RU37986U1 - FILTER INSTALLATION - Google Patents

Description

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FILTER INSTALLATION

The utility model relates to the field of water purification, namely to devices for water purification using reverse osmosis plants.

Currently, filtration modules based on reverse osmosis are widely used in practice due to the high cleaning efficiency and the relative cheapness of the equipment used both independently and as an element of more complex integrated systems.

In particular, a water purification system is known (US Pat. Nos. 4,808,287.1988, class B 01 D 13/00), including a pre-filter, two activated carbon filters, a 1-5 micron filter and two installations reverse osmosis operating under pressure of about 28 atm. The specified set of devices is notable for the complexity associated with the need to use hydraulic pumps and create high pressures, insufficient efficiency and low reliability.

The device (US Pat. RF No. 2162739.1997, Cl. 01D 63/02) proposes to improve the reverse osmosis process by placing a number of additional membranes in the module. However, the proposed solution leads to the formation of a significant number of stagnant zones, leading to contamination of the resulting water by microorganisms.

MKl. C02 F 9/00

61/02), consisting of a housing with a tube and a membrane wound on it, a pump and shut-off and control devices (valves) that allow changing the direction of raw water running along the membrane to the opposite. The housing has for the passage of raw water, drainage of concentrate, drainage of clean water and an opening for alternating entry and exit of water.

The disadvantage of this installation is the presence in the body of stagnant zones that contribute to the development of microflora, which limits the possible areas of application of the resulting water.

The problem solved by the authors was to create such an installation where the likelihood of the formation of such zones would be minimal or completely excluded.

It was found that this problem is solved by directing the installation based on the reverse osmosis module on the filtrate line of the recirculation loop, consisting of a pump and shut-off control devices (ZRU) -electromagnetic valves or membrane valves.

The reverse osmosis module consists of one or more series-connected reverse osmosis elements. In this case, between the elements, a deionization unit can be additionally switched on with the possibility of directing the concentrate from the 2nd element back to the input of the deionization unit or the electrodeionization unit, with which the concentrate enters the storage tank.

The general installation diagram is shown in FIG. 1. The installation consists of a housing 1 with input 2 and output 3 fittings. Inside the housing there is a perforated tube 4 and a membrane 5 in the form of a roll wound on the tube 4. The installation also includes a pump 6 located on the filtrate line 7, connected to the holes of the tube 4 and locking and control devices (ZRU) 8 and 9 (electromagnetic

valves or diaphragm valves. The filtrate line has a line 10 for the supply of purified consumer water. The switchgear 9 is connected to the supply line 11 sanitizing chemical reagent, which provides the possibility of chemical cleaning and sanitation of the filtrate line.

The materials used in the construction of the module are resistant to thermal and chemical agents, which makes it possible to conduct thermal or chemical sanitization of the module and chemical washing of the membrane element in the filtrate line.

In the concentrate and recirculation lines, diaphragms can be additionally installed, restricting the flow and preventing the gradual destruction of the membranes of the reverse osmosis elements from the action of hydraulic shocks during fast hydraulic washing.

As a reverse osmosis membrane 5, it is advisable to use membrane ultrafiltration elements that allow purifying water from pyrogens and particles with sizes from 500 to 100 kilograms of Dalton.

Installation works as follows. The source water enters the housing 1 through the nozzle 2 and enters the membrane 5. The filtrate passes through the membrane 5 and the tube 4 and enters the line 7. Part of the filtrate goes into the finished product tank through line 10, and part is pumped through the switchgear 6 through the switchgear 8 into the tube 4, creating a direct current in it, eliminating the presence of stagnant zones.

The module provides the production of water of high microbiological purity by ensuring a constant flow of water in the filtrate line and the absence of stagnant zones into which intensive microbiological growth occurs.

Claims (3)

1. Filtration unit, consisting of a housing with fittings, in which a perforated tube with a membrane wound on it, a pump, highways and shut-off and regulating devices is placed, characterized in that it is equipped with a recirculation circuit consisting of a trunk, pump and shut-off and control equipment connected to the ends of the perforated tube. 2. The filtration unit according to claim 1, characterized in that it is equipped with a system that provides the ability to manually and automatically switch the filtrate flows. 3. The filtration unit according to claim 1, characterized in that diaphragms are additionally installed on the concentrate and recirculation lines.