RU3275U1 - WATER TREATMENT PLANT - Google Patents

Abstract

1. Installation for water purification, comprising a supply pipe and serially connected units for pre-treatment, membrane treatment and water disinfection, characterized in that the membrane treatment unit is made of a battery of membrane devices and is equipped with a brine outlet pipe connected through a throttle and a flow meter to a brine discharge pipe and through the throttle and flow meter with the brine return pipe to the pump inlet, and the filtrate discharge pipe from the membrane unit is connected to the disinfection unit during s equipped ultraviolet izluchatelem.2. Installation according to claim 1, characterized in that the pre-treatment unit is made of series-connected bulk, and / or cartridge, and / or sorption filters. Installation according to claims 1 and 2, characterized in that the device for aeration of water and / or dosing of coagulating reagents is additionally included in the pre-filter unit before the filters. Installation according to claims 1 and 2, characterized in that the sorption filter is installed after the membrane cleaning unit in front of the water disinfection unit.

Description

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P Model for water purification The model relates to the field of water purification and can be used in technology, food industry, medicine and other fields. Known installations for water treatment, including the site of preliminary preparation of the source water, pumps and the site of the membrane apparatus. / Installations for desalination and wastewater treatment by the reverse osmosis process and high gl.trafi.ltration, N.E. Kozhevnikova, A.K. Orlov, NIITEKHIM, M., 1979 /, Known station for water purification and desalination / Patent RU No. 20046490 С02 F 9/00, 1994 /, containing a coarse water filter, pre-filter from hollow ultrafiltration fibers, a circulation pump, reverse osmosis apparatuses, a sorption filter, a sterilizing device, flow meters, four- and three-way valves, salinity sensors and a salinity control device. The specified installation allows you to get drinking water from the source water of various quality and at the same time adjust the salt content in the resulting water. Its disadvantage is a complex technological scheme with a large number of interconnected elements, the failure of any of which can lead to a violation of the quality of purified water. In this installation, the optimal hydrodynamic conditions for the operation of the membrane elements are not provided, which reduces their resource. In addition, in the known installation for obtaining the necessary salt content, parts of the concentrate stream are mixed with the filtrate of the second stage of reverse osmosis apparatuses and undergo final purification only on a sorption filter, which will not allow to obtain the required quality of drinking water in the presence of high content of some impurities in the source water, not removed by sorption filter. MKI C02 F 9/00 3 a (s, .wl ji is to improve the quality of water treatment, increase the service life of the installation, in particular, membrane elements. The task of the model is ........: it is solved by the fact that the cleaning installation contains a supply pipe and connected in series units of pre-treatment, membrane cleaning and disinfection of water, and the membrane cleaning unit is made of a membrane battery and is equipped with a brine outlet pipe connected through a throttle and a flow meter to a brine discharge pipe and through a throttle and a flow meter with a pipe brine return water to the pump inlet, and the filtrate discharge pipe from the membrane unit is connected to a water disinfection unit equipped with an ultraviolet emitter. In addition, a pre-filter unit in front of the filters further includes a device for aerating water or a device for dispensing coagulating reagents in or a combination of these devices. In addition, the sorption filter can be excluded from the preliminary cleaning unit and installed after the membrane cleaning unit in front of the water disinfection unit. Compared with the prototype, the inventive pvl141Yu 1G "rDno1I provides both a discharge of brine and a return of part of the brine to the entrance of the membrane apparatus. The flow rates of the suction and return parts of the brine are regulated using chokes and flow meters on the pipelines for discharge and return of brine, and their values are set depending on the capacity of the installation and the quality of the source water. By returning part of the brine to the inlet of the membrane apparatuses, an increase in the flow rate relative to the surfaces of the membranes is achieved and thereby their pollution is prevented. This allows you to several times increase the life of the membrane elements. fj //

a filter with a filter charge, for example, from quartz sand to remove particulate matter, a sorption filter with a filter charge of activated carbon to remove organic impurities and residual chlorine and cartridge filters with porous filter elements (pore size from 0.5 to 20 microns), task which is to prevent particles of filter materials from entering the membrane elements.

With a low content of dispersed and organic impurities in the source water, the installation according to the claimed invention is equipped only with cartridge filters to eliminate the likelihood of contamination of membrane elements by accidentally trapped particles.

