MHI Delivers Steam Generator with World's Highest Combustion Performance for Tsuruga Thermal Power Station |
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MHI has delivered a 700 MW steam generator with the world's highest combustion performance to the site of the Tsuruga Thermal Power Station of Hokuriku Electric Power Co., Inc., Japan. The station was developed with a total capacity of 1,200 MW as the extension of an existing 500 MW unit of which steam generator was also delivered by MHI in 1991.
 The 700 MW coal-fired supercritical sliding pressure steam generator at Hokuriku Electric Power Co., Inc., Tsuruga Thermal Power Station No. 2 was designed based on the high-performance, reliable No. 1 500 MW steam generator getting good reputation from user, and began its commercial operation in September 2000.
Applying elevated steam of 593/593°C, MHI's state-of-the-art low-NOx combustion A-PM burner, A-MACT and MRS pulverizer technology, this steam generator has achieved the highest combustion performance with extremely low NOx emission between 70 and 80 ppm (at 6% O2) and unburned carbon under 1% together with outstanding boiler operation, i.e., low excess air combustion less than 15% and minimum 15% load operation in exclusive coal firing.
In order to withstand high steam temperatures up to 593/593°C, new high-temperature resistance materials, such as 18-Cr steel (ASME Code Case 2328), 25-Cr steel (SA213-TP310HCbN) were adopted for the high-temperature part of the superheater and reheater heating tubes.
It was also confirmed that the static or dynamic operation performance of the steam generator, i.e., the steam generator efficiency, the steam temperature characteristic and the load swing characteristic well satisfy the guaranteed or designed values over the whole load range from 100% to the minimum load of 15%. |
