Method and apparatus for the removal of noxious acidic gases fro

Details Method and apparatus for the removal of noxious acidic gases fro Method and apparatus for the removal of noxious acidic gases fro

1985-05-31

1986-05-20

Hart, Charles

Gas separation

Means within gas stream for conducting concentrate to collector

55 51, 55 73, 55 89, 55229, 55 94, B01D 5314

Patent

active

045898898

ABSTRACT:
A method and apparatus for removing noxious oxides of sulphur and nitrogen from a hot exhaust gas produced by burning fossil fuels and simultaneously producing a hot water stream essentially free of noxious acidic gases, suitable for district heating. The hot exhaust gas stream is fed to an absorber where it is counter currently contacted with a recirculation water stream, an inlet water stream and an alkali stream to cool the hot exhaust gas then absorb the noxious oxides. A first water line containing absorbed oxides leads from a catch try beneath the absorber middle section to a sub-atmospheric pressure stripper and a second water line leads hot recirculation water from the absorber bottom to a flash pan in the stripper. Due to the reduced pressure in the stripper the absorbed oxides are removed from the water and heat is transferred from the absorber to the stripper. All the heat energy required to operate the stripper is supplied to the system by the hot gases.

REFERENCES:
patent: 3370402 (1968-02-01), Nakai et al.
patent: 3492788 (1970-02-01), Hochgesand et al.
patent: 3511027 (1970-05-01), Roberts et al.
patent: 3824766 (1974-07-01), Valentine et al.
patent: 3847570 (1974-11-01), Gunther
patent: 4302220 (1981-11-01), Volkamer et al.

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