METHOD OF LIQUID PURIFICATION AND PRECOAT LAMELLAR FILTER FOR ITS REALISATION Russian patent published in 2016 - IPC B01D37/02 B01D29/01 

FIELD: chemistry.

SUBSTANCE: method of liquid purification includes the creation of a precoat layer from sludge wastes on a filtering surface. Before precoating of the filter layer a coagulant is introduced into a purified liquid and flakes of coagulated in the liquid pollutions, which become the base of the precoat layer, are created, creation of the precoat layer is carried out by the immersion of filter elements into the precoat solution by the gradual filling of the tank with the precoat solution. The precoat solution after passing through the filter elements is applied repeatedly until the completed creation of the precoat layer on the entire height of the filter element. The precoat lamellar filter includes the filter elements, which contain a perforated frame, in each side of which a filtering material is placed in the form of layers, fastened on the contour. Each perforated frame is made in the form of a flat hollow plate with the internal size of not less than 1 mm. The plates are combined into a common branch pipe with their lower part to discharge the purified liquid.

EFFECT: simplification of the technology of the precoat layer formation and reduction of costs for filter servicing.

5 cl, 2 dwg