Steam discharge pipeline structure for directly preventing freezing of air condenser in winter

Abstract

The invention relates to a steam discharge pipeline structure for directly preventing freezing of an air condenser in winter, which belongs to the technical field of energy power. Each group of condenser units is divided into a left sheet and a right sheet, which are obliquely arranged; in an odd-number group of condenser units, fair current units and adverse current units are alternately arranged; one steam leading-out pipeline which is vertical to an ascending pipe and parallel to a steam distribution pipe is led out from each ascending pipe, a branch pipeline which is led out from each steam leading-out pipeline is respectively connected with a condensed water collection pipeline of the adverse current unit part of the condenser unit, and the steam leading-out pipeline is higher than the condensed water collection pipeline in the vertical direction. On the basis that the existing system is not greatly changed, partial steam is led out from the air condenser distribution pipe to be used for improving the distribution characteristics of the air condensed steam units, the large-area freezing of a steam side runner of the air condensation unit can be prevented and inhibited, an effect for rapidly thawing can be realized when the condensed water collection pipeline is frozen, an air cooling unit can be maintained to run safely under the low backpressure simultaneously, and the economical performance can be improved.

Description

technical field [0001] The invention belongs to the technical field of energy and power, and in particular relates to an exhaust pipe structure used for direct air-cooled condensers to prevent freezing in winter. Background technique [0002] Air-cooling technology, as a key technology for developing large-scale, high-parameter coal-fired generating units in the coal-rich and water-deficient areas of northern my country, has developed rapidly with the strong support of relevant national policies. The direct air-cooled condenser uses air instead of water as the cooling medium to cool the exhaust steam of the steam turbine. Due to the low air density, small specific heat, and low thermal conductivity, the air-cooled condenser has a large area and a large number of air-cooled units, which are easily affected by external environmental factors during operation. A large number of engineering practices have shown that when the ambient temperature is lower than 0 degrees Celsius, t...

AI Technical Summary

Problems solved by technology

A large number of engineering practices have shown that when the ambient temperature is lower than 0 degrees Celsius, the steam side channel of the air-cooling unit is prone to freezing, causing damage to the air-cooling fin tube bundle and affecting the safe operation of the air-cooling power station

At present, in order to avoid the above situation, the active units usually adopt high back pressure operation mode, which reduces the economical efficiency of unit operation and seriously affects the economic benefits of power generation enterprises

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