Heat Recovery from Annealing Furnace Exhaust Gases

As part of an energy efficiency initiative, two heat recovery systems were installed to capture waste heat from electrically heated annealing furnaces. Previously, the hot exhaust gases from both furnaces were combined and cooled to approximately 170 °C using dilution air before passing through a bag filter – without any energy being recovered.

With the installation of the new heat recovery systems, this previously unused thermal energy is now efficiently utilised. The recovered heat is fed into the local or plant-wide heating network, contributing significantly to sustainable energy use and emission reduction.

Project Highlights at a Glance

• Two heat recovery units for capturing energy from exhaust gases

• Engineering – including full system design and planning

• Transport & installation of all system components

• Support steel structures for secure on-site integration

• Exhaust-side integration, including bypass switching

• State-of-the-art instrumentation and control (I&C) with safety functions

• High-quality insulation to minimise energy losses

Technical data: 

Return temperature: 65°C
Rated output: 2 x 223kW