原料煤吸附预处理煤制油废水的试验研究

Experimental study on pretreatment of wastewater produced by coal-to-oil process through adsorption with raw coal

摘要: 为了探究原料煤吸附预处理煤制油废水工艺的可行性，开展了吸附条件优化、多段串联吸附对吸附效能的影响研究。研究结果表明：在煤粉粒级为＜0.074mm，煤粉添加量为12.5g，吸附时间为30min条件下，煤粉对COD_Cr、氨氮和挥发酚的去除率分别为36.97%、28.92%和38.77%；四段吸附串联后，污染物的去除率分别为86.01%、69.05%和88.78%，煤粉吸附后表面未发生明显变化。原料煤吸附预处理煤制油废水是一种潜在的废水预处理工艺，具有较好的应用前景。

Abstract: In order to explore the feasibility of making pretreatment of wastewater produced in coal-to-oil process through adsorption with raw coal, work is made on the optimization of adsorption conditions as well as the effect on adsorption efficiency produced by multi-stage series adsorption processes.Test result shows that with an addition of 12.5 g of＜0.074mm pulverized coal and an adsorption time of 30 minutes, the removal rates of COD_cr, ammonia nitrogen and volatile phenol are 36.97%, 28.92% and 38.77% respectively; after the 4-stage tandem adsorption process, the removal rates of the above-mentioned pollutants are seen to go up to 86.01%, 69.05% and 88.78% respectively; and after adsorption, the functional groups on coal surface show no noticeable changes.It proves to be a potential process with good application prospects for pretreatment of such wastewater.