A direct air-cooled condenser air inlet cooling diffuser guide device

Abstract

The invention relates to an intake air cooling diffusion diversion device for a direct air-cooled condenser, which comprises a steel frame. The upper part of the steel frame is provided with a plurality of air cooling units. The intake air cooling diffusion diversion device is characterized by being provided with a plurality of cooling diffusion diversion boxes, wherein each cooling diffusion diversion box is arranged on the steel frame and coats the steel frame; air ducts are uniformly distributed in cavities of the cooling diffusion diversion boxes; environmental wind flows to the air cooling units from the outsides of the cooling diffusion diversion boxes through the air ducts; the through-flow area of an inlet of each air duct is less than that of an outlet of the air duct; cooling water passages are formed between the air ducts; and the upper and lower side walls of each cooling diffusion diversion box are respectively provided with a cooling water inlet and a cooling water outlet. According to the invention, the range of a negative pressure region near a suction inlet of a fan of the air-cooled condenser can be effectively shortened, the intake air temperature of the air-cooled condenser is reduced and heat exchange efficiency of the air-cooled condenser is promoted. In the process that heavy wind flows through the device, the wind speed is reduced and the pressure is increased, so that the air flow of each air cooling unit is increased; and meanwhile, by cooling of cooling water, the intake air temperature of the air-cooled condenser can be reduced.

Description

technical field [0001] The invention relates to an energy-saving device for a power plant, in particular to an air inlet cooling diffuser guide device for a direct air-cooled condenser of a power plant, and belongs to the technical field of power generation. Background technique [0002] In my country's coal-rich and water-scarce areas, direct air-cooled units have developed rapidly due to their water-saving characteristics. However, the air-cooled condenser of the direct air-cooled unit uses air as the medium for cooling the exhaust steam of the steam turbine, and the performance of the air-cooled condenser is greatly affected by the ambient wind and the inlet air temperature. The reduction of the heat transfer efficiency of the air-cooled condenser under strong wind conditions is a common problem faced by direct air-cooled units. Under the action of ambient wind, a negative pressure zone will be formed near the suction inlet of the air-cooled condenser fan. On the one ha...

AI Technical Summary

Problems solved by technology

On the one hand, the existence of the negative pressure area will cause the performance of the fan of the air-cooled condenser to decline, which will reduce the cooling air flow and deteriorate the cooling effect; Air inlet temperature rises, cooling effect deteriorates

In addition, the high inlet air temperature in summer is also one of the main reasons for the decline in the heat exchange efficiency of the direct air-cooled condenser, which increases the back pressure of the steam turbine unit and deteriorates the thermal economy.

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