The Babcock & Wilcox Company (B&W) is working with Wuhan Kaidi Electric Power Company, Ltd. (Kaidi) to help The People’s Republic of China, the world’s largest producer and consumer of coal, meet air quality improvement goals through the design, installation and operation of B&W’s Wet Flue Gas Desulfurization (WFGD) technology. More commonly known as “scrubbers,” this proven technology reduces sulfur dioxide (SO2) emissions from coal-fired power plants through a reaction process that turns the SO2 into a reusable or disposable gypsum byproduct.
Since the licensing agreement with B&W was signed in August 2002, Kaidi has sold and installed 16,070 megawatts (MW) of scrubber capacity, including units that are currently in the design and construction phase. Of this total, in 2004, Kaidi received orders to install B&W’s environmental equipment on eight contracts in China totaling 7,470 MW. In 2005 to date, Kaidi has received orders for an additional four contracts totaling 3,600 MW.
Energy demand continues to grow in China, where high-sulfur coal is fired in three-quarters of the country's power plants. The country estimates that damage to the environment and human health caused by acid rain and SO2 pollution translates into economic losses of 110 billion yuan (US$13.3 billion) annually. More than 21 million tons of SO2 were emitted in 2003, and 22.5 million tons in 2004. Through its Five-Year Plans, The State Environmental Protection Administration of China has called for reductions in SO2 throughout the country.
“Kaidi engineers have been extensively trained in the application and technical support of B&W’s WFGD technology, and we continue to support Kaidi’s WFGD projects through in-country engineering support and support from our engineering offices in Barberton, Ohio,” said John Black, director of Business Development at B&W. “We are pleased to have a role in developing and applying solutions that use China’s supply of coal and improve the quality of the environment in that part of the world.”
B&W’s advanced WFGD systems operate by mixing a limestone slurry (reagent) with flue gas generated from the combustion of fossil fuel in large steam generators that are used for electric generation and other industrial purposes. The mixing of the reagent and flue gas occurs within B&W’s absorber module and is supported by an elaborate array of auxiliary equipment which effectively removes SO2 from the flue gas and creates a gypsum (calcium sulfate) byproduct that can be used to make construction materials and a number of other industrial products. B&W’s WFGD system features include B&W’s uniquely designed absorber module which assures optimal contact and mixing of the flue gas and reagent by means of multiple interspatial spray levels, and B&W’s patented flue gas distribution tray, which in combination can achieve greater than 98 percent SO2 removal from plant emissions.
Based in Wuhan, Hubei, China, Kaidi participates in the development and application of new environmental protection products and technologies for the electric power industry. Kaidi is mainly engaged in engineering, procurement and construction (EPC) projects, providing complete plant design, installation, operator training, and start-up/commissioning services for WFGD systems for fossil-fueled electric power generating stations and other environmental technologies. Its emphasis is on state-of-the-art clean coal technologies, thermal power generation and waste-to-energy projects.
The Babcock & Wilcox Company is a subsidiary of McDermott International, Inc., a leading worldwide energy services company. McDermott subsidiaries manufacture steam-generating equipment, environmental equipment, and products for the U.S. government. They also provide engineering and construction services for the offshore oil and natural gas industries.