With a high content of organic impurities in the source water, the preliminary cleaning unit before the filters includes a dosing device for coagulating reagents, for example, aluminum sulfate, which removes organic impurities on the bulk filter.

In the event that the source water contains divalent iron or manganese compounds, ammonia, hydrogen sulfide, the inventive installation is equipped with an aeration device for introducing an oxidizing agent, for example, oxygen, and an accumulation tank to ensure the completeness of the oxidation process. The aeration device and tank are installed in front of the filters.

With a low content of organic impurities in the source water and, if necessary, the removal of residual free chlorine from the water, the sorption filter in the inventive installation is located on the pipeline for removing the filtrate from the membrane elements in front of the disinfection unit. This ensures an increase in the service life of the filter load of the sorption filter.

Figure 1 shows a schematic diagram of the proposed installation, where 1 inlet pipe, 2 - pre-treatment unit, 3 - pump, 4 - battery of membrane devices, 5 - discharge brine pipe, 6 - brine discharge pipe, 7 - throttle, 8 - flow meter 9 - throttle, 10 - flowmeter, 11 - brine return pipe to the pump inlet, 12 - discharge pipe

Figure 2a shows a schematic diagram of a preliminary treatment unit, where 1 is a supply pipe, 14 is a bulk filter, 15 is a sorption filter, 16 is a cartridge filter.

In Fig.2b shows a schematic diagram of a pre-treatment unit with a dispensing device for coagulating reagents - 17.

Figure 2c shows a schematic diagram of a pre-treatment unit with a device for aerating water 18 and a storage tank 19.

On Fig. 3 shows a schematic diagram of the installation with a variant of the location of the sorption filter 20 between the battery of the membrane apparatus 4 and the disinfection unit 13.

Installation works as follows. The purified water flows through the inlet pipe 1 to the preliminary treatment unit 2, where the dispersed and organic impurities and free chlorine are removed. After the pre-treatment unit, water is sent using a pump 3 to the battery of the membrane apparatus 4. The brine from the membrane apparatus 4 through the discharge pipe 5 is partially directed through the throttle 7 and the flow meter 8 to the brine discharge pipe and partially through the throttle 9 and the flow meter 10 to the brine return pipe And pump inlet 3.

The filtrate from the membrane apparatus 4 through the discharge pipe of the filtrate 12 enters the site of disinfection of water 13.

After the disinfection unit, water flows to consumers.

In the pre-treatment unit, water passes through a bulk filter 14 with a filter charge, for example, of quartz sand, designed to remove particulate impurities, a sorption filter 15 with a filter charge, for example, of activated carbon, designed to remove organic impurities and free chlorine, and a cartridge a filter 16 with a porous filter element designed to trap particles of filter materials.

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When treating waters with a high content of organic impurities, coagulating reagents, for example, aluminum sulfate, are dosed into the preliminary treatment unit in front of the filters using a metering device 17.

When cleaning water containing compounds of ferrous iron, manganese, ammonia, hydrogen sulfide, etc., an oxidizing agent, for example, atmospheric oxygen, is introduced into the preliminary treatment unit in front of the filters using the aeration device 18. In this case, water is supplied to the filters through the storage tank 19.

The table presents data characterizing the quality of the water received at the developed installation.

Table

The developed installation allows to obtain high-quality purified water and provides a longer service life of its units in comparison with known installations of a similar purpose.

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Claims (4)

1. Installation for water purification, comprising a supply pipe and serially connected units for pre-treatment, membrane treatment and water disinfection, characterized in that the membrane treatment unit is made of a battery of membrane devices and is equipped with a brine outlet pipe connected through a throttle and a flow meter to a brine discharge pipe and through the throttle and flow meter with the brine return pipe to the pump inlet, and the filtrate discharge pipe from the membrane unit is connected to the disinfection unit during s equipped with an ultraviolet emitter.  2. Installation according to claim 1, characterized in that the pre-treatment unit is made of series-connected bulk, and / or cartridge, and / or sorption filters.  3. Installation according to claims 1 and 2, characterized in that the device for aeration of water and / or dosing of coagulating reagents is additionally included in the pre-filter unit before the filters.  4. Installation according to claims 1 and 2, characterized in that the sorption filter is installed after the membrane cleaning unit in front of the water disinfection unit.