Theoretic And Technical Study On Low-rank Coal Upgrading By Pipe Type Airflow Drier Method

The paper expatiated on reserves and distributing about world coal resource, especially on low-rank coal resource, and the need of its utilization. Aiming at low-rank coal utilization status home and abroad, it discussed low-rank coal upgrading mechanism, selected airflow dryness upgrading low-rank coal method, and analyzed principle of low-rank coal dryness upgrading process. From the results of coal sample upgrading basic experiments, low-rank coal upgrading infection factors and basic design datum were obtained. The line of low-rank coal upgrading technology was designed, and the parameter of test line main and assistant pulse airflow drier and other main equipments was put forward. Analyzing test line run index and upgrading products index, it present the best run condition under different coal sample and corresponding test line single and double run modes. The test line airflow dryness upgrading numerical value model was founded on basis of run data. According to test line best run condition parameter, low-rank coal upgrading industry line was designed.