Water Softening System Points Summary

When you see scale formation on the inner wall of the kettle when boiling water, it means that the water has high hardness, containing inorganic salts, such as calcium and magnesium salts, which will form precipitation when boiling. We usually use hardness to indicate the content of calcium and magnesium ions in water, 1mg/L hardness = 10 mg/L CaCO3

What is Water Softening System

The most commonly used method is the ion exchange method, which uses a strong acid cation resin to replace calcium and magnesium ions in the raw water with sodium ions; due to the high solubility of sodium salt, it avoids the formation of scale with the increase of temperature. The method is widely used in boiler water, chemical, pharmaceutical industry, etc.

What is the working process of Water Softening System

There are mainly 4 processes: Filtration, Backwash, Regeneration(Brine suction) and Flush, due to different actual processes or control needs, there may be some additional processes.

Why utilize Water Softening System

1. Avoid scale, save fuel and improve thermal efficiency

2. Reduce the amount of boiler inspection and repair and reduce safety hazards

Why the Water Softening System resin needs to be regenerated

When the water softening resin is used, the calcium and magnesium ions in the water can be removed by the principle of ion exchange. However, the resin will gradually become saturated during use, so it needs to be regenerated regularly.

Resin regeneration cycle calculation formula

= resin volume × resin working exchange capacity × 50 ÷ raw water hardness ÷ flow

How long does it take to replace the resin

The resin will gradually become saturated during use, so it needs to be regenerated regularly, but the resin cannot be regenerated indefinitely; generally the service life of the resin is 2-3 years, but still depends on the water quality of feed water. If the hardness of the feed water is too high, resin needs to be regenerated frequently, then the replacement period will be shortened.

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