| 摘要 |
An apparatus and method is disclosed for experimental displacement of liquids in slurries for measuring filtration rate, washing performance and displacement bleaching in pulp. An open top cylinder is movable to a vertical orientation and has a piston slidably positioned therein. The piston includes a porous face with communicating passages to its rear surface. Apparatus are provided for registering pressure in the cylinder as well as for providing regulated motion of the piston. Also, a valve is provided for admitting wash water to the lower part of the cylinder for back washing the filter cake.
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