Introduction to soft water salt

Chinese Name: soft water salt

Main ingredients: sodium chloride (NaCl) with purity above 99.1%

Also known as: ion exchange resin regeneration agent

Working principle of water softener

      There are many kinds of water treatment methods, and the water treatment technology selected by water softener is ion exchange technology. All ion exchange resins of advanced water purifier are usually sodium sulfonate ion exchange resins.

Through the exchange of functional ions on the resin with calcium and magnesium ions in water, the harmful impurity ions in water (mainly calcium ions Ca and magnesium ions mg) are adsorbed in the resin to achieve the purpose of purifying water quality.

In order to remove the impurities adsorbed by the resin, sodium ion (NA) is needed to replace the impurities adsorbed by the resin through ion exchange by backwashing, so as to restore the adsorption capacity of the ion exchange resin. This process is also called regeneration of the ion exchange resin.

Characteristics of soft water salt

1. The content of sodium chloride in soft water salt is 99.1%; It's food grade.

2. The shape of soft water and salt shall be consistent, without adhesive, bridging, lumping, collapse and blocking equipment, so as to ensure the quality and efficiency of soft water;

3. The ability of removing iron ions in soft water salt is 6 times of that in general industrial salt, which can protect the equipment efficiently;

4. It can double remove impurities in water, improve the efficiency of water softener, reduce maintenance and prolong service life.

Benefits of soft water

1. The water quality is smooth and the oxygen content is higher（ Aquaculture (mostly used)

2. Avoid water stains and dirt of sanitary ware and scaling of cold and hot water pipes（ Hospital water, boiler water, heating (necessary)

3. After bathing, the skin is smoother and the hair is more supple（ Soft water for beauty salons

4. After washing, the clothes are more fluffy and soft, and the color is more gorgeous; Reduce the amount of chemical detergent（ Family, high-grade hotel supporting the use of more; Laundry soft water (essential)

5. The content of sodium chloride in salt is more than 99.1%; Domestic soft water is safer to drink.

Soft water salt plays an important role in the water softener. If there is no soft water salt in the water softener, the ion exchange resin will gradually fail, and the corresponding water softener will lose the function of softening and purifying water quality. However, it is not recommended to drink the water from the softener directly, because the soft water salt can only remove calcium and magnesium ions and some suspended solids in the clean water, and can not kill bacteria.

Calculation method of salt consumption and concentration for softened water equipment

Generally speaking, it can be calculated as follows: resin amount (L) * 160 = salt amount (g), concentration of soft water salt NaCl regeneration solution 5-12%; For example, if the amount of resin is 10L, it is generally 10 * 160 = 1600g, i.e. 1.6kg per regeneration, which depends on the hardness of influent water and the quality of effluent water.

The simple calculation method of salt consumption for resin regeneration is as follows:

1) The concentration of NaCl regeneration solution is 5-12%;

The concentration of salt solution is determined by the proportion of the water flow injected into the jet and the saturated salt solution absorbed. Generally, the concentration of salt solution is between 5% and 12%. The higher the inlet pressure is, the higher the concentration after mixing is. Setting parameters in general: back suction for 10 minutes, regeneration for 30-50 minutes, water injection for 10-20 minutes (salt bucket with float control), you can make small range changes on the basis of the above parameters.

2) The amount of regeneration liquid is 2-3 times of resin loading volume;

That is, salt is required per liter of resin

Minimum salt consumption: 2 times x concentration 5% = 100g

Maximum salt consumption: 3 times x concentration 8% = 240g

Take the middle value: 2 times x concentration 8% = 160g

The salt consumption of 1l resin regenerated by countercurrent is about 80-160g, and that of 1l resin regenerated by countercurrent is about 160-240g. Now the automatic control valve is downstream regeneration with less faults and larger salt consumption. When adding salt to the salt tank, it should be noted that large salt particles must be used, because there is a gap between large salt particles for salt dissolution, and fine salt will slow down if it does not dissolve. In addition, always ensure that the salt particles are higher than the liquid level of brine, that is, there is no water but salt, so as to ensure that it is saturated salt liquid. It is against the saying that "as long as there is undissolved salt in the salt barrel".

In addition to the concentration and dosage of the regeneration solution, users should also pay attention to the fact that the contact time of the regeneration solution should not be less than 30 minutes to ensure the regeneration effect. It is wrong for many small water softeners to use saturated brine with twice the volume of resin to pass through quickly.