CONTROL SYSTEM FOR AND METHOD OF COMBINING MATERIALS

摘要

An apparatus (10) and method for combining multiple materials into a stream. The multiple materials may include both a major material and one or more minor materials. The minor materials are added using inlet tubes (141) . The major and minor materials are added at transient or steady state flow rates, depending upon a command from a control signal . The apparatus and method utilize a control system which does not have flow control valves, flow control feedback loops or a dynamic mix tank. The actual flow rates track the commanded flow rates, but deviate by an error. The claimed arrangement provides a time-based error believed to be unobtainable in the prior art.