The composition and calorific value of syngas in IGCC power plant are very important for stable operation of the gas turbine and the whole power plant

the adjustment of calorific value is fulfilled by syngas saturator and related systems.The types of syngas saturator in IGCC power plant as well as other types of syngas mixer and calorific value adjusting devices have been briefly expounded

and the water type saturator being simulated and analysed.The features and affecting factors for water type saturator and steam type saturator of syngas have been summarized up

and the two types of syngas saturator being compared.The comparison shows that the outlet temperature and flow rate of condensate from the water type saturator affect the temperature and composition of the outlet syngas;the temperature and flow rate of inlet syngas of steam type saturator have larger influence upon the temperature and composition of the syngas.