INSTALLATION FOR SAND REMOVAL Russian patent published in 2005 - IPC

FIELD: purification of sewage from mechanical impurities.

SUBSTANCE: the invention is pertaining to the field of a sewage purification from mechanical impurities. The technical result of the invention is increased effectiveness of purification of sand from organic impurities and reliable removal of the sand. The installation for sand removal contains: a through channel having the placed on its ends devices for feeding and withdrawal of sewage and a slope bottom, in the deepest part of which there is a chute for collection of the sand; a mounted above the chute circular bubble-type tube for formation of a circulation flow in the cross section of the indicated through channel and a device for sand withdrawal located along the route of the sewage stream movement and made in the form of the linked with the indicated through channel separately located tank having a cone-shaped bottom and a slope spiral conveyor with a body, a dewatering spiral, a drive unit, a discharge bottom hole and an intake device aligned with the cone-shaped bottom. The installation is additional supplied with a made in the form of a drive unit and located in the indicated chute sand pump to feed the sand from the indicated chute into a separately located tank with the cone-shaped bottom and with a bridging them sand pipeline, which has been made in the form of a direct section prolonging the indicated chute. The invention is advanced in the dependent points.

EFFECT: the invention ensures an increased effectiveness of purification of sand from organic impurities and reliable removal of the sand.

5 cl, 5 dwg