The quench cooling system of ethylene plant had the problem of insufficient heat recovery.A lot of heat was recovered by the quench water system through cracking gas and consumed a lot of circulating water,which resulted in energy waste and energy consumption cost.For this kind of low-grade heat energy,the traditional method was to directly use it,but there were disadvantages of low utilization rate of heat energy and high cost.In this paper,it recoveredmore high-grade waste heatandreducedthe generation of low-grade waste heatby strengthening quench cooling oil system.Specifically,a quench oil was drawn as a heat source at the bot-tom of the process water vapor stripping tower,partially or completely replacing the bottom steam,and at the same time reducing the circulating water consumed by the quench water system.This measure had the double effect of saving steam and reducing the con-sumption of circulating water with small transformation work and the lowcost.
关键词
乙烯急冷系统/急冷油塔/急冷水塔/模拟/系统优化
Key words
ethylene quench system/quench oil tower/quench water tower/simulation/system optimization
维普
万方数据