RU119633U1 - DEVICE FOR THE COLLECTION AND CLEANING OF DRAIN WATER - Google Patents

Abstract

A device for collecting and purifying drainage water, including a container with a cylindrical body and a conical bottom, elements for supplying and removing water and removing contaminants, a water flow distributor, characterized in that the body of the container is divided by a partition into a cell with clean water and a cell with contaminated water, when In this case, the partition is not made to the entire height of the container to ensure that water can flow from the cell with contaminated water into the cell with clean water, while in the upper part of the cell with contaminated water there is a damper made in the form of a sheet with holes and an expander, which is connected to one sides with water inlet elements, and on the other side with a water flow distributor located along the vertical axis of the device in the direction of the polluted water flow.

Description

The utility model relates to the field of purification of process water from undissolved impurities and can be used in the operation of nuclear power plants (hereinafter - NPPs).

During operation of a nuclear power plant, solid, liquid and gaseous radioactive wastes and media are generated that are sources of ionizing radiation. To eliminate their detrimental effect on the environment during the construction of nuclear power plants, a special water treatment system is included, which includes a drainage treatment plant designed to treat drainage water from mechanical impurities, radionuclides, and salts in order to return the distillate to the process.

Floor drains include unorganized leaks of the first circuit (leaks of technological equipment on the floor of industrial premises); water decontamination equipment and walls; laboratory discharges; domestic wastewater of filters for special water treatment systems.

A device for cleaning liquid, including a vertical tank that allows you to clean the liquid by sedimentation (see Yakovlev SV and other "Sewerage", Moscow, Stroyizdat, 1975, p.241).

In this device, under the influence of gravity, undissolved impurities located in the treated water are lowered to the bottom of the sump.

The disadvantages of the known design are large dimensions and low cleaning efficiency from undissolved impurities.

Also known is a tank for cleaning liquid by settling in the form of a vertical cylindrical container with a conical bottom (see US patent No. 4048069, B01D 21/00, 1977).

Inside the tank there is a pipe for supplying purified liquid and a tray for collecting purified liquid, as well as a pipeline for draining the purified liquid.

At the same time, a nozzle in the form of a spiral plate is installed on the pipe for supplying purified liquid, the outer edge of which is attached to the vessel wall with the formation of a gap, and also radially vertical walls are installed in the rings of the spiral plate.

In the lower part of the conical bottom there is a pipeline for the release of sediment.

The disadvantages of this device are the large dimensions of the reception and sedimentation zones and the complexity of the design.

Also known is a settling tank containing a vertical cylindrical tank with a conical bottom, systems for supplying and discharging water and removing contaminants (see patent RU No. 2182508, B01D 21/02, 2002).

The disadvantages of this device are the large dimensions of the reception and sedimentation zones, large labor costs during repair, low cleaning efficiency.

Also known is a descending sump containing a casing including cylindrical and conical sections, pipes for supplying contaminated water, discharge of contaminants, drainage of treated water (see patent RU No. 2122882, B01D 21/02, 1998).

The disadvantages of this device are the large dimensions of the reception and sedimentation zones, large labor costs during repair, low cleaning efficiency.

The common disadvantages of the presented analogues is that when using these devices in the special water treatment system of a nuclear power plant, a drain pit tank must be available; Effective operation of sedimentation tanks is possible only in the zone of stable laminar flow regime; low degree of purification of floor drain from fine particles.

Also known is a sump for wastewater treatment from suspended solids, including a casing, a source pipe for supplying raw water, a water distributor, a settling chamber (see copyright certificate SU No. 1712319, C02F 1/52, B01D 21/00, 1992).

The device contains filters with a mesh surface mounted in the upper part of the chamber, a tray for collecting clarified liquid and a pipe for removing sediment, while the mesh surface of the filters is made in the form of half cylinders, convex side in the direction of movement of the liquid.

A disadvantage of the known device is the low degree of efficiency of liquid separation, high operating costs.

The closest in technical essence to the claimed solution is a sewage treatment tank, including a housing, a source for supplying a source liquid, a liquid distributor, a settling chamber, a drain tray for collecting clarified liquid and a pipe for draining sludge (see patent RU No.2008062, B01D 21 / 02, 1994).

The presence in this device of a vertically arranged filter screen allows you to increase the efficiency of detention of finely dispersed particles of contaminants carried out from the clarification chamber.

