Furnaces – Utilizing powdered fuel – Having rotary flow means
Patent
1987-05-06
1988-11-15
Favors, Edward G.
Furnaces
Utilizing powdered fuel
Having rotary flow means
239427, 239434, 431174, 431179, F23D 102
Patent
active
047840439
ABSTRACT:
An atomizer including a fuel supply passage for supplying a fuel, an atomizing medium supply passage for supplying an atomizing medium which is to be mixed with the fuel, a mixing chamber in communication with the fuel supply passage and the atomizing medium supply passage, and spray ports for spraying the fluid mixture consisting of the fuel and the atomizing medium from the mixing chamber. The fuel supply passage and the atomizing medium supply passages are communicated with the mixing chamber through a pre-mixing chamber having an annular cross-section defined by a large-diameter cylindrical surface and a small-diameter cylindrical surface. The fuel and the atomizing medium supplied from the fuel supply passage and the atomizing medium supply passage are pre-mixed the pre-mixing chamber. With this arrangement, it is possible to efficiently mix a slurry fuel and an atomizing medium, thus reducing the particle size of the atomized fuel particles and shortening the flame length. Thus, the atomizer of the invention is indispensable for the boilers which are intended for burning coal-water slurry. The invention makes it possible to form flames with reduced NOx generation and a high burning efficiency through combination between atomizer of the construction described above and a burner having a specific construction.
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Proceedings of the Sixth International Symposium on Coal Slurry Combustion and Technology, Orlando, Fla., 25th-17th Jun. 1984, pp. 827-844, US Department of Energy et PETC, Pittsburgh, US; N. Chigier et al: "Atomization of Coal-Water Slurries".
Arashi Norio
Azuhata Shigeru
Inada Tooru
Kobayashi Hironobu
Miyadera Hiroshi
Babcock-Hitachi Kabushiki Kaisha
Favors Edward G.
Hitachi , Ltd.
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