Skip to Main content Skip to Navigation
Theses

Étude des phénomènes de corrosion à haute température en environnement type UVED : développement d'un pilote laboratoire et quantification des paramètres clés gouvernant les mécanismes

Abstract : Municipal Solid Waste Incineration (MSWI) allows reducing the disposal volume and creates energy from a waste source. Waste to Energy (WTE) plants are equipped with heat exchangers that recover the heat produced from burning solid waste through metallic tubes inside steam circulates. The municipal solid waste combustion generates highly corrosive flue gas containing species like HCl, SO2, alkali and metals chlorides and ashes containing alkali chlorides and sulphates. Moreover, velocity of flue-gas containing ashes can influence the tube degradation. An innovative laboratory-scale corrosion pilot, which reproduces MSWI boilers conditions, was built. The temperature gradient at flue-gas/tube interface and the velocity of flue-gas throughout the tubes are reproduced. This way, the material degradations are simulated, as realistic as possible. The main parameters responsible of the materials corrosion were studied and controlled: temperature difference between gases and metallic tube, partial pressure of HCl and SO2 and ash composition. In order to evaluate the material degradation during the corrosion tests, some parameters were carefully observed: corrosion rate, identification of the corrosion products and the thickness of different corrosion layers. The analysis of the results led to the identification of two corrosion mechanisms: at low temperature the corrosion is caused by the gas phase (high amounts of HCl increase corrosion rates, while SO2 contents tend to reduce), at high temperature the corrosion is caused by the action of melted phases. Finally, results showed that the corrosion rate is enhanced by the presence of alkali chloride in the ashes.
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01746311
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 10:30:44 AM
Last modification on : Thursday, November 12, 2020 - 2:30:08 PM
Long-term archiving on: : Thursday, September 13, 2018 - 11:42:24 AM

File

SCD_T_2008_0012_LEBEL.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01746311, version 1

Collections

Citation

Florimonde Lebel. Étude des phénomènes de corrosion à haute température en environnement type UVED : développement d'un pilote laboratoire et quantification des paramètres clés gouvernant les mécanismes. Autre [cond-mat.other]. Université Henri Poincaré - Nancy 1, 2008. Français. ⟨NNT : 2008NAN10012⟩. ⟨tel-01746311⟩

Share

Metrics

Record views

92

Files downloads

141