Filtering mode with pressurizing altered porosity of elastic filter material layer

Abstract

The present invention relates to filtering method with pressurizing altered porosity of elastic filter material layer, and belongs to the field of sewage treating technology. The present invention features that in the upper part of the filter material layer inside the filtering column, is set one filter material compressing device. The filter material compressing device is one pressurizing plate capable of moving up and down, and the elastic filter material is sponge, fiber bundles or fiber balls. During filtering sewage, the filter material is compressed in the compression ratio of 75-85 % and the flow rate is controlled with a flowmeter, so as to reach certain treating effect.

Description

technical field [0001] The invention relates to a filtering method for changing the porosity of an elastic filter material layer by pressurizing, and belongs to the technical field of sewage filtering and treatment. Background technique [0002] Filtration is a common treatment process used to remove impurities such as solids from water or other liquids. Traditional filter materials include filter materials with smaller particle sizes such as quartz sand, ceramsite, and anthracite. New filter materials include fiber balls, fiber bundles and other filter materials with large pores (voids). Using the traditional filtering method of filter material, the filter material is compacted by the self-weight of natural accumulation and the filtering water pressure, the pores between the filter materials are small, so that smaller particles can also be filtered out, but due to the smaller pores between the filter materials Small, the upper layer of the filter material layer is easily ...

AI Technical Summary

Problems solved by technology

Using the traditional filtering method of filter material, the filter material is compacted by the self-weight of natural accumulation and the filtering water pressure, the pores between the filter materials are small, so that smaller particles can also be filtered out, but due to the smaller pores between the filter materials Small, the upper layer of the filter material layer is easily blocked, so that the middle and lower layers of the filter material layer cannot fully function

The pores between the new filter materials are quite large. Although there is a larger space to accommodate particles and a higher filtration speed, the quality of the effluent is poor because the larger particles cannot be retained.

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