RU1834677C - Filter for cleaning water - Google Patents

Abstract

Usage: purification of natural and waste water by filtration. SUMMARY OF THE INVENTION: the filter comprises a housing 1 with a fine-grained filtering charge 3, over which horizontal rods 5 are mounted in several rows. The rods 5 are installed either in one direction or in overlapping rows with a gap exceeding the grain size of the load. 1 C.p. f-ls, 2 ill. 00 Words about VI VJ with

Description

The invention relates to devices for filtering water and can be used to purify natural and waste water.

The purpose of the invention is to increase the productivity and quality of charge recovery.

For this purpose, a filter containing a housing with a granular load, supply and discharge pipelines, is equipped with horizontal rods installed at least two rows above the granular load, and the gap between the rods is made larger than the grain size of the load.

In addition, the rods in adjacent rows are offset relative to each other.

Fig. 1 shows a cross-sectional filter (filtration state); Fig. 2 is a sectional view of a filter (regeneration state).

The filter consists of a housing 1, in the lower part of which there is a support layer of gravel or crushed stone 2, on which a filtering charge 3 is located, which can be made of silica sand, expanded clay or other fine-grained material. Above the filter load 3, on the projections-supports 4, rods 5 are installed located in a horizontal plane. The gap between the rods exceeds the size of the granules (grains) of the load. The rods 5 can be installed in several rows or in the same direction or in intersecting rows. When placing the rods in one direction, it is advisable to displace the rods of adjacent rows relative to each other.

The rods 5 may be round, rectangular or any other section.

The filter is equipped with feed liquid supply, filtrate discharge, and regeneration systems, including a supply pipe b for supplying a source fluid, a filtrate discharge pipe 7, a wash liquid supply pipe 8, an air supply pipe 9, a chute 10 for distributing the feed and collecting the wash liquid, pipe 11 to drain the wash fluid.

The filter works as follows. In the filtration mode, the initial contaminated liquid passes through the pipe 6 into the cavity of the filter housing 1 and is distributed through the groove 10 over the entire cross section of the filter. The liquid entering the filter housing first passes through the gaps between the rods 5. where it is cleaned of the largest inclusions retained in the gaps between the rods, as well as from the suspension adhering to the surface of the rods. Then the partially purified liquid passes through the granular filter charge 3, is finally freed from the suspension contained in the liquid, and then

The cleaned liquid is discharged through line 7 outside the filter.

After the filter charge is filled with delayed impurities, the filter is regenerated. The regeneration of the filter charge is carried out in an upward flow by supplying liquid to the bottom of the filter. To do this, the shutters on the source liquid supply pipe b and the filtrate discharge pipe 7 are closed and the valves on the purge liquid supply pipe 8, the air supply pipe 9 and the wash liquid discharge pipe 11 are opened.

while the grain filter load under the action of the upward air-water flow is weighed and, expanding, rises to the upper part of the filter housing, passing through the gaps between the rods

5. The flow of the washing liquid, together with the filtering granular charge, the passage in the gaps between the rods 5, changes its speed many times while dividing it into many upward flows and then merging them into a common stream. In this way, favorable conditions are created for multiple collisions of the grains of the filter charge with each other, which ensures the abrasion and separation of contaminants from the grains of the filter charge.

The intensity of the wash flow is taken so that the grains of the filter charge rise to the full height of the rods.

The supply of the filter with rods mounted above the granular charge allows to increase the efficiency of the filter due to improved regeneration (deeper regeneration, more thorough washing of the granular filter charge) and a higher degree of liquid purification, as well as increased filtration area and, consequently, increased

its performance.

Claims (2)

1. A filter for water purification, comprising a granular charge housing, inlet and outlet pipelines, characterized in that. in order to increase the productivity and quality of the regeneration of the load, it is equipped with horizontal rods installed not less than two rows above the granular load, and the gap between the rods is made larger than the grain size of the load. 2. The filter according to claim 1. on the basis of the principle that the rods in adjacent rows are offset relative to each other. FIG. 2