炼油厂蒸汽系统优化措施

蒸汽是影响全厂能耗的主要因素,蒸汽系统优化是炼油厂节能降耗的重点.某炼油厂单系列千万吨级炼油项目通过不断实施优化技术和管理措施,对全厂蒸汽系统持续优化,节能成效明显,取得了良好的经济效益.该厂通过实施催化裂化装置余热锅炉改造、优化流程提高热供料温度、降低汽轮机背压蒸汽压力、优化塔的工艺参数、优化动力锅炉运行方式等措施,节约蒸汽83.9 t/h,创造经济效益2.08×10^8 RMB￥/a,炼油蒸汽单耗由2009年的64.7 kg/t降至34.5 kg/t,降幅达46.67％,全厂炼油实际能耗降低108.02 MJ/t,实际综合能耗由2009年的2 830.41MJ/t降低至2 392.45MJ/t,降幅为15.47％.

Optimization measures for refinery steam system

Steam is an important factor affecting the refinery energy consumption, and the optimization of steam system is very critical for refinery energy saving and consumption reduction. This paper introduces the optimization measures of steam system in a refinery with a single-train capacity of over 10 million tons per year. Through implementation of optimized technologies and effective management measures, energy has been saved and good economic benefits have been achieved. By the revamping of waste heat boiler of catalytic cracking unit, optimization of process to raise feed temperature, reduction of pressure of back pressure steam of team turbine, revamping of heat supply for reboiler of de-isopentanizor of CCR, optimization of condensate recovery system, optimization of evacuation system operation of vacuum tower, etc, the total 83.9 t/h steam is saved, and the economic benefit from saving is 2.08×10^8 RMB￥/a. The unit steam consumption of the re- finery is reduced from 64.7 kg/t in 2009 to 34.5 kg,/t, which is 46.67%. The energy saving of the refinery is 108.02 MJ/t. The actual energy consumption of the refinery was reduced to 2 392.45 MJ/t from 2 830.41 MJ/t in 2009, which is a 15.47% reduction.