Passamaquoddy Innovative Clean Coal Technology Program: Public design report

Technical Report · Sun Aug 01 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/10133385· OSTI ID:10133385

The Passamaquoddy Technology Recovery Scrubber{trademark} was conceived and developed specifically to address two problems experienced by the Dragon cement plant; meeting increasingly stringent gas emission limits for sulfur dioxide, and disposing of kiln dust, containing alkali oxides, which had to be wasted in order to avoid kiln operating and product quality problems. The idea involved making the kiln dust into a slurry in order to leach out the species (primarily potassium and sulfur) which rendered it unacceptable for return to kiln feed. This slurry, the liquid part of which is an alkaline solution, acts as a scrubbing reagent for SO{sub 2} in the flue gas while CO{sub 2} in the gas serves to precipitate soluble calcium and release sulfate for combination with the potassium. The effect of the process is to scrub SO{sub 2} from kiln flue gas, extract the volatile species from the dust allowing it to be returned to the kiln, and yield a leachate comprising potassium sulfate which can be crystallized (using heat recovered from the flue gas) and sold as fertilizer. Apart from widespread application in the cement industry, it was evident that, if the process could be demonstrated, its potential would extend to any plant burning fossil fuel where an alkaline waste either occurs intrinsically or can be juxtaposed. Obvious candidates appeared to include the pulp and paper industry and waste incineration. The chemistry was proved in a 1/100th scale pilot plant using actual kiln dust and a slip stream of kiln gas. A full scale demonstration installation was commissioned in 1989 by CDN (USA), the owners of the Dragon plant with the financial support of the US Department of Energy under its innovative Clean Coal Technology Program.

• Research Organization: Passamaquoddy Tribe, Thomaston, ME (United States). Passamaquoddy Technology
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC22-90PC89657
• OSTI ID: 10133385
• Report Number(s): DOE/PC/89657-T2; ON: DE94008316; BR: AZ0403030
• Resource Relation: Other Information: PBD: Aug 1993
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CEMENT INDUSTRY
KILNS
FLUE GAS
DESULFURIZATION
SCRUBBERS
CHEMICAL REACTIONS
SULFUR DIOXIDE
REMOVAL
ALKALI METAL COMPOUNDS
POTASSIUM SULFATES
CRYSTALLIZATION
US CLEAN COAL TECHNOLOGY PROGRAM
DEMONSTRATION PROGRAMS
DUSTS
RECYCLING
FERTILIZERS
WASTE PRODUCT UTILIZATION
200202
320305
NOXIOUS GAS AND PARTICULATE EMISSIONS
INDUSTRIAL WASTE MANAGEMENT