Radiant to convection transition for fired equipment
AssigneePCL Industrial Services, Inc.
InventorsMark Elmer Pittser, Zachary Mark Smith, Garry Loren Barker
Life of this patent
Estimating the term…
Abstract
Modern steam generators typically include a radiant section and a convection section. Due to differing performance requirements of the radiant and convection sections, the radiant section often has a round cross-section, while the convection section often has a rectangular cross-section. Previous designs utilized a target wall to affect the transition. An angled transition section is disclosed herein that substantially eliminates the target wall and/or the reverse target and provides a corresponding improvement in steam generator efficiency.
Claims20
Fired equipment comprising:
- a radiant section having a circular cross-section;
- a convection section having a rectangular cross-section, the convection section configured to absorb thermal energy via radiation from a burner flame extending into the radiant section and via convection from combustion gases flowing from the radiant section and through the fired equipment, the convection section reducing in interior cross-sectional area in a downstream direction of the combustion gases flowing through the fired equipment;
- and
- a transition section axially aligned with the radiant section and the convection section and connecting the radiant section to the convection section without a target wall.
A steam generator comprising:
- a furnace having a circular cross-section;
- a convection section having a rectangular cross-section, the convection section configured to absorb thermal energy via radiation from a burner flame extending into the furnace and via convection from combustion gases flowing from the furnace and through the steam generator, the convection section reducing in interior cross-sectional area in a downstream direction of the combustion gases flowing through the steam generator;
- and
- a transition section oriented between and axially aligned with the furnace, the transition section connecting the furnace to the convection section without a target wall.
Dependencies are inferred from the claim text.