Study On The Method Of Calcium Sulfite Desulfurization

AbstractAiming for the scaling problem lying in wet desulfuriZation withlime slurry which has been widely aPplied, a method ofdesulfuriZation with calcium sulfite is stUdied. The method can insuredesulfuriZation system to be run economically and teliab1y, which isa novel indirect lime-method with Ca-contalned material asdesulfuriZation agent. Our research aims at theoretica1ly andpractically solving the scaling problems and pushing wetdesulfuriZation to be developed in our countryReaction mechanism of lime wet desulfuriZation under varyingthe value of pH has been studied by Penman teacher for the first timebefore. The exPerirnental results show that main reactions duringdesulfuriZation are different under varying the value of pH. Based onthe study, a method of calcium sulfite desulfurization is put forward,and reaction mechanism is thorough studied in the paPeL via singlefactof, the effectS of different conditions on desulfuriZaion efficiencywith the new method are probed into, and the optdrim conditions areobtained. On the basis of many exPeriment datu, a math model israised, Which is a reference for engineering design and predictingdesulfuriZaion efficiency. The pilot-plant exPerimefltal results showthat desulfurization efficiency can be over 87% under the optimumconditions.The saforation concentration (0.6126 moljL under thetempertae of 30C) and decomPose caPability of calcium bisulfiteunder different temPeratUre and concentration are studied for the firsttime, and a math model is developed correlating decomPosedtemPerthee and correspondence concentration, which providetheoretic basis and imPortan design parameter for having beenaPplied method of calcium sulfite desulhozation in industryMoreover, the study on the effects of different conditions on calcium sulfite oxidation reaction is carried out, and the experimental results indicate that the value of p1-I and reaction temperature are the most principal factors. Under the optimum conditions, the oxidation efficiency is more than 96%. When keeping on operating, the concentration of calcium sulfite is lower in oxidation tower and no decompose side reaction of HSO7 begets. So the craft may be industrialized.