Study of the influence of regime factors on the kinetics of the dehydration process of iron (ii) sulfate heptahydrate using the filtration method

Abstract

The filtration method of gradual dehydration of Iron(II) sulfate heptahydrate hase been proposed. Based on the generalization of experimental data of hydrodynamics, the calculated dependence Euзовн=155∙Reзовн-0,55∙Hdч was obtained, which makes it possible to determine theoreticallypressure losses in the stationary layer of FeSO4·7H2O.According to the results of complex thermal analysis, the regularities of the gradual dehydration process of FeSO4·7H2O have been established in different temperature intervals. The temperature of 339K has been chosen, to implement the FeSO4∙7H2O dehydration process with the separation of the first three molecules of crystallization water, ensuring the preservation of the crystalline state of the product.The kinetics of moisture removal from FeSO4∙7H2Oat different heights of the material layer and velocities of heat agent movement have been investigated. Based on energy consumption calculations, the optimal parameters of the process were established: the height of the stationary layer Н = 60.10-3mand the fictitious velocities of the heat agent movement v0 =0,86 m/s.The filtration method of gradual dehydration of Iron(II) sulfate heptahydrate hase been proposed. Based on the generalization of experimental data of hydrodynamics, the calculated dependence Euзовн=155∙Reзовн-0,55∙Hdч was obtained, which makes it possible to determine theoreticallypressure losses in the stationary layer of FeSO4·7H2O.According to the results of complex thermal analysis, the regularities of the gradual dehydration process of FeSO4·7H2O have been established in different temperature intervals. The temperature of 339K has been chosen, to implement the FeSO4∙7H2O dehydration process with the separation of the first three molecules of crystallization water, ensuring the preservation of the crystalline state of the product.The kinetics of moisture removal from FeSO4∙7H2Oat different heights of the material layer and velocities of heat agent movement have been investigated. Based on energy consumption calculations, the optimal parameters of the process were established: the height of the stationary layer Н = 60.10-3mand the fictitious velocities of the heat agent movement v0 =0,86 m/s.