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The coke oven by-product plant is an integral part of the by-product coke making process. In the process of converting coal into coke using the by-product coke oven, the volatile matter in the coal is vaporized and driven off. This volatile matter leaves the coke oven chambers as hot, raw coke oven gas. In a by-product coke oven the evolved coke oven gas leaves the coke oven chambers at high temperatures approaching 2000 deg F. This hot gas is immediately quenched by direct contact with a spray of aqueous liquor (flushing liquor). The resulting cooled gas is water saturated and has a temperature of 176 deg F. This gas is collected in the coke oven battery gas collecting main. Raw coke oven gas coming from the coke oven battery has 55% Hydrogen, 25% Methane, 6% Carbon monoxide, 3% Carbon Dioxide, etc.
MWM has got a very good experience on power Generation using Coke Oven Gases. Nearby Genoa, in Cairo Montenotte, on the Ligurian Riviera, Italiana Coke has specialized in the production of high quality coke, exclusively for use in the casting industry. The Gensets are generating 24 megawatt electricity, this being not enough, another MW is generated with the engines exhaust heat, producing saturated steam for a turbine, fixing the total output of the plant at an impressive mark of 25 MW. At Italiana Coke MWM realised the biggest energy generation plant on COG with reciprocating engines worldwide.
MWM has installed genset running in landfill site of Budenheim. The waste of the city of Mainz was disposed of, for decades. We think it is a good example of what recultivation can achieve. For the local authorities it was obviously an integral part of a decent waste treatment policy, as they have transformed the ground back into a recreation area. However, a landfill, after being actually closed, will still generate landfill gas for years to come. This is why a modular approach with MWM gensets is a sensible solution for landfills.