SU1579527A1 - Filter for purifying water - Google Patents

Abstract

The invention relates to water purification filters and improves the efficiency of filter regeneration by increasing the uniformity of the collection of wash water. The filter design provides for the collection of waste wash water using a system of flat tray-extending trays 5, equipped with tubular floats 8 with clamps 12, and distribution of the upward flows of water by reflective boards 14 with spreading ridges 15. 3 Cp f-ly, 3 ill.

Description

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The invention relates to a technique for filtering liquids, namely, filters equipped with systems for collecting waste wash water, and can be used in filtering stations for purifying natural or waste waters.

The purpose of the invention is to equalize the intensity of washing over the area of the filters and increase the uniformity of the collection of wash water.

FIG. 1 shows a filter diagram, top view; in fig. 2 - the same section; in fig. 3 shows the node I in FIG. 2

The filter consists of body 1, main distribution pocket 2, drainage system 3 located under load 4, and a system of main collection trays 5 with flat horizontal bottoms 6 extending to pocket 2, vertical overflow edges 7 and tubular floats attached to them 8 with side plates 9. Trays 5 are equipped with brackets 10 fixed in the vertical walls of the collecting trays 5 on the flanges 11 and connected to the thread with clamps 12 by means of lock nuts 13. In the space between the collecting trays 5 at the level of their bottoms 6 are placed baffles 14 with tapering ridges 15 narrowing in the direction of the pocket. If the filter is drained by an additional pocket 16, instead of the baffles 14, a system of additional collecting trays 17 is arranged, expanding towards the pocket 16. Collection trays 17 are also equipped with tubular floats 8 and latches 12.

The filter works as follows.

During filtering, water is supplied to trays 5 and further to load 4. The filtrate is collected by the drainage system 3. During the regeneration process, the washing water flows through the drainage system 3 into the filter housing 1 and expands the load 4, the passage through which is contaminated by sediment, section from the surface of the grains of filter material. Then the waste wash water flows through the spillway edges 7 of the vertical walls of the collecting trays 5 into the inside and then into the pocket 2.

The tubular floats 8, mounted on the overflow edges of the 7 walls with the help of the side flaps 9, can operate in two versions. In the first embodiment, the buoyancy of the floats 8 is adjusted to the degree of equilibrium with their flooding exactly below the water level, which allows the floats 8 to independently take a horizontal position when rinsing water is fed into the filter. The clips 12 in this case serve only as control limiters of the ascent of the floats 8 at the moment the filter is switched to the filtering mode. Horizontal stops (not shown) may also serve as restraints for lifting trays 5, which can also serve as reinforcements above them in opposite sides of the filter.

When using the second variant, the floats 8 are positively buoyant, but their working position is horizontal by adjusting the fasteners 12 on the water level by rotating the brackets 10. The stability of the clamps 12 is secured by locking nuts 13. After the washing water reaches the bottom 6 of the collecting trays 5 and reflective shields 14 it enters the corridor between them, having due to the inclination of the diffusion ridges 15 a smooth expansion form, which causes It reduces the speed of movement of the upstream flow and restricts, thereby, the removal of filter material grains into collecting trays 5. The flat surfaces of the bottoms 6 and the shields 14 perform breakdown-protective functions, which contributes not only to preventing the transport of the lightest grains of liquefied load 4 from the filter, but also to increase the effect of washing them from loading.

Instead of reflective boards 14, additional collection trays 17 can be used, for servicing of which the filter should be equipped with the second karma HOW 16. The proposed combination of trays 5 and 17 allows to achieve maximum uniformity of the catchment and reduce the influence of their resistance to the flow of water on the quality of washing.

The application of the proposed device allows improving filter regeneration conditions, including increasing the uniformity of washing the filter media grains from contaminants throughout the entire flush load, eliminating unwashed zones, distortions of the filtering and supporting layers, as well as losses of the filtering material.

Claims (4)

1. A water purification filter, comprising a housing with a main distribution pocket, a filtering load, a drainage system located beneath it and main collecting and distributing trays with overflow edges, characterized in that, in order to improve the uniformity of the collection of wash water, it is provided with tubular floats, attached to the overflow edges of the trays by means of side plates, and the trays are made with flat horizontal bottoms, which are made expanding to the main distribution pockets. 2. The filter according to claim 1, characterized in that it is provided with reflective shields with stream spreading ridges installed between the trays at the level of their bottoms. 3. The filter according to claim 1, characterized in that it is provided with an additional distribution pocket and additional trays with flat horizontal bottoms extending to the additional pocket. 4. Filter on PP. 1-3, characterized in that the tubular floats are provided with clamps attached by means of brackets to the walls of the trays. 15 .Z