Waste Heat Boilers
Big and Ugly
Waste Heat Boilers are a critical component in Waste Heat Recovery Systems and must be suitable to resist inlet gas temperatures exceeding 2600°F. Refractory lining and tubesheet design are critical in ensuring metal temperatures and stresses do not exceed Code and design limits.
Altex designs and fabricate Waste Heat Boilers to ASME VIII-Div.1 and ASME I Codes. FEA can be used in some cases for non-UHX tubesheet design, complicated geometries, and extreme temperature gradients.
Above 2-pass Waste Heat Boiler w/ integral Steam Drum is 14.75-ft wide x 35.5-ft long x 22.1-ft high and weighs 164-tons empty.
Scope of Supply:
- Steam drums w/ vane-pack and cyclone separator internals, risers, and downcomers
- Thermal and hydraulic guarantees
- Mechanical guarantee
- Finite Element Analysis (FEA)
Construction:
- Carbon Steel SA-179, SA-192, or 1-1/4 Cr-Mo T11 tubes, typical
- Weld-overlay and cladding available
- Strength-welded tube-tubesheet joints, including `deep-J’ groove
- Inner-bore welded tube-tubesheet joints - cold (shell) side of tubesheet
- UHX or ASME I flexible “knuckle” style tubesheets
- 1% slope typical
Engineering & Design:
- ASME Section I and Section VIII-Div.1
- Typically, non-code tubeside
- HTRI and in-house thermal design programs
- PV Elite, Code Calc, Compress, Nozzle-Pro, FE Pipe, 661 Pro, Flanged & Flued for mechanical.
- 3D modeling using Autodesk Inventor
- 2D fabrication drawings using AutoCAD.
Options and Trim:
- Spargers, vortex breakers
- Refractory – brick and castable
- Tube ferrules
- Insulation
- Weather shrouds / rain shields
