Two new processes for the production of insoluble sulfur (IS) were studied in thispaper.One is low temperature polymerization process of sulfur at temperature less than 350℃ and under atmospheric pressure in the pres...Two new processes for the production of insoluble sulfur (IS) were studied in thispaper.One is low temperature polymerization process of sulfur at temperature less than 350℃ and under atmospheric pressure in the presence of catalyst promotor system,aiming at producing medium grade IS.Another is mixed solvent extraction process with a small amount of additive for the production of higher grade IS.In comparison with the old high temperature polymerization and single solvent (carbon disulfide) extraction processes respectively,these two new processes are lower in first cost and operation/maintainance cost,less energy consumption and safe in operation.展开更多
糠醛废水含1~2.5%的乙酸,直接外排,污染环境,浪费资源。通过60—80对膜组装的400×800 mm 电渗析器中型试验,回收了浓度为20%的乙酸,再经萃取—精馏得到99%工业乙酸,治理后的废水含酸量<0.02%,可安全排放及回用。本文探讨了影...糠醛废水含1~2.5%的乙酸,直接外排,污染环境,浪费资源。通过60—80对膜组装的400×800 mm 电渗析器中型试验,回收了浓度为20%的乙酸,再经萃取—精馏得到99%工业乙酸,治理后的废水含酸量<0.02%,可安全排放及回用。本文探讨了影响过程性能的因素,为安全操作、放大设计提供了依据。展开更多
The flow behavior of the bubble in gas/solid fluidized bed is studied in multi-scales.A hypotheses of taking dispersed bubble as the continuous medium and the hydromechanics expression based on volume flux are propose...The flow behavior of the bubble in gas/solid fluidized bed is studied in multi-scales.A hypotheses of taking dispersed bubble as the continuous medium and the hydromechanics expression based on volume flux are proposed.The mathematical model of radial porosity distribution in the dense zone is developed.The radial distribution of the porosity is parabolic in nature according to the theoretical calculation and the calculated data is consistent with experimental data satisfactorily.展开更多
文摘Two new processes for the production of insoluble sulfur (IS) were studied in thispaper.One is low temperature polymerization process of sulfur at temperature less than 350℃ and under atmospheric pressure in the presence of catalyst promotor system,aiming at producing medium grade IS.Another is mixed solvent extraction process with a small amount of additive for the production of higher grade IS.In comparison with the old high temperature polymerization and single solvent (carbon disulfide) extraction processes respectively,these two new processes are lower in first cost and operation/maintainance cost,less energy consumption and safe in operation.
文摘The flow behavior of the bubble in gas/solid fluidized bed is studied in multi-scales.A hypotheses of taking dispersed bubble as the continuous medium and the hydromechanics expression based on volume flux are proposed.The mathematical model of radial porosity distribution in the dense zone is developed.The radial distribution of the porosity is parabolic in nature according to the theoretical calculation and the calculated data is consistent with experimental data satisfactorily.