煤焦油原料脱水除盐过程研究及动力学模型验证
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摘要
以陕西某厂中低温煤焦油为原料,考察了煤焦油脱水除盐过程中的注水洗涤温度、洗涤过程注水量、洗涤级数、洗涤停留时间、洗涤器结构、分水方式对脱水除盐效果的影响,结果表明当洗涤温度为80℃、洗涤工艺过程注水量为8%～15%、洗涤级数为2～4级、洗涤停留时间为0.8～1.6min、采用高效注水洗涤构件、分水方式采用聚结分离方式时,能够取得最佳的脱水除盐效果。建立了煤焦油脱水除盐动力学模型,用Matlab软件拟合出煤焦油脱水除盐过程的动力学参数,并采用实验数据对模型进行了验证,结果表明高效聚结分离器分水的实测值与模型预测值拟合度较好,说明该方法更适合中低温煤焦油原料的脱水除盐,可为工业应用提供参考。
Medium and low temperature coal tar from a Shaanxi factory is taken as raw material,the effects of washing-water injection temperature,injection rate,washing stag numbers,residence times and device structure,and water separation method on the deep dehydration and desalination of coal tar are investigated.The deep desalting results showed that at the water injection temperature of 60—80 ℃,the number of washing stages of 2—4,water addition rate of 8%—15% of the oil feed,the water separation time of 0.8—1.6min,the better dewatering effect can be obtained in a coalescing separator.A kinetic model of dewatering and desalting of coal tar was established;the parameters of the model were fitted out with Matlab software and verified by real experiments.The results showed that the measured value and predicted value of the model are fit well,which indicates that this method is more suitable for the dewatering and desalting of coal tar raw materials.
Medium and low temperature coal tar from a Shaanxi factory is taken as raw material,the effects of washing-water injection temperature,injection rate,washing stag numbers,residence times and device structure,and water separation method on the deep dehydration and desalination of coal tar are investigated.The deep desalting results showed that at the water injection temperature of 60—80 ℃,the number of washing stages of 2—4,water addition rate of 8%—15% of the oil feed,the water separation time of 0.8—1.6min,the better dewatering effect can be obtained in a coalescing separator.A kinetic model of dewatering and desalting of coal tar was established;the parameters of the model were fitted out with Matlab software and verified by real experiments.The results showed that the measured value and predicted value of the model are fit well,which indicates that this method is more suitable for the dewatering and desalting of coal tar raw materials.
引文
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[3]李冬,李稳宏,高新,等.中低温煤焦油加氢改质工艺研究[J].煤炭转化,2009,32(4):81-84
[4]庞耀龙,许海媛.中低温煤焦油加氢工艺技术研究[J].中国化工贸易,2014,6(20):188-191
[5]刘建明,杨培志,曹祖宾,等.中低温煤焦油延迟焦化的工艺研究[J].燃料与化工,2006,37(2):49
[6]王红岩,李春山.中低温煤焦油加氢催化剂及工艺研究[D].北京:中国地质大学,2011
[7]焦学瞬,贺明波.乳化剂与乳化剂性质、制备及应用[M].北京:化学工业出版社,2007:108-119
[8]李宏,赵立党,李冬,等.煤焦油脱水动力学[J].化学工程,2011,39(9):57-60
[9]王军策,李冬,李稳宏,等.煤焦油在电场中的脱水动力学研究[J].石油化工,2012,41(5):533-540
[10]马伟,李冬,李稳宏,等.中低温煤焦油加氢脱金属动力学研究[J].石油化工,2010,40(7):49-52