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国家质检总局于2006年10月24日就关于尿素合成塔出料管结构设计提出如下意见:为加强尿素合成塔安全监察工作,国家质检总局于2005年8月24日印发了《关于进一步加强尿素合成塔生产使用检验工作的通知》(国质检特函[2005]689号),提出尿素合成塔顶部合成物料出口插入管的管端应与塔顶内壁齐平,避免形成气相空间死区的结构要求。近期,一些单位来函反映采用此结构的合成塔不能满足水溶液全循环法生产尿素的工艺要求,对此,经研究,提出以下意见:按照生产工艺的要求,对采用水溶液全循环法
AQSIQ on October 24, 2006 on the urea synthesis tower discharge tube structure design made the following observations: In order to strengthen the safety supervision of urea synthesis tower, AQSIQ issued in August 24, 2005 “on further Strengthen the production of urea synthesis tower inspection notice ”(Guojianchan special letter [2005] No. 689), put forward the top of urea synthesis reactor outlet tube inserted into the tube should be flush with the inner wall of the tower to avoid the formation of gaseous space to die District structure requirements. Recently, some units of the letter reflects the use of this structure of the synthesis tower can not meet the requirements of the full cycle of aqueous urea production process requirements, this study, made the following observations: In accordance with the requirements of the production process, the use of aqueous solution cycle