RU1787489C - Pipeline filter - Google Patents

Abstract

Purpose: purification of liquids flowing through the pipeline. SUMMARY OF THE INVENTION: A filter element installed in a pipeline has the appearance of equal in length, decreasing in diameter, mesh shells connected to one another by conical inserts. Inside the shells, scrapers are mounted with the possibility of reciprocating movement, which are made in the form of cylindrical rings with a sharp edge bent outward towards the flow. 1 C.p. f-ls, 3 ill.

Description

The invention relates to screen filters used to thicken mixtures transported by water in industrial and agricultural facilities.

A piping filter for water purification is known, comprising a housing, a mesh filter element mounted therein, a purification device and a waste collection path.

A disadvantage of the known device is its low reliability, significant energy consumption and low efficiency of the regeneration of the mesh filter element, which limits its use.

The closest technical solution to the claimed invention is a pipeline filter containing a housing, a filter element installed in it in the form of cylindrical mesh shells, connected in series, having the same length and successively decreasing diameters, annular scrapers and a dirt path ,

by which a decision was made to issue a copyright certificate.

The disadvantage of this device is the low efficiency of the regeneration of the shells due to the fact that when cleaning the shells of the scrapers, they are not simultaneously produced by their backwash with filtrate. This is because sediment accumulates on the outer surface of the shells, the scrapers are located on the outside of the shells, and the shells are axially movable and slide into one another. At the same time, the device is characterized by low operational reliability due to the shells being movable in the axial direction, which does not exclude their skewing and jamming between themselves during the cleaning process from the sediment.

The aim of the invention is to improve the quality of regeneration and reliability in operation.

In FIG. 1 shows a filter diagram, a general view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - node I in FIG. 1.

The filter contains a housing 1 with a mesh filter element 2 in the form of a truncated no00

with

Xi

oo

Xi

4

00

Yu

cone and the cleaning device in the form of scrapers 3. The filter element 2 is placed inside the housing 1 with a large base on the inlet side, the scrapers 3 are installed with the possibility of reciprocating movement by means of a tie 4 with braces 5, reinforced around the perimeter of the scrapers 3 A scraper 3 located at the inlet part of the dirt path 6 is equipped with spacers 7 connected to a spring 8, the other end of which is fixed to the crossbar 9. At the inlet part of the filter element 2, a block is passed through which the bar 4. is passed t gi 4 brought to the outside of the housing 1 through the seal. The filter element 2 is made in the form of cylinders 10, 11 and 12 of a mesh having the same length and successively decreasing diameters. The cylinders 10, 11 and 12 are interconnected by conical inserts 13 and 14. The scrapers 3 are installed in each shell and are made in the form of a cylindrical ring 15c with an outwardly curved edge 16 in contact with the inner surface of the shell with the formation of a cavity 17. The bent edge 16 placed on the inlet side of the filter element 2. It is advisable that the smaller base of each conical insert 13 and 14 be provided with a dirt hole visor 18. The filter housing 1 is mounted in the gap of the pipe 19.

The filter works as follows.

The contaminated liquid enters the filter element 2 and, being filtered through it, leaves a deposit on its inner surface. When the filtering ability of element 2 drops to the calculated values, it is cleaned. For this purpose, the scrapers 3 move the scrapers 3 along the cylinders 10, 1.1 and 12, cleaning the dirt that enters the dirt outlet path 6. Since the scraper 3 moves towards the fluid flow and is made in the form of a cylindrical ring 15 with a bent portion 16 , then in cavity 17, as a result of flushing with a stream, a vacuum forms, under the influence of which the filtrate from the outer part of the shell passes into its inner part of the flush the rest of the contamination in the holes of the shell. The impurities from the cavity 17 are drawn by the fluid flow washing the cylindrical part 15. The presence of the dirt peaks 18 facilitates the direction of the dirt sliding along the conical inserts 13 to the central part of the filter, which improves the conditions for the removal of dirt into the dirt exhaust path 6 and prevents re-discharge lumps of dirt on the inner surface of the filter element 2.

The technical and economic efficiency of the proposed filter in comparison with the prototype consists in improving the quality of the regeneration of the filter element by creating the proposed shape of the scrapers, which allow creating a vacuum in their back, under the influence of which the filtrate is backwashed by the filter surface of the filter surface that has just been cleaned of dirt item. This increases the filter cycle between regenerations up to 20-30%. The design of the filter element in the form of filter shells of different diameters makes it possible to eliminate the corrugated surface of the filter element and the sliding plate diaphragm, replacing it with simpler and ring-shaped scrapers, which greatly simplifies the design of the device. The presence of mudguard visors helps to reduce re-removal of contaminants to the surface of the filter element, which improves its working conditions.

Claims (2)

1. A pipe filter containing a filter element installed in the pipeline in the form of cylinders of a mesh having the same length and after. significantly decreasing diameters, annular scrapers and a discharge pipe, characterized in that, in order to improve the quality of regeneration and reliability, the cylinders are rigidly connected to one another by conical inserts, the scrapers are installed inside the cylinders with the possibility of reciprocating movement and are made in the form of cylindrical rings with a sharp edge bent outward, placed towards the flow of the medium being cleaned. 2. Filter pop. 1, characterized in that the discharge pipe is connected to the cylinder with the smallest diameter.