SU762921A1 - Plant for purifying water from suspended particles and phytoplankton - Google Patents

Description

The invention relates to a technique of water purification from suspended substances. and phytoplankton.

A microfilter for water purification from mechanical impurities and plankton, made in the form of a rotating drum, the surface of which is covered with a microgrid or formed by filtering elements, is known [1].

A microfilter is usually installed in reinforced concrete chambers with spillway to maintain a constant water level, with the upper part of the drum located above the water level in the chamber. Microfilters have modifications that differ in the water supply and drainage system, the profile of filter elements or the type of grids, their fastening and the method of washing.

A disadvantage of the known microfilter is the low efficiency of water purification. 25

The closest to the invention in technical essence and the achieved result is a microfilter, including a rotating drum with a filter device installed on it.

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system, supply and drainage of the clarified and wash water [2].

A disadvantage of the known device is the low efficiency of water purification with varying degree of dispersity of contaminants.

The purpose of the invention is to improve the quality of water purification with varying degrees of dispersion of contamination by combining bulk filtration through a floating filter loading and microprotesin through the mesh.

This is achieved by the fact that the filtering device is made in the form of two concentrically arranged floating tiers of different sizes, enclosed in synthetic fiber nets, the inner one of which is filled with larger size loading, while the grid cells are made decreasing in the direction of filtering.

It is advisable to provide the installation with a perforated tube installed concentrically to the flushing water removal system.

The drawing shows a general view of the installation.

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762921

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The water treatment plant is placed in a reinforced concrete chamber 1 and is made in the form of a rotating drum with a two-layer filter load of light filter material, for example, foamed polystyrene. The inner layer 2 is filled with a coarse granular load, and the outer layer 3 is filled with a fine granular one.

The loading layers are enclosed in grids 4,5, 6 of synthetic fiber, for example, nylon, and the mesh size of the mesh 4 is smaller than the mesh of mesh 5, the cells of which are smaller than the mesh of mesh 6.

At the end of the drum there is a distribution pocket (not shown), and along the axis of the drum there is a perforated tube 7 for supplying the source liquid, which is concentric with tube 8, ’servant for draining the washing water, which is also the shaft of rotation of the installation.

The pipe 8 is connected to the tray 9, placed along the axis of the drum and serving to collect the wash water.

In the upper part of the installation, located above the water level in the chamber, is placed a washer 10 distributing water along the length of the drum. ⁷

Holes with nozzles 11 and 12 are also provided in the grids, which are blocked by plugs and intended for pumping and discharging floating loading granules, respectively, into the outer and inner layers.

The injection is carried out at the lower position of the pipes 11 and 12, the release at the top.

The source water from the distribution pocket enters the perforated pipe 7 and through the holes in the pipe is directed into the internal cavity of the rotating filter drum. Water is first filtered through the inner layer 2, filled with a large granular load, and then through the outer layer 3, filled with a fine granular load, while passing through the filtering grids 6, 5, 4, which contain the mesh.

Purified water is collected in chamber 1 and discharged to consumers.

• The washing of the filtering medium is periodically carried out in the opposite direction to filtration with clean water from the washer 10, which ensures its even distribution over the surface of the filter. Wash water is collected in tray 9 and up to pipe 8 is discharged into the sewer.

The design of the water treatment plant provides a process that combines bulk filtration through

floating filter loading with diminishing grain size and microprotection through synthetic fiber grids with successive reduction of cells in the direction of filtration. This combination allows to increase the installation’s dirt-holding capacity and dramatically improve the quality of water purification. In addition, due to the replacement of filter elements with a floating filter charge and metal grids with synthetic fiber nets, the weight of the structure is reduced, and therefore the motor power required to rotate the installation.

The proposed design also allows you to change the particle size of the filter loading, layers, depending on the degree of dispersion of impurities and the nature of the source water contamination. At the same time, the process of loading and releasing pellets is simpler, less time consuming and less labor intensive than replacing filter grids or grids.

Claims (2)

Claim 1-Installation for the purification of water from suspended particles and phytoplankton, including _{: a} rotating drum with a filtering device installed on it, a system for supplying and discharging the clarified and washing water, which is In order to improve the quality of water purification with varying degrees of dispersion of contaminants by combining volumetric filtration through a floating filter loading and microprocessing through grids, the filtering device is made in the form of two concentrically arranged tiers of floating loading NOSTA enclosed in the mesh of synthetic fibers, the inner of which is filled with coarser loading, the cell grids made decreasing in the direction of filtration. 2. Installation by π. 1, which is equipped with a perforated tube mounted concentrically with the washing water removal system.