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一、概述 1、前言汽提法是国内外已大量采用的先进尿素生产工艺,汽提塔是该工艺流程中的关键设备之一。汽提塔里的汽提管,要承受一百几十大气压的压力,操作温度在整个流程中最高,氨与二氧化碳的分子比较低,操作稍有疏忽,容易造成局部缺氧,因此腐蚀环境比合成塔等设备都苛刻。在我院早期的中压联尿试验中,用φ32×2.5mm的SUS33不锈钢作汽提管,仅使用20天,正对着蒸汽入口的
First, an overview 1, Preface Stripping method is a large number of advanced urea production technology has been used at home and abroad, the stripper is the process of one of the key equipment. Stripper in the stripping tube, to withstand hundreds of atmospheric pressure, the operating temperature is highest in the entire process, ammonia and carbon dioxide molecules is relatively low, the operation a little negligent, likely to cause local anoxic, so the corrosive environment ratio Synthetic towers and other equipment are harsh. Early in our hospital in the pressure of urine test, with φ32 × 2.5mm SUS33 stainless steel for the stripping tube, only 20 days, facing the steam inlet