| 摘要 |
A rotary hearth pyrolyzer is described as having a conically tapered roll for uniformly spreading waste material that is charged onto the hearth for pyrolyzation. The taper of the spreader roll is such that the linear speed at any point measured longitudinally of the roll corresponds to the speed of the rotary hearth at a point on the hearth opposite the point on the spreader roll. An angularly disposed scraper blade is positioned slightly downstream of the spreader roll, relative to the movement of the rotary hearth, and has a pair of marginal edges, one of which engages the spreader roll to remove waste material sticking thereto and the other of which edges terminates in spaced relation from the hearth to evenly spread or distribute waste material onto the hearth.
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