Simulation of mass and heat transfer in new phosphoric acid tower with circular water wall(II) Analysis of influence on heat transfer
The effects of parameters on maximum combustion temperature, smog exit temperature, maximum wall heat flux, averaged wall heat flux of a new phosphoric acid tower with circular water wall were discussed, including phosphorus consumption, excess-air coefficient, wall temperature and radiation absorption coefficient, with the mathematical model developed in Part Ⅰ.The predicted results showed that maximum combustion temperature, smog exit temperature, maximum wall heat flux and averaged wall heat flux would increase with increasing phosphorus mass flow rate when excess-air coefficient or air flow rate was constant.Under the condition of constant phosphorus mass flow rate, the smog exit temperature would increase slowly while other parameters would decrease with increasing excess air coefficient.Wall temperature had a remarkable effect on smog exit temperature, whereas its effect on other parameters was not obvious.In addition, radiation absorption coefficient had a remarkable effect on maximum combustion temperature and maximum wall heat flux in the new phosphoric acid tower.