SU1361117A1 - Settler - Google Patents

Abstract

The invention relates to wastewater treatment and can be used for treating municipal and industrial wastewater. The aim of the invention is to ensure the removal of supernatant in the central zone of the settler. The sump contains a guide cylindrical screen 12, made hollow and open in the upper part, connected to the accumulator 24 accumulated substances with a reservoir and equipped with a float of constant volume 15 at the top h / 1 chi, and with a variable volume float-aerator 16 at the bottom filter cloth. The height of the outer wall 13 of the screen is greater than the height of the inner wall 14. The cylindrical screen 12 is held in a floating position by two annular floats: the upper 15 of a constant volume and the lower 16 of a variable volume. The bottom float is made of soft filter cloth and is at the same time aerai (/) (U) 05

Description

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the torus, to it through the pipeline 17 is supplied squeezed air. Sewage enters the volume bounded by the guiding screen 12, which is in the floating position due to the lifting force of the floats 15 and 16. The water, aerated, enters the settling tank from under the bottom edge of the screen 12. From the float-aerator 16, they are vigorously released from the water and accumulate on the surface inside the screen. In order to remove the accumulated substances inside the screen, the flow of air into the float-aerator 16 is stopped. The aerator float 16 is compressed under hydrostatic pressure of water. Screen 12 is immersed so that the top

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The invention relates to the field of wastewater treatment, more specifically to devices for mechanical treatment of wastewater from floating impurities and can be used to treat municipal and industrial wastewater.

The purpose of the invention is to increase the efficiency of wastewater treatment by ensuring the removal of surfaced substances in the central zone of the sump.

The drawing shows a sump, longitudinal section.

The sump consists of a cylindrical body, - 1 with a conical bottom and attachment 2 for collecting sediment. A scraper 3 is attached inside the settler and attached by rods (not shown) to the rotating farm 4. The inner ends of the wings of the scraper are joined by a rotating ring 5 supported on the fixed ring 6 fixed to the central support 7 of the truss or the scraper ba

Sewage water is supplied to the sump via pipeline 8, passes through windows 9 in the central support, drains through overflow tray 10 and outlet pipe 11. Distribution

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the edge of the inner wall 14 remains below the water level, and the upper edge of the wall 13 is above the level. The supernatants, together with the water, are drained into the screen cavity and through pipelines 20 and 21 enter the reservoir 24, from where they are removed through the pipe 25, After the end of the collection of the melt; The air supply to the lower float is restored, its volume is restored, the screen 12 pops up and the flow of the surfaced substances from the central zone of the sump stops. The proposed settling tank allows to improve the operating conditions, increase the efficiency of removing floating up substances from the central zone, reduce the load on the farm 4. 1 sludge

the water in the sump is produced by means of a guide cylindrical screen 12, which is hollow and open at the top. The height of the outer wall 13 of the screen is greater than the height of the inner wall 14 ". The cylindrical screen is held afloat by two annular floats: the upper 15 constant and the lower 16 variable volumes.

The bottom float 16 is made of soft filter cloth and is also an aerator. Compressed air is supplied to it through flexible 17 and rigid 18 pipelines. I

The guides 19 allow vertical movement of the cylindrical screen and fix its position in the radial direction.

Flexible pipes 20 and rigid pipes 21 serve to remove floating materials from the central zone of the settler. To remove the substances that floated in. the peripheral zone of the sedimentation tank; the receiver 22 of the accumulator and the pipeline 23; serve. The removed supernatant flows into the accumulator 24. The pipeline 25 serves to remove these substances from the accumulator 24.

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The precipitate deposited by the sludge scraper 3 is shifted to at 2, from where it is removed through pipe 26,

The sump works as follows

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Sewage water through the pipeline 8 through the receiving openings 9 enters the volume bounded by the guide screen 12 held in the floating position due to the lifting force of two floats - the upper 15 and the lower 16.

Water subjected to aeration from the lower edge of the guide screen 12 enters the settling tank, is clarified, collected by the overflow tray 10 and discharged through pipeline 11

The supernatant substances, picked up by the air stream leaving the float-aerator 16, are vigorously released from the water and accumulate on the surface inside the guide screen. In order to remove the substances accumulated inside the cylindrical screen 12, the air supply to the float-aerator 16 is stopped, the filter cloth of the float 16 is compressed under hydrostatic pressure of water and the screen 12 is submerged so that the upper edge of the inner wall 14 is below the water level and the upper edge of the outer wall 13 remains above level

Populated substances are poured into the cavity of screen 12 together with water and removed via flexible 20 and hard 21 pipelines to accumulator 24. After that, the air supply to the lower float 16 is resumed, its volume is restored, screen 12 floats up and the flow of supernatant substances from the central zone of the sump into the cavity of the screen and the drive 24 stops. Substances that surface in ne

Editor A.Shishkin Order 6191/26

Compiled by G. Meshi Tehred M. Didyk

Corrector

Circulation 851 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Production and printing company, Uzhgorod, Projecto st., 4

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The receiver part, through receiver 22, also enters the tank, from where it is removed via conduit 25. Since the float-aerator 16 is raised above the bottom of the settler, it is not filled with sand, which facilitates the operating conditions.

The load from the guide screen 12 is perceived by the floats 15 and 16, which makes it easier to farm 4.

The use of the invention will make it possible to increase the removal efficiency of supernatant substances in the central trade zone of the settler, to improve the operating conditions, to reduce the load on the scraper farm and to reduce its metal consumption. bone..

Claims (1)

Invention Formula A sump containing a cylindrical body with an overflow tray and sediment collecting device, located inside the receiver of an accumulator of emerging substances and guiding a cylindrical screen, aerator, scraper, supply and discharge pipelines, characterized in that, in order to increase the effluent drainage efficiency due to the removal of supernatants in the central zone of the settler, the cylindrical screen is made hollow and open in the upper part, communicated by pipeline with the accumulator of supernatant substances and provided with with a float of constant volume in the upper part, while the aerator is made in the form of pop-variable volume, made of flexible filtering fabric, and is installed in the lower part of the cylindrical screen. Proofreader L. Patay