离子交换法生产碳酸钾除氨的Aspen Plus模拟与实验研究

Aspen Plus simulation and experimental study on ammonia volatilization process in the production of potassium carbonate by ion-exchange method

为了解决除氨不彻底,二次蒸汽使传热系数降低的问题,结合碳酸钾实际生产工艺,提出吹脱除氨工艺。在不同料液温度、真空度、吹脱气量等条件下做了吹脱除氨实验,得到了最佳操作条件。同时用Aspen P lus软件模拟计算离子交换法生产碳酸钾除氨工艺。通过对料液性质、物性方法、单元操作模块的确定,建立了实验模型。Aspen P lus模拟数据与实验数据相比较,得到实验值与计算值最大偏差为8%。这说明Aspen P lus软件在碳酸钾除氨工艺设计计算中可以得到较理想的结果。

To deal with the problem of ammonia volatilization incomplete and heat transfer eoefficient reduced by seeondary steam, the air stripping technology for ammonia volatilization in the production of potassium carbonate is put forward. The experiment was finished in different feed temperature,vacuum degree,amount of air stripping. The optimal operation condition was found. Aspen Plus program was used for ammonia volatilization process in the production of potassium carbonate. Through the confirmed feed solution character, physical property method,unit operation module, the experimental model was established. Compared with simulation data and experiment data,the maximum error is 8% in these data. It is indicated that Aspen Plus program can be used in design calculation of ammonia volatilization process in the production of potassium carbonate, the preferable result can be obtained.