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Upper bundle steam generator cleaning system and method

A technology for steam generators and cleaning equipment, which is applied in steam generation, components of steam boilers, steam boilers, etc., and can solve problems such as difficult steam generators

Inactive Publication Date: 2004-03-24
FOSTER-MILLER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, while the cleaning technique of removing deposits by blasting water streams is suitable for cleaning the tubes at the heated tube baffles on the bottom majority of the steam generator, the inherent design parameters of commonly used steam generators make it difficult to adopt at the upper tube bundle This technique to clean

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  • Upper bundle steam generator cleaning system and method
  • Upper bundle steam generator cleaning system and method
  • Upper bundle steam generator cleaning system and method

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Embodiment Construction

[0044] figure 1 A steam generator 10 is schematically shown comprising heat exchange tubes 12 divided into sections by tube support plates 14 , 16 , 18 , 20 , 22 , 24 and 26 . As shown in the first layer of tube support plates 14, each tube support plate includes a number of launders 28 and 30.

[0045] The W44 and W51 steam generators, designed by Westinghouse, account for the largest market share of steam generators, and the W51 is similar in size to the W44. The diameter of the tube supporting plate adopted by the W44 type steam generator is 116″, and the tube supporting plate above the heating tube partition is evenly spaced by 51a″. Two 6" diameter hand holes are provided, such as hand holes 36 at each end of a 3 1 / 2" discharge channel 38 at the level of the heater tube bulkhead 32. The support plate of each heater tube divider has three launders measuring 2-2 3 / 4″ x 15″ spaced 4″ on each side from the center tie rod 40. Align the launders with each other so that the di...

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Abstract

Disclosed is a cleaning equipment of an upper pipe bundle of a steam generator (10), which comprises an unfolding and supporting device (50) in which a cleaning head can be extended from a hand hole of the steam generator, the supporting device includes a plurality of extendable hydraulic cylinders for threading through a launder (71) to raise the cleaning head, so as to locate the cleaning head near the launder (71) of the upper pipe bundle; and the cleaning head fixed with the supporting device (50) is used for circling about the pipes of the upper pipe bundle of the steam generator (10) for spraying fluid, therefore the steam generator (10) is cleaned from up to down in the process of cleaning and sediments are washed out from the upside.

Description

technical field [0001] The present invention relates to an upper tube bundle cleaning device for a steam generator of a nuclear power plant, which eliminates the need for chemical cleaning techniques. Background technique [0002] The steam generator converts the thermal energy on the primary side of the nuclear power plant into steam on the secondary side, thus keeping the primary and secondary systems separate. A typical steam generator is a vertical cylinder consisting of a number of U-shaped tubes protruding from the steam generator bottom layer or "tube baffle". The high-temperature and high-pressure fluid from the nuclear reactor passes through the tubes in the steam generator, which will release energy to the water supply pipes around the tubes to be converted into steam, and when the steam is sent to the steam turbine, it will eventually generate power. [0003] The design life of the steam generator should be more than 40 years, but in fact, the reliability data ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B37/52F22B37/48F22B37/54F28G3/16F28G9/00F28G15/04
CPCF28G3/16F22B37/483F22B37/52
Inventor 奥古斯塔斯·阿什顿蒂莫西·洛维特丹·菲什巴克
Owner FOSTER-MILLER
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