摘要
管程破裂是换热器压力泄放阀设计中最常见的一种超压工况。ASME相关换热器规范[1]中明确要求换热器需要配置足够泄放能力的泄压装置以避免超压导致的换热器内部损坏情况的发生,但并没有提供如何进行泄压装置的选型以及管程破裂工况下泄放量的计算方法。API RP 520 Part I[2]以及API RP 521[3]虽然提供了一些对于换热器管程破裂工况下PRV设计的指导方针,但这些方针太过于宏观而不能进行详细的计算或用于换热器超压泄放分析计算中。介绍了一种换热器管程破裂工况下安全阀泄放量的计算方法,解决了换热器低压侧安全阀的设计问题。
Heat exchanger tube rupture is one of the common over-pressure scenarios of pressure relief valve(PRV)design.ASME code indicates that heat exchanger shall be protected with a relieving device of sufficient capacity to avoid internal failure caused by over-pressure,but it does not provide any guidance on how to size a PRV and how to define the required relief load in case of tube rupture.API RP 520 Part I and API RP 521 do offer some guidance for the design of PRV in case of heat exchanger tube rupture,but they are too general to be used to perform a detailed calculation.This paper introduces a method to calculate the relief capacity of PRV in case of heat exchanger tube rupture,which solves the problems in the design of PRV on the low pressure side of heat exchangers.
出处
《石油化工设计》
CAS
2015年第2期10-12,5,共3页
Petrochemical Design
关键词
换热器
管程破裂
安全阀泄放量
Heat exchanger
Tube rupture
Relief capacity of PRV
