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 97

Incorporated with Ozone Oxidization and Alkali Solution Adsorption

of our ozone generator were the pulse repetition frequency below 300 Hz, peak
voltage below 60 kV, pulse width of 300 - 500 ns, and ozone yield of 493.46 -
1081.09 g/(kWh). The result comparison between our pulse discharge ozone
generator and that of Samaranayake's group [1,2] is presented in Fig. 5.4. Obviously,
results from the two research groups are quite different. For the pulse discharge
ozone generator modified by our group, its performance is much better than that of
the generator in [1,2] . In detail, both the ozone concentration and yield rate greatly
increase (see results in both Figs. 5.3 and 5.4) and the needed voltage of the
discharge chamber is much lower when the flat type of ozone generator is applied,
in comparison with the line (helix)-cylinder type in [1,2] . Therefore, the lifespan
and reliability are improved clearly. Analytically, the ozone generator with flat
discharge chamber appears as a promising cost-effective, economical, and reliable
alternative.

70

60

Our experiment 100 pps
Out experiment 200 pps
Samaranayake s experiment 100 pps
Samaranayake s experiment 200 pps

Our experiment (100 pps)
Our experiment (200 pps)
Samaranayake's experiment (100 pps)
Samaranayake's experiment (200 pps)

50

,
,

40

30

20

10

0

-10

5 10 15 20 25 30

Peak voltage (kV)

Peak voltage (kV)

Fig. 5.4 Ozone concentration variation with peak voltage (oxygen source)
Note: Our experiments: 1 L/min flow rate and 1 mm gap; Samaranayake's experiments: 1 L/min flow rate
and 1 mm gap

5.3 Economic Analysis of the O 3 and FGD System

For the most strictest NO x emission standards of power plants in China (i.e., the
permissible NO x emissions of 100 mg/m 3 (at 6% O 2 ) for most of coal-fired boilers,
as of July 1, 2014), it is very tough to satisfy the demand with the help of those
existing deNO x technologies (such as SCR and SNCR). This means that a good
chance for adopt the advanced and promising O 3 and FGD technology appears,