SU1555294A1 - Device for treatment of waste water - Google Patents

Abstract

The invention relates to wastewater treatment plants with a high concentration of suspended floating particles, as well as earth, sand, it can be used for wastewater treatment of plants for recycling polyethylene film, potato processing. The aim of the invention is to increase the productivity due to the intensification of the sedimentation process. The device comprises a cylindrical body, inside of which there is a partition not reaching the bottom, made in the form of a downward-facing diffuser with a taper angle of 6-12 °, dividing the case into a settling and receiving chambers. The receiving chamber is provided with a mesh container located below one another, an inclined perforated partition, an air duct with openings directed toward the perforated partition, as well as a supply pipe, an annular tray for draining the clarified liquid and a drain branch pipe. The bottom of the mesh container is made with a slope, at the lower point of which there is a tray for draining floating substances. 1 il.

Description

The invention relates to wastewater treatment plants with a high concentration of suspended floating particles, as well as earth, sand, and can be used to treat wastewater from polyethylene film recycling and potato processing industries.

The aim of the invention is to increase the productivity due to the intensification of the sedimentation process.

The drawing shows a device for wastewater treatment, vertical section.

The device includes a cylindrical body 1 with a bottom 2, equipped with a supply pipe 3, an annular tray 4 for draining the clarified liquid, a waterproof manhole 5, pipelines 6 and 7 for draining the clarified water and sludge, respectively. An eccentrically located semi-submersible partition 8 in the form of a downward facing diffuser with a taper angle of 6–12 ° divides the settling tank into the receiving 9 and settling 10 chambers. Inside the receiving chamber 9 a mesh container 11 is installed with an inclined bottom 12, at the lower point of which under the same

the angle is the tray 13 for diverting floating substances; the slope of the bottom 12 of the container 1-1 is made at an angle sufficient to spontaneously empty the container 11 after opening the hatch 5, and is selected depending on the degree of fluidity of the dehydrated particles.

The mesh container 11 supports an inclined perforated partition 14 forming a flow stabilization chamber 15 with the side walls of the partition 8 along its entire height. Under the partition 14, a duct 16 is installed with openings 17 directed toward the perforated partition 14. The housing is provided with a drainage fitting 18 located below the level of tray 13.

The device works as follows.

Sewage water through the supply pipe-3 is supplied to a mesh container 11 located in the receiving chamber 9, where the accumulation of floating particles in the waste water occurs. The particles trapped in the container 11, installed in the receiving chamber 9, are intensively sparged with air which is supplied from the duct 16 located under the perforated partition 14t through the openings 17, which causes strong mixing of water in the container 11, resulting in particles floating substances are cleaned of adhering contaminants: freed from floating. Particles of sewage water, but contaminated with settling solid particles, passes through the perforated side walls of the container 11, the perforated partition 14 and enters the flow stabilization chamber 15. An eccentric located not reaching the bottom of the septum 8, made in the form of a downward facing diffuser with a taper angle of 6-12, ensures uniform flow distribution in the settling chamber 10. This causes precipitation of particles that accumulate in the taper bottom 2 and are periodically removed pipeline 7.

The purified water enters the overflow water collection tray 4, from where it is discharged through line 6 from the device.

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After the net container 11 is filled with the washed floating particles, the supply line 3 closes and the drain connection 18 opens. The device is slowly emptied and the washed particles are simultaneously dehydrated. After emptying the device, the hatch 5 is opened and the dehydrated particles of floating substances on the inclined bottom 12 of the container and the tray 13 located at the same angle are removed from the device. The washed particles are transferred to production for processing.

Thus, the implementation of the partition in the form of a downward-facing diffuser with a claimed taper angle provides for the downward flow of water an even decrease in speed to the value at which intensive precipitation of settling solid particles occurs in the sediment. There is no flow separation from the walls of the diffuser, which intensifies the clarification of water.

The location of the partition, which does not reach the bottom, and the perforation of the container along its entire height increases the useful area of the container walls through which water is filtered, which increases productivity.

The implementation of an inclined bottom mesh container provides for the removal of the delayed floating particles without removing the container from the housing, which increases the useful operation time of the device.

Claims (1)

Invention Formula A wastewater treatment device that includes a cylindrical body, inside which there is a semi-submersible partition not reaching the bottom, dividing it into a settling chamber and a receiving chamber equipped with a mesh container perforated by a partition located below the other, with an air duct with holes directed toward the perforated baffles, as well as a supply pipe, an annular tray for removal of the clarified liquid and a drain pipe, characterized in that, in order to improve the performance wa due to the intensification of the process or a slurry is deposited, not income to the bottom conductive pe5P55294 The partition is mounted eccentrically with the mesh container relative to the body and is made with a slope, in the lower part of which a downward facing diffuser with a tray is arranged for deflecting from a float to an angle of taper of 6-12 °, while the bottom materials. 75