Patent ID: 6923568
Filing Date: 2005-08-02
Classification: B01F,G05D

Abstract:
1. A blending system, comprising: a first material supply line to provide a first material; a second material supply line to provide a second material; a mixer fluidly connected downstream of the first and the second material supply lines to provide a blend of the first and second materials, the blend having a predetermined composition of the first and second materials and a predetermined flow rate; and a process control system comprising a first flow control device positioned on the first material supply line; a second flow control device positioned on the second material supply line; a first sensor positioned on the first material supply line to provide a first sensor signal indicative of a concentration of the first material; a second sensor positioned on the second material supply line to provide a second sensor signal indicative of a concentration of the second material; and a controller, responsive to the first and second sensor signals, to provide a respective control signal to each of the first and the second flow control devices that respectively adjusts a flow rate of the first material and a flow rate of the second material to maintain the predetermined flow rate of the blend of the first and second materials having the predetermined composition in response to variations in the concentration of at least one of the first and second materials.