摘要
在保障装置平稳运行的前提下,尽量降低能源的消耗已成为炼油装置运行的主旨,而在国内采用热高分流程的柴油加氢装置运行中,热高分气/循环氢换热器的换热效果会出现周期性的下降,影响装置的整体运行能耗。因此,合理提高热高分气/循环氢换热器的传热效率并保证在较高的传热效率下运行,能有效地回收热高分气热量,降低装置的能耗。依据该换热器各参数实际运行数值,从各影响因素中找出关键的运行参数进行分析,采取相应对策,保证换热器长期在较高的传热效率下运行。注水周期由每月一次更改为每周一次,原先注水依据热高分与冷高分压力差,现更改为参考循环氢换后的温度趋势,能保证该换热器每周均在较高的传热效率下运行,可节能1 927 MJ/h,避免了部分热高分气的热量流失。
Nowadays, reducing the energy consumption of refinery process units has become an important target on condition of reliable operation. Whereas the heat exchange efficiency between hot high-pressure sepa- rator gas and recycle hydrogen in the heat exchanger of diesel hydrotreating units decreased periodically, which had an impact on the energy consumption of the units. Therefore, it has become a key topic how to low- er the unit energy consumption through increasing the heat exchange efficiency between hot high-pressure sepa- rator gas and recycle hydrogen while running the unit under higher efficiency and recovering the heat from hot high-pressure separator gas effectively. On the basis of the analysis of the operating parameters of heat ex- changer, the critical operating parameters were selected from impact factors and analyzed. Corresponding strat- egies were proposed to keep the operation of the exchanger at high heat exchange efficiency. Water was injec- ted once a week instead of once a month based upon the temperature trend after heat exchanger differential pressure between hot high-pressure separator and cold high-pressure separator. These the operation of head exchanger at higher heat transfer efficiency and save energy by 1927 MJ/h. the heat loss into the atmosphere of the hot high-pressure separator was partly avoided. instead of the could ensure In addition,
出处
《炼油技术与工程》
CAS
2014年第1期54-56,共3页
Petroleum Refinery Engineering
关键词
热高分气
循环氢
效率
换热器
传热
结晶
hot high-pressure separator gas and recycle hydrogen, efficiency, heat exchanger, heattransfer, crystallization
