通过HTRI软件模拟研究解决渣油加氢装置火炬热放空问题

STUDY ON LOWERING TEMPERATURE OF HOT RELEASING IN RESIDUUM HYDROTREATING UNIT BY HTRI SIMULATION

在部分渣油加氢装置设计中,在热低压分离器顶部设安全阀,其泄放温度高达360℃左右,而系统火炬管网的设计温度通常在260℃左右,因此需要在装置内将高温的泄放气体冷却到260℃以下后再出装置。通过HTRI传热软件模拟计算,对几种冷却方案从经济上和易实施的角度上进行对比分析,最终优选出在装置的放空分液罐内嵌水冷却器的冷却方案。在放空管线上加翅片管或循环水套管冷却的方案适用于系统火炬放空线。

The releasing temperature of safety valves on the top of hot low pressure separator is about 360 ℃, but the design temperature of flare pipes is usually bellow 260 ℃. Available methods are needed to decrease the releasing temperature from 360 ℃ to 260 ℃. The HTRI software is used to simulate several cooling schemes, which are compared and analyzed in economy and feasibility. We may draw conclusions that the scheme of embedding the cooling exchangers inside the flare drum of unit is preferred and the schemes of fin pipes and double pipes are fit for installing on flare pipes outside unit.