Cooling unit of direct air-cooling steam condenser

Abstract

A cooling unit of a direct air-cooling steam condenser is composed of an air-cooling cooling unit body and a fan located on the lower portion of the air-cooling cooling unit. The air-cooling cooling unit body comprises a main heat exchange surface and a top heat exchange surface, the main heat exchange surface forms a hyperboloid shape by arraying of a group of main heat exchange pipes with axes being hyperbolic curves, upper ends of the main heat exchange pipes are communicated with a circular connecting pipe, and lower ends of the main heat exchange pipes are communicated with a circular condensed-water return pipe; the top heat exchange surface is located at the top of the main heat exchange surface, the top heat exchange surface comprises a steam distributing pipe and a group of top heat exchange pipes, and two ends of the top heat exchange pipes are respectively communicated with the steam distributing pipe and the connecting pipe. By the arrangement, capability of heat exchange of the air-cooling cooling unit is favorably enhanced, heat exchange efficiency is improved, economical efficiency of the air cooling unit is improved, and energy saving and consumption reducing of large-scale units of relevant industries especially power industry are improved.

Description

technical field [0001] The invention relates to a heat dissipation and cooling device of a power plant, in particular to a heat dissipation unit of a direct air-cooled condenser which adopts a main heat exchange surface of a hyperboloid structure to increase heat exchange capacity. Background technique [0002] Thermal power plants mostly use air cooling to cool the exhaust steam of steam turbines, and the air-cooled island composed of dozens of air-cooled heat dissipation units is used as the main heat dissipation equipment for steam turbine exhaust in power plants. The air-cooled heat dissipation unit is composed of a fan and the corresponding air-cooled heat dissipation unit body. The air-cooled heat dissipation unit relies on the fan to generate forced convection, uses the air to take away heat, and condenses the steam into water to keep the exhaust pressure of the steam turbine stable at the design value. Generally speaking, increasing the air flow and increasing the ai...

AI Technical Summary

Problems solved by technology

However, this will mean that the power consumption of the cooling fan is increased or the blades are lengthened, which is not conducive to equipment installation and economical operation

At present, the commonly used air-cooled heat dissipation unit body is A-shaped, such as image 3 As shown, it includes steam distribution pipes, two rectangular heat dissipation surfaces composed of tube bundle fins and condensate recovery pipes. The two rectangular heat dissipation surfaces are arranged in an A shape. Defects of unreasonable thermal surface structure design

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