• The waste heat recovery power plant recovers heat from the high-temperature exhaust gas discharged from various plants, and generates electric energy.
  • Many cement plants installed the system because of its excellent energy-saving effects.
  • The system is being used to recover waste heat not only at cement plants but also at steel-making and non-ferrous smelting plants.












Waste Heat Recovery Power Generator (Conch Cement in China)



  • The priciple is explained based on waste heat recovery power plant for cement plants where many system have been install.
  • The waste heat recovery recovery power plant for cement plants consists of two waster recovery boiler - a PH boiler and a AQC boiler - both of which boiler are installed in the waste gas line.
  • The PH boiler recovers waste heat from the preheater used for pre-heating raw materials (Boiler inlet gas temperature:320 oC).
  • The AQC boiler waste heat from the air quenching cooler that quenches baked clinker ((Boiler inlet gas temperature: 360ºC). A new gas take off point is installed at high gas temperature side on the AQC for high efficiency.










System diagram of heat recovery power plant for cement plants


  • Self - developed Technology
  • Cement plants have reduced electric energy used at the entire plant by 30%
  • At a standard plant where daily production of clinker is 5,000 tons, 9,000 kW can be generated at the
    generator terminal worth ¥550,000,000 annually (assuming the unit price of electric energy is ¥7.9/kWh).
  • In terms of CO2 emission, this reduction is equivalent to 54,000 tons.