Treatment system for waste lead-acid storage battery electrolyte

Abstract

The invention discloses a treatment system for a waste lead-acid storage battery electrolyte. The system comprises a pressure filter for removing broken impurities and large particulate matters in theelectrolyte; the electrolyte is preheated through a preheater; the electrolyte enters triple-effect evaporation after being preheated by the preheater, and the concentration of an acid solution is increased to 50% from about 20% after the electrolyte is subjected to the triple-effect evaporation; the electrolyte enters a multiple-effect evaporator after being subjected to the triple-effect evaporation, and the concentration of the acid solution is increased to 70% from 50% after multiple-effect evaporation; after the electrolyte is subjected to the multiple-effect evaporation for increasing the concentration, a centrifugal machine performs centrifugal desalting; the treated electrolyte returns to a buffer tank again to carry out the next procedure of concentration increasing evaporation;acid becomes industrial sulfuric acid by increasing the acid concentration from 70+ / -2% after being treated with a concentration increasing evaporator; and crystal substances separated twice through the centrifugal machine are conveyed to a crystal substance storage tank. The boiling point of the sulfuric acid in a negative pressure state is reduced, so that the steam energy consumption can be reduced and the production cost can be reduced; and meanwhile, the sulfuric acid can become the industrial acid by increasing the concentration from 20-50% through the multiple-effect evaporation, so that the utilization value of the sulfuric acid is improved.

Description

technical field [0001] The invention relates to the field of electrolyte treatment, in particular to a treatment system for the electrolyte of waste lead-acid batteries. Background technique [0002] my country has become the country with the largest production and use of lead-acid batteries in the world. The output of lead-acid batteries in my country accounts for 1 / 3 of the world's output, and at this stage, the annual scrap of lead-acid batteries in my country has reached more than 2 million tons. The electrolyte in lead-acid batteries accounts for about 20-25%. Most of the acid will be deposited during the dismantling process of waste lead-acid batteries. If it is not handled properly or dumped randomly, it will seriously pollute the soil and water sources, and directly endanger the human body. healthy. [0003] At the same time, because the concentration of the electrolyte is low, it has no direct use value; because of its harmfulness, it cannot be discharged at will....

AI Technical Summary

Problems solved by technology

[0004] Although the CN107670315A technology is a sulfuric acid concentration technology, it cannot guarantee the smooth operation of the system due to the many impurities and heavy metal ions contained in the battery electrolyte

And this technology does not make full use of the waste heat of steam condensate

At the same time, this technology has many power facilities, large energy consumption and high production cost.

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