Novel Technology to Treat Foul Condensate and NCG Gases in a Closed Loop System, 2000 Environmental Conference Proceedings
- K. K. Sandquist, E. Sandstrom -- A novel technology (patent pending) has been developed to treat contaminated condensate from black liquor evaporation plants and Non Condensible Gases (NCG) gases, both High Volume Low Concentration (HVLC) and Low Volume High Concentration (LVHC) in a combined closed loop concept. This is a new technology that is comprised of three process steps:
1. Stripping of sulfides and other volatile components from condensate
2. Regenerative Thermal Oxidation (RTO) of Stripper Off Gases (SOG)
3. Absorption of sulfur dioxide.
By integrating these three process steps in a closed loop cycle, the cleaning of condensate and NCG gases can be done with a very high efficiency, good heat economy, and minimal impact on the environment. In order to reduce the total water consumption in the mill, the metal and sulfide free condensate can be recirculated into the process.
Novel Technology to Treat Foul Condensate and NCG Gases in a Closed Loop System, 2000 Environmental