Homogenic inorganic membrane tube and preparation method thereof

Abstract

The invention relates to a preparation method of a homogenic inorganic membrane tube, belongs to the technical field of inorganic membranes and relates to a preparation method of inorganic membrane tubes and membrane tubes thereof. The method comprises the following steps of: 1) screening homogenic base materials with uniform or same particles in size; 2) uniformly mixing base materials with water and water glass to form an inorganic membrane tube raw material; 3) filling the inorganic membrane tube raw material to a centrifugal casting inorganic membrane tube machine and manufacturing a membrane forming tube by centrifugal force; and 4) demoulding, sintering and cooling to form. The homogenic inorganic membrane tube provided by the invention is simple to manufacture and free from drying and demoulding, so that the production efficiency is greatly improved and the production cost is lowered. The inorganic membrane tube products prepared by the invention are consistent in filter layers, and the filter precision of the tube products washed and damaged is still maintained consistent.

Description

technical field [0001] The invention belongs to the technical field of inorganic membranes, and relates to an inorganic membrane tube and a manufacturing method thereof. Background technique [0002] Inorganic membranes are more and more widely used in many fields such as chemical industry, food, medicine, machinery, atomic energy, biology, etc. It has the advantages of stable performance, not easy to corrode, high temperature resistance, easy cleaning, etc. Fluid separation, clarification, sterilization and other functions. [0003] At present, the manufacture of inorganic membrane tubes includes: as the invention patent No. 00117221.2 published by the State Patent Office, "gradient ceramic tube and its preparation method", the diameter of the powder particles in the centrifugally formed slurry of the ceramic membrane tube prepared by this method From large to small, it gradually forms. The largest particles in the slurry form the outer layer of the membrane tube, and the ...

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Problems solved by technology

[0003] At present, the manufacture of inorganic membrane tubes includes: as the invention patent No. 00117221.2 published by the State Patent Office, "Gradient Ceramic Tube and Its Preparation Method", the diameter of the powder particles in the centrifugally formed slurry of ceramic membrane tubes prepared by this method is as follows: From large to small, it gradually forms. The largest particles in the slurry form the outer layer of the membrane tube, and the smallest particles are on the inner surface of the membrane tube. When the fluid enters the tube from the outside of the tube, the diameter of the outer tube wall is relatively small. Large, it is easy for the pollutants in the fluid to enter the pores, causing the membrane tube to be blocked and difficult to clean; another example is the "Double Control Membrane Inorganic Membrane Tube and Its Preparation Method" published by the State Patent Office. There is a layer of control film layer on the inner and outer walls of the membrane tube, but the control film layer is susceptible to abrasion and affects its separation effect

And the membrane tubes of the two technologies both have: 1. Due to the different sizes of the base material particles, it is easy to burst during firing; 2. After the small-diameter particles on the surface of the base material are damaged to varying degrees, inconsistent fluid outflow will occur; 3. . Due to repeated centrifugal molding and the high water content of the base material, it takes a long time to dry for demoulding, and the process is complicated; 4. The flow rate is unstable

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