The VULCAN 70 AIR type automatic 70 kW capacity hot air combustion equipment, developed and manufactured by MBH Hungarian Biomass Recycling Co. had been developed specifically by taking into account the needs of users with medium output requirement (between 30-70 kW) operating agricultural plastic tunnels and halls with larger air space.
The boiler is equipped with a self-developed, so-called “sluice” burner that has automatic cleaning function; thanks to this feature it is excellent also for incinerating pellets with higher ash content. Thanks to the two horizontally moving burner grates positioned above each other the equipment is able to remove the ash/bottom ash from the grate during operation thus continuously providing the best conditions for combustion. It is possible to select 4 different pellet qualities to provide the highest comfort grade and autonomy.
The equipment has an integrated heat exchanger cleaner which significantly contributes to continuously maintaining high efficiency and comfortable maintenance.
There is a large ash-box under the combustion chamber for storing the ash/bottom ash produced therefore no frequent emptying is required.
The automatic device of the boiler adjusts the burner in 5 output stages from ignition to stopping. Thanks to this feature the equipment always operates at the required output. The control provides both automatic (that can even be controlled by room thermostat) and manual mode; in automatic mode the equipment modifies output by maintaining the set forward air temperature (at 50-70 °C) while in manual mode the boiler is operating at the set output level.
The boiler directly produces hot air which is blown off by a fan from the heat exchanger of the equipment; air duct can be connected to the outlet stub thus the hot air can be distributed according to the requirements. As there is no heat transfer medium (water) in the equipment there is no need to install radiators and pipelines; in addition there is no risk of freezing so the combustion equipment can be used in the winter in intermittent operation.
The pellet container integrated into the equipment can hold fuel sufficient for 4-5 hours of operation thus it must be refilled from an external container as necessary.
Room thermostat can be connected to the equipment. Using it the equipment can be operated with time and temperature programs.
Technical parameters of the boiler:
• nominal capacity: 70 kW
• minimum capacity: 30 kW
• maximum temperature that can be set: 70 °C
• maximum permitted operating pressure: 2.5 bar
• efficiency: >91%
• pellet consumption at maximum load: 15.4 kg/h
• pellet consumption at minimum load: 6.6 kg/h
• flue pipe diameter: 110 mm
• height: 2,148 mm
• width: 1,272 mm
• depth: 1,240 mm
VULCAN 70 AIR schematic drawing