Direct Fired Heaters

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• Publié par: seorumer
• Publié le: 19 janvier 2017
• Nombre de lectures: 4
• Langue: English

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Direct Fired Heaters
Sigma Thermal offers convection style, API560, and non-API radiant convective heaters
from 1MM to 80MM Btu/hr.

A direct fired heater is a style of heater in which a burner provides hot gasses that transfer
their heat energy to a process liquid or gas flowing directly through coils installed inside the
heater vessel. Direct fired heaters can utilize radiant and/or convection heat transfer
sections, and can be configured in many different ways depending on the customers’
specific requirements. Due to the flexibility in design, virtually any style of furnace burner
can be used in single or multi-burner configurations. For help selecting the right solution for
your project, contact our application engineers today.

Convection Heater

A convection style heater offers the benefits of a direct fired heater, while eliminating some
of the drawbacks associated with radiant heat transfer. Radiant heat transfer can be
undesirable in certain temperature sensitive applications as radiant heat transfer tends to be
more intense and unevenly distributed around the coil surface. Sigma Thermal’s convection
style direct fired heater utilizes a separate combustion chamber and flue gas recirculation to
reduce combustion chamber temperatures to 1,400F, thereby minimizing the impact of
radiant heat transfer to the process coil.

Radiant –Convective Heater

A radiant–convective style heater is the most well-known and commonly used style of direct
fired heater. These heaters utilize a bare tube radiant zone in combination with a bare /
finned convection section. Vertical cylindrical, A-frame, and cabin style are the most common configurations. Sigma Thermal offers all types of radiant–convective heater
designs including API 560 compliant systems.


This was originally published to www.sigmathermal.com. Please check out our site by going
here: Sigma Thermal