2nd Year Comparison of Superheater Metal Wastage Rates Utilizing Various Boiler Tube Alloys in a Waste-to-Energy Facility

2003 ◽  
Author(s):  
Eric Hanson ◽  
Mark Turner
Keyword(s):  
Base Material ◽  
Waste To Energy ◽  
Inconel 625 ◽  
Turbine Generator ◽  
Weld Overlay ◽  
Time Period ◽  
Energy Facility ◽  
Energy Plant ◽  
Wastage Rate ◽  
Incoloy 825

The SEMASS Resource Recovery Facility (SEMASS) is a processed refuse fuel (PRF) waste-to-energy plant serving Southeastern Massachusetts. The plant consists of three 1000 ton per day boilers that generate steam at 765 F and 650 psig for use in a steam turbine/generator set. Over the past several years there have been a series of plant improvements made in order to achieve compliance with the MACT emission standards. Unfortunately, metal wastage rates due to fire side corrosion of pressure containing components, have increased significantly during this same time period. In an attempt to reduce overall maintenance costs and unscheduled down time due to tube failures, a test of various alloy tube materials was undertaken in 2001 (see NAWTEC#10 paper-1021) in the primary superheater section of boiler #1. The materials tested were SA213-T22 (original spec.), SA213-T22-Heavy Wall, SA213-TP310H, SB-423 Incoloy 825, and Inconel 625 spiral weld overlay of SA213-T22 base material. This paper will summarize the results of the second year of testing including wastage rate tables and annualized costs for the various tube materials.

Comparison of Superheater Metal Wastage Rates Utilizing Various Boiler Tube Alloys in a Waste-to-Energy Facility

2002 ◽  
Author(s):  
Mark Turner ◽  
Eric Hanson
Keyword(s):  
Base Material ◽  
Waste To Energy ◽  
Inconel 625 ◽  
Turbine Generator ◽  
Weld Overlay ◽  
The Past ◽  
Economic Justification ◽  
Energy Facility ◽  
Energy Plant ◽  
Incoloy 825

The SEMASS Resource Recovery Facility (SEMASS) is a processed refuse fuel (PRF) waste-to-energy plant serving Southeastern Massachusetts. The plant consists of three 1000 ton per day boilers that generate steam at 765 F and 650 psig for use in a steam turbine/generator set. Over the past several years, metal wastage rates due to fire side corrosion of pressure containing components, have increased significantly in all three boilers. In an attempt to reduce overall maintenance costs and unscheduled down time due to tube failures, a test of various alloy tube materials was undertaken in the primary superheater section of boiler #1. The materials tested were SA213-T22 (original spec.), SA213-TP310H, SB-423 Incoloy 825, and Inconel 625 spiral weld overlay of SA213-T22 base material. This paper will discuss the results of the test after 9 months of service and any conclusions developed on the economic justification for upgrading tube materials in the remaining two boilers.

Superheater Life With Stainless, Inconel, and Carbon Steel Alloys at the Maine Energy Recovery Company

2004 ◽  
Author(s):  
Ken Robbins ◽  
Ken Huard ◽  
John King
Keyword(s):  
Energy Recovery ◽  
Waste To Energy ◽  
Production Operation ◽  
Gas Temperature ◽  
Turbine Generator ◽  
Design Changes ◽  
Energy Facility ◽  
Refuse Derived Fuel ◽  
Commercial Operation ◽  
History Of

The Maine Energy Recovery Company is a refuse derived fuel (RDF) waste to energy facility that began commercial operation in 1987. The facility consists of an RDF production operation, two B&W boilers which produce 210,000 lb/hr of steam at 650 psig/750F with a design Furnace Exit Gas Temperature of 1700 F, and a 22 MW steam turbine generator. Since startup, the facility has suffered fireside erosion/corrosion of the waterwalls, superheater, and generator bank hot side sections. Through the years, Maine Energy has made various operational and design changes in order to improve combustion and overall boiler availability. While combustion has improved as evidenced by improved emissions, reduced supplemental fuel usage, and lower ash production, superheater availability has suffered. At the same time reliability of the waterwall and generating bank components have improved. This paper will present a history of Maine Energy’s efforts to improve its superheater availability including a summary of the tube wastage rates for various superheater alloys, as well as Maine Energy’s plans for its superheaters.

