A Method for Reducing Fat Mixing in Condensed Water Polishing Regeneration System

Abstract

The invention discloses a method for reducing mixed resin of a condensate polishing and regenerating system. The regenerating system adopts an extraction method or is modified based on the extraction method. The system at least comprises a cation regenerating tower, an anion regenerating tower, a resin storage tower, an associated pipe and a corresponding valve. Mixed resin mainly refers to anion resin contained in cation resin inside the cation regenerating tower. The method comprises the steps of conducting regenerating and conventional well-flushing on cation resin in a cation regenerating tower, wherein conventional well-flushing is performed after acid feeding regenerating, replacing, scrubbing and backflushing are performed; after cation resin inside the cation regenerating tower is completely sedimentated, and anion resin above the cation resin is conveyed to the anion regenerating tower through a mixed resin conveying pipe located at the portion 8-12 cm above an interface of the cation resin and a plurality of programmed switches and pneumatic valves installed on the pipe. The method has the advantages that the condensate polishing mixed bed resin regeneration can be improved, the polishing mixed bed water outlet quality is remarkably improved, periodically-produced water quantity is prolonged, the technological processes are simple, the effect is good, and the method is easy to implement.

Description

technical field [0001] The invention relates to a method for reducing fat mixing in a condensate polishing regeneration system, and belongs to the technical field of an automatic control system. Background technique [0002] The mixed bed for condensate polishing generally adopts external regeneration, and the resin in the mixed bed is transported to a special regeneration system. According to the structure of the anion-yang resin separation tower, it is generally divided into three regeneration methods: "medium pumping method", "high tower method" and "cone bucket method". The early regeneration system mostly used the "center pumping method" for regeneration. The principle was to use the density difference between the positive and negative resins in the fine treatment, and separate them in the positive regeneration tower (CRT) by backwashing. After the separation, the positive resin remained in the positive regeneration tower (CRT). , the anion resin is transported to the ...

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Problems solved by technology

Since there is no separation tower with a special design and structure (CRT also serves as a separation tower), the separation effect is poor compared to the "high tower method" and "cone bucket method". In the actual application process, the CTR cation resin is often mixed with some anion resins, and this part of the anion resins is completely converted into chlorine-type resins during the regeneration process of the cation resins, and finally sent to the fine treatment mixed bed. The impact is great. When the boiler water is treated with sodium hydroxide, it will seriously affect the hydrogen conductivity of the boiler water. In order to ensure that the hydrogen conductivity of the boiler water is qualified, it is necessary to open a large boiler row or withdraw the failed fine treatment mixed bed, resulting in heat loss and water replenishment of the unit. As the rate rises, the cycle water production volume of the fine treatment mixed bed decreases, the number of regenerations increases, the consumption of regenerated acid and alkali increases, and the amount of wastewater treatment increases

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