SU1720684A1 - Filter for cleaning liquid from non-soluble admixtures - Google Patents

Abstract

The invention relates to the purification of liquids by filtration and improves the efficiency of the filter. The filter housing 1 contains a package of corrugated wave-like sheets mounted vertically on non-crimped ribs so that the tops of the corrugations of adjacent sheets are facing each other, have a gap of 0.8-1.1 mm, and the radius of the wave-like curves of the corrugation is 1.4-1 6 mm. When filtering from the bottom up, the cleaned liquid flows through the distribution system 2 into the supporting gravel layer 3, and then into the corrugated nozzle 4, the adjacent sheets of which form channels of variable cross section. 1 hp ff, 3 ill.

Description

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The invention relates to devices for purifying liquids from insoluble impurities by a filtering method, namely, devices for purifying natural and waste waters.

The purpose of the invention is to increase the efficiency of the filter by increasing the soil capacity and reducing the consumption of wash water.

Figure 1 shows the filter circuit in the filtering mode, longitudinal section; 2 shows a corrugated nozzle; on fig.Z - detail corrugated nozzles (two adjacent plates).

The filter (Fig. 1) consists of a rectangular housing 1, in the lower part of which are distribution systems: water for 2 and air 3. The filter layer 4 (corrugated head) is made of a package of corrugated wavelike plates (Fig. 2). The height of the corrugated nozzle is 2500 mm, and the plate thickness is 1 mm. The corrugated plates are mounted horizontally with one gap relative to another, the wavelike corrugations are placed horizontally, the tops of the corrugations of the adjacent plates are directed towards each other. The radius of the wave-like corrugations should preferably be 1.4-1.6 mm, and the width of the gaps between the vertices of the corrugations should be 0.8-1.1 mm (FIG. 3).

The corrugated nozzle rests on supporting gravel layers 5 consisting of a lower layer (fraction 16-18 mm, 300 mm high) and an upper layer (fraction 8-4 mm, 200 mm high).

Above the filter layer are prefabricated chutes 6, connected to channel 7 and pipeline 8 for filtered water (filtrate).

Pipe 9 is used to supply the wash water to the water distributor 4 4 O O Os 00 system 2, pipe 10 to supply compressed air to the air distribution system 3. Pipelines 11 to drain the washing water, pipelines 12 to supply the source water.

The filter works as follows.

The filtration process is carried out from bottom to top. The original water is supplied through the pipeline 12 and through the water distribution system 2 enters the supporting gravel layer 3, and then into the corrugated nozzle 4 (figure 2), made of a package of wavelike plates with a corrugation of 1.4-1.6 mm placed vertically on the corrugated ribs with a gap relative to each other so that the tops of the corrugations of adjacent plates are directed towards each other with a gap width of 0.8-1.1 mm between them. Thus, two adjacent plates form a channel of variable cross section (Fig. 3) and conditions are created in the packing for retention and accumulation of suspension, similar to those in a granular load.

Plates of corrugated nozzles can be made of metal, plastic or other material.

Having passed the nozzle 4, the purified water is collected by the channels 6, from which it enters the collecting channel 7 and is led through the pipe 8 from the filter.

In order to regenerate the filter layer and remove the accumulated sediment, flushing is carried out by supplying water through the water distribution system 2 and air through the air distribution system 3.

The design of the filtering layer allows to increase the filter capacity by increasing the space between the profiled plates compared to the intergranular porosity of the granular load, since the space between the corrugated plates, in which sludge accumulation occurs, has a large relative volume compared to the porosity of the granular layer. So the intergranular surface of quartz sand is 4042%, for crushed materials this value is up to 60%, and this device has a porosity (by analogy, we use this term) 71%.

Due to an increase in the filtration capacity of the filter layer, the filter allows purification of water with high turbidity values of the source water (more than 120 mg / l), while increasing the interregenerative period.

When using a corrugated nozzle instead of a granular load, the cost of regenerating the filtering layer is significantly reduced, as the washing water consumption is reduced, the displacement of the loading layers is eliminated, and hence the need for a laborious process of reloading the filtering material;

the regeneration process is simplified; the removal of grains of filter material during regeneration is excluded; loss of filtering material during operation due to abrasion and grinding of grains during filter washing (regeneration) is eliminated.

The corrugated nozzle is an element of factory production and increases the industrialization of the construction and installation of filtering facilities in comparison with the laborious and lengthy process of preparing a granular filtering material, loading it layer-by-layer into the body and then washing the grains from dust.

Claims (1)

Invention Formula A filter for cleaning liquids from insoluble impurities, comprising a housing with a filter layer placed in it, a lower drainage-distribution system and collecting chutes, which is made so that in order to increase the capacity and reduce the wash water consumption, the filter layer is made in the form of installed with a gap of vertical corrugated plates with a horizontal arrangement of wavy corrugations, the tops of which the adjacent plates are directed towards each other. -h 7 0.8-pmp Ftse.Z