Chemical mixing apparatus, system and method

Abstract

There is disclosed a system and method of formulating a batch comprising at least two ingredients. An embodiment is disclosed wherein a feedforward algorithm can be used to control the target blend. Subsequently a feedback closed loop control loop algorithm is provided for a multivariant blend. Use of this approach allows for a continuously autoreplenished and controlled blend. Another enhancement disclosed is the ability to control via feedforward and feedback algorithms a fast responding control mode which allows for the elimination of a tank. This approach will allow for “one pass” blending with control. Feedback control can be provided via process indicators or through analytical or parametric methods. The controller implements an automated fault detection and correction system, thereby identifying necessary maintenance prior to failure. If failure does occur the signature recognition allows rapid analysis and correction thus maximizing tool availability.

Description

PRIORITY CLAIM [0001] This application hereby claims priority to, and incorporates herein by reference in its entirety, U.S. Provisional Patent Application Ser. No. 60 / 586,189 entitled “Chemical Mixing Apparatus, System and Method”, filed Jul. 8, 2004; U.S. Provisional Patent Application Ser. No. 60 / 586,968 entitled “Point of Use Chemistry Blending Control”; U.S. patent application Ser. No. 10 / 877,705 entitled “Chemical Mixing Apparatus, System and Method”, filed Jul. 9, 2004; and PCT Patent Application No. PCT / US04 / 41053 filed Dec. 9, 2004.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates in general to an apparatus, system and method for mixing chemicals. It more particularly relates to such an apparatus, system and method for mixing ingredients in a precise manner in accordance with a given recipe. [0004] 2. Description of the Relevant Art [0005] This section describes the background of the disclosed embodiment of the present inventi...

AI Technical Summary

Benefits of technology

[0024]FIG. 12 is a flow chart of a general control method for mixing chemicals; and

[0025]FIG. 13 is a flow chart for a general control method of mixing ch

Problems solved by technology

While these methods may be successful for some applications to assure quality of process, they each may employ unwanted and undesirable delays.

If the test fails, draining and refilling the chemistry subsequent to the test results may be required.

This may result in unacceptable delays, additional costs and additional cycle time to the manufacturing process in certain applications.

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