Fire Tube Boilers

Fire Tube Boilers

Capacity range : 1 to 38 t/h
Designed using the latest thermal and technological principles, the OPTI boiler offers unique performance characteristics that comply with the most recent and stringent environmental requirements.
The OPTI fire-tube boilers are of the 3-pass wetback design, suitable for back-pressure combustion of oil and/or gas or biogas. Available in four design pressure ratings up to 18 bar(g). However, design pressures up to 36 bar(g) are also possible.
The OPTI boiler is available in single and twin furnace designs. Compliant with the Australian regulations, single furnace oil-fired boilers up to 18 t/h and gasfired boilers up to 25 t/h are possible. Capacities above these boiler ratings are available in twin furnace version, up to 38 t/h.
The furnace is generously sized, thus featuring low furnace loads and temperatures in order to achieve optimal combustion characteristics and minimize NOx emissions. The large steam chest ensures a steady and controlled steam generation, with a guaranteed steam dryness of over 99%. The unique insulation principles applied minimise to achieve optimal gross thermal efficiency.

The OPTI design features the following benefits:

  • High total efficiency and performance.
  • Outstanding insulation principles.
  • Low furnace load and temperatures.
  • Low flue gas resistance.
  • Large steam chest.
  • Easy access to smoke and water sides.
  • Sturdy construction.
  • Cladding and saddles without heat bridges.
  • Service platform insulated from boiler body.

Options and accessories:

  • Extra cover doors.
  • Extra insulated hatches and man hole covers.
  • Extended width of platforms.
  • Ladders, galleries, etc.
  • Valves and controls, automatic blow-down.
  • Burners, economisers, pumps, tanks.
  • Deaerators, water treatment.
  • Superheaters.
  • The OPTI boiler can also be configured in a ”Combination” version, with the addition of a separate flue gas waste heat section.

Fire Tube Boiler Diagram

OPTI No. 100 150 200 250 300 400 500 600 700 800 1000 1200 1400 1600 1800
Steam rating kg/h 1000 1500 2000 2500 3000 4000 5000 6000 7000 8000 10000 12000 14000 16000 18000
A mm 3300 3550 3600 3975 4225 4725 5425 5550 5600 5750 6315 6750 7050 7950 8050
B mm 1800 1950 2050 2150 2200 2375 2500 2600 2725 2775 3000 3050 3375 3425 3575
C mm 2300 2450 2550 2650 2700 2875 3000 3100 3225 3275 3500 3550 3875 3925 4075
D mm 2050 2200 2300 2400 2450 2625 2750 2850 2975 3025 3250 3300 3625 3675 3825
E mm 2150 2300 2400 2500 2550 2725 2850 2950 3075 3125 3350 3400 3725 3775 3925
F mm 1010 1085 1115 1160 1030 1080 1125 1140 1145 1155 1235 1240 1340 1370 1430
G mm 1150 1225 1275 1325 1350 1440 1500 1550 1615 1640 1750 1775 1940 1965 2040
H mm 785 785 785 785 950 950 950 975 975 975 1050 1050 1200 1200 1200
I mm 1780 2030 2080 2380 2300 2800 3500 3600 3600 3750 4180 4580 4600 5500 5600
J mm 735 735 735 810 975 975 975 975 1025 1025 1085 1110 1250 1250 1250
K mm 1325 1425 1475 1525 1475 1600 1700 1800 1875 1925 2100 2150 2300 2300 2500
L mm 1150 1225 1275 1325 1720 1845 1950 1985 2040 2040 2220 2200 2450 2360 2575
M ø mm 250 300 325 350 400 450 500 550 600 650 725 800 850 900 950
Tube withdrawal length mm 2450 2700 2750 3050 3300 3800 4500 4550 4550 4700 5100 5500 5700 6550 6600
O mm 250 250 250 250 300 300 300 300 300 300 400 400 400 450 450
P mm 525 550 620 675
Q mm 170 175 200 213
Water capacity L.W . m3 3,17 4,12 4,61 5,6 5,9 7,9 10,8 11,6 12,8 13,5 17,2 18,9 23,2 27,0 32,8
Steam chest at L.W . m3 0,55 0,7 0,9 1,1 1,4 1,8 2,1 2,5 3,1 3,4 4 4,7 5,8 6,5 7,2
Furnace diameter mm 600 700 700 750 800 900 975 1000 1025 1050 1200 1200 1375 1425 1550
Furnace length mm 2000 2250 2300 2600 2800 3300 4000 4100 4100 4250 4700 5100 5300 6150 6250
Flue gas volume m3 1,3 1,9 2,0 2,6 2,9 4,3 5,3 6,5 7,0 7,6 11,0 12,0 16,0 19,5 22,5
Flue gas temp. * C° 245 245 245 245 240 240 240 240 240 240 240 240 240 245 245
Flue gas resist.* mbar 5,0 8,5 7,5 7,5 9,5 10,0 10,5 10,5 10,5 12,0 11,0 13,0 12,0 10,5 10,5
Weight 8.0 bar kg 3500 4300 5100 6000 7100 8500 10000 11600 13500 15000 17500 21000 24000 27000 30000
Weight -10.0 bar kg 3700 4600 5500 6500 7700 9200 11000 12800 14700 16800 19200 22600 26500 29600 33000
Weight -13.0 bar kg 4000 5000 6000 7100 8500 10500 12000 14500 16500 18500 21500 25500 24500 27500 31000
Weight -18.0 bar kg 4500 5800 6800 8000 9500 11600 13600 16000 18300 20500 24000 24000 30000 35000 39000
* combustion of natural gas, O2 dry: 2.1%, 10 bar Subject to manufacturer’s right to make alterations 07-10-2011

 

Standard dimensions of connections in 8 bar and 13 bar boilers

OPTI Nr. 100 150 200 250 300 400 500 600 700 800 1000 1200 1400 1600 1800
Steam rating kg/h 1000 1500 2000 2500 3000 4000 5000 6000 7000 8000 10000 12000 14000 16000 18000
Manometer DN 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
Air valve DN 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
Desalting/Water test DN 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
Steam valve DN 50 65 80 80 100 100 125 125 150 150 200 200 200 200 250
Low-low level DN 2 x 50 2 x 50 2 x 50 2 x 50 2 x 50 2 x 50 2x50 2 x 50 2 x 50 2 x 50 2 x 50 2 x 50 2 x 50 2x50 2 x 50
Low level DN 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
Safety valve 8 bar DN 25 32 32 40 40 50 50 65 65 65 65 80 80 100 100
Safety valve 13 bar DN 25 25 25 32 32 40 40 50 50 50 65 65 65 80 80
Water gauge DN 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20 4 x 20
Feed & counter valves DN 25 32 32 32 32 40 40 40 40 40 50 65 65 65 65
Bottom blow-down DN 25 32 32 32 32 32 40 40 40 40 40 50 50 50 50

Subject to manufacturer’s right to make alterations.