A system for treating and recycling wastewater from the production of aqueous polysiloxane resins

Abstract

The utility model relates to wastewater and recycling treatment technical field especially, more particularly to a kind of waterborne polysiloxane resin production wastewater treatment recycling system, including membrane processing unit, microprocessing unit and circulating water pump, the output end of membrane processing unit and the input end of circulating water pump intercommunication, the output end of circulating water pump and the input end of microprocessing unit intercommunication;Membrane processing unit includes processing box, impurity filtration subassembly, activated carbon filter membrane group, biological filter membrane group, sediment tank and reflux water pump, by integrating multiple processing steps such as impurity filtration, activated carbon adsorption, biodegradation in a processing box, efficient multistage collaborative processing procedure is formed, each type of pollutant in wastewater is removed gradually, effluent water quality is excellent, can be directly recycled in production link, realizes the closed circuit circulation of water resources.

Description

Technical Field

[0001] This utility model relates to the field of wastewater and recycling technology, and in particular to a water-based polysiloxane resin production wastewater treatment and reuse system. Background Technology

[0002] Waterborne polysiloxane resin, as an environmentally friendly high-performance resin, generates a large amount of process wastewater during its production. This wastewater has a complex composition, typically containing unreacted organosilicon monomers, low-molecular-weight siloxanes, catalysts, emulsifiers, and minute inorganic impurities that may be introduced from the raw materials. These pollutants are characterized by high chemical stability and poor biodegradability; direct discharge would cause environmental pollution.

[0003] Currently, the treatment of this type of wastewater often employs a combination of methods, such as physical sedimentation, chemical coagulation, and biological treatment. However, these traditional methods have the following significant drawbacks: traditional gravity sedimentation has limited effectiveness in removing emulsified or dissolved organosilicon pollutants, and the treated effluent quality is difficult to meet the standards for reuse in production, resulting in water waste; if membrane treatment technology is used, colloidal, macromolecular organic matter, and oily substances in the wastewater can easily cause membrane pore blockage and surface fouling, leading to a rapid decline in membrane flux and requiring frequent chemical cleaning and replacement, which greatly increases the system's operation and maintenance costs. Summary of the Invention

[0004] The technical problem this utility model aims to solve is: to overcome the limited removal effect of gravity sedimentation on emulsified or dissolved organosilicon pollutants in existing technologies, resulting in effluent quality that is difficult to meet the standards for reuse in production, thus wasting water resources; and to address the problem that if membrane treatment technology is used, colloids, macromolecular organic matter, and oily substances in the wastewater can easily cause membrane pore blockage and surface fouling, leading to a rapid decline in membrane flux and requiring frequent chemical cleaning and replacement, which greatly increases the operating and maintenance costs of the system. Therefore, this utility model provides a water-based polysiloxane resin production wastewater treatment and reuse system.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a water-based polysiloxane resin production wastewater treatment and reuse system, including a membrane treatment unit, a microprocessor unit and a circulating water pump, wherein the output end of the membrane treatment unit is connected to the input end of the circulating water pump, and the output end of the circulating water pump is connected to the input end of the microprocessor unit. The membrane treatment unit includes a treatment tank, an impurity filtration assembly, an activated carbon filter membrane assembly, a biological filter membrane assembly, a sedimentation tank, and a return water pump. A first partition and a second partition are installed at intervals within the treatment tank. The first partition and the adjacent inner wall of the treatment tank enclose a first treatment zone. The first partition, the second partition, and the treatment tank enclose a second treatment zone. The second partition and the adjacent inner wall of the treatment tank enclose a third treatment zone. A first through-hole is provided on the first partition to connect the first and second treatment zones. A second through-hole is provided on the second partition to connect the second and third treatment zones. The impurity filtration assembly is installed in the first treatment zone, the activated carbon filter membrane assembly is arranged in the second treatment zone, and the biological filter membrane assembly is arranged in the third treatment zone. The impurity conveying mechanism of the impurity filtration assembly... The outlet is connected to the sedimentation tank, the inlet of the return water pump is connected to the sedimentation tank, and the outlet of the return water pump is connected to the inlet of the impurity filtration component. By integrating multiple treatment steps such as impurity filtration, activated carbon adsorption, and biodegradation into one treatment tank, a highly efficient multi-stage synergistic treatment process is formed. Various pollutants in the wastewater are removed step by step, resulting in excellent effluent quality that can be directly reused in the production process, realizing a closed-loop water resource cycle. Through the cooperation of the upper rotating seat, lower rotating seat, filter screen, inlet pipe, outlet pipe, and drive components, a dynamically rotating filter screen design is achieved, thereby avoiding membrane or filter screen clogging. Combined with centrifugal force for automatic sludge discharge, the risk of membrane fouling is reduced. The compact structure realizes three-stage synergistic purification treatment of coarse filtration, adsorption, and biodegradation, reducing the equipment footprint.

