Boiler waterwall panel

a technology of boiler water wall and water wall plate, which is applied in the direction of steam boiler components, steam boiler components, lighting and heating apparatus, etc., can solve the problems of troublesome work for welding defects, corrosion of subatrate materials, and breakdown of corrosion resistant alloy coatings, etc., to reduce welding operation burden, improve welding efficiency, and perform more easily
US20100300379A1Inactive Publication Date: 2010-12-02DAI ICHI HIGH FREQUENCY +1
7 Cites 8 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
DAI ICHI HIGH FREQUENCY
Publication Date
2010-12-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

It is an object to reduce the burden of a welding operation in producing a boiler waterwall panel and to reduce the burden of maintaining a furnace housing using the boiler waterwall panels thereby to improve the operating rate of the boiler. In a boiler waterwall panel 80, a panel body 70 with water passages is constituted by a plurality of metal seamless finned single tubes 60 as constituent units integrally produced by a hot extrusion method, etc., and joined by welding tip ends of fin portions 62. On at least one surface side of the panel body 70, fusion-bonded coating 81 for frame-like edge portions and fusion-bonded coating 82 for inner region, of a corrosion resistant alloy are formed. The finned single tube 60 has a single tubular portion 61 for a cooling water passage and a pair of fin portions 62 extending in the tube axial direction at peripheral opposite sides of the tube, and the external surface of the transition portion 63 is formed into a concave surface having a curvature radius of 3 to 6 mm.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The present invention relates to a boiler waterwall panel constituting a furnace housing with cooling water passages.

[0002] This boiler waterwall panel is a plate-pipe composite panel to be used as an element member at the time of forming a wall panel constituting a housing of a furnace (combustion chamber-cum-heat exchanger) as the core of a water heating boiler. A plurality of boiler waterwall panels are joined by welding vertically and horizontally to constitute a furnace housing.

[0003] To improve the durability of the furnace housing inner surface, one surface of the boiler waterwall panel is covered with an alloy, e.g. a self-fluxing alloy of nickel series.BACKGROUND ART

[0004] A method for heating a water-cooling panel segment comprising a metal tubular portion and a metal plate portion arranged alternately without causing heat strain is known (see e.g., Japanese Unexamined Laid-open Patent Publication No. 2000-329304). The structure and production method of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More