RU2516130C2 - Bbc water treatment plant - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to water treatment plants. Proposed BBC plant comprises prefiltering unit 1, primary cleaning unit 2, decontamination unit and control unit. Additionally, this plant comprises water accumulator connected with prefiltering unit and water feed unit connected with primary cleaning unit and decontamination unit. Said primary cleaning unit 2 is composed by nanofiltration and hyperfiltration devices.

EFFECT: higher efficiency of filtration.

2 cl, 4 dwg

Description

The invention relates to installations for the purification of liquids, in particular water.

There are known installations for cleaning and softening water, including a flotation unit and a filtration unit (see, for example, descriptions of inventions to patents RU 2095315, IPC 6 C02F 1/00, C02F 1/24, C02F 1/20, publication date 10.11.1997; RU 2107032 IPC 6 C02F 1/24, publication date 03/20/1998).

The main disadvantage of similar devices is the insufficiently high degree of water, both from iron and hardness salts.

The closest analogue of the claimed technical solution is the Installation for water purification and softening, containing a pre-filtering unit, a main cleaning unit, a disinfection unit, a control unit, (see, for example, utility model description to patent RU 106613, IPC C02F 1/00 (2006.01), publication date 07/20/2011).

The disadvantage of the closest analogue is the insufficiently high degree of water purification due to the inability to remove hydrogen sulfide, ammonia, chlorides, sulfates and excessive salinity.

The technical result is to provide a higher degree of water purification.

The essence of the claimed technical solution is characterized in that it contains a pre-filtering unit, a main cleaning unit, a disinfection unit, a control unit, and differs from the closest analogue in that it is equipped with a water storage unit connected to a pre-filtering unit, a water supply unit connected to the unit main cleaning and with a disinfection unit, while the main cleaning unit is made in the form of a nanofiltration device and a hyperfiltration device.

The essence of the technical solution is illustrated by drawings.

Figure 1 is a view in vertical section.

Figure 2 is a view in vertical section from the end along aa.

Figure 3 is a top view without a roof along BB on the left side with a pre-filtering unit;

figure 4 is a top view without a roof along BB in the middle and right parts.

Block-modular installation for purification and water supply contains a pre-filtering unit 1, a main cleaning unit 2, a disinfection unit 3, a control unit 4, a water storage unit 5 connected to a pre-filtering unit 1, a water supply unit 6 connected to the main cleaning unit 2 and with a disinfection unit 3, while the main cleaning unit 2 is made in the form of a nanofiltration device and a hyperfiltration device (Figs. 1, 2, 3, 4).

Block-modular installation for purification and water supply can be made of two parts, for example, the upper and lower, in particular from the ground and underground parts (figure 1).

In the lower, in particular underground, part, there is a water storage unit 5 and a water supply unit 6. By means of a water storage unit 5, the source water is accumulated by submersible pump units 8 to the pre-filtration unit 1. The water storage unit 5 and the water supply unit 6 can be placed inside a cylindrical horizontal tank divided by sealed partitions into several parts, the first of which is the water storage unit 5 to be cleaned, the second part is the water supply unit 6 in the unit is disinfected 3, the third part is a pumping station 7 for supplying purified water to an ultraviolet disinfection unit for disinfection unit 3 and for consumption (FIGS. 1, 2, 3, 4).

The remaining elements of the modular installation for cleaning and water supply are located in the upper part.

The pre-filtering unit 1, depending on the composition of the water supplied for treatment, may contain various combinations of filters:

coarse water filter,

iron removal and manganese removal filter,

lighting filter

softener filter,

adsorption filter,

polymer filter.

The main cleaning unit 2, made in the form of a nanofiltration device and a hyperfiltration device (otherwise called reverse osmosis).

Block-modular installation for purification and water supply contains reagent blocks:

block for the preparation and dosing of a coagulant solution,

alkali solution preparation and dosing unit,

block for the preparation and dosing of sodium hypochlorite,

reagent preparation and batching unit for membrane installations.

Reagent units ensure stable operation of the installation.

The disinfection unit 3 is made in the form of an ultraviolet disinfection unit for purified water.

