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The part of a furnace between the radiant section and the stack. 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. The convection section forms an obstacle to the combustion gas flow and can greatly affect furnace draft in the radiant section of the furnace.

Related Terms

RESTRICTOR

A device for producing a deliberate pressure drop or resistance in a line by reducing the cross-sectional flow area.

BUBBLE POINT

The differential gas pressure at which the first steady stream of gas bubbles is emitted from a wetted filter element under specified test conditions.

FILTER ELEMENT

The porous device that performs the actual process of filtration. Also known as Cartridge

HYDROFINISHING

A process for treating raw extracted base stocks with hydrogen to saturate them for improved stability.

ARC

A flash, caused by an electric current ionizing a gas or vapor.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

ACID ATTACK

Caused by an incomplete flushing after an acid cleaning process of boilers or similar equipment.

ABSORPTION

The assimilation of one material into another; in petroleum refining, the use of an absorptive liquid to selectively remove components from a process stream.

CRACKING

The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.

ADIABATIC PROCESS

A thermo-dynamic process in which no heat is extracted from or added to the system of the process.
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