Principle of Multi-Pollutants Removal Technology in Flue Gas by Ozone - Simultaneous Multi-Pollutants Removal in Flue Gas by Ozone - page 31

developed in Europe for more than 30 years.
3) Scrubber. Ozone is injected into the tube by instruments similar to those
employed in selective catalytic reduction systems.
4) Wet removal unit. In this unit, Ca(NO 3 ) 2 is produced from the FGD
system that uses Ca.

Ta b l e 2. 1 Water solubilities of main pollutants in flue gas (g/100 g water)

Species 0 °C 20 °C 40 °C 60 °C 80 °C 100 °C

NO 0.00984 0.00618 0.00440 0.00324 0.00199 0

NO 2 High High High High High High

SO 2 22.83 11.29 5.41

SO 3 High High High High High High

Hg Null Null Null Null Null Null

Dissolvable in
acid and
alkaline

5.2×10 3 HgO

HgCl 2 3.6 6.5 10.2 16.2 30.0 61.3

Hg 2 Cl 2 0.00014 0.00020 0.00070

Note: <0.01, null; 0.01-1, slightly soluble; 1-10, soluble; >10, highly soluble

Emission free
flue gas

Flue gas Water steams Dilute salts

Make-up water
Ozone
destruction
scrubber

Flue gas

Condenser

Oxidizer duct

Sodium
carbonate

To sewer

LTO process

Fig. 2.1 Diagram of a typical multi-pollution control technology using ozone

The following methods can be applied to eliminate the nitrates produced from
the system:
Ca(NO 3 ) 2 and CaCl can be processed in available ash pits and landfills.
Ca(NO 3 ) 2 and CaCl can be processed in wastewater treatment.
Ca(NO 3 ) 2 and CaCl can be processed by using metals to produce fertilizers.