Waste Gases Utilization and Power Generation in Iron and Steel Works

In iron and steel works, byproduct gases - blast furnace gas (BFG) and coke oven gas (COG) - are widely flared and vented to the atmosphere without utilization. On account of this, it is an important task for the iron and steel works to sufficiently and effectively utilize BFG and COG so as to reduce waste gases emissions and save energy. On the other hand, the power generated through combusting waste gases will replace the major quantity of electricity that could have been generated by greenhouse gases (GHG) intensive fossil fuel power plant, thus GHG emission reductions could be achieved. In this study, the project of waste gases utilization for Combined Cycle Power Plant in Handan Iron & Steel Group Co., Ltd is used as a case to reveal the improved efficiency of energy and CO₂ emission reductions. The analyses are conducted based on using the ACM0004 methodology of Clean Development Mechanism "CDM". It is found that the expected annual power generation is 677,400MWh, which meets 36% electricity needs of the owner. The project will displace an equivalent amount of annual power currently drawn from the grid, leading to emission reductions of approximately 665,545 tons CO₂ equivalent annually.