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Greenhouse Gas Reduction for Saskferco |
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An example with the application of advanced control using Profit Suite is the Saskferco Products nitric acid plant in Canada. The issue was meeting the tight requirements for emission of greenhouse gasses at the back end of the plant, especially NOx and methane. The undesired gasses were burned in a combustor and then reduced across a catalyst to produce Nitrogen, CO2 and water.
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The undesirable gasses could easily be chemically reduced and the emission standards met, but the easiest way to do this was to over-burn the stream. This consumed more energy and also consumed some of the desired products. The effect of the "easy" compliance was to reduce the overall plant production capacity in order to assure compliance with environmental regulation.
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The Honeywell Profit Controller applications enabled the nitric acid plant to produce at capacity while maintaining control of emissions and at the same time reducing the energy consumed in the combustor. The methane emissions were reduced by 25%, and fuel consumption was decreased by 5%, while plant production increased by 3%, and with greater stability. The project achieved a net decrease in energy consumption and an increase in plant capacity, while maintaining environmental compliance. By all accounts this was a most valuable improvement in plant operations.
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