The Central heating boiler tube utilized for steam power plant
Boiler tube generally refers to the seamless steel tube utilized in industrial central heating boilers, engine central heating boilers and also coal-fired power plant central heating boilers. According to the heavy steam pressure, the thermal power central heating boiler can be divided into reduced stress, medium pressure, high pressure, ultra-high stress, subcritical and also supercritical pressure boiler.
With the development of nuclear power plant central heating boilers from subcritical to supercritical as well as ultra-supercritical, the solitary ability of the major unit has also established to 600 thousand kilowatts, 800 thousand kilowatts and also 1 million kilowatts. As a result of the power intake as well as environmental management demands of the generator collection, people have higher and also greater demands for the high-pressure central heating boiler tube. It is verified that ideal high temperature pipe products can significantly optimize steam specifications and also improve efficiency of thermal power devices. What is the objective of these steel tube vapor central heating boilers?
Steam blood circulation. The water with the condenser, deaerator to by heating the economizer flue waste heat preheating, the water to the water wall after pre-heating, heavy steam drum, down pipeline, header into the heater, the heated steam after steam-water separation entering the water wall surface again after the drop tube home heating, vapor flow in the superheater to the most popular part of the heating heater to the style of the vapor specifications, output to the vapor wind turbine to do work for the first time.
Returned after reduced temperature vapor boiler, doing work under the warm of the reheater reheating heavy steam specifications to create for the 2nd time sent out to the heavy steam generator power (some systems in order to more boost effectiveness, will WLDSTEEL.COM certainly be the 2nd time of reduced temperature level steam after work, after that back to the reheater steam warmed to make specifications, the third back to the work of vapor generator system). The vapor after work is sent out to the condenser to condense into water and after that went back to the economizer to create a cycle.
Boosting heavy steam specifications of thermal power systems can not only considerably conserve gas yet likewise lower CO2 emission clearly. Usually, supercritical stress central heating boilers are specified as those whose main steam outlet stress is greater than 22.0 MPa, as well as those whose primary steam electrical outlet stress is more than 28MPa or whose main steam and also reheat steam temperature level are greater than 580 ° C. Data show that the specifications (3.5 Mpa, 435 ℃) to high specification (9 Mpa, 535 ℃) can conserve fuel 12% to 15%, enhancing to high parameter and also reheat in the center of a (13.5 Mpa, 535 ℃/ 535 ℃), as well as can save fuel, 8% to supercritical parameter and reheat in the center of a (24 Mpa, 550 ℃/ 550 ℃) to save gas by 8%, by 24 Mpa, 565 ℃ to 565 ℃ to 30 Mpa, 600 ℃/ 600 ℃, loved one efficiency can be enhanced by 4.5%,.
The secondary intermediate reheat can additionally raise by 2%, namely 30MPa, 600 ° C-600 ° C-600 ° C. Therefore, it is possible to improve the vapor specifications of the existing power plant central heating boiler.
Currently, Japan, Europe, the United States and also various other countries have actually examined the application of new heat-resistant materials in thermal power plant. Making use of P91/T91 steel has substantially improved the efficiency of supercritical thermal power devices. The effective application of P92/T92 steel has actually allowed the development of ultra-supercritical thermal power devices. In recent years, the application of brand-new nickel-based alloy products such as Alloy 600 and Alloy617 has actually brought sophisticated supercritical thermal power systems with heavy steam parameters of 700 ° C/720 ° C into application.