RU72970U1 - SEWAGE TREATMENT PLANT (OPTIONS) - Google Patents

Abstract

Usage: In installations for wastewater treatment at the enterprises of meat, dairy, oil refining, food, machine and instrument-making, electrical, coal industries, as well as for the treatment of livestock, municipal and surface wastewater.

Creature: The installation (Fig. 1 and Fig. 2) contains a drainage pipe 1 (a tubular mixer of wastewater and reagents), an inlet chamber 2 (a vortex flocculation chamber), a main flotation chamber 3 with a flow diverter, a pressure flotation chamber 4, a thin layer block 5 separation, the chamber 6 of the intake of recirculation water, a thin layer clarifier 7 and a tank 8 for the accumulation of purified water. In the first embodiment, the installation comprises a horizontal saturator 9. In the second embodiment, the installation contains a saturator 9 of the vertical type.

The installation also includes a sludge removal mechanism 10, a recirculation pump 11, a compressed air supply pipe 12, a defoaming pipe 13, an air-air mixture supply pipe 14, a recirculation water pipe 15, an intermediate pipe 16, a foam collector 17, a sludge removal pipe 18, a discharge pipe 19 , pipe 20 drain clean water, pipe 21 for the supply of air-water mixture.

In the first embodiment, the installation contains an ejector 22.

Shutoff valves 23-28, 31 are installed on the installation pipelines.

Pipes 29 and 30 are intended for introducing a flocculant and a coagulant into the pipeline 1 for supplying effluents for subsequent mixing with the water to be treated.

Installation for flotation wastewater treatment allows to achieve a higher degree of purification due to the presence of a mixer, a flocculation chamber, a saturator, a recirculation water intake chamber, thin-layer separation and clarification modules, a structural flotation and foam suppression system.

2 n.p. f.p.m., 2 ill.

Description

The utility model relates to water treatment technology and can be used in wastewater treatment plants at meat, dairy, oil refining, food, machine and instrument-making, electrical, coal industries, as well as for cleaning livestock, municipal and surface wastewater .

A known installation for treating wastewater [1], containing an aeration tank, an aerobic stabilizer and a centrally located secondary sump, characterized by increasing the working dose of activated sludge in the aeration tank and reducing the moisture content of stabilized sludge, it is equipped with sludge traps with drainage trays located in the aeration tank and aerobic stabilizer, installed in the trap of an aerobic stabilizer with the ability to move around a horizontal axis with an inclined shield with a hinge, as well as horizontally located in the upper her parts of the installation by a pipeline connecting the drainage tray of the aerobic stabilizer and aeration tank.

The known installation has the disadvantage of constructive complexity.

The closest in technical essence to the proposed installation is the installation for processing liquids (mainly wastewater) [2], containing the distribution unit of the source fluid, a flotation tank with a means for collecting foam and nodes supply flotation agent and foam removal, while the distribution unit of the source fluid is placed in the upper part of the flotation tank, and the installation is equipped with a foam collector and a water-jet ejector, the receiving chamber of which communicates via pipelines with the upper part of the flotation the chamber and the foam collector, the inlet nozzle of the ejector communicates via a pipeline with the bottom of the flotation tank, and the output by means of a pipeline and a pump to the supply unit of the flotation agent, while the foam collector is connected by

pipelines with a foam removal unit and the bottom of the flotation tank.

The disadvantage of this installation is the lack of effectiveness of wastewater treatment.

This drawback is eliminated in the proposed two design options for the wastewater treatment plant.

In the proposed first embodiment of a wastewater treatment plant comprising series-connected chambers, a sewage supply pipe connected to an inlet chamber, a clean water discharge pipe connected to a tank for storing purified water, a recirculation pump, a sludge removal mechanism, an ejector, a foam collector, a removal pipe sediment located in the lower part of the installation, and shut-off valves installed on the pipelines, the technical result, which consists in eliminating the above drawback closest analogue [2], is achieved by the fact that the installation contains a horizontal type saturator, as well as a sequentially located main flotation chamber with a flow separator, a pressure flotation chamber, a thin-layer separation unit, a recirculation water intake chamber and a thin-layer clarifier connected through an intermediate pipe to the storage tank pure water, while the inlet chamber is a flocculation vortex chamber and is connected to the main flotation chamber, the sewage supply pipe is a tube with a mixer of wastewater and reagents and immersed in a vortex flocculation chamber, the recirculation water intake chamber is connected through an appropriate pipe to the inlet of the recirculation pump, the outlet of which is connected through the discharge pipe to the horizontal saturator inlet, the outlet of which is connected through the air-water supply pipelines to the vortex flocculation chamber , the main flotation chamber and through the defoaming pipeline with a foam collector, moreover, to the recirculation feed pipe ode and injection line connected to the ejector associated with the air intake duct.

