氯氧化二氧化硫废气制硫酸的物料与热量衡算

A CALCULATION OF HEAT AND MATERIAL BALANCE IN NEW TECHNOLOGY FOR PRAPARATION OF SULFURIC ACID FROM OXIDATION OF SULFUR DIOXIDE IN EXHAUST GAS BY CHLORINE

This paper describes the method and results in calculation of heat and materialbalance in new process for praparation of sulfric acid from oxidation of SO_2 in ex-haust gas by chlorine.According to the results in scale-up test,the calculation isbased on treating 10000m~3 per hour exhaust gas contain 1%SO_2 and on steady-stateapproximation.From the material balance,it is indicated that,after treatment of smoke gasdescribed as above,SO_2only 5.7kg/h and Cl_2(and HCl)3.1kg/h in tail gas which isfar low than national discharg standard,4850 ton 70% sulfuric acid can be annuallyrecovered from the gas.From the heat balance,the consuption of heat in the processcan be compensated by the sensible heat of smoke gas and reaction heat so that de-sired temperature can be maintained.It is proved that the process is run self-assis-tantly in energy.