Rotary burner control
OwnerDonald W. Larceninventor
Life of this patent
Estimating the term…
Abstract
A system and method for controlling a rotary burner of the type in which attempts have been made to maintain predetermined differential pressures between steam and fuel delivered thereto. The fuel flow is adjusted to provide a given heat release; and without regard to pressure, the steam flow is adjusted in accordance with a predetermined ratio to correspond to the given fuel flow.
Claims15
A method of operating a rotary burner of the type in which quantities of fuel and steam are controlled by respective steam-flow and fuel-flow control valves to deliver steam and fuel into an air stream through a rotating member, said method comprising the steps of:
- determining the amount of fuel flow that is required thru said burner to produce various values of heat release;
- adjusting a ratio-control device to provide an output signal level to said steam-flow control valve corresponding to a desired steam flow for each given fuel flow in a series of fuel flows;
- setting said fuel-flow control valve to provide a flow of fuel corresponding to a desired heat release value;
- and
- regulating said steam flow in accordance with the previously adjusted output signal level from said ratio-control device corresponding to said desired heat release value.
A flow control mechanism in a rotary burner device comprising means for delivering fuel to said burner;
- an adjustable fuel-flow valve for regulating the flow of fuel to said burner;
- fuel-flow control means for adjusting the position of said fuel-flow valve;
- means for delivering steam to said burner;
- an adjustable steam-flow valve for regulating the flow of steam to said burner;
- steam-flow control means for adjusting the position of said steam-flow valve;
- and,
- selectively settable ratio control means for providing an output signal to said steam-flow control means, there being a predetermined ratio of steam flow to fuel flow for any desired fuel flow within a given range of fuel flows, so that adjustment of said fuel-flow valve by said fuel-flow control means to deliver a desired amount of fuel to said burner, results in a corresponding steam flow to said burner in accordance with the predetermined ratio for the desired fuel flow.
A flow control mechanism for a rotary burner including:
- a rotating member having perforated arms for directing a mixture of steam and fuel therefrom to cause said rotating member to rotate;
- a fan member rotatable in response to rotation of said rotating member to cause air to mix with said steam and fuel mixture and project said steam and fuel into a flame zone;
- fuel delivering means for delivering fuel to said rotating member;
- steam delivering means for delivering steam to said rotating member;
- a venturi in said steam delivering means;
- connecting means at said venturi for connecting said venturi to said fuel delivering means;
- said venturi thereby being operative to cause said fuel to mix with said steam;
- an adjustable fuel-flow valve for regulating the flow of fuel in said fuel delivering means;
- fuel-flow control means for adjusting the position of said fuel-flow valve;
- an adjustable steam-flow valve for regulating the flow of steam in said steam delivering means;
- steam-flow control means for adjusting the position of said steam-flow valve;
- and,
- selectively settable ratio control means for providing an output signal to said steam-flow control means, there being a predetermined ratio of steam flow to fuel flow for any desired fuel flow within a given range of fuel flows, so that adjustment of said fuel-flow valve by said fuel-flow control means to deliver a desired amount of fuel to said burner, results in a corresponding steam flow to said burner in accordance with the predetermined ratio for the desired fuel flow, whereby variations in pressure at said venturi during operation at a given setting of said fuel-flow valve do not detrimentally affect the desired steam and fuel mixture that is projected into said flame zone.
Dependencies are inferred from the claim text.