离心机对结晶与母液进行分离,由于在离心过程中不可能将水分全部脱除,晶体带水一般在2%~2.5%左右。假定离心分离后的晶体带水为2.5%(湿基),则干基带水为2.56%。假设离心残液带水中带入干盐量为Xkg,则离心结晶干料总是为(634.06+X)kg。离心残液带水量:(634.06+X)×2.56%则X=(634.06+X)×2.56%×25.86%/74.14%X=5.71kg结晶中带入KH2PO4的量:5.71×96.02%=5.48kg结晶中带入K2SO4的量:5.71×3.27%=0.19kg结晶中带入K2SiF6的量:5.71×0.33%=0.02kg结晶中带入K2HPO4的量:5.71×0.38%=0.02kg结晶带入水量(634.06+5.71)×2.56%=16.38kg结晶组成物料名称物料量(kg)分率%干基分率%KH2PO4639.1497.4199.90K2SO40.190.030.03K2SiF60.020.0030.003K2HPO40.020.0030.003不溶物杂质0.400.060.06∑干639.7797.50100H2O16.382.50∑656.15100母液组成物料名称物料量(kg)分率%分率%Kg/kgH2OKH2PO4466.2424.8396.020.335K2SO415.890.853.270.0114K2SiF61.590.080.330.0011K2HPO41.830.100.380.0013∑干485.5525.86100H2O1391.7574.14∑1877.30100七、母液循环的计算1、一次母液循环(1)混合母液加入反应液中,与反应液进行混合反应完成组成物料名称物料量(kg)分率%Kg/kgH2OKH2PO41105.3832.810.5260K2SO416.080.480.0077K2SiF61.610.05
全文预览
