蒸汽机械增压技术在脱硫再生SO_2解吸过程中的应用

Application of steam mechanical pressurizing technology in SO_2 desorption by desulphurization regeneration process

对蒸汽机械增压(MVR)技术和离子液脱硫再生工艺原理、物理化学参数(如SO_2在吸收液中的溶解度及在液体表面的气相分压等)、公式计算进行了分析和研究。因吸收液解吸体系温度和压缩机压缩能力的限制,目前MVR技术无法完全替代生蒸汽再沸式传统工艺对SO_2吸收液进行再生。采用MVR技术+部分生蒸汽对吸收富液进行SO_2解吸能够有效降低对生蒸汽的消耗,初步估计可降低80%左右的生蒸汽耗量,具有显著的节能降耗作用。

The calculation of the formula of steam mechanical supercharging(MVR)and the principle of chemical recovery of ionic liquid desulphurization,the physical and chemical parameters(such as the solubility of SO2in the absorption liquid and the gas partial pressure on the liquid surface)are analyzed and studied.Due to the limitation of the absorption solution desorption system temperature and the compression capacity of the compressor,the current MVR technology can not completely replace the traditional steam reboil process to regenerate the SO2absorbing liquid.The usage of MVR technology and partial raw steam to absorb rich liquid SO2desorption can effectively reduce the consumption of raw steam,steam consumption reduced by about80%,with significant energy saving effect.