The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1992
Filed:
May. 20, 1992
George R Offen, Woodside, CA (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A method and apparatus for suppressing multiple pollutants is disclosed. The apparatus includes a slagging combustor which effectively reduces the bulk of the NO.sub.x and SO.sub.2 produced through the combustion of coal. The slagging combustor also converts the bulk of the noncombustible material in the coal into a vitrified waste product. Following utilization of their thermal energy, the combustion products from the slagging combustor are conveyed to a lignite coke system. The lignite coke system provides additional suppression of the NO.sub.x, SO.sub.2, and solid noncombustible byproducts. In addition, the lignite coke system suppresses the gaseous toxic pollutants that exit the slagging combustor with the combustion gases. The spent coke is recycled to the combustor where its fuel value is used to reduce raw fuel requirements and noncombustible materials captured by the coke exit the combustor as part of the vitrified slag. In sum, extremely efficient reduction of NO.sub.x, SO.sub.2 and solid noncombustible pollutants is realized, gaseous toxic pollutants are suppressed, and solid waste byproducts are in a vitrified form which will resist future leaching.