A mixed-bed anion and cation resin separation method in a condensate polishing system
A technology of condensate polishing and anion-yang resin, which is applied in the direction of chemical instruments and methods, ion exchange, ion exchange regeneration, etc., can solve the problems of power station steamer sewage deviation, short operation period of mixed bed, large amount of wastewater discharge, etc. Achieve the effect of reducing wastewater discharge, reducing chlorine leakage and stabilizing water quality
Active Publication Date: 2019-09-17
JIANGSU NUCLEAR POWER CORP
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Problems solved by technology
[0005] 2. Problems in the system
[0010] Due to the above problems in the system, there are cation resins in the anion resins, and there are anion resins in the cation resins. After the acid and alkali are fed, these residual resins will be converted into invalid types and participate in the system operation, which will lead to a short operation period of the mixed bed and a low regeneration frequency. High, the amount of wastewater discharge is large, and the chloride ions brought in by the anion resin during regeneration will be released into the secondary circuit system, causing the sewage of the steam generator in the power station to deviate from the
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[0058] (1) Pour resin: Fill 1.6 cubic meters of inert resin into the anion-yang resin separation filter, pour the resin from the mixed bed through pipeline A into the anion-yang resin separation filter, and the resin state is mixed with anion-yang resin. To remove the resin storage filter from the middle layer, pour the resin in the middle layer (the ratio of yin and yang resin is 1:1) into the separation filter of yin and yang resin.
[0059] (2) The first resin scrubbing and backwashing: in order to remove the impurities adsorbed by the resin, scrub the resin for the first time (valve I and pipeline inlet), compressed air pressure 0.25Mpa 20min, backwash (valve H and pipeline water inlet), 6.94kg / s for 10min, adjusted to 14.72kg / s within 15min and lasted for 80min, then dropped to 5.83kg / s for 60min. The sample water is clarified and the backwash is stopped.
[0060] (3) Resin enters alkali: add the step of sending the resin into the anion resin regeneration filter through ...
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The invention belongs to the technical field of separation and control of Yin and Yang resin, and particularly relates to a method for separating Yin and Yang resin in mixed beds of a condensate polishing system. Aiming at the defects in the prior art, the invention aims to provide the method for separating the Yin and Yang resin in the mixed beds of the condensate polishing system, by which the separation rate of the Yin and Yang resin in the condensate polishing mixed beds for a nuclear power plant is improved, the running period is prolonged, and high-quality water is ensured to be supplied to a secondary circuit. The method provided by the invention has the benefits that the separation rate of the Yin and Yang resin is improved from original about 95 percent to 99.9 percent, and the cross pollution is avoided; the quality of the water in the secondary circuit is stable, the chlorine leakage situation is reduced, and the fluctuation is reduced; the running period of a filter is prolonged, the acid and alkali consumption is reduced, and the wastewater discharge amount is reduced.
Description
technical field [0001] The invention belongs to the technical field of separation control of anion and yang resins, and in particular relates to a method for separating anion and yang resins in a mixed bed of a condensate polishing treatment system. Background technique [0002] There are five columns of mixed beds in the condensate polishing treatment, which are two-layer mixed beds of mid-pumping regeneration. Regeneration means that the resin loses its ability to exchange ions after a period of desalination operation. At this time, acid, alkali or salt can be used to restore the exchange ability. This process of restoring the exchange ability of the resin is called resin regeneration. [0003] The mixed bed of condensate polishing treatment is filled with 14.6 cubic meters of resin, the ratio of yin and yang to resin is 2:1, the regeneration method is center pumping, and there are three regeneration filters: yin and yang resin separation filter (cylindrical, diameter 2.6m...
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IPC IPC(8): B01J49/08B01J49/60B01J49/53B01J49/57
Inventor 杨笑宇王旭初赵怀阔王伟李连海
Owner JIANGSU NUCLEAR POWER CORP