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Power generation device and method for recovering heat of cold source of power plant

A power generation device and cold source technology, which can be applied to steam engine devices, machine operation modes, machines using refrigerant evaporation, etc., and can solve problems such as difficulty in recycling and utilization.

Pending Publication Date: 2019-06-07
国能宿州热电有限公司
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  • Application Information

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Problems solved by technology

[0003] The temperature of the cold source in thermal power plants is generally in the range of 295K-320K, and it is difficult to recycle

Method used

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  • Power generation device and method for recovering heat of cold source of power plant
  • Power generation device and method for recovering heat of cold source of power plant
  • Power generation device and method for recovering heat of cold source of power plant

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] Such as figure 1 As shown, a power generation device for recovering heat from the cold source of a power plant, including a Rankine cycle power generation device, CO 2 Transcritical-jet power generation device and jet heat pump device;

[0038] The CO 2 The transcritical-jet power generation device includes a primary evaporator 9, a secondary evaporator 10, a low-pressure working medium pump 15, a high-pressure working medium pump 16, an organic working medium gas turbine 11, a first injector 8, and a second injector 13. Organic working medium condenser 12, organic working medium generator 14, second flow regulating valve 24, fourth flow regulating valve 26, sixth flow regulating valve 28, seventh flow regulating valve 29, eighth flow regulating valve 30 , the ninth flow regulating valve 31, the first isolation valve 34, the second i...

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Abstract

The invention discloses a power generation device and method for recovering the heat of a cold source of a power plant. The power generation device comprises a Rankine cycle power generation device, aCO2 trans-critical-jet power generation device and a jet heat pump unit, the Rankine cycle power generation device is connected with a first injector of the CO2 trans-critical-jet power generation device through a large steam turbine and a small steam turbine, the Rankine cycle power generation device is connected with the jet heat pump unit through a large steam turbine and a small steam turbine, and the jet heat pump unit is connected with the CO2 trans-critical-jet power generation device. A 11th flow adjusting valve and sixth, seventh and eighth isolation valves are arranged in the jet heat pump unit, the low-temperature and low-pressure CO2 flowing out of a throttle valve can be made to directly flow into an organic work medium condenser to carry out the heat exchange with CO2 gas exhaust, the temperature of CO2 entering into a secondary evaporator can be reduced, the heat source temperature of the outlet of the secondary evaporator is reduced accordingly, the temperature of thegas exhaust entering a steam condenser is reduced accordingly, and the great significance is achieved for the saving of the power consumption of a circulating pump in a traditional Rankine cycle, thereducing of the area of the steam condenser and the reducing of the circulating cooling water amount.

Description

technical field [0001] The invention relates to a waste heat recovery and utilization technology, in particular to a power generation device and method for recovering heat from a cold source of a power plant. Background technique [0002] With the rapid development of economy and industry, traditional thermal power plants are gradually changing to large-capacity, high-parameter, supercritical forms, but the loss of cold source is the most important loss in the power plant. Since its temperature is only 295K-320K, recycling It is relatively difficult, and it is still the most critical factor restricting the further improvement of power generation efficiency. Therefore, at present, how to effectively recover and rationally utilize the heat of the low-temperature cold source in the power plant has become an important way to improve the power generation efficiency of traditional thermal power plants and alleviate energy problems. [0003] The temperature of the cold source of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/16F01K11/02F01K25/10F01D15/08F01D15/10F01K13/00F01K17/02F25B19/02
Inventor 邱琛李晓峰胡杰姚志宏黄菲菲鲁广栋
Owner 国能宿州热电有限公司
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