The influence of reducing steam pressure from CFB boiler upon the steam turbine and related thermodynamic system has been analysed.The results of test show that the standard coal consumption of produced steam has decreased 2.46 kg/t after reducing the pressure of steam produced from CFB boiler.If boiler operation in one year is accounting for 280 d

and the the steam production is 280 t/h

the saved standard coal in one year will be about 3802 t.Conversing into petrolium coke

it would be about 3327 t

if the cost of petrolium coke is 1000 yuan/t

the saved cost in one whole year can reach 3.33 milion yuan.