Water and energy saving type sand and stone aggregate washing system and use method thereof

Abstract

The invention relates to the field of sand and stone aggregates, in particular to a water and energy saving type sand and stone aggregate washing system and a use method thereof. The invention aims tosolve the problem of flocculant accumulation in the sand and stone aggregate washing system. The water and energy saving type sand and stone aggregate washing system includes a crusher, a test sieve,a large-calibre anti-blocking spraying head, a mixing aggregate belt conveyor, a fan nozzle, an end product sieve, a finished aggregate belt conveyor, a light wastewater pool, a light wastewater slurry pump, a sand washing machine, a dewatering sieve, a finished product sand belt conveyor, a concentrated wastewater slurry pump, a concentrated wastewater pool, a plate-and-frame filter press, a filter cake belt conveyor, a clean water tank and a clean water pump. The use method includes the steps of 1, crushing; 2, first sieving; 3, second sieving; 4, alternating washing; and 5, wastewater treatment. The water and energy saving type sand and stone aggregate washing system and the use method thereof have the beneficial effects that firstly, no flocculant is added; secondly, the effluent quality is generally at 5 mg / L or lower; and thirdly, the water supply volume is decreased to half. The water and energy saving type sand and stone aggregate washing system and the use method thereof aremainly used for sand and stone aggregate washing.

Description

technical field [0001] The invention relates to the field of sand and gravel aggregates, in particular to a water-saving and energy-saving sand and gravel aggregate washing system and a use method. Background technique [0002] At present, the wet washing process commonly used in the sand and gravel aggregate industry is water washing-dosing precipitation-press filtration-reuse. This method consumes a lot of water, requires a lot of investment, and the quality of the sedimentation effluent is unstable. The quality of the effluent water is generally between 10mg / L and 20mg / L (SS content), large dosage and other characteristics. In addition, during the recycling process of recycled water, the flocculant has been accumulating, which will have a certain impact on the quality of the aggregate. [0003] The effluent water quality of the sedimentation tank is unstable and the water consumption is large. At the same time, the investment cost of the sedimentation tank is high. Due ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of flocculant accumulation in the sand and gravel aggregate washing system, and to provide a water-saving and energy-saving sand and gravel aggregate washing system and its use method

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