A kind of mixed filter material and filter device with the mixed filter material

Abstract

The invention discloses a mixed filtering material and a filtering device with the same, and relates to the technical field of water treatment. The mixed filtering material is prepared by uniformly mixing two or more filtering material particles, wherein a single variety of filtering material particles is uniform in particle size distribution, and the gravities, shapes and particle sizes of different varieties of filtering material particles enable the settling speeds of the different varieties of filtering material particles in water to be in preset ranges; and the filtering device adopts theabove-mentioned mixed filtering material for filtration. The mixed filtering material and the filtering device with the same provided by the invention have the following advantages: different filtering material particles with same or similar settling speed are mixed, so the mixed filtering material does not generate layering in the process of backwashing; and the mixed filtering material is uniformly distributed from top to bottom and can exert the effect of filtering, so the filtering effect of the mixed filtering material is improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a mixed filter material and a filter device with the mixed filter material. Background technique [0002] The filter device is also called a shallow medium filter device. It mainly uses quartz sand as a filter material. The water flow with high turbidity is filtered through a certain thickness of quartz sand layer, which can effectively intercept and remove suspended solids, organic matter, and colloidal particles in the water. Wait. [0003] When the filter device is working, due to the interception effect of the quartz sand layer, dirt will be mixed between the particles of the quartz sand filter material, and as the work progresses, the amount of stolen goods will gradually increase, so that the filter device will perform backwashing after working for a certain period of time. , that is, the quartz sand filter material is backwashed with flushing water that is opposit...

AI Technical Summary

Problems solved by technology

[0003] When the filter device is working, due to the interception effect of the quartz sand layer, dirt will be mixed between the particles of the quartz sand filter material, and as the work progresses, the amount of stolen goods will gradually increase, so that the filter device will perform backwashing after working for a certain period of time. , that is, the quartz sand filter material is backwashed with flushing water that is opposite to the direction of water flow during work, but the particle size of the quartz sand cannot be completely the same during preparation, and the particle size of the quartz sand is prone to wear and tear, resulting in uneven particle size. The larger particles of quartz sand are gradually deposited downward, such as figure 1 As shown, at this time, the particle size of the upper layer of quartz sand is small, and the distance between the particles is small, while the distance between the quartz sand with larger particle size in the lower layer is larger.

Images