The Central heating boiler tube utilized for heavy steam power plant

Central heating boiler tube generally refers to the seamless steel tube used in industrial boilers, locomotive boilers and also coal-fired power plant boilers. According to the vapor stress, the thermal power boiler can be divided right into reduced pressure, medium pressure, high pressure, ultra-high stress, subcritical as well as supercritical stress central heating boiler.

With the growth of power plant boilers from subcritical to supercritical as well as ultra-supercritical, the single ability of the primary unit has actually additionally created to 600 thousand kilowatts, 800 thousand kilowatts and also also 1 million kilowatts. As a result of the power consumption and environmental protection demands of the generator collection, individuals have greater and higher demands for the high-pressure central heating boiler tube. It is proved that suitable heat pipe products can considerably enhance heavy steam specifications and also improve performance of thermal power devices. What is the function of these steel tube heavy steam central heating boilers?

Steam flow. The water with the condenser, deaerator to by heating up the economizer flue waste heat pre-heating, the water to the water wall surface after preheating, vapor drum, down pipe, header right into the furnace, the warmed vapor after steam-water splitting up entering the water wall surface again after the decline tube heating, heavy steam flow in the superheater to the hottest component of the heating furnace to the design of the heavy steam criteria, outcome to the steam generator to do work for the first time.

Returned after reduced temperature level vapor central heating boiler, doing work under the warm of the reheater reheating heavy steam criteria to develop for the second time sent out to the heavy steam generator power (some systems in order to further improve performance, will certainly be the 2nd time of low temperature steam after job, then back to the reheater steam heated to design parameters, the third back to the work of steam generator system). The heavy steam after work is sent to the condenser to condense into water and then went back to the economizer to form a cycle.

Raising vapor criteria of thermal power devices can not only substantially save gas however likewise lower CO2 discharge obviously. Usually, supercritical pressure central heating boilers are defined as those whose main vapor www.wldsteel.com outlet pressure is more than 22.0 MPa, as well as those whose major steam electrical outlet stress is greater than 28MPa or whose major vapor and reheat vapor temperature level are greater than 580 ° C. Data show that the parameters (3.5 Mpa, 435 ℃) to high parameter (9 Mpa, 535 ℃) can conserve fuel 12% to 15%, increasing to high parameter and reheat in the center of a (13.5 Mpa, 535 ℃/ 535 ℃), as well as can conserve gas, 8% to supercritical criterion as well as reheat in the middle of a (24 Mpa, 550 ℃/ 550 ℃) to conserve fuel by 8%, by 24 Mpa, 565 ℃ to 565 ℃ to 30 Mpa, 600 ℃/ 600 ℃, loved one efficiency can be boosted by 4.5%,.

The second intermediate reheat can likewise enhance by 2%, particularly 30MPa, 600 ° C-600 ° C-600 ° C. Therefore, it is practical to enhance the vapor specifications of the existing power plant central heating boiler.

Today, Japan, Europe, the United States and various other nations have researched the application of new heat-resistant materials in thermal power stations. Using P91/T91 steel has greatly boosted the performance of supercritical thermal power units. The effective application of P92/T92 steel has actually allowed the advancement of ultra-supercritical thermal power units. In recent times, the application of new nickel-based alloy products such as Alloy 600 and Alloy617 has actually brought sophisticated supercritical thermal power devices with steam parameters of 700 ° C/720 ° C right into application.