石蜡加氢精制装置能耗结构及节能措施

石蜡加氢精制装置操作能耗主要为电耗、蒸汽和燃料消耗3项，共占操作能耗的95％以上。为降低装置电耗．优化工艺，主要措施为：氢气一次通过工艺，停开循环氢压缩机；采用高效低功率的高速原料泵，减少升压耗电量：采用机械抽真空，降低抽真空蒸汽及汽提蒸汽；优化装置的伴热流程，延长单条伴热的有效长度；降低燃料气消耗．除提高加热炉效率外，延长催化剂在中低温反应阶段的运行时间。

Energy Consumption Structure and Energy-saving Measures for Wax Hydrofining Unit

The main energy consumption comprises electricity, steam and fuels in wax hydrofining unit, and these factors are more than 95% energy collectivity. In order to decrease electricity consumption and optimize process, the main measures include: recycle hydrogen compressor runs only at the moment of starting work or shutdown; high powered and tail-wagging pump is adopted; the vacuum jet is replaced by vacuum pump; the calefaction system is improved by extending steam calefaction line; increasing efficiency of heater and prolonging the running time of catalyst in low temperature state for decreasing gas consumption.