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BoilersOnce-through 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 Hitachi Power Systems (MHPS) 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, MHPS sought to further improve steam conditions, culminating in delivery of the first ultra-supercritical variable pressure once-through boiler.

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

Specifications

2-Pass Boiler

Output Up to 1,050 MW
Main steam flow rate Up to 3,080ton/hr
Steam temperature Up to 600/610°C
Steam pressure Up to 25 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

Customer
TEPCO Fuel & Power, 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
(heater outlet)
Steam temperature
600°C
Reheat steam temperature
600°C
Steam pressure
24.6 MPaA
Fuel
Bituminous coal / subbituminous coal
Start of operation
2003 / 2013
Customer
TEPCO Fuel & Power, 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
(heater outlet)
Steam temperature
600°C
Reheat steam temperature
600°C
Steam pressure
24.6 MPaA
Fuel
Bituminous coal / subbituminous coal
Start of operation
2003 / 2013
Customer
RWE
Plant (Country)
Neurath Power Station (Germany)
Scope of Delivery
Boilers
Output
1,100 MW
Maximum continuous rating
2,870t/h
Steam conditions
(heater outlet)
Steam temperature
600°C
Reheat steam temperature
605°C
Steam pressure
27.2 MPaA
Fuel
German brown coal
Start of operation
2012
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
(heater outlet)
Steam temperature
538°C
Reheat steam temperature
566°C
Steam pressure
24.5 MPaA
Fuel
Subbituminous coal
Start of operation
2012

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