Configuration and Capacity Calculation of Power-actuated Pressure Relief Valve in Thermal Power Plants

doi:10.11930/j.issn.1004-9649.201711200

Electric Power ›› 2018, Vol. 51 ›› Issue (7): 103-107.DOI: 10.11930/j.issn.1004-9649.201711200

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Configuration and Capacity Calculation of Power-actuated Pressure Relief Valve in Thermal Power Plants

ZHANG Chuanhu¹, CHEN Xuan², ZHANG Zhongzhou³, TIAN Shongfeng⁴, TANG Huifeng⁵, LIU Jianmin⁶, HU Weizu⁷, LU Huancheng⁸

1. Wuhan Huake Energy Environment Science & Technology Co., Ltd., Wuhan 430074, China;
2. Guangdong Yudean Group Co., Ltd., Zhuhai Power Plant, Zhuhai 519000, China;
3. Nanyang Yahekou Tianyi Power Generation Co., Ltd., Nanyang 474671, China;
4. North China Electric Power University, Baoding 071003, China;
5. Henan Huayushengda Special Equipment Inspection Technology Co., Ltd., Jiaozuo 542150, China;
6. Xi'an University of Technology, Xi'an 710082, China;
7. Anhui Association of Special Equipment, Hefei 230051, China;
8. Hubei Huakeruicheng Standardization Firm, Wuhan 430074, China

Received:2017-11-29 Revised:2018-03-24 Online:2018-07-05 Published:2018-07-31

Abstract

Abstract: The power-actuated pressure relief valve (PCV valve) equipped in the thermal power plant boiler is a vital equipment to provide overpressure protection for the boiler. However, in practice, many power plants do not pay enough attention to the configuration of the power drive discharge valve and do not always follow the requirements of ASME and the electric industrial standards which definitely brings hidden dangers to the boiler operation. This paper introduces the relevant standards on the PCV valve configuration, analyzes the existing problems in practice and proposes the solutions. By calculating the adverse effect of manual isolation ball valve with reduced diameter on the discharge capacity, the necessity and importance of properly configuring the PCV valve following the standards are emphasized.

Key words: thermal power plant, boiler, power-actuated pressure relief valve (PCV valve), configuration, manual isolation ball valve, discharge capacity

CLC Number:

TK223.6+2

ZHANG Chuanhu, CHEN Xuan, ZHANG Zhongzhou, TIAN Shongfeng, TANG Huifeng, LIU Jianmin, HU Weizu, LU Huancheng. Configuration and Capacity Calculation of Power-actuated Pressure Relief Valve in Thermal Power Plants[J]. Electric Power, 2018, 51(7): 103-107.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201711200

https://www.electricpower.com.cn/EN/Y2018/V51/I7/103

References

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Configuration and Capacity Calculation of Power-actuated Pressure Relief Valve in Thermal Power Plants

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