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System and method for realizing thermoelectric decoupling by using light and heat

A technology of photothermal and cogeneration units, applied in the field of thermoelectric decoupling, which can solve the problems that the back pressure heating units do not participate in peak regulation and the heating parameters cannot be adjusted.

Pending Publication Date: 2020-03-17
SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a system and method for realizing thermoelectric decoupling by using light and heat to solve the problems that the back pressure heating unit does not participate in peak regulation and the heating parameters cannot be adjusted, so as to help realize thermoelectric decoupling

Method used

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  • System and method for realizing thermoelectric decoupling by using light and heat

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Embodiment 1

[0042] The photothermal working medium adopts molten salt, the internal temperature of the cold molten salt storage station is 180-200°C, and the internal temperature of the hot molten salt storage station is 420-450°C.

[0043] The shells of the hot working medium storage station 2 and the cold working medium storage station 4 are provided with safety valves and liquid level gauges, the safety valves are used for pressure relief of the shells, and the liquid level gauges are used for monitoring the heat storage capacity. The casings are provided with insulation layers. The hot working medium storage station 2 and the cold working medium storage station 4 have different elevations, the hot working medium storage station 2 is arranged at a high position, and the cold working medium storage station 4) is arranged at a low position, and a flow control valve 3 is set on the connecting pipeline.

[0044] When the intensity of sunlight is high, the molten salt is delivered by the mo...

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Abstract

The invention provides a system and method for realizing thermoelectric decoupling by using light and heat. A working medium pump is used for transferring a working medium in a cold working medium storage station to a heat collector; the working medium absorbs heat through the heat collector to form high temperature fluid; and the high temperature fluid is fed into a hot working medium storage station under the action of the pressure of the pump. A flow control valve is used for controlling the flow rate of a hot working medium entering a heat exchanger; feed water with the temperature lower than 100 DEG C is heated to generate the steam with the relatively high temperature; the steam with the relatively high temperature enters the heat exchange station to provide heat for heat users; andthe working medium with the temperature lower than 100 DEG C after cooling returns to the cold working medium storage station. As part of the steam in the heating steam comes from the new heating steam of a photothermal system, the heating load coming from a back-pressure turbine is reduced, the electrical load is also reduced simultaneously, and thus, the back-pressure turbine participates in thepower grid peak regulation in the heating mode; and the accumulated heat of the working medium storage station can be used for adjusting the heating load, thereby adjusting the electrical load and quickly participating in frequency modulation. When heat collecting plates do not work, the hot working medium in the hot working medium storage station can still be used for heating the feed water forauxiliary heating so as to enable the unit to have peak and frequency regulation capabilities.

Description

technical field [0001] The invention relates to a thermal power generation control system, in particular to a system and method for realizing thermoelectric decoupling by using light and heat. Background technique [0002] The power industry is the foundation of the national economy. With the change of power consumption demand and power consumption structure of power users in my country, the peak-to-valley difference between day and night gradually increases, and the peak-to-valley difference can reach 30%-40% of the peak load of power generation. under great pressure. For combined heat and power units, the electrical load of the unit is limited by heating and cannot participate in the peak regulation of the unit, which intensifies the peak regulation pressure of the power grid and further aggravates the situation of curtailment of wind and solar. [0003] Chinese patent 201210543440.2 discloses a heat utilization system and method that realizes the combination of solar the...

Claims

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Application Information

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IPC IPC(8): F01K11/02F01K17/02F01K13/02F01D15/10F24S10/30F24S60/00F22B1/00
CPCF01K11/02F01K17/02F01K13/02F01D15/10F22B1/006Y02E20/14
Inventor 黄晨武广富黄素华王健沈丛奇
Owner SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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