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Ion exchange resin regeneration degree test method

A technology of ion exchange resin and testing method, which is applied in the field of ion exchange resin regeneration test, and can solve problems such as different calculation conditions and inapplicability

Active Publication Date: 2015-01-14
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0028] The existing method for determining the maximum regeneration degree of resin is suitable for the calculation of the limit value in ion exchange water treatment, but not for the calculation of the actual regeneration degree after the operation of resin regeneration, the calculation conditions of the two are different

Method used

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  • Ion exchange resin regeneration degree test method
  • Ion exchange resin regeneration degree test method

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Embodiment

[0115] This embodiment provides a method for testing the degree of regeneration of resin and a measurement test for the accuracy of the method.

[0116] Measurement of cation exchange resin regeneration error:

[0117] Take an appropriate amount of sodium-type cation exchange resin for fine treatment of mixed beds, and completely convert the sodium-type resin into hydrogen-type according to the "DL / T519-2004 Acceptance Standards for Ion-exchange Resins for Water Treatment in Thermal Power Plants". The two resins are mixed, and the hydrogen form rate in the mixed resin sample is measured by the above-mentioned method for measuring the degree of regeneration. The measurement process is as follows, and the measurement parameters and results are shown in Table 1 and Table 2.

[0118] 1. Determination of hydrogen exchange capacity:

[0119] (1) Take an appropriate amount of regenerated cation exchange resin, wash the resin with pure water, remove external moisture, weigh 2 parts ...

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Abstract

The invention relates to an ion exchange resin regeneration degree test method. The method comprises: employing pure water to wash cation exchange resin subjected to regeneration treatment, then passing an excess NaCl solution through the resin under a dynamic condition, collecting the eluate, measuring the amount of hydrogen ions therein and calculating the hydrogen type group capacity QH of the cation exchange resin, transforming the cation exchange resin to sodium type, and measuring the complete exchange capacity QT; or reacting anion exchange resin subjected to regeneration treatment with excess strong monoacid, calculating the oxyhydrogen type group capacity QOH of the anion exchange resin, transforming the anion exchange resin to oxyhydrogen type, and measuring the maximum regeneration capacity to serve as the complete exchange capacity Qwhole of the anion exchange resin; calculating the regeneration degree eta of the ion exchange resin according to the formula of eta cation=QH / Qwhole*100% or eta anion=QOH / Qwhole*100%, with the unit of QH, Qwhole and QOH all being mmol / g. The method provided by the invention can realize quantitative measurement of the regeneration degree of high-speed mixed bed operation resin, and can perform quantitative determination on the resin regeneration effect.

Description

technical field [0001] The invention relates to a method for testing the regeneration degree of an ion exchange resin, belonging to the field of chemical analysis and detection methods. Background technique [0002] The high-speed mixed bed is an important unit of the condensate polishing system in the power plant, and the regeneration degree of the high-speed mixed bed resin is an important factor affecting the quality of the effluent. Therefore, by optimizing the regeneration process of high-speed mixed-bed fine treatment resin, improving the regeneration level of resin and ensuring a high enough regeneration degree of operating resin, it has always been the goal pursued by the high-speed mixed-bed water treatment process for condensate polishing in power plants, especially For the high-speed mixed-bed ammoniation operation mode, the regeneration degree of the operating resin determines the success or failure of the high-speed mixed-bed ammoniation operation. [0003] Res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 李永立王应高星成霞金绪良赵荧翟雅
Owner STATE GRID CORP OF CHINA
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