Title:
HEAT EXCHANGE TUBE AND HEAT RECOVERY METHOD USING IT
Document Type and Number:
WIPO Patent Application WO/2001/013057
Kind Code:
A1
Abstract:
A heat exchange tube consisting of a sintered body having a porosity of 2-60%, and a heat exchange tube having a surface layer consisting of a composite material of ceramics and metal; specifically, when a heat-resistant alloy tube is used as a base and a surface layer is formed of a composite material of ceramics and metal, such structures are preferable; that the outer surface of the heat-resistant alloy tube is non-bondingly covered with a composite material of ceramics and metal, with the heat-resistant alloy tube contacting the composite material at at least part of their boundary; or that the outer surface of the heat-resistant alloy tube is sequentially covered non-bondingly with a thermal expansion buffer material and a composite material of ceramics and metal, with the alloy tube contacting the thermal expansion buffer material and/or the thermal expansion buffer material contacting the composite material at at least part of their boundaries. The heat exchange tube ensures a stable heat recovery over an extended time even in a high-temperature, corrosive environment such as combustion exhaust gas of industrial wastes.
Inventors:
NOTO TAKASHI
NISHIO HIROAKI
NISHIO HIROAKI
Application Number:
PCT/JP2000/005205
Publication Date:
February 22, 2001
Filing Date:
August 03, 2000
Export Citation:
Assignee:
NIPPON KOKAN KK (JP)
International Classes:
F28F19/02; F28F21/04; (IPC1-7): F28F19/02; F28F1/12; F28F21/00; F28F21/04; F28F21/08
Foreign References:
| JPS6183895A | 1986-04-28 | |||
| JPH06307791A | 1994-11-01 | |||
| JPH05180585A | 1993-07-23 | |||
| JPH01159596A | 1989-06-22 | |||
| JPH04371800A | 1992-12-24 | |||
| JPS61227036A | 1986-10-09 | |||
| JPS63140292A | 1988-06-11 |
Attorney, Agent or Firm:
Takano, Shigeru (Intellectual Property Dept. 1-1, Minamiwatarida-cho Kawasaki-ku Kawasaki-shi Kanagawa, JP)
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