Regeneration method for resin in continuous electric desalting membrane reactor

An electrical desalination and resin technology, applied in the field of industrial water treatment, can solve the problems of high cost and increased operating voltage of the membrane stack, and achieve the effects of simple operation, reduced operating voltage and low cost

Inactive Publication Date: 2012-07-18
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] After the resin filled in the CEDI membrane stack fails, the operating voltage of the membrane stack increases, and it must be returned to the factory for repair or replacement, which will incur a large cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Regeneration method of resin in continuous electric desalination membrane stack

[0014] There are six sets of CEDI devices in the boiler make-up water workshop of 2×300MW generating units in Taiyuan Iron and Steel Energy Power Plant. After the operation fails, this method is used to regenerate, and the voltage is significantly reduced, and the effect is obvious. The following is an example of the No. 6 CEDI device to introduce the regeneration method:

[0015] The membrane stacks of No. 6 CEDI device are divided into 6 groups, the first group, the third group, and the fifth group each have 5 membrane stacks, the second group, the fourth group, and the sixth group each have 6 membrane stacks, a total of 33 membrane stacks.

[0016] The operating parameters at the initial stage of commissioning are as follows:

[0017] .

[0018] After the resin fails, the resistance of the membrane stack increases, the operating voltage increases, and the conductivity i...

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PUM

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Abstract

The invention provides a regeneration method for resin in a continuous electric desalting membrane reactor, belonging to the industrial water processing field. The regeneration method for resin in a continuous electric desalting membrane reactor has the advantages of simple operation and low cost. Moreover, the regeneration method can recover the desalting function of the resin, operating voltage is obviously reduced, and cost in returning a CEDI (continuous electric desalting ion) device to a factory to be maintained and exchanged is reduced. The regeneration method provided by the invention is characterized in that the regeneration method enhances the operating voltage and current, so that the resin can be regenerated under the strong electric field and large current condition.

Description

technical field [0001] The invention relates to a resin regeneration method in a continuous electric desalination membrane stack, belonging to the field of industrial water treatment. Background technique [0002] The reclaimed water is desalinated in the boiler feed water treatment system, using the full membrane method, microfiltration + first-stage reverse osmosis membrane + second-stage reverse osmosis membrane + CEDI (continuous electric desalination), and the final product water reaches the standard of desalinated water, which is used for in the production system. The function of CEDI membrane stack is to deeply desalinate RO (reverse osmosis) produced water to achieve high-purity water quality. The CEDI membrane stack adopts the unique process of filling resin in both the fresh water chamber and concentrated water chamber. The stack resistance reduces the probability of biofouling in the concentrated water chamber and improves the water recovery rate. [0003] Afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
Inventor 韩兴国姚克明王瑞红侯跃霞
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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