Oil sand cleaning apparatus

Details Oil sand cleaning apparatus Oil sand cleaning apparatus

B - Operations, Transporting

03

B

196/17

B03B 9/02 (2006.01) B01D 21/00 (2006.01)

Patent

CA 1297060

ABSTRACT OF THE DISCLOSURE Heavy oil production results in oily sand waste products, the disposal of which presents a problem. Since the oily sand causes rapid wear on heavy oil treatment equipment, it is important to deal with the problem early in the treatment process. For this reason recovery of the bulk of the sand is effected at the so-called free water knockout, which is a tank operating at atmospheric pressure for removing free water and sand from the heavy oil. Sand drops to the bottom of the tank. Oil separates from the water, rises to the top of the tank and overflows to the next piece of treatment equipment. Water is siphoned from the bottom of the tank and fed to a water disposal plant. The apparatus described herein includes a pump for feeding a sand slurry from the bottom of the tank to hydrocyclones, dewatering screens to which fresh water is added to clean the sand and remove additional moisture therefrom, and a hopper for receiving the clean sand. Water from the hydrocyclones is returned to the bottom of the tank, and water from the screen is pumped into the sand at the bottom of the tank to maintain the sand in a slurry.

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