Filtering elements for hydraulically squeezing and extruding out mud cake

Abstract

The invention relates to filtering elements. A set of filtering elements is clamped in a pressure bearing structure of a flexible pipe squeezing machine along the direction of squeezing force; the filtering elements are characterized in that at least one water-permeable plate is arranged in a filtering chamber; the front and rear surfaces of the water-permeable plate are water-permeable filtering surfaces; the water-permeable filtering surfaces of the water-permeable plate are vertical to the direction of squeezing force; the water-permeable plate is located in the filtering chamber at the upside of a lower flange; and each water-permeable plate comprises a plate type filtering medium, an upper locking plate pressure strip, an upper locking plate strip, a filtering cloth tightening strip, a filtering cloth tightening pressure strip and at least one filtrate cavity communication pipe mouth. The working principle of the filtering elements is as follows: the filtering chamber of a part of flexible filtering elements is filled with raw materials to be taken as pressurized filtering elements; the filled raw materials expand slowly by utilizing other filtering elements as pressure-applying filtering elements; the pressurized filtering elements filled with the raw materials are compressed by utilizing the expansion force, so that the raw materials are squeezed and dehydrated; the mud cake in the filtering chamber is extruded out by utilizing the expansion force; immediately, the filtering elements are converted into the pressure-applying filtering elements; and, by means of such a cycle, the dehydration process of the raw materials is completed.

Description

technical field

[0001] The invention relates to a filter element for solid-liquid treatment of viscous and fine-grained substances, which is used for hydraulic pressing and extruding mud cake discharge, especially suitable for papermaking wastewater treatment, sludge treatment, river dredging mud treatment, wet smelting Dehydration in waste water treatment, coal washing waste water treatment and livestock and poultry breeding pollutant treatment. Background technique

[0002] The filter element proposed by the present invention is the improvement of the filter element of the flexible pipe press that adopts hydraulic pressing and extruding mud cake that I propose or is used as a general filter element of this type of squeezing device. With a little improvement, it can replace the traditional filter element. The plate and frame filter element of the plate and frame press machine can also replace the diaphragm plate and frame filter element of the plate and frame diaphragm pres...

Images