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Energy and Environment, 1995

ISBN:
1-56700-052-5 (Print)

SLAGGING ANALYSIS AND PREVENTION OF UTILITY BOILERS WITH TILTING BURNERS

ZhenJin Zhu
Institute for Thermal Power Engineering, Zhejiang University, China

ZuoHe Chi
Institute for Thermal Power Engineering, Zhejiang University, China

WeiGuo Pan
Institute for Thermal Power Engineering, Zhejiang University, China

Xiao Jiang
Institute for Thermal Power Engineering, Zhejiang University, China

LingHong Chen
Institute for Thermal Power Engineering, Zhejiang University, China

Kefa Cen
State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027

Abstract

Tilting burners are widely used in p.f.-fired utility boilers. When burners are tilted, overall flow pattern in furnace are influenced. Fouling and slagging often occur in furnace waterwalls, convection superheaters and reheaters, and ash hoppers, which forces utility boilers shutdown. In order to ensure p. f- fired boilers operate smoothly and economically, to prevent slagging and fouling, series of tests have been conducted on a 600MW utility boiler and its 1/15 scale model. Results show, although tilting burners can realize steam temperature control, burners tilted downwards or upwards long-term in a large angle should be prohibited in operation.