Top Pressure Recovery Turbine (TRT)

Sectors
Objective
Opportunities enabled
Country
Japan

This system generates electric power by employing the heat and pressure of blast furnace top gas to drive a turbine generator. After the blast furnace gas is used in power generation, it is used as a fuel in iron and steel manufacturing processes. Blast fumace gas (BFG) has a pressure of 0.2-0.236 MPa (2-2.41 kg/cm2) and temperature of approx. 200 C at the fumace top.
The system comprises dust collecting equipment, a gas turbine, and a generator. Generating methods are classified as (1)wet or (2)dry depending on the BFG purification method. Dust is removed by Venturi scrubbers in the wet method and by a dry-type dust collector in the dry method. When dust is treated by the dry method, the gas temperature drop is small in comparison with the wet method, and as a result, generated output is at maximum 1.6 times geater than with the wet method

Organisation providing the technology
The Japan Iron and Steel Federation
Benefits
  • Fuel savings: 50 kWh/t-pig iron
  • CO2 Reduction: 45.0 kg-CO2/t-pig iron
Co-benefits

Excellent operational reliability, abrasion resistant

Differentiators

A pressure of 0.2-0.236 MPa (2-2.41 kg/cm2) and temperature of approx. 200 C at the fumace top

Investments required
  • Equipment cost: JPY 1400 million (7MW)
  • Construction cost: JPY 400 million
  • Payback time: 3.6 years
Contact

The Japan Iron and Steel Federation

Tel: +81-3-3669-4837

Email: [email protected]