[0006] To address the problem of fixed filter screens being prone to clogging and difficult to clean, a further impurity filtration assembly is included, comprising an upper rotating seat, a lower rotating seat, a filter screen, an inlet pipe, an outlet pipe, and a drive component. The upper rotating seat is rotatably connected to the top surface inside the processing chamber, and the lower rotating seat is rotatably connected to the bottom surface inside the processing chamber. The filter screen connects the upper and lower rotating seats, and the upper and lower rotating seats and the filter screen together form an impurity filtration zone. The inlet pipe is rotatably connected to the upper rotating seat, and the output end of the inlet pipe extends into the impurity filtration zone. The input end of the outlet pipe extends into the impurity filtration zone, and the outlet pipe is rotatably connected to the lower rotating seat. The output end of the outlet pipe extends into the sedimentation tank. The output end of the drive component is drively connected to the lower rotating seat.

[0007] To address the issue of reduced filtration efficiency caused by short-circuiting of water flow in the rotating filtration zone, the impurity filtration assembly further includes a shielding component located within the impurity filtration zone, which is fixedly connected to the lower rotating seat.

[0008] To address the issue of turbulent flow causing floc settling within the settling tank, a further addition is the arrangement of several flow stabilizers within the settling tank, with the flow stabilizers distributed at transverse intervals along the settling tank.

[0009] To address the issue of insufficient adsorption contact by activated carbon membranes, the system further includes an activated carbon filter membrane assembly comprising several activated carbon filter membranes spaced laterally along the treatment chamber, with the activated carbon filter membranes vertically separating the second treatment zone.

[0010] To address the issue of insufficient hydraulic retention time in biofilms, the system further includes a biofiltration membrane module comprising several biofiltration membranes spaced vertically along the treatment tank, with the biofiltration membranes laterally separating the third treatment zone, and a second through-hole located below the biofiltration membrane module.

[0011] The beneficial effects of this utility model are: The waterborne polysiloxane resin production wastewater treatment and reuse system provided by this utility model integrates multiple treatment steps such as impurity filtration, activated carbon adsorption, and biodegradation into one treatment tank, forming an efficient multi-level synergistic treatment process, removing various pollutants in the wastewater step by step, and producing excellent effluent that can be directly reused in the production process, thus realizing a closed-loop cycle of water resources. By coordinating the upper rotating seat, lower rotating seat, filter screen, inlet pipe, outlet pipe, and drive components, a dynamically rotating filter screen design is achieved, thereby preventing membrane or filter screen clogging. Combined with centrifugal force for automatic slag discharge, the risk of membrane fouling is reduced. The compact structure enables three-stage synergistic purification treatment of coarse filtration, adsorption, and biodegradation, reducing the equipment footprint. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the membrane treatment unit of this utility model.

