Casting method for membrane assembly

Abstract

The invention relates to a casting method for a membrane assembly, which is a process for casting and fixing two ends of a hollow fiber ultrafiltration membrane strand and membrane pipe end heads. An aluminum die with good heat radiation is adopted, the bottom of the aluminum die is provided with a glue feeding hole, two ends of the membrane assembly are respectively cast by steps in a vertical way, hard glue is respectively cast in two ends of the membrane assembly by two times, and soft glue is cast in third time; blowing cooling is carried out after first hard glue casting to ensure that the glue temperature is rapidly reduced, and the solidification temperature is controlled to avoid wire burning; and a vibrating step is added after each time of casting to ensure that bubbles in the glue are discharged in a vibrating manner. The casting method has low equipment investment cost, the same casting frame can be used for simultaneously casting 10 membrane assemblies, thus the production efficiency is high; meanwhile, the problems of high temperature wire burning due to heat release during the casting and difficulty in discharging the bubbles in the glue can be overcome, thus the high-quality membrane assembly can be obtained.

Description

Technical field: [0001] The invention relates to a casting method of a membrane module, which is one of the assembling links of the hollow fiber ultrafiltration membrane module, and relates to a process of casting and fixing the two ends of the hollow fiber ultrafiltration membrane tow and the end of the membrane tube. Background technique [0002] As a new type of membrane separation technology, ultrafiltration is mostly used in the process of liquid component separation, purification or concentration. It has a wide range of uses, ranging from household water purifiers to chemical units for separation, purification or concentration in modern industries. Or large-scale water purification equipment, all have different scale applications, and also have great potential for use in environmental protection. In the past 20 years, the hollow fiber ultrafiltration membrane has developed rapidly and has become one of the widely used varieties in the field of membrane separation. [...

AI Technical Summary

Problems solved by technology

[0005] (1) High equipment cost: 1 casting machine needs to invest 50,000 to 100,000 yuan, and it occupies a large area;

[0006] (2) Low production efficiency: one casting machine can only produce 1-4 membrane modules at a time, and the entire casting process takes a long time, more than 12 hours;

[0007] (3) Stretching force of the membrane filament: due to the fast rotation speed of the casting machine, the centrifugal force causes the membrane filament to be stretched to both ends, which is easy to damage the filter layer of the membrane filament, thereby affecting the efficiency of membrane separation and the separated products the quality of

[0009] (1) The glue feeding speed is fast, and the high temperature generated by the glue reaction will cause burning (the silk turns black);

[0010] (2) Bubbles are easy to exist in the glue, and glue needs to be repaired, which wastes labor and materials, and it will leak water, which will affect the quality of produced water;

[0011] (3) Uneven glue flow: the glue has high viscosity, poor fluidity, and there is leakage of soft glue, which will cause water leakage;

[0012] (4) Poor sealing: the adhesive between the glue and the membrane wire is not strong, and cracking occurs, which will cause water leakage;

[0013] (5) The soft rubber cannot flow to the roots of all the membrane filaments, and cannot protect the membrane filaments

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