Laser treatment with 625 Inconel powder of hot work tool steel using fibre laser YLS-4000

2018 ◽  
Vol 2 (92) ◽  
pp. 60-67
Author(s):  
L.A. Dobrzański ◽  
E. Jonda ◽  
W. Pakieła ◽  
M. Dziekońska
Keyword(s):  
Chemical Composition ◽  
Laser Treatment ◽  
Laser Cladding ◽  
Tool Steel ◽  
Heat Affected Zone ◽  
Base Material ◽  
Substrate Material ◽  
Inconel 625 ◽  
Fibre Laser ◽  
Weld Overlay

Purpose: The purpose of this investigation was to determine the changes in the surface layer (Inconel 625), obtained during the laser treatment of tool-steel alloy for hot work by the use high-power fibre laser. Design/methodology/approach: Observations of the layer structure, HAZ, and substrate material were made using light and scanning microscopy. The composition of elements and a detailed analysis of the chemical composition in micro-areas was made using the EDS X-ray detector. The thickness of the resulting welds, heat affected zone (HAZ) and the contribution of the base material in the layers was determined. Findings: As a result of laser cladding, using Inconel 625 powder, in the weld overlay microstructure characteristic zones are formed: at the penetration boundary, in the middle of weld overlay and in its top layer. It was found that the height of weld overlay, depth of penetration, width of weld overlay and depth of the heat affected zone grows together with the increasing laser power. Practical implications: Laser cladding is one of the most modern repair processes for eliminating losses, voids, porosity, and cracks on the surface of various metals, including tool alloys for hot work. Laser techniques allow to make layers of materials on the repaired surface, that can significantly differ in chemical composition from the based material (substrate material) or are the same. Originality/value: A significant, dynamic development in materials engineering as well as welding technologies provides the possibility to reduce the cost of production and operation of machinery and equipment, among others by designing parts from materials with special properties (both mechanical and tribological) and the possibility of regeneration of each consumed element with one of the selected welding technologies.

Influence of Boiler Pipe Cladding Techniques on their Microstructure and Properties

2013 ◽  
Vol 58 (4) ◽  
pp. 1093-1096 ◽  
Author(s):  
M. Rozmus-Górnikowska ◽  
M. Blicharski ◽  
J. Kusińsk ◽  
L. Kuslnski ◽  
M. Marszyck
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Base Material ◽  
Inconel 625 ◽  
Weld Overlay ◽  
Overlay Coating ◽  
Microstructure And Properties ◽  
Microstructure And Mechanical Properties ◽  
Steel Boiler

Abstract The aim of this work was to investigate different weld overlay coating technologies applied to steel boiler pipes and their influence on microstructure and properties of the produced overlays. The investigations were carried out on the boiler pipes weld overlaid by an Inconel 625 and cladded at various conditions (CMT, GMAW and GTAW). The investigations showed that microstructure and mechanical properties of overlaid pipes depend on cladding technology and the chemical composition of the base material.

scholarly journals TEM Microstructure and Chemical Composition of Transition Zone Between Steel Tube and An Inconel 625 Weld Overlay Coating Produced by CMT Method

2017 ◽  
Vol 62 (2) ◽  
pp. 787-793 ◽  
Author(s):  
M. Rozmus-Górnikowska ◽  
M. Blicharski
Keyword(s):  
Chemical Composition ◽  
Transition Zone ◽  
Room Temperature ◽  
Ion Beam ◽  
Base Material ◽  
Steel Tube ◽  
Inconel 625 ◽  
Cold Metal Transfer ◽  
Weld Overlay ◽  
Overlay Coating

AbstractThe aim of this work was to investigate the microstructure and chemical composition of the transition zone between 16Mo3 steel and Inconel 625 weld overlay coating produced by the Cold Metal Transfer (CMT) method. Investigations were primarily carried out through transmission electron microscopy (TEM) on thin foils prepared by FIB (Focus Ion Beam).The chemical analysis demonstrated that the amount of certain elements (Fe, Ni, Cr, Mo, Nb) in the transition zone between the base material and the weld overlay changes quickly, from the composition of the steel to the composition of the composite zone. STEM and TEM investigations revealed that two areas are clearly visible in the transition zone. In the narrow band close to the fusion boundary where plates are clearly visible and theMstemperature is higher than room temperature, electron diffraction analyses show reflections of martensite and austenite. Moreover, the crystallographic relations between martensite and austenite can be described by the Kurdjumov-Sachs (K-S) relationship$\{ 110\} _{\alpha '} ||\{ 111\} _\gamma < 1\bar 11 > _{\alpha '} || < 1\bar 10 > _\gamma $). The microstructure of the part of the transition zone with anMstemperature lower than room temperature as well as that of the composite zone is austenite. The investigations proved that the width of the martensitic area can be significantly limited by using the CMT technique for weld overlaying.

scholarly journals Performance of an amine-based CO2 capture pilot plant at the Fortum Oslo Varme Waste to Energy plant in Oslo, Norway

2021 ◽  
Vol 106 ◽  
pp. 103242
Author(s):  
Johan Fagerlund ◽  
Ron Zevenhoven ◽  
Jørgen Thomassen ◽  
Marius Tednes ◽  
Farhang Abdollahi ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Pilot Plant ◽  
Waste To Energy ◽  
Energy Plant
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