Ejecting method of feed liquid in exchange column in mortar recovery deionization process

Abstract

The invention relates to an ejecting method of a feed liquid in an exchange column in a mortar recovery deionization process. The method comprises steps of: adding a certain amount of decolorized feed liquid into an exchange column for a deionization treatment; after adding the feed liquid, blowing and ejecting the feed liquid in the exchange column by utilizing compressed air until all feed liquid in the exchange column is ejected out; and implanting water for soaking. Because the compressed air does not mix with the feed liquid and has a small specific gravity, the invention can substantially increase blowing and ejecting speed and will not dilute the feed liquid to avoid adding burden on a sequent dewatering operation, so as to save energy.

Description

technical field [0001] The invention relates to a method for ejecting material liquid in an exchange column in the mortar recovery and deionization process, especially for the recovery of silicon cutting mortar. Background technique [0002] At present, in the mortar recovery process after silicon wafer cutting, the decolorized material liquid is deionized through the anion-yang exchange column. The remaining feed liquid in the column will continue to be ejected with water, so that the water entering the exchange column will mix and dilute with the feed liquid, the liquid topping process will be lengthened, the water content of the feed liquid will be increased, and energy consumption will be increased for the subsequent dehydration process. Contents of the invention [0003] The purpose of the present invention is to provide a method for ejecting the feed liquid in the exchange column in the mortar recovery and deionization process without diluting the feed liquid. [00...

AI Technical Summary

Problems solved by technology

[0002] At present, in the mortar recovery process after silicon wafer cutting, the decolorized material liquid is deionized through the anion-yang exchange column. The remaining feed liquid in the tank will continue to be ejected with water, so that the water entering the exchange column will mix and dilute with the feed liquid, the process of ejecting the liquid will be lengthened, the water content of the feed liquid will be increased, and the energy consumption will be increased for the subsequent dehydration process