Introduction
The combustion chamber developed by Loesche GmbH is primarily fabricated from heat
resistant steels. Refractory lining material is only used in the area of
the burner muffle.
This combustion chamber type, introduced under the name LOMA heater
(Lochmantel-Feuerung) has been employed worldwide for decades in various thermal
processes and contributed to their optimum thermal design.
The LOMA heater is characterized by the following:
the steel combustion chamber has only minimal refractory lining in
the burner muffle, thereby reducing the retained heat. Long heat-up
and cool-down times are not required.
rapid thermal load variation increases the control of downstream processes.
emergency stop and normal start/stop sequences do not require the
installation of an emergency chimney.
due to the steel construction a distinctly reduces machine weight
is achieved when compared to combustion chambers which are completely
refractory lined.
Any preferred burner type from various suppliers can be used in conjunction with the combustion
chamber.
In the 40 years of use worldwide all conventional fuels such as
natural gas
industrial gas
blast furnace gas
light fuel oil
heavy fuel oil
crude oil
have been successfully used.
View into a LOMA-heater type LF 20
The decades long experience in the use of these combustion chambers with various
burner types and fuels in diverse applications puts Loesche GmbH in a position
to offer hot gas producer plants on a turnkey basis. Experience in process plant
design and presence of Loesche personnel on all constituents ensures
efficient support for erection, commissioning and maintenance.
The After Sales Service department guarantees that as far as necessary, new
developments are applied in existing installations.
The flue gas generated by the burner (5) flows through the burner muffle (4) and is
mixed, in the perforated jacket area, with the process air to be heated.
The process air (3) flowing in allows the perforated jacket (1) and the
protective jacket (2) to be cooled. The design of the combustion chamber
also enables a spiral flow cycle of the process air to be generated.
The spiral flow is also transferred to the flue gases from the burner muffle,
which brings about an intensive mixture of both gas flows. As a result, a
very even temperature profile is attained at the outlet of the hot gas generator.
The temperature limit of the hot gas is 500 °C for the standard design; for
higher temperatures of up to 800 °C an improved material is supplied.
The LOMA heaters are offered in a standardized range, with the thermal
outputs of 1.25 x 106 kJ/h to 145 x 106 kJ/h.
The flue gas generated by the burner (5) flows through the burner muffle (4) and is
mixed, in the perforated jacket area, with the process air to be heated.
