Coal gasification boilers

Lignite and Wood Gasification Boilers

C18S lignite gasification boiler

The boilers are constructed for burning wood and coal (lignite) on the principle of generator gasifying with the use of a gas exhaust ventilator, which withdraws the combustion gases from the boiler.

The boiler body is produced as a weldment of 3 - 8 mm steel sheets. The boiler consists of two chambers, one placed upon the other. The upper chamber makes up the fuel container, and the lower one, combustion chamber and ash collector. Between the two chambers, a new, rotating, patent protected grate is placed. The grate ensures perfect combustion of coal, wood, or a combination thereof, as well as simple cleaning.

Advantages of Lignite and Wood Gasification Boilers

  • Burning lignite and wood separately, we recommend together
  • Revolving furnace grate - easy for ash removal
  • Fan controlled - exhaust fan (S)
  • Simple handling and cleaning
  • Large fuel container
  • Revolving furnace grate - easy for ash removal
  • Simpler cleaning - (C25ST, C32ST, C50S - boilers with tube heat exchanger)
  • The secondary air is pre-heated to high temperatures
  • Small size and low weight
  • High quality
 
 

Nastavení roštovacích segmentů
The settings of the grate segments is displayed on the picture, and the same for use of coal or wood.

The secondary air supply channel and the flat part of gasifying grate must always point downwards.

PATENTS PROTECTED!

View of top feeding chamber
View of top feeding chamber

View of bottom feeding chamber
View of bottom feeding chamber

 

 
 

Exhaust vent
Exhaust vent
minimises smoke during feeding and operation of the boiler

Overheating protection cooling loop
Overheating protection cooling loop

 

Instalation and boiler regulation

 

Installation

ATMOS boilers must be connected via the LADDOMAT 22 or thermoregulation valve to achieve and keeping the minimum temperature of water returning to boiler at 65°C. The temperature of water exiting the boiler must be permanently kept between 80 - 90°C. The default configuration of all boilers includes a cooling circuit to prevent overheating. We recommend installing boilers with accumulation tanks.

Boiler regulation

Electrical - mechanical - Power is controlled with a safety valve operated with the draught regulator, FR 124 type, which automatically opens or closes the safety valve according to a set output temperature of water (80 - 90°C). When setting the power regulator, much attention should be paid because the regulator has another important function other than power regulation - it also secures the boiler against overheating. A controlling thermostat located on the boiler panel regulates the fan according to a set temperature (75 - 85°C). A temperature lower by 5°C should be set on the controlling thermostat rather than on the FR 124 draught regulator. Boiler use: C15S, C18S, C25ST, C32ST, C40S, C50S.

Each boiler can be fitted with ATMOS ACD 01 equithermal controller. It takes a control of the heating system based on datas collected from external sensors and on time. It can control suction fan of the boiler as well.

 

Panel with standard regulation

Panel with standard regulation

Panel composition:
Main off switch, safety thermostat, thermometer, regulator thermostat and combustion thermostat

Electro-mechanical regulation is an optimum solution for easy management of the operation of the boiler (ventilator).
The design of the panel with standard regulation is a basic design for all produced boilers.

Each boiler can be equipped at the customer's location with ATMOS ACD 01 electronic regulation for management of the entire heating system, depending on the outside and room temperatures. This regulation can also be managed by the boiler itself with a ventilator with many other functions.

 

Size of feeding chamber
Size of feeding chamber

burning of flame
burning of flame
in the bottom combustion chamber in spherical space

 

Lignite gasification boilers

 

 

 

ATMOS Combi
ATMOS Combi
C 18 S, AC 25 S
ATMOS Combi
ATMOS Combi
C 20 S, C 30 S, C 40 S, C 50 S,
AC 35 S, AC 45 S
 

CxxS

 

CxxST

LEGEND OF THE BOILER DIAGRAM - C18S, C20S, C25ST, C30S, C32ST, C40S, C50S

1. Boiler drum 20. Switch with an indicator light
2. Filling door 21. Tube heat exchanger (C25ST, C32ST, C50S)
3. Ash pan door 22. HONEYWELL FR124 output regulator
4. Exhaust fan - (S) 23. Heatproof shaped piece – front cubicle
5. Fireproof and heat-resisting fitting - rear block 24. Fan control (boiler) thermostat
6. Control panel 25. Door filling - Sibral - thin (32 mm)
7. Safety thermostat 26. Door insulating cord - cord 18x18
8. Regulating safety valve 27. Combustion area screen - rear
9. Grate bar 28. Waste gas brake - along spherical space (C50S)
10. Fireproof and heat-resisting fitting - round space L + P 30. Waste gas thermostat
11. Furnace grate tube 31. Capacitor for exhast fan - 1μF
12. Fireproof and heat-resisting fitting - half-moon 32. Cooling loop protecting against overheating
13. Firing safety valve 33. Primary air regulation
14. Fireproof and heat-resisting fitting - rear face of round space 34. Secondary air regulation
15. Cleaning lid K the flue-gas duct neck
16. Grating lever L the boiler water outlet
17. Ignition valve pulling-rod M the boiler water inlet
18. Thermometer N filling valve pipe sleeve
19. Combustion area screen - front (frame shield) P sleeve for a sensor of the valve which regulates the cooling loop

 

