720-DEG C efficient ultra-supercritical secondary reheating power plant boiler

A secondary reheating, ultra-supercritical technology, applied in steam boilers, steam superheating, superheating temperature control, etc., can solve the problem of unclear method of secondary reheating steam temperature adjustment, and alleviate the oxide scale formation process. , Clear temperature regulation logic, improve the effect of operating safety

Active Publication Date: 2015-06-03
章礼道
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0013] The 700°C/723°C/723°C secondary reheat boiler main steam temperature adjustment method in the research and development of the existing technology will continue to use coal

Method used

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  • 720-DEG C efficient ultra-supercritical secondary reheating power plant boiler
  • 720-DEG C efficient ultra-supercritical secondary reheating power plant boiler

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Embodiment Construction

[0065] Combine now figure 1 and figure 2 Taking a 1200MW class secondary reheat type II power plant boiler with boiler side main steam temperature / primary reheat steam temperature / secondary reheat steam temperature 590°C / 723°C / 603°C as an example to illustrate the optimal way to realize the invention.

[0066] A 720°C high-efficiency ultra-supercritical double-reheat power plant boiler of the present invention includes providing a 720°C high-efficiency ultra-supercritical double-reheat power plant boiler and a parameter-optimized 720°C high-efficiency ultra-supercritical double-reheat steam turbine unit, A high-efficiency, safe, low-emission, and low-cost 720°C high-efficiency ultra-supercritical double-reheat power plant boiler is provided.

[0067] A 720°C high-efficiency ultra-supercritical secondary reheat power plant boiler of the present invention includes a furnace and a burner (1), a wall-type primary ultra-high temperature reheater (24), a panel type superheater (2)...

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Abstract

The invention provides a 720-DEG C efficient ultra-supercritical secondary reheating power plant boiler and relates to a high-efficiency, safe, low-emission and low-manufacturing-cost 720-DEG C efficient ultra-supercritical secondary reheating power plant boiler which is used in a coal fired power station and matched with a parameter-optimized 720-DEG C efficient ultra-supercritical secondary reheating turboset. The parameters of a main steam inlet at a boiler side are optimized as 590 DEG C and 42MPa; primary reheating steam parameters are optimized as 723 DEG C and 10.5MPa; secondary reheating steam parameters are optimized as 603 DEG C and 2.1MPa; a tail smoke channel is divided into a front smoke channel, a middle smoke channel and a rear smoke channel by separation walls; hot primary air regulation baffles of an ejector are positioned in the boiler and are opened when in low load; by virtue of controlling the opening and use quantity of the hot primary air regulation baffles of the ejector, primary reheating steam temperature is maintained at a rated value within a BMCR (Boiler Maximum Continuous Rating) interval of 40%-100%; by virtue of changing the use sequence and use quantity of tempering air-smoke ejectors along the furnace width direction, the thermal deviation of a high-temperature surface along the furnace width direction can be compensated and reduced.

Description

(1) Technical field: [0001] The invention relates to a 720°C high-efficiency ultra-supercritical secondary reheat power plant boiler, which relates to a high-efficiency, safe, low-emission, Low-cost 720°C high-efficiency ultra-supercritical double-reheat power plant boiler. (two) background technology: [0002] So far, there are four 700°C ultra-supercritical coal-fired power generation technology development plans being implemented in the world: [0003] The 17-year plan of AD700 in Europe (1998~2014); the 9-year plan of A-USC in Japan (2008~2016); the 15-year plan of A-USC in the United States (2001~2015); Supercritical power generation technology development roadmap (2010~2015), roadmap target parameters: pressure ≥ 35MPa, temperature ≥ 700 ℃, unit capacity ≥ 600MW, construction started in 2015. Without exception, these plans have encountered various difficulties, and it is difficult to see demonstration units put into commercial operation before 2020. [0004] For the...

Claims

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Application Information

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IPC IPC(8): F22B31/08F22G5/04
Inventor 章礼道
Owner 章礼道
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