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Incorporated with Ozone Oxidization and Alkali Solution Adsorption
(a)
(b)
Fig. 5.2
(a) Ozone oxidation and (b) chemical absorption equipment
As an active molecule but with a relatively long lifespan, Ozone can be
generated through discharging and then ejected into flue gas. The conventional
operational conditions of the system are flue gas rate of 100 Nm
3
/h, flue gas
temperature levels of 100 - 300 °C, ozone production of 150 g/h.
5.2 Economic Analysis of the Ozone Generation Technology
The ozone generation technology plays an important role in the simultaneous
removal of multi-pollutants. An effective ozone generation method usually
corresponds to low energy consumption, which determines mainly the economic
feasibility of this technology. Therefore, it is essential for cost-effective purpose to
explore new ozone generators. Table 5.2 shows comprehensive comparisons
between the commercial and proposed ozone generators.
Figs. 5.3(a) and 5.3(b) compare the ozone generation performance between a
commercial ozone generator and the developed one with high frequency and high
voltage (listed in Table 5.2). Both the ozone discharge chambers are of the
coaxial-cylindrical type. Generally, a commercial ozone generator operate with a
voltage of 4 - 5 kV, frequency of 1000 - 3000 Hz, and an ozone yield rates below
111.11 g/(kWh). As for us, the ozone generation experiments were conducted
with a voltage of 2.4 - 3.4 kV, frequency of 7.47 kHz, and an ozone yield rate
below 163.81 g/(kWh). As shown in Figs. 5.3(a) and 5.3(b), the ozone yield
increases with the oxygen flow rate, despite a continuous decrease appearing in
the ozone concentration, because of the oxygen dilution. Results in our generator
are definitely twice higher than those of the commercial one, not only in the ozone
concentration but also in the ozone yield.
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