Page 23: of Maritime Reporter Magazine (May 15, 1969)

... provides greater boiler capacity with minimum deck space and maximum reliability. The current trend in new construction toward mammoth ships presents a unique problem. The requirement is to retain conservative design practices and utilize minimum machinery flat-area while greatly increasing boiler ca-pacity?and maintaining high reliability. Vertical design minimizes stresses. The usual increase in furnace volume with the accompanying increase in boiler height tends to cause hazardous vibrations, especially in bottom-supported units. C-E engineers solved this problem by increasing furnace volume downward, while maintaining the efficient V2M-8 boiler configuration and size. This unique design with mid-span support greatly reduces vibration and minimizes thermal expansion stresses. Short tube generating bank. The V2M-8 short tube con-vection generating bank is incorporated as an integral part of the V2M-9 boiler. This feature adds to the reliability and flexibility of the V2M-9. It permits rapid response to sudden maneuvering demands with mini-mum boiler upset. And there is no danger of a steaming economizer. This steam generating tube bank design virtually eliminates vibration-induced tube failures. Coordinated firing systems. Reliable, high capacity firing performance in V2M-9 boilers is assured by coordination of the boiler and burner designs into an efficient firing system. Tangential firing, pioneered by C-E and now extensively used on land-based boilers, is another C-E innovation in marine applications. Burners are installed in all four corners of the furnace to provide a vortex pattern of flame utilizing the total furnace configuration. Low excess air operation is achieved with this arrange-ment. Where space conditions require, the furnace can be arranged for conventional horizontal firing. With either tangential or horizontal firing the V2M-9 is de-signed to operate efficiently with a wide range of fuel oils. Vertical superheater. The C-E superheater arrangement greatly reduces slag accumulation and provides clear paths for efficient cleaning by retractable soot blowers. The C-E superheater is supported without the need for tube sheets or bulky castings. The wide space between loops allows free access to the fire sides for ease of in-spection and maintenance. Welded-wall design. Developed by C-E for stationary boiler service in 1950, welded walls have been proven over years of actual operation. These gas-tight, fusion-welded wall panels eliminate high-maintenance conven-tional boiler casings, furnace refractory and soot leaks. They also afford a significant weight reduction. Modern design. The V2M-9 does more than just answer the growing need for greater power in today's huge ships. It maintains C-E's high standards to assure maximum reliability in marine boilers. For more information on C-E's V2M-9 High Ca-pacity Marine Boiler and its application in today's modern ships, write the Marine Department, Combus-tion Engineering, Windsor, Connecticut 06095. COMBUSTION ENGINEERING PROGRESS FOR INDUSTRY WORLDWIDE Moy 15, 1969