Patent ID: 8679441

Claim:
A method of controlling of a fume treatment centre (FTC), for scrubbing baking fumes originating from a baking furnace (BF) for carbonaceous blocks, said BF being a baking furnace of the “ring” type, the baking fumes of which are extracted by at least one exhaust manifold of said BF and collected in a fume main conveying said fumes to said FTC comprising a tower for cooling said fumes by spraying water into said fumes at an outlet of said fume main, and at least one reactor for the physico-chemical neutralization of said fumes by putting said fumes in contact with a powder reagent, then filtering loaded reagent and fume dust, recycling in said reactor of at least one fraction of filtered reagent, and mixing of said fraction with fresh reagent, said method comprising: adopting a carbon monoxide (CO) content of said fumes at an outlet of said BF as a parameter indicating a pollution level of said fumes at an intake of said FTC; performing at least one step selected in the group consisting of: regulating a water flow rate in said cooling tower and regulating a reagent flow rate and a reagent recycling rate in said reactor, in accordance with at least one parameter, including the CO content, and indicating a pollution level of said fumes at an intake of said FTC; determining said CO content of said fumes at said outlet of said BF; varying, in said FTC, one at least of said fresh reagent flow rate and said recycled reagent flow rate in said reactor in accordance with said CO content, so as to optimize a quantity of reagent used in accordance with the pollution level of said baking fumes at said outlet of the BF; and considering that said CO content of said baking fumes at said outlet of said BF is a content measured in at least one exhaust manifold of said BF or a weighted average of CO contents measured in each of exhaust manifolds in operation or a CO content measured in a fume flue at said BF outlet.