Process for improving low-rank coal and apparatus therefor

Details Process for improving low-rank coal and apparatus therefor Process for improving low-rank coal and apparatus therefor

C - Chemistry, Metallurgy

10

L

202/6

C10L 9/08 (2006.01) C10B 57/02 (2006.01) C10L 9/00 (2006.01)

Patent

CA 1268444

Abstract: The present invention relates to a process and apparatus for improving low-rank coal. The process for improving low-rank coal comprises the steps of carbonizing low-rank coal, selectively separating a tar-rich gas mixture from the gas produced from the low-rank coal during the carbonization step, and bringing the gas mixture into contact with low-rank coal which has passed the carbonization step and cooled to thereby adhere the tar to the surface of the coal. The apparatus for improving low-rank coal comprises a unit for carbonizing low-rank coal, a unit for cooling low-rank coal which has passed the carbonization step, a unit for selectively separating a tar-rich gas mixture from the gas produced from the low-rank coal during the carbonization step, and a unit for bringing the gas mixture into contact with low- rank coal which has passed the carbonization step and cooled to thereby adhere the tar to the surface of the coal. Thus, the low-rank coal can be improved into coal having a low adherent moisture content and excellent moisture resistance.

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