In the proposed second embodiment of the installation for wastewater treatment, containing sequentially connected chambers, a sewage supply pipeline,

connected to the inlet chamber, a clean water drain pipe connected to a tank for storing purified water, a recirculation pump, a sludge removal mechanism, an ejector, a foam collector, a sludge removal pipe located at the bottom of the installation, and shut-off valves installed on the pipelines, the technical result, consisting in eliminating the above drawback of the closest analogue [2], is achieved by the fact that the installation contains a vertical type saturator, as well as sequentially located main flotation a chamber with a directional baffle, a pressure flotation chamber, a thin layer separation unit, a recirculation water intake chamber and a thin layer clarifier connected through an intermediate pipe to a tank for storing clean water, and the inlet chamber is a flocculation vortex chamber and connected to the main flotation chamber, the pipeline the wastewater supply is a tubular mixer of wastewater and reagents and is immersed in a flocculent swirl chamber, the recirculation water intake chamber is connected through the corresponding pipeline with the inlet of the recirculation pump, the outlet of which is connected to the inlet of the vertical type saturator through the discharge pipe, the outlet of which is connected through the air-water mixture supply pipelines to the vortex flocculation chamber, the main flotation chamber and through the defoaming pipe with the foam collector, and the vertical type saturator is connected to the intake pipe air. The essence of the utility model is illustrated by drawings:

- figure 1 presents the first embodiment of the installation;

- figure 2 presents a second embodiment of the installation. The installation (Fig. 1 and Fig. 2) contains a drainage pipe 1 (a tubular mixer of wastewater and reagents), an inlet chamber 2 (a swirling flocculation chamber), a main flotation chamber 3 with a directional baffle (shown by a vertical line), and a pressure flotation chamber 4 , a thin layer separation unit 5, a recirculation water intake chamber 6, a thin layer clarifier 7 and a tank 8 for accumulating purified water.

In this case, the main flotation chamber 3 with a flow-separating partition, a pressure flotation chamber 4, a thin-layer separation unit 5, a recirculation water intake chamber 6, a thin-layer clarifier 7 and a tank 8 for accumulating clean water are arranged sequentially in the direction of the purified water.

In the first embodiment, the installation contains a saturator 9 horizontal type (figure 1).

In the second embodiment, the installation contains a saturator 9 of the vertical type (figure 2).

In addition, the installation includes a sludge removal mechanism 10, a recirculation pump 11, a compressed air supply pipe 12, a defoaming pipe 13, an air-air mixture supply pipe 14, a recirculation water pipe 15, an intermediate pipe 16, a foam collector 17, a sludge removal pipe 18 forcing pipeline 19, pipe 20 drain clean water, pipe 21 for the supply of air-water mixture.

In the first embodiment, the installation contains an ejector 22 (figure 1).

The installation pipelines are equipped with shut-off valves 23-28.

Pipes 29 and 30 are intended for introducing a flocculant and a coagulant into the pipeline 1 for supplying effluents for subsequent mixing with the water to be treated.

The shutoff valve 31 is installed on the pipeline between the recirculation pump 11 and the vertical saturator 9 (figure 2).

Pipeline 1 (tubular mixer of wastewater and reagents) ensures maximum contact of impurity particles with intermediate products of hydrolysis of the coagulant during perikenetic coagulation.

The flocculation vortex chamber 2 is designed to mix water during its movement from the bottom up, due to a significant decrease in the speed of movement (from 0.7 to 0.004 m / s) as a result of a sharp increase in the cross-sectional area of the chamber.

The scraper mechanism 10 is designed to remove foam and sludge, and the pipe 18 with valve 23 is for periodic removal of sludge from under block 5 and clarifier 7.

Replacing the saturator 9 horizontal type (the first option - figure 1) to a bubbler saturator 9 vertical type (second option - figure 2) with the supply of compressed air into it with a flow rate of up to 0.5 m ³ / min and pressure up to 0.8 MPa through the pipeline 12, provides the treatment of highly concentrated effluents (with suspended solids> 1000 mg / l).

The proposed installation works as follows.

To start the installation, it is necessary to fill it with process water through the pipeline 1 before the overflow of water into the tank 8 for the accumulation of purified water 8. The water level is shown in Fig. 1 and Fig. 2 by a horizontal dashed line.

Then, the recirculation pump 11 is turned on and air is supplied to the ejector 22 (Fig. 1) through the pipe 12 by opening the needle valve 28 (or, according to the second embodiment, compressed air is supplied to the saturator 9 through the pipe 12 - Fig. 2).

In the saturator 9 (Fig. 1) a pressure of 0.6 MPa (or 0.55 MPa in the saturator 9 - Fig. 2) is created using shut-off valves.

