热泵闪蒸汽提脱氨生产固体硫酸铵过程的能量利用

Study on energy utilization in production of solid ammonium sulfate by steam stripping and ammonia removal process of heat pump

研究了蒸发结晶和闪蒸汽提脱氨技术集成生产固体硫酸铵系统中的各种热量利用效果;蒸发结晶和闪蒸汽提脱氨技术集成生产固体硫酸铵与直接生产硫酸铵溶液总蒸汽耗量基本一致;蒸发结晶和闪蒸汽提脱氨技术集成生产固体硫酸铵时,保证过程能耗不增加,达到节能目的;随着废水中氨氮含量的增加,系统整体的蒸汽耗量增加,但补充蒸汽用量降低,且到一定含量时,不需要补充蒸汽,甚至需排放过多蒸汽。

The utilization effects of various heat sources in the integrated production of solid ammonium sulfate by evaporative crystallization and flash steam extraction deamination are studied. Under certain conditions, the integrated production of solid ammonium sulfate by evaporative crystallization and flash steam extraction deammoniation is basically consistent with the total steam consumption in direct production process of ammonium sulfate solution.The combination of evaporative crystallization and flash steam extraction deammoniation technology ensures that the energy consumption of the process does not increase while producing solid ammonium sulfate, achieving the goal of energy saving. With the increase of ammonia nitrogen content in wastewater, the overall steam consumption in the system increases, but the amount of steam supplementation decreases. When a certain amount of steam is added, it is not necessary to add steam or even excessive steam can be discharged.