Coal-fired power plant peak regulation system based on integrated heat storage system

Abstract

The invention belongs to the technical field of coal power and particularly relates to a coal-fired power plant peak regulation system based on an integrated heat storage system. The coal-fired powerplant peak regulation system mainly comprises the integrated heat storage system, a coal-fired boiler, a high-and-medium-pressure cylinder, a low-pressure cylinder, a condenser, a power generator andelectrothermal conversion equipment. The integrated heat storage system is used to store heat of heat source such as boiler flue gas, high-and-medium-pressure cylinder inlet stream, low-pressure cylinder inlet steam and the electrothermal conversion equipment, and therefore, the task of peak regulation of a thermal power unit can be completed according to needs. According to the coal-fired power plant peak regulation system, a peak regulation requirement and an energy demand can be considered at the same time, a heat storage heat source and a heat storage user are flexibly selected, and the peak regulation range and the operational reliability of the power generation of a coal-fired power unit can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of coal power, and in particular relates to a coal-fired power plant peak regulation system based on an integrated heat storage system. Background technique [0002] As my country's social development enters a new normal, the adjustment of the existing energy consumption structure is facing a severe task; the most notable feature of the energy structure adjustment under the new situation is the increase in the proportion of wind power, photovoltaic and other renewable energy sources, and the proportion of coal-fired power plants in power generation. decline; for our country at present, coal-fired installed capacity is in a state of surplus, so for coal-fired units, the primary problem is to solve the problem of difficult peak regulation. For non-heating units, their own peak regulation capacity is usually It can only reach 40%, which is far from meeting the requirements of flexible power supply under the new s...

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Problems solved by technology

[0004] However, the current application of heat storage in coal-fired units usually has a single heat source, usually an electric boiler or heat extraction steam, and heat storage products are usually used in the field of district heating; the temperature of hot water required for heating usually does not exceed 130°C, which causes a large loss in the links of power conversion heat energy and boiler flue gas utilization; and, due to the difference in heat storage heat sources, it usually has different effects on the peak-shaving capacity and efficiency of the power plant. Power plants in different regions There are also differences in the demand for peak shaving capacity at different times

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