为探讨利用热空气中的废热用于溶液再生,对热空气用于氯化锂水溶液的顺流再生过程进行了实验研究,通过加热空气获得40-60℃热空气来模拟不同品位的废热空气,结合NTU-Le模型和实验数据计算得到了溶液再生过程耦合传热传质系数,分析了空气流量、空气温度和溶液流量对热空气用于溶液再生过程传热传质系数的影响,并对冷凝器排热之类的热空气用于溶液再生的热利用效率进行了分析,获得了溶液浓度、空气温度和流量对热空气用于溶液再生过程再生热效率的影响。
Exhaust heat in hot air can be used to liquid desiccant regeneration process. In this paper experiments with parallel flow between air and desiccant were carried out using hot air to assist the regeneration of lithium chloride aqueous. The process air was heated to 40-60℃ to simulate the different heat grade of exhaust hot air. The influence of air flow rate, temperature and solution flow rate on the heat and mass transfer coefficients of regeneration process were analyzed based on the NTU-Le model and experimental data. The energy efficiency of desiccant regeneration using condensing heat were discussed according to the experimental results, and the effect of solution concentration, air temperature and flow rate on the regeneration thermal efficiency was obtained.