合成氨工艺原理(净化最终).doc

低温甲醇洗部分
一、概述--------------------------------------------------------------------------------------------------------------------
1、酸性气体的来源----------------------------------------------------------------------------------------------------
2、脱除酸性气体的必要性-------------------------------------------------------------------------------------------
3、脱除酸性气体的方法----------------------------------------------------------------------------------------------
4、甲醇的物理、化学性质------------------------------------------------------------------------------------------
5、低温甲醇洗的优、缺点------------------------------------------------------------------------------------------
二、理论基础-----------------------------------------------------------------------------------------------------------------
1、拉乌尔定律和亨利定律------------------------------------------------------------------------------------------
2、各种气体在甲醇中的溶解度------------------------------------------------------------------------------------
三、工艺过程及原理--------------------------------------------------------------------------------------------------------
1、脱水------------------------------------------------------------------------------------------------------------------
2、CO2、H2S的吸收-------------------------------------------------------------------------------------------------
3、富甲醇液的再生及H2、CO2、H2S的回收------------------------------------------------------------------
(1) 一级减压闪蒸------------------------------------------------------------------------------------------------------
(2) 二级减压闪蒸-----------------------------------------------------------------------------------------------------
(3) H2S组份的浓缩---------------------------------------------------------------------------------------------------
(4) 加热再生-----------------------------------------------------------------------------------------------------------
4、甲醇脱水蒸馏-----------------------------------------------------------------------------------------------------
四、我厂及同类