Recycling treatment device for silane-containing coupling agent production wastewater

Abstract

The utility model discloses a recycling treatment device for production wastewater containing a silane coupling agent, which comprises a water inlet pump, a pretreatment water tank, a medicine adding tank, a transfer pump, an ultramicro filter membrane component, a backwashing pump and a water production tank, and then pollutants adsorbed by the activated carbon are intercepted by the ultramicro filter membrane assembly, water containing the activated carbon in the ultramicro filter membrane assembly returns to the pretreatment water tank through the reflux inlet, and water without the activated carbon enters the water production tank and can be put into subsequent production activities. The influence on production activities and product quality is reduced; the ultramicro filter membrane assembly can intercept activated carbon and pollutants adsorbed by the activated carbon, and enables water containing the activated carbon to return to the pretreatment water tank again, so that the adsorption rate is greatly improved, and less resource waste is caused; and the backwashing pump can be used for backwashing without being disassembled for cleaning, so that the manual operation difficulty is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment and environmental protection technology, specifically a device for the reuse and treatment of wastewater from the production of silane coupling agents. Background Technology

[0002] Silane coupling agents are chemical additives that can bond organic and inorganic materials together. They are widely used in various industries, such as textiles and papermaking, fiberglass cloth manufacturing, new energy, glass industry, aerospace, and rubber and plastics industry. In related production activities, such as fiberglass cloth manufacturing, the water used in production processes may contain residual silane coupling agents, which constitute wastewater. Normally, this wastewater is treated and then reused in production, creating a continuous cycle.

[0003] The existing wastewater treatment process uses a precision filter + bag filter. However, due to the limited filtration precision, some fine fibers, starchy substances, and coupling agents that have not yet undergone coupling still remain. To address this, pretreatment can be performed to adsorb and aggregate various impurities in the wastewater, thus avoiding residues and ensuring that subsequent production activities and product quality are not affected. The accumulation of pollutants also facilitates overall filtration and cleaning. However, the process lacks a backwashing function, requiring manual disassembly and cleaning periodically. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing treatment processes lack a pretreatment stage for production wastewater, which easily leads to residues affecting production activities and product quality; at the same time, the lack of backwashing function makes manual cleaning difficult. To address these problems, this invention proposes a recycling treatment device for production wastewater containing silane coupling agents, comprising an inlet pump, a pretreatment water tank, a chemical addition tank, a transfer pump, an ultrafiltration membrane module, a backwash pump, and a product water tank. The transfer pump is connected to the chemical addition tank and the pretreatment water tank via pipelines. The inlet pump is connected to the pretreatment water tank and the lower part of the ultrafiltration membrane module via pipelines. The top of the ultrafiltration membrane module is connected to the product water tank via a pipeline. The upper part of the ultrafiltration membrane module is connected to the pretreatment water tank via a return pipe. The backwash pump is connected to the top of the ultrafiltration membrane module and the product water tank via pipelines.

[0005] The technical solution of this utility model involves setting up a pretreatment water tank and a drug addition tank. An activated carbon solution from the drug addition tank is introduced into the pretreatment water tank using a transfer pump. Through the adsorption effect of activated carbon, pollutants in the wastewater can be adsorbed, preventing impact on subsequent production activities. A reflux pipe allows the liquid containing activated carbon to circulate continuously, greatly improving adsorption efficiency, reducing production costs, and minimizing waste. Furthermore, by incorporating an ultrafiltration membrane module with a polytetrafluoroethylene hollow fiber membrane as the inner membrane, pollutants and activated carbon can be retained, ensuring the produced liquid is free of particulate impurities and can be used directly. This also facilitates cleaning. Combined with a backwash pump and air inlet, intermittent starting allows for the removal of pollutants, reducing manual operation difficulty and extending the service life of the ultrafiltration membrane module.

[0006] In a preferred embodiment of the present invention, the pretreatment tank is provided with an inlet for wastewater containing silane coupling agent, and the inlet is used to introduce production wastewater.

