| 摘要 |
: 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 lowrank 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. |
