When the filter is used in the process, the solid particles in the suspension are large and the particle size is uniform, the filter slag layer clearance will be smoother, and the filtrate will pass through the filter residue layer at the time of use, the speed will be greater, and the application The agglomeration agent aggregates fine particles into larger agglomerates, which is advantageous for increasing the filtration speed.
The filter will be applied to the filter with a faster settling velocity of the solid particles in the upper part of the filter medium. This will make the direction of the filtration and the direction of gravity consistent, and the coarse particles settle first, which can reduce the filtration. Blockage of media and filter layer.
Mixing coarser solid particles such as diatomaceous earth and expanded perlite into difficult-to-filter suspensions (such as colloids) can loosen the filter residue layer; when the filtrate viscosity is high, the suspension can be heated to reduce the viscosity. These measures can speed up the filtration rate.
Between the units in the filter combination, the backwashing process alternates, and the work and backwash conditions are switched automatically to ensure continuous water discharge; the backwashing consumes only a small amount of water, accounting for only 0.5% of the water output; With air-assisted backwash, self-consumption can be reduced to less than 0.2%. High-speed and thorough backwashing takes only tens of seconds to complete.
The filter consists of a housing, a multi-element filter, a backwashing mechanism, and a differential pressure controller. The diaphragm in the housing divides the inner cavity into upper and lower chambers. The upper chamber is equipped with a plurality of filter cores, which fully filters the space, significantly reduces the volume of the filter, and installs backwashing in the lower chamber. Suction cups.
When the filter is working, the turbid liquid enters the lower chamber of the filter through the inlet, and enters the inner cavity of the filter through the baffle hole. Impurities larger than the gap in the filter core are trapped, and the net fluid passes through the gap to the upper chamber and is finally sent out from the outlet.