[0007] In a preferred embodiment of the present invention, the pretreatment water tank is equipped with a pretreatment mixer at the top, an ultrasonic level gauge is provided on the right side of the top of the pretreatment water tank, and a drain port is provided at the bottom of the pretreatment water tank. The pretreatment mixer ensures that the production wastewater fully contacts the activated carbon powder in the activated carbon solution, and the drain port is used to discharge all liquids during maintenance.

[0008] In a preferred embodiment of the present invention, the pretreatment water tank is a conical tank. The top left side of the pretreatment water tank is provided with a reflux port connected to the reflux pipe and a dosing port connected to the transfer pump. The pretreatment water tank is also provided with an outlet connected to the inlet pump. The activated carbon solution will not be completely saturated during the initial reaction, so some of the residual activated carbon solution returns to the pretreatment water tank through the reflux port and is continuously circulated, which can greatly improve the adsorption efficiency and reduce resource waste. The dosing port is used to introduce activated carbon solution from the drug addition tank, and the outlet is used to introduce the liquid in the pretreatment water tank into the ultrafiltration membrane module.

[0009] In a preferred embodiment of the present invention, the top of the drug addition tank is provided with a drug addition tank agitator, and the bottom of the drug addition tank is provided with a drain port. The drug addition tank agitator keeps the activated carbon solution uniform, and the drain port is used to drain all liquids during maintenance.

[0010] In a preferred embodiment of the present invention, the drug addition tank contains an activated carbon solution. The activated carbon powder in the activated carbon solution has a parameter of 200 mesh and an iodine value of 800. Activated carbon has strong adsorption properties and can adsorb fine fibers, starchy substances, and silane coupling agents in water, which can then accumulate to form pollutants.

[0011] In a preferred embodiment of the present invention, the ultrafiltration membrane module includes a membrane shell and an inner membrane. The inner membrane is disposed inside the membrane shell and is a polytetrafluoroethylene hollow fiber membrane. The inner diameter and outer diameter of the inner membrane filaments are 0.5 mm and 1 mm, respectively. The micropores on the surface of the membrane filaments can only allow clean liquid to pass through, and can be directly used in subsequent production activities.

[0012] In a preferred embodiment of the present invention, the ultrafiltration membrane module has an overflow outlet at its top, a cross-flow outlet at its upper part, an inlet at its lower part, and a drain outlet at its bottom. The overflow outlet is used to introduce water without activated carbon into the product water tank, the cross-flow outlet is used to allow water containing activated carbon to flow back into the pretreatment water tank, thereby increasing the contact time between the activated carbon powder and the production wastewater, improving the adsorption rate of the activated carbon powder, and reducing waste. The inlet is used to introduce liquid from the pretreatment water tank, and the drain outlet is used to discharge the liquid and pollutants adsorbed by the activated carbon during maintenance.

[0013] In a preferred embodiment of the present invention, the top and bottom of the ultrafiltration membrane module are respectively provided with an air inlet for easy cleaning. The two air inlets are used for air wiping and air washing, respectively, to avoid blockage and affect the normal operation of production activities.

[0014] In a preferred embodiment of the present invention, the top of the water production tank is provided with a production water outlet, and the bottom of the water production tank is provided with an vent. The production water outlet is used to discharge the treated water for continued use in production activities, and the vent facilitates the discharge of all liquids in the water production tank during maintenance.

