Fixed double-layer-bed ion exchange resin regenerating method and apparatus thereof

A technology of ion exchange resin and double bed, which is applied in the direction of ion exchange regeneration, ion exchange, ion exchange water/sewage treatment, etc. It can solve the problems of reducing equipment space utilization, unfavorable automatic control, and poor water quality. Achieve the effects of improving the quality of product water, facilitating program control and automation, and reducing the expansion space of backwashing

Inactive Publication Date: 2000-04-26
王廷生
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires a large hydraulic backwash every time. After the regeneration transformation is completed, a large backwash and stratification with water is required again. This not only increases the self-consumption of water, but also complicates the operation, which is not conducive to the realization of automatic control. There is a problem of countercurrent regeneration "chaotic layer"
Although the downstream method has no chaotic layer problem, the regeneration effect is poor, the water quality is not good, and the regeneration specific consumption is high.
In a

Method used

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  • Fixed double-layer-bed ion exchange resin regenerating method and apparatus thereof
  • Fixed double-layer-bed ion exchange resin regenerating method and apparatus thereof

Examples

Experimental program
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Effect test

Embodiment 2

[0040] A double-bed anion exchange column with a diameter of 2 meters, a column height of 3 meters, and a total resin height of 2 meters, of which the height of 201×7-SF strong base anion resin is 0.9 meters, and the height of D301-SC weak base anion resin is 1.1 meters.

[0041] According to the same method as in Example 1, using industrial caustic soda as a regeneration agent, the 0.4m 3 Industrial caustic soda is made into a solution with a concentration of 0.9% as a pre-regeneration liquid, and the double-bed resin is backwashed and stratified-pre-regeneration with a flow rate of 5.5m / h from bottom to top; after the pre-regeneration liquid is passed into , let stand for 25 minutes; then add 0.3m 3 Industrial caustic soda is made into a solution with a concentration of 2.0% as the regeneration solution, and the double-layer bed is regenerated at a flow rate of 3m / h; after the regeneration solution is passed through, continue to replace and rinse with water for 30 minutes; t...

Embodiment 3

[0043] A double-bed cation exchange column with a diameter of 2.2 meters, a column height of 4 meters, and a total resin loading height of 2.6 meters, of which 001×7-SF is 1.2 meters high and D113-SC is 1.4 meters high. The lower row is installed at the resin interface 0.2 meters above.

[0044] According to the same method as in Example 1, using industrial hydrochloric acid as a regeneration agent, the 1.3m 3 Industrial hydrochloric acid is made into a solution with a concentration of 1.0% as the pre-regeneration solution, and the resin is backwashed and stratified at a flow rate of 7.5m / h-pre-regeneration: After the pre-regeneration solution is passed through, let it stand for 25 minutes; then 1.2m 3 Industrial hydrochloric acid is made into a solution with a concentration of 2%, and the resin is regenerated at a flow rate of 4m / h; after the regenerated solution is introduced, it is replaced and rinsed with water for 40 minutes; followed by positive washing, the positive was...

Embodiment 4

[0045] The water source is river water, a double-layer anion exchange column with a diameter of 2.5 meters and a column section height of 4 meters. The height is 1.58 meters, and the lower row is at the resin interface.

[0046] According to the same method as in Example 1, using industrial caustic soda as a regeneration agent, the 0.6m 3 The industrial caustic soda is formulated into a pre-regeneration solution with a concentration of 0.9%, and the resin is pre-regenerated and backwashed and stratified at a flow rate of 5m / h: after the pre-regeneration solution is passed through, it is allowed to stand for 15 minutes; then the 0.5m 3 Industrial caustic soda is made into a solution with a concentration of 2.0% as the regeneration solution, and the resin is regenerated at a flow rate of 3.5m / h; then the water is replaced and rinsed for 25 minutes; finally, the positive wash is performed, and the parameters are: small positive wash flow rate 10m / h , time 5 minutes; medium posit...

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Abstract

The invention relates to a regeneration method of ion exchange resin in a fixed double-bed water treatment device and a water treatment device/regeneration device adopting the regeneration method. The regeneration method is composed of the following steps: that is, the resin is subjected to countercurrent and reverse flushing with dilute regeneration solution-pre-regeneration, the regeneration solution is used to stand to soak the resin, and the thick regeneration solution is used to perform countercurrent regeneration of the resin without top pressure, water The regeneration solution is replaced by countercurrent, and finally the resin is flushed forward step by step.

Description

technical field [0001] The invention relates to a method and device for regenerating ion exchange resin in a water treatment device, in particular to a method and device for regenerating fixed double-bed ion exchange resin. The double-bed ion exchange resins are weak ion exchange resins and strong ion exchange resins. Background technique [0002] Double-bed ion exchange resin water treatment device (hereinafter referred to as double-bed) has been widely concerned for its unique advantages since it came out. When using this kind of double-layer bed, in order to obtain good water quality, it is required that the strong and weak resins maintain a good separation state, that is, the strong and weak resins should have sufficient wet density difference to facilitate hydraulic backwashing and screening , to achieve the purpose of stratification. It is generally required that the wet true density difference of the positive double bed should be greater than 0.09, and that of the n...

Claims

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Application Information

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IPC IPC(8): B01J49/60C02F1/42
Inventor 王廷生
Owner 王廷生
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