Once-through Boilers

Boilers

Overview

Once-through boilers are able to produce steam at higher pressures and temperatures than drum boilers.

In thermal power plants, raising steam conditions (pressure and temperature) can enable efficiency gains in power generation equipment, allowing an operator to reduce its fuel consumption and CO2 emissions. Mitsubishi Power delivered its first supercritical pressure once-through boiler in 1968, and followed up in 1981 with delivery of the first supercritical variable pressure once-through boiler. In 1993, Mitsubishi Power sought to further improve steam conditions, culminating in delivery of the first ultra-supercritical variable pressure once-through boiler.

Mitsubishi Power boasts an extensive delivery track record for both supercritical and ultra-supercritical variants and conditions to deliver highly reliable boilers.

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Specifications

  • 2-Pass Boiler
    Output Up to 1,070MW
    Main steam flow rate Up to 3,210ton/h
    Steam temperature Up to 600/610°C
    Steam pressure Up to 31 MPa
  • Tower Boiler
    Output Up to 1,100 MW
    Main steam flow rate Up to 2,939ton/hr
    Steam temperature Up to 600/620°C
    Steam pressure Up to 30.5 MPa

Delivery Records

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    Customer JERA Co.,Inc.
    Plant (Country) Hitachinaka Thermal Power Station Units 1 and 2 (Japan)
    Scope of delivery Boilers, turbines and generators (ETK)
    Output 1,000 MW x 2
    Maximum continuous rating 2,870t/h
    Steam conditions Main steam temperature 600°C
    Reheat steam temperature 600°C
    Main steam pressure 24.6 MPaA
    Fuel Bituminous coal / subbituminous coal
    Start of operation 2003 / 2013
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    Customer JERA Co.,Inc.
    Plant (Country) Hirono Thermal Power Station Units 5 and 6 (Japan)
    Scope of delivery Boilers, turbines and generators (ELT)
    Output 600 MW × 2
    Maximum continuous rating 1,770t/h
    Steam conditions Main steam temperature 600°C
    Reheat steam temperature 600°C
    Main steam pressure 24.6 MPaA
    Fuel Bituminous coal / subbituminous coal
    Start of operation 2003 / 2013
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    Customer RWE
    Plant (Country) Neurath Power Station (Germany)
    Scope of delivery Boilers
    Output 1,100 MW
    Maximum continuous rating 2,870t/h
    Steam conditions Main steam temperature 600°C
    Reheat steam temperature 605°C
    Main steam pressure 27.2 MPaA
    Fuel German brown coal
    Start of operation 2012
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    Customer PT Paiton Energy
    Plant (Country) Paiton III Thermal Power Plant (Indonesia)
    Scope of delivery Full turnkey
    Output 866 MW
    Maximum continuous rating 2,695t/h
    Steam conditions Main steam temperature 538°C
    Reheat steam temperature 566°C
    Main steam pressure 24.5 MPaA
    Fuel Subbituminous coal
    Start of operation 2012