treatment process according to claim 1, characterized in that: In step S4, the pH value is adjusted to 7-8 using sodium hydroxide.

5. A real stone paint wastewater treatment device according to any one of claims 1-4, characterized in that: The recycler includes, A tank body (1), wherein a drain pipe (2) is provided at the bottom of the tank body (1), and a first feed pipe (3) and a second feed pipe (4) are provided in the middle of the tank body (1); An outer cylinder (5), the outer cylinder (5) is located in the tank body (1), a plurality of first water filtering holes (6) are provided on the outer cylinder (5), a first inner cylinder (13) and a second inner cylinder (17) are provided in the outer cylinder (5), the first inner cylinder (13) and the second inner cylinder (17) are located above the interior of the outer cylinder (5), the outer cylinder (5) and the first inner cylinder (13) and the second inner cylinder (17) form a first material conveying channel, a first material conveying plate (15), a second material conveying plate (18) and a return pipe (14) are provided in the first material conveying channel, The return pipe (14) passes through the outer cylinder (5) and the first inner cylinder (13) in sequence, and is located between the first conveying plate (15) and the second conveying plate (18). The first conveying plate (15) and the second conveying plate (18) are both spiral-shaped. The first conveying plate (15) extends from the lower part of the outer cylinder (5) to the upper part of the first inner cylinder (13). The first conveying plate (15) is closely attached to the inner wall of the outer cylinder (5) and rotates to convey materials upward. The second conveying plate (18) is fixedly connected to the second inner cylinder (17) and rotates to convey materials upward. a first stirring paddle (8) and a second stirring paddle (11), wherein the first stirring paddle (8) and the second stirring paddle (11) are located in the outer cylinder (5), and the fluid propulsion directions of the first stirring paddle and the second stirring paddle are arranged opposite to each other so that the wastewater flows out of the outer cylinder (5) through the first water filter hole (6); A first cone plate (20) and a second cone plate (21), both of which are inverted cone plate structures, form a second feed channel, the first feed channel is sealed and connected to the second feed channel, a third feed plate (22) is provided in the second feed channel, the third feed plate (22) is closely attached to the upper surface of the first cone plate (20), and is spirally distributed upward from the bottom of the first cone plate (20), the third feed plate (22) is rotatably arranged in the second feed channel, and a plurality of second water filter holes (29) are provided on the first cone plate (20); A material receiving bin (27) is located on the side wall of the tank body (1) and is used to receive sand and gravel discharged from the second material delivery channel.

6. A real stone paint wastewater treatment device according to claim 5, characterized in that: The invention also includes a first rotating shaft (7), a first motor (9), a second rotating shaft (10), and a second motor (12), wherein the first rotating shaft (7) is sleeved in the second rotating shaft (10), and the two are rotatably connected, the first rotating shaft (7) is fixedly connected to the first stirring paddle (8), the output end bevel gear of the first motor (9) is meshedly connected to the first rotating shaft (7), the second rotating shaft (10) is fixedly connected to the second stirring paddle (11), and the output end bevel gear of the second motor (12) is meshedly connected to the second rotating shaft (10).

7. A real stone paint wastewater treatment device according to claim 6, characterized in that: A first support rod (16) is provided on the first rotating shaft (7), and the ends of the first support rod (16) are respectively fixedly connected to the first rotating shaft (7) and the first conveying plate (15); a second support rod (19) is provided on the second rotating shaft (10), and the ends of the second support rod (19) are respectively fixedly connected to the second rotating shaft (10) and the second inner cylinder (17); and the second inner cylinder (17) is fixedly connected to the second conveying plate (18).

8. A real stone paint wastewater treatment device according to any one of claims 6 or 7, characterized in that: The third inner cylinder (31) is located above the second inner cylinder (17) and is rotatably sealed with the second inner cylinder (17). A sealing ring (32) is provided in the middle of the third inner cylinder (31) for sealing with the second cone plate (21). An outer edge (33) is provided on the upper part of the third inner cylinder (31). A limiting rod (34) is vertically provided on the outer edge (33). One end of the limiting rod (34) is fixedly connected to the outer edge (33). ), the other end of the limiting rod (34) passes through the tank body (1) and is slidably connected to the tank body (1), a fourth motor (36) and an adjusting screw (35) are provided on the top of the tank body (1), one end of the adjusting screw (35) is fixedly connected to the output end of the fourth motor (36), and the other end of the adjusting screw (35) passes through the tank body (1) and the outer edge (33) in sequence, and is rotatably connected to the tank body (1), and is threadedly connected to the outer edge (33).

9. The real stone paint wastewater treatment device according to claim 5, characterized in that: A retaining ring (23) is provided on the second cone plate (21), and the retaining ring (23) is fixedly connected to the second cone plate (21). An inner gear ring (24) is provided on the retaining ring (23). A third motor (26) is provided on the tank body (1), and an output end of the third motor (26) is provided with a gear (25) meshing with the inner gear ring (24). The third motor (26) is used to drive the retaining ring (23) to rotate.

10. The real stone paint wastewater treatment device according to claim 5, characterized in that: The tank body (1) is provided with an exhaust pipe (30) for exhausting the cavity between the first cone plate (20), the tank body (1) and the outer cylinder (5) into a negative pressure.

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