摘要
针对中国石化塔河炼化有限责任公司炼油厂循环水系统,通过调节循环水系统给回水压力,以提高循环水压差以及降低循环水综合能耗,考察不同工况下循环水压力比(β)对循环水系统运行及温度变化的影响。结果表明:随着β的下降,各装置循环水回水温度均会有所上升,整个过程硫磺装置温度变化较小;当β小于1.61后,焦化装置、加氢装置、循环水回水总线的温度斜率变化较大,出现飞温现象且不可控,当β小于1.62时,则不利于其他装置的稳定运行;通过循环水同步降压能有效降低循环水的负荷量,减少能耗,当β减小至1.55时,加氢装置高压回水点压力接近于0 MPa;当β小于1.55时,该处循环水回水压力为负数,形成负压腔,其他支线循环水窜入该区域,需使用抽真空泵或管道增压泵才可以维持运行;在管道脉冲实验时,当β为1.62时,为最稳、最优运行点,在考虑循环水同步降压时,需综合考虑循环水运行、换热情况、余压上塔等综合能耗,建议将β控制在1.62~1.67,以保证节能平稳运行。
The effects of circulating water pressure ratio(β)on circulating water system operation and temperature change under the different working conditions were investigated for the circulating water system in Tahe Refining and Chemical Co Ltd of SINOPEC.The results showed that:asβdecreased,the circulating water return temperature of each unit would increase,and the temperature change of sulfur unit was small throughout the process;whenβwas less than 1.61,the temperature slope of coking unit,hydrogenation unit and circulating water return bus had relatively bigger changes,and a flying temperature state had occurred and was uncontrollable,whileβless than 1.62 was not conducive to the stable operation of other units;the adoption of the circulating water synchronous pressure reduction technic could effectively reduce the amount of circulating water load and reduce energy consumption.Whenβwas reduced to 1.55,the circulating water return pressure of hydrogenation unit was close to 0 MPa;whenβwas less than 1.55,it was negative,which had formed a negative pressure chamber,causing the circulating water from other branches scurried into the area,therefore a vacuum pump or pipeline booster pump must be used to maintain operation;the pipeline pulse experiment had shown that whenβwas 1.62,the most stable and optimal operation condition could be reached.When considering the synchronous pressure reduction of circulating water,it was necessary to consider the circulating water operation,heat exchange situation,residual pressure on the tower and other comprehensive energy consumption to find out the optimal point,and it was recommended to maintainβat 1.62-1.67 to ensure the energy-saving and smooth operation.
作者
袁亮
韩会亮
衡永宏
王新勇
YUAN Liang;HAN Hui-liang;HENG Yong-hong;WANG Xin-yong(Tahe Refining&Chemical Co Ltd,SINOPEC,Kuqa 842000,China)
出处
《石化技术与应用》
CAS
2021年第5期338-341,共4页
Petrochemical Technology & Application
关键词
循环水压力比
同步降压
换热
增压管道泵
流体脉冲
负压腔
circulating water pressure ratio
synchronous depressurization
heat exchange
booster pipe pump
fluid pulse
negative pressure chamber
