Ceramic particle for adsorbing wastewater impurities

Abstract

The invention relates to a ceramic particle for adsorbing wastewater impurities. The ceramic particle comprises an inner layer and an outer layer, wherein the outer layer contains the following raw materials in parts by weight: 35-45 parts of activated aluminum oxide, 25-35 parts of calcined kaolin, 25-30 parts of anatase type titanium dioxide, 4-6 parts of glass fibers and 1-3 parts of vermiculite, and the average particle size of the raw materials of the outer layer is 50-80 microns; and the inner layer contains the following raw materials in parts by weight: 45-55 parts of common aluminum oxide, 25-35 parts of common kaolin, 15-20 parts of rutile type titanium dioxide, 3-8 parts of the quartz and 2-4 parts of preprocessed graphene, and the average particle size of the raw materials of the outer layer is 10-30 microns. The ceramic particle prepared by virtue of the invention has a double-layer structure, is capable of easily forward adsorbing the wastewater impurities, easy to backwash and desorb and low in desorption pressure and has the good desorption effect, and the water filtration efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a ceramic particle for absorbing waste water impurities. Background technique [0002] Porous ceramics are commonly used filter materials in water treatment. The general operation process is: under pressure, let the waste water pass through the filter material to filter to obtain clean water; after a period of operation, the filter must be purified by backwashing. Backwashing is to apply pressure on the filter in the opposite direction to the direction of the wastewater, so that the clean water passes through the filter in reverse, and the impurities accumulated in the filter are washed away. [0003] Ceramics for filtration are generally made of porous structure, which can absorb more impurities in wastewater. However, ceramics with a porous structure are easier to adsorb impurities, but more difficult to backwash and desorb. This is not only because it is difficult fo...

AI Technical Summary

Problems solved by technology

However, ceramics with a porous structure are easier to adsorb impurities, but more difficult to backwash and desorb. This is not only because it is difficult for a large number of pores to be evenly impacted by reverse pressure to desorb impurities, but also because the pores of porous ceramics themselves There are a large number of active surface groups, which are difficult to disengage after combining with impurities through hydrogen bonds or van der Waals forces

In order to break away from the binding force between the pore surface and impurities, the reverse pressure must be increased. Excessive pressure may directly damage the internal structure of porous ceramics, causing them to crack and collapse, making them unusable.

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