A series of hydrothermal treatment experiments for Bai-lnhua lignite from Inner Mongolia were conducted in this article. The effect of processing temperature and coal slurry concentration were studied by measuring TOC, COD, BOD5, total nitrogen, ammonia nitrogen, Cl-, SO42- and Ph value of the waste water after hydrothermal treatment. The processing temperature had a significant effect on the carbon and nitrogen content in the wastewater, as the processing temperature increases from 200℃ to 350℃, the carbon and the nitrogen content increase more than 20 times and 30 times separately. The slurry concentration had a significant effect on the Cl- and SO42- content in the wastewater, which increased with the increasing coal slurry concentration. The processing temperature shall be lower than 350 ℃, and the coal slurry concentration shall be identified with the consideration of the equipment material.%对来自内蒙古的白音华褐煤进行了一系列水熟解实验,分析不同温度和初始水煤浆浓度对水热解产物过滤出的液体的影响.分析了液体中TOC、COD、BOD5、总氯、氨氮、Cl、SO42的含量以及溶液的pH值.结果显示,水热解温度对于废液中的碳和氮含量影响较大,水热解温度从200℃增加到350℃时,水热解温度的升高,碳和氮分别增加了20多倍和30多倍；初始水煤浆浓度对Cl和SO42的含量影响较大,随着初始水煤浆浓度的升高,Cl和SO42逐渐增多.水热解温度应低于350℃,初始水煤浆浓度应综合考虑设备材质来选择.
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