Elongated slot dryer for wet particulate material

An apparatus for drying wet coal which comprises:

• a. an elongated trench having walls forming an inverted truncated conical shape with an inlet in the top of said trench for admission to said trench of said wet coal and an outlet in the bottom of said trench for removal of relatively dry coal, said outlet having an opening of less width than the opening of said inlet;
• b. a coal throughput movement means comprising a vibration means in communication with said elongated trench and supported from the walls or from beneath the outlet of said inverted conical shape;
• c. one or more elongated drying fluid hollow conduit situated in said trench in a plane substantially parallel and in a position elevated with respect to said dry coal outlet means;
• and
• d. multiple perforations situated in the lower one-half of said elongated drying fluid hollow conduit with respect to the direction of said relatively dry coal outlet in said bottom of said elongated trench for passage of drying fluid in a downward path in co-current contact with said wet coal and wherein said drying fluid gradually turns in an upward direction to countercurrent contact with said coal.

An apparatus for drying wet coal which comprises:

• a. an elongated trench having walls forming an inverted truncated conical shape with an inlet in the top of said trench for admission to said trench of said wet coal and an outlet in the bottom of said trench for removal of relatively dry coal, said outlet having an opening of less width than the opening of said inlet;
• b. a coal throughput movement means comprising a rotating conveyor arm intermittently communicating with said relatively dry coal bottom outlet means;
• c. one or more elongated drying fluid hollow conduit situated in said trench in a plane substantially parallel and in a position elevated with respect to said dry coal outlet means;
• and
• d. multiple perforations situated in the lower one-half of said elongated drying fluid hollow conduit with respect to the direction of said relatively dry coal outlet in said bottom of said elongated trench for passage of drying fluid in a downward path in co-current contact with said wet coal and wherein said drying fluid gradually turns in an upward direction to countercurrent contact with said coal.

An apparatus for drying wet coal which comprises:

• a. an elongated trench having walls forming an inverted truncated conical shape with an inlet in the top of said trench for admission to said trench of said wet coal and an outlet in the bottom of said trench for removal of relatively dry coal, said outlet having an opening of less width than the opening of said inlet;
• b. a coal throughput movement means comprising a shaker means in communication with said elongated trench to shake said coal as said coal traverses said elongated trench;
• c. one or more elongated drying fluid hollow conduit situated in said trench in a plane substantially parallel and in a position elevated with respect to said dry coal outlet means;
• and
• d. multiple perforations situated in the lower one-half of said elongated drying fluid hollow conduit with respect to the direction of said relatively dry coal outlet in said bottom of said elongated trench for passage of drying fluid in a downward path in co-current contact with said wet coal and wherein said drying fluid gradually turns in an upward direction to countercurrent contact with said coal.