th.2024.04.019]
点击复制

LNG储罐压力安全阀泄放量的计算探讨(PDF)

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: Research on calculation of relieving capacity of LNG tank pressure relief valve

Author(s):: MA Guoyin; WANG Naimin; DUN Zhangjing; et al; （Offshore Oil Engineering Co. Ltd., Tianjin 300461, China)

Keywords:: LNG Tank; pressure relief valve; relieving capacity; discharge coefficient; fitting formula

摘要:: 基于API和GB规范，对LNG储罐的泄放量计算方法进行总结并比较不同。分别对API和厂家指导手册就公制和美制单位下的储罐压力安全阀的泄放量计算方法进行详细介绍，拟合排放系数关于绝对压力比的计算公式，结果表明拟合公式计算结果与厂家计算值相近。基于某实际工程项目应用，将规范、指导手册、拟合公式计算结果相比较，结果具有较好的一致性。通过对不同规范及厂家标准的比较和计算，可增强工程设计人员对储罐和压力安全阀泄放量的进一步认识，并提供计算指导。

Abstract:: Based on API and GB specifications, the calculation methods for relieving capacity of LNG storage tank were summarized and compared. The calculation methods of relieving capacity for storage tank pressure relief valve in SI units and UCS units were introduced in detail according to API and the manufacturer’s handbook, and the calculation formula for the absolute pressure ratio of the discharge coefficient was fitted. The results showed that the calculation results of the fitting formulas were similar to those calculated by the manufacturer. In addition, a certain engineering project was applied to compare the calculation results of the specification, manufacturer handbook and the fitting formula, which have good consistency. It can enhance the engineering designer’s further understanding of the relieving capacity of storage tanks and pressure safety valves, and provide calculation guidance.

[1] API 2000-2020: Venting atmosphere and low-pressure storage tanks[S]. Washington. 2020.

[2] API 521-2020: Pressure-relieving and depressing system[S]. Washington. 2020.

[3] NFPA 59A-2019: Standard for the production, storage, and handling of liquefied natural gas[S]. Washington. 2019.

[4] 中国石油天然气集团公司，中国石油化工集团公司.液化天然气接收站工程设计规范:GB 51156-2015[S].北京：中国计划出版社, 2015.

[5] 刘浩, 周永春. LNG低温储罐压力安全系统设计[J]. 化工设计, 2007, 17(1): 7-10.

[6] 刘书华. 浅议LNG低温储罐安全阀泄放量的确定[J]. 化工设计, 2011, 21(6): 16-17.

[7] 周琳琳, 刘庆胜. LNG储罐压力控制系统设计[J]. 石油工程建设, 2016, 40(5): 39-41.

[8] 贾保印, 纪明磊, 刘禹岑. LNG储罐安全阀选型探讨[J]. 山东化工, 2017, 5(46): 117-119.

[9] BS EN 1473-2016: Installation and equipment for liquefied natural gas-design of onshore installations[S]. Brussels. 2016.

[10] ISO 28300-2008: Petroleum, petrochemical and natural gas industries-Venting of atmospheric and low-pressure storage tanks[S]. Switzerland. 2008.

[11] 全国石油天然气标准化技术委员会.液化天然气设备与安装陆上装置设计:GB/T 22724—2022[S]. 2022.

[12] 全国石油天然气标准化技术委员会.液化天然气（LNG）生产、储存和装运:GB/T 20368—2021[S]. 2021.

备注/Memo:: 收稿日期：2024-02-07 第一作者：马国印（1993—），男，河南渑池人，硕士研究生，仪控工程师，研究方向为仪表专业相关工作。

更新日期/Last Update: 1900-01-01