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Introduction
Limpsfield Combustion is an industrial burner manufacturer,
offering complete solutions to combustion requirements from standard burners
to individually engineered solutions. Experienced in all common aspects and many
more specialised areas of its field, Limpsfield offers experience, quality and
competitive prices.
Limpsfield Burners are of an Industrial Forced Draft design,
suitable for alternative or simultaneous firing of all types of gaseous fuels
and mineral fuel oils.
Limpsfield Combustion offers burners for a range of
application inputs from 1 - 100 MMBtu/hr .
Burner Features and Application Benefits
Designed and manufactured to exacting specifications, the
Limpsfield burner line is an exceptional combination of form and function. Every
feature, from the powder coated finish to the sealed damper bearings and large
viewing port, exemplifies the commitment to quality and performance. With the
ability to orient both the fuel and air inlets independently of one another the
application possibilities are virtually unlimited.
The Limpsfield burner range has also been designed with the
service engineer in mind. All of the components can be removed or adjusted with
only a few simple hand tools and without removing the burner from its mounting.
In addition to being easy to set up and adjust, the unique
forced draft combustion design distributes the combustion air in the burner head
so that the necessary static pressure is maintained for stable combustion and
flame geometry, throughout the complete burner firing range.
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Standard Features
As standard, burners have the following features:
 | Flame viewing port located at the rear of the burner,
enabling a unique view of the combustion process. |
| Fuel input fixings on either side of the burner,
allowing flexibility for site conditions. |
| Fitted terminal box from which a 32 way socket
connects the burner to a control unit, allowing it to be disconnected
and isolated when required. |
| Stainless steel diffusers and blast tubes. |
| Damper to control air input mounted using sealed
bearings for improved control and reliability. |
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Combustion Air Control
Combustion air is delivered via a remote or directly
mounted medium volume high pressure fan. The fan has a direct coupled,
backward curved impeller, and can be supplied with a flange mounted
silencer.
The air damper blades are operated using fully enclosed
bearing assemblies, this allows hysterisis free operation with infinite
repeatability.
The rear section of the burner can be rotated to allow
fans to be mounted in a variety of positions, overcoming site constraints.
To ensure optimum performance of the burner, each
combustion air fan is selected to match the specific requirements of the
application and the job conditions. |
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Oil Control
Oil control on the burner is hydraulically operated to
ensure absolutely no after burn, this is achieved using a piston
controlled shut-off valve closing directly on the oil nozzle outlet. The
hydraulic circuit is operated on a 25 bar supply pressure. Nozzles are
made of high-alloyed steel to ensure the best possible burn out behaviour
for variable oil quality. The amount of oil supplied to the nozzle is
controlled by a spillback type oil valve on the nozzles return line.
Limpsfield Combustion also manufacture and supply oil
pump and filtration control sets, with or without H.F.O. (No.6 Oil)
pre-heaters. |
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Gas Control
Gaseous fuel is injected at high velocity into the air
stream prior to the stainless steel mixing diffuser. The natural gas input
volume is controlled via a precision made flange butterfly valve enabling
one positioning motor to be used for both fuels. A completely linkageless
procedure.
Limpsfield Combustion also manufacture Gas Control
Trains. These are supplied complete with pilot control train, double block
control valves, regulators and isolation valves. Optional equipment
includes: gas filters, pressure proving equipment, high pressure shut-off
valves, gauges and switches. |
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Low NOx Capabilities / Flue Gas Re-circulation
All burners are capable of meeting tough US federal
codes regarding low NOx emissions. Numerous installations of this nature
have been made with excellent results.
Sub-30ppm NO emissions at 3% O2 can be attained. This is
due to the utilisation of flue gas re-circulation and the superior flame
retention and mixing achievable from the Limpsfield design. |
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Combustion Control
Limpsfield offers its users control panels to accompany
the burners. These are designed and built around advanced combustion
control equipment which will optimise reliability and performance of the
LC burner.
All panels are UL approved and built in an ISO9001
environment.
In addition, panel design and specification can be
tailored to the end user’s specific requirements. |
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Hydrogen Combustion
A unique spider head assembly offers the user high turn
down ratios whilst maintaining excellent mixing.
An example of Limpsfield's in-depth engineering
capabilities, the spider gas head shown on the right was specially
designed to be fired with either Propane or Hydrogen. This was for an
application where Hydrogen was produced on-site as a bi-product of a
chemical reaction.
The heads construction is such that the fuels are
supplied from two individual gas trains to separate gas control valves,
one on either side of the burner.
The diffuser view shows two different sizes of main
injector, these are used in order to accommodate the differences in the
flame velocity of hydrogen and propane. |
