Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Solid component
Patent
1973-03-22
1976-01-20
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Solid component
423240, 423244, 55 71, 55 73, 55 96, B01D 5334
Patent
active
039339785
ABSTRACT:
This invention relates to filtering dust or smoke-laden gases that contain dust particles by use of a pocket or bag-filter, in which, depending on the characteristics of the dust, the dust filtered out in the filter is extracted therefrom in quantities corresponding approximately to 2 to 100 times the proportion of dust arriving per unit of time in the gas to be filtered. This agglomerates the fine dust which is then continuously fed back to the incoming dust-laden gas prior to, or in, the filter. Thereafter, a quantity of incident dust is removed from the filter, this quantity corresponding to the amount of dust contained in the dirty gas per unit of time.
In accordance with this invention, a chemical additive substance is fed to the dust which is to be fed back continuously in circuit to the filter and which is incident on or is to be agglomerated in the filter, said substance being capable of reacting with any chemical contaminants contained in the dust-laden gas so as to form filterable substances. The chemical additive may be in the form of a powder or suspension and may be an oxide or hydroxide of an alkaline metal, an alkaline-earth metal or aluminum.
REFERENCES:
patent: 2919174 (1959-12-01), Pring
patent: 3834123 (1974-09-01), Margraf
Dubno Herbert
Ross Karl F.
Thomas Earl C.
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