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Naval firing practice

Related Terms

INTERMITTENT FIRING

A method of firing by which fuel and air are introduced and burned in a furnace for a short period after which flow is stopped, this succession occurring in a sequence of frequent cycles.

FIRING RATE CONTROL

A pressure temperature or flow controller which controls the firing rate of a burner according to the deviation from pressure or temperature set point. The system may be arranged to operate the burner on-off, high-low or in proportion to load demand.

INTERMITTENT IGNITION

An igniter which burns during light off and while the main burner is firing and which is shut off with the main burner.

LOW FIRE START

The firing of a burner with controls in a low-fire position to provide safe operating condition during light off.

STAGED AIR

NOx reduction technique predominantly used for fuel oil firing. The fuel is injected into a fuel-rich primary zone. This stoichiometry helps to control the fuel Nox mechanism. When firing gas, staged air produces higher NOx emissions than staged fuel.

STEAM ATOMIZING OIL BURNER

A burner for firing oil which is atomized by steam. It may be of the inside or outside mixing type.

AIR-ATOMIZING OIL BURNER

A burner for firing oil in which the oil is atomized by compressed air which is forced into and through one or more streams of oil, breaking the oil into a fine spray.

FOUL

1. Having freedom of motion interfered with by collision or entanglement; entangled; the opposite of clear. For instance, a rope is foul when it does not run straight or smoothly, and an anchor is foul when it is caught on an obstruction. 2. A breach of racing rules. 3. An area of water treacherous to navigation due to many shallow obstructions such as reefs, sandbars, or many rocks, etc. 4. Foul the range: To block another vessel from firing her guns at a target.

UNDERFEED STOKER

A coal firing system that introduces the coal under the fire.

BOILER CONTROLS

Either manual or automatic devices which maintain desired boiler operating conditions with respect to variables such as feedwater flow, firing rate, and steam temperature.
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