绿液结盐过程中的物理化学作用

针对绿液输运过程中的结盐现象,利用多种化学分析方法和现代仪器分析手段,测定了绿液澄清器至消化器管段中的绿液化学组分和盐析物质成分,并对绿液盐析晶体粒径分布进行了测试.结果表明,因主流与管壁间的温度梯度而产生的过饱和度是绿液发生结盐的内在推动力;结盐过程不仅仅是单纯的混合结晶体析出的物理过程,而且伴有绿液与管壁材质问的化学反应,绿液本身的物理属性也加速了这一过程的进行;同时,较小的粒径分布加强了絮凝作用,构成绿液动态结盐的重要因素.

The Physical Chemistry Function in the Salt-Out Process of Green Liquid

As for the salt-out phenomena in the transmitting process of green liquid,manifold chemical analytical methods and modern instrumental analytical means are used to mensurate the chemical elements of green liquid and the components of salt-out material in the pipe segment from the green-liquid defecating implement to the digesting equipment.And the diameter distribution of salt-out crystal in green liquid is also measured.The result indicates that the supersaturation caused by the temperature grades between main flow and the pipe wall is the inherent impetus of salt-out in green liquid.The salt-out process is not only the simple physical course of the separating out of mixed crystal,but also with the chemical reaction between green liquid and the material of the pipe wall.Meanwhile,the less diameter distribution enhances the function of flocculation,which is the main factor of the dynamic salt-out in green liquid.