SU1673162A1 - Water cleaning filter - Google Patents

Abstract

The invention relates to devices for the purification of natural and waste waters from mechanical impurities and makes it possible to increase the duration of the filtration cycle and reduce the consumption of wash water. The filter for water purification from mechanical impurities contains a rectangular casing 1 with a bottom 2 made in the form of a truncated pyramid, a partition wall 3 in the form of a triangular pyramid located on the bottom 2, drainage distribution pipes 4 and 5, located between the partition wall 3 and walls the bottom 2, the drain trays 9 and 10, placed in the upper part of the housing 1 on its opposite walls parallel to the drainage and distribution pipes 4 and 5, and filtering granular load 14. In the regeneration mode, when the wash water supplied through one drainage and distribution pipe and simultaneously discharged through a drainage tray located on the opposite wall of the casing, provided that abrupt cessation of the flow of wash water forms an inclined surface of the filtering granular load relative to the cross section of the filter, which allows to increase the filtration area. 2 Il.

Description

The invention relates to devices for the purification of liquids from mechanical impurities and can be used in various fields of industry, in particular for the purification of natural and waste waters.

The purpose of the invention is to increase the duration of the filtration cycle and reduce the consumption of wash water by increasing the filtration surface.

FIG. 1 shows a filter for the purification of water in filtration mode, transverse

incision; figure 2 - the same, in the mode of regeneration, the cross-section.

The filter for water purification from mechanical impurities consists of a rectangular housing 1, with a bottom 2. made in the form of a truncated pyramid. On the bottom 2 along the axis of the filter housing 1 there is a separating partition 3, made in the form of a triangular prism. In the intervals between the partition wall 3 and the walls of the bottom 2, drainage-distribution pipes 4 and 5 with openings are located, which are connected to a branch pipe to output the cleaned

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The invention relates to devices for the purification of liquids from mechanical impurities and can be used in various fields of industry, in particular for the purification of natural and waste waters.

The purpose of the invention is to increase the duration of the filtration cycle and reduce the consumption of wash water by increasing the filtration surface.

Figure 1 shows a filter for water purification in filtration mode, a cross section; figure 2 - the same, in the mode of regeneration, the cross-section.

The filter for water purification from mechanical impurities consists of a rectangular housing 1, with a bottom 2, made in the form of a truncated pyramid. On the bottom 2. On the axis of the filter housing 1 there is a separating partition 3, made in the form of a triangular prism. In the intervals between the partition wall 3 and the walls of the bottom 2 there are drainage distribution pipes 4 and 5 with openings connected to a branch pipe for outputting purified water 6 and a branch pipe for supplying washing water 7 with a three-way switch 8, parallel to the drainage on the upper part of the body 1 The o-distribution pipes 4 and 5 are equipped with drain trays 9 and 10 connected to a branch pipe for transporting contaminated wash water 11 and to a branch pipe for supplying purified water 12 with a three-way switch 13. The filter housing 1 is filled with filtering granular load 14, for example, quartz sand or crushed expanded clay.

The filter for water purification from mechanical impurities works as follows.

In filtering mode, the nozzle for supplying wash water 7 and the nozzle for withdrawing contaminated wash water 11 are closed, and the nozzle for feeding purified water 12 and the nozzle for withdrawing purified water b are open, while the three-way switches 8 and 13 are set in such a position that in collaboration there was a drainage pipe 5 and a drain tray 10 located on opposite sides of the housing 1 as shown in FIG. The purified water, directed from the drain pan 10 in the upper part of the housing 1, is filtered at a given speed through an increased filtration area formed by the inclined surface of the filtering granular charge 14 relative to the cross section of the filter housing. The flow of the purified water from any inclined surface of the filtering granular load 14 to the drainage-distribution pipe 5 due to the inclined walls of the partition wall 3 becomes relatively the same, which ensures a stable quality of treated water. The water cleared of mechanical impurities in the layer of filtering granular feed is collected in the drainage-distribution pipe 5 and through a three-way switch 8 through the nozzle 6 is brought to the consumer.

In the regeneration mode after completion of the filtration cycle, the duration of which is set, for example, by

5 reduce the flow rate of purified water, the filter works as follows. Overlap the nozzles for supplying purified water 12 and the nozzle for the withdrawal of purified water 6 and open the nozzle for

0, the supply of wash water 7 and the nozzle for the discharge of contaminated wash water 11, while the three-way switches 8 and 13 are set to the opposite of the initial position, when simultaneously operating

the drainage distribution pipe 4 and the collecting tray 9. as shown in FIG. 2. Wash water is supplied to the filter with an intensity that provides for the relative expansion of the layer of contaminated filtering load 14 in the washing zone by 25-30%. In the process of regeneration of the filtering granular load 14 in the upward flow of wash water from a large

5, a linear turbulent circulation of the suspended layer of the grain of the filtering load 14 occurs at the linear velocity, resulting in a high degree of regeneration with a low flow rate of wash water.

After the regeneration of the filtering charge is completed, the supply of wash water through the nozzle 7 stops abruptly, which prevents horizontal alignment

5 of the surface of the filtering granular charge 14 and the hydraulic classification is reduced. Subsequently, a nozzle is closed to remove contaminated wash water 11. As a result of this cycle

0 regeneration forms an inclined surface of the filtering granular charge.

The proposed filter provides the possibility of alternately supplying wash water and discharging contaminated wash water, respectively, through the drainage distribution pipe 5 and the drain pan 10 or through the drainage distribution pipe 4 and the drain tray 9 by switching three-way switches 8 and 13.

The filter for water purification from mechanical impurities with an inclined surface of the filtering granular charge by increasing the filtration area at the same time allows to increase the duration of the filtration cycle and reduce the consumption of wash water.

Claims (1)

The claims of the filter for water purification from mechanical impurities, comprising a rectangular housing with nozzles for input and output of the water to be purified and washed, the bottom in the form of a truncated pyramid, filter spherical granular load measured by loading and drainage distribution pipes and drain chutes located opposite casing lines, which is provided with a separating nepeto to increase the duration of the filtration cycle and reduce the consumption of wash water. rare in the form of a triangular prism installed on the bottom along the axis of the body and drainage-distribution pipes are placed between the separation barrier and the walls of the bottom,  Fm.1 p 2