[0014] In the diagram: 1. Membrane treatment unit; 11. Treatment box; 111. First partition; 1111. First through hole; 112. Second partition; 1121. Second through hole; 113. First treatment zone; 114. Second treatment zone; 115. Third treatment zone; 12. Impurity filtration assembly; 121. Upper rotating seat; 122. Lower rotating seat; 123. Filter screen; 124. Inlet pipe; 125. Outlet pipe; 126. Drive component; 127. Shielding component; 13. Activated carbon filter membrane assembly; 14. Biofiltration membrane assembly; 15. Sedimentation tank; 151. Flow stabilizer; 16. Return water pump; 2. Microprocessor unit; 3. Circulating water pump. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] like Figure 1 This is a schematic diagram of the structure of the present invention. A water-based polysiloxane resin production wastewater treatment and reuse system includes a membrane treatment unit 1, a microprocessor unit 2, and a circulating water pump 3. The output end of the membrane treatment unit 1 is connected to the input end of the circulating water pump 3, and the output end of the circulating water pump 3 is connected to the input end of the microprocessor unit 2. Membrane treatment unit 1 includes a treatment tank 11, an impurity filtration assembly 12, an activated carbon filter membrane group 13, a biological filter membrane group 14, a sedimentation tank 15, and a return water pump 16. A first partition 111 and a second partition 112 are installed at intervals inside the treatment tank 11. The first partition 111 and the adjacent inner wall of the treatment tank 11 enclose a first treatment zone 113. The first partition 111, the second partition 112, and the treatment tank 11 enclose a second treatment zone 114. The second partition 112 and the adjacent inner wall of the treatment tank 11 enclose a third treatment zone 115. A first through hole 1111 is provided on the first partition 111 for connecting the first treatment zone 113 and the second treatment zone 114. A second through hole 1121 is provided on the second partition 112 for connecting the second treatment zone 114 and the third treatment zone 115. The impurity filtration assembly 12 is installed in the first... Within treatment zone 113, activated carbon filter membrane module 13 is arranged in the second treatment zone 114, and biological filter membrane module 14 is arranged in the third treatment zone 115. The impurity output end of impurity filter component 12 is connected to sedimentation tank 15, the input end of return water pump 16 is connected to sedimentation tank 15, and the output end of return water pump 16 is connected to the input end of impurity filter component 12. By integrating multiple treatment steps such as impurity filtration, activated carbon adsorption, and biodegradation into one treatment tank 11, a highly efficient multi-stage synergistic treatment process is formed, which removes various pollutants in wastewater step by step. The effluent water quality is excellent and can be directly reused in the production process, realizing a closed-loop water resource cycle. The compact structure of this application realizes three-stage synergistic purification treatment of coarse filtration, adsorption, and biodegradation, reducing equipment footprint, integrating three-stage treatment, and reducing fresh water consumption and extending membrane life through sedimentation tank 15 return.

[0017] like Figure 2As shown, the impurity filtration assembly 12 includes an upper rotating seat 121, a lower rotating seat 122, a filter screen 123, an inlet pipe 124, an outlet pipe 125, and a drive unit 126. The drive unit 126 is a motor. The upper rotating seat 121 is rotatably connected to the top surface inside the processing tank 11, and the lower rotating seat 122 is rotatably connected to the bottom surface inside the processing tank 11. The filter screen 123 connects the upper rotating seat 121 and the lower rotating seat 122. The upper rotating seat 121, the lower rotating seat 122, and the filter screen 123 enclose an impurity filtration zone. The inlet pipe 124 is rotatably connected to the upper rotating seat 121, and its output end extends into the impurity filtration zone. The input end of the outlet pipe 125 extends into the impurity filtration zone, and its output end extends into the sedimentation tank 15. The output end of the drive unit 126 is drively connected to the lower rotating seat 122. The combination of the rotating seat 122, filter screen 123, inlet pipe 124, outlet pipe 125, and drive component 126 enables the design of a dynamically rotating filter screen 123, thereby preventing membrane or filter screen blockage. Combined with centrifugal force for automatic slag discharge, the risk of membrane fouling is reduced. The rotating filter screen 123 dynamically separates impurities, and combined with centrifugal force for automatic slag discharge, the impurity filtration assembly 12 achieves dynamic filtration and automatic, continuous slag discharge. Compared with static filtration, this scheme utilizes centrifugal force to greatly reduce the adhesion of impurities on the surface of the filter screen 123, making it less prone to blockage, with high filtration efficiency. Moreover, impurity collection and discharge can be completed without stopping the machine, with a high degree of automation. The rotating structure provides a basis for the formation of a vortex at the center. Centrifugal force allows water to pass through the filter screen, and the central vortex formed by the interaction with the liquid injected by the return water pump 16 can enrich impurities at the center and smoothly discharge them from the outlet pipe 125, achieving efficient dynamic separation and automatic slag discharge.

