Analysis and discussion on measuring status of online chemical instruments in ultra supercritical units

SU Yao

doi:10.19666/j.rlfd.202002041

English

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Analysis and discussion on measuring status of online chemical instruments in ultra supercritical units

Thermal Power Generation Vol. 49, Issue 12, Pages: 158-163(2020)

更新时间：2025-09-28

- Analysis and discussion on measuring status of online chemical instruments in ultra supercritical units
- 作者机构：
  
  中国神华能源股份有限公司国华电力分公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202002041
  CLC： O657.7+5;TM621.8
- Published Online：01 December 2020，
  
  Published：2020
- 稿件说明：
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SU Yao. Analysis and discussion on measuring status of online chemical instruments in ultra supercritical units[J]. Thermal Power Generation, 2020, 49(12): 158-163.
DOI：

SU Yao. Analysis and discussion on measuring status of online chemical instruments in ultra supercritical units[J]. Thermal Power Generation, 2020, 49(12): 158-163. DOI： 10.19666/j.rlfd.202002041.

摘要

通过对某发电公司下属8家电厂的16台超超临界机组在线化学仪表的配置现状进行调研统计

并对这些在线化学仪表测量的准确性进行检验。针对准确性检验结果

分析了超超临界机组所配备的在线电导率表、在线p H表、在线钠表、在线溶解氧表和在线硅表的各类误差来源及影响因素。提出为提高在线化学仪表测量准确:应由取得电厂化学仪表检验校准培训合格证书的人员

按照电力行业标准规定

采用符合标准要求的移动式在线化学仪表检验装置进行定期检验及校准。超超临界机组对各项水汽控制指标要求极高

因此在线化学仪表配备率必须达标

还应按GB/T 12145—2016要求安装在线氯表

防止热力设备和汽轮机发生氯离子腐蚀。

Abstract

The configuration status of online chemical instruments of 16 ultra supercritical units in 8 power plants which belong to a power generating company was investigated statistically

and the measurement accuracy of these online chemical instruments was detected. According to the inspection results

the error sources and influencing factors of online conductivity analyzer

online p H analyzer

online sodium analyzer

online dissolved oxygen analyzer and online silicon analyzer were analyzed. It proposed that

to improve the accuracy of on-line chemical instrument measurement

the personnel who have obtained the qualification certificate of chemical instrument inspection and calibration in power plant should be employed to carry out regular inspection and calibration by using the mobile on-line chemical instrument inspection device which meets the standard requirements according to the standard regulations of power industry. The ultra-supercritical units have extreme high requirements in each water vapor control index

so the availability rate of the on-line chemical instruments must satisfy the standard

and the on-line chlorine meter should be installed according to the GB/T 12145—2016 standard

to prevent chloride corrosion in thermal equipments and steam turbines.

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