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Sinter Plant – Cooler Waste Heat Recovery System (WHRS)

This is a system for recovering the sinter cooler’s high-temperature exhaust gas as steam, which can be used for power generation. Furthermore, reuse of the exhaust heat as the thermal source of sintered ore production will improve the productivity of sinter machines.

Solutions

Environmental Friendliness

  • 26 kW

    Power generated per sinter 1 t

  • 132 kg-steam

    Steam flow per sinter 1 t
    (2.1 MPa-G/319°C superheated steam)

Introduction of this system will allow up to about 60 % of the exhaust heat from the sinter cooler to be reused as steam or electricity.
Furthermore, in this system, the exhaust from the waste heat boiler, which is at a temperature of about 180℃, is reused in the cooler rather than released into the atmosphere.
This increases the amount of heat recovered in the boiler as well as decreases CO2 and dust emissions.

References

since 1978 19 sets (9 sets in Japan,10 sets overseas)

Supplied To Country Quantity Start Up
  • Asia・Oceania
  • Visakhapatnam Steel Plant India 1 set 2014
  • China Steel (CSC) Taiwan 2 sets 2003, 1990
  • Taiyuan Iron & Steel (TISCO) China 2 sets 1997
  • POSCO South Korea 5 sets 1993-1987

Technical Information

Exhaust gas recirculating exhaust heat recovery flow

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Advantages of a recirculating system:
During recovery of exhaust heat from cooler exhaust gas, a recirculating system returns exhaust gas that has decreased in temperature in heat exchange to the cooler, then uses it again as coolant gas for the sinter. This makes a recirculating-type system more efficient than a non-recirculating-type system.