SU1611872A1 - Apparatus for treating waste water - Google Patents

Abstract

The invention relates to wastewater treatment technology and can be used in bio-cleaning stations for domestic and industrial waters, in microbiological, chemical, and oil refining industries, as well as in a biosystem for waste gas treatment. The purpose of the invention is to increase the degree of wastewater treatment. The device consists of a flotation chamber, a sewage supply pipe, a perforated pipe for feeding a working agent covered with an elastic porous casing, a foam trap placed in the upper part of the flotation chamber, a chamber for draining the clarified liquid. The invention improves the degree of wastewater treatment by placing the pipe for supplying wastewater in the lower part of the flotation chamber, making it in the form of a spiral, which is perforated in the lower part and aligned with the perforated pipe for supplying the working agent (air), also made in the form of a spiral. . In addition, the foam trap is made of separate trays that are fitted with constant pitch on the pipes for foam suction and placed over the entire surface of the flotation chamber with the ability to move in the upper part, the partition is equipped with two sumps located in the flotation chamber, one of which is located under the foam trap and another above the pipes for the supply of waste water and air. 1 tab., 4 Il.

Description

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The invention relates to wastewater treatment technology and can be used in bio-cleaning stations for domestic and industrial waters, in microbiological, chemical, and oil refining industries, as well as in a biosystem for purifying waste gas.

The purpose of the invention is to increase the degree of wastewater treatment.

FIG. 1 shows a device, a longitudinal section; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. one; in fig. 4 - section BB on. Fig, 3.

The wastewater treatment device comprises a housing 1 and pipes 2 and 3 for supplying waste water and air. The air supply pipe is covered with a porous elastic sheath. The foam trap consists of separate lots: COB 4, mounted on a constant pitch: on pipe 5 for foam removal, connected with corrugated rubber

pipe 6 and pipe 7 for removal ne; us On the partition 8, in the lower part, there is a bump 9, overflow 10 and a nozzle 11 for draining clarified water.

; In the device there are combined I spiral perforated pipes 12 I and 13 for supplying waste water and air. The housing is divided into flotation and clarification chambers 14 and 15. A baffle plate 16 is placed on the top of the partition wall. A trap separator consisting of separate trays 4 mounted on pipes 5 for foam removal is made of lightweight material. move to the top of the camera.

The device works as follows.

Sewage water is supplied through the boom 2 by a spiral perforated I pipe 12 into the flotation chamber 14, and I is fed through a branch pipe 3 through a spiral perforated pipe 13 covered with a porous elastic sheath. In this case, the waste water and dispersed air are evenly distributed over the entire area of the flotation chamber i, which increases the probability of the particles coming into contact with the bubbles, air, and the particles adhere to the air bubbles. Formed flotation complex floats up, creating a foam. The uniform distribution of wastewater and dispersed air creates the possibility of a minimum number of bubble collisions. This creates an optimal hydrodynamic regime, i.e. bubbles of the same size rise at the same rate.

The foam formed is drained evenly over the entire surface of the flotation cell. The foam then passes through the foam removal pipe 5 and is removed to the outside through the pipe 7. The foam removal pipe 5 is connected to the pipe 7 through a corrugated rubber pipe 6, which allows the foam trap to move vertically when the liquid level in the flotation chamber changes, which allows cannot remove the foam.

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The clarified liquid passes through the overflow 10 into the clarification chamber 15, the Bumper 16, located under the sealer in the flotation chamber, prevents foam from entering the clarified fluid, and the bumping device 9, located above the pipes, prevents the flotation of particles and air bubbles from passing through spread aeration flow.

Purified wastewater containing suspended solids with a concentration of 3-5 g / l and air (specific air flow rate of 3-5 l / kg) is supplied, respectively, through spiral perforated pipes for supplying waste water and air, which are combined, into the flotation chamber . At the same time, the formed flotation complex floats up to the surface and with the help of a foam catcher is removed through the branch pipe for the removal of foam; The clarified liquid from the flotation cell passes through the gap into the clarification chamber.

Wastewater treatment tests are carried out with decreasing fluid levels. The initial liquid level is 1.5 m (table).

PRI me R 1. The sewage treatment apparatus is tested under laboratory conditions. The airborne mixture is fed to a perforated pipe covered with a porous elastic sheath in the lower part of the flotation chamber, and the waste water is supplied from the upper part of the chamber through a nozzle. The foam formed is removed through the side port at the top of the chamber. The clarified liquid is discharged into the clarification chamber. The degree of wastewater treatment is low (90-94%).

Example 2. Sewage water is supplied to a spiral perforated pipe located at the bottom of the flotation chamber, and air is fed to a spiral perforated pipe covered with a porous elastic sheath combined in the form of a spiral with a pipe for supplying waste water. The foam formed is removed by a foaming agent consisting of separate trays, which are mounted with constant pitch on the pipes for the removal of foam and located across the entire surface of the chamber, flotation with the possibility of movement in the upper part of this chamber. The clarified fluid is discharged in camem5.

brightening. At the same time, the wastewater under the pipes penetrates the air bubbles and the particles adhere to the bubbles, as a result of which their contact increases, and the supply of wastewater in the lower part of the flotation chamber increases the transport of flotation complexes. With the help of a foam trap, continuous removal of foam is created over the entire surface of the flotation chamber and when the liquid level in it changes. Due to all this, an increased degree of wastewater treatment has been achieved (97.5-98%).

The use of the proposed device for sewage treatment at the stations of biological purification of domestic and industrial waters, in the microbiological, chemical industry in the biosystem of the purification of exhaust gases makes it possible to increase the degree of sewage treatment to 97.5-98% by adjusting the amount of air and the size of bubbles , as well as the wastewater flow rate, the ratio of wastewater to air flow rates, significantly reduce capital and operating costs compared with the known device. These advantages are achieved due to the fact that, firstly, an additional device for the water-air mixture is not required, with which the pressure of the water-air mixture decreases outside the structure. This leads to the premature enlarging of air bubbles, which reduces the degree of wastewater treatment, and secondly,

Supply conditions for working agent and wastewater

Water air supply

mixtures

into a perforated pipe, waste water - from the upper part of the chamber through a pipe (a known device)

Supply of waste water and air in various perforation of the pipe, combined in the form of a spiral. Foam is removed with a foam catcher.

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scraper conveyors are required,

 which complicate the app design.

war and, thirdly, foam, particles and air bubbles were prevented from entering the clarified liquid by two chippers.

Claims (1)

Invention Formula A sewage treatment unit containing a flotation chamber, a sewage supply pipe, a perforated pipe for supplying a working agent, an elastic porous casing, a foam trap placed in the upper part of the flotation chamber, a chamber for clarified liquid separated by a partition from the flotation chamber differing Essentially, in order to increase the degree of wastewater treatment, the wastewater supply pipe is placed in the lower part of the flotation chamber, made in the form of a spiral, perforated in the lower part, and combined with the perforated pipe for supplying the working agent — air, also in the form of a spiral, while the foam trap is made of separate trays mounted on a pipe with a constant step onto the foam pipes placed across the entire surface of the flotation chamber with the possibility of moving in the upper part, the partition wall is equipped with two chippers, located in the flotation cell, one of which is located under the foam collector and the other above the pipes for the supply of waste water and air. 3000-5000 200-300 1,5-0,75 90-94 3000-5000 80-100 1.5-0.76 97.7-98 /four / 7 L  G- r -7. (.   j y L / X „  ui 17 о о о о о о о о о о «о о о о  -y FIG. 7 P FIG. 2 15 -in 16 ten t 61 15 12 u p Aa FIG. J Fy