Method and apparatus for suppressing the deposition of carbonaceous material in a coke oven battery

A method to suppress the carbonaceous deposits in the vertical riser ducts of a regenerative coke oven battery comprising,

• introducing rich fuel gas into a header connected to vertical riser ducts of an on flue,
• simultaneously introducing air into the header connected to the vertical riser ducts of the on flues and into the header connected to vertical riser ducts connected to an off flue,
• said air introduced into said header connected to said on flue operable to dilute said rich fuel gas in said vertical riser ducts and suppress the deposition of carbonaceous material in said vertical riser ducts, and
• said air introduced into said header connected to said vertical riser ducts of said off flue operable to remove at least a portion of the carbonaceous material deposited in said vertical riser ducts.

A method to suppress the carbonaceous deposits in the vertical riser ducts of a regenerative coke oven battery comprising,

• connecting pairs of flues with a recirculation duct operable to recirculate a portion of the waste gas from the off flue to the on flue at a location adjacent the nozzles for supplying gas to said respective flues,
• introducing rich fuel gas into a header connected to the nozzles of on flues of said pairs of flues,
• simultaneously introducing a second gas into a header connected to the nozzles of off flues,
• said second gas passing through said nozzles and mixing said second gas with said waste gas flowing through said recirculation duct, and
• thereafter admixing said mixture of said second gas and waste gas with said rich gas flowing through said nozzles into said on flues to thereby suppress the deposition of carbonaceous material in the vertical riser ducts connected to said on flues.