本文選題：三水碳酸鎂　切入點(diǎn)：過濾　出處：《過程工程學(xué)報(bào)》2017年06期 　論文類型：期刊論文

【摘要】：考察了顆粒特征(尺寸和形狀)和操作條件(過濾差壓、離子強(qiáng)度、漿液固體濃度和過濾溫度)對(duì)三水碳酸鎂沉降、過濾和脫水性能的影響.結(jié)果表明,三水碳酸鎂的沉降速率受離子強(qiáng)度和漿液固體濃度影響明顯,過濾性能與離子強(qiáng)度無關(guān),提高漿液固體濃度和過濾溫度、增加顆粒尺寸和降低過濾差壓大均有利于改善三水碳酸鎂的過濾性能;三水碳酸鎂脫水性能的提高有賴于高的過濾差壓和高的漿料濃度.基于實(shí)驗(yàn)數(shù)據(jù),通過回歸計(jì)算得到三水碳酸鎂濾餅的壓縮系數(shù)和孔隙分布因子,采用Happel模型以三水碳酸鎂的顆粒尺寸、濾餅的平均孔隙率及其它顆粒特征數(shù)據(jù)對(duì)三水碳酸鎂濾餅比阻進(jìn)行模擬計(jì)算,結(jié)果與實(shí)驗(yàn)數(shù)據(jù)一致性高,表明該模型可用于三水碳酸鎂濾餅比阻的預(yù)測.
[Abstract]:The effects of particle characteristics (size and shape) and operating conditions (filtration differential pressure, ionic strength, slurry solid concentration and filtration temperature) on the deposition, filtration and dehydration properties of magnesium carbonate trihydrate were investigated. The sedimentation rate of magnesium carbonate trihydrate is obviously affected by ionic strength and solid concentration of slurry, the filtration performance is independent of ionic strength, and the solid concentration of slurry and filtration temperature are increased. Increasing particle size and decreasing filtration differential pressure can improve the filtration performance of magnesium carbonate trihydrate, and the improvement of dehydration performance of magnesium carbonate trihydrate depends on high filtration differential pressure and high slurry concentration. The compression coefficient and pore distribution factor of magnesium carbonate trihydrate filter cake were calculated by regression. The particle size of magnesium carbonate trihydrate was calculated by Happel model. The average porosity and other particle characteristics of the filter cake were simulated and calculated for the specific resistance of the cake. The results were in good agreement with the experimental data, which indicated that the model could be used to predict the specific resistance of the cake.
【作者單位】： 中國科學(xué)院過程工程研究所綠色過程與工程重點(diǎn)實(shí)驗(yàn)室;北京安珂羅工程技術(shù)有限公司;
【基金】：Supported by National Natural Science Foundation of China(No.21076212,21076213) National Basic Research Program of China(973)(No.2007CB613501;2009CB219904)
【分類號(hào)】：TQ132.2
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本文編號(hào)：1637120