The Central heating boiler tube utilized for steam power plant

Central heating boiler tube typically refers to the smooth steel tube used in commercial boilers, engine boilers and 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 stress, high pressure, ultra-high stress, subcritical and supercritical stress central heating boiler.

With the growth of power plant boilers from subcritical to supercritical as well as ultra-supercritical, the solitary ability of the major device has likewise developed to 600 thousand kilowatts, 800 thousand kilowatts and even 1 million kilowatts. Due to the power intake and environmental protection requirements of the generator collection, individuals have greater and also higher requirements for the high-pressure central heating boiler tube. It is confirmed that ideal heat pipeline products can greatly maximize heavy steam parameters and enhance performance of thermal power systems. What is the purpose of these steel tube vapor central heating boilers?

Vapor flow. The water via the condenser, deaerator to by warming the economizer flue waste warm preheating, the water to the water wall after pre-heating, steam drum, down pipe, header right into the furnace, the heated steam after steam-water separation getting in the water wall again after the decline tube home heating, steam circulation in the superheater to the best part of the heating furnace to the style of the vapor parameters, output to the vapor turbine to do benefit the first time.

Returned after reduced temperature level heavy steam boiler, doing work under the warmth of the reheater reheating heavy steam criteria to develop for the second time sent to the vapor turbine power (some units in order to more boost effectiveness, will be the second time of low temperature heavy steam after job, after that back to the reheater heavy steam heated up to create specifications, the 3rd back to the work of heavy steam generator unit). The vapor after work is sent out to the condenser to condense into water and afterwards went back to the economizer to form a cycle.

Increasing heavy steam parameters of thermal power units can not only considerably conserve fuel but also minimize CO2 discharge obviously. Normally, supercritical stress boilers are specified as those whose primary vapor electrical outlet pressure is more than 22.0 MPa, and those whose primary vapor outlet stress is more than 28MPa or whose major vapor as well as reheat vapor temperature are more than 580 ° C. Data show that the parameters (3.5 Mpa, 435 ℃) to high parameter (9 Mpa, 535 ℃) can save gas 12% to 15%, raising to high specification as well as reheat in the middle of a (13.5 Mpa, 535 ℃/ 535 ℃), and can conserve fuel, 8% to supercritical criterion as well as reheat in the middle of a (24 Mpa, 550 ℃/ 550 ℃) to save fuel by 8%, by 24 Mpa, 565 ℃ to 565 ℃ to 30 Mpa, 600 ℃/ 600 ℃, loved one performance can be increased by 4.5%,.

The second intermediate reheat can additionally increase by 2%, particularly 30MPa, 600 ° C-600 ° C-600 ° C. Therefore, it is possible to boost the vapor specifications of the existing power station boiler.

Currently, Japan, Europe, the United States and also other nations have actually researched the application of new heat-resistant materials in thermal power stations. The use of P91/T91 steel has considerably boosted the efficiency of supercritical thermal power devices. The effective application of P92/T92 steel has allowed the advancement of ultra-supercritical thermal power devices. Over the last few years, the application of brand-new nickel-based alloy products such as Alloy 600 as well as Alloy617 has brought advanced supercritical thermal power devices with heavy steam parameters of 700 ° C/720 ° C right into application.

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