又是until句(CAT硫化程序)? Start injection of anhydrous ammonia at the maximum pump rate. Two hours after ammonia injection, start wash water to the reactor effluent exchanger train. Check the water of the high pressure separator for ammonia break through. Reduce the ammonia injection until the normal ammonia level in the recycle gas is achieved. The ammonia injection remains in operation until 100% of the normal feed is processed. 想听听大家对标红句的理解,这一步是怎样的顺序? :loveliness:查看更多6个回答 . 3人已关注