Electrochemical oxidation method of sulfite in desulfurized fly ash

A technology of sulfite and desulfurization ash, which is applied in the field of electrochemistry, can solve the problems of electrochemical oxidation methods of desulfurization ash that have not yet been studied, and achieve the effects of low additional pollutants, environmentally friendly materials, and simple steps

Pending Publication Date: 2021-03-16
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochemical oxidation method of desu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 0.5g of desulfurization ash into a 250mL electrolytic cell, add 100mL of water, the mass ratio of desulfurization ash to water is 1:200, stir with a glass rod to disperse the desulfurization ash evenly in the water, add potassium hydroxide solution (0.5mol / L) and 0.05mL of 0.1mL ammonia-ammonium chloride solution (pH=10) to adjust the pH of the turbid solution to 10;

[0025] (2) Put the prepared pair of graphite electrode plates of 100mm×50mm×3mm into the electrolytic cell so that the faces of the two graphite electrode plates of 100mm×50mm face each other and are submerged in the mixed solution to the greatest extent. Continue electrolysis for 1 hour under the condition of 30V, and stir once every 20 minutes during this period to fully react the sulfite in the desulfurization ash;

[0026] (3) Pour the turbid solution of electrochemically treated desulfurized ash and water into the suction filter funnel for suction filtration to separate the solid from the l...

Embodiment 2

[0030] (1) Weigh 0.5g of desulfurization ash into a 250mL electrolytic cell, add 100mL of water, the mass ratio of desulfurization ash to water is 1:200, stir with a glass rod to disperse the desulfurization ash evenly in the water, add potassium hydroxide ( 0.5mol / L) solution and 0.05mL of 0.1mL ammonia-ammonium chloride solution (pH=10) to adjust the pH of the turbid solution to 10;

[0031] (2) Put the prepared pair of graphite electrode plates of 100mm×50mm×3mm into the electrolytic cell so that the faces of the two graphite electrode plates of 100mm×50mm face each other and are submerged in the mixed solution to the greatest extent. Continue for 2 hours under the condition of 30V, and stir once every 20 minutes during this period to fully react the sulfite in the desulfurization ash;

[0032] (3) Pour the electrochemically treated desulfurized ash and water turbid liquid into the suction filter funnel for suction filtration to separate the solid and liquid;

[0033] (4) ...

Embodiment 3

[0036] (1) Weigh 0.5g of desulfurization ash into a 250mL electrolytic cell, add 100mL of water, the mass ratio of desulfurization ash to water is 1:200, stir with a glass rod to disperse the desulfurization ash evenly in the water, add potassium hydroxide solution (0.5mol / L) and 0.1mL ammonia-ammonium chloride solution (pH=10) to adjust the pH of the turbid solution to 10;

[0037] (2) Put the prepared pair of graphite electrode plates of 100mm×50mm×3mm into the electrolytic cell so that the faces of the two graphite electrode plates of 100mm×50mm face each other and are submerged in the mixed solution to the greatest extent. Continue for 3 hours under the condition of 30V, and stir once every 20 minutes during this period, so that the sulfite in the desulfurization ash can fully react;

[0038] (3) Pour the electrochemically treated desulfurized ash and water turbid liquid into the suction filter funnel for suction filtration to separate the solid and liquid;

[0039] (4) P...

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PUM

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Abstract

The invention provides an electrochemical oxidation method of sulfite in desulfurized fly ash, and belongs to the technical field of electrochemistry, aiming at solving the problems in the existing desulfurized fly ash treatment technology. The method comprises the following steps: (1) putting desulfurized fly ash and water into an electrolytic cell in proportion, uniformly mixing, adding an ammonia-ammonia chloride electrolyte solution, and adjusting the pH value of a turbid liquid by using an alkali; (2) putting electrodes at the two ends of the electrolytic cell, and carrying out electrolysis at stirring conditions; (3) filtering a turbid solution obtained after electrolysis, drying a filtrate. According to the method for treating sulfite in desulfurized fly ash by adopting the electrochemical method, the advantages are that: the operation is simple, no extra waste liquid or waste is generated, and the oxidation efficiency is high.

Description

technical field [0001] The invention belongs to the field of electrochemical technology, in particular to an electrochemical oxidation method of sulfite. Background technique [0002] The control of sulfur dioxide emissions from factories and mines has led to an increase in the output of desulfurization by-product desulfurization ash year by year. If it is used in the field of building materials, but the unstable component calcium sulfite in the desulfurization ash seriously affects the quality of the product, and sulfur dioxide will be discharged into the atmosphere at high temperature, causing secondary pollution and affecting its utilization in the field of building materials; If it is used in concrete, the chloride ions in the desulfurization ash will cause the corrosion of steel bars, resulting in cracking of concrete, which restricts its application in reinforced concrete. A large amount of desulfurization ash cannot be used reasonably, which not only takes up land re...

Claims

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Application Information

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IPC IPC(8): C25B1/18
CPCC25B1/18
Inventor 陈洪彬牛文杰郭客苑庆波高源金磊孙长胜崔广建
Owner ANSTEEL GRP MINING CO LTD
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