FI-GS - Heating plant with gasification

The operating principle of the boiler on the grounds gasification

The operating principle of the boiler on the grounds gasification The wood (18-20% humidity) is loaded in the fuel storage where, in contact with the embers produced on the refractory surface, generates wood gas through the phenomenon called "wood distillation", that, combined with the primary (combustion) air, make up a gaseous mixture. This fuel is blown through the refractory nozzle into the combustion chamber where the combustion takes place as "turned-up flame"
The steps of the gasification process and of the wood gas combustion:

1. Wood drying - the wood vapors in the wood are eliminated, vapors that also contain natural resins.

2. Carbonization (pyrolisis) - wood gas is formed and the dry wood turns into coal through the process called ”distillation”.

3. Primary combustion - the combustion of the created fuel and heat transfer to the previous and subsequent level.

4. Main combustion - the fuel mixture is blown (transferred) through the refractory nozzle where it self-lights at 560 oC combined with the secondary air.

5. Total (final) combustion - the combustion of the wood gas takes place in the main combustion chamber combined with the secondary air at temperatures of 1200 °C

Next is the heat transfer to the main heat agent through the boiler exchanger and then the burned gases are exhausted through the flue.

FI-GS - Heating plant with gasification

General issues

- FI-GS are steel boilers operating on the grounds of the gasification principle, being endowed with air fan providing combustion air to the combustion chamber. The air introduced by the fan is directed on two air channels. The primary air (the upper channel) allows wood combustion from bottom to top (totally) while the wood gas passes through the refractory nozzle and the secondary air (the lower channel) helps burning the wood gas.

- the combustion of wood by the so-called "pyrolisis" enables the output up to 89% and ecological combustion with minimum amount of ash resulted; the used fuel must be dry wood (maximum humidity of 20%), logs of maximum diameter of 200 mm and 20%.wood scrap

- the boilers have two compartments separated by a refractory concrete plate equipped with combustion nozzle; the upper compartment is designed as fuel storage and gasification chamber and the lower one is the combustion chamber where wood gas actually burns; the main combustion chamber is designed so that the burnt gases cross the two connective ways for better heat transfer to the heat agent, then exhausted to the flue.

- The boilers are equipped with two heat exchangers: coil producing household hot water (in the range 18 – 40 KW), and cooling coil – protection against the overheating (all range of powers).

- - The standard pack also includes the air fan with the one way adjustment valve, thermo manometer, control thermostat adjusting the operating temperature in the boiler (by turning the fan on and off), a safety thermostat with manual resetting device, a thermostat of minimum (turns off the fan after the temperature fall in the boiler), a general switch, a wire fuse, safety valve, fire iron, scrapper and wire brush.



Benefits

- significant output of up to 89%;

- the ecological combustion and the large fuel storage confer significant autonomy (at low power, even up to 24 hours);

- the large fuel storage enable the loading and combustion of large size logs that do not have to be split;

- significant savings by using solid fuel;

- unlike other boilers on the market, due to the position of the feeding door which is lower than the upper part of the burning point, when feeding the smoke does not go out into the boiler room even if the stack does not have sufficient draught;

- low consumption of fuel due to the system operating on the gasification principle;

- due to the almost perfect combustion, you shall have a minimum amount of ash and residues that shall be removed only once a week;

- the easy detachment of the back part of the boiler enables quick access for efficient cleaning of the smoke routes;

- Controlled and automated operation enable the control of the combustion and of the ambient temperature;

- household hot water preparation changer (coil) immersed into the primary heat agent for the range of powers 18 - 40 KW. Household hot water is immediately supplied, in continuous flow, proportional to the boiler power (Covers the needs of a kitchen and of a bathroom at the same time). For larger consumption of household hot water and for the boilers of the range of powers 50 - 150 KW, for the preparation of the household hot water you can choose a boiler manufactured by Termofarc;

- safe operation regardless the conditions:
  - if there is a permanent source of water, you can choose the assembly variant with membrane (closed) expansion tank, cooling coil, heat valve and safety valve;
  - the use house water supply plant is subject to the mandatory assembly of an open expansion tank and safety valve;

- safety and comfort:
  - the automation elements of the control panel enable the boiler operation without the need to monitor it, by stopping the fan and, implicitly of the combustion (by the adjustment thermostat) when the set temperature is reached. The safety thermostat conditions the stop of the boiler when the temperature of 95°C, if the adjustment thermostat did not operate.
  - protection against overheating made up of a cooling changer (coil) totally immersed in the primary heart agent chamber and the heat valve allowing the boiler to cool down using the cold water from the network. This system is driven when the temperature of 95 - 98 °C is reached, by means of the heat valve with thermostat control. We must emphasize that this system also protects the boiler in case of accidental power failure.

- It can also be assembled into a gravitation installation (thermo siphoning) or with forced circulation.

