| 摘要 |
A nozzle arrangement for a flue gas scrubbing column for use in desulfurizations, in which the scrubbing column has a sump, a baffle-free zone above the sump and a nozzle arrangement above the absorption zone. The nozzle arrangement includes a branch pipe system for supply of a scrubbing liquid, and nozzles connected each by an intermediate pipe section to the branch pipe system. The position and length of the intermediate sections is selected by: (a) flow density profiles are formed in predetermined cross sectional planes of the scrubbing column by the spray cones of the nozzles; (b) in each of these cross sectional planes, the flow density profiles of different spray cones are superimposed on one another; (c) the flow density profiles of different cross sectional planes are superimposed upon projection thereof onto one of said planes to form a flow density complete profile in said one plane over the entire cross section of the scrubbing column; (d) the flow density complete profile is compared with a predetermined value; and (e) upon deviation of the flow density complete profile from said predetermined value, the position of at least one of said nozzles is adjusted by varying at least one of the position and length of the associated intermediate pipe section; and(f) repeating ste ps (a) through (e) until the flow density complete profile for the cross section of the scrubbing column has an approximately constant value up to a wall region of said cross section. The system of the invention optimizes the scrubbing of the gas and largely eliminates regions wherein the gas stream can pass through the scrubber without having been subjected to the scrubbing liquid in an effective scrubbing step. The result is improved absorption efficiency.
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