RU206091U1 - SELF-CLEANING LIQUID FILTER - Google Patents

Abstract

The utility model relates to filtration devices and can be used by any industry in the filtration process. Self-cleaning liquid filter, containing a housing, pipes for inlet of the initial liquid, outlet of the purified liquid, a drainage pipe, a filtering slotted screen made of a wedge-shaped wire and a distribution grid, on which the holes in the form of a truncated cone (nozzles) are arranged in rows along its entire area from the perimeter of the screen to the center ... The use of the proposed filter will increase the reliability and quality of filtration at high productivity, by reducing the pressure drop across the distribution grid and the filtering screen, by increasing the flow area of the distribution grid while maintaining the fluid flow at the surface of the filtering screen.

Description

The utility model relates to filtration devices and can be used by any industry in the filtration process.

Known self-cleaning liquid filter, containing a housing, pipes for the input of the original liquid, the output of the purified liquid, a drainage pipe, a distribution grid and a filter element. As a filtering element, a slotted screen made of wedge-shaped wire is used in conjunction with a distribution grid, with truncated cone-shaped holes (nozzles) located along the perimeter of the screen and continuous drainage of mechanical impurities through the drainage pipe. (Patent for utility model No. 109986, application No. 2011111703/05 dated March 28, 2011 "Self-cleaning liquid filter")

The disadvantage of this filter is a limited range of stable operation at high productivity, as a result of an increase in the flow rate of the filtered liquid, the pressure drop across the distribution grid and the filter screen increases, as a result of which the reliability of the filter and the quality of filtration decreases.

The utility model is aimed at improving the reliability and quality of filtration at high productivity, by reducing the pressure drop across the distribution grid and the filter screen, by increasing the flow area of the distribution grid while maintaining the fluid flow at the surface of the filter screen.

This is achieved by the fact that in a filter containing a housing with nozzles for the input of the initial liquid, the output of the purified liquid and a drainage pipe, a filter slotted screen of a wedge-shaped profile wire installed in the housing and a distribution grid located above it with holes in the form of a truncated cone - nozzles, the holes are located in rows across its entire area from the perimeter of the screen to the center.

The number and size of nozzles varies with performance.

FIG. 1 shows a general view of the filter, section.

FIG. 2 shows a distribution grid.

FIG. 3 shows a fragment of a slotted screen made of wedge-shaped wire.

The filter (Fig. 1) is a vertical vessel consisting of a cylindrical body 1, an upper cylindrical bottom 2, a lower cylindrical bottom 3, pipes for inlet of the liquid to be cleaned 4, outlet for the purified liquid 5, drainage pipe 6, filtering slotted screen 9 (Fig. 3 ) and located above it the distribution grid 7 (Fig. 2), on which the holes in the form of a truncated cone - nozzles 8, are arranged in rows over its entire area from the perimeter of the screen to the center.

The filter works as follows.

The initial liquid is fed through the supply pipe 4 into the body of the apparatus 1, enters the distribution grid 7, passes through the nozzles 8 into the inner part of the slotted screen 9. Passing through the screen 9, mechanical impurities are separated from the liquid, which are washed off the surface of the screen and are directed to the lower cylindrical bottom 3, and through the constantly open drainage pipe 6 are removed from the filter. The filtered liquid enters the space between the screen 9 and the cylindrical body 1, and is discharged through the outlet 5.

As a filter element, a slotted screen 9 is used, which is a lattice formed by rows of a wedge-shaped cross-section 10, from the side of the entry of mechanical impurities, the screen is an almost mirror surface, which greatly facilitates the process of washing out the retained particles. Self-cleaning of the filter screen is carried out due to jet streams of liquid at the surface of the filter screen. The trapped mechanical impurities are washed off by the continuously supplied liquid into the lower part of the filter, from where they are continuously removed through the drainage pipe.

The use of the proposed filter will increase the reliability and quality of filtration at high productivity, by reducing the pressure drop across the distribution grid and the filtering screen, by increasing the flow area of the distribution grid while maintaining the fluid flow at the surface of the filtering screen.

Claims (1)

Self-cleaning liquid filter, containing a housing with branch pipes for inlet of the initial liquid, outlet of the purified liquid and a drain pipe, a filtering slotted screen of wedge-shaped wire installed in the housing and a distribution grid located above it with holes in the form of a truncated cone, characterized in that the holes are in the form of a truncated cone - nozzles on the distribution grid are arranged in rows along its entire area from the perimeter of the screen to the center.

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