SU1351624A1 - Apparatus for clarifying water - Google Patents

Abstract

The invention relates to the field of water purification and can be used in municipal and industrial water supply. The purpose of the invention is to increase the efficiency of water clarification. The device for water clarification includes a conical-shaped vortex flocculation chamber with windows for transporting sludge to a sludge compactor, a tubular sedimentation tank and filter elements (PE) arranged sequentially above the vortex chamber. The device comprises a system for applying the precoat layer on the FE consisting of an annular distribution pipe for introducing filtering powder and a distribution wall in the form of a reverse cone with mounted swirl nozzles and providing a uniform thickness of the precoat of the injected powder over the entire area of the filter elements. 1 il. i (L SL 35 2

Description

This invention relates to a water purification technique and can be used in municipal and industrial water supplies.

The purpose of the invention is to improve the efficiency of water clarification.

The drawing shows a device for clarifying water, a longitudinal section.

The device for water clarification contains a conical-shaped vortex chamber I of flocculation with rectangular-shaped windows 2 to exit the sludge from the flocculation chamber to the sludge compactor 3; 6 for introducing a suspension of filtering powder, a distribution partition in the form of an inverse cone 7 with whirlpool nozzles 8 mounted on it, a drain pipe 9 connected to the apex con Ca 7, filtering elements 10 fixed above the tube plate 11, output chamber 12 outlet nozzle 13, sludge nozzle 14 and inlet nozzle 15 installed above the tubular settling tank. The system b for introducing the filtering powder and pyFoiuero powder and distribution partition is installed in series , before the filtering elements 10 and ensure the washing of the filtering powder on the filtering elements 10,

The device works as follows.

Initially, the filtering powder is applied to the filter elements. For this purpose, a suspension of filtering powder is withdrawn into the zone of separated water by an annular distribution system. The suspension of the filtering powder passes through the distribution partition 7, the swirl nozzles 8 and enters the filtering elements 10, and the layer of particles of the injected powder is injected onto the surface of the filtering elements. The filtered fluid enters the outlet chamber 12 and through the outlet 13 is discharged into the pressure distribution network. The whirlpool nozzles 8 give the flow of fluid a rotational-translational motion, which ensures turbulent

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mode in the zone of filter elements. After the powder layer has been washed onto the filter elements 10, a device for water clarification is included.

The liquid treated with reagents through the inlet 15 enters the vortex chamber 1 flocculation, passes a tubular sump, a chamber 5 of stationary water, a distribution wall 7, swirl nozzles 8, filtering elements 10 with a powder layer, an outlet chamber 12, an outlet 13 and enters the pressure distribution network. The contaminants deposited in the tubular clarifier slide into the flocculation chamber 1 and through the sludge holes 2 enter the sludge collector 3. As the sludge accumulates in the sludge collector it is discharged through the nozzle 14 into the sewage system. Pollution not settled in the tubular sediment trap is trapped by filter elements. As a result, the resistance of the filter elements during installation operation increases. In order to reduce the growth of the resistance value of the filtering powder layer, the powder is fed with a suspension powder, which is introduced through the annular distribution system 6 continuously during the operation of the installation. Upon reaching the maximum pressure drop, the unit is shut down and flushing is performed. Rinsing is carried out by reverse flow of water. Wash water is supplied to the plant through the outlet 13, passes the outlet chamber 12 and alluvial filters 10, the powder layer is separated by a reverse flow of water from the filter element, collected by a conical partition wall 7 and enters the wash tank where the contaminated powder is washed . Simultaneously with the washing of the filter elements 10 carried out -. The washing of the sludge collector 3. For this, the water supplied to the installation through the inlet 15 passes through the flocculation chamber 1, the sludge holes 2, the sludge collector 3 and is discharged through the nozzle 14 together with the sludge. the installation is operational.

The proposed solution provides a turbulent motion of the fluid in the zone of filter elements, and therefore, an even thickness of the precoat layer of the injected powder over the entire area of the filter elements, which increases the efficiency of clarification. In addition, after washing, the throughput of the filter elements is fully restored and the growth rate of their resistance decreases, resulting in a prolonged filter cycle of the device.

Claims (1)

Invention Formula A device for clarifying water containing a float chamber. a tubular settling tank located above the vortex chamber, a sludge trap and a water supply and drainage filtrate system, characterized in that, in order to improve the efficiency of water clarification, it is equipped with filter elements installed above the tubular clarifier an annular distribution system for introducing a suspension of filtering powder and distribution partition in the form of a reverse cone with whirlpool nozzles mounted on it and a drain pipe connected to the top of the cone. Editor A. Ogar Compiled by T, Ledneva Tehred I. Veres Order 5515/5 Circulation 657 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader A. T sko