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Ultra supercritical boiler with parameter of more than 700 DEG C having secondary re-heating function

An ultra-supercritical boiler and double reheating technology, which is applied to steam boilers, preheating, feed water heaters, etc., can solve the problems of reducing unit efficiency and increasing the superheat of extraction steam, so as to improve unit efficiency, reduce use, The effect of improving efficiency

Inactive Publication Date: 2012-02-29
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

[0004] In addition, with the increase of the main steam and reheat steam temperature, the extraction steam temperature of the condensate heater also increases, resulting in an increase in the extraction steam superheat, which is unfavorable from a thermodynamic point of view and will reduce the efficiency of the entire unit

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  • Ultra supercritical boiler with parameter of more than 700 DEG C having secondary re-heating function
  • Ultra supercritical boiler with parameter of more than 700 DEG C having secondary re-heating function

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] The object of the present invention is to increase the steam temperature to above 700° C. by adopting the double reheating technology.

[0016] see figure 1 , the present invention includes a horizontally placed boiler furnace 11 with a cold ash hopper 10 installed at the lower end and a panel superheater 1 arranged in the boiler furnace 11, a burner 12 is arranged on the front wall of the boiler furnace 11, and a boiler horizontal smoke In the duct, there are high-temperature superheater 2, high-temperature primary reheater 3, high-temperature secondary reheater 4, low-temperature superheater 5, low-temperature secondary reheater 6 and high-temperature primary reheater 7 arranged in sequence according to the flue gas flow direction. Two-stage economizers 8 are arranged in the vertical flue at the rear. Boiler steam passes through the panel superheat...

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Abstract

The invention discloses an ultra supercritical boiler with a parameter of more than 700 DEG C having a secondary re-heating function. A chamber of the boiler is horizontally placed, and a combustor is arranged on a front wall. A high temperature super-heater, a high temperature primary re-heater, a high temperature secondary re-heater, a low temperature super-heater, a low temperature secondary re-heater and a low temperature primary re-heater are sequentially arranged in a horizontal flue along the flow direction of the smoke; a coal economizer is arranged in two stages of a tail vertical flue; and a platen super-heater is arranged in the chamber of the boiler. Through the arrangement mode of the boiler disclosed by the invention, secondary re-heating of the unit can be realized; moreover, the temperature of the steam can be increased to more than 700 DEG C. The length of a high temperature steam pipeline is shortened to the maximum to reduce the construction cost while the efficiency of the unit is obviously improved. Through the invention, the efficiency of thermal power generating units in China is possibly improved to more than 50%.

Description

technical field [0001] The invention belongs to a coal-fired boiler system of a thermal power plant, in particular to an ultra-supercritical boiler with a parameter above 700°C with secondary reheating. technical background [0002] Industrially developed countries such as Europe, the United States, and Japan have successively carried out the research and development of planned projects to increase the efficiency of coal-fired units to more than 50%. Boiler Power Generation (i.e. AD700) Plan" and the "Ultra Supercritical Steam Plan" in the United States. Its main job is to increase the steam parameters to above 700°C, thereby greatly improving the thermal efficiency of the unit. [0003] my country has built and put into operation a considerable number of large-capacity supercritical and ultra-supercritical units using imported technologies in recent years. In order to further improve unit efficiency, it will be one of the future development directions of coal-fired power ...

Claims

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Application Information

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IPC IPC(8): F22B31/08F22D1/02F22D1/00
Inventor 姚明宇陆军贾兆鹏张广才
Owner XIAN THERMAL POWER RES INST CO LTD
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