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Ladan
Wood gasification boiler
Instruction for use, installation and assembly of
boiler.
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General description:
We are introducing you the ecological wood gasification boiler of the output 18, 25, 40, 60,
80kW. The hot-water boiler is designed for heating of apartment, family house, guest house,
smaller industrial workshop and similar object. The boiler is designed for burning of wood only.
Any dry wood can be used for burning, mainly logs till 550-1000 mm length. Also wood of higher
humidity can be used but then the nominal output is reduced and burning time prolonged. Due to
its large feed hopper you can avoid the most demandable operation of preparation and cutting the
wood into smaller pieces. It’s recommended to feed fire with logs of approx. diameter 10-15 cm.
The ashes is only 1-2 % from amount of used wood (cleaning approx. once a week maximum) In
consideration of very low level harmfull pollutants production the operation of wood gasification
boiler is very ecological.
Wood gasification boilers are well-tested and easy to use. The boiler is produced from the special
boiler sheet steel of thickness – 6 mm inner part and 4mm outer part. Fireproof shaped pieces
inside the boiler are made from a special heatproof material, so the pieces are highly heat resistant,
high strength and provide long service life. The body of the boiler is made as weldment of steel
plates. It includes a feed hopper with a heatproof shaped piece that has an oblong opening (nozzle)
for transit of flue gas. Under the nozzle there is a combustion space formed with the ceramic
shaped pieces. In the rear part of the boiler there are vertical flue tubes which in the upper part go
to the collecting channel with a make fire flap. Rear part of the collecting channel is fitted with an
eduction pipe for connecting to the chimney. In the front of boiler is situated a blowing ventilator
with regulation flap for air inlet. The boiler body is insulated by mineral wool Nobasil of
thickness 20mm which is located between the body and jacketing.
Primary and secondary air is preheated and in optimal ratio distributed into the combustion
chamber and nozzle.
Wood gasification boilers are completely different from the current solid fuel boilers. The priciple
of burning is based on the gasification at high temperature (approx. 1100 °C).
Wood burning gas is supported by a blowing ventilator which blows primary air into the
combustion chamber and secondary air injection into the nozzle. This combustion system is very
economical while saving approx. 40% of fuel. Boiler operation requires the minimum attendance
due to automatic operation of the boiler. Hopper contents is sufficient for about 8 to 12 hours
operation at medium power. At minimum output level the boiler is operational even up to 24
hours. All this provides the digital microprocessor control measures.
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Technical parameters:
Type of boiler
LADAN
18
25
40
60
80
Boiler output
kW
18
25
40 60 80
Feed hopper capacity
dm3
75
113
180
250
360
Door dimension /h-w/
mm
270x450
270x450
270x450
370x570,
270x570
370x570,
270x570
Prescribed chimney draught
Pa
10
23
23
28
32
Test overpreassure
bar 4 4
4
4
4
Max. working overpressure
bar 2 2
2
2
2
Boiler weight
kg
360
430
465
620
735
Diameter of flue connection
mm
160
160
178
178
178
Boiler height
mm
1280
1280
1490
1490
1490
Boiler width
mm
595
595
595
715
715
Boiler depth
mm
855
1055
1055
1380
1626
Shielding of electric parts
IP
21
21
21
21
21
Electrical input
W
70
70
70
140
140
Hydraulic loss of boiler at 10k
mbar
0,21
0,31
0,54
0,84
1,12
CO emission class
4 4
4
4
4
Boiler efficiency
%
90
Temp. of flue gas in
nominal output
°C
148
146
144
162
168
Flow of flue gas
kg/s
0,018
0,02
0,035
0,054
0,072
Maximum noise level
dB
57
57
57
57
57
Specified fuel
wood
Water content max.
20%
Average fuel consumption
kg/h
5,5
7,6
9,5
11,8
14,6
Recommended fuel size
mm
150
150
150
150
150
Max. length of logs
mm
350
550
550
800
1000
Water volume in boiler
l
55
75
93
113
132
Voltage
V/Hz
230/50
230/50
230/50
230/50
230/50
Range of temperature
of heating
°C
60 - 90
60 - 90
60 - 90
60-90
60-90
Min. water temperature in service
°C
60
60
60
60
60
Operation temperature of water
°C
80 - 90
80 - 90
80 - 90
80-90
80-90
Safety valve Danfoss BVTS
• temperature of inlet water
• pressure of inlet water
• opening temperature
°C
Bar
°C
Max. 15
2
95
4
Protection of Boiler against overheating.
ATTENTION: According to the EN 303-5 standard the Safety cooling circuit against the boiler
overheating must not be used for other purposes than to protect boiler against overheating.
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1. Drain valve Danfoss - BVTS, ¾“
2. Submersible case with temperature-sensitive element
3. Safety cooling heat exchanger
4. Drain to sump
5. Boiler
6. Inlet of cold water
Valve Danfoss – BVTS is on the outlet of the cooling circuit of which sensor is placed at the side
part of a boiler and protects the boiler against overheating. When boiler water temperature
increases above 95°C, cooling circuit is filled up with tap water that takes the extra heat away. In
case of boiler overheating and opening of Danfoss – BVTS valve there must be secured the
permanent drain of heated water from the boiler cooling circuit into spillway.
Valve at the cold water inlet into the boiler cooling circuit must be permanently open and the
boiler cooling circuit must be connected to the functioning distribution of cold water (e.g. cold tap
water network) of temperature 10-15°C and operating overpressure 2-6 bar.
In case of thermostatic valve Danfoss – BVTS opening the circulation of cooling water through
the cooling circuit is not guaranteed it is a risk of boiler damage ! In such case the boiler
warranty is invalid.
Valve DANFOSS is not a part of a boiler!!!
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