A METHOD FOR CONTROLLING COMBUSTION BY-PRODUCT FORMATION RATE IN A FOSSIL FUEL FIRED POWER PLANT

摘要

A method for determining combustion by-product formation rate in a fossil fuel fired power plant, which has a burner (12a) and a flame scanner (18a), comprises : obtaining an image signal of flame in the burner (12a) by focusing a flame scanner (18a) on an area of the flame in the burner (12a) where the flame flicker frequency is characteristic of a limited number of combustion pockets in which fuel and air mix and burn, generating a flame signal representing properties of temporal combustion in the visible light spectrum at the burner (12a) from the image signal, relating a combustion by-product emission level from the burner (12a) to the flame signal by calculating a dynamic invariant of the flame signal that provides a measure of the nonlinear dynamics of the flame, the dynamic invariant being nearly constant at the same combustion by-product emission level of the burner (12a) and having a consistent relationship with different emission levels of the combustion by-product.