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Measuring method of trace-amount ethanolamine in high-purity water of generating station

A technology of ethanolamine and high-purity water, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of incomplete and accurate measurement of ethanolamine concentration, and achieve the effect of fast test speed, good reproducibility and high sensitivity

Inactive Publication Date: 2012-11-14
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

These methods can only roughly test the concentration of ethanolamine, but cannot completely and accurately measure the concentration of trace ethanolamine in the high-purity water of the power plant

Method used

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  • Measuring method of trace-amount ethanolamine in high-purity water of generating station
  • Measuring method of trace-amount ethanolamine in high-purity water of generating station
  • Measuring method of trace-amount ethanolamine in high-purity water of generating station

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] The working conditions of the ion chromatograph of the present invention are shown in Table 1. It adopts a cationic analysis column, a cationic suppressor, an online eluent generator and an eluent to form a test system that can realize the complete separation of the two peaks of ammonia and ethanolamine. figure 1 It is the ion chromatographic separation diagram of the test system operating under the working conditions in Table 1, where peak 1 in the chromatogram is sodium (0.5mg / L), peak 2 is ammonia (0.1mg / L), and peak 3 is ethanolamine (2.0mg / L), peak 4 is potassium (1.0mg / L), peak 5 is magnesium (0.5mg / L), and peak 6 is calcium (1.0mg / L). figure 2 The serial standard solution concentrations and curve equations of the standard curve in the standard curve are shown in Table 2. This series of standard solutions is a mixed standard solution of ammonia...

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Abstract

The invention relates to a measuring method of a basifier ethanolamine for a nuclear power station secondary circuit system and a fuel electric plant feed water system. The measuring method comprises the following steps of: testing an electric conductivity peak value when ethanolamine reach a peak value by taking an ion chromatograph as a testing means and by utilizing a specific instrument working condition; drawing a standard operation curve by taking electric conductivity pair concentration of peak-peaks, and adopting a quadratic regression equation method; and directing calculating the concentration of the ethanolamine in an unknown water sample so as to obtain the exact concentration of the ethanolamine through software of an instrument workstation according to the electric conductivities of the measured peak-peaks. The measuring method provided by the invention has the advantages that the operation is simple and convenient and rapid, the test is exact, the precision is high, the reproducibility is good, so that a simple and practicable method for quantitative testing of the trace-amount ethanolamine in high-purity water of a generating station.

Description

technical field [0001] The invention relates to a method for measuring ethanolamine, an alkalizing agent used in a secondary circuit system of a nuclear power plant and a water supply system of a thermal power plant, in particular to a method for measuring trace amounts of ethanolamine in high-purity water of a power plant. Background technique [0002] Ethanolamine, English name ethanolamine (ETA for short), another name hydroxyethylamine, molecular formula HOCH 2 CH 2 NH 2 . The aqueous solution of ethanolamine is alkaline; when the temperature is lower than 300 °C, the steam-water partition coefficient is less than 1, and the thermal stability is good. It is a suitable alkalization agent for the secondary circuit system of nuclear power plants, and it is also used to inhibit the low-temperature steam-water two-phase flow in thermal power plants. Effective alkalizing agent for accelerated corrosion by phase flow. At present, at home and abroad, the concentration of eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 曹松彦常旭红孙本达李瑛黄万启
Owner XIAN THERMAL POWER RES INST CO LTD
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