Table 3 to Subpart BB of Part 63 - Monitoring Equipment Operating Parameters  


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  • Table 3 to Subpart BB of Part 63 - Monitoring Equipment Operating Parameters

    You must . . . If . . . And you must monitor . . .a And . . .a
    Absorbers (Wet Scrubbers)
    Install a continuous parameter monitoring system (CPMS) for liquid flow at the inlet of the absorber. Your absorber is designed and operated with pressure drops of 5 inches of water column or more; and you choose to monitor only the influent liquid flow, rather than the liquid-to-gas ratio Influent liquid flow.
    Install CPMS for liquid and gas flow at the inlet of the absorberb Your absorber is designed and operated with pressure drops of 5 inches of water column or less; or
    Your absorber is designed and operated with pressure drops of 5 inches of water column or more, and you choose to monitor the liquid-to-gas ratio, rather than only the influent liquid flow, and you want the ability to lower liquid flow with changes in gas flow
    Liquid-to-gas ratio as determined by dividing the influent liquid flow rate by the gas flow rate through the absorber. The units of measure must be consistent with those used to calculate this ratio during the performance test You must determine the gas flow rate through the absorber by:
    Measuring the gas flow rate at the absorber inlet or outlet;
    Using the blower design capacity, with appropriate adjustments for pressure drop;c or
    Using a regression model.d
    Install CPMS for pressure at the gas stream inlet and outlet of the absorber Your absorber is designed and operated with pressure drops of 5 inches of water column or more Pressure drop through the absorber You may measure the pressure of the inlet gas using amperage on the blower if a correlation between pressure and amperage is established.

    [80 FR 50450, Aug. 19, 2015, as amended at 82 FR 45200, Sept. 28, 2017]