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O-Type :
An O-type watertube boiler represents an alternate way of designing watertube boilers. It is symmetrical, well balanced and very compact compared to D-type boilers and A-type boilers.
Capacities for Thermoboil O-type package units can go as high as 250,000 lbs/hr (115 tons/hr) with pressures up to 1500 psig (103 bar) and temperatures up to 1000F (537 C).It is appropriate where space is limited. It can be field erected if required by site conditions or for size larger than 250,000 lbs/hr (115 tons/hr).
It can fire any fuel but may be less appropriate to fire no.6 oil than an A-type or D-type boiler. Solid fuels like wood wastes cannot be fired in the O-type furnace and if used have to be burned in separate combustion chamber. The boiler then is used as a waste heat recovery boiler.
Superheaters are radiant and convective type and produce quite stable superheated steam temperatures over all firing range .That design can be built with membrane waterwalls or with tangent tubes. Furnace sizes are smaller than a D-type or an A-type and will result in higher heat release rates influencing NOX levels. They are also used as heat recovery steam generators.
O-types are popular as portable boilers and boilers for rents. They are often use for cogeneration, petrochemical industries, industrial processes etc.
It is a well balanced boiler design. O-type boilers are easier to ship by road or by train than D-type boilers because of the fact that their shape will ease the passage through tunnels or bridges and that their center of gravity is on the center of the unit.

Capacities:From 20,000 lbs/hr (10 tons/hr) to 250,000 lbs/hr (115 tons/hr) with or without superheater
Pressures:250 psig (17 bars) design up to 1500 psig (100 bars)
Superheaters: Temperature up to 950 F (510 C)
Fuels:Oil, gas or combination
-Membrane or tangent tube wall construction to ASME code sectionI
-Optional water cooled membrane rear wall
-Optional water cooled membrane front wall and burner throat
-Steam purity up to 1 ppm


Otype Watertube Boiler:

Physical Data  "O" Type Steam Watertube Boiler:


 

 
Boiler
model number
Capacity
tons/hr
-A-
Length
mm
-B-
Width
mm
-C-
Height
mm
-D-
Base width
mm
-E- -F-
Gas outlet mm
Width Length
Weights
(In kg)
Dry Flooded
O-1-30 13.5 5485 3100 4190 2135 1375 860 27000 38000
O-1-40 18.0 5995 3100 4190 2135 1375 860 29000 41000
O-1-50 22.5 6500 3100 4190 2135 1525 1000 32000 43000
O-2-60 27.0 7010 3100 4190 2135 1525 1000 34000 45000
O-2-70 32.0 7315 3530 4500 2465 1525 1000 39000 54000
O-2-80 36.5 7820 3530 4500 2465 1525 1000 41000 56000
O-2-90 41.0 8230 3530 4500 2465 1830 1070 43000 61000
O-2-100 45.5 8735 3530 4500 2465 1830 1070 45000 63000
O-3-110 50.0 9270 3760 4570 2690 1830 1220 50000 70000
O-3-125 57.0 9750 3760 4570 2690 2135 1475 52000 72000
O-3-150 68.0 10490 3760 4570 2690 2135 1475 57000 77000
O-4-175 79.5 12015 3860 5000 2820 2135 1675 66000 95000
O-4-200 91.0 12750 3860 5000 2820 2300 1980 70000 100000
O-4-250 113.5 13970 3860 5000 2820 2300 1980 75000 109000

*All dimensions are metric

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