C - Chemistry – Metallurgy – 10 – J
Patent
C - Chemistry, Metallurgy
10
J
165/3, 48/46
C10J 3/84 (2006.01) B01D 47/00 (2006.01) C10K 1/10 (2006.01)
Patent
CA 1076021
ABSTRACT Method and apparatus for cleaning gases, especially those generated by the pressurised gasification of coal, to remove impurities therefrom, especially tar, dust and salts, in which the gases are washed with a liquid, preferably water, in a scrubbing unit and the wash liquid is cleaned to yield a major clean liquid stream which is recycled by a circulating means to the scrubbing unit and a minor impurities concentrate stream from which the impurities are removed, in a separator unit. Preferably the wash liquid is cleaned using a plurality of hydrocyclones which may be arranged in series or in parallel. Optionally the liquid recovered from the impurities concentrate stream is returned to the scrubbing unit, although if the quantity of this liquid is equal to the quantity of liquid required for the de-salting of the wash liquid, no recovered liquid is returned to the scrubbing unit.
234134
Lenk Arthur
Zimmermann Fritz
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