MHI takes ordern for China FGDs
Mitsubishi Heavy Industries Ltd. (MHI) jointly with Mitsubishi Corp., has received an order for two large-scale flue-gas desulfurization (FGD) systems for coal-fired power plants from Huaneng International Power Development Corp. of China.
The systems will be installed at Luohuang Power Station, in Jiangjin County, approximately 35 km east of Chongqing City, Sichuan Province. The systems will be installed in the No. 3 and No. 4 plants, each 360 MW, which will be built as Phase II of the plant construction.
This order is a consecutive one from the power station, as MHI delivered two FGD systems in 1992 for the first phase of construction.
The station will burn high-sulfur coal, resulting in unprocessed flue gas with an extremely high quantity of sulfur dioxide, up to 3,700 ppm. The FGD systems will be installed to prevent acid rain, a social concern in the surrounding area.
The system will use Mitsubishi Wet Limestone/Gypsum Flue-Gas Desulfurization, with an efficiency of 95 percent. Gypsum, a by-product of the desulfurization processing, will be used as raw material for cement and gypsum board.
The systems will adopt a new tower-absorber, called a double-contact flow scrubber, in which a limestone slurry is simultaneously spouted from nozzles on spray pipes to react with the flue gas, absorbing SO2.
This new method will be used for the first time in an overseas commercial operation, although it is already in commercial operation in Japan with verified high desulfurization efficiency, according to MHI.
Most of the equipment for the systems will be procured and manufactured in China in cooperation with Huaneng International Power Development Corp., greatly reducing construction costs from those on the first phase. The FGD system for No. 3 will begin operation in October 1999, and the No. 4 unit will begin operation in April 2000.