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The combustion of fuel for power generation or even home heating
presents different problems depending on the objective and the type
of fuel: vegetable oil,
biofuels, and
of consideration here, syngas also known as wood-gas or town-gas.
The analysis of the fuel burner for syngas is particularly
necessarily because of the ease with which it is produced but also
because of the prospective applicability of the combustion burner of
the
combustibles produced
biogas during the fermentative utilization of domestic edible
waste, which has every component of syngas but carbon monoxide.
Moreover, the combustion of
syngas, often used for the chemicals, for supporting
distributed power generation systems such as by utility
corporations is just as efficacious for
alleviating the potential impacts of global warming, provided
the wood for generating the syngas is from young trees.
Effectively, the primary
equipment for the wood-gas biofuel Burner consists of three
integrated components in consistence with the general
base technology
for combustion:
- Fuel Combustion Burner
- Combustion Chamber
- Fuel Burner Supply System
which are interfaced with
secondary accessorial equipment, an Fuel Delivery System,
consisting of Fuel Tank, a gas-compression pump that pumps the
syngas into the
fuel combustion burner. The pump should also
be fitted with real-time control to activate pumping only upon
actuation.
The Fuel Combustion Burner
necessarily is a use-specific customized variant of the base
technology fuel combustion burner. The salient
customizations is that the fuel handling should address gas instead
of liquid. For this reason the otherwise liquid atomizer inlet tube
is now fitted with a nozzle that allows fluid to only flow
only in the direction to the atomizer, only when the gas-compressor
is pumping gas towards the burner, and only when the pressure
reaches a particular value. Under this state the atomizer simply
becomes a gas-jet pin-hole discharge device.
Further, distance "h" from
discharge pin-hole of the atomizer to the end of the burner cylinder
chassis is now determined on the basis of flame propagation
calculations. The Fuel-Air Mixing
Zone, FAMZ, is therefore of a length necessary to support intense
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fuel-air mixing as to support
flammability conditions, such that upon ignition, the flames gets
propagated to just the outside of the cylinder chassis - the
situation in which the flames is now in the combustion chamber and
still continues to burn. The fuel inlet to the atomizer is a tube which
can be connected to the Fuel Burner Supply System for delivery
of fuel.
On the basis of the stated
requirement of ensuring flame sustained burning outside of the
burner chassis, fuel igniter, flow-sensor, and temperature sensor,
embedded within the FAMZ is the maximum range of propagation without
extinction from the point of ignition to the chassis outlet-tip. Obviously, the
higher the velocity of the gas flow through the chassis
the longer the length of the FAMZ, also dependent on air-mixture
ratios. Effectively, then the size of the discharge
opening of the fuel atomizer-tip is of critical design and likely
directly impacts the efficiency of a design of Fuel Combustion
Burner.
The Combustion Chamber for a
syngas burner is also very different in this case: The chamber is
effectively part of a gas turbine, that is fitted with modules of
the Combustion Burner circularly arranged inlet ports through which
syngas is fed into combustion section of the turbine. The outlet
stream of hot gases can be fed into a compressive flow device to
enhance the velocity of discharge for instance.
The
delivery of fuel and air to the Fuel Combustion Burner is
accomplished with Fuel Burner Supply System. As per design of the
base technology specification, the delivery system consists of two
tubes and present for use
two fluid outlets, one that is providing syngas and the other that
provides air supply. The two outlets: fuel outlet port, and air-outlet port
readily interface with the fuel and air inlet ports of the
Combustion Burner. Effectively the Fuel Burner
Supply System connects the Fuel Combustion Burner to the fuel reservoir(s), and delivers fuel in pulses or continuously
as the application design specification may stipulate.
The igniter, flow sensor and
temperature sensor electronics may be preferentially centralized on
a single electric circuit mother-board. This choice entails the
development of embedded system software and associated enclosure
packaging. |
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