Technical method for purifying and reutilizing jean silkete alkali waste liquid by membrane method
A process method and technology of waste lye, applied in chemical instruments and methods, mercerizing, textile material treatment, etc., can solve problems such as inability to process, achieve the effects of reducing usage, reducing the load of treatment facilities, and enhancing biochemical stability
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[0025] Example 1
[0026] according to figure 2 As shown, in the denim mercerizing process, the present invention collects the high-concentration lye from the dipping tank for soaking denim and the high-concentration waste lye from the spraying and suction pump tank during the denim mercerizing process, and mixes the collected waste lye for use Inorganic ceramic ultrafiltration membrane with a filtration accuracy of 0.05 microns is used for filtration to remove fibers, particulate impurities and most other insoluble substances such as colloids. Collect the filtered waste lye, and then the collected waste lye is filtered through a high-precision bag and pressurized by a high-pressure pump, and then enters a special alkali-resistant nanofiltration membrane for separation and purification to remove the dye, slurry, and other materials in the waste lye. Small molecular organics, other small molecular impurities, most of the bivalent and above inorganic salts. The above-mentioned pu...
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[0027] Example 2
[0028] according to image 3 As shown, the present invention collects waste lye in the rolling tank in the denim mercerizing process during the denim mercerizing process and mixes the waste lye with the high concentration of waste lye in the spraying and suction pump tank, and the collected waste lye is used in the plate Filter by frame filter to remove fibers, particulate impurities and most of the colloids and other insoluble substances, collect the filtered clear liquid, collect the filtered waste lye clear liquid, and then use the same follow-up treatment as in Example 1. Just the process.
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[0029] Example 3
[0030] according to Figure 4 As shown, the present invention collects waste lye in the rolling tank in the denim mercerizing process during the denim mercerizing process and mixes the waste lye with the high concentration of the spray-absorption alkali pump tank, and the collected waste lye is filtered The inorganic ceramic microfiltration membrane with an accuracy of 0.05 microns is filtered to remove fibers, particulate impurities and most of the colloids and other insoluble materials, collect the filtered clear liquid, and then pass the collected waste lye clear liquid to a special NaOH-resistant concentration 0-20%, cutting the organic roll nanofiltration separation membrane with molecular weight of 100-1000Da to separate and further purify waste lye, remove dyes, small molecular organics, other small molecular impurities, most of divalent and divalent lye in waste lye For inorganic salts above the valence, the purified lye is evaporated to reach the NaOH...
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