Tecnologia del Quemador
Varia caracteristicas patentables han sido incluidas en
el diseño del quemador de aceites usados INOV8 para
tratar con la precipitacion de carbon y problemas de gases,de
la siguiente manera:
- Un sistema de recirculacion es proporcionado para mantener
altos niveles de transferencia de calor(velocidades en
mas de tres pies por segundo) al calentar el aceite para
si prevenir la ocurrencia de precipitacion de grafito.
- El sistema de recirculacion se ventea automaticamente
permitiendo la salida de gases y mantiene el flujo constante
de aceite al inyector.
- El sistema de recirculacion en combinacion con el eliminador
automatico de vapor proporciona una caracteristica unica
que es que la bomba del aceite llega a autocebarce. De
hecho, la carga de la recirculacion causa que la bomba
del quemador se convierta en una aspiradora con capacidad
de baja presion. La mayoria de codigos requeieren
que se coloque el horno(unidad calefactora) a ocho pies
del piso.
- With all competitive units, it is necessary to use either
a remote floor mounted pump or involve rigorous priming.
The self-contained oil pump on the burner housing is adequate
for most applications.
- A filter is included in the recirculation loop immediately
after the heater circuitry to entrap any small particles
before the oil enters the passage leading to the nozzle.
Competitive units do not have such a practical method
to filter all oil between the heating system and the fine
aperture oil nozzle. The general solution has been to
sacrifice good atomization by using a large aperture nozzle.
- The recirculation loop system pumps hot oil so that
viscosity variations are minimized to maintain uniform
firing rates over wide oil conditions.
- The recirculation system uses a built-in relief valve
of the pump to a desirable advantage. The flow rate through
the valve is ten times greater than what is encountered
in the firing rate of the burner making pressure regulation
much more manageable.
- A pneumatic/mechanical device moves a needle through
the combustion gun to the aperture of the oil nozzle.
This needle will prevent nozzle drip at shut down, will
maintain an open orifice for consistent firing, and will
ignite immediately since oil does not drain out of the
final delivery circuit.
 The
fact that other manufacturers of waste oil furnaces use the
less expensive residential combustion controller is not justification
for its use here, particularly when personnel and/or property
would be placed in peril. There have been many cases where
buildings have been destroyed by fire initiated by explosions
of waste oil furnaces. The design of this waste oil furnace
includes a number of innovative concepts directed specifically
to safety and reliability, and yet, this manufacturer is convinced
that a more sophisticated primary combustion control is absolutely
necessary.
The INOV8 burner uses an industrial rated primary safety
control at a cost ten times greater than the aforementioned
residential control. It is an industrially rated control
qualified to monitor combustion equipment as large as 2.5
million BTUH. The primary safety control features the following
programmed sequence:
- An oil temperature interlock to prevent firing of cold
oil.
- An air pressure interlock to prevent oil delivery without
proof of atomizing air.
- A 90 second purge to insure venting of explosive vapors
prior to each start sequence insures there is no residual
fire before introducing new oil
- Start mode consists of a ten second trial-for-ignition
period.
- Automatic sequence from start-mode to run-mode upon flame
detection.
- A three second timing to terminate oil delivery if a
flame outage occurs during run mode.
- One attempt to re-establish flame, but only then, after
repeating steps 1, 2, 3 and 4 above.
- If flame is not detected within the ten second trial-for-ignition
period, the unit reverts to a full safety shutdown wherein
power is terminated to the combustion motor (oil pump) and
the oil heater. After safety shutdown occurs as indicated
by a red light, manual reset is required.
- Termination of spark ignition after flame established
to lengthen the life of the ignition transformer and the
electrodes.
The primary safety control uses an ultra-violet flame detector.
The ultra-violet detector is not sensitive to daylight or artificial
light, as is the case with the cadmium cell detector, previously mentioned.
The ultra-violet sensor will "see" and respond to the flicker of a match or
candle at a distance of four feet, but will not "see" a strong artificial light
at any distance. This feature alone will prevent dangerous situations from
occurring. One of the more appealing aspects of the burner is the serviceability.
The heart of the burner is the "Slide-Out Fire Control Module". It is designed for
ease of servicing and should it need replacing a new Module can be replaced within
five minutes. This Module includes all of the operating controls; temperature sensors,
electric pre-heater and the needle actuator, which could be subject to field failure.
Replacing of this unit would not require highly qualified technicians.
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