[0018] like Figure 2 As shown, the impurity filtration assembly 12 includes a shielding member 127 located within the impurity filtration zone. The shielding member 127 is fixedly connected to the lower rotating seat 122. The shielding member 127 forces water flow through the filter screen 123, thereby increasing the rejection rate. The shielding member 127 can further disturb the flow field, assist in stabilizing and strengthening the central vortex effect, and ensure that impurities are more effectively confined in the central region and transported to the outlet of the outlet pipe 125, thereby improving the separation efficiency.

[0019] like Figure 2 As shown, several flow stabilizers 151 are arranged inside the sedimentation tank 15. The flow stabilizers 151 are distributed at intervals along the lateral side of the sedimentation tank 15. The flow stabilizers 151 laminate the water flow, accelerate flocculation and sedimentation, and can effectively reduce the flow velocity of the impurity-containing liquid entering the sedimentation tank 15, stabilize the water flow state, create good static settling conditions for impurity particles, ensure that the return water pump 16 draws the upper layer liquid with extremely low impurity content, and avoid disturbing the impurities in the lower layer of the sedimentation tank 15.

[0020] like Figure 2 As shown, the activated carbon filter membrane module 13 includes several activated carbon filter membranes that are spaced laterally along the treatment box 11. The activated carbon filter membranes vertically separate the second treatment zone 114, and the dense arrangement laterally increases the contact area between wastewater and membrane, thereby increasing the contact area and contact time between wastewater and activated carbon, ensuring the sufficiency and efficiency of the adsorption process, and also providing convenience for the installation and maintenance of the membrane module.

[0021] like Figure 2 As shown, the biofiltration membrane module 14 includes several biofiltration membranes that are vertically spaced along the treatment tank 11. The biofiltration membranes horizontally divide the third treatment zone 115. The second through hole 1121 is located below the biofiltration membrane module 14. The vertical arrangement adopts a diffuse design, which allows wastewater to pass through multiple layers of biofiltration membranes evenly, thereby improving the biodegradation efficiency. The horizontally arranged membrane module forms multiple layers of biological treatment. Wastewater flows from bottom to top and can pass through each layer of biofilm evenly, thereby improving the efficiency of biological treatment. The bottom-in, top-out method is conducive to carrying away any gas that may be generated during the treatment process, avoiding gas blockage, and ensuring that the biofilm is always in full contact with the wastewater.

[0022] Working process: Production wastewater enters the first treatment zone 113 of membrane treatment unit 1 through inlet pipe 124. The wastewater and the return liquid from return water pump 16 enter the interior of high-speed rotating impurity filter assembly 12. Return water pump 16 draws the upper liquid from the upper layer of sedimentation tank 15 and pumps it in at a specific angle and flow rate, forming a stable vortex in the central area of ​​rotating filter screen 123. The centripetal force and fluid dynamic effect generated by the vortex effectively restrict and enrich the impurities in the wastewater in the central area of ​​the vortex, while the water passes through the filter screen 123 and is discharged under the action of centrifugal force, realizing the rapid and efficient separation of impurities and water. High-concentration impurities confined in the central vortex region are continuously discharged into the sedimentation tank 15 through the outlet pipe 125. Inside the sedimentation tank 15, due to the action of multiple flow stabilizers 151, the liquid flow speed is slowed down and tends to be stable, so that most of the suspended impurities can be effectively settled and separated and enriched at the bottom of the sedimentation tank 15. The flow stabilizers 151 can also prevent the liquid inside the sedimentation tank 15 from being disturbed when the return water pump 16 is pumped. After primary filtration, the wastewater enters the second treatment zone 114 through the first through hole 1111 and flows through the activated carbon filter membrane module 13. The activated carbon, with its huge specific surface area and rich pore structure, efficiently adsorbs dissolved organic matter, residual emulsifiers and some odor substances in the wastewater. Subsequently, the wastewater enters the third treatment zone 115 through the second through-hole 1121 and flows through the biofiltration membrane group 14. Specific microorganisms attached to the biofilm decompose the residual biodegradable organic matter in the wastewater, converting it into harmless carbon dioxide and water, thus achieving deep purification. The purified water flowing out of the membrane treatment unit 1 is pumped into the micro-treatment unit 2 by the circulating water pump 3 for final fine treatment and disinfection, ensuring that the produced water meets the reuse standard.

