Abstract: The thermal medium boiler is the core equipment for oil and gas treatment. At present,the thermal medium boilers in operation in offshore oil and gas fields,FPSOs and terminal treatment plants are characterized by high energy consumption and high emissions. The nitrogen oxides discharged exceed the emission standard limit of atmospheric pollutants by≤100 mg/Nm³. In order to overcome the drawbacks of high energy consumption and emissions in boilers,and to address the frequent start-stop issues of the equipment,the concepts of emission reduction,energy conservation,and carbon reduction have been integrated into the low nitrogen transformation plan,breaking through the conventional approach to achieve multiple benefits. After the completion of the low nitrogen burner and exhaust gas recirculation transformation technology for the thermal medium boiler,the hot oil system has been operating stably since its commissioning,with nitrogen oxide emissions less than 30 mg/Nm³. The economic and social benefits are very significant.

Key words: thermal medium boiler, air pollution, standard emission, energy saving and emission reduction, cost reduction and efficiency increase