LIQUID PURIFICATION SYSTEM

Abstract

The invention relates to liquid purification and/or desalination systems, predominantly water from different sources, and is used in household and/or drinking water supply, in suburb and country houses. Liquid purification system, comprising of raw liquid line with the inlet valve, reverse osmosis membrane connected to drainage line and purified liquid line and purified liquid consumption line and purified liquid vessel, secondary purified liquid line, connected to purified liquid vessel and to raw liquid line and to console panel, characterized in that debris layer on the reverse osmosis membrane is near totally dissolved by intensive repeated flushing of the reverse osmosis membrane with purified liquid.

Claims

1. Liquid purification system, comprising of raw liquid line with the inlet valve, reverse osmosis membrane connected to drainage line and purified liquid line and purified liquid consumption line and purified liquid vessel, secondary purified liquid line, connected to purified liquid vessel and to raw liquid line and to console panel, characterized in that debris layer on the reverse osmosis membrane is near totally dissolved by intensive repeated flushing of the reverse osmosis membrane with purified liquid.

2. Liquid purification system, according to claim 1, characterized in that the number of flushings within one flushing cycle is not less than two but not more than six, predominantly four times.

3. Liquid purification system, according to claim 1, characterized in that includes recirculation line, equipped with the valve and connected to raw liquid line before circulation pump on the raw liquid line before reverse osmosis membrane.

Description

[0014] FIG. 1 shows the liquid purification system.

[0015] The liquid purification system comprises raw liquid line 1 with inlet valve 2 and circulation pump 3, installed consequently, reverse osmosis membrane 4, purified liquid line 6, equipped with the valve 7 and purified liquid vessel 8, purified liquid consumption line 13, drainage line 5, equipped with the valve 16, secondary purified liquid line 9, equipped with the valve 10, recirculation line 11 with the valve 12, and console panel (not presented on the FIGURES). Raw liquid line 1 is connected to inlet of reverse osmosis membrane 4. Purified liquid line 6, equipped with the valve 7 and purified liquid vessel 8 are connected to purified liquid reverse osmosis membrane outlet. Recirculation line 11 and drainage line 5 are connected to reverse osmosis membrane drainage outlet. Recirculation line 11 with the valve 12 is connected to raw liquid line 1 after inlet valve 2 before circulation pump 3. Purified liquid consumption line 13 and secondary purified liquid line 9 with the valve 10, with the outlet connected to raw liquid line 1 after inlet valve 2 before circulation pump 3 are connected to purified liquid vessel 8 (FIG. 1). Inlet valve 2, circulation pump 3, valves 7, 12 and 16 are operatively connected to console panel (not shown on the FIGURE).

[0016] Purified liquid vessel 8 is, but not limited to, the vessel with two cavities, separated with the flexible partition (not shown on the FIGURE). Purified liquid cavity 14 is defined by inner walls of the flexible partition. Compressible medium cavity 15 is defined by inner walls of the purified liquid vessels 8 body and outer walls of the flexible partition (not shown on the FIGURES). Cavity 15 is filled with compressible medium, for example, but not limited to air, inert gas, or raw liquid. In this case raw liquid line 1 goes through compressible medium cavity 15 and recirculation line 11 is connected to raw liquid line before purified liquid vessel 8. Also purified liquid vessel 8 may be made as pressure tank or gravity tank, equipped with booster pump.

[0017] Additionally, system may contain one or more collecting vessel, one or more drainage vessel, pressure creating means, flow restrictors, prefilters, postfilters, liquid cpe sterilization liquid means, antiscalant dispensing means and/or other additives monitors and other.

[0018] Within features of the invention the liquid purification system works as follows.

[0019] Raw liquid under pressure flows along raw liquid line 1 through open inlet valve 2 into circulation pump 3 to the inlet of the reverse osmosis membrane 4, where liquid is purified. Purified liquid flows to the purified liquid line 6 and through open valve 7 flows into purified liquid cavity 14 of purified liquid vessel 8 and/or purified liquid consumption 13. While the purified liquid cavity 14 is filled with purified liquid, pressure in the compressible medium cavity 15 is growing. When the purified liquid vessel 8 is made as pressure tank, purified liquid flows into the vessel and the pressure inside it grows. During purification process the valve 16 is closed, so the drainage flows out of the reverse osmosis membrane 4 along recirculation line 11 and returns on the raw liquid line.

[0020] When the predetermined level of purified liquid in the cavity 14 is reached, console panel closes inlet valve 2 and valve 7. The system goes into the flushing mode. For short time console panel opens valve 16 and drainage which is left in the system flows out along the drainage line 5. After predetermined short period of time console panel closes the valve 16. So only valves 10 and 12 are opened. As the valve 2 on the raw liquid line 1 is closed pressure on raw liquid line decreases, as there is no raw liquid under pressure. At the same time purified liquid in the vessel 8 is under pressure. Due to this pressure portion of purified liquid flows along secondary purified liquid line 9 through opened valve 10 to raw liquid line 1. When portion of the purified liquid flows out of the vessel 8 to the raw liquid line, pressure in the vessel 10 decreases and this prevents leakage of more liquid. The flushing is done in the following wayportion of purified liquid along raw liquid line 1 through circulation pump 3, which increases purified liquid flow velocity flows into the inlet of the reverse osmosis membrane 4. As valves 16 and 7 are closed, liquid after reverse osmosis membrane 4 flows to the recirculation line 11 and through opened valve 12 returns raw liquid line 1. After purified liquid has filled the reverse osmosis membrane 4 and recirculation line 11, console panel closes valve 10. So only valve 12 remains opened. Part of the raw liquid line 1 from inlet valve 2 to reverse osmosis membrane 4, including circulation pump 3, reverse osmosis membrane 4 and recirculation line 11 form the flushing closed circuit. Liquid inside this circuit passes it not less than two, but not more than six times, predominantly four times. The flow velocity remains high. After it console panel opens the valve 16 on the drainage line 5 and flushing liquid flows out of the system, additionally washing out the debris which are left in lines.

[0021] Against the closest analogue due to that circulation pump 3 keeps working, liquid inside the circuit has more stable flow velocity. Due to high velocity liquid several times passes the reverse osmosis membrane 4, providing effective flushing. So, such effective flushing is done with the relatively small amount of liquidthe effectiveness of flushing increases, the purified liquid consumption decreases. Also due to stable pressure in the circuit reverse osmosis membrane 4 does not undergo hydraulic shock, and that increases its operational life.

[0022] In the description of the invention the preferable embodiment is given. The invention maybe changed, but within the limits of the present claims. This gives the possibility of its common use.