Reduction of byproduct-gas emissions from a coking-oven chambers

A method of operating a coke-oven battery having a hot coking chamber with

• at least one closable door through which a compressed-coal block can be passed,
• a closable connection to a crude-gas manifold, and
• a closable connection to a byproducts-gas manifold, the method comprising the steps of:
• opening the door of the chamber and pushing a compressed-coal block into the chamber such that the block and ambient oxygen together create byproduct gases in the chamber;
• while the door is opened, aspirating the byproduct gases from the chamber into the byproduct-gas manifold while preventing the byproduct gases from entering the crude-gas manifold;
• withdrawing the aspirated byproduct gases from the byproduct-gas manifold and dedusting and combusting the withdrawn byproduct gases;
• closing the door when the block is inside the chamber such that oxygen no longer is admitted into the chamber;
• thereafter coking the block in the chamber to generate crude gas while aspirating the crude gas into the crude-gas manifold and preventing the crude gas from entering the byproduct-gas manifold;
• and
• withdrawing the aspirated crude gas from the crude-gas manifold and scrubbing the withdrawn crude gas.

A coke-oven battery comprising:

• a plurality of hot oven chambers arrayed next to each other and having doors on a machine side and on a coke side,
• a pusher machine movable on the machine side along the battery, and
• a crude-gas manifold for discharging crude gases that form during coking inside the closed oven chambers,
• means for introducing a block of compressed coal by the pusher machine into an oven chamber that is open on the machine side, and after the coking process for removing coke from the oven chamber that is open on the coke side,
• a separate byproduct-gas manifold for the discharge of byproduct gases released during the introduction of the compressed-coal blocks into the hot oven chamber, and
• flow blockers connecting the byproduct-gas manifold and the crude-gas manifold to the oven chamber and to the byproduct-gas manifold and the crude-gas manifold, the flow blockers being alternately actuated such that the byproduct gases that form when charging the oven chambers are only conducted to the byproduct-gas manifold and not to the crude-gas manifold and the gas-treatment system and the crude gases that form for during the coking action inside the closed oven chambers are only conducted to the crude-gas manifold;
• and
• means connected to the byproduct-gas manifold for removing dust from and incinerating the byproduct gases.