SOLID FUEL FIRED : SPECIFICATION DATA CHART

Designed by Hurst to combine the best technologies from the old school of wood combustion and the latest advanced combustion control technologies.
A. Metering Conveyor
Extra Heavy Duty Screw Conveyor with Variable Frequency AC Drive
B. Rotary Air Lock Valve
Limits Excess Air for Improved Combustion Control, Increased Efficiency and Emission Control
C. “Frederick” Solid Fuel Stoker
Manufactured since 1918, it is unsurpassed in the dependable stoking of solid fuels
D. Fuel Pile
The fuel pile, maintained by the stoker, covers all the grates for Improved Combustion Efficiency and Emission Control.
E. Gasifier
A combination of the “Frederick” stoker, combustion air system, and lower combustion chamber. The Hurst “Gasifier” vaporizes the volatile gasses from the solid fuel, driven by the remaining carbon on the grates.
F. Combustion Chamber
Combustion Air is mixed with the volatile gas created by the gasifier and burned in this area of the furnace.
G. Combustion Air System
Two blowers, one under fire and one over fire, furnishes and controls the volume of air entering the Gasifier and Combustion Chamber. All above work in concert to reduce solid fuels into usable heat energy utilizing the most reliable system yet devised. Our “cruise control” system orchestrates the operation of each to match the steam load and maintain efficient combustion.

All above work in concert to reduce solid fuels into usable heat energy utilizing