[0015] The advantages of this utility model compared with the prior art are:

[0016] The technical solution of this utility model involves setting up a pretreatment water tank and a drug addition tank. An activated carbon solution from the drug addition tank is introduced into the pretreatment water tank using a transfer pump. Through the adsorption effect of activated carbon, pollutants in the wastewater can be adsorbed, preventing impact on subsequent production activities. A reflux pipe allows the liquid containing activated carbon to circulate continuously, greatly improving adsorption efficiency, reducing production costs, and minimizing waste. Furthermore, by incorporating an ultrafiltration membrane module with a polytetrafluoroethylene hollow fiber membrane as the inner membrane, pollutants and activated carbon can be retained, ensuring the produced liquid is free of particulate impurities and can be used directly. This also facilitates cleaning. Combined with a backwash pump and air inlet, intermittent starting allows for the removal of pollutants, reducing manual operation difficulty and extending the service life of the ultrafiltration membrane module. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the principle of this utility model;

[0018] Among them: 1-Inlet pump, 2-Pretreatment water tank, 3-Pretreatment mixer, 4-Drug addition tank, 5-Drug addition tank agitator, 6-Transfer pump, 7-Ultra-microfiltration membrane module, 8-Backwash pump, 9-Product water tank. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1 The technical solutions in the embodiments of this utility model will be described in detail below. Example 1

[0020] like Figure 1 As shown, this utility model is a wastewater recycling treatment device for silane coupling agent production wastewater, including an inlet pump 1, a pretreatment water tank 2, a drug addition tank 4, a transfer pump 6, an ultrafiltration membrane module 7, a backwash pump 8, and a product water tank 9. Each part is controlled by a PLC control cabinet, and the valve opening and closing and the pump start and stop are controlled by the data of each instrument to realize the automated treatment of production wastewater.

[0021] In this embodiment, the drug addition tank 4 contains an activated carbon solution, which is prepared by water and activated carbon powder. The activated carbon powder has a specific specification of 200 mesh and an iodine value of 800.

[0022] In this embodiment, a drug addition tank agitator 5 is installed on the top of the drug addition tank 4. The agitator 5 continuously stirs the activated carbon solution to maintain its uniformity. The bottom of the drug addition tank 4 is provided with a drain port. During maintenance and cleaning, all the liquid in the drug addition tank 4 can be drained through the drain port to facilitate subsequent maintenance and cleaning work.

[0023] In this embodiment, the inlet end of the transfer pump 6 is connected to the drug addition tank 4 through a pipeline, and the outlet end of the transfer pump 6 is connected to the pretreatment water tank 2 through a pipeline. The activated carbon solution can be drawn from the drug addition tank 4 and discharged into the pretreatment water tank 2 through the transfer pump 6. The activated carbon is used to pretreat the production wastewater in the pretreatment water tank 2, giving full play to the adsorption effect of the activated carbon and adsorbing related impurities and coupling agents and other pollutants.

[0024] In this embodiment, the pretreatment water tank 2 is a conical tank, which is the prior art. The pretreatment water tank 2 is provided with an inlet for introducing wastewater containing silane coupling agent. A dosing port is provided on the top left side of the pretreatment water tank 2 for connecting to the transfer pump 6. Activated carbon solution enters the pretreatment water tank 2 through the dosing port.

[0025] In this embodiment, a pretreatment mixer 3 is installed on the top of the pretreatment water tank 2. Through the action of the pretreatment mixer 3, the production wastewater and activated carbon solution can be fully mixed and contacted, thereby improving the adsorption efficiency and utilization rate of activated carbon powder and reducing waste.

[0026] In this embodiment, an ultrasonic level gauge is provided on the top right side of the pretreatment water tank 2, which is the prior art. It is used to monitor the liquid level in the pretreatment water tank 2 and keep the liquid level within a suitable range. The bottom of the pretreatment water tank 2 is provided with a drain port. During maintenance and cleaning, all the liquid in the pretreatment water tank 2 can be drained through the drain port to facilitate subsequent maintenance and cleaning work.

[0027] In this embodiment, a reflux port is provided on the top left side of the pretreatment water tank 2. The reflux port is connected to the cross-flow port at the top of the ultrafiltration membrane module 7 through a reflux pipe. The pretreatment water tank 2 is also provided with an outlet. The outlet is connected to the inlet end of the water inlet pump 1 through a pipe. The outlet end of the water inlet pump 1 is connected to the inlet at the bottom of the ultrafiltration membrane module 7. Under the action of the water inlet pump 1, the liquid in the pretreatment water tank 2 enters the ultrafiltration membrane module 7.

