An Improved Condenser for Large Generating Sets

Abstract

The invention relates to the technical field of condensers, in particular to an improved large-size generator set condenser. The improved large-size generator set condenser comprises a shell body and two sets of main condensing tube bundles, wherein the main condensing tube bundles are arranged inside the shell body, one end of the shell body is provided with a steam inlet, the two sets of main condensing tube bundles are arranged on two sides of the inner portion of the shell body respectively in the steam flowing direction, a main steam channel is formed between the two sets of main condensing tube bundles, a plurality of sets of heat exchanging tube bundles are arranged in the middle of the main steam channel and arranged in a matrix mode, the number of transverse heat exchanging tube bundles is equal to the number of longitudinal heat exchanging tube bundles, the interval between every two adjacent heat exchanging tube bundles is the same, and a steam channel is formed between the heat exchanging tube bundles and the main condensing tube bundle outside the heat exchanging tube bundles. Compared with the prior art, the improved large-size generator set condenser reasonably increases the heat exchanging area and reasonably arranges added heat exchanging tube bundles so that aims of improving the vacuum degree of the condenser and reducing energy consumption are achieved, improving cost is low, a pay back period is greatly shortened, and the improved large-size generator set condenser is particularly suitable for energy-saving improvement of large-size generator set condensers with small cooling areas.

Description

technical field [0001] The invention relates to the technical field of condensers, in particular to an improved condenser of a large generating set. Background technique [0002] At present, there are more than 600 power plants and thermal power plants in China, most of which use condensing steam turbine generator sets, and the condenser is an important part of the steam turbine generator set. Create and maintain vacuum at the turbine exhaust. The vacuum degree of the condenser has a great influence on the operating safety and thermal economy of the generating set. [0003] According to statistics, compared with similar units in industrialized countries, the thermal power generation units below 600MW in my country generally have low vacuum and high heat consumption rate. However, for every 1% reduction in vacuum degree of thermal power generation units, the heat consumption increases by about 0.5. %~1%. For example, the vacuum degree of domestically imported 300MW generato...

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Problems solved by technology

[0004] In the prior art, the condenser tube bundles are arranged in mountain-shaped tube bundles, cathedral window-shaped tube bundles, oval tube bundles, etc. However, on the one hand, these tube bundle layouts all have eddy current dead zones to varying degrees, and the steam flow resistance is large. , high degree of supercooling of condensed water, poor condensation effect, etc.; on the other hand, the layout of these condenser tube bundles requires major changes to the condenser tube bundle and condenser structure, especially for large generator sets For the condenser, major changes to the equipment will cause a significant increase in investment, and not only reduce the economy and output of the generator set operation, but even affect the safety and reliability of the generator set operation

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