水热解过程对提质褐煤液体产物的影响

对来自内蒙古的白音华褐煤进行了一系列水热解实验,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、总氮、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.

Effect of processing conditions on organics and inorganics in wastewater during hydrothermal treatment of a low-rank coal

A series of hydrothermal treatment experiments for Bai-Inhua 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.