Division Description
United Kingdom
The technique consists of managing NOX emissions from several or all combustion units and FCC units on a refinery site in an integrated manner, by implementing and operating the most appropriate combination of BAT across the different units concerned and monitoring the effectiveness thereof, in such a way that the resulting total emissions are equal to or lower than the emissions that would be achieved through a unit-by-unit application of the BAT-AELs referred to in BAT 24 and BAT 34.
This technique is especially suitable to oil refining sites:
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with a recognised site complexity, multiplicity of combustion and process units interlinked in terms of their feedstock and energy supply;
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with frequent process adjustments required in function of the quality of the crude received;
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with a technical necessity to use a part of process residues as internal fuels, causing frequent adjustments of the fuel mix according to process requirements.
BAT-associated emission levels: See Table 18.
In addition, for each new combustion unit or new FCC unit included in the integrated emission management system, the BAT-AELs set out under BAT 24 and BAT 34 remain applicable.
Monitoring associated with BAT 57
BAT for monitoring emissions of NOx under an integrated emission management technique is as in BAT 4, complemented with the following:
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a monitoring plan including a description of the processes monitored, a list of the emission sources and source streams (products, waste gases) monitored for each process and a description of the methodology (calculations, measurements) used and the underlying assumptions and associated level of confidence;
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continuous monitoring of the flue-gas flow rates of the units concerned, either through direct measurement or by an equivalent method;
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a data management system for collecting, processing and reporting all monitoring data needed to determine the emissions from the sources covered by the integrated emission management technique.