However, this device also requires a tank-pit, has a large size, does not allow the separation of the medium into zones: a clean, brightened area and an area with particles of pollution.

The disadvantages of this device is the lack of separation of dirty and clean streams, the removal of fine particles and particles with a density less than the density of water.

The objective of the claimed utility model is to create a device with a dual function of the tank-sump and tank sump.

The technical result of the proposed solution is to increase the efficiency of the device by improving the hydrodynamic conditions of the course of the cleaning process and reducing its size.

To achieve the specified technical result in a device for collecting and treating drain water, including a container with a cylindrical body and a conical bottom, elements for supplying and discharging water and removing contaminants, the water flow distributor, according to the proposal, the container body is divided by a partition into a cell with clean water and a cell with contaminated water, while the partition is not made to the full height of the tank to allow water from the cell with contaminated water to enter the cell with clean water, while in the upper part of the cell Dams with contaminated water have a pacifier made in the form of a sheet with holes and an expander that is connected on one side to the water supply elements and, on the other hand, to a water flow distributor located along the vertical axis of the device in the direction of movement of the contaminated water stream.

The essence of the proposal is illustrated by drawings, where figure 1 shows a longitudinal section of a General view of the device; figure 2 shows a cross section of the device; figure 3 shows the distributor of the flow of water.

It should be noted that the drawings show only those details that are necessary for understanding the essence of the proposal, and the accompanying equipment, well known to specialists in this field, is not presented in the drawings.

A device for collecting and treating floor drain water is made in the form of a container 1 with a cylindrical body of 10 m in volume with a conical bottom 2 mounted vertically on supports. The tank 1 is divided by a partition 3 into a clean cell 4 with clean and clarified water and a dirty cell 5 with contaminated water (FIGS. 1, 2).

In this case, the partition 3 is not made to the full height of the tank 1, but in such a way as to ensure the possibility of clean water from the cell 5 with contaminated water into the cell 4 with clean water in the upper part of the tank 1.

An expander 6 is embedded in the cell 5 of the tank 1, designed to damp the speed of the incoming floor drain and connected on one side with water supply elements.

On the other hand, to the expander 6 is attached a distributor 7 (Fig. 3) located along the vertical axis of the device in the direction of movement of the contaminated water flow and designed to further reduce the flow rate of the floor drain and evenly distribute the flow over the tank 1.

In the upper part of the cell 5 of the tank 1, a soothing element 8 is mounted, which is made in the form of a hole sheet with flooded holes, and serves to uniformly pour clarified water into a clean cell 4.

The device operates as follows.

Special sewage contaminated with mechanical impurities drainage water from the NPP buildings, as well as solutions that are formed during the decontamination of the equipment and premises of the NPP, enter cell 5 with the contaminated water of capacity 1 through the expander 6.

The expander 6 allows you to quench the flow rate and average the incoming flow of floor drain water.

In the distribution element 7 there is an additional quenching of the flow rate of the liquid, a uniform distribution of the incoming stream, while mechanical impurities settle on the bottom of the tank 1, forming a slurry.

The sludge is pumped out through the hole in the conical bottom 2 as it accumulates.

The drain water purified from the sludge rises upward with a uniform flow at low speed and overflows into the clean cell 4 of the container 1 through the upper edge of the internal partition 3.

The soothing element 8 allows for a uniform overflow of clarified water into a clean cell 4 of the tank 1.

Water without mechanical impurities enters directly into the clean cell 4 of the tank 1. Pure and clarified water is pumped out automatically, fed for further processing and returned to the process.

The inventive utility model made it possible to combine in one technical solution the functions of the drainage tank of the floor drain and drain tank of the drain floor due to the separation of flows, thereby freeing up the useful area in the room.

Claims (1)

A device for collecting and treating drain water, including a container with a cylindrical body and a conical bottom, elements for supplying and discharging water and removing contaminants, a water flow distributor, characterized in that the container body is divided by a partition into a cell with clean water and a cell with contaminated water, This partition is not made to the full height of the tank to allow water from the cell with contaminated water to enter the cell with clean water, while in the upper part of the cell with contaminated water there is a damper, you filled in the form of a sheet with holes, and an expander, which is connected on the one hand with water supply elements, and on the other hand with a water flow distributor located along the vertical axis of the device in the direction of movement of the polluted water stream.