夹点分析在原油常减压蒸馏换热网络的应用  

Application of pinch analysis in heat exchanger network of atmosphere-vacuum distillation for crude oil

作　　者：葛玉林[1] 杨洪源 沈胜强[1] 

机构地区：[1]大连理工大学能源与动力学院 [2]大连市建筑科学研究设计院,辽宁大连116021

出　　处：《热科学与技术》2007年第2期101-105,共5页Journal of Thermal Science and Technology

基　　金：辽宁省科技攻关项目(2005224001)

摘　　要：对常减压蒸馏过程的换热网络进行了夹点分析。得到了各热流体和冷流体在各自温度间隔的热负荷分布情况,绘制了组合曲线和总组合曲线。对于热流体,热端提供的热负荷较大,冷端提供的的热负荷较小,其中热物流减黏渣油(JNZY)对整个热负荷的贡献最大。对于冷流体,需要热负荷的冷流体主要是流体拔头油(BTY)和原油(YY),且集中在中低温度间隔内。组合曲线和总组合曲线说明换热网络热回收接近温差(ΔtHRAT)越小,回收的热量越大,需要的热公用工程和冷公用工程也越少,公用工程投资和冷热公用工程费用将减少,但是由于换热网络接近温差变小,整个换热网络的换热器面积将增大,从而增加了换热器投资,这表明在实际过程中要兼顾换热器等设备的投资成本。不同ΔtHRAT的换热网络,其夹点是变化的。Pinch analysis for heat exchangers network of Atmosphere-vacuum distillation for crude oil is implemented. Duty distributions of hot and cold stream in different temperature intervals are obtained. Composite curves and grand composite curves are plotted. For hot stream, hot end provides more heat duty than cold end. JNZY contributes most to the whole heat duty among all hot streams. For cold stream, the major streams needed heat duties are BTY and YY, and are mostly in the middle and bottom temperature intervals. The composite curves and grand composite curves show that smaller ΔtHRAT is, larger recovery heat is, smaller heating and cooling utilities are supplied, smaller capital of utility and cost of heating and cooling utility is, but larger area of heat transfer is needed due to the increase of ΔtHRATresult in increase of capital of heat exchangers. It shows that the capital of heat exchangers should be considered besides quantity of heat recovery. Pinch of heat exchangers network changes for different ΔtHRAT.

关 键 词：夹点分析 原油 常减压蒸馏 换热网络 

分 类 号：TQ083.4[化学工程]