System for manufacturing hollow fiber ultrafiltration membrane

Abstract

The utility model discloses a system for manufacturing a hollow fiber ultrafiltration membrane. The system comprises a membrane casting solution preparation assembly, a spinning nozzle, a gel tank, a rinsing tank and a silk winding nylon tank, wherein fixed pulleys are arranged in the gel tank and the water washing tank, and a godet wheel is arranged in the silk winding nylon tank; one end of the braided tube is wound on the roll shaft, and the other end of the braided tube passes through the spinning nozzle, then sequentially bypasses the fixed pulleys in the gel tank and the washing tank, and finally is fixed on the godet wheel in the winding nylon tank; the output end of the membrane casting solution preparation assembly is communicated with the spinning nozzle; the spinning nozzle sprays the membrane casting solution on the braided tube, the braided tube sprayed with the membrane casting solution sequentially penetrates through the gel tank and the rinsing tank under the rotation of the godet wheel, and finally, the silk is wound on the godet wheel in the silk winding nylon tank. The system disclosed by the utility model can be used for manufacturing the hollow fiber ultrafiltration membrane with the lining, which has high tensile strength and is not easy to bend and break in the aeration process.

Description

Technical Field

[0001] The utility model belongs to the technical field of hollow fiber ultrafiltration membrane production, in particular to a system for manufacturing hollow fiber ultrafiltration membranes. Background Art

[0002] Common sewage treatment methods include activated sludge method, mixed biological method, activated carbon adsorption method, chemical precipitation method, etc. These traditional treatment methods are both time-consuming and laborious. The use of membrane water treatment or its combination with membrane water treatment can both improve treatment efficiency and reduce costs; therefore, the quality of hollow fiber ultrafiltration membrane is the key point of membrane water treatment. In the prior art, when manufacturing hollow fiber ultrafiltration membrane, because the hollow fiber ultrafiltration membrane does not have an inner lining support, it is easy to break and bend during aeration, and the tensile strength is low. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a system for manufacturing hollow fiber ultrafiltration membranes, wherein the prepared hollow fiber ultrafiltration membranes are supported by inner liners and have the advantage of high tensile strength.

[0004] Technical solution: The system for manufacturing hollow fiber ultrafiltration membrane described in the utility model includes a casting liquid configuration component, a spinneret, a gel tank, a water washing tank and a winding filament tank; wherein, fixed pulleys are provided in the gel tank and the water washing tank, and a guide wire wheel is provided in the winding filament tank; it also includes a braided tube, one end of which is wound around a roller, and the other end of the braided tube passes through the spinneret and then successively bypasses the fixed pulleys in the gel tank and the water washing tank, and is finally fixed on the guide wire wheel in the winding filament tank; the output end of the casting liquid configuration component is connected to the spinneret; the spinneret sprays the casting liquid on the braided tube, and when the guide wire wheel rotates, the braided tube sprayed with the casting liquid passes through the gel tank and the water washing tank successively, and is finally wound on the guide wire wheel in the winding filament tank.

[0005] The casting liquid configuration component includes a stirring kettle for stirring raw materials, the output end of the stirring kettle is connected to a degassing kettle for removing bubbles, and the output end of the degassing kettle is connected to a spinneret through a first metering pump.

[0006] Among them, a first nitrogen valve interface is provided on the top of the stirring kettle, and a first filter and a first valve are sequentially provided on the connecting pipe between the stirring kettle and the degassing kettle; a second nitrogen valve interface and a suction port are provided on the top of the degassing kettle, and a second valve and a second filter are sequentially provided on the connecting pipe between the degassing kettle and the first metering pump.

[0007] Among them, one end of the braided tube passing through the spinneret passes through the first pulley and the second pulley to pass through the gel tank, and then passes through the third pulley, the fourth pulley and the fifth pulley to pass through the washing tank, and finally connected to the guide wheel in the winding groove.

[0008] The invention also includes a cleaning tank for cleaning the spinneret, the cleaning tank is connected with the spinneret through a second metering pump, and a third valve is arranged between the cleaning tank and the second metering pump.

[0009] Wherein, a third valve is provided between the cleaning tank and the second metering pump.

