| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method and a device for efficiently shredding a waste synthetic resin material in domestic refuse in a pretreatment process for feeding the resin material into a blast furnace or the like as fuel or a reducing material. SOLUTION: The waste synthetic resin material is compressed from two or more directions to be shaped in an individual piece of a prescribed shape. While this individual piece is pressed to the directions of both edges of rotary blades 8 rotating around a fixed shaft and first fixed blades 9 each paired with the rotary blade 8, it is shredded by the rotary blades 8 and the first fixed blades 9. The shredded pieces are housed and kept in a space between a partially cylindrical fixed screen, which is installed between the rotary blades 8 to leave a prescribed space, and of which the starting end is made to be adjacent to the first fixed blades 9, and the rotary blades 8 from the starting end of the fixed screen, and are sieved with the fixed screen at the same time to make them fall down. The shredded pieces which do not fall down from the sieve and move to the end edge of the fixed screen are further shredded by the rotary blades and second fixed blades 10, which are connected to the end edge part of the fixed screen, and each of which is paired with the rotary blade, to make their size smaller. In such a way, the shredded pieces are made to pass through the sieve meshes and fall down from the screen.</p> |
