Furnaces – With programmed or cyclic control means
Patent
1993-02-26
1994-01-25
Favors, Edward G.
Furnaces
With programmed or cyclic control means
110185, 110186, 110190, 236 15BA, 236 15BD, 236 15E, 431 14, 431 76, F23N 522
Patent
active
052807568
ABSTRACT:
A method and system for controlling and providing guidance in reducing the level of NO.sub.x emissions based on controllable combustion parameters and model calculations while maintaining satisfactory plant performance and not causing other harmful consequences to the furnace. To implement such a system, boiler control values of flow, pressure, temperature, valve and damper positions in addition to emission sensors for data associated with the production of NO.sub.x, O.sub.2, CO, unburned carbon and fuel. This information is received from standard sensors located throughout a boiler which are connected either to a distributed control system (DCS), or another data acquisition system which is time coordinated with the DCS. The DCS passes this information to a computing device which then processes the information by model based optimization simulation programs, also referred to as the NO.sub.x Emissions Advisor. The presentation of recommendations to the operator consists of a series of graphic displays hierarchically arranged to present the operator with a simple summary that has available more detail support displays at lower levels. The NO.sub.x emissions automation system transmits the recommended positions to the controlling devices including furnace air dampers and coal feeders.
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Trivett, G. Michael, "NO.sub.x Reduction and Control Using an Expert System Advisor", Mar., 1991, Washington, D.C.
Favors Edward G.
Stone & Webster Engineering Corp.
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