The requirements of high-pressure boiler pipe for power plant.

High-pressure boiler pipe, is an important raw material for the manufacture of power plant. There are many technical requirements for high pressure boiler seamless steel pipe, different specifications and difficult production. High-pressure boiler pipe is mainly used for the manufacture of power plant boiler water wall, economizer, superheater, reheater and join the various components of steam, water connection pipes.Power plant Boiler works principals:Water Cycle: New water from the condenser sent to the deaerator heat from flue economizer heating preheating, water preheated is sent to the heating system made up with water wall, drum, down pipe and header, heating steam formed by drum separator, the water through the drop pipe and re-entering the water wall tube heating, water vapor is introduced into the superheater. Heating to the designed steam parameter in the hottest part of the furnace, output to the first acting of the steam turbine. The low temperature steam acted reversion back to the boiler, through the reheater heating, heated again to determined designed parameters of the steam and supplied to the second turbine to do work (some units to further increase efficiency, the second low temperature steam after doing work, then returned to reheat steam heated to determined designed parameters, and the third returned to the steam turbine acting). Steam to the condenser condenses into water after doing work, back to the economizer again forming cycle.Combustion of coal: coal is sent from the storage device to the mill ground into a pulverized coal, air after heated through the air preheater and together with the pulverized coal, with the burner injected into the combustion chamber, the ash gathered from the ash combustion chamber collected by ash discharge device.From the technical development of power plant boilers point of view, with the development of power station boilers from subcritical to supercritical and ultra-supercritical unit capacity of the main units from 125,000 kilowatts, 200,000 kilowatts, 300,000 kilowatts, developed into 600,000 kilowatts, 800,000 kilowatts and 100 kilowatts. Because of the energy generators, environmental requirements are getting higher and higher, so the requirements for high-pressure boiler pipe is getting higher and higher, the course of thermal power development shows that the development of high-temperature tube material determines the increase of thermal power steam parameters and efficiency.