Lee Roy Anderson

US Patent:

50277235, Jul 2, 1991

Filed:

Jan 14, 1988

Appl. No.:

7/144714

Inventors:

Ronald R. Landreth - Crown Point IN
Lee R. Anderson - Griffith IN

Assignee:

Inland Steel Company - Chicago IL

International Classification:

F23B 700

US Classification:

110343

Abstract:

A method and apparatus are employed to reduce the sulfur dioxide produced by the combustion of a sulfur-containing fuel in a combustion chamber. Part of the combustion air is introduced into the combustion chamber with and closely adjacent the fuel. Another part of the combustion air is introduced into the combustion chamber above and downstream of the fuel and relatively remote therefrom under conditions when buffer the flame front and reduce peak flame temperatures therein. Finely divided limestone particles or the like are aspirated into the combustion chamber by the air introduced above the fuel and distributed thereby throughout the gases flowing downstream through the combustion chamber wherein the limestone particles are calcined to lime particles which react with the sulfur dioxide in the combustion reaction gases to produce calcium sulfate. There is no premixing of the particles and the aspirating air before they enter the combustion chamber. Various parameters are controlled to produce the desired results.

US Patent:

52463648, Sep 21, 1993

Filed:

Jul 5, 1990

Appl. No.:

7/548261

Inventors:

Ronald R. Landreth - Crown Point IN
Lee R. Anderson - Griffith IN

Assignee:

Inland Steel Company - Chicago IL

International Classification:

F23J 700

US Classification:

431 3

Abstract:

A method and apparatus are employed to reduce the sulfur dioxide produced by the combustion of a sulfur-containing fuel in a combustion chamber. Part of the combustion air is introduced into the combustion chamber with and closely adjacent the fuel. Another part of the combustion air is introduced into the combustion chamber above and downstream of the fuel and relatively remote therefrom under conditions which buffer the flame front and reduce peak flame temperatures therein. Finely divided limestone particles or the like are aspirated into the combustion chamber by the air introduced above the fuel and distributed thereby throughout the gases flowing downstream through the combustion chamber wherein the limestone particles are calcined to lime particles which react with the sulfur dioxide in the combustion reaction gases to produce calcium sulfate. There is no premixing of the particles and the aspirating air before they enter the combustion chamber. Various parameters are controlled to produce the desired results.

US Patent:

50484311, Sep 17, 1991

Filed:

Jul 5, 1990

Appl. No.:

7/548183

Inventors:

Ronald R. Landreth - Crown Point IN
Lee R. Anderson - Griffith IN

Assignee:

Inland Steel Company - Chicago IL

International Classification:

F23B 700

US Classification:

110343

Abstract:

A method and apparatus are employed to reduce the sulfur dioxide produced by the combustion of a sulfur-containing fule in a combustion chamber. Part of the combustion air is introduced into the combustion chamber with and closely adjacent the fuel. Another part of the combustion air is introduced into the combustion chamber above and downstream of the fuel and relatively remote therefrom under conditions which buffer the flame front and reduce peak flame temperatures therein. Finely divided limestone particles or the like are aspirated into the combustion chamber by the air introduced above the fuel and distributed thereby throughout the gases flowing downstream through the combustion chamber wherein the limestone particles are calcined to lime particles which react with the sulfur dioxide in the combustion reaction gases to produce calcium sulfate. There is no premixing of the particles and the aspirating air before they enter the combustion chamber. Various parameters are controlled to produce the desired results.