Improved large-size generator set condenser

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 present invention involves the field of condenser technology, especially a large -scale large generator crew condenser. Background technique [0002] At present, there are more than 600 power plants and thermal power plants in China, most of which use the condensate steam turbine generator set, and the condenser is an important part of the turbine generator set.Establish vacuum and maintain vacuum at the steam turbines.The vacuum of the condenser has a great impact on the operational safety and thermal economy of the generator set. [0003] According to statistics, compared with similar units in industrial developed countries, the thermal generators below 600MW are generally low and high in thermal consumption.%~ 1%.For example, the vacuum of domestic introduction of 300MW generator sets is generally between 91%and 94%, which is 3 to 6 percentage points lower than the design value, resulting in an increase of 8.16g / kWh of the power supply consumption of...

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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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