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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 Low cost, low secondary pollution, and less demand for consumables

Active Publication Date: 2019-04-12
BAIYIN YUANDIAN TECHNOLOGY CO LTD
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  • 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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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 an industrial water dechlorination method. The industrial water dechlorination method comprises the specific steps as follows: an electrolytic cell is prepared, and an anode chamber, an intermediate chamber and a cathode chamber which are independent and are sequentially distributed from an anode and a cathode are established between a positive pole and a negative pole ofthe electrolytic cell by utilizing two groups of anion exchange membranes through which chloride ions selectively penetrate; industrial water to be treated is injected into the intermediate chamber, achloride ion-free solution is added to the cathode chamber, and a saturated acidic sodium chloride solution or a chlorine removal agent containing suspension is added into the anode chamber; voltageis continuously loaded to the positive pole and the negative pole of the electrolytic cell, and after the chloride ion concentration meets the treatment requirements, the loaded voltage is removed, and dechlorination of the industrial water is completed. According to the above method, the unique intermediate chamber for chlorine removal is formed based on the electrolytic cell and the anion exchange membranes through which the chloride ions selectively penetrate, so that the industrial wastewater can retain ions which can be recycled while the chlorine ions are removed, the selectivity of thedechlorination process is improved, the cost of dechlorination is reduced, and the resource recycling rate 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 Applications(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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