Grinding water treatment device for eyeglasses lens processing

A grinding water treatment device for treatment of grinding water used in eyeglasses lens processing, comprising:

• a centrifugal separator that includes a dehydration tank into which grinding water used in a processing device of an eyeglasses lens is introduced, and separates the grinding water into water and processing chips by rotation of the dehydration tank;
• a scraping unit that scrapes out the processing chips accumulated on a side wall inside the dehydration tank;
• an opening provided in the dehydration tank and through which the processing chips scraped out by the scraping unit are ejected to an outside of the dehydration tank;
• and
• a filter provided in a region outside of the opening, and through which the water separated from the grinding water by rotation of the dehydration tank passes to allow the processing chips to be present inside the dehydration tank,
• wherein the opening is formed at a bottom portion of the dehydration tank such that the dropped processing chips scraped out by the scraping unit pass through the opening,
• the filter is provided in a bottom plate of the dehydration tank at the bottom portion of the dehydration tank in the region outside the opening,
• the filter is arranged between the opening and the side wall inside the dehydration tank, and
• the bottom portion of the dehydration tank is jointed to the side wall inside the dehydration tank.