毕业论文-年产40万吨合成氨脱碳工段工艺设计.doc

年产40万吨合成氨脱碳工段工艺设计 [摘要]脱碳工段是合成氨工程中必不可少的工段之一，二氧化碳吸收塔和溶液再生塔是脱碳过程中不可缺少的塔设备。 本文权衡众多合成氨脱碳方法之利弊，最终选择碳酸丙烯酯脱碳法。首先进行工艺流程分析并根据工艺参数及有关标准进行二氧化碳吸收塔和解析塔内的物、热量衡算；其次就二氧化碳吸收塔、溶液再生塔等设备利用物理吸收机理、传质传热方程、溶液物性数据等方面的知识进行塔体的总体结构设计和计算，设计出二氧化碳吸收塔的塔径为2.1m，塔高为m，二氧化碳解吸塔塔径2.4m，塔高m；然后对二氧化碳吸收和解塔进行了必要的强度校核；最后对脱碳工段车间结构布置进行合理的设计。本设计作为理论上的准备工作，为分析工艺流程、设备设计上存在的问题、确定问题的根源、提出解决问题的合理方案准备了充分的理论依据。 [关键词] 碳酸丙烯酯法；脱碳工艺；工程设计 The Design of the Decarbonization Section in the Production of the 40 thousand tons Synthetic Ammonia per year Abstract: Decarbonizing section is one of the absolutely necessary sections in the Synthetic Ammonia, and the Carbon dioxide absorption tower and the solution regeneration tower are indispensable tower equipment in the Synthetic Ammonia. This paper tradeoff advantages and disadvantages of much approach to decarbonization, propylene carbonate (PC) decarboniza-tion are selected finally. The technological process was analyzed, and the material and heat was balanced according to parameters and relevant standards firstly. The tower body general structure was designed calculation by using physical absorption Mechanism, mass transfer and heat transfer equation, solution -physical data stc secondly.The diameter of absorption tower is 2.1m, the height of tower is 27m, diameter of desorption tower is 2.4m, the height of tower is 29m, which were designed., And then the strength of the Carbon dioxide absorption tower and the solution regeneration tower are checked. The decarbonizing section structural arrangement was reasonable design finally. As the theoretical preparation work, this designing prepare sufficient theoretical basis for people to analysis the problems of technological process, equipment design, determined root of problems, posing reasonable plan to solve problems. Keywords: Decarbonization process; Carbon dioxide removal with PC method; Proeess design 目录 1 绪 论 1 1.1合成氨工业概况 1 1.1.1我国合成氨工业发展概况 1 1.1.2发展趋势 1 1.1.3合成氨生产工艺简述 2 1.1.4脱碳单元在合成氨工业中的作用 2 1.1.5脱碳方法概述 2 1.2净化工序中脱碳方法 2 1.2