A kind of ion exchange resin regeneration method

Abstract

The invention provides an ion exchange resin regeneration method. The ion exchange resin regeneration method is characterized by comprising the following steps: (1) carrying out backwashing, namely introducing dilute regenerating liquid from the bottom of an ion exchange resin column, carrying out backwashing on the inside ion exchange resin, soaking for 25-35min, then converting the dilute regenerating liquid into concentrated regenerating liquid in a column body, and discharging the obtained concentrated regenerating liquid to a concentrated liquid collecting groove through compressed air, wherein the liquid inlet flow rate of the dilute regenerating liquid is 2-4BV / h, and the using amount of the dilute regenerating liquid is one-time bed body; (2) washing, namely, introducing 10% dilute sulphuric acid from the top of the ion exchange resin column, converting the dilute sulphuric acid into dilute regenerating liquid in the column body, discharging the dilute regenerating liquid to a dilute liquid collecting groove, and emptying residual liquid to complete the regeneration of the ion exchange resin, wherein the flow rate of the inlet liquid is 1-2BV / h and the using amount of 10% dilute sulphuric acid is one-time bed body. According to the regeneration method, the regenerating liquid is divided into the concentrated liquid and the dilute liquid, so that the using amount of the regenerating liquid can be effectively saved, and the regenerating cost can be effectively lowered.

Description

technical field [0001] The invention relates to an ion exchange resin regeneration method. Background technique [0002] After the ion exchange resin (IONRESIN) has been used for a period of time, the adsorbed impurities are close to the saturation state, so it needs to be regenerated, and the ions and other impurities adsorbed by the resin are eluted with chemicals to restore its original composition and performance. [0003] In practical application, in order to reduce the cost of regeneration, the amount of regenerant should be properly controlled, so that the performance of the resin can be restored to the most economical and reasonable regeneration level, and the degree of performance recovery is usually controlled at 70-80%. If a higher regeneration level is to be achieved, the regeneration dosage should be increased substantially, and the utilization rate of the regeneration agent will decrease. This patent has invented a relatively low-cost regeneration method, whic...

AI Technical Summary

Problems solved by technology

[0007] This regeneration process consumes a large amount of regeneration liquid, and there is only forward washing, no backwashing, the regeneration effect is average, the regeneration liquid is inefficient, and a large amount of pure water is used for washing after regeneration, which not only wastes water resources, but also increases regeneration costs.