External device for cleaning filtration material and adapted for application to filtration device

摘要

An external device for cleaning a filtration material is applied to a filtration device for filtering a supplied unfiltered liquid by layers of a filtration material to remove muddiness in the liquid and discharging the cleaned liquid to the outside. The cleaning device has an upstanding outer tube, a screw conveyor rotatably placed in the outer tube and transferring the filtration material upward from the lower rod to the upper end of the outer tube while rub-washing the filtration material, a drive section for rotationally driving the screw conveyor, a control section for controlling rotation of the drive section, and a discharge tube for discharging the filtration material having been rub-washed, into a filtration container from the inside of the outer tube and an introduction tube that introduces the filtration material into the outer tube.

主权项

1. A system comprising: a filtration device which is provided with a filtration container having layers of a granular filtration material at an inside of the container and is adapted for filtering a supplied unfiltered liquid by the layers of the filtration material to remove muddiness in the liquid for discharging the cleaned liquid to an outside of the container; and a cleaning device which is located outside of the filtration container for cleaning the filtration material of the filtration device, wherein the cleaning device comprises:
i) an outer tube, ii) a screw conveyor rotatably placed in the outer tube for transferring the filtration material upward from an inlet at a lower end section of the outer tube to an outlet at an upper end section of the outer tube, while rub-washing the filtration material, iii) a drive section for rotationally driving the screw conveyor, iv) a control section for controlling rotation of the drive section, v) an introduction tube, one end of which is connected to the inlet of the outer tube and the other end of which is located at the layers of the filtration material to introduce the filtration material from the inside of the filtration container into the outer tube by only suction force generated by the rotation of a screw of the screw conveyor, and vi) a discharge tube, one end of which is connected to the outlet of the outer tube and the other end of which is located at the layers to discharge the rub-washed filtration material to the inside of the filtration container by only discharge force generated by the rotation of the screw of the screw conveyor.