Thermoelectric unit thermoelectric decoupling system and operation method

Abstract

The invention discloses a thermoelectric unit thermoelectric decoupling system and an operation method. The system comprises a hearth, a heat exchange boiler and a heating station. A water outlet of the heat exchange boiler communicates with a third pipeline and a fourth pipeline, the third pipeline communicates with a water inlet of the heating station, and a water outlet of the heating station communicates with a fifth pipeline. The fifth pipeline is used for communicating with a circulating water inlet of a heat supply network user, the fourth pipeline communicates with the fifth pipeline,the water inlet of the heating station further communicates with a seventh pipeline, the seventh pipeline is used for communicating with a circulating water outlet of the heat supply network user, a water inlet of the heat exchange boiler communicates with a sixth pipeline, the sixth pipeline communicates with the seventh pipeline, a third valve is arranged on the third pipeline, a fourth valve isarranged on the fourth pipeline, a sixth valve is arranged on the sixth pipeline, and a seventh valve is arranged on the seventh pipeline. Thermoelectric decoupling of a thermoelectric unit is realized, and flexibility of the thermoelectric unit is improved.

Description

technical field [0001] The invention relates to the technical field of cogeneration of heat and power, in particular to a thermoelectric decoupling system and an operation method of a thermoelectric unit. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] As a large number of new energy sources are connected to the grid, and the proportion of foreign power and nuclear power is increasing, the deep peak regulation of thermal power plants has become a trend and is becoming more and more frequent. [0004] Thermal power units refer to thermal power units that are connected to the grid for power generation and heat supply. With the acceleration of urbanization, the urban heating area continues to increase, and the heat load demand is increasing. According to the current "heat-based power" model, priority is given to Residential heat supply cann...

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Problems solved by technology

[0004] Thermal power units refer to thermal power units that are connected to the grid for power generation and heat supply. With the acceleration of urbanization, the urban heating area continues to increase, and the heat load demand is increasing. According to the current "heat-based power" model, priority is given to Residential heat supply cannot meet the power requirements of the grid. This requires thermoelectric decoupling of the thermoelectric unit to improve the flexibility of the thermoelectric unit, that is, to maximize the power supply capacity under the premise of meeting the heat supply

[0005] At present, conventional thermoelectric decoupling includes low-pressure cylinder removal technology, high back pressure technology, heat storage tank, main steam bypass heating technology, etc., but there is a drawback in all of them, that is, using high-quality steam or electric heat to increase the heating capacity. Water, the overall energy utilization efficiency of the unit is low

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