Method for recycling and reusing ionic exchange regenerated liquid

A technology of ion exchange and ion exchange column, which is applied in the field of ion exchange regenerated liquid recovery and utilization, can solve the problems of difficult treatment, high ammonia nitrogen content, and high cost, and achieve the effects of reducing waste water discharge, large economic benefits, and saving washing water

Inactive Publication Date: 2019-01-15
CHINA MOLYBDENUM
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Problems solved by technology

[0010] The ion exchange process produces a large amount of wastewater in the analysis and regeneration process, especially after the resin analysis and regeneration requires a large amount of water to be washed to near neutrality, a large amount of wastewater is generated in this process, and the cost of wastewater treatment is currently very high, especially the above-mentioned wastewater The content of ammonia nitrogen in the medium is high, the treatment is difficult and the cost is high

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  • Method for recycling and reusing ionic exchange regenerated liquid

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Embodiment Construction

[0023] The present invention can be explained in more detail by the following examples, and the purpose of disclosing the present invention is intended to protect all changes and improvements within the scope of the present invention, and the present invention is not limited to the following examples;

[0024] A kind of ion exchange regenerated liquid recycling method described in conjunction with accompanying drawing comprises the following steps:

[0025] 1) When the ion exchange column is regenerated, operate as a single column. After analysis, wash the ion exchange column with tap water for half an hour, with a flow rate of 4m³ / h; The washing water can flow out smoothly, and stop backwashing after 45 minutes. The total time is 1 hour and 15 minutes, and the shared water is 5 m³;

[0026] 2) After washing with water, the water in the ion exchange column is full, and the liquid level in the ion exchange column is lowered to 15-20cm above the resin layer;

[0027] 3) Open th...

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Abstract

The invention provides a method for recycling and reusing the ionic exchange regenerated liquid. The regenerated liquid is recycled and stored after ionic exchange resin is regenerated, and serves aswashing water in the next separation, due to the acid-base neutralization reaction, the pH value of the in-column solution can reach the required value rapidly, a great amount of wastewater being drained out can be reduced while the washing water amount is saved, and the method can produce huge economic benefits in the situation that the environmental production trend is more and more important.

Description

Technical field: [0001] The invention relates to the technical field of an ion exchange process, in particular to a method for recycling an ion exchange regeneration liquid. Background technique: [0002] Ion exchange is a special adsorption process, that is, the process of exchanging ions in the solution with ions on the ion exchanger. [0003] In the production process of APT, weakly basic anion exchange resin is used to selectively adsorb metatungstate in acidic solution to realize the separation of tungsten and SO 4 2- , Cl - For the separation of anions, use NaOH solution to analyze and prepare sodium tungstate solution. It mainly includes two steps of acid adjustment transformation and ion exchange. The main reaction formula of the process is as follows: [0004] 1. Transformation response: [0005] (NH 4 ) 10 h 2 W 12 o 42 + 2H 2 SO 4 = (NH 4 ) 6 h 2 W 12 o 40 + 2(NH 4 ) 2 SO 4 + 2H 2 o [0006] 2. Ion exchange: [0007] (1) Adsorption: 2R ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J49/00C02F1/66
CPCB01J49/00C02F1/66
Inventor 琚成新龙锦刘德智杜开亮李晓宇贾伟
Owner CHINA MOLYBDENUM
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