Method for on-line recovery of ion exchange resin

Abstract

The invention discloses a method for the on-line recovery of ion exchange resin. The method for the on-line recovery of ion exchange resin is carried out in an ion exchanger and comprises the following steps: flushing the ion exchange resin by using desalted water so as to remove dust and suspended matters in the ion exchange resin; backflushing the flushed resin by using acid so as to remove metal ions which are adsorbed by the ion exchange resin; soaking the resin by using a mixed solution 5-7% Na2SO4 and 8-10% NaOH so as to remove organic matters in the ion exchange resin; and NaOH solution is used to regenerate the ion exchange resin. The method for the on-line recovery of ion exchange resin can realize the on-line recovery of the ion exchange resin and has good recovery effect, the recovery solution cost is reduced, and the use cycle of the ion exchange resin is prolonged.

Description

technical field [0001] The invention relates to the technical field of ion exchange purification, in particular to an online resin recovery method in an ion exchange resin desalination system in an organic amine flue gas desulfurization process. Background technique [0002] The sintering process in the iron and steel industry will cause serious air pollution, therefore, it is necessary to install a flue gas desulfurization system to reduce SO 2 At present, more wet organic amine desulfurization processes are used, but the absorption of SO 2 At the same time, it also absorbs a large amount of SO 3 And acid gas such as HCl, the acid gas forms SO in the desulfurization solution 4 2- and Cl - On the one hand, the formed anions will affect the absorption and analysis performance of the desulfurization solution and affect the desulfurization efficiency of the desulfurization system; on the other hand, there are a large number of anions, especially Cl - It will aggravate the ...

AI Technical Summary

Problems solved by technology

However, since the content of iron, calcium, aluminum and other metal ions, suspended solids, silicon, oil, and organic matter in the organic amine desulfurization solution is much higher than the content of similar substances in the water to be treated in the traditional water treatment process, it is easy to quickly cause Contamination of the resin fails, so frequent resuscitation is required

However, the offline recovery method cannot meet the requirements of industrial production due to its poor operability and long time consumption.

In addition, ion exchange resin resuscitation in the prior art is carried out outside the ion exchanger, which easily causes resin abrasion and pulverization during the process of moving the resin, and most of the resuscitation fluids used are strong acid and strong alkali, and the resuscitation cost is relatively high

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