直接换热常规流程的改进及分析
发布时间：2018-07-14 15:52
【摘要】：针对直接换热(DHX)常规流程重接触塔塔底凝液直接进脱乙烷塔塔顶造成重接触塔塔顶回流重烃含量多、冷凝吸收效果差、丙烷回收率低的缺陷。通过增设脱乙烷塔塔顶回流罐得到两种改进流程:(1)改进流程Ⅰ,脱乙烷塔塔顶回流罐分离液相作重接触塔和脱乙烷塔塔顶回流;(2)改进流程Ⅱ,脱乙烷塔塔顶回流罐分离气相冷却后作重接触塔塔顶回流,分离液相作脱乙烷塔塔顶回流。并针对不同的原料气压力及气质贫富,对两种改进流程进行调整,分别得到适用于中压凝析气、低压油田伴生气和高压凝析气丙烷回收的DHX改进流程。并通过HYSYS软件对3种流程进行模拟对比分析,结果表明改进流程Ⅰ对于中压和高压凝析气丙烷回收率均很高(99%),但对于油田伴生气改进效果不明显,并且改进流程Ⅰ对高压凝析气进行丙烷回收时能耗较高。而改进流程Ⅱ在不同原料气气质工况下均表现出很高的回收率(99%),且能耗较低,是一种回收率高、适应范围广、节能高效的丙烷回收流程。因此可得结论:改进流程Ⅱ是3种流程中的最佳丙烷回收流程,但改进流程Ⅰ在某些特殊条件下也是一种值得参考的流程。
[Abstract]:Aiming at the defects of direct heat transfer (DHX) process, such as heavy hydrocarbon content in reflux, low recovery rate of propane and low recovery rate of propane caused by direct contact column bottom condensate directly into deethane tower top, the refluxing heavy hydrocarbon content of refluxing tower top of heavy contact tower is more, the condensation absorption effect is poor, and the recovery of propane is low. Two improved processes were obtained by adding a top reflux tank for deethane tower: (1) improved flow 鈪，
本文编号：2122154
[Abstract]:Aiming at the defects of direct heat transfer (DHX) process, such as heavy hydrocarbon content in reflux, low recovery rate of propane and low recovery rate of propane caused by direct contact column bottom condensate directly into deethane tower top, the refluxing heavy hydrocarbon content of refluxing tower top of heavy contact tower is more, the condensation absorption effect is poor, and the recovery of propane is low. Two improved processes were obtained by adding a top reflux tank for deethane tower: (1) improved flow 鈪，
本文编号：2122154
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