Method for recycling failed vanadium electrolyte

A technology of electrolyte and solution, which is applied in the field of vanadium batteries, can solve problems such as inability to achieve recycling, cumbersome and complicated processes, etc., and achieve the effect of easy operation and simple process

Active Publication Date: 2017-02-22
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, the process of this method is cumbersome and complicated, and it cannot achieve 100% recovery of vanadium in the spent vanadium electrolyte.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Using the chemical titration method, the vanadium ion concentration C in the invalid vanadium electrolyte was measured 1 1.5mol / L, average valence M 1 It was +3.8; the sulfate concentration Cs in the invalid vanadium electrolyte was measured by gravimetric method 1 It is 4.3mol / L; the volume V of the invalid vanadium electrolyte is measured 1 It is 20L. Concentration of vanadium ions in the regenerated electrolyte C 2 1.6mol / L, sulfate concentration Cs2 It is 4.4mol / L. Therefore, according to the formula n 1 =V 1 ×C 1 ×|M 1 -3.5|Calculate the amount n of the required vanadium sulfate substance 1 is 9mol, according to the formula V 2 =(V 1 ×C 1 +2×V 1 ×C 1 ×|M 1 -3.5|) / C 2 Calculate the volume V of the regenerated electrolyte 2 is 30L, according to the formula n 2 =V 2 ×Cs 2 -V 1 ×Cs 1 -3×n 1 The amount of substance required to calculate the sulfuric acid was 19 mol. Finally, according to the calculation results, add 9 mol of vanadium sulfate and 1...

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Abstract

The invention provides a method for recycling failed vanadium electrolyte. The method includes steps of confirming vanadium ion concentration C1, averaged valence state M1 of vanadium ion and sulfate radical concentration Cs1 in the failed vanadium electrolyte; according to the volume ratio of the failed vanadium electrolyte, determining the quantity n1 of the vanadyl sulfate or vanadium sulphate as required; according to the vanadium ion concentration C2 and sulfate radical concentration Cs2 required by the regenerated vanadium electrolyte, confirming the volume V2 of the regenerated vanadium electrolyte and the quantity n2 of the vitriolic material as required; and then adding water and adjusting the volume of the obtained solution to V2, and thereby obtaining the regenerated vanadium electrolyte. Through recycling the recycled vanadium electrolyte, the electrolyte is regenerated; the recycle rate is up to 10%; moreover, the method is simple in process and easy to operate.

Description

technical field [0001] The invention relates to the field of vanadium batteries, in particular to a method for recycling spent vanadium electrolyte. Background technique [0002] Vanadium batteries are considered to be one of the most promising large-scale energy storage batteries because of their independent output power and capacity, large power and capacity, long cycle life, high energy efficiency, good deep charge and discharge performance, and high safety performance. , attracting more and more attention. With the continuous circulation of vanadium batteries, the concentration and valence of vanadium ions in the positive and negative electrolytes do not match. When the utilization rate of the electrolyte does not meet the design requirements, a new vanadium electrolyte needs to be replaced. A depleted electrolyte. With the large-scale utilization of vanadium batteries, it is necessary to recycle a large number of spent vanadium electrolytes. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/00
CPCH01M8/008Y02W30/84
Inventor 陈勇
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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