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A kind of industrial water dechlorination method

A technology for dechlorination of industrial water, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of low selectivity of dechlorination technology for industrial water, waste of resources, high cost of dechlorination, etc., to achieve Improve the effect of poor dechlorination effect, power saving and high dechlorination efficiency

Active Publication Date: 2021-08-24
BAIYIN YUANDIAN TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for dechlorination of industrial water. According to the characteristics of the working conditions of dechlorination of industrial water, a method for dechlorination of industrial water with high selectivity for the removal of chloride ions is designed, which solves the problem of the existing industrial water dechlorination. The selectivity of dechlorination technology is not high, the waste of resources is serious, and the cost of dechlorination is too high

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  • A kind of industrial water dechlorination method
  • A kind of industrial water dechlorination method
  • A kind of industrial water dechlorination method

Examples

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Effect test

Embodiment 1

[0046] In the present embodiment, a kind of treatment scheme for the industrial waste water not containing sulfate ion is provided, and it is specifically as follows:

[0047] Prepare an electrolytic cell, the internal volume of the electrolytic cell, and between the anode and the cathode of the electrolytic cell, use two sets of anion exchange membranes that are selectively permeable to chloride ions to construct mutually independent and sequentially distributed along the direction from the anode to the cathode. The anode chamber, intermediate chamber and cathode chamber; inject industrial water to be treated into the intermediate chamber, and add a chloride-free solution in the cathode chamber, and add sodium chloride saturated acid solution in the anode chamber; When the voltage is applied, the concentration of chlorine ions meets the treatment requirements, and the applied voltage is removed, and the dechlorination of industrial water is completed.

[0048] Wherein, the an...

Embodiment 2

[0054] Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that: a feeding electrode for monitoring the concentration of chloride ions in industrial water is installed in the intermediate chamber; The concentration of chloride ions in the solution in the middle chamber becomes smaller and decreases step by step.

[0055] Wherein, the voltage loaded between the anode and the cathode is adjusted as follows with the change of the ion concentration of the solution in the intermediate chamber:

[0056] When the chloride ion concentration is 0.3-0.8g / L, the current density corresponding to the loading voltage is 1.5-4.5mA / cm 2 ;

[0057] When the chloride ion concentration is 0.8-2g / L, the current density corresponding to the loading voltage is 4-10mA / cm 2 ;

[0058] When the chloride ion concentration is 2-4g / L, the current density corresponding to the loading voltage is 10-25mA / cm 2 ;

[0059] When the chloride ion concentration is 4-10g / L, the c...

Embodiment 3

[0063] In the present embodiment, a kind of detachment treatment method for the industrial water system containing sulfate ion is provided, and it is specifically as follows:

[0064] Prepare an electrolytic cell, the internal volume of the electrolytic cell, and between the anode and the cathode of the electrolytic cell, use two sets of anion exchange membranes that are selectively permeable to chloride ions to construct mutually independent and sequentially distributed along the direction from the anode to the cathode. The anode chamber, intermediate chamber and cathode chamber; inject industrial water to be treated in the intermediate chamber, and add a solution without chloride ions in the cathode chamber, and add a suspension containing dechlorination agent in the anode chamber; When the voltage is applied, the concentration of chlorine ions meets the treatment requirements, and the applied voltage is removed, and the dechlorination of industrial water is completed.

[00...

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Abstract

The invention relates to a method for dechlorination of industrial water, which is specifically implemented as follows: an electrolytic cell is prepared, and between the anode and the negative electrode of the electrolytic cell, two groups of anion exchange membranes that are selectively permeable to chloride ions are used to construct mutually independent and The anode chamber, the intermediate chamber and the cathode chamber are distributed sequentially along the direction of the anode pointing to the cathode; the industrial water to be treated is injected into the intermediate chamber, and a chloride-free solution is added to the cathode chamber, and a saturated acidic solution of sodium chloride or Suspension containing dechlorination agent; voltage is continuously applied to the anode and anode of the electrolytic cell, and the concentration of chlorine ions reaches the treatment requirement, and the voltage is removed, and the dechlorination of industrial water is completed. The above method, based on the electrolytic cell and the anion exchange membrane with selective permeability to chloride ions, forms a special intermediate chamber for chlorine removal, so that the industrial wastewater can retain the recyclable ions to the greatest extent while removing chloride ions, and improve The selectivity of the dechlorination process is improved, the cost of dechlorination is reduced, and the recycling rate of resources is improved.

Description

technical field [0001] The invention relates to the field of water dechlorination purification, in particular to a method for dechlorination of industrial water. Background technique [0002] In the production process of chemical industry, hydrometallurgy and other industries, wastewater with high chloride ion content is often produced. These chlorine-containing wastewater, on the one hand, affects the recycling of water resources and the recycling of other resources in the wastewater, resulting in a waste of resources and increasing the operating costs of industrial production; on the other hand, it will also affect the production equipment and equipment. Pipelines, etc. cause considerable corrosion damage, reducing the service life of equipment and pipelines. [0003] As far as the prior art is concerned, reverse osmosis (preparation of pure water), ion exchange, or precipitation method is often used to remove chloride ions in aqueous solution to reduce the content of chl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/12
CPCC02F1/46104C02F1/4672C02F2101/12C02F2201/46115C02F2201/46135C02F2209/29
Inventor 申鸿志
Owner BAIYIN YUANDIAN TECHNOLOGY CO LTD
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