SU1710092A1 - Thin-layer settler - Google Patents

Abstract

The invention relates to a device for water purification by means of sedimentation and is intended for the removal of suspended solids from wastewater and natural waters in public utility enterprises and in other national sectors. The aim of the invention is to increase the efficiency of the settling tank and ensure continuous removal of sludge. The thin-layer settling tank contains a cylindrical body, a precipitating element in the form of a screw partition attached to the central pipe with openings located at the level of the vertex forming a partition, a sludge chamber, pipelines for the supply of treated water and removal of purified water and sediment. On the precipitating surface of the screw partition from the periphery to the central pipe, at an acute angle to the direction of water movement, spiral-shaped partitions are located collecting sediment, the height of the bulkheads decreasing with each turn of the partition, and in the upper part of the central tube there is an additional drainage pipeline clarified water. T hp f-ly, 1 ill. (L

Description

The invention relates to devices for water purification by the method of settling. It is intended for the removal of suspended solids from wastewater and natural waters, to utilities and other areas of the national economy.

A known liquid purification device, comprising a housing and a settling tank coaxially mounted therein, with a central pipe for supplying the initial liquid, a pipeline for draining the clarified liquid, a filtering material and a siphon.

The disadvantage of this design is the operation of the siphon (sludge removal system). In order for a flushing of the filter charge to occur, a siphon must pass through a considerable flow of water, and consequently, the diameter of the siphon must be large enough to pass this flow. With a large siphon diameter, its charge is impossible, since a siphon, even if all the flow of treated water goes through it, will work as a normal overflow and all the water will go down the drain without the formation of suction. From the foregoing it follows that the operation of this device is possible only with a small diameter of the siphon, as a result of which the washing of the filtering material is difficult.

According to the achieved result and technical essence, the closest to the invention is a settling tank, comprising a housing, a precipitating element in the form of a screw partition attached to a central pipe with holes, a sludge chamber, supply lines of purified water and removal of purified water and sludge.

A disadvantage of the known device is that in order to remove the SAR, it must be periodically turned off from work. A significant amount of water is expended in removing the precipitate. In addition, an additional device is required (wash column); .

The purpose of the invention is to increase the efficiency of the settler by continuously removing sludge.

The goal is achieved by the fact that, in the proposed construction, on the screw plane of the settler from the periphery to the central pipe at ocTpbiM angle to the direction of the water below, the spiral walls divide spiral walls, and the height of the partitions decreases: It goes with each turn of the screw, and in the upper part of the central pipe there is an additional pipeline for draining the clarified water.

The drawing shows the scheme of the sump. . , . .,. :. .; /;.:,. The thin-layer settling tank consists of a cylindrical body 1, in the upper part of which there is a pipeline 2 supplying treated water, a precipitate, a supporting element in the form of a helical partition 3 attached to the central tube 4 with openings 5 serving to receive the formed sediment. Spiral-like partitions 6 are located on the precipitation surface of the screw partition from the periphery to the center at an acute angle to the direction of the water flow. The sump contains a sludge chamber 7, a pipeline 8 for discharge of the separated sediment, pipelines 9 and 10 for drainage of clarified water that hardened purified water from the bottom 1 and the upper part of the central pipe 4, valves 11 and 12i regulating the flow of clarified water. The spiral-shaped partitions b have a height decreasing from top to bottom.

The sump works as follows.

Purified water through conduit 2 is fed to housing 1, where downward rotational-translational flow occurs. In the course of movement of the purified water, suspended solids are deposited on the screw partition 3 and the clarified water is otdrits through a pipe 9 located at the bottom of the housing 1. On the screw partition 3 sediment under the action of

the force of the t of the water and the pressure of the water begins to shrink downwards, reaching the spiral-shaped over-, towns 6 under the action of the same forces. the sediment begins to shift to the center of the settling tank and is sucked through the opening 5 into the central pipe 4. The sludge flow is ensured that part of the clarified water from the settling tank is discharged through the pipeline 10. The flow of water that is damaged through the pipeline 10 is controlled by the hydraulic size of the deposited particles, i.e . the upward flow rate in the central tube 4 is less than the deposition rate of the suspension formed. The flow rate adjustment in the pipeline / i.e.

12. The precipitate formed along the central pipe 4 is located in the sludge chamber 7, from which it is perirdically removed through the pipeline 8; -; .: -; : g ,, .., „. . ..; ::

Technical and economic advantage

the invention before the known is:; that it operates continuously and purifies more water, and also does not require additional water for washing .;

FORUMUA AND 3 ABOUT AND

Claims (2)

1. A thin-layer settling tank containing a cylindrical kopriyc, a precipitating element in the form of a helical partition attached to a central tube with holes,; located at the level of the top forming partitions, sludge chamber. the pipelines for the supply of purified water and removal of primary water and sediment are also distinguished by this. which, in order to increase sedimentation efficiency due to the continuous removal of sediment, it is equipped with spiral-shaped partitions located on the settling surface of the screw partition from the periphery to the holes of the central tube at an acute angle to the direction of water flow, the spiral-shaped partitions having a height decreasing from top to bottom. 2. The settler according to claim 1, of which is provided with an additional pipeline drainage of purified water connected to the upper part of the central pipe.