SU1738306A1 - Filter for removing mechanical impurities from natural water and sewage - Google Patents

Abstract

The invention will simplify the design and improve the efficiency of the filter. The invention relates to the field of natural and wastewater treatment and can be used in public utilities and other industries. The goal is to simplify the design and increase the efficiency of the filter. The filter for purification of natural and waste waters from mechanical impurities contains a tank divided by a partition, along which the device for its purification is located. The cleaned fluid (coolant) enters the reservoir through a pipeline to inject the fluid. Mechanical impurities that are retained by the septum accumulate at the bottom of the tank near the septum. The coolant is led out of the reservoir through the discharge pipe of the fluid to be cleaned. As the hydraulic resistance of the partition increases, the fluid level (SL) in front of the partition increases. With a certain VL in front of the partition, which is slightly higher than the height at which the horizontal part of the L-shaped pipe is located, a draft flows through it. The precipitate is fed to the dehydration, and the purified filter continues to work. 2 hp f-ly, 2 ill. (Ls

Description

The invention relates to the purification of natural and waste waters and can be used in public utilities, as well as in the chemical, food and other industries.

A filter for the purification of natural and waste waters is known, comprising a reservoir with pipelines for inlet and outlet of a liquid and a filter partition separating them;

The disadvantages of the filter are the design complexity associated with the use of a special device for removing retained impurities by washing, as well as low efficiency,

due to the need to stop the filter operation during the flushing period.

The closest solution to the technical essence and the achieved result is a filter for sewage treatment from mechanical impurities, containing a reservoir, in the opposite walls of which there are pipelines for liquid inlet and outlet, a filter septum, the upper edge of which is located below the upper edge of the reservoir, and a device for removal of impurities retained by the septum. The device includes a pump that pumps out a sediment accumulating at the partition wall and an opening

00

W

about

g “v”

in the wall of the reservoir at the bottom and the partition, which periodically opens for flushing with a stream of liquid, heavier impurities. In addition, the device contains a scraper that performs a vertically-progressive motion along a partition.

A disadvantage of the known filter is the design complexity and low efficiency associated with the need to adjust the pump flow rate, the frequency and the duration of the opening, depending on the contamination of the fluid and the filter capacity. In the event of a discrepancy between the indicated values during the operation, either an overflow of the crude liquid through the edge of the partition wall or a part of the incoming crude liquid with the sediment may occur.

The aim of the invention is to simplify the design and increase the efficiency of the filter.

This goal is achieved by the fact that in the filter containing the tank, in the opposite walls of which there are pipelines for liquid inlet and outlet, a filter septum, the upper edge of which is located below the upper edge of the tank, and a device for removing impurities retained by the partition. the bottom of the tank along the partition from the pipeline to enter the liquid perforated pipe, plugged at one end, and the other end connected to the L-shaped pipe, free end of which is placed in the tank wall below the upper edge of the partitions.

In order to increase the hydraulic resistance of the walls of the perforated pipe, it is advisable to perform its openings with an increasing step in the flow of the outgoing fluid. In addition, the perforated tube may be provided with perforated perpendicular tubes, which adjoin the perforated side with the partition wall.

FIG. 1 shows a filter; cross section; in fig. 2 - the same, longitudinal section.

The filter consists of a reservoir 1, pipelines input 2 and output 3 of the liquid. At the bottom of the tank along the partition 4. the upper edge of which is located below the upper edge of the tank, on the side of the pipeline 2 a perforated pipe 5 is laid, plugged at one end, and the other is connected to an L-shaped pipe 6, the free end of which is placed in the wall of the tank at the lower upper edge partitions 4.

The openings of the pipe 5 are made with increasing step on the flow of

fluid. The perforated tube 5 is provided with perforated perpendicular tubes 7 perpendicular thereto, in contact with the perforated side 8 with the partition 4.

The filter works as follows. Fluid enters reservoir 1 through conduit 2. Mechanical impurities delayed by partition 4 accumulate mainly at the bottom of reservoir 1 near partition 4. Purified liquid is withdrawn from reservoir 1 through conduit 3. As the hydraulic resistance of partition 4 increases, due to accumulation of delayed impurities, level

fluid before the septum 4 increases. At a certain level, slightly exceeding the height at which the free end of the L-shaped pipe is located, there is a flow of sediment through it, entering under the action of hydrostatic pressure through the openings of pipe 5 and perforated pipes 7, which contact the perforated side with the partition

The precipitate is fed to the dehydration, and the purified filter continues to work.

The use of a device for removing retained impurities makes it possible to eliminate the use of a pump, periodically

openable hole and scraper, which simplifies the design of the filter.

The device cleans the filter at a certain degree of contamination, which excludes the possibility of overflow of the crude liquid through the edge of the partition or removal of a significant part of the incoming crude liquid with the sediment and increases the filter efficiency.

Perforation of the perforated tube with increasing step downstream of the liquid and the presence of perforated tubes perpendicular to the tube in contact with the perforated side with the partition increases the filter efficiency, as it ensures that the sediment deposited near and on the partition is removed from the filter rather than liquid entering the filter.

Claims (3)

Claims 1. Filter for cleaning; sewage from mechanical impurities containing a reservoir in npo-vs; put the walls of which have pipelines for liquid inlet and outlet, a filter septum, the upper edge of which is placed below the upper edge of the tank, and a device for removing impurities retained by the partition, characterized in that, in order to simplify the design and increase the filter efficiency, the device for removing impurities is made view of the reservoir laid on the bottom along the partition from the side of the pipeline for introducing the fluid of the perforated pipe plugged at one end and connected to the other end 0 L-shaped tube, the free end of which is placed in the wall of the tank below the upper edge of the partition. 2. A filter according to claim 1, characterized in that, in order to increase the hydraulic resistance of the walls of the perforated pipe, its openings are made with increasing step along the flow of the exiting Liquid. 3. The filter according to claim 1, characterized in that the perforated pipe is provided with perforated perpendicular pipes in contact with the perforated side of the partition, 7