Hosokawa Bepex Corporation

Bepex Corporation

Richard W Ozer

Hanford N Lockwood, Jr

Ilya Pikus

Gregory J Kimball

Gordon E Ettie

A particulate material drying apparatus and method including a pulse combustor and an associated combustion chamber. Fuel and combustion air are introduced to the combustion chamber whereby the combination of the pulse combustor and combustion chamber generates a pulsating flow of hot gases. A material feed introduction chamber receives the hot gases and material to be dried is delivered into the introduction chamber for contact therein with the flow of hot gases. A drying chamber is connected to the introduction chamber for receiving the mixture of material and hot gases exiting from the introduction chamber. The drying chamber comprises an enclosing wall, a porous inner wall spaced inwardly from the enclosing wall, and an annular space defined between the enclosing wall and the porous inner wall. Fluid under pressure is introduced to the annular space whereby the fluid passes through the porous inner wall and deters build-up of material on the inner surface of the porous inner wall.

Drying apparatus and method for pumpable materials

A system for material drying comprising a pulse combustor and an associated combustion chamber whereby a pulsating flow of hot gases are generated. A tail pipe is connected to the outlet of the combustion chamber for receiving the pulsating flow of hot gases and a material introduction chamber is connected at the outlet of the tail pipe. A drying chamber is connected at the outlet of the material introduction chamber. The hot pulse combustion exhaust gases are cooled to control the temperature of the gases issuing from the outlet of the tail pipe and entering the material introduction chamber. This control is accomplished with a cool air stream issuing into the pulse combustion mixing chamber along with the hot gases from the pulse combustion tail pipe for mixing with and cooling of the hot gases. A separate diluent air stream may be employed for contact with material issuing from the introduction chamber and passing into the drying chamber. This separate diluent air stream will urge material already present in the drying chamber away from the entry location of new material into the drying chamber. The tail pipe may be provided with an inlet end of restricted dimension to act as a venturi with respect to the pulsating stream of hot gases entering the tail pipe from the combustion chamber thereby increasing the sound levels measured at the pulse combustion discharge.

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Golden Valley, MN, United States of America

Richard W Ozer