Power generating system

A power generation system and heater technology, which is applied in the direction of machines/engines, steam engine devices, steam applications, etc., can solve the problems of difficult structure and high cost, and achieve the effect of improving the efficiency of thermal cycle

Inactive Publication Date: 2014-06-04
俞述茜
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Problems solved by technology

On the premise of heating condensate water and feed water to the same temperature, the smaller the temperature difference between the steam extracted from the main steam turbine and the heated water, the higher the thermal cycle efficiency of the power plant, which requires more steam extraction stages, the better. It's just that too many steam extraction stages are not only difficult to realize structurally, but also expensive

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Embodiment Construction

[0023] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0024] "Back pressure expander (steam turbine or screw expander)" refers to an expander that directly introduces the extraction steam of the main steam turbine and takes the pressure of the auxiliary extraction heater as the back pressure, and its inlet is the same as the inlet of the extraction heater Connect the same extraction port in parallel.

[0025] The "auxiliary extraction heater" is distinguished from the extraction ...

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Abstract

The invention relates to a power generating system which comprises a boiler, a main steam turbine, a steam extraction heater and a generator. A steam cylinder of the main steam turbine is provided with a steam extraction opening, and steam is extracted from the steam extraction opening. Supply water of a condensate pump and feed water of a boiler feed water pump are heated through the steam extraction heater. The steam extracted from the steam extraction opening is divided into two ways, one way is connected to the steam extraction heater and used for heating the condensation water or the boiler feed water, and the other way is connected to an auxiliary steam extraction heater through a back-pressure type expansion machine. In the auxiliary steam extraction heater, the heated water is connected with a water channel outlet of a later-stage steam extraction heater closest to the main steam turbine through a water channel inlet. The water channel outlet of the auxiliary steam extraction heater is connected with the water channel inlet of a same-stage steam extraction heater. According to the power generating system, by means of the back-pressure steam turbine, more heat is converted into power, more temperature gradients are obtained through the auxiliary steam extraction heater to lower the temperature difference between the two sides of the steam water of the steam extraction heater, and therefore the whole thermodynamic cycle efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of power generation equipment, and in particular relates to a steam power generation system, in particular to a steam expansion device integrated into a steam turbine extraction steam heating condensate water and feedwater heating system to obtain more steam heating steps , a power generation system that reduces the temperature difference between the two sides of the steam and water to improve the thermal cycle efficiency of the steam turbine. Background technique [0002] At present, a steam power generation system using fuel generally consists of a steam generating device, a main steam turbine, an extraction heating device, and a generator. The main equipment of the power generation system includes boiler, main steam turbine, steam extraction heating device and main generator, etc. Generally, the connection operation mode of the steam power generation system is that the feed water pump supplies water to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/02F01K17/02F01D15/10
Inventor 俞述茜
Owner 俞述茜
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