Apparatus and process for the drying of wet, loose material, in particular, coke power or fines

Claim 2

A process for the drying of wet, pulverulent material while avoiding the generation of air borne dust by means of a burner providing a flame and flue gases extending along an axis, said method comprising the steps of: moving the wet, pulverulent material along the axis from a point spaced from said burner toward said burner while rotating the material about an axis aligned with the axis of the flame and gases for exposing the materials to the gases for predrying the material down to a predetermined moisture level at or above which dust generation does not occur, said movement and rotation entraining the removed moisture in discharged gases; thereafter continuing the movement and rotation of the predried material along the axis while placing the material in closed heat transfer relationship with respect to the flame and gases to further dry the material to a terminal moisture level below the predetermined moisture level; and discharging the moisture produced by the further drying of the material.

Claim 3

The process according to claim 1 characterized in that the material is predried to a moisture level of approximately 10-12%.

Claim 4

The process according to claim 2 characterized in that the material is further dried to a residual moisture level of approximately 2% and the moisture produced out of the further drying is discharged without dust.

Claim 5

The process according to claim 2, characterized in that the material is further dried to a moisture level of under 2% and any attendant dust is separated from the moisture produced by the further drying.

Claim 6

The process according to claim 4, wherein the separation of the dust and moisture is obtained by condensing the moisture for the precipitation of the dust.

Claim 7

The process according to claim 1 characterized as a process of drying carbonaceous material.

Claim 8

The process according to claim 1 characterized as a process of drying coke fines.

Claim 9

The process according to claim 1 characterized in that the material is predried to a moisture level of approximately 10-12%.

Claim 10

The process according to claim 1 characterized in that the material is further dried to a residual moisture level of approximately 2% and the moisture produced out of the further drying is discharged without dust.

Claim 11

The process according to claim 1 characterized in that the material is further dried to a moisture level of under 2% and any attendant dust is separated from the moisture produced by the further drying.

Claim 12

The process according to claim 6 characterized in that coking coal is heated for drying at a temperature below the degasing temperature thereby to shorten the coking time.

Claim 13

The process according to claim 6 characterized in that generator coal is heated for drying at a temperature below the degasing temperature.

Claim 14

The process according to claim 1 characterized as a process of drying an initially slime like material.

Claim 15

The process according to claim 1 characterized in that the wet supply material is preheated with heat obtained by condensing the vapor from the discharged flue gases.

Claim 16

Apparatus for the predrying of wet, pulverulent material, while avoiding the generation of air borne dust, comprising: a burner (11) providing a flame and flue gases extending along an axis; a predrying drum (17) spacedly positioned from said burner and rotatable about said axis, said predrying drum receiving the wet, pulverulent material for exposing same to said gases; an inner drum (6) having one end (12) coupled to said predrying drum and the other end (10) coupled to said burner for receiving the burner flame and flue gases, said drum being rotatable about the axis; a means for rotating said predrying and inner drums; a casing spacedly, concentrically surrounding said inner drum for forming a chamber (4) closed with respect to said burner at the end adjacent said burner; said inner drum receiving predried material from said predrying drum and having perforations (13, 13') in the drum wall adjacent said one end communicating with the chamber (4) between said drum and casing for supplying the predried material into said chamber; a vapor discharge means (14) communicating with said chamber adjacent said one end of said drum; and a dried material discharge means (2, 3) communicating with said chamber adjacent the other end of said drum.

Claim 17

Apparatus for the predrying of wet, pulverulent material, while avoiding the generation of air borne dust, comprising: a burner (11) providing a flame and flue gases extending along an axis; a predrying drum (17) spacedly positioned from said burner and rotatable about said axis, said predrying drum receiving the wet, pulverulent material for exposing same to said gases; an inner drum (6) having one end (12) coupled to said predrying drum and the other end (10) coupled to said burner for receiving the burner flame and flue gases, said drum being rotatable about the axis; a means for rotating said predrying and inner drums; a casing spacedly, concentrically surrounding said inner drum for forming a chamber (4) closed with respect to said burner at the end adjacent said burner; said inner drum receiving predried material from said predrying drum and having perforations (13, 13') in the drum wall adjacent said one end communicating with the chamber (4) between said drum and casing for supplying the predried material into said chamber; a vapor discharge means (14) communicating with said chamber adjacent said one end of said drum; and a dried material discharge means (2, 3) communicating with said chamber adjacent the other end of said drum.

Claim 18

The apparatus according to claim 15 wherein said predrying drum includes means for moving the material axially along the drum and the outer surface of said inner drum includes means for moving said predried material axially through said chamber.

Claim 19

The apparatus according to claim 15 characterized in that an intermediate pipe is provided between said one end of said inner drum and the opposing end of said predrying drum.

Claim 20

The apparatus according to claim 17 characterized in that the section of said intermediate pipe lying between the opposing ends of the said predrying drum and said inner drum journals said drums.

Claim 21

The apparatus according to claim 16 characterized in that axially extending angled profiles are mounted on the outer surface of said inner drum for the transport of the predried material and for the supression of its movement upon the outer surface of inner drum wall and that a band formed helix is fastened to the angled profiles for surrounding said inner drum and for moving said predried material axially through said chamber.

Claim 22

The apparatus according to claim 19 characterized in that scrapers are provided on the helix contiguous with the casing.

Claim 23

The apparatus according to claim 20 characterized in that the scrapers contain cutters which are so arranged that their paths on the casing overlap without interstices.