The mechanism 10 remove sludge. The purified water is supplied to the tubular mixer 1 with a residual pressure of at least 0.05 MPa, having previously connected the supply of reagents through nozzles 29, 30 to the mixer 1. The water supply for jet flotation and defoaming is turned on by opening valves 25 and 27.

The installation operates in recirculation mode with a ratio of the recirculation and purified water consumption from 1: 1 to 5: 1, depending on the degree of contamination of the wastewater and the required degree of purification.

The source (purified) water through a tubular mixer 1 enters the flocculation vortex chamber 2, into which recirculated water enters through the pipeline 21. After passage of the chamber 1, water enters the chamber 3, in which the purified water is mixed with the oversaturated air stream of recirculated water through the pipeline 14. From the chamber 3, the air-water mixture enters the pressure flotation chamber 4. Part of the water is sent to the recirculation water intake chamber 6, and part of the (purified) water is sent through the thin-layer separation unit 5 and the thin-layer clarifier 7 to the tank 8 for

the accumulation of purified water through a pipeline 16 and then discharged through a pipeline 20 for various user needs.

The water level is regulated by valve 24.

Foam formed on the surface of the water as a result of the emergence of air bubbles carrying impurities removed from the water is removed from the flocculation and flotation chamber 2 by means of the sludge removal mechanism 10 into the foam collector 17, where it is quenched by water jets (defoaming) through the defoaming line 13 and then it goes for recycling. The precipitate formed in the installation is removed through line 18 using valve 23.

The difference in the work according to the second embodiment is that the horizontal saturator 9 (Fig. 1) is replaced by a vertical 9 (Fig. 2). The supply of compressed air is carried out (from the compressor) through a pipe 12, and not using an ejector 22.

This installation for flotation wastewater treatment allows to achieve a higher degree of purification due to the presence of a mixer, a flocculation chamber, a saturator, a recirculation water intake chamber, thin-layer separation and clarification modules, a structural flotation and defoaming system.

Installation can be performed in a buried version underground.

The collected sludge and oil sludge are sent for processing to the sites of a specialized organization.

The installation case can be made of metal or fiberglass in the form of separate blocks. The installation is transportable, made in block execution, has a small mass, which facilitates its installation.

Installation is simple, reliable and long-term operation, well adapted to work in climatic conditions of central Russia.

Information sources:

1. RF patent No. 785225, M. Cl. C02F 3/12, published. 1980.

2. Copyright certificate of the USSR No. 1275002, M. Kl. C02F 1/24, published. 1986 year

Claims (2)

1. Installation for wastewater treatment, comprising series-connected chambers, a sewage supply pipe connected to an inlet chamber, a clean water discharge pipe connected to a tank for storing purified water, a recirculation pump, a sludge removal mechanism, an ejector, a foam collector, a sludge removal pipe, located at the bottom of the installation, and shut-off valves installed on the pipelines, characterized in that it contains a horizontal type saturator, as well as sequentially located main flotation a chamber with a directing baffle, a pressure flotation chamber, a thin layer separation unit, a recirculation water intake chamber and a thin layer clarifier connected through an intermediate pipe to a tank for storing clean water, while the inlet camera is a vortex flocculation chamber and connected to the main flotation chamber, the supply pipe the wastewater is a tubular mixer of wastewater and reagents and is immersed in a vortex flocculation chamber, the recirculation water intake chamber is connected through the corresponding pipeline with the inlet of the recirculation pump, the outlet of which is connected to the inlet of the horizontal type saturator through the discharge pipe, the outlet of which is connected through the air-water mixture supply pipelines to the vortex flocculation chamber, the main flotation chamber and through the defoaming pipe with the foam collector, and to the recirculation water supply and discharge pipe an ejector connected to the air intake pipe is connected to the pipeline. 2. Installation for wastewater treatment, containing sequentially connected chambers, a sewage supply pipe connected to an inlet chamber, a clean water discharge pipe connected to a tank for storing purified water, a recirculation pump, a sludge removal mechanism, a foam collector, a sludge removal pipe located in the lower part of the installation, and shut-off valves installed on the pipelines, characterized in that it contains a vertical type saturator, as well as sequentially located the main flotation chamber with about the directing baffle, pressure flotation chamber, thin-layer separation unit, recirculation water intake chamber and thin-layer clarifier connected through an intermediate pipe to the clean water storage tank, and the inlet chamber is a vortex flocculation chamber and connected to the main flotation chamber, the sewage supply pipe is a tubular mixer of wastewater and reagents and is immersed in a vortex flocculation chamber, the recirculation water intake chamber is connected through an appropriate the inlet pipe with the inlet of the recirculation pump, the outlet of which is connected to the inlet of the vertical type saturator through the discharge pipe, the outlet of which is connected through the air-water mixture supply pipelines to the flocculation vortex chamber, the main flotation chamber and through the defoaming pipe with the foam collector, the vertical type saturator connected to the intake pipe air.