Method and apparatus for desulfurizing and denitrifying coal

Details Method and apparatus for desulfurizing and denitrifying coal Method and apparatus for desulfurizing and denitrifying coal

1990-04-12

1991-08-06

Willis, Prince E.

Fuel and related compositions

Coal treating process or product thereof

Removal of undesirable

44602, C10L 900, C10L 908

Patent

active

050374508

ABSTRACT:
An apparatus and process for desulfurizing and denitrifying coal by pyrolysis and subsequently treating the gaseous pyrolysis by-products with a solid sorbent to substantially reduce the release of SO.sub.x gases to acceptable levels. In one aspect of the invention, coal is pyrolyzed in the inner chamber of the desulfurization and denitrification apparatus to drive off the sulfur and nitrogen compounds contained therein. In another aspect of the invention, the gaseous by-products of pyrolysis are treated with a solid sorbent in the outer chamber of the desulfurization and denitrification apparatus to substantially desulfurize those gases. In a further aspect of the invention, the desulfurized gases, which contain nitrogen compounds, are combusted under controlled conditions to minimize the production of NO.sub.x gases.

REFERENCES:
patent: 3640016 (1972-02-01), Lee et al.
patent: 3909213 (1975-09-01), Sanders
patent: 4302207 (1981-11-01), Paspek
patent: 4387653 (1983-06-01), Voss
patent: 4824441 (1989-04-01), Kindig

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