SU1741857A1 - Settling tank - Google Patents

Abstract

A sump for water purification from undissolved substances. SUMMARY OF THE INVENTION: A floating load filter is located in a collection tray of purified water. In the filtration chamber, a device for its water-air flushing is placed under floating loading. A tray for collecting wash water is fixed on a semi-submersible wall installed in front of the filter. The filter is divided by transverse partitions into separate sections. In the sump combined the processes of settling and filtering during continuous operation of the sump. 2 or

Description

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The invention relates to the mechanical purification of water and can be used in stations for the purification of natural and waste waters,

Known sump containing a reservoir within which is placed the annular collection tray of purified water with overflow wall 1.

A disadvantage of the known clarifier is a low degree of water purification, since even with a long time of settling, the residual concentration of undissolved substances in the water after the settling tank is at least 15 mg / l. Therefore, in order to further reduce the concentration of undissolved substances in the water being treated, additional purification of water after the settling tank at the filtration station is provided, which leads to a sharp increase in capital and operating costs.

The closest to the proposed settling tank for purifying water from insoluble substances is a device for separating suspended solids from liquid 2, in which an annular collection tray of purified water with an overflow wall and a floating loading filter located between the semi-submersible wall and the overflow wall of the precast are placed. tray of purified water.

However, this design does not allow to achieve deep water purification, it has low reliability in operation and high operating costs due to the imperfection of the regeneration unit of the filter load. This is due to the presence of moving elements of the regeneration unit, as well as the leakage of contaminants into the collecting tray of purified water at the time of regeneration of the floating load.

The purpose of the invention is to increase the degree of water purification, operational reliability and lower capital and operating costs.

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The goal is achieved by the fact that a settling tank for purifying water from non-soluble substances containing a tank, an annular collection tray of purified water with an overflow wall and a filter with a floating load, located in the collection tray of purified water, is equipped with a semi-submersible wall installed in front of the filter, the upper edge of which is located above the water level in the sump, with a device for air-and-water washing of the filter and a tray for collecting the washing water, mounted on the semi-submersible burner on the side facing the filter, This filter is provided with transverse partitions, to form a set of sections, and the longitudinal partition disposed to form the filtered water outlet chamber communicating with the collecting tray by means of a submerged weir.

In comparison with the known devices, the proposed design of a settler for purifying water from undissolved substances is characterized in that a floating partition is installed in front of the floating load filter, which separates it into the filtered water drainage chamber and the filtration chamber, and the tray for collecting the wash water is fixed on the semi-submerged wall . This makes it possible to carry out additional water purification after settling. The presence of a filtration chamber allows the floating filter loading to be relieved with a water wash, and the presence of a filtered water chamber communicated with the collected water channel through the submerged weir maintains a constant working pressure on the filter. and prevents the filter media from being carried away with filtered water. Fixing the wash water collection tray on the semi-submersible wall allows the removal of the wash water due to the airlift effect during the water-air operation, washing, and performing its overflow edge above the maximum water level in the septic tank - to prevent the purified water from being removed from the settling basin of the construction zone to tray. Supplying the filter with transverse partitions with the formation of sections allows the regeneration of the floating load to be performed sequentially in each section, which makes it possible not to disconnect the settling tank from operation for the regeneration time. Thus, the combination of design solutions in the proposed sump for water purification from undissolved substances allows to obtain new properties

Namely: to increase the degree of water purification, reliability in operation and to reduce capjal and operating costs.

FIG. 1 shows a sump for water purification from undissolved substances, a plan; in fig. 2 shows section A-A in FIG. one.

The sump for water purification from undissolved substances includes a tank 1 with a collection tray 2 installed in it

0 purified water with an overflow wall 3 and a semi-submersible wall 4 located in front of it, a floating discharge filter 5 placed in a collection tray of purified water 2 along its entire length, device 6

5 for its water-air washing, a tray 7 for collecting the washing water, fixed on the semi-submersible wall 4 on the side facing the filter. The filter is provided with a longitudinal partition 8 dividing it.

0 to the chamber 9 of the filtered water outlet, which is connected with the collecting tray 2 of purified water through a flooded overflow

10, and a filtration chamber 11 adjacent to the overflow wall 3. Floating load

5 5 and the device 6 for its water-air washing located under it are placed in the filtration chamber 11. The tray 7 for collecting the washing water has an overflow edge 12 which is located above the maximum level 13 of water in the sump. The filter is provided with transverse partitions 14 dividing it into sections 15.

The sump for water purification from undissolved substances works as follows,

The water in the tank 1 through the overflow wall 3 enters the filtration chamber 11, where, after passing through the floating filter load 5, it is subjected to further cleaning by filtration and then through the chamber 9 of the filtered water outlet, overflowing through the submerged spillway 10, enters the collecting tray 2 purified water from where it is removed through the discharge pipe. Bog5 dosliv 10 allows you to maintain a constant working pressure in the filtration chamber

11, and the presence of the chamber 9 of the filtered water prevents the carrying of the floating load 5 into the collecting tray 2 of the purified water.

0 Since the overflow edge 12 of the tray 7 for collecting wash water is located above the maximum level 13 of water in the sump, water does not fall into the tray 7 for wash water. When a floating load is contaminated, the 5 filter in one of the. sections 15,

5 bounded by baffles 14, air is supplied to its water-air washing system 6, this expands the floating load 5 and, due to the airlift effect, increases the liquid level in the filtration chamber 11 above the overflow edge 12 of the tray 7 to collect the wash water. When the floating load 5 expands, its granules collide with one another, causing the contaminants to separate from the floating load 5 and, under the action of the water-air mixture stream, are transferred to the tray 7 to collect the washing water, from where they are removed for recycling

The presence of a semi-submersible wall 4 installed in front of the overflow wall 3. prevents the ingress of contaminants removed from the floating load 5 into the settling zone of the tank 1, and the presence of transverse partitions 14 prevents these contaminants from entering the adjacent sections. After the flushing of the floating load 5 of the section brought to regeneration is completed, the air supply to its water-flushing device 6 is stopped, the water level in the filtration chamber 11 is lowered, and the operation of this section that was in the flushing mode returns to the filtration mode. The presence of partitions 14, which make the filter on section 15, allows the regeneration of the floating filter loading 5 of the filter to be carried out sequentially in sections, which makes it possible to carry out continuous sump

The proposed sump allows you to efficiently purify water by combining the processes of settling and filtering during the continuous operation of the sump;

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its reliability in operation due to the exclusion of special mobile mechanisms for the regeneration of filter loading, to reduce capital and operating costs due to the placement of the filter in the sumps of high-capacity stations and the continuity of their work.

Claims (1)

DETAILED DESCRIPTION A settling tank for purifying water from undissolved substances, comprising a tank, an annular collecting tray of purified water with an overflow wall and a floating-load filter, located in the collecting tray of purified water, characterized in that, in order to increase the degree of purification of water, operation and reduce capital and operating costs, it is equipped with a semi-submersible wall installed in front of the filter, the upper edge of which is located above the water level in the sump, with a device for water-flushing The filter is equipped with transverse partitions installed with the formation of sections and a longitudinal partition with the formation of a filtered water outlet chamber communicating with the collecting tray by means of a flooded weir. No Phie.1