Flue Gas Conditioning
Flue gas conditioning is the controlled injection of small quantities of sulfur trioxide into the flue gas stream, reducing the resistivity of the fly ash and permitting its collection in the existing precipitator. When flue gas conditioning is installed on units that have switched to lower sulfur coal, solid emissions are significantly reduced, complying with environmental regulations and utility standards. In addition, dust load in the FGD is reduced, leading to higher availability of the FGD and increased whiteness of the gypsum.
A compact, fully automatic flue gas conditioning system is installed without requiring a boiler outage.
The reduction in solid emission can be up to 80%.
Pentol flue gas conditioning units basically consist of a converter unit, a liquid sulfur storage tank and a pumping station. The whole system is manufactured in our workshop and is shipped fully assembled and tested.
The converter unit consists of the electrical and the mechanical instrumentation and machinery required to convert liquid sulfur into an SO
3 / air mixture.
Filtered ambient air is heated up well above the self-ignition temperature of sulfur by means of electrical heaters. In the sulfur burner, the sulfur ignites, burns and is converted to SO
3 by means of the Pentol TwinCat catalyser.
The SO
3 / air mixture is injected into the flue gas stream by means of injection probes with typical dosage rates of 10 to 15 ppm.
Two metering pumps (one for backup) feed the liquid sulfur to the converter unit.
Rental equipment is available for testing or for plants with limited lifetime.
