SU971412A1 - Pressure filter for purifying natural and waste liquors - Google Patents

Description

The invention relates to apparatus for filtration and can be used for water purification in domestic drinking and recycled industrial water supply and in chemical technology.

Known for clarifying liquids and widely used pressure filters with granular loading, made in the form of a drip-shaped cylindrical body with connections for supplying source water, draining filtrate, supplying water for washing and draining washing water 1.

When filtering water containing a significant amount of impurities, the latter are retained mainly by the upper layer of the filtering load and a dense layer of retained contaminants forms on its surface, which prevents their penetration. To a considerable depth of the filtering load. This leads to a deterioration in the technological performance of the filters: a decrease in the soil capacity, a reduction in the duration of filtration, and an intensive increase in pressure losses. All this necessitates frequent shutdowns.

filters for washing, which reduces the useful life of filters and reduce their performance.

The closest technical solution to the invention is a filter for cleaning a liquid, comprising a housing with a drainage bottom, on which a filter cartridge of granular bulk material is placed, branch pipes for supplying and discharging filtered and rinsing liquid, while a pulsation chamber is installed under the drainage disk WG is a double spring-loaded valve | Pan, blocking the inlet and outlet openings E2.

Such a filter has a higher performance due to the effect on the filter loading of water hammering that occurs when the valve is opened and closed and causes an increase in the porosity and load capacity of the granular layer.

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However, during the operation of a known filter, in the process of filtering a liquid, intensive silting of the load occurs, the pressure loss increases, the filtration rate decreases, which leads to a weakening

Claims (2)

Claim 1. A pressure filter for cleaning natural and wastewater, comprising a housing with inlet and outlet pipes, a drainage bottom, a granular filter load located on it and a pulsation chamber, characterized in that, in order to increase the load capacity of the load, the pulsation chamber is made in the form of an axially located in the case, muffled from the bottom of the pipe, in the upper part of which a piston is installed, and holes are made in the lower part. 2. Filter pop. 1, characterized in that the pipe is connected to the drainage bottom and the holes in the pipe are made directed upward at an angle to the vertical.