Gasifying boiler Vigas
1. TECHNICAL ESCRIPTION
VIGAS thermal boilers are designed for the combustion of dry wood materials, using sawdust to wood logs
according to the dimensions of the gasification chamber, with a maximum diameter of 20 cm. Sawdust,
woodchips, splinters and cuttings must be burned in conjunction with wood logs. Thermal boiler VIGAS 29
UD is designed to burn brown coal. It is possible to use dry wooden material as a substitute fuel.
Boilers are welded from – 6 mm steel sheets. Inner boiler sheets, which are in contact with boiler waste
gases, are 6 mm thick, others are made of mm steel.
The heat exchanger is welded from steel pipes, 57x ,5 mm. Exterior boiler panels are made of 0,8 mm
sheet. Thermal insulation of the boiler is made of insulation material, NOBASIL 20 and 50 mm thickness.
Combustion gases pass through the steel boiler neck to the chimney.
The boiler space consists of a combustion chamber, where fuel is dried and gasified. Then accrued gases
pass through the fireproof concrete nozzle or a cast iron nozzle into the combustion chamber, where it
burns with the help of secondary air. Flue gases are intensively cooled in the exchanger. The boiler has
a light up damper controlled by a lever at the front of the boiler.
In order that the boiler complies with the requirements for non-demanding operations, it is equipped with an
AK 000 control located on the top panel of the boiler. The design of the system allows very effective
combustion of various kinds of fuel. The AK 000 Control with graphical display in basic configuration offers
the following:
controlled temperature of heated water ranging from 70 - 85°C (up to 90°C with accu. tank)
continuous and automatic control of the fan according to required output and type of fuel
connnection to and control of discharge fan
connection to and control of circulation pump
connection to the gases thermometer
connection to room thermostat (room temperature regulator is voltage free )
connection to extended regulation (Expander AK 000) via BH BUS
connection to module AK 000M data back-up, followed by PC evaluation
graphical schematic indicating hydraulic boiler connection as requested
real time set
Configuration VIGAS
Lambda Control
offers :
control of the servo flap of primary and secondary air, based on data received from the lambda
sensor oxygen level reading.
during a power cut, AA batteries will close the servo-operated flap and this prevents draught from
the chimney burning up the fuel.
The boilers are equipped with a STB thermal fuse, which disconnects the boiler fan if overheating occurs
(above 100°C). A safety mechanism to prevent the boiler from overheating is a requirement of the STN EN
303-5: 2012 standard. It is recommended to install a safety valve TS 131 ¾“ in the exchanger to avoid
overheating.