Production method of intestinal wall type heliciform hollow fiber filtering membrane
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A technology of fiber filtration membrane and production method, which is applied in the direction of chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., and can solve the problems that affect the sustainable development of the dye industry, the ratio of BOD to COD is small, and the quality level of product varieties is not high. , to achieve the effects of highlighting weather aging resistance, facilitating backwashing and improving service life
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Problems solved by technology
Due to the small ratio of BOD to COD of this type of wastewater and poor biodegradability, there is currently no effective way to treat this type of wastewater except for the combustion method.
High-concentration chemical wastewater causes serious pollution to the environment and affects the sustainable development of the dye industry. Therefore, the development of an effective dye wastewater treat
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Embodiment Construction
[0012] Production steps:
[0013] 1. Production of flat composite filter membranes:
[0014] 1. Completely dissolve the hydrophilic inorganic ceramic powder and polysulfone in the solvent, and filter to obtain the filtrate, which is the casting solution;
[0015] 2. Pouring or spraying the casting solution on the filter membrane substrate, heating to volatilize the solvent, and forming a porous transitional film;
[0016] 3. Rinse the porous transitional membrane with clean water, dehydrate and dry to obtain a flat composite filter membrane.
[0017] 2. Production of intestinal wall type spiral hollow fiber filter membrane:
[0018] 1. After the flat composite filter membrane is overlapped with a layer of supporting material, it is transported to the pressing device composed of a heating composite roller and a cooling composite roller through the feeding and winding transmission device, and the flat composite filter membrane is combined with the heating The composite roller...
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Abstract
A production method of an intestinal wall type heliciform hollow fiber filtering membrane relates to the technical field of the filtering membrane production in the filtering technology. At first, a flat composite filtering membrane is produced, then the flat composite filtering membrane and propping materials are folded, wrinkled and scrolled together, and are spirally produced into the intestinal wall type heliciform hollow fiber filtering membrane. The product has higher heat resistance, noninflammability, prominent weather aging resistance, ozone resistance, irradiation resistance, ultraviolet light resistance and excellent corrosion resistance, and is not corroded by acid, alkali, strong oxidizer and halogen at room temperature.
Description
technical field [0001] The invention relates to technical fields such as petrochemical industry, electric power, mining, metallurgy, electronics, electroplating, textile, papermaking, pharmacy, wine making, food and beverage, municipal water supply, environmental protection, sewage reuse and seawater desalination, especially the filtration technology in filtration technology. Membrane production technology field. Background technique [0002] In the industrial production process, since the crude product produced by the traditional process needs to undergo post-treatment processes such as salting out, filtration, dilution, and drying, it can be made into a finished product. Therefore, a large amount of high-color, high-COD wastewater will be produced during the entire production process. Because the ratio of BOD to COD of this kind of wastewater is small and the biodegradability is poor, so far, except for the combustion method, no effective way has been found to treat this k...
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