The hardness of water is mainly composed of cations: calcium (Ca2+) and magnesium (Mg2+). When raw water containing hardness ions passes through the resin layer of the exchanger, calcium and magnesium ions in the water are replaced with sodium ions in the resin, and the resin absorbs the calcium and magnesium ions while the sodium ions enter the water, so that the water flowing out of Water Softening System is softened water with hardness ions removed.

I. Structure of Household Water Softener System

1. Import control valve: The valve body is made of high-strength lightweight corrosion-resistant engineering plastic and lead-free brass.

2. Corrosion-resistant tank: The tank is made of glass fiber reinforced plastic (carbon steel or stainless steel lined plastic tank can be selected), which is corrosion-resistant and pressure-resistant and has a long service life.

3. Uniform water distribution system: With jet water distribution, the effective exchange capacity of resin can be brought into full play, the control with salt is accurate, and no salt pump is needed.

4. Imported high-performance resin: strong acid cation exchange resin is selected, which has low breakage rate, uniform particle size and improved ion exchange rate.

II. Features of Whole House Water Softening System

1. High efficiency: the overall design of the demineralized water device is reasonable, so that the effective working exchange capacity of the resin can be fully exerted.

2. Labor saving: the degree of automation is high, and no special person is required to be on duty.

3. Water saving: the water production rate of the demineralized water device is over 98%.

4. Power saving: The siphon regeneration principle is adopted, and no salt pump is needed. The power consumption is only 1% of that of manual water softening equipment.

5. Small floor space: only the floor space of resin tank and salt tank is needed to save the space occupied by pipeline and salt pump.

6. Easy adjustment: Users can adjust the regeneration cycle and regeneration time according to actual needs.

7. Low operating cost: Because of the high degree of automation, the water softener can adapt to the change of water quantity, accurately measure the water yield and the amount of regenerant, thus avoiding the waste of regenerant during regeneration and saving a lot of labor costs.

III. Operation Process Of Wholehouse Water Softening System

1. Run

Under a certain pressure (0.2-0.6Mpa) and flow rate, raw water enters the container (resin tank) filled with ion exchange resin through the valve cavity of the controller, and Na+ contained in the resin exchanges with cations (Ca2+, Mg2+, Fe2+,etc.) in the water, so that the content of Ca2+ and Mg2+ ions in the outlet water of the container reaches the established requirements, and the softening of hard water is realized.

2. Backwashing

After the resin fails, before regeneration, backwash it with water from bottom to top. The purpose of backwashing is twofold. First, through backwashing, the resin layer compacted in operation is loosened, which is conducive to the full contact between resin particles and the regenerated liquid; Second, the suspended substance and broken resin accumulated on the surface of the resin are discharged with backwashing water, so that the water flow resistance of the exchanger will not become larger and larger.

3. Regenerative Salt Absorption

It is regenerated every 24 hours, and the regeneration time is 2 hours each time. The salt solution for regeneration flows through the failed resin layer at a certain concentration and flow rate to restore its original exchange capacity.

4.Slow Wash

After the regenerative liquid is fed in, there is still salt liquid in the exchanger that has not participated in the regenerative exchange. Clean it (slow cleaning) with clean water less than or equal to the flow rate of the regenerative liquid, so as to make full use of the regenerative effect of the salt liquid and reduce the load of the positive washing.

5. Quick Wash (regular wash)

The purpose is to remove the residual regeneration waste liquid in the resin layer, and it is usually cleaned at a normal flow rate until the effluent is qualified.

6. Inject Water into Regenerant Tank

Inject the solution into the regenerant tank to regenerate the required salt amount of water once.

Ⅳ. Resin Replacement Cycle

The resin replacement time generally ranges from several months to one year, which is mainly related to raw water quality (raw water hardness), resin quality, water consumption (equipment usage) and other factors. Whether the resin needs to be replaced mainly depends on the strength, exchange capacity and regeneration capacity of the resin. For example, if the resin strength is broken to more than 40%, it must be replaced; If the resin exchange capacity drops by 30%, it must be replaced.