Resin regeneration plays a crucial role in water treatment. There are several influencing factors, such as the purity of the regenerant and its usageQuantity, etc. So we need to determine the purity and dosage of the regenerant.

Purity of regenerant

It is generally believed that the regeneration effect of hydrochloric acid is superior to that of sulfuric acid, and the regeneration cost of sulfuric acid is lower than that of hydrochloric acid. The purity of the regenerant is high, and it contains impuritiesThe smaller the amount, the higher the regeneration degree of the resin, especially having a greater impact on the Perlite softening resin.

Dosage of regenerant

The dosage of regenerant is an important factor affecting regeneration. Its concept refers to the amount of regenerant used per unit volume of resin, with the unit beingkg/m3(Resin)org/L(Resin). Another commonly used indicator is the specific consumption of regenerant, which refers to the amount of regenerant addedThe ratio to the working exchange capacity of the obtained resin. Another representation is the consumption of regenerant, which is the expected unit of work to be obtainedPure regenerative dose required for exchange capacity, unitg/mol.

Increasing the dosage of the regenerant can enhancePUROLITEThe regeneration degree of the resin, but when the specific consumption of the regenerant increases to a certain extent, the improvement in the regeneration degree is not obvious. The amount of regenerant required is related to the properties of the ion exchange resin. Generally, the amount of regenerant needed for strong-type resins is higher than that for weak-type resins. The amount of regenerant used varies with different regeneration methods, and the amount of regenerant used should be higher than that used in countercurrent regeneration. When the regeneration method of softening resin adopts co-current flow, since the regenerant first comes into contact with the exhausted resin at the top, this part of the resin is well regenerated. When the regenerant flows down again and comes into contact with the resin at the bottom of the exchanger,It seriously affected the regeneration degree of the exchange resin, causing this part of the resin to not be fully regenerated and thus influencing the effluent quality. If the regeneration degree of this part of the resin is to be enhanced, the amount of regenerant used should be increased.

Softened PerliteA600When the resin regeneration method adopts countercurrent, since the resin at the bottom of the exchanger is always in contact with fresh regenerant, a very high degree of regeneration can be achieved. During operation, water comes into contact with this part of the highly regenerated resin, ensuring the quality of the effluent water. When countercurrent regeneration is adopted, the regeneration degree of the resin at the upper part of the water treatment equipment exchanger is poor. Although it first comes into contact with the influent water, due to the low ion content exchanged from the resin in the water, ion exchange can still be carried out, and the exchange capacity of this part of the resin can still be fully utilized.

Therefore, improving the purity and dosage of the Purlite water softening regenerant in this way is an important aspect that we need to control well. Only by grasping these points well can the role of the water softening resin be fully exerted.