Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine

A technology of small steam turbines and thermal systems, applied in steam engine devices, machines/engines, steam applications, etc., can solve problems such as high degree of superheat and affect thermal cycle efficiency, reduce system cost, improve thermal cycle efficiency, and reduce heat transfer area effect

Inactive Publication Date: 2014-01-01
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST +1
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Problems solved by technology

However, after reheating, the extraction temperature is higher and the degree of superheat is large. The energy of the superheated part is also used to heat water along with the latent heat of vaporization, which affects the efficiency of the thermodynamic cycle.

Method used

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  • Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine
  • Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine
  • Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine

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Embodiment Construction

[0025] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solutions of the present invention.

[0026] Terminology Explanation

[0027] Reheating: The steam that has done part of the work in the steam turbine is drawn out for reheating, and then led back to the steam turbine to continue to work. This method is called reheating. Through reasonable reheating, the exhaust humidity can be reduced and the thermal cycle efficiency can be improved.

[0028] Back-pressure steam turbine: A steam turbine that exhausts steam to a piping system or heat exchanger above atmospheric pressure is called a back-pressure steam turbine.

[0029] Condensin...

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Abstract

The invention provides a thermal system of a backpressure steam extraction small turbine which is coaxial with a single reheating main turbine. A single reheating main turbine set is provided with a high-pressure cylinder, a moderate-pressure cylinder, a low-pressure cylinder and a reheating device. The thermal system of the backpressure steam extraction small turbine comprises a backpressure steam extraction small turbine, a steam inlet pipe system, a steam extraction pipe system and a heat returning device. Steam, which is to be reheated, of the single reheating main turbine is used as a steam source by the thermal system to drive the backpressure steam extraction small turbine. Steam extraction and exhausting of the backpressure steam extraction small turbine are used for heating supplied water and condensate water. The backpressure steam extraction small turbine and the single reheating main turbine are coaxially arranged. The thermal system of the backpressure steam extraction small turbine can reduce the manufacturing cost of the system and meanwhile, improve the thermodynamic cycle efficiency.

Description

technical field [0001] The invention is applicable to a primary reheat steam turbine generating set, and in particular relates to a back pressure extraction small steam turbine thermodynamic system in a primary reheat steam turbine set. Background technique [0002] The reheating system of a thermal power plant using primary reheat technology is to draw out the steam that has done part of the work in the main steam turbine for reheating, and then lead it back to the steam turbine to continue to work, so as to improve the efficiency of the thermal system. [0003] Thermal power plants using primary reheat technology are usually equipped with a heat recovery system, which uses the heat extracted from the main steam turbine to heat the condensed water and feed water through the heater, and recovers all the heat extracted from the steam to the working medium water to reduce the circulation of water. The latent heat of vaporization is discharged to improve the efficiency of the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K17/02
Inventor 申松林叶勇健陈仁杰姚君施刚夜林磊蒋健朱佳琪卢国华阳虹彭泽瑛范世望何海宇
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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