Study On Emission Of SO_X From Sulfide-Organic Wastewater Incinerated In Fluidzed Bed

Along with the industry technical developing continuously, the production processes generate a lot of high concentration organic waste liquids,which discharge from the following industrial fields: Chemical industry, electronics industry, pesticide industry, food industry, leather industry, etc. According to the request of our country environmental protection laws, above liquids must dispose harmlessly before discharging to environment. Compared with other methods, incineration has the advantages of high destruction and removal efficiency, possibility of heat recycle, ease to industrial application and so on. However, the acid gas released from combustion can erode facilities and be likely to pollute atmosphere subsequently. Therefore, investigation of the SOx yielding from gas seems meaningful to the incineration treatment.A new SO2 and SO3 measurements are put forward to diagnose emissions problems. The method is simple and rapid, gives a satisfactory results. The correlation coefficient of standard line is 0. 99915. Its relative standard deviation is less than 5%, and the recovery is 96%~104%. The major advantage of this method is that it provides reliable and reproducible SO3 and SO2 values with minimal interference from high SO2 concentration.In the test work, experiments were conducted to investigate SOx concentration profiles along the influences of temperature and excess air in the temperature range from 750℃to 900℃. The waste water contained dilute vitriol is incinerated in a bench scale fluidized bed, the results indicate that SOx concentration is significantly influenced by temperature and oxygen concentration. The SO2 concentration profiles increase progressively with rising temperature and decreases very rapidly with the increasing of oxygen concentration in flue gas. When waste water containing p-aminobenzoic acid,incinerated in fluidized bed,the results show that the conversion ratio of p-aminobenzoic acid to SO2 increases with rising temperature and decreases gradually with rising oxygen concentration.