Solar photo-thermal heat storage system and method of deep peak regulation of combined heat and power generation unit

Abstract

The invention relates to a solar photo-thermal heat storage system and method of deep peak regulation of a combined heat and power generation unit. A solar photo-thermal heater and a hot water heat storage tank system are arranged in a thermal power generating unit system; in a non-peak regulation period, the solar photo-thermal heater is used for heating circulating water and cold water of the heat supply network; exhaust steam of a pressure cylinder in the unit can be extracted from the part with insufficient heating; the heat supply network cold water is heated through the heat supply network heat exchanger, the heated water is stored in the heat storage water tank; in the period needing deep peak regulation, the hot water in the heat storage water tank is supplied to the heat supply network primary network system, so that deep peak regulation is realized, meanwhile, the power generation load is reduced, and continuous and stable operation of the unit is ensured. In the whole peak shaving process, the solar photo-thermal heating technology and the hot water heat storage technology are applied, the online peak shaving capacity of the unit is improved, the operation energy consumption of the unit is reduced, and the difficulty of energy consumption is effectively relieved.

Description

technical field [0001] The invention belongs to the technical field of electric power energy, and in particular relates to a solar photothermal heat storage system and method for deep peak regulation of a combined heat and power unit. Background technique [0002] In recent years, the increase in energy demand and the depletion of fossil energy have led to the rapid development of technologies related to renewable resources. In terms of electricity, wind power and photovoltaics have achieved sustained and rapid development. However, there are also common technical problems, such as serious wind and light abandonment problems. One of the main factors leading to the problem of abandoned wind and light is the limitation of wind power and photovoltaic capacity. Consumption has become a key factor restricting the development of domestic wind power and photovoltaics, and the situation is becoming increasingly severe. To solve the problem of wind power and photovoltaic consumptio...

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Problems solved by technology

[0012] Although the above technologies can achieve a certain peak-shaving effect, they cannot achieve the purpose of deep peak-shaving due to safety issues such as boilers and turbines.

For example, electric boiler technology only consumes electricity load internally and converts it into heat supply, which does not save energy; low-load operation will cause excessive emissions of system equipment such as desulfurization and denitrification

At the same time, in the existing steam extraction heat supply power plant, there are still problems of heat supply waste or insufficient heat supply when the peak shaving system performs power peak shaving

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