Method for quantitative estimation of fouling of the spacers plates in a steam generator

A vector and partition technology, applied in the field of blockage evaluation of partition channels, can solve problems such as inability to correctly estimate the blockage rate

Active Publication Date: 2016-10-12
ELECTRICITE DE FRANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, experience has shown that this is not the case, and thus the proposed method cannot correctly estimate the congestion rate

Method used

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  • Method for quantitative estimation of fouling of the spacers plates in a steam generator
  • Method for quantitative estimation of fouling of the spacers plates in a steam generator
  • Method for quantitative estimation of fouling of the spacers plates in a steam generator

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Experimental program
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Embodiment Construction

[0062] In a manner known to those skilled in the art, the method is started in the vicinity of the channel where at least one parameter depending on the clogging or the presence of magnetite is usually measured using a Foucault current probe, the measurement results of which show that the clogging, e.g. Impedance changes caused by iron ore.

[0063] Subsequently, at least one clogging index of the channel is deduced from the measurement result. The following description gives a non-limiting example of deriving such a congestion index.

[0064] After extracting the signal corresponding to the upstream side of the partition 10 being passed by the probe and the signal corresponding to the downstream side of the partition 10 being passed by the probe from the measurement signal, it is thus determined from the measurement signal that the downstream side of the partition 10 is passed by the probe. The probe passes through the corresponding lower edge signal, and the upstream edge o...

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PUM

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Abstract

The invention relates to a method for evaluating fouling of the passages of a spacer plate (10) of a shell-and-tube heat exchanger (11), wherein said passages (12a, 12b) are provided along the tubes (11) to allow fluid to flow through the spacer plate (10), wherein, for each of a plurality of at least one passage (12a, 12b): - at least one measurement of a parameter dependent on fouling or the presence of magnetite is made in the vicinity of the passage, - this measurement is used to derive at least one indicator of the fouling of said passage, characterized in that said fouling is evaluated by comparing a set of one or more fouling indicator vectors built from the fouling indicators thus obtained with a plurality of fouling indicator vector sets contained in a database, wherein each of said indicator vector sets is associated with a quantitative descriptor of fouling.

Description

technical field [0001] The present invention generally relates to the field of tube inspection of a tube heat exchanger. More precisely, the present invention relates to a method for clogging assessment of the channels of the partitions of a tube heat exchanger, said channels being arranged along the tubes and used for the circulation of a fluid within said heat exchanger through said plates. [0002] A steam generator generally consists of a bundle of tubes within which a hot fluid circulates and around which the fluid to be heated circulates. For example, in the case of steam generators in REP type nuclear power plants, the steam generators are heat exchangers that use the primary loop energy from the nuclear response for converting the secondary loop water into steam that will feed the turbines and Electricity is thus produced. [0003] The steam generator, by using the heat of the primary water, changes the secondary fluid from liquid water to steam at the saturation lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02G21C17/017
CPCG05B23/0221G21C17/017Y02E30/30F01K7/16G01N17/008G06F17/16G06F17/18
Inventor B·雷纳德N·保罗
Owner ELECTRICITE DE FRANCE
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