Method and apparatus for smoothing irregular particulate flow stream

Abstract

A system for converting an irregular flow stream of solid particulates into a continuously flowing stream of solid particulates is disclosed. The system comprises a bin adapted to receive the irregular particulate flow stream. A level sensor is adapted to produce an output signal representative of the volume of particulates in the bin. The bin level controller has a set point corresponding to a desired level for the volume of particulates in the bin and is adapted to receive the output signal from the level sensor. The bin level controller produces a bin level control signal proportional to the deviation from the set point signal. A movable valve is positioned proximate the outlet adapted to modulate the particulate flow stream out of the bin and a valve controller is operatively associated with the valve. The valve controller is adapted to respond to bin level control signals from the bin level controller. The bin level controller is constructed and arranged to operate the valve such that the volume of particulates remains at the bin set point level to ensure a constant stream of particulates out of the bin through the outlet. Once the particulate flow stream is continuous and measured, it may be subjected to further operations such as proportional coating or mixing of additional constituents.