Water purification using a household reverse osmosis system, regardless of the design of the system, involves the following steps:
1. three-stage preliminary cleaning;
2. Industriual Ro plant separation on the membrane element;
3. collection of purified water in the storage tank;
4. post-treatment or finish water treatment.
Let us briefly consider the structure and principle of operation of a household reverse osmosis system. The filter is connected to the cold water supply pipe using the inlet coupling 4 and the water supply tap 5.
Scheme of connecting the reverse osmosis system as standard: 1. Filtering module; 2. Tank; 3. Tap for purified water; 4. Input clutch; 5. Water tap; 6. Ball valve of the tank; 7. Colored tubes; 8. Drain clamp; 9. Key for pre filter housings; 10.1. Mechanical cleaning polypropylene cartridge (5 microns); 10.2. Activated carbon cartridge; 10.3. Carbon block; 10.4. Post filter; 10.5. Membrane element; 11. Tee; 12. Auto flow control
A red tube connects the water supply tap and pre filter 10.1 of the filtration module. The incoming water first goes through three stages of pre-treatment in the pre-filters 10.1, 10.2, 10.3. After passing the preliminary treatment, water enters the reverse osmosis membrane 10.5, which is located in a special case. The membrane housing has an inlet, which is connected through an auto regulator to the pre filter 10.3, and two outlets: one for permeate and one for concentrate.
After the membrane, the water flow is divided into two parts – the concentrate is discharged into the sewer, and the permeate enters the storage tank 2 and is stored there. The tank is connected to the membrane outlet through an auto regulator and a check valve integrated into the transition fitting, which is screwed into the outlet of the membrane body. After the auto regulator, a tee is installed, through which the tank is connected to the filtration module using the yellow tube. A ball valve 6 is installed on the upper nozzle of the tank.
After filling the tank, the auto regulator shuts off the water supply from the pre filters to the membrane, and the cleaning process stops. After opening the tap for purified water 3, the water pressure in the storage tank drops, the auto regulator automatically opens the water supply from the pre filters to the membrane, and the tank is refilled. The concentrate is fed into the sewer through the outlet of the membrane housing, connected by a black pipe with a drain clamp 8, which is installed on the sewer pipe.
From the storage tank, purified water through the tee 11 passes to the last cleaning stage – post-filter 10.4. The post-filter using a blue tube connects to the tap of purified water 3, which is installed directly on the sink or kitchen worktop.
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