Research and Application of Chemical Ammonia Dosing System and Its Safety Technology for Large-Scale Combined Cycle Power Plant

Abstract

[Introduction] Through the technical and economic comparison of two ways of chemical dosing liquid ammonia and ammonia water for a large-scale combined cycle power plant in Guangdong Province, it is proposed that the water quality control index of condensate and feed water in the way of adding liquid ammonia is prior to the way of adding ammonia water. In addition, adding liquid ammonia can improve the corrosion resistance of the thermal system equipment and pipelines, and is beneficial to the safe and stable operation of the whole unit. Moreover, the consumption and operation cost of liquid ammonia are lower and the technical and economic benefits are more effective. [Method] In order to ensure the safe operation of liquid ammonia storage tank and prevent safe accidents, combined with the current national and local regulations and standards, this paper provided the safety technology design and measures for liquid ammonia system. [Result] This paper summarizes the key technology and innovative points of safety design for liquid ammonia system. [Conclusion] Therefore, it can play a reference role for the design of similar projects in the future.

Keywords

• large-scale combined cycle power plant
• chemical dosing
• liquid ammonia storage tank
• safety technology