Wet scrubber 10 further comprises a first circulation
pump 36 which circulates in a fluidly connected
absorption liquid circulation pipe 38, an absorption liquid,
sometimes referred to as a limestone slurry or an alkaline
sodium solution. Absorption liquid is pumped by first circulation
pump 36 from absorption liquid tank 26 through
fluidly connected circulation pipe 38 to an absorption liquid
inlet 40a at point of entry 40b into wet scrubber tower
14 fluidly connected to first spray level system 40 arranged
horizontally across interior 16 in mid portion 42
of wet scrubber tower 14 adjacent base portion 20. Wet
scrubber 10 further comprises a second circulation pump
44 which circulates in a fluidly connected absorption liquid
circulation pipe 46, an absorption liquid from fluidly
connected absorption liquid tank 26. Absorption liquid is
pumped by second circulation pump 44 through fluidly
connected circulation pipe 46 to an absorption liquid inlet
40a at point of entry 40b into wet scrubber tower 14 fluidly
connected to second spray level system 48 arranged horizontally
across interior 16 in mid portion 42 of wet scrubber
tower 14 vertically about .3 to about .5 meters above
first spray level system 40. Wet scrubber 10 further comprises
a third circulation pump 50 which circulates in a
fluidly connected absorption liquid circulation pipe 52, an
absorption liquid from fluidly connected absorption liquid
tank 26. Absorption liquid is pumped by third circulation
pump 50 through fluidly connected circulation pipe 52 to
an absorption liquid inlet 40a at point of entry 40b into
wet scrubber tower 14 fluidly connected third spray level
system 54 arranged horizontally across interior 16 in mid
portion 42 of wet scrubber tower 14 above second spray
level system 48. Wet scrubber 10 further comprises a
fourth circulation pump 50a which circulates in a fluidly
connected absorption liquid circulation pipe 52a, an absorption
liquid from fluidly connected absorption liquid
tank 26. Absorption liquid is pumped by fourth circulation
pump 50a through fluidly connected circulation pipe 52a
to an absorption liquid inlet 40a at point of entry 40b into
wet scrubber tower 14 fluidly connected to fourth spray
level system 54a arranged horizontally across interior 16
in mid portion 42 of wet scrubber tower 14 above third
spray level system 54. Distance CC illustrated in Figure
1, is determined by measuring from the vertical mid-point
of the point of entry 40b of one spray level system, e.g.,
the first spray level system 20, to the vertical mid-point
of the point of entry 40b of another spray level system,
e.g., the fourth spray level system 54a. Distance CC is
preferably approximately .3 m to about .5 m per spray
level system within distance CC. Distance CC is significantly
reduced in the subject embodiment due to use of
a plurality of flattened relatively wide spray angle nozzles
56 equipped on each spray level system without unwanted
absorption liquid spray interference between adjacent
spray level systems that causes decreased sulphur dioxide
removal efficiency. A greater distance CC is less
preferable, since a greater distance CC increases the
overall vertical height of wet scrubber tower 14 required,
thus increasing investment and operating costs. It will be
appreciated that a wet scrubber 10 could comprise more
or less than four spray level systems, for example 2 to
10 spray level systems arranged in interior 16 of wet
scrubber tower 14