Externally pressed six-wing tubular membrane and method for manufacturing same

Abstract

The invention discloses an externally pressed six-wing tubular membrane and a method for manufacturing the membrane. The externally pressed six-wing tubular membrane comprises a six-wing tubular membrane body, a six-wing lined pipe, a composite filter membrane, a depression bar, a core tube, an electrode lead, an external layer carbon net, an organic filter membrane, an internal layer carbon net, and a prefabricated membrane tube. The composite filter membrane is composed of the internal layer carbon net, the organic filter membrane, the external layer carbon net and the electrode lead. The six-wing membrane is composed of the six-wing lined pipe, the composite filter membrane, the depression bar, the core tube and an end cover; flow guide circular holes are arranged between adjacent wing boards outside the core tube; the composite filter membrane is fixed between two adjacent wing boards by the depression bar and distributed on the outer surface of the six-wing lined pipe in a rising and falling way; both ends of the six-wing tubular membrane are sealed and fixed by the end cover and an epoxy resin; the electrode lead is led out from the sealed position of the epoxy resin. According to the externally pressed six-wing tubular membrane, the high-efficiency filtration, and pollution-preventing and self-cleaning functions are realized, and the manufacturing process is simple, thus the externally pressed six-wing tubular membrane is applied to the large polluted water or waste water treatment engineering.

Description

technical field [0001] The invention relates to the technical field of sewage and waste water treatment, in particular to a membrane bioreactor separation and filtration membrane manufacturing technology, in particular to an external pressure hexagonal tubular membrane and a preparation method thereof. Background technique [0002] Membrane bioreactors have played an important role in sewage and wastewater treatment projects and environmental protection projects; along with the practical application of membrane bioreactor projects, especially the implementation of large-scale sewage and wastewater treatment projects, many Problems and deficiencies; these defects focus on three technical aspects: organic biofilm manufacturing technology; organic biofilm application technology; organic biofilm functional technology. [0003] The existing organic biofilm manufacturing technology is concentrated on membrane preparation materials and modified materials. Most of the organic membra...

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Problems solved by technology

[0003] The existing organic biofilm manufacturing technology is concentrated on membrane preparation materials and modified materials. Most of the organic membrane materials are organic polymers, mainly fluorine-containing polymers represented by polyvinylidene fluoride, and modified fibers. , polysulfone, polyolefin, acrylic acid copolymer, polyamide, polycarbonate, etc.; due to the organic filtration membranes such as microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, and reverse osmosis membranes prepared by these organic polymers, in the application Or there are defects in function, such as hydrophilicity, etc., so people began to modify the organic polymer membrane material, one is to modify the membrane polymer by means of grafting, copolymerization, blending, etc. Second, after the film is formed, the surface of the film is modified by plasma, high-energy irradiation, surface chemical reaction, surface coating, surfactant and other technologies; in this technical field, most researches are Focusing on improving the separation ability and separation efficiency of organic membranes, the disadvantage is that there is no technology to significantly increase the biochemical reaction mechanism of microorganisms

Inorganic nanomaterials mainly used in organic membranes include: zero-dimensional materials titanium dioxide, silicon dioxide, zirconium dioxide, aluminum oxide, ferroferric oxide, fluorspar; one-dimensional materials carbon nanotubes, titanium nanotubes, titanium Nanowires; two-dimensional materials such as montmorillonite, rectorite, graphite, etc.; the main characteristics of nanomaterial polymer composite membranes are: (1) nanomaterials can effectively improve the cross-sectional pore structure of polymer membranes, and effectively improve the water permeability of composite membranes performance and separation efficiency; (2) Nanomaterials can effectively improve the surface potential, physical and chemical properties, and microscopic morphology of polymer membranes, reduce the interface behavior between pollutants in water and the membrane surface, and reduce membrane fouling; (3) Nanomaterials can effectively improve The mechanical behavior of the polymer film enhances the compressive properties of the composite film, thereby prolonging the operating cycle in engineering applications; the disadvantage is: because the nanomaterials are easy to agglomerate, the nanomaterials prepared by the existing method are doped with the nanomaterials in the polymer film Uneven dispersion causes the organic composite film to fall off easily, which affects the performance of the film

The patent CN102600730A with a relatively large degree of correlation, the preparation method of the external pressure tubular membrane discloses the method of preparing the external pressure tubular membrane by winding and bonding the strip flat film; the patent CN102600731A, the preparation method of the synchronous external pressure tubular membrane discloses the use of A method for preparing external pressure tubular membranes from flat flat membranes and non-woven fabrics; although the preparation method is very simple, the disadvantages are that the spatial efficiency of organic filtration membranes, the microscopic biochemical reactions of organic filtration membranes themselves, and the organic filtration efficiency have not been considered. Anti-fouling and self-cleaning functions of the membrane

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