硝酸铵机械通风造粒塔的工艺计算

Process calculation of mechanical ventilation prilling tower for ammonium nitrate

介绍了硝酸铵造粒塔造粒单元的计算过程,通过造粒单元的理论工艺计算确定机械通风造粒塔的设备规格。并与实际运行装置进行数据的对比验证。利用硝酸铵颗粒在造粒塔内下落过程各阶段所对应的区域的传热物性参数计算理论塔高,利用运动学方程计算硝酸铵颗粒下落过程的碰壁高度确定塔径。由现运行装置验证了计算的合理性,结合实际项目设备的运行情况对造粒塔计算过程所涉及的部分方程做了分析,讨论关键参数对造粒塔设计的影响。对造粒塔的设计校核有一定的指导和借鉴。

The calculation process of prilling unit in the ammonium nitrate prilling tower was introduced. Through the theoretical process calculation of prilling unit, the specifications of the mechanical ventilation prilling tower were determined, followed by a comparison with the data of actual running devices for validation. The theoretical height of the tower was calculated based on the heat-transfer physical parameters of each corresponding zone where the ammonium nitrate particles freely fall through the tower; the tower diameter was determined by calculating the hitting point of particles onto the tower wall based on kinematic equations. The reasonableness of the calculation was verified by the running device, and part of the equations involved in the calculation process of the prilling tower were analyzed combined with the actual operation of the project equipment, discussing the impact of the key parameters on the design of prilling tower. This makes guidance and reference for the design and checking for prilling tower.