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The first portion of this article was an online exclusive in June/July. We pick up that discussion with additional industrial examples illustrating the work on flue-gas analysis.
Industrial combustion systems employ various methods to control flow of fuel (primarily natural gas) and oxidizer (air, O2 or combination). The combustion control system must control the flow of oxidizer in the correct proportion to the fuel flow in order to maintain the desired furnace atmosphere chemistry (oxidizing, reducing or neutral).
