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Bypass electrolysis device and method for removing chloridion in water solution

An electrolysis device and chloride ion technology, applied in the field of water treatment, can solve problems such as difficult continuous and stable operation, high operating costs, electrochemical corrosion, etc., and achieve the effect of improving the efficiency of induced deposition

Inactive Publication Date: 2017-02-15
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the electrode reaction accompanied by gas generation, the ohmic resistance and energy consumption of the electrode / solution interface area increase, and the impurities in the treatment solution or the electrochemical corrosion of the metal electrode itself may form composite hydroxides or even oxidize during the electrolysis process. Dirt adheres to the surface of the electrode to passivate it, which makes it difficult to operate continuously or extend the working cycle. Stopping to clean or replace the working electrode makes the operating cost high.

Method used

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  • Bypass electrolysis device and method for removing chloridion in water solution
  • Bypass electrolysis device and method for removing chloridion in water solution
  • Bypass electrolysis device and method for removing chloridion in water solution

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Effect test

Embodiment 1

[0059] Take 18L of the solution to be treated, start the submersible pump 2, control the circulating water 100L / h, slightly open the water regulating valve to fix the split ratio of 0.12, and apply a voltage of 18-24V. The relationship between the concentration of chlorine ions in the circulating water and the treatment time is as follows image 3 . For the initial concentration of chloride ion is 55mgL -1 , the total hardness is (CaCO 3 Total) 220mgL -1 For raw water, the removal rate of chlorine ions in the flowing water under optimized test conditions is higher than 50%. After the 22V test, the pH value of the circulating water rose from 7.5 to above 9, the hardness dropped by 60%, and the current dropped from 0.37A to 0.21A. And obtain 2.16L of water flowing through the anode, its pH value is 2.9, and the chloride ion concentration is 239mgL -1 .

Embodiment 2

[0061] Take 18L of the solution to be treated, fix the voltage at 22V, start the submersible pump 2, control the circulating water flow of 100L / h, and control the water flow through the regulating valve so that the split ratio is 0, 0.08, 0.10, 0.12, 0.17. Under the conditions of different split ratios, the relationship between the concentration of chloride ions in the circulating water and the treatment time is as follows: Figure 4 . When the split ratio is 0.17, the removal rate is close to 70%.

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Abstract

The invention relates to a bypass electrolysis device and a method for removing chloridion in a water solution, in particular to a bypass anode and tube cathode assembly vertical type coaxial bypass electrolysis device, which belongs to the field of water treatment, and comprises an electrolysis mechanism, wherein the electrolysis mechanism comprises a power supply, a tubular bypass anode and a tubular cathode; the tubular bypass anode is coaxially sleeved by the tubular cathode; the tubular bypass anode and the tubular cathode are arranged in a way of enabling an axial direction of the tubular bypass anode to be vertical to the ground; an annular cavity is formed between the tubular bypass anode and the tubular cathode. According to the device provided by the invention, the in-vivo separation of a hydrogen ion and a hydroxide ion and the interception of high valent cationic can be realized, the induced deposition efficiency on electrode (cathode) metal hydroxide is improved, and particularly, due to hardness ion deposition, the bypass electrolysis device can remove temporary hardness and semipermanent hardness such as calcium bicarbonate and magnesium chloride in the water solution.

Description

technical field [0001] The invention relates to a split electrolysis device and method for removing chloride ions in aqueous solution, in particular to a vertical coaxial split electrolysis device with split anode and shell cathode, belonging to the field of water treatment. Background technique [0002] Chlorine-containing compounds are commonly used raw materials in industrial production and daily life, and are also the most abundant dissolved salts. Chloride ions in aqueous solution can destroy the passivation film on the surface of various metals and their alloys, which can easily cause various localized corrosion of metal equipment, and bring various troubles and hidden dangers to the normal operation of equipment, the realization of new processes and product quality. For example, the interaction between chlorine ions in circulating cooling water and oil field injection water and dissolved oxygen causes equipment corrosion. Bright coatings can only be obtained if the c...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/46109C02F1/4672
Inventor 李彦生杨迎菊王自博王俏李子辰
Owner DALIAN JIAOTONG UNIVERSITY