[0028] In this embodiment, in the pretreatment tank 2, the activated carbon powder in the production wastewater adsorbs the coupling agent and forms pollutants. When the production wastewater is pumped out by the inlet pump 1, some of the pollutants also flow out and enter the interior of the ultrafiltration membrane module 7. Then, the liquid level of the production wastewater in the ultrafiltration membrane module 7 gradually rises. The inner membrane of the ultrafiltration membrane module 7 can retain all the pollutants and activated carbon in the ultrafiltration membrane module 7, so that the liquid entering the production water tank 9 is a clean liquid that can be directly used for production activities.

[0029] In this embodiment, the ultrafiltration membrane module 7 includes a membrane shell and an inner membrane. The membrane shell is made of UPVC, and the inner membrane is installed inside the membrane shell. The inner membrane is made of polytetrafluoroethylene hollow fiber membrane, i.e., PTFE material, which is existing technology. The inner diameter and outer diameter of the inner membrane filaments are 0.5 mm and 1 mm, respectively. Each interface on the ultrafiltration membrane module 7 is located on the surface of the membrane shell.

[0030] Furthermore, due to the inherent properties of PTFE material, the inner membrane can maintain efficient and stable operation under harsh influent conditions such as strong acids, strong alkalis, strong oxidants, high suspended particles, and high turbidity. After long-term use, the inner membrane's efficiency can be restored through backwashing, air washing, chemical washing, and chemical soaking.

[0031] In this embodiment, the bottom end face of the inner membrane is open and the top end face is sealed. All the membrane fibers of the inner membrane are U-shaped bundled and suspended vertically, and the openings at both ends of the membrane fibers are facing upwards. Liquid without any particulate impurities passes through the micropores on the surface of the membrane fibers and then exits from both ends of the membrane fibers into the product water tank 9, which can be directly put into subsequent production activities.

[0032] In this embodiment, the activated carbon that does not participate in the reaction and the pollutants formed by the adsorption of activated carbon cannot enter the membrane fiber through the micropores, and therefore cannot enter the product water tank 9, ensuring that the liquid put into the production activities is clean and will not affect the product quality.

[0033] Furthermore, the liquid containing pollutants and activated carbon circulates between the pretreatment water tank 2 and the ultrafiltration membrane module 7 through the return pipe, which allows the activated carbon to fully exert its adsorption effect, greatly improves the utilization rate, and reduces production costs.

[0034] In this embodiment, the crossflow port at the top of the ultrafiltration membrane module 7 needs to be located below the upper end face of the inner membrane so that the liquid containing activated carbon and pollutants can be circulated.

[0035] In this embodiment, a regulating valve is provided on the return pipe. The amount of liquid in the return pipe can be adjusted by the regulating valve, so that more liquid without activated carbon powder and contaminants can enter the product water tank 9 through the overflow port at the top of the ultrafiltration membrane module 7 to meet the water consumption required for production activities.

[0036] In this embodiment, the overflow outlet is used to introduce the treated liquid into the product water tank 9 so that it can be directly put into subsequent production activities; the bottom of the ultrafiltration membrane module 7 is provided with a drain outlet, which is used to drain the liquid and related pollutants and impurities in the ultrafiltration membrane module 7.

[0037] In this embodiment, the top of the water production tank 9 is provided with a production water outlet, through which the treated water can be extracted for relevant production activities. The bottom of the water production tank 9 is provided with a drain port, through which all the liquid in the water production tank 9 can be discharged during maintenance and cleaning to facilitate subsequent maintenance and cleaning work.

[0038] The above describes the treatment process for production wastewater in this device. The treated liquid entering the product water tank 9 can be directly used in production activities.

