Application and Economic Analysis of the Multi-Pollutants Removal Technology Incorporated with Ozone Oxidization and Alkali Solution Adsorption - Simultaneous Multi-Pollutants Removal in Flue Gas by Ozone - page 102

multi-pollutants removal technology incorporated with ozone oxidization and
alkali solution adsorption. An economic analysis of O 3 oxidization combined with
the existing desulfurization (mainly WFGD) and denitrification (OFA, reburning,
SCR, and so on) technologies was also provided. A pilot-scale ozone oxidation
system combined with chemical absorption was established to process a maximal
300 Nm 3 /h flue gas flow. Operational conditions of flue gas capacity 100 Nm 3 /h,
gas temperatures 100 - 300 °C, and ozone output 150 g/h were preferred. In the
ozone generation technology aspect, both the high-frequency and high-voltage
discharge method and the pulse discharge method can substantially increase ozone
concentration and yield. The economic analysis of multi-pollutants simultaneous
removal with ozone oxidization and alkali solution adsorption for a typical 300
MWe unit boiler suggests that: (i) oxygen needs be the gas source for the ozone
generation, instead of air, so as to reduce sharply the operation energy
consumption; and (ii) ozone oxidation must combine with OFA or reburning,
coupled with WFGD system, is approved as a promising cost-effective
multi-pollutants removal method.

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