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Online hydrogen conductivity meter hydrogen exchange column additional error test system and method

A technology of hydrogen conductivity and additional error is applied in the field of additional error inspection system of on-line hydrogen conductivity meter hydrogen exchange column, which can solve the problem of inability to timely and effectively monitor the deterioration of water vapor quality, unqualified additional error of hydrogen exchange column, and hidden dangers of generator set safety. To ensure the accuracy of measurement, improve measurement efficiency, and improve assembly efficiency

Pending Publication Date: 2022-05-06
大唐秦岭发电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] If the result of the on-site water sample inspection at that time is qualified, but when the water vapor quality of the unit deteriorates, that is, the actual hydrogen conductivity of the water sample increases, the additional error of the hydrogen exchange column may not be qualified. At this time, the additional error of the exchange column If it is a negative value, the measured value of the hydrogen conductivity is too small, which covers the real change of the water quality, and cannot timely and effectively monitor the deterioration of the water vapor quality, which brings a huge safety hazard to the generator set

Method used

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  • Online hydrogen conductivity meter hydrogen exchange column additional error test system and method
  • Online hydrogen conductivity meter hydrogen exchange column additional error test system and method
  • Online hydrogen conductivity meter hydrogen exchange column additional error test system and method

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Embodiment 1

[0054] The following is a detailed description of an online hydrogen conductivity meter hydrogen exchange column additional error checking method provided by the present invention, including the following steps:

[0055] Step 1, with a certain concentration of ammonium chloride (NH 4 C1) solution is perfused in the standard solution bottle 5.

[0056] Step 2. Turn the first three-way valve 2 tangentially to the standard conductivity meter 1, and the second three-way valve 3 tangentially to discharge. Start and adjust the adjustable micropump 4 and adjust the power of the pump so that the indicated value of the standard conductivity meter 1 is around 0.30 μS / cm. After the indicated value of the standard conductivity meter 1 is stable, record the indicated value κ of the standard conductivity meter 1 b1 , to keep the power of the adjustable micropump 4 .

[0057] Step 3, tangentially discharge the first three-way valve 2, and tangentially discharge the second three-way valve 3...

Embodiment 2

[0070] Taking the hydrogen exchange column of the main steam hydrogen conductivity meter of a power plant as an example, the test results of this test method are shown in Table 4.

[0071] Table 4 Additional error of main steam hydrogen conductivity table hydrogen exchange column

[0072]

[0073] It can be seen from the test results that with the increase of the hydrogen conductivity of the water sample, the absolute value of the additional error of the exchange column is not a fixed value, but increases with the increase of the hydrogen conductivity. Use a water sample with a hydrogen conductivity of 0.064μS / cm for inspection, and the additional error δ of the hydrogen exchange column in the online hydrogen conductivity meter J It is qualified, and the water samples with hydrogen conductivity of 0.100μS / cm, 0.303μS / cm, 0.405μS / cm and 0.657μS / cm are tested, and the online hydrogen conductivity meter hydrogen exchange column has an additional error δ J are unqualified. Th...

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Abstract

According to the online hydrogen conductivity meter hydrogen exchange column additional error test system and method disclosed by the invention, a solution in a standard solution bottle is added into demineralized water through an adjustable micro pump, and the power of the adjustable micro pump is adjusted for multiple times to obtain a plurality of water samples with different anion concentrations; after a water sample passes through the standard hydrogen exchange column and the detected online hydrogen exchange column at the same time, the conductivity of the water sample passing through the standard hydrogen exchange column and the detected online hydrogen exchange column is measured through the standard conductivity meter, and then the additional error of the detected online hydrogen exchange column is calculated according to the measured conductivity value. And the maximum value of the additional error is taken as the additional error of the detected online hydrogen exchange column, so that the additional error of the hydrogen exchange column of the online hydrogen conductivity meter can be comprehensively and accurately detected.

Description

technical field [0001] The invention relates to the field of on-line chemical instrument measurement and calibration of a water vapor circulation system in a power plant, in particular to a system and method for additional error checking of a hydrogen exchange column of an on-line hydrogen conductivity meter. Background technique [0002] Hydrogen conductivity reflects the overall content of impurity anions in the water vapor system of a power plant, and can continuously monitor harmful substances in the water vapor system. It is one of the main means to ensure the safe and economical operation of power generating units, and achieves the purpose of indirectly monitoring the corrosion of thermal equipment in the water vapor system. The hydrogen conductivity measurement is the conductivity measured after the water sample to be tested passes through the hydrogen-type cation exchange resin and then enters the conductivity cell of the online conductivity meter. In this process, t...

Claims

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Application Information

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IPC IPC(8): G01N27/06
CPCG01N27/06
Inventor 周潮谭娟白阳晨刘宏侠李学东牛晓奇闫敏张倩玉
Owner 大唐秦岭发电有限公司
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