Steam distribution device for direct air-cooled condenser for power station

Abstract

The invention relates to a steam distribution device for a direct air-cooled condenser of a power station. The steam distribution device comprises steam distribution pipes, steam distribution pipe boxes and fin-type heat exchange pipe bundles, wherein the steam distribution pipes are communicated with the fin-type heat exchange pipe bundles through the steam distribution pipe boxes; flow guide grooves are formed in the steam distribution pipes, are located at the front ends of the steam distribution pipe boxes and are communicated with the steam distribution pipe boxes; the flow guide grooves are inclined grooves below the steam distribution pipes and welded together with the steam distribution pipes; the ports at the rear parts of the flow guide grooves are welded and communicated with the front end parts of the steam distribution pipe boxes; and of the flow guide grooves, the slope is 5-8 degrees, the length is 3-5 mm and the width is the same as that of the steam distribution pipe boxes. The steam distribution device has the advantages that the structure is simple, the steam can transit to the fin-type heat exchange pipe bundles smoothly and uniformly, the generation of vortex flow is avoided, the heat exchange characteristic of the air-cooled condenser is improved, the service life of the fin-type heat exchange pipe bundles is prolonged, and both the safety and the economical efficiency of the air-cooled unit in running are improved.

Description

technical field [0001] The invention belongs to the field of energy and power, and in particular relates to a steam distribution device for a direct air-cooled condenser of a power station, which is suitable for a direct air-cooled thermal power station. Background technique [0002] The uneven distribution of energy in my country's "Three Norths" region, which is rich in coal and lacks water, has promoted the development of air-cooling technology. Direct air cooling technology uses air as the cooling medium to cool the steam after the work done by the steam turbine. The flow process of steam in the air-cooled island is: after the steam is discharged from the low-pressure cylinder of the steam turbine, it rises to a certain height through the main steam pipeline, flows laterally in the distribution main pipe and enters the distribution branch pipe, and finally distributes in the steam distribution pipe through the steam distribution pipe box to Each air-cooled condenser. H...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the steam vortex in the prior art caused by the existence of the steam distribution pipe box that adversely affects the heat exchange of the direct air-cooled condenser, and to provide a simple structure that makes the steam stable and uniform. Transition to finned heat exchange tube bundles, avoid the generation of eddy currents, improve the operating characteristics of the air-cooling system, high reliability steam distribution device for direct air-cooled condensers in power stations

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