| 摘要 |
The invention concerns a process and an equipment for pretreatment of cellulosic chip-formed raw-material by impregnation. In the process, first a vacuum treatment is carried out withou preceeding moistening treatment, and as soon as possible after the vacuum treatment penetration, is carried out with a solution of chemicals or with water at the atmospheric or a higher solution pressure. In this way the fiber cavities can be filled optimally, which promotes a uniform and adequate diffusion of the solution into the fiber walls significantly. The process can be carried out, e.g., in a device which comprises a tank for the treatment of the raw-material and therein a feed opening for the solution as well as an opening for removal of the rawmaterial, which opening communicates preferably with a reception tank, where the atmospheric or a higher pressure prevails. |