[0023] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A system for treating and reusing wastewater from the production of waterborne polysiloxane resins, characterized in that, It includes a membrane treatment unit (1), a microprocessor unit (2) and a circulating water pump (3), wherein the output end of the membrane treatment unit (1) is connected to the input end of the circulating water pump (3), and the output end of the circulating water pump (3) is connected to the input end of the microprocessor unit (2); The membrane treatment unit (1) includes a treatment tank (11), an impurity filtration assembly (12), an activated carbon filtration membrane assembly (13), a biological filtration membrane assembly (14), a sedimentation tank (15), and a return water pump (16). A first partition (111) and a second partition (112) are installed at intervals inside the treatment tank (11). The first partition (111) and the inner wall of the adjacent treatment tank (11) enclose a first treatment area (113). The first partition (111), the second partition (112), and the treatment tank (11) enclose a second treatment area (114). The second partition (112) and the inner wall of the adjacent treatment tank (11) enclose a third treatment area (115). The first partition (111) has a connection for communicating with the second treatment area. The first through hole (1111) of the first treatment zone (113) and the second treatment zone (114) is provided, and the second partition (112) is provided with a second through hole (1121) for connecting the second treatment zone (114) and the third treatment zone (115). The impurity filter assembly (12) is installed in the first treatment zone (113), the activated carbon filter membrane assembly (13) is arranged in the second treatment zone (114), and the biological filter membrane assembly (14) is arranged in the third treatment zone (115). The impurity output end of the impurity filter assembly (12) is connected to the sedimentation tank (15), the input end of the return water pump (16) is connected to the sedimentation tank (15), and the output end of the return water pump (16) is connected to the input end of the impurity filter assembly (12).

2. The waterborne polysiloxane resin production wastewater treatment and reuse system as described in claim 1, characterized in that: The impurity filtration assembly (12) includes an upper rotating seat (121), a lower rotating seat (122), a filter screen (123), an inlet pipe (124), an outlet pipe (125), and a drive unit (126). The upper rotating seat (121) is rotatably connected to the top surface of the processing tank (11), and the lower rotating seat (122) is rotatably connected to the bottom surface of the processing tank (11). The filter screen (123) connects the upper rotating seat (121) and the lower rotating seat (122). The upper rotating seat (121) and the lower rotating seat (122) are connected to each other. 22) and the filter screen (123) enclose to form an impurity filtration zone. The inlet pipe (124) and the upper rotating seat (121) are rotatably connected. The output end of the inlet pipe (124) extends into the impurity filtration zone. The input end of the outlet pipe (125) extends into the impurity filtration zone. The outlet pipe (125) and the lower rotating seat (122) are rotatably connected. The output end of the outlet pipe (125) extends into the sedimentation tank (15). The output end of the drive unit (126) and the lower rotating seat (122) are drively connected.

3. The waterborne polysiloxane resin production wastewater treatment and reuse system as described in claim 2, characterized in that: The impurity filtration assembly (12) includes a shield (127) located within the impurity filtration zone, and the shield (127) is fixedly connected to the lower rotating seat (122).

4. The waterborne polysiloxane resin production wastewater treatment and reuse system as described in claim 1, characterized in that: The sedimentation tank (15) is provided with several flow stabilizers (151), which are distributed at intervals along the lateral side of the sedimentation tank (15).

5. The waterborne polysiloxane resin production wastewater treatment and reuse system as described in claim 1, characterized in that: The activated carbon filter membrane assembly (13) includes several activated carbon filter membranes that are laterally spaced along the treatment box (11), and the activated carbon filter membranes vertically separate the second treatment zone (114).

6. The waterborne polysiloxane resin production wastewater treatment and reuse system as described in claim 1, characterized in that: The biofiltration membrane group (14) includes several biofiltration membranes that are vertically spaced along the treatment box (11). The biofiltration membranes horizontally divide the third treatment area (115), and the second through hole (1121) is located below the biofiltration membrane group (14).

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