US 4,227,892 A · Method and apparatus for removing micronized coal from steam

Abstract

Micronized coal is removed from coal-bearing steam by spraying stabilized petroleum oil into the steam and directing the resultant stream at a separation surface on which a coal-oil slurry is deposited and collected. Apparatus includes conduits which direct the resultant stream downward into a housing and normal to a surface on which the slurry is deposited by impact forces. In additional apparatus disclosed, the resultant stream is directed from a horizontal conduit circumferentially along the interior wall of a horizontally disposed cylindrical chamber at the top of the chamber and the coal-oil slurry deposited on the wall by centrifugal force is collected in a trough situated below a longitudinal slot at the bottom of the chamber. In both types of apparatus, after separation of the slurry the velocity of the steam is reduced to settle out remaining oil droplets and is then discharged to the atmosphere.

Claims21

Dependent claims

Apparatus for removing micronized coal from steam in a coal pulverizer comprising:

a housing;
a conduit extending downward into and terminating in the lower portion of said housing;
means in said conduit for spraying petroleum oil into the flow of coal-bearing steam in the conduit;
means defining an impact surface disposed in spaced relation to the lower end of said conduit against which said flow impacts at a substantial angle to the surface thereof such that a coal-oil slurry is deposited thereon;
means for collecting the coal-oil slurry deposited on said surface;
a discharge opening near the top of said housing for said steam;
and
baffles in said housing for reducing the velocity of said steam, as it rises to the discharge opening, below the settling velocity of the oil droplets, whereby additional coal-oil slurry will separate from the steam.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus for removing micronized coal from steam

Life of this patent

Method and apparatus for removing micronized coal from steam

Life of this patent

Abstract

Claims21