Process for the production of a cellulose solution and device therefor

The present invention provides a process for making a cellulose solution. NMMO with a relatively low concentration and non-activated mass are continuously mixed online， the mixed premix is ????dewatered in an evaporative drainage device until an NMMO concentration is reached which is suitable for swelling， sufficient swelling is then carried out under this condition， and the uniformly mixed and swollen pre-swelling solution is subjected to pressure-relieved evaporation dewatering and dissolution by a thin film evaporator， thereby obtaining a uniformly dissolved cellulose solution of high concentration and excellent uniformity. The present invention further provides a continuous manufacturing apparatus for the process of manufacturing a cellulose solution. According to the present invention， the conflict between a uniform mixture and sufficient swelling during the manufacture of a high concentration cellulose solution is solved and problems in storage and transportation safety caused by using high concentration NMMO in the conventional technologies are avoided. And the mass used does not have to be activated so that the energy consumption is low. According to the process provided by the present invention， the technological process is safer， more energy-efficient and more efficient， and continuous industrial production is facilitated.