煤化工污泥中水分赋存状态分析方法研究OA

Coal chemical sludge has high moisture content,high viscosity,and contains toxic and harmful substances.Its reduction and harmless disposal have become a challenge for the green and sustainable development of the chemical industry.In order to reveal the occurrence status of water in sludge and lay the research foundation for sludge disposal,differential scanning calorimetry(DSC)and low field nuclear magnetic resonance(NMR)methods were used to analyze the water forms in sludge.The results indicate that DSC method cannot accurately analyze the occurrence status of water in sludge.By using NMR testing method,the water in sludge can be divided into four types:intracellular water,ad⁃sorbed water,interstitial water,and free water.The analysis results show that the intracellular water content in chemi⁃cal sludge is 1.43％to 6.83％,adsorbed water content is 2.95％to 63.09％,interstitial water content is 31.04％to 94.23％,and free water content is 0 to 1.03％,distinguishing the water content in different states of sludge has impor⁃tant guiding significance for the study of water removal or bound water conversion in sludge.