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Mixed resin and preparation method thereof

A technology of mixed resin and ion exchange resin, which is applied in the field of mixed resin and its preparation, can solve problems such as copper corrosion and internal cooling water conductivity exceeding the standard, and achieve the effect of strong operability and simple and easy preparation method

Inactive Publication Date: 2010-12-01
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since the condensed water adjusts the pH value by adding ammonia, when the condensed water has a high pH value (that is, when the ammonia content in the condensed water is high), on the one hand, the conductivity of the internal cooling water will exceed the standard; On the other hand, since the stator bar inside the generator is usually made of copper, and copper is very sensitive to ammonia, it is very easy to cause copper corrosion

Method used

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  • Mixed resin and preparation method thereof
  • Mixed resin and preparation method thereof

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preparation example Construction

[0034] According to the method for preparing the mixed resin of the present invention, the gel-type ion exchange resin is preferably a gel-type styrene-based ion exchange resin.

[0035] The working exchange capacity of the OH type ion exchange resin, Na type ion exchange resin and H type ion exchange resin and the volume ratio among the OH type ion exchange resin, Na type ion exchange resin and H type ion exchange resin are not particularly limited.

[0036] Preferably, the working exchange capacity of described OH type ion exchange resin, Na type ion exchange resin and H type ion exchange resin and the volume ratio of described OH type ion exchange resin, Na type ion exchange resin and H type ion exchange resin make The molar ratio of the ion exchange group in the OH type ion exchange resin, the ion exchange group in the Na type ion exchange resin and the ion exchange group in the H type ion exchange resin is 1: 0.1-0.8: 0.08-0.75 .

[0037] More preferably, the working exc...

preparation example 1

[0052] Carry out pretreatment to cation resin A by following method:

[0053] The cation resin A that rinses clean with desalinated water is soaked 8 hours with the NaOH solution of 5% by weight for twice the concentration of this cation resin volume, then rinses with desalinated water until the water quality is transparent and clear and free of phenolphthalein alkalinity; After soaking in HCl solution with a concentration twice the volume of the cation resin of 5% by weight for 8 hours, rinse with desalinated water until the water quality is transparent and clear, the methyl orange indicator is added dropwise and the indicator turns yellow and the conductivity is ≤ 1.0 μS / cm.

preparation example 2

[0055] This preparation example is used for transforming H-type ion exchange resin into Na-type ion exchange resin.

[0056] Adopt the H type ion-exchange resin obtained by preparation example 1, soak 24 hours with the NaOH solution of 5% by weight with twice the concentration of the resin volume, then rinse with desalinated water until the water quality is transparent and clear, without phenolphthalein alkalinity and conductivity ≤1.0μS / cm, thus transforming H-type ion exchange resin into Na-type ion exchange resin.

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Abstract

The invention relates to a mixed resin, comprising OH-type ion exchange resin, Na-type ion exchange resin and H-type ion exchange resin, wherein the OH-type ion exchange resin, the Na-type ion exchange resin and the H-type ion exchange resin are gel-type ion exchange resin. The invention also provides a preparation method thereof, comprising the step of mixing the OH-type ion exchange resin, the Na-type ion exchange resin and the H-type ion exchange resin. The mixed resin is used for treating cold water in a generator to keep the pH value of the cold water above 7.5 for long time, and bring no adverse impact to the conductivity of the cold water and no corrosion to the inner parts of the generator.

Description

technical field [0001] The invention relates to a mixed resin and a preparation method thereof. Background technique [0002] During the operation of the generator, due to energy consumption, part of the energy is converted into heat energy, which makes the temperature of the rotor, stator and other components rise, which in turn leads to the aging of the insulation winding, the decline in output, and even the burning of the motor. Therefore, it is necessary to cool the components inside the generator. However, since the inner cooling water of the generator works in the environment of a high-voltage electric field, compared with the ordinary cooling water, the inner cooling water of the generator should not only meet the requirements of no corrosion and scaling, but also have good electrical insulation properties . However, oxygen, carbon dioxide, etc. in the air will inevitably be dissolved during the working process of the cooling water of the generator, so that the pH v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J43/00
Inventor 孙月李立峰李占元陆成骏庄文军陈超时文俊
Owner CHINA SHENHUA ENERGY CO LTD
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