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Method for removing free chlorine from nickel chloride electrodeposition anolyte

A technology of anolyte and free chlorine, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of poor operating environment at the production site and poor dechlorination effect of anolyte, and achieve good dechlorination effect , low chlorine content, meet the effect of recycling

Inactive Publication Date: 2020-03-27
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a simple, low-cost, high-efficiency nickel chloride electrowinning process for the disadvantages of poor anolyte dechlorination effect and poor production site operating environment in the traditional nickel chloride electrowinning process. Method for removing free chlorine from anolyte

Method used

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  • Method for removing free chlorine from nickel chloride electrodeposition anolyte

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Effect test

Embodiment 1

[0020] A method for removing free chlorine from a nickel chloride electrowinning anolyte, the specific implementation process: the temperature is 80°C, the concentration of free chlorine is 400ppm, the pH is 1.2, and the volume is 1m 3 The nickel chloride electrowinning anolyte is forced into droplets to form a droplet with a radius of 1mm, and the nickel chloride electrowinning anode droplet passes through 10m 3 The cross-flow of the air and the anolyte droplet are fully mixed and contacted, and the air carrying the chlorine gas escapes to the gas-water separation device, the separated water phase is combined with the nickel chloride electrowinning anolyte, and the dechlorinated liquid enters the subsequent process for analysis and detection The free chlorine concentration of the liquid after dechlorination is 6ppm, and the removal rate of free chlorine is 98.5% through calculation.

Embodiment 2

[0022] A method for removing free chlorine from a nickel chloride electrowinning anolyte, the specific implementation process: the temperature is 80°C, the concentration of free chlorine is 413ppm, the pH is 2.0, and the volume is 1.2m 3 The nickel chloride electrowinning anolyte is forced to droplet to form a droplet with a radius of 2mm, and the nickel chloride electrowinning anode droplet passes through 20m 3 The cross-flow of the air and the anolyte droplet are fully mixed and contacted, and the air carrying the chlorine gas escapes to the gas-water separation device, the separated water phase is combined with the nickel chloride electrowinning anolyte, and the dechlorinated liquid enters the subsequent process for analysis and detection The chlorine gas concentration of the liquid after dechlorination is 5.5ppm, and the removal rate of free chlorine is calculated to be 98.7%.

Embodiment 3

[0024] A method for removing free chlorine from a nickel chloride electrowinning anolyte, the specific implementation process: the temperature is 80°C, the concentration of free chlorine is 448ppm, the pH is 2.2, and the volume is 1.5m 3 The nickel chloride electrowinning anolyte is forced into droplets to form a droplet with a radius of 3mm, and the nickel chloride electrowinning anode droplet passes through 50m 3 The air cross-flow is fully mixed with the anolyte droplets, and the air carrying chlorine gas escapes to the gas-water separation device, the separated water phase is combined with the nickel chloride electrowinning anolyte, and the dechlorinated liquid enters the subsequent process, and the analysis and detection results The chlorine gas concentration of the liquid after dechlorination is 4.5ppm, and the removal rate of free chlorine is calculated to be 99%.

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Abstract

The invention discloses a method for removing free chlorine from nickel chloride electrodeposition anolyte. The method comprises the following steps of: under the action of a forced force field, allowing nickel chloride electrodeposition anolyte to perform sufficient droplet to form droplets with the radius of 1-3 mm, and performing cross-flow contact with a certain amount of air; and according toa gas-liquid interface equilibrium concentration principle, performing the balanced reaction of free chlorine in a solution towards an analysis direction, so that the concentration of the free chlorine in the nickel chloride electrodeposition anolyte is reduced, and the purpose of removing the free chlorine from the nickel chloride electrodeposition anolyte is achieved. The concentration of the chlorine in the anolyte after the chlorine is removed is below 6ppm, the whole technological process is good in dechlorination effect, the removal rate of the free chlorine is 98.5% or above, the removal rate of the free chlorine in the anolyte is increased, the chlorine content of the anolyte is low, no chlorine smell exists, the requirement for cyclic utilization of the anolyte is met, the dechlorinated anolyte reaches the ideal state of cyclic utilization, and the purposes that the field operation environment is clean and friendly are achieved.

Description

technical field [0001] The invention belongs to the technical field of nickel chloride electrowinning technology, and in particular relates to a method for removing free chlorine from nickel chloride electrowinning anolyte. Background technique [0002] At present, the commonly used dechlorination methods of light brine at home and abroad include blast dechlorination method, vacuum dechlorination method, and chemical dechlorination method. [0003] The blowing dechlorination method can usually remove the free chlorine in the light brine to 5-6ppm, but the purity of the released chlorine gas is poor and cannot enter the chlorine gas main pipe. Generally, it is made into NaClO after absorbing with NaOH. Due to the large amount of chlorine gas removed, it needs to consume a large amount of caustic soda to absorb the released chlorine gas, and the sale of the sodium hypochlorite produced should also be considered. The vacuum dechlorination method can usually remove the free chl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/12
CPCC02F1/461C02F2101/12
Inventor 张晗郁洪波郭金权席海龙张建玲王书友高晓婷陈彩霞李全王钦路思阳马天飞
Owner JINCHUAN GROUP LIMITED
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