High heat-flux heat exchange pipe and its production method

Application Number: 00107256
Application Date: 2000.04.30
Publication Number: 1321870
Publication Date: 2001.11.14
Priority Information:
International: F28F13/18
Applicant(s) Name: China Petro-Chemical Corp.
Address:
Inventor(s) Name: Yang Linsheng;Li Shumin;Chu Yanping
Patent Agency Code: 11218
Patent Agent: wei qiangwen
Abstract The present invention provides a high heat flux heat-exchange pipe and its production method. Said method includes the following steps: making the pipe whose surface is coated with brazing material and pore-forming material pass through high-temp. furnace with 700-1300 deg.C to melt the brazing material and branze the metal powder as pore-forming material on the surface of the pipe to form porous layer so as to obtain this invented pipe with high heat flux. the thickness of porous layer of said pipe is 0.2-0.8 mm, and its porosity is 40-65%, and its heating coefficient is 7-8 times that of general smooth pipe. The porous layer surface of said pipe is hard and smooth, uniform in thickness, and its not easy to scal, and said pipe can be produced in large batch.