Energy conservation and emission reduction is attracting more and more concern in recent years

along with that

industry steam supply with medium/high pressure is increasing. In order to achieve large mass flow and full running condition adaptability

a novel combined cycle high pressure industry steam supply technology is proposed

on the basis of analyzing the characteristics of current steam supply technologies. Moreover

the overall thermodynamic characteristics of a supercritical 350 MW unit is simulated

and the operating parameters and key equipment type selection of the entire system after transformation using the above technology is analyzed in detail. The results show that

for the proposed technology

no permanent modifications are needed to the boiler and turbine

which means that there is almost no influence in the unit's performance when industry steam is off-line. After the retrofitting

the steam supply amount greatly increases

the start-stop of the steam supply system is flexible

and the normal operation of the unit is affected little. The parameter adjustment of the external steam supply is flexible and convenient

and the steam supply flexibility is increased. The load adaptability is very good

even under deep peak shaving condition the unit could still achieve steady industry steam supply.