摘要
对反应—结晶耦合法生产硝酸钾工艺流程进行模拟计算,计算表明:反应压力对体系的蒸发水量和温度有较大影响,压力越低,中和反应过程中系统温度的升高值和系统蒸发水量越大,降温结晶过程能耗相应越低,且析出晶体数量越多。低压低温下反应结晶有利于硝酸钾析出,质量流率为200 kg/h 60.04%的硝酸和350 kg/h 30.60%的氢氧化钾在10 kPa条件下进行中和反应时,反应放热最高可使系统温度升高至约48℃,当降至20℃结晶时,硝酸钾晶浆浓度为17.90%,反应器热负荷为-20.05 kW。
The process flow of potassium nitrate production by the reaction-crystallization coupling method was simulated and calculated.The calculation indicates that the reaction pressure has a significant influence on the evaporation water amount and temperature of the system.The lower the pressure,the greater the increase in the system temperature and the evaporation water amount during the neutralization reaction.Correspondingly,the energy consumption in the cooling crystallization process is lower,and the amount of precipitated crystals is larger.Reaction crystallization at low pressure and low temperature is conducive to the precipitation of KNO_(3).When 60.04%HNO_(3)with a mass flow rate of 200 kg/h and 350 kg/h 30.60%KOH undergo a neutralization reaction at 10 kPa,the heat released by the reaction can increase the system temperature to approximately 48℃ at the maximum.When the temperature is reduced to 20℃ for crystallization,The concentration of the potassium nitrate slurry is 17.90% and the heat load of the reactor is-20.05 kW.
作者
魏晨
吴凯敏
石敏
刘海红
王晓波
WEI Chen;WU Kaimin;SHI Min;LIU Haihong;WANG Xiaobo(Qinghai Salt Lake Industry Co.,Ltd.,Golmud 816000,China;Qinghai Salt Lake Resources Comprehensive Utilization Technology Innovation Center Co.,Ltd.,Xining 810007,China)
出处
《盐科学与化工》
2026年第2期43-45,50,共4页
Journal of Salt Science and Chemical Industry
基金
青海省十大国家级科技创新平台“盐湖资源综合利用技术创新中心”培育建设(2025-GX-J04)。
关键词
硝酸钾
反应—结晶耦合
流程模拟
Potassium nitrate
Reaction-crystallization coupling method
Process simulation
