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Online measurements of fireside high temperature corrosion in power plants with membrane wall sensors

Langen, Josef and Müller, Andreas and Ströhle, Jochen and Epple, Bernd (2016):
Online measurements of fireside high temperature corrosion in power plants with membrane wall sensors.
In: VGB PowerTech, pp. 66-70, 2016, (12), [Article]

Abstract

The Institute for Energy Systems and Technology of the TU Darmstadt develops corrosion measurement systems especially for evaporator walls of lignite- and hard coal-fired power plants. The fireside high temperature corrosion is determined time resolved by applying electrochemical measurement techniques. Therefore a new membrane wall sensor was developed which is passively cooled by the membrane wall and can be located in arbitrary positions of evaporator walls. To qualify the measurement technique for measurements in power plants, various tests were performed in lab-scale test facilities. Here, a high sensitivity with respect to a small content of corrosive gases (H2S) in a synthetic flue gas could be shown. Furthermore, corrosion measurements were performed in two power plants of which one has a strong corrosive atmosphere at evaporator walls and the other one has a low corrosive atmosphere. Accordingly high and low corrosion signals were measured in the two power plants, respectively.

Item Type: Article
Erschienen: 2016
Creators: Langen, Josef and Müller, Andreas and Ströhle, Jochen and Epple, Bernd
Title: Online measurements of fireside high temperature corrosion in power plants with membrane wall sensors
Language: English
Abstract:

The Institute for Energy Systems and Technology of the TU Darmstadt develops corrosion measurement systems especially for evaporator walls of lignite- and hard coal-fired power plants. The fireside high temperature corrosion is determined time resolved by applying electrochemical measurement techniques. Therefore a new membrane wall sensor was developed which is passively cooled by the membrane wall and can be located in arbitrary positions of evaporator walls. To qualify the measurement technique for measurements in power plants, various tests were performed in lab-scale test facilities. Here, a high sensitivity with respect to a small content of corrosive gases (H2S) in a synthetic flue gas could be shown. Furthermore, corrosion measurements were performed in two power plants of which one has a strong corrosive atmosphere at evaporator walls and the other one has a low corrosive atmosphere. Accordingly high and low corrosion signals were measured in the two power plants, respectively.

Journal or Publication Title: VGB PowerTech
Volume: 2016
Number: 12
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institut für Energiesysteme und Energietechnik (EST)
Date Deposited: 30 Jan 2018 14:04
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