PURPOSE: To efficiently recover waste gas, by injecting medium-pressure ammonia liquor into a curved pipe in the neighborhood of the riser of a coke oven and introducing air from a raw material charging port into the coke oven to remove deposited carbon therein by burning and at the same time to recover gases formed.
CONSTITUTION: The top of a curved pipe 2 through which the top of the riser 1 of a coke oven is connected to a dry main 3, is provided with an ammonia liquor-spraying nozzle 4 which is connected through a tube 5 and a coke to a high-pressure ammonia liquor inlet pipe 7, a low- pressure ammonia liquor inlet pipe 8 and a medium-pressure ammonia liquor inlet pipe 12. After the completion of dry distillation in the coke oven, pressure in the curved pipe 2 measured by a pressure guage, the position at a raw coal charging port through which air tube burned is introduced, and the time which has elapsed after the termination of coking are input into a computer 14 to calculate the optimum air amount to be introduced. According to the calculated value, the opening of a controlling valve 16 is controlled, and medium-pressure ammonia liquor under a pressure of 7W20kg/cm2 is injected through a nozzle 4 into the pipe, whereby the optimum amount of air is introduced into the oven to remove deposited carbon therein by burning, and waste gas is recovered through the riser 1, the curved pipe 2 and the dry main 3.
KATOU TOMONORI
KOUMURA SEIJI
FUJIMURA TAKEO
| JPS5550261A | 1980-04-11 | |||
| JPS5442147A | 1979-04-03 |