[0039] In this embodiment, to reduce clogging of the ultrafiltration membrane module 7 and improve the efficiency of treating production wastewater, the device implements the backwashing function through the backwash pump 8. Specifically, the inlet end of the backwash pump 8 is connected to the product water tank 9 through a pipe, and the outlet end is connected to the top of the ultrafiltration membrane module 7 through a pipe. During backwashing, the liquid in the product water tank 9 is drawn out by the backwash pump 8, and then the inner membrane of the ultrafiltration membrane module 7 is rinsed to clean the contaminants attached to the surface of the inner membrane filaments and discharged from the drain outlet. The backwashing function is performed separately, and the device stops the treatment of production wastewater at this time.

[0040] In this embodiment, a three-way reversing valve is installed at the top overflow port of the ultrafiltration membrane module 7. The two outlets of the three-way reversing valve are connected to the product water tank 9 and the backwash pump 8 through pipes, respectively. Therefore, the backwashing and production wastewater treatment processes are carried out simultaneously.

[0041] Furthermore, the top and bottom of the ultrafiltration membrane module 7 are each equipped with an air inlet for air washing and wiping to enhance cleaning. Specifically, the external air source is controlled by the PLC control cabinet to introduce compressed gas to achieve the relevant purpose. It should be noted that each air inlet is equipped with a one-way valve to prevent liquid from flowing out.

[0042] In this embodiment, during air washing, compressed gas enters from the air inlet at the top of the ultrafiltration membrane module 7 and then exits from the drain outlet at its bottom, carrying away contaminants adhering to the surface of the inner membrane filaments from the inside out, accelerating the draining speed and improving the operating efficiency of the equipment. Air washing and backwashing can work together to greatly improve the cleaning efficiency.

[0043] In this embodiment, during air rubbing, compressed gas enters through the air inlet at the bottom of the ultrafiltration membrane module 7 and exits through the crossflow outlet at the top. This process is carried out during wastewater treatment. The compressed gas washes the surface of the inner membrane fibers in the water to avoid clogging and affecting the flow of liquid into the next treatment stage.

[0044] In this embodiment, the compressed gas generated by air friction is discharged through the cross-flow port and eventually enters the pretreatment water tank 2. An exhaust valve can be installed at the top of the pretreatment water tank 2 to discharge the gas and maintain normal air pressure.

[0045] In this embodiment, for the relevant production activities, the following steps can be used as an example: wastewater treatment - air wiping - wastewater treatment - air wiping - wastewater treatment - air washing - backwashing. This is one cycle, which is continuously repeated. It is only necessary to treat the wastewater to meet the water requirements of the production activities.

[0046] The method of using the wastewater recycling device for silane coupling agent production in this embodiment is as follows:

[0047] The PLC control cabinet controls the operation of the device. First, the production wastewater containing silane coupling agent enters the pretreatment water tank 2. Activated carbon solution is drawn from the drug addition tank 4 by the transfer pump 6 and added to the pretreatment water tank 2. The activated carbon powder adsorbs the coupling agent-related impurities in the wastewater, forming pollutants. Then, the inlet pump 1 draws the liquid from the pretreatment water tank 2 and enters the ultrafiltration membrane module 7. Through the retention of the inner membrane, the liquid without any particulate impurities enters the product water tank 9 through the pipe connected to the overflow port at the top of the ultrafiltration membrane module 7, ready for subsequent production activities. The liquid containing activated carbon powder circulates between the pretreatment water tank 2 and the ultrafiltration membrane module 7 through the return pipe, continuing to adsorb coupling agent and other impurities, greatly improving the utilization rate of activated carbon powder.

[0048] In the treatment of production wastewater, the air wiping operation is carried out at intervals. Compressed gas enters through the air inlet at the bottom of the ultrafiltration membrane module 7, exits through the cross-flow port at the top, and is finally discharged into the air through the exhaust valve at the top of the pretreatment water tank 2. The air wiping achieves the flushing of the inner membrane fiber surface and avoids clogging.

