Method and device for drying fine particulate material such as fracking sand
AssigneeIndustrial Process Systems, Inc.
InventorsLeonard A Loesch, Oscar Mathis, III
Life of this patent
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Abstract
A device and method for drying fine particulate. A parallel flow rotary drum dryer is used to dry the particulate material. There is a combustion chamber for the burner, located upstream of the dryer inlet, and the burner flame is limited to the combustion chamber so the fine particulate material does not come into direct contact with the burner flame. The output from the dryer passes through a knock-out box including a baffle system with a plurality of narrow gaps to create a pressure drop to slow down the gas flow and enable the entrained fine mesh dry particulate to drop out through a bottom outlet before the effluent gas is sent to the dust collection/air filtration system.
Claims7
A method for drying small particulate material, comprising the steps of:
- introducing small particulate material into the inlet of a parallel flow rotary dryer having an inlet and an outlet;
- providing a burner and a combustion chamber upstream of said inlet, and controlling the burner flame so that the burner flame terminates upstream of said inlet;
- providing a knock-out box in fluid communication with the outlet of said dryer to receive the dried particulates and gases from said dryer, said knock-out box including a baffle defining a plurality of narrow gaps through which the gases from said outlet end pass in order to exit said knock-out box and defining a bottom outlet through which the particulates pass in order to exit said knock-out box;
- and
- controlling the flow rate of the gases through the knock-out box to no more than 120 feet per minute to allow the small particulate material to fall out of the gases and out the bottom outlet of said knock-out box.
Dependencies are inferred from the claim text.