Ammonia-doped power plant indirect air cooling system and control method thereof

Abstract

The invention provides an ammonia-doped power plant indirect air cooling system and a control method thereof, and belongs to the field of thermal power plants. The control method specifically comprises the steps that operation data of a power plant are monitored, and whether regulation and control are conducted or not is judged according to the temperature difference of the outlet water temperature of an indirect cooling tower and the outlet water temperature of a liquid ammonia gasification heat exchanger; if regulation and control are needed, the circulating water flow of the indirect cooling tower is adjusted, the adjusted temperature difference is calculated, and if the temperature difference is smaller than the first preset temperature, the opening degree of a shutter of the indirect cooling tower is reduced or the total circulating water flow of the air cooling system is increased; if the temperature difference is larger than the second preset temperature, increasing the shutter opening degree of the indirect cooling tower, reducing the total flow of circulating water of the air cooling system or reducing the unit load, and then continuing monitoring; and if the temperature difference is between the first preset temperature and the second preset temperature, indicating that the air cooling system is in the optimal operation state, and returning to continue monitoring. The temperature difference between the water outlet of the indirect cooling tower and the water outlet of the liquid ammonia gasification heat exchanger serves as the standard, different adjusting schemes are determined according to the preset conditions, and the cooling effect of the indirect cooling tower can be effectively improved.

Description

technical field [0001] The invention belongs to the field of thermal power plants, and more specifically relates to an indirect air-cooling system of an ammonia-doped power plant and a control method thereof. Background technique [0002] Co-combustion of carbon-free fuels (such as ammonia) in thermal power plants such as coal, biomass, solid waste, and natural gas is an emerging CO 2 ways to reduce emissions. Ammonia, as a "zero-carbon hydrogen-rich" emerging fuel, can be produced by electrolyzing water with renewable electricity, and synthesizing ammonia from hydrogen and nitrogen (air separation). Transportation and other advantages can promote the consumption and fuel utilization of renewable energy. Northwest my country, North China and other regions are rich in renewable resources such as wind energy and solar energy, and have sufficient power resources for the production of synthetic ammonia. The rich coal and ammonia resources are capable of realizing low-carbon po...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is to provide an indirect air cooling system and its control method for an ammonia-doped power plant, aiming to solve the problem that the existing indirect air-cooling system control method cannot meet the requirements of air cooling and liquid ammonia gasification cooling for an ammonia-doped power plant. Reasonable allocation and real-time regulation

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