Glass manufacturing – Processes – Fining or homogenizing molten glass
Patent
1996-11-12
1998-11-17
Griffin, Steven P.
Glass manufacturing
Processes
Fining or homogenizing molten glass
110210, 110212, 110214, 110345, 431 5, 423246, C03B 516, C03B 5237
Patent
active
058370285
ABSTRACT:
A method of operating a cross-fired regenerative glass furnace for melting flat glass so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, the method including supplying fuel in excess of that required for stoichiometric combustion to ensure that glass of the required quality at the required production rate is obtained, and that the waste gases leaving the furnace through the regenerators contain combustible material, and reacting the combustible material with sufficient air to ensure that the waste gases exiting to atmosphere contain permissible levels of combustible material and permissible levels of NOx. Alternatively, the furnace may be operated at substantially stoichiometric conditions and fuel is supplied to the waste gases as they leave the melting chamber. The invention also relates to a cross-fired regenerator glass furnace for use in the method. The invention further provides a method of reducing the emissions of CO in waste gases leaving a cross-fired regenerative glass furnace for melting flat glass, the furnace having sealed regenerators which act as heat exchangers, the method including removing CO from the waste gases in the regenerator by combusting CO in around 8% excess air, based on the combustion air for the supplied fuel, at a temperature greater than 650.degree. C.
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Bird David Alan
McIntosh Robin Maxwell
Quirk Richard
Shulver Ian Nigel William
Griffin Steven P.
Pilkington Glass Limited
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