金属氢化物反应器的设计与过程模拟

Design and Process Simulation of Metal Hydride Reactors

针对工业废热回收装置的要求，提出了一种新型的环盘式化学热泵反应器．该反应器采用多组配对环盘装填金属氢化物，环盘面积取壳体截面积的50％～80％，具有结构紧凑、反应传热均匀、工业调控方便等优点．应用多元价值取向模型进行的多种反应器方案的系统评估表明，新型反应器的综合评价指标优度为0．898，明显优于其他类型．采用有限容积法对描述反应器动态过程的非局部热平衡模型进行了离散求解，模拟结果证明新型反应器的工作过程较为快速和均匀，操作周期在0．5h内，适用于工业热能的回收利用；同时，为平衡氢化／脱氢过程反应传热的不对称性，应尽可能强化氢化传热过程与脱氢反应过程．

A unique annulus-disk type reactor for chemical heat pumps was proposed to meet the demand of waste heat recovery in industrial applications. Several couples of annulus and disk shape containers were used to fill metal hydride in this new reactor. The annulus/disk area was about 50%-80% of the sectional area of reactor shell, and the reactor is characterized by simple structure, uniform reaction and heat transfer, and convenient control. A multi-element valued model was used to generally evaluate the reactor schemes, and the integrated superiority was 0. 898. A non-local thermal equilibrium model was applied to describe the dynamic process in reactors, and the finite volume method was used to discretize and solve it. The simulation results show that the new reactor is suitable for industrial heat recovery with rapid and uniform process, and the operating cycle is less than 0. 5 h. In addition, heat transfer during adsorption and reaction during desorption must be improved to balance the asymmetry problem.