| 摘要 |
In the continuous production of paper-pulp from solid urban waste, paper along with polluting elements are charged into a kneader or hydropulper. Water is added and the paper is pulped, however, the polluting elements remain and at least some of them cannot be reduced in size. In the bottom of the pulper there is a grate through which the paper-pulp and small sized elements can be removed. Larger sized elements are retained by the grate and periodically are removed through a second opening into a pipe in which flow is controlled by a cut-off valve. After periodic removal from the pulper, the larger sized elements and paper-pulp removed along with them, are directed into a separator where the paper-pulp and larger elements are separated and collected.
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