Heater Convection Section

It often contains rows of extended surface tubes to improve the efficiency of the furnace.

Heater convection section. Finned tubes 1 3 mm thick strip 200turn meter are difficult to clean when compared to studded 12 7 mm dia. Per api 560 the convection section must be designed to allow for two future rows of tubes. These currents circulate throughout the body of the appliance and across its heating element.

Finned tubes on the convection section further enhance heat transfer. Boiler convection section the part of a furnace between the radiant section and the stack. Convection section the convection section is located above the radiant section where it is cooler to recover additional heat.

The area is filled with tubes or pipes which carry process steam and which absorb heat via convection heat transfer from the hot gases passing through the area on their way out of the stack. Lanes for soot blowing steam lancing or water washing and these lanes must consider the future row requirement. Our cetek hot convection cleaning process removes convection section tube fouling scale during furnace operation.

In order to recover additional heat a convection section is located in the cooler area above the radiant section. Convection section portion of the heater in which the heat is transferred to the tubes primarily by convection crossover inter connecting piping between any two heater coil sections breeching heater section where flue gases are collected after the last convection coil for transmission to the stack or the outlet ductwork. Finned studded tubes are often used in convection coils due to lower flue gas temperatures.

The convection section must be designed with corbels to minimize flue gas bypassing. Bank of coils which receive the heat from hot flue gases mainly by convection. The convection section is located in the cooler flue gas stream.