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A high heat and power ratio combined heat and power system and its working method

A heating system and specific heat technology, applied in preheating, energy industry, feed water heaters, etc., can solve problems such as the limitation of heat-to-electricity ratio of power generation, and achieve the effect of improving efficiency, increasing heat-to-electricity ratio, and lower investment

Active Publication Date: 2017-03-15
XI AN JIAOTONG UNIV
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Problems solved by technology

However, in the heating season, in order to ensure the heat load requirements of the heating generating unit, it is necessary to ensure a certain amount of power generation of the combined heat and power unit, which is mainly limited by the heat-to-electricity ratio of the combined heat and power unit.

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  • A high heat and power ratio combined heat and power system and its working method
  • A high heat and power ratio combined heat and power system and its working method

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The working principle of the present invention is as follows:

[0020] Combined heat and power generation unit refers to the production method that uses high-temperature and high-pressure steam to generate electricity, and then uses all or part of the steam that has done work to provide heat to users, which saves fuel compared to producing electricity and heat energy separately. Cogeneration of heat and power is an effective form of thermal energy utilization in grades. Adjusting the extraction steam cogeneration unit can adjust the extraction steam volume with the change of the external heat load, and the electric power can change with the electric load without being limited by the heat load. Therefore, the current large cogeneration units are steam extraction cogeneration units. However, the combined heat and power unit has...

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Abstract

A large heat and power ratio cogeneration system, comprising sequentially connected boilers, high and medium pressure cylinders of steam turbines, heat supply and steam extraction pressure regulators, low pressure cylinders of steam turbines, condensers and condensate pumps, the steam outlet of the low pressure cylinders of steam turbines is connected to Multi-stage steam compressor condensate heating system, the outlet of the multi-stage steam compressor condensate heating system is connected to the regenerative heating system, and the outlet of the regenerative heating system is connected to the boiler inlet; the power generation system in the high heat-to-electricity cogeneration system Completely or partially cancel steam extraction from the steam turbine recovery system to increase the condensed steam capacity of the steam turbine, and at the same time increase the multi-stage steam compressor condensate heating system, and use multi-stage steam compressors for condensate heating to further eliminate the redundant heat and power cogeneration units Electricity, thereby greatly increasing the heat-to-power ratio of the combined heat and power system.

Description

technical field [0001] The invention belongs to the technical field of heat and power cogeneration machines, and in particular relates to a high heat and power ratio cogeneration system and a working method thereof. Background technique [0002] In recent years, my country's power generation installed capacity has been growing continuously, and the power grid load is seriously insufficient. With the promotion of combined heat and power technology in my country, most of the centralized heating in northern China is undertaken by heating generators. However, in the heating season, in order to ensure the heat load requirements of the heating generating unit, it is necessary to ensure a certain amount of power generation of the combined heat and power unit, which is mainly limited by the heat-to-power ratio of the combined heat and power unit. The heat-to-power ratio of combined heat and power units has become a key parameter restricting the load regulation of the northern power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K11/02F01K17/02F22D1/34
CPCY02E20/14Y02P80/15
Inventor 刘明严俊杰种道彤刘继平邢秦安王进仕陈伟雄
Owner XI AN JIAOTONG UNIV
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