In the upper (ground) part of the installation is also located the control unit 4 (Fig.1, 4).

The main cleaning unit 2, made in the form of a nanofiltration device and a hyperfiltration device, allows you to purify any type of water (surface and underground sources) to sanitary standards, and also provides the supply of purified water through the disinfection unit 3 to the consumer.

The main function of water purification is performed by the main purification unit 2, which delays most of the undissolved and dissolved impurities, purifying water to established sanitary standards.

The main feature of the modular unit for water purification and supply is its compactness, an integrated approach to solving the problems of water purification and transportation, and the location of the necessary equipment in one module.

The work of the modular installation for cleaning and supplying water is as follows.

The source water enters the water storage unit 5, from where it is sent by submersible pump units 8 to the preliminary filtering unit 1 located in the upper part of the installation (Figs. 1, 2, 3, 4).

If necessary, the pre-filtering unit 1 is equipped with combinations of various filters that provide partial reduction of contaminants before being fed to the main cleaning unit 2. Also, pre-filtering unit 1 can accommodate the preparation and dosing of coagulant and alkali, sodium hypochlorite and other reagents to ensure maximum efficiency of the preliminary water purification.

Preliminary water purification in the pre-filtering unit 1 consists in removing coarse impurities, fine impurities, colloids, iron and manganese, odors, reducing turbidity, hardness, and improving organoleptic properties.

From the pre-filtering unit 1, the water flow is sent to the main cleaning unit 2 (Figs. 1, 2, 4). The principle of operation of the main cleaning unit 2 is based on the principle of membrane filtration: under the influence of applied pressure, water is passed through a semipermeable membrane with a small pore size (0.8-10 nm for nanofiltration and 0.1-3 nm for hyperfiltration). As a result of filtration, all contaminants are retained on the membranes, the size of which exceeds the pore size of the membranes. In this case, the removal of calcium and magnesium ions, reduction of excess salinity, reduction in the concentration of chlorides, sulfates, removal of boron, silicon, etc.

To increase the service life of the membrane elements and ensure the stability of cleaning, special reagents are dispensed to prevent the formation of deposits on membranes and other nodes before the water is supplied to the nanofiltration device and the hyperfiltration device.

Depending on the composition of the water, one part of the stream of water pretreated on the filters can be sent to the nanofiltration device and the hyperfiltration device, and the other part of the water stream to the water supply unit 6. The use of this technology allows you to save the necessary salt composition of water, as well as significantly reduce the costs associated with with the installation of more productive and more powerful nanofiltration devices and hyperfiltration devices.

The purified water is sent to the water supply unit 6, from where the pumping station 7 delivers to the ultraviolet disinfection units in the disinfection unit 3 located in the ground part of the unit.

Under the influence of ultraviolet radiation, water is disinfected without the use of reagents, which positively affects the organoleptic properties of water (taste, smell).

Disinfected water is supplied for consumption by means of a pumping station 7 (Figs. 1, 2, 4).

The control unit 4 located in the upper (ground) part of the installation allows you to control the cleaning processes with the greatest energy efficiency: water is supplied and the units are turned on as necessary, according to the signals of various sensors located at different stages of cleaning.

The advantages of the claimed block-modular installation for purification and water supply:

compactness;

the possibility of delivery in full factory readiness, respectively, guaranteed high quality and low cost;

lack of need for design work, since the finished certified product is supplied;

wide range of applications from 10 m3 / hour to 500 m3 / hour;

full automation of the process of purification and water supply, which does not require the constant presence of staff;

possibility of remote control control.

Claims (2)

1. Block-modular installation for purification and water supply, comprising a pre-filtering unit, a main cleaning unit, a disinfection unit, a control unit, characterized in that it is equipped with a water storage unit connected to a pre-filtering unit, a water supply unit connected to the main unit cleaning and with a disinfection unit, while the main cleaning unit is made in the form of a nanofiltration device and a hyperfiltration device. 2. Block-modular installation for purification and water supply according to claim 1, characterized in that the water storage unit and the water supply unit are located in its lower part located underground.

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