Sandvik electric regeneration heaters are suitable for heating air and nitrogen in air separation units in steel and alloy plants. The regeneration heaters are generally used in oxygen plants for regeneration of the molecular sieve. Steel plants normally have high-capacity oxygen production units installed. Read more about the molecular sieve bed regeneration process.
Materials of construction
Sandvik regeneration heaters consist of tubular elements installed in baffle cage assemblies with tie rods holding the assembly together.
The elements and internals are constructed of alloy 800, and the vessel and tube-sheet are of stainless steel of the types ASTM 321H, 316Ti or alloy 800.
Temperature and capacity range
Sandvik regeneration heaters have an operating temperature range of 10°–350°C (50°–662°F).
Available in capacities from 1–10000 kW, Sandvik electric process heaters have smaller footprints. They are virtually 100% efficient and there is no risk of fouling that creates a need for frequent cleaning.
For heating duties of more than 400 kW, electric process heaters are commonly used to heat air because waste heat recovery for this duty and these temperatures is not possible.