Technical Upgrade of the Steam Line at the Coke Plant with Conversion to Waste Steam and Installation of a 1.3/0.6 MPa Reducing Unit
The project aims to reduce steam generation costs by optimizing the steam supply system at the Coke Plant through the use of secondary waste energy steam, or waste steam.
The site’s steam supply system had a surplus of waste steam at 1.3 Mpa of approximately 40 tons per hour, generated by the BOF gas cooler vessels at BOF Shops Nos. 1 and 2. This excess steam was previously vented into the atmosphere. At the same time, the steam generated at the coke dry quenching units for the Coke Plant’s internal needs was used inefficiently, as it was throttled from 4.0 MPa down to 0.6 MPa.
To address this, it was decided to modify the Coke Plant’s steam supply scheme: 40 tonnes per hour of 4.0 MPa steam would be redirected to the Power Plant Shop for electricity generation, and it would be replaced with 1.3 MPa waste steam from the BOF gas coolers.
Successful implementation of this project in 2024 reduced the procurement of natural gas by 22 million m3 per year.