  C15S C18S C20S C25ST C30S C32ST C40S C50S
A 1185 1185 1435 1435 1435 1435 1435 1435
B 658 758 758 758 858 858 958 1117
C 595 675* 675* 675* 675* 675* 675* 675*
D 874 874 1121 1121 1121 1121 1121 1115
E 150/152 150/152 150/152 150/152 150/152 150/152 150/152 150/152
F 65 65 65 65 65 65 65 78
G 210 210 210 210 210 210 210 210
H 933 933 1177 1177 1177 1177 1177 1177
CH 212 212 212 212 212 212 212 212
I 212 212 212 212 212 212 212 212
J 6/4" 6/4" 6/4" 6/4" 6/4" 6/4" 2" 2"

* boiler width is 555 mm after disassembling the side hoods

TECHNICAL DATA
BOILER TYPE Kombi
C15S C18S C20S C25ST C30S C32ST C40S C50S
Nominal output (kW) 16 20 25 25 32 32 40 48
Required chimney draught (Pa) 16 20 23 23 25 25 28 28
Boiler weight (kg) 273 295 351 379 395 415 434 492
Water volume (l) 37 45 64 68 70 74 77 95
Fuel container volume (dm3) 50 65 100 100 125 125 150 150
El. power consumption (W) 50 50 50 50 50 50 50 50
Operating voltage (V/Hz) 230/50
Required fuel (preffered) Lignite (brown coal) of walnut size with specific energy 17 - 20 MJ/kg-1
Spare fuel (firing up) Dry wood with specific energy 15 - 18 MJ/kg-1, diameter 70 - 90 mm,
12 - 20 % moisture level
Max. length of wood (mm) 250 330 330 330 430 430 530 530
Min. operating temperature of return water 65 °C
Efficiency within the power output interval 90,4 88,9 84,5 88,9 85 88,6 85,4 90,0
Boiler class 5 5 4 5 4 5 4 5
Energy efficiency class B C C C C C C B

 

 

Lignite briquettes gasification boilers

The boilers are constructed to burn lignite briquettes. On a base of gasification process with a exhaust fan (S) to suck waste gasses into the chimney.

The boiler body is produced as a weldment of 3 - 8 mm steel sheets. The boiler consists of two chambers, one placed upon the other. The upper chamber makes up the fuel container, and the lower one, combustion chamber and ash collector. Between the two chambers, a new, rotating, patent protected grate is placed. The grate ensures perfect combustion of coal, wood, or a combination thereof, as well as simple cleaning. The primary and secondary air are pre-heated to a very high temperature for achieveing high efficiency and good quality burning.

The recommneded fuel are lignite briquettes. As spare fuel, logs of wood (length 330 mm), brown and black coal of a larger size (NUT1) or  wooden briquettes can be used.

Advantages of Black coal boilers ATMOS AC25S, AC35S, AC45S

  • Burning coal and wood separately, we recommend together
  • Large fuel container
  • Simple handling and cleaning
  • Coolining loop protecting the boiler against overheating
  • Revolving furnace grate - easy for ash removal
  • The secondary air is pre-heated to high temperatures
  • Small size and low weight
  • Simpler cleaning - (AC35S - boiler with tube heat exchanger)
  • Fan controlled - exhaust (S)
  • Automatic switching off the boiler after burning down

Boiler Regulation

Electrical - mechanical - Power is controlled with a safety valve operated with the draught regulator, FR 124 type, which automatically opens or closes the safety valve according to a set output temperature of water (80 - 90°C). When setting the power regulator, much attention should be paid because the regulator has another important function other than power regulation - it also secures the boiler against overheating. A controlling thermostat located on the boiler panel regulates the fan according to a set temperature (80 - 85°C). A temperature lower by 5°C should be set on the controlling thermostat rather than on the FR 124 draught regulator. Boilers contain waste gas thermostat which serves to stop the suction fan when the boiler burns down. The boilers work for 70% without the fan on.

Each boiler can be fitted with ATMOS ACD 01 equithermal controller. It takes a control of the heating system based on datas collected from external sensors and on time. It can control suction fan of the boiler as well.

AC25S

Legend – AC25S, AC35S, AC45S

Dimensions AC25S AC35S AC45S
A 1185 1435 1435
B 758 758 858
C 675* 675* 675*
D 874 1121 1121
E 150/152 150/152 150/152
F 65 65 65
G 210 210 210
H 933 1177 1177
CH 212 212 212
I 212 212 212
J 6/4" 6/4" 6/4"

* boiler width is 555 mm after disassembling the side hoods

 

TECHNICAL SPECIFICATIONS
ATMOS KOMBI TYPE
  AC25S AC35S AC45S
Boiler output (black coal) kW 26 35 45
Weight of boiler kg 297 377 397
Volume of water in boiler l 45 68 70
Dumping hopper capacity dm3 65 100 125
Electrical input W 50 50 50
Electric network V/Hz 230/50 230/50 230/50
Specified fuel (preffered)   Lignite briquettes with heating capacity 19 - 23MJ.kg-1
Max. length of wood mm 330 330 430
Min. temperature of returned water °C 65 65 65
Efficiency % 86 87,6 85,2
Quality of combustion - CO mg/m3 <500 <500 <500
Boiler class - 5 4 4
Energy efficiency class   C C C