Peak cooling device and method for air-cooling condenser in power plant

Abstract

The invention discloses a peak cooling system and method for an air-cooling condenser in a power plant. According to the peak cooling system, absorption heat pump equipment and accessory pipelines and valves are additionally installed in an original thermal system of a power plant unit. The method includes the steps that steam extracted by a steam turbine enters the absorption type heat pump through a first adjusting valve and is condensed to be water inside the absorption type heat pump and led into a condensation water side pipeline according to water temperature; dead steam of the steam turbine enters the absorption heat pump through a second adjusting valve, is condensed to be water inside the absorption heat pump in a heat release mode and directly enters a condensation water tank in a steam turbine regenerative system; part of the condensation water in the condensation water tank in the steam turbine regenerative system enters the absorption type heat pump through a third adjusting valve and led into a condensation water pipeline of the steam turbine unit regenerative system. By the adoption of the peak cooling device and method, the condition that in summer, the heat dissipation area of the air-cooling condenser is not sufficient is effectively is remitted, the vacuum degree of the unit can be effectively increased, the problem that the capacity of the air-cooling condenser is limited in summer can be solved, and the peak cooling device and method have high energy-saving benefits.

Description

technical field [0001] The invention relates to a summer peak cooling method for an air-cooled condenser, which is suitable for economical operation of an air-cooled unit in summer. Background technique [0002] Air-cooled condensers are often used in power plants in coal-rich and water-shortage areas in the north, using air to directly cool the exhaust steam of steam turbines. Considering investment, winter antifreeze and other factors, the air-cooled condenser is generally not designed according to the highest temperature in summer, but is designed according to the annual average temperature. In the northern region, the temperature difference between winter and summer is extremely large, which causes the unit to operate in summer with a low vacuum, resulting in poor thermal economy of the unit. In severe cases, it even needs to be forced to reduce output, which affects the power generation of the unit. [0003] At present, there are two main methods to solve this problem ...

AI Technical Summary

Problems solved by technology

However, this technology requires a high degree of cleanliness on the surface of the air-cooled condenser. Only when the surface is fully washed can the expected effect be achieved.

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