HIGH-TEMPERATURE RAGALUVO FOR MGO CALCINATION FURNAC

To improve the overall efficiency of an MgO calcination furnace, a high-temperature RAGALUVO (air preheater) was integrated to utilise waste heat. The hot exhaust air generated during the process is extracted after the recuperator but before the product filter and is specifically cooled via the newly installed high-temperature heat exchanger.

The recovered thermal energy is then used to further heat the fresh air (combustion air for the furnace), which has already been preheated by an existing air preheater. The previously used secondary cyclone is no longer required due to this new system.

This solution makes a significant contribution to increase energy efficiency and enables a more sustainable furnace operation while maintaining process reliability.

PROJECT DETAILS AT A GLANCE

• Constructed entirely from heat-resistant stainless steel 1.4828

• Shell-and-tube heat exchanger with vertically arranged heat exchanger tubes made of stainless steel 1.4828

• Factory-applied insulation with 200 mm insulation thickness

• Pre-assembled at the factory to reduce on-site installation time

• Process engineering design including structural calculations

• Turnkey transport and installation

TECHNICAL DATA

• Maximum temperature: 550 °C

• Design pressure: ± 65 mbar