Multi-area tube bundle of condenser

Abstract

The invention relates to a multi-area tube bundle of a condenser, which is characterized in that the multi-area tube bundle consists of at least two rows of small tube bundles, wherein steam flow channels are at two sides of each row of small tube bundles, a bottom reheating area is at the lower part of the small tube bundle, each row of small tube bundles comprises a trapezoidal main condensing area, a steam toward area is formed at the upper end of the main condensing area, an octagonal blank area is reserved at the bottom of the main condensing area, the axis of the octagonal blank area is overlapped with the axis of the main condensing area, the axis in the main condensing area is provided with an air pumping passage which is communicated with the octagonal blank area, the left side and the right side of the main condensing area are symmetrically provided with downwards oblique small steam passages, the middle part of the octagonal blank area is provided with an oblong air cooling area, and the main condensing area and the air cooling area are formed by tightly arranging tubes in triangular arrangement with each other. The multi-area tube bundle of the condenser has the advantages of smooth steam flow line, no dead area and good heat transfer performance.

Description

technical field [0001] The invention relates to a multi-region tube bundle of a condenser, which is applied to condenser equipment in the power station industry. Background technique [0002] The condenser is one of the important equipment in the thermal system of the power station. When the circulating water pump and the auxiliary equipment such as the vacuum pump work normally, the efficiency of the steam turbine device will increase by 1 to 2% every time the vacuum degree of the condenser is reduced by 1kPa, so how can it be It is especially important to improve the economy of large-scale units to obtain an ideal vacuum degree. [0003] Large-scale condensation will occur when the steam first enters the tube bundle, and the gas content in the steam is very small at this time; at the same time, in the steam-air mixture extraction area, the condensation phenomenon occurs very slowly, and the condensed water produces serious supercooling phenomenon; When the steam first ent...

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Problems solved by technology

[0003] Large-scale condensation will occur when the steam first enters the tube bundle, and the gas content in the steam is very small at this time; at the same time, in the steam-air mixture extraction area, the condensation phenomenon occurs very slowly, and the condensed water produces serious supercooling phenomenon; When the steam first enters the tube bundle, the scouring intensity of the top row of tube bundles and the resistance to the flow of the vapor phase are large; the layout of the tube bundle is unreasonable, and the heat load distribution is uneven, resulting in dead heat transfer angles, which affect the average heat transfer temperature difference; unreasonable layout of the tube bundle , the arrangement is too dense, resulting in high vapor resistance; the unreasonable arrangement of tube bundles, resulting in insufficient space for heat recovery, resulting in supercooling of condensed water and high oxygen content, which is a great hazard to the safety of the entire unit

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