Specifications

MODEL UM FI-GS 18 FI-GS 25 FI-GS 30 FI-GS 40 FI-GS 50 FI-GS 60
Useful heat power Kcal/h
Kw
25.500
18
22.000
25,6
26.000
30,1
35.000
40,6
45.000
52,2
52.000
60,3
Output % 87-89 87-89 87-89 87-89 87-89 87-89
Height mm 1615 1615 1615 1615 1625 1625
Total height on pallet mm 1815 1815 1815 1815 1825 1825
Width mm 605 605 605 605 710 710
Length mm 1045 1165 1225 1335 1400 1570
Volume of the fuel storage dm3 120 135 150 175 230 280
Content of water in the boiler L 118 139 149 164 209 243
Diameter of the stack connection mm Ø 170 Ø 170 Ø 170 Ø 170 Ø 200 Ø 200
Stack connection height mm 1365 1365 1365 1365 1440 1440
Necessary draught at the flue mbar 0,15 – 0,2 0,15 – 0,2 0,15 – 0,2 0,15 – 0,2 0,2 – 0,25 0,2 – 0,25
Consumed electrical power W 80 80 80 80 135 135
Feed tension / frequency V/Hz 220/50 220/50 220/50 220/50 220/50 220/50
Maximum operating pressure bar 2 2 2 2 2 2
Loading pressure bar 4 4 4 4 4 4
Turn / return connection inches 1” 1” 1” 1” 1” 1”
ACM coil connection inches ½" ½" ½" ½" - -
Cooling coil connection inches ¾" ¾" ¾" ¾" ¾" ¾"
Boiler emptying connection inches ½" ½" ½" ½" ½" ½"
Weight Kg 475 535 570 605 745 810
Burnt gases temperature   °C 130 - 140 130 - 140 130 - 140 130 - 140 130 - 140 130 - 140
Recommended operating temperature   °C 65 - 85 65 - 85 65 - 85 65 - 85 65 - 85 65 - 85
Maximum temperature of water in the boiler   °C 95 95 95 95 95 95
Household hot water flow, l/min 12 12 12 12 - -
Maximum amount of fuel per charge kg 27 38 43 48 73 89
Fuel consumption at the rated power
(dry wood with humidity of 18% - Hi = 3500kcal/kg)
kg/h 4,98 7,06 8,35 11,23 14,45 16,7
Wood maximum length/ diameter mm 350 / 200 450 / 200 500 / 200 600 / 200 650 / 200 800 / 200
Autonomy depending on the humidity and essence of the wood ore 8 – 12


MODEL UM FI-GS 80 FI-GS 105 FI-GS 130 FI-GS 150
Useful heat power Kcal/h
Kw
69.000
80
90.000
104,4
112.000
130,4
130.000
151
Output % 87-89 87-89 87-89 87-89
Height mm 1725 1725 1725 1725
Total height on pallet mm 1925 1925 1925 1925
Width mm 820 820 930 930
Length mm 1630 1870 1870 2020
Volume of the fuel storage dm3 400 510 570 655
Content of water in the boiler L 326 386 405 449
Diameter of the stack connection mm Ø 220 Ø 220 Ø 240 Ø 240
Stack connection height mm 1530 1530 1520 1520
Necessary draught at the flue mbar 0,2 – 0,25 0,2 – 0,25 0,2 – 0,25 0,2 – 0,25
Consumed electrical power W 240 240 400 400
Feed tension / frequency V/Hz 220/50 220/50 220/50 220/50
Maximum operating pressure bar 2 2 2 2
Loading pressure bar 4 4 4 4
Turn / return connection inches 1" 2" 2½" 2½"
ACM coil connection inches - - - -
Cooling coil connection inches ¾" ¾" ¾" ¾"
Boiler emptying connection inches ½" ½" ½" ½"
Weight Kg 995 1155 1265 1385
Burnt gases temperature   °C 130 - 140 130 - 140 130 - 140 130 - 140
Recommended operating temperature   °C 65 - 85 65 - 85 65 - 85 65 - 85
Maximum temperature of water in the boiler   °C 95 95 95 95
Household hot water flow, l/min - - - -
Maximum amount of fuel per charge kg 115 140 155 180
Fuel consumption at the rated power
(dry wood with humidity of 18% - Hi = 3500kcal/kg)
kg/h 22,15 28,9 36 42
Wood maximum length/ diameter mm 900 / 200 1100 / 200 1100 / 200 1250 / 200
Autonomy depending on the humidity and essence of the wood ore 8 – 12

Possible connection schemes

Open system

If there is no permanent water source (even if a house water supply plant is being used), the installation option shall mandatory be an open system with open expansion tank.
The open expansion tank shall be assembled at minimum 1.5 m above the last radiator.
The expansion tank is an open expansion tank according to I.S.C.I.R. standards as the solid fuel boilers do not have a prompt control of the combustion.
We recommend the use of the open expansion tank even if the system operates on the grounds of the thermo-siphoning principle.


Pressurised system

If there is a permanent source of water and the assembly of an open expansion tank is difficult/impossible, you can choose the option of a pressurized system with closed expansion tank, safety valve and mandatory with cooling system (coil protecting the boiler against overheating and safety thermal valve) connected to the water network.


To extend the life cycle of the boiler by avoiding condensation and for more efficient operation, we recommend a recirculation pump assembled between the turn and return which is controlled by a thermostat or a 3 way mixing valve;
For safe operation and increased autonomy, we recommend the assembly of an accumulation tank into the heating circuit.
To obtain household hot water (for the powers of more than 40 KW) we recommend the household hot water boiler manufactured by Termofarc.
To obtain the desired heat comfort and the control of the ambient temperature, we recommend that the heating circuit is controlled by an ambient thermostat.

Possible connection schemes
VEI – closed expansion tank
VED - open expansion tank
T - turn inlet
R - return inlet
ARR – network cold water
ARM – household cold water
ACM - household hot water
SS - safety valve
S - heat valve probe
RST – heat valve connection
ST – safety heat valve
Rt1, Rt2 - passing valves
Prc - anti-condensate recirculation pump
Pva - accumulator tank pump
Fy - impurities filter
Pb - ACM boiler pump
Pci - heating circuit pump
Cs1, Cs2, Cs3, Cs4 - direction valve
BACM - household hot water boiler
RI - radiator
VA - accumulation tank
RC - flue connection
GC - boiler emptying
VT - thermostat mixing valve
TA - ambient thermostat
TMM - thermomanometer