SU893892A1 - Unit for waste liquid purification - Google Patents

Description

one

The invention relates to installations for the treatment of waste liquids and can be used in the technique of cleaning household and industrial waste liquids.

A known installation for cleaning waste liquid, comprising a housing within which a filter and an aerated column D are placed.

The disadvantage of this installation is that the recirculation of the waste liquid is carried out by a pump on the discharge line of which an ejector is installed for aeration, which complicates the installation and requires additional energy consumption. In addition, the preliminary cleaning of the waste liquid is carried out by a special device.

The purpose of the invention is to intensify the cleaning process for providing directional recirculation of the sludge mixture.

To achieve this goal, the aerated column in the lower part is open and limited by a shell; the filter is installed directly under the open part of the column coaxially to the body with the formation of a sand trap between the bottom of the filter and the camera body, and the installation is equipped with a flow stabilizer located coaxially with the filter to form

to an annular chamber for collecting the purified liquid, and made in the form of two successively installed cylinders connected by a bellows, while the lower cylinder is fixed 15 and its inlet section is located in the sand trap chamber, and the upper cylinder is rigidly fixed on the filter cover with the possibility of reciprocating movement in the vertical plane during the regeneration process.

Claims (2)

In addition, the upper cylinder of the flow stabilizer is provided with an additional cylindrical shell installed coaxially inside it, and the aerated column is equipped with a disk aerator, the latter and the additional cylindrical shell fixed on the truss. The drawing shows the installation design. The installation includes a housing 1, an aerated column 2 installed inside it with an open bottom part bounded by a shell 3, a filter mounted on supports 5 directly under the open suit of column 2 to form a sand trap chamber 6. The installation has a flow stabilizer located coaxially to filter 4 to form annular chamber 7. The flow stabilizer is made in the form of two cylinders 8 and 9 connected in series, interconnected by a bellows 10, the lower cylinder 8 is fixed and its inlet section is It is laid in the sand trap chamber 6, and the upper one is rigidly fixed on the filter cover 11, 4 with the possibility of reciprocating motion. The aerated column 2 is equipped with a disk aerator 12 with a drive 13 fixed on the farm I, which is mounted on the pontoon 15 with guiding rods 1b and stroke 17 stops. The upper cylinder 9 of the flow stabilizer is equipped with an additional cylinder 18 installed inside it coaxially and also fixed on farm 1 with pipelines 19 for supplying waste liquid, 20 for removing cleaned liquid, 21 for unloading sand from the filter chamber for dogs, 22 for unloading and 23 for loading filter material. The installation works as follows. Through the Tpyf pipeline. 19, the liquid enters the sand trap chamber 6 where it is freed from suspended mineral matter, after which the flow stabilizer and an additional 18 are pumped through the cylinders 8 and 9 of the flow stabilizer 12 into the aerated column 2. In the aerated column 2, the waste liquid is biologically cleaned by microorganisms of activated sludge, and then the recirculated sludge mixture, by bending the shell 3, enters the annular gap formed by the housing 1 and the outer cylinder of the filter, where 24 is moving at a certain speed. The silt mixture is filtered through the specified filter and enters the annular chamber 7, from where it is removed from the system through a pipe 20 for draining the purified liquid, while the activated sludge trapped on the surface of the filter t is washed off by the directional flow and through the cylinders 8 and 9 of the flow stabilizer and the additional cylinder 18 together with the waste liquid being cleaned, is pumped by the aerator 12. Aerator 12 is driven by a drive 13. an increase in filter resistance c. During the operation, the water level in the aerated column 2 increases, while the aerator 12 rises along with the fluid for the estimates of the movement of the pontoon 15 along the guides 16 within the stroke limiter 17. Regeneration of the filter 4 is carried out periodically with a reverse current, in which the filter cover 11 is lifted and the filter material is loosened, which improves the release of sand from foreign matter retained during the filtration of the sludge mixture. Removal of the mixture of mechanical impurities formed during the regeneration process and delivered with waste liquid is carried out through pipe 21. The filter is loaded through pipe 23, and unloading through pipe 22. The technical and economic advantages of the installation are as follows. The use of the installation intensifies the process of gravitational sedimentation and washing of sand, as well as biological treatment of waste liquid by 1.5-1.7 times by combining the sand trap zone, aeration and filtration zones, as well as increasing the dose of active force in the aerated column; allows you to exclude from the treatment plant a special device for pretreatment of waste liquid, pump for recirculation of water and. an ejector for aeration, to reduce electricity consumption by 15-20%, and also reduces capital investment by 10-15. Claim 1. Wastewater treatment plant, comprising a housing, inside which contains a filter and an aerated column "characterized in that, in order to intensify the cleaning process by providing directional recirculation of the sludge mixture, the aerated column is installed in the upper part of the body above the filter and the unit is provided with a sand trap placed between the filter and the bottom of the case, as well as a flow stabilizer made of two cylinders arranged axially one above the other with a bellows between them, while the lower cylinder is fixed by its base in the sand trap chamber, and 938924 the upper cylinder is mounted for vertical reciprocating movement in the upper part of the filter. S 2. Installation in accordance with claim 1, 1, 2, 2, 5, 5, and 6), which is equipped with a disk aerator placed above the flow stabilizer and a cylindrical shell attached to the truss located inside the upper cylinder of the flow stabilizer. Sources of information taken into account in the examination (5 1. U.S. Patent No. 3,956,128, Incl. 210150, 1976. Stack Cluster "