Study on the Feasibility of Recycling Condensate Water of Lignite by Microwave Dehydration Treatment

Abstract

As a low-rank coal, the high moisture content of lignite need to be dehydrated and refined before combustion. To alleviate the water shortage situation of lignite region, this paper put forward a way of microwave dehydration to recycling the water out of lignite. By detecting the chemical oxygen demand, ammonia nitrogen, total phosphorus, hardness, ions, organic compounds of lignite, it can be concluded that the dehydration ratio of lignite reaches 70~80%, and the water quality as ammonia nitrogen, total phosphorus was close to industrial standard. While the chemical oxygen demand exceeded the standard scope as well as trace amount of poisonous metal elements and organic compounds causing cancer, this will become the main task of subsequent purification process.