[0010] Beneficial effects: Compared with the prior art, the utility model has the following advantages: the utility model system can produce lined hollow fiber ultrafiltration membranes with high tensile strength and not easy to bend or break during aeration; the entire system includes equipment for stirring, degassing, weaving, washing and drying, which speeds up the manufacturing efficiency of hollow fiber ultrafiltration membranes and reduces unnecessary energy consumption in the entire manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a system schematic diagram of the utility model system. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, the system for manufacturing hollow fiber ultrafiltration membrane of the utility model comprises a casting liquid configuration component, a spinneret 15, a gel tank 21, a water washing tank 22 and a winding filament tank 23; the output end of the casting liquid configuration component is connected to the spinneret 15 to output the casting liquid, the spinneret 15 is penetrated with a braided tube 14 as an inner lining, the braided tube 14 passes through the spinneret 15 and the surface of the back surface is sprayed with casting liquid by the spinneret 15, the end of the braided tube 14 is connected to the guide wire wheel 27 in the winding filament tank 23, and the guide wire wheel 27 is driven by the motor to rotate and drive the braided tube 14 to participate in the production process. The braided tube 14 covered with the casting liquid is guided by the first pulley 16 and the second pulley 17 to enter the gel tank 21 for condensation. The braided tube 14 after the surface casting liquid condenses is further guided by the third pulley 18 and the fourth pulley 19 to enter the water washing tank 22 for cleaning. After cleaning, the braided tube 14 is further guided by the fifth pulley 20 to enter the winding groove 23 and be wound on the guide wheel 27. The casting liquid configuration component includes a stirring tank 1 for stirring raw materials, the output end of the stirring tank 1 is connected to the degassing tank 6 for removing bubbles, and the output end of the degassing tank 6 is connected to the spinneret 15 through the first metering pump 10. A first nitrogen valve interface 2 is provided on the top of the stirring kettle 1, and a first filter 3 and a first valve 4 are sequentially provided on the connecting pipe between the stirring kettle 1 and the degassing kettle 6; a second nitrogen valve interface 5 and a suction port 7 are provided on the top of the degassing kettle 6, and a second valve 8 and a second filter 9 are sequentially provided on the connecting pipe between the degassing kettle 6 and the first metering pump 10.

[0013] The system of the utility model also includes a water soaking tank 24 for replacing the solvent and additives in the hollow fiber ultrafiltration membrane, a glycerin soaking tank 25 for moisturizing, mildew prevention and supporting the pore size, and a drying rack 26 for drying the hollow fiber ultrafiltration membrane. The system of the utility model also includes a cleaning tank 11 for cleaning the spinneret 15, the cleaning tank 11 is connected to the spinneret 15 through the second metering pump 13, and a third valve 12 is provided between the cleaning tank 11 and the second metering pump 13.

[0014] In this embodiment, the casting liquid is composed of an organic solvent, a non-solvent and a polymer. The organic solvent is dimethylacetamide, N-methylpyrrolidone or dimethylformamide. The non-solvent is an inorganic salt (lithium chloride, calcium chloride, lithium nitrate, etc.), a small molecule additive (methanol, ethylene glycol, acetone, etc.) and a polymer additive (polyethylene glycol, polyvinyl pyrrolidone); the polymer is polyether sulfone, polysulfone, polyacrylonitrile or polyvinylidene fluoride; wherein the polymer percentage content is 16% to 22%, the organic solvent percentage content is 50% to 56%, and the non-solvent percentage content is 22% to 34%. The casting liquid is added to the stirring tank 1 and mixed and stirred at a constant temperature of 70°C for 24 to 48 hours. The braided tube 14 is made of polyamide fiber or polyester fiber, or a mixture of the two; the gel tank 21 contains an ethanol solution.

