Cracking and Corrosion of Composite Tubes in Black Liquor Recovery Boiler Primary Air Ports

Keiser, James R. ; Singbeil, Douglas L. ; Sarma, Gorti B. ; Kish, Joseph R. ; Yuan, Jerry ; Frederick, Laurie A. ; Choudhury, Kimberly A. ; Gorog, J. Peter ; Jetté, Francois R. ; Hubbard, Camden R. ; Swindeman, Robert W. ; Singh, Prett M. ; Maziasz, Phillip J.

Weyerhaeuser Company

关键词: Building Materials;    Boilers;    Heat Flux;    Spent Liquors;    Corrosion Fatigue;   

DOI  :  10.2172/899758
RP-ID  :  DOE/GO/14035-1
RP-ID  :  FC36-04GO14035
RP-ID  :  899758

美国|英语

来源: UNT Digital Library

【 摘 要 】

Black liquor recovery boilers are an essential part of kraft mills. Their design and operating procedures have changed over time with the goal of providing improved boiler performance. These performance improvements are frequently associated with an increase in heat flux and/or operating temperature with a subsequent increase in the demand on structural materials associated with operation at higher temperatures and/or in more corrosive environments. Improvements in structural materials have therefore been required. In most cases the alternate materials have provided acceptable solutions. However, in some cases the alternate materials have solved the original problem but introduced new issues. This report addresses the performance of materials in the tubes forming primary air port openings and, particularly, the problems associated with use of stainless steel clad carbon steel tubes and the solutions that have been identified.