Process for preventing the formation of harmful organic substanc

Details Process for preventing the formation of harmful organic substanc Process for preventing the formation of harmful organic substanc

1995-04-13

1996-12-24

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423240S, 4232453, 95132, 95142, C01B 1700

Patent

active

055871380

ABSTRACT:
The present invention is directed to a process for preventing the formation of dioxin and/or furan during combustion of composite combustible materials in a combustion chamber. The process includes passing the generated combustion gas in a flow from the combustion chamber to a dedusting device, cooled and purified while maintaining the SO.sub.3 content in the combustion gas flow from about 7 to about 500 mg/m.sup.3 and at a temperature of from about 300 .degree. to about 800.degree. C., The process allows at least surface regions of particles of meal dusts contained in the combustion gas to be converted to sulfates and thereby prevent formation of dioxins and furan. The invention also includes a steam generator for carrying out the process whose steel structures coming into contact with the combustion gases are either alloyed or coated with tungsten and/or vanadium on the combustion-gas side.

REFERENCES:
patent: 4220478 (1980-09-01), Schuff
patent: 4533364 (1985-08-01), Altman et al.
patent: 4681045 (1987-07-01), Dvirka et al.
patent: 4793270 (1988-12-01), Karasek et al.
patent: 4829911 (1989-05-01), Nielson
patent: 5011516 (1991-04-01), Altman et al.
patent: 5240470 (1993-08-01), Wright
patent: 5261931 (1993-11-01), Wright

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