| 摘要 |
PURPOSE:To enable pellets nonuniform in shape or size produced in a beginning period of pelletization to be discharged to the exterior and prevent the interior of a pump from being damaged or clogged by connecting a jet pump to the lower end of a cooling water tank through a three-way cock having a draining port. CONSTITUTION:Pellets formed by a rotary cutter 5 are scattered into a cooling water tank 6 provided in the vicinity of the cutter 5. A flow of water fed under pressure by a water pump 11 is supplied through a discharging port 11a and a piping 11f to a jet pump 13. In a beginning period of an operation of a pelletizer 1, favorable pelletization can not be achieved stably. In such a situation, a three-way cock 12 is switched to a draining port 12a, whereby the pellets scattered into the tank 6 are discharged to the exterior through the draining port 12a of the cock 12, together with the water contained in the tank 6. After stable pelletization comes to be achieved, the cock 12 is switched to the side of the jet pump 13, whereby the pellets favorably formed are passed, together with the water in the tank 6, through a suction port 13a to be pressurized by the jet pump 13, and are fed under pressure to the next step. |
