兰炭生产过程中固体废物的产生与利用现状分析

在对国内兰炭生产工艺流程应用及现状介绍的基础上，概括总结了旧式低温干馏阶段和现阶段兰炭生产过程中固体废物的产生节点、种类、性质和主要处置方式。结果表明，旧式低温干馏阶段，兰炭生产过程中产生的固体废物主要包括煤筛分破碎工序产生的末煤和煤矸石、筛焦工序产生的焦粉、焦油冷却收集系统产生的焦油渣等；现阶段，兰炭生产过程中产生的固体废物主要包括煤筛分破碎工序产生的末煤和煤矸石以及破碎过程中经除尘器收集的煤尘、筛焦工序产生的焦粉、废水处理污泥、焦油冷却收集系统产生的焦油渣、脱硫工序产生的脱硫残液等。其中末煤、煤矸石、煤尘、焦粉作为一般工业固废全部综合利用，废水污泥、焦油渣、脱硫残液主要掺入原料煤中自行消化处置。

Situation analysis of solid waste generation and utilization in semi coke producing

Based on introduction of current domestic application of semi coke producing, Generated nodes, species, properties and main disposal of solid waste at the old low temperature carbonization stage and the present stage are summarized. The analytical results show that there are four kinds of solid wastes in semi coke producing at the old low temperature carbonization stage, including pulverized coal, gangue, coke powder, and tar slag. There are seven kinds of solid wastes in semi coke producing at the present stage, including pulverized coal, gangue, coal dust, coke powder, wastewater treatment sludge, tar slag, and desulfurization residues. Pulverized coal, gangue, coal dust and coke powder are completely recycled as general industrial solid waste. Wastewater treatment sludge, tar slag and desulfurization residues are incorporated into the raw coal by the semi coke manufacturers who produce these solid wastes.