加氢装置高温高压热交换器密封结构性能探析

Analysis and Discussion of Properties of Sealing Structures for Heat Exchanger Subject to High Temperature and High Pressure in Hydrogenation Unit

根据加氢装置操作条件,从密封原理、结构特点、失效原因及经济性评价等方面对加氢装置中常用的高温高压热交换器密封结构进行详细分析。对比分析结果表明,在目前我国加氢装置中,首选Ω环密封和隔膜式密封,其次选用螺纹锁紧环密封,不宜选用八角金属环垫密封。

The seal principle,structural characteristics,failure reasons,and economy of seal structures used in heat exchangers,subject to high temperature and high pressure in hydrogenation unit,were analyzed and discussed according to the operation conditions of hydrogenation unit.The results of analysis and comparison showed that preferred Ω ring seal,diaphragm seals,followed by the selection thread locking ring seal for use,octagonal metallic ring cushion seal is not recommended.