Instrumentation Engineering Design and Application of SCR Flue Gas Denitration System in a Power Plant in Severe Cold Region

Author of the article:Li Dongsheng, Liu Yonggang, Sun Wei

Author's Workplace：Foster Wheeler (Hebei) Engineering Design Co., Ltd.

Key Words：Severe cold region；Denitration device；Instrumentation engineering design；Heat preservation and heat tracing

Abstract：In view of the SCR flue gas denitration project in a power plant in northeast China, considering the influence of low temperature in winter on the reliability and safety of the automatic control system and instruments in cold region, and combined with the experience accumulated in the instrumentation engineering design in the severe cold region, the influence of the low temperature environment on the design and the importance of the instrumentation engineering design work are described. This paper describes the selection of instruments and materials, the problems and solutions of cable selection and laying in the process of design, the method of heat preservation and heat tracing and the problems require attention in the process of construction. After the denitration device is put into use, the automatic control system and instruments have been running safe and smooth, reducing the workload of maintenance, ensuring the continuous production and stable operation to improve the economic efficiency.