[0049] After the wastewater treatment process has been completed for a period of time, air washing and backwashing are required. During air washing, the drain port is opened, and compressed gas enters from the air inlet at the top of the ultrafiltration membrane module 7 and then exits from the drain port at the bottom, carrying away the pollutants attached to the surface of the inner membrane filaments and accelerating the discharge speed. During backwashing, the backwash pump 8 draws liquid from the product water tank 9 and enters the ultrafiltration membrane module 7 to rinse the inner membrane of the ultrafiltration membrane module 7 from the inside out, cleaning the pollutants attached to the surface of the inner membrane filaments. The combination of air washing and backwashing greatly improves the cleaning efficiency and cleaning effect.

[0050] The above embodiments are only for illustrating the technical concept of this utility model and should not be used to limit the protection scope of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the protection scope of this utility model.

Claims

1. A device for the reuse and treatment of wastewater from the production of silane coupling agents, characterized in that: It includes an inlet pump (1), a pretreatment water tank (2), a drug addition tank (4), a transfer pump (6), an ultrafiltration membrane module (7), a backwash pump (8), and a product water tank (9). The transfer pump (6) is connected to the drug addition tank (4) and the pretreatment water tank (2) through pipes. The inlet pump (1) is connected to the lower part of the pretreatment water tank (2) and the ultrafiltration membrane module (7) through pipes. The top of the ultrafiltration membrane module (7) is connected to the product water tank (9) through pipes. The upper part of the ultrafiltration membrane module (7) is connected to the pretreatment water tank (2) through a return pipe. The backwash pump (8) is connected to the top of the ultrafiltration membrane module (7) and the product water tank (9) through pipes.

2. The device for recycling wastewater from the production of silane coupling agents according to claim 1, characterized in that: The pretreatment tank (2) is equipped with an inlet for wastewater containing silane coupling agent.

3. The device for recycling wastewater from the production of silane coupling agents according to claim 1, characterized in that: The pretreatment water tank (2) is equipped with a pretreatment mixer (3) at the top, an ultrasonic level gauge is provided on the right side of the top of the pretreatment water tank (2), and an air vent is provided at the bottom of the pretreatment water tank (2).

4. The device for recycling wastewater from the production of silane coupling agents according to claim 1, characterized in that: The pretreatment water tank (2) is a conical tank. The top left side of the pretreatment water tank (2) is also provided with a return port connected to the return pipe and a dosing port connected to the transfer pump. The pretreatment water tank (2) is also provided with an outlet connected to the inlet pump (1).

5. The device for recycling wastewater from the production of silane coupling agents according to claim 1, characterized in that: The top of the drug addition tank (4) is equipped with a drug addition tank agitator (5), and the bottom of the drug addition tank (4) is equipped with an air vent.

6. The device for recycling and treating wastewater from the production of silane coupling agents according to claim 1, characterized in that: The drug addition tank (4) contains an activated carbon solution, and the activated carbon powder in the activated carbon solution has a parameter of 200 mesh and an iodine value of 800.

7. The device for recycling and treating wastewater from the production of silane coupling agents according to claim 1, characterized in that: The ultrafiltration membrane module (7) includes a membrane shell and an inner membrane. The inner membrane is disposed inside the membrane shell and is a polytetrafluoroethylene hollow fiber membrane. The inner diameter and outer diameter of the inner membrane filaments are 0.5 mm and 1 mm, respectively.

8. The device for recycling wastewater from the production of silane coupling agents according to claim 1, characterized in that: The ultrafiltration membrane module (7) is provided with an overflow port at the top, a cross-flow port at the upper part of the ultrafiltration membrane module (7), an inlet at the lower part of the ultrafiltration membrane module (7), and a drain port at the bottom of the ultrafiltration membrane module (7).

9. The device for recycling wastewater from the production of silane coupling agents according to claim 1, characterized in that: The top and bottom of the ultrafiltration membrane assembly (7) are each provided with an air inlet for easy cleaning.

10. A device for the reuse and treatment of wastewater from the production of silane coupling agents according to claim 1, characterized in that: The top of the water production tank (9) is provided with a production water outlet, and the bottom of the water production tank (9) is provided with an air vent.

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