Babcock-hitachi Kabushiki Kaisha

Junichiro Matsuda

Shigeki Morita

Toshihiko Okamoto

Fumio Koda

Tetsuo Mimura

Hajime Kimura

Atsushi Furukawa

Takayo Kawase

A boiler apparatus for leading fluid from a plurality of upper walls () to () to a ceiling wall () through a ceiling wall inlet header (), characterized in that a ceiling wall inlet mixing header () is installed between the plurality of upper walls () to () and the ceiling wall inlet header ().

Boiler apparatus

A furnace wall comprises: a furnace wall bottom part composed of furnace wall tubes having upward-spiraled fluid passages; a nose part which has nose wall tubes disposed in a middle part of a furnace rear wall adjoining the furnace wall bottom part; and a screen part having screen tubes, wherein the terminal parts of the furnace wall tubes are located lower than the nose part. Consequently, the drain generated in the nose wall tubes while the operation of the boiler is suspended can naturally fall inside the furnace wall tubes located lower than the nose part, and in a case where the header is connected with the terminal parts of the furnace wall tubes, the drain generated in the nose wall tubes can naturally fall inside the header. In addition, the furnace wall tubes which extend upright from the terminal parts of the furnace wall tubes can be provided to connect parts of the furnace wall tubes directly with the header, to connect the header with the nose wall tubes via vertical tubes and; and to connect other parts of the furnace wall tubes directly with the screen tubes, thereby integrating the vertical furnace wall tubes, the vertical tubes, and the screen tubes by being welded via membrane bars. This results in the furnace wall structure not requiring reinforcing supports for supporting the weight of the furnace wall bottom part.

Furnace wall structure

Boiler

Growing community of inventors

Hiroshima, Japan

Junichiro Matsuda