Appeal No. 1998-0425 Page 29
Application No. 08/272,527
24. The apparatus according to claim 23 wherein said at least
one measuring device comprises pressure or flow measuring
devices capable of measuring pressure across or flow of gas
through one or more diffusion elements.
25. The apparatus according to claim 23 wherein said at
least one measuring device comprises pressure and flow
measuring devices capable of measuring the pressure across and
flow of gas through one or more diffusion elements.
26. The apparatus according to claim 23 wherein said at
least one measuring device comprises at least one device
capable of measuring said changes with sufficient precision to
maintain the dynamic wet pressure across the diffusion
elements in a range not to exceed about 15 inches of water
gauge above said base condition.
27. The apparatus according to claim 23 wherein said at
least one measuring device comprises at least one device
capable of measuring the hydrostatic pressure of said liquid
at about the elevation of the diffusion elements, at least one
device capable of measuring gas pressure within a plenum
downstream of a flow regulator, and at least one device
capable of measuring the gas pressure within a header
supplying gas to said flow regulator.
28. The apparatus according to claim 23 wherein said at
least one measuring device includes at least one dynamic wet
pressure measuring device capable of measuring the dynamic wet
pressure across one or more of said diffusion elements.
29. The apparatus according to claim 23 wherein said
diffusion elements are divided into at least two groups, said
at least one measuring device includes at least one flow
measuring device capable of measuring the respective flow or
flows of gas through at least one selected group among said at
least two groups, and said apparatus includes at least one
controlling device capable of controlling flow of cleaning
agent to one or more of said selected groups.
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