FLUE GAS CONVECTION SECTION IN STEAM REFORMER PLANTS FOR AMMONIA, METHANOL, HYDROGEN PRODUCTION

waste heat steam

The combustion process in a steam reformer generates flue gas which leaves the reformer at about 1,830°F (1.000°C) and is then cooled down to temperatures below 355°F (180°C) in the convection section.

Preferably the recovered heat is returned to the steam reforming process, making the flue gas cooling system an integral part of a steam reforming plant.

All process and site specific requirements must be taken into account and integrated in the design. Different types of heat exchangers and a wide variety of arrangements are possible.

TYPICALLY ARE:

  • 2-stage reformer, feed superheaters, hairpin type
  • Steam superheater, hairpin type
  • Combustion air preheater, second stage, tube bundle type or plate type
  • Steam generator, tube bundle type
  • Combustion air preheater, first stage, tube bundle type or plate type

Depending on the process requirements an additional pre-reformer feed preheater as well as a natural gas preheater made as hairpin type can be supplied. For some processes a boiler feed water economizer or even a process condensate preheater is required.