[0015] Working process: pour the casting liquid into the stirring tank 1 for stirring, use nitrogen to introduce the casting liquid from the stirring tank 1 into the degassing tank 6, the degassing tank 6 performs vacuum operation on the casting liquid, the degassing time is 6-8h, after degassing, check whether there are bubbles on the surface through the inspection mirror, and it can be used only when there are no bubbles; connect the braided tube 14 in series, one end of the braided tube 14 is wound around the roller, and the other end passes through the spinneret 15 and then bypasses the fixed pulleys in the gel tank 21 and the washing tank 22 in turn, and finally fixed on the guide wheel 27 in the winding silk groove 23; the casting liquid and the braided tube 14 converge in the spinneret 15; the guide wheel 27 operates and stretches the fiber braided tube 14, after a period of air bath, the casting liquid will be coated on the surface of the braided tube 14 to form membrane filaments, the membrane filaments enter the gel tank 21 and change from liquid phase to solid phase, then pass through the washing tank 22 for washing, and finally enter the guide wheel 27 of the winding silk groove 23 for winding. After the manufacturing process is completed, the nozzle 15 is connected to the cleaning liquid output pipe on the cleaning tank 11. The cleaning solvent of the cleaning tank 11 can be dimethylacetamide, N-methylpyrrolidone, etc. The control motor of the cleaning tank is turned on to clean the nozzle 15; the prepared membrane filaments are placed in the tap water soaking tank 24 and soaked for 24 to 48 hours to replace the solvent and non-solvent in the membrane filament pores; the membrane filaments soaked in tap water are placed in a glycerol soaking tank 25 with a concentration of about 20% to 55% and soaked for about 24 hours, which can not only achieve the purpose of moisturizing and mildew prevention but also achieve the effect of expanding the supporting pore size, and finally dried on the drying rack 26.

Claims

1. A system for manufacturing a hollow fiber ultrafiltration membrane, characterized in that: The invention comprises a casting liquid configuration component, a spinneret (15), a gel tank (21), a water washing tank (22) and a winding filament tank (23); wherein fixed pulleys are provided in the gel tank (21) and the water washing tank (22), and a guide wheel (27) is provided in the winding filament tank (23); and further comprises a braided tube (14), wherein one end of the braided tube (14) is wound around a roller shaft, and the other end of the braided tube (14) passes through the spinneret (15) and then passes through the gel tank (21) and the water washing tank (22) in sequence. The fixed pulley is finally fixed on the guide wheel (27) in the winding groove (23); the output end of the casting liquid configuration component is connected to the spinneret (15); the spinneret (15) sprays the casting liquid on the braided tube (14), and under the rotation of the guide wheel (27), the braided tube (14) sprayed with the casting liquid passes through the gel tank (21) and the washing tank (22) in sequence, and finally is wound on the guide wheel (27) in the winding groove (23).

2. A system for manufacturing hollow fiber ultrafiltration membrane according to claim 1, characterized in that: The casting liquid configuration component comprises a stirring kettle (1) for stirring raw materials, the output end of the stirring kettle (1) is connected to a degassing kettle (6) for removing bubbles, and the output end of the degassing kettle (6) is connected to a spinneret (15) via a first metering pump (10).

3. A system for manufacturing hollow fiber ultrafiltration membrane according to claim 2, characterized in that: A first nitrogen valve interface (2) is provided on the top of the stirring kettle (1), and a first filter (3) and a first valve (4) are provided in sequence on the connecting pipe between the stirring kettle (1) and the degassing kettle (6); a second nitrogen valve interface (5) and a gas extraction port (7) are provided on the top of the degassing kettle (6), and a second valve (8) and a second filter (9) are provided in sequence on the connecting pipe between the degassing kettle (6) and the first metering pump (10).

4. A system for manufacturing hollow fiber ultrafiltration membrane according to claim 1, characterized in that: One end of the braided tube (14) passing through the spinneret (15) passes through the first pulley (16) and the second pulley (17) to pass through the gel tank (21), and then passes through the third pulley (18), the fourth pulley (19) and the fifth pulley (20) to pass through the washing tank (22), and finally connects to the guide wheel (27) in the winding filament tank (23).

5. A system for manufacturing hollow fiber ultrafiltration membrane according to claim 1, characterized in that: It also comprises a cleaning tank (11) for cleaning the spinneret (15), and the cleaning tank (11) is connected to the spinneret (15) via a second metering pump (13).

6. A system for manufacturing hollow fiber ultrafiltration membrane according to claim 5, characterized in that: A third valve (12) is provided between the cleaning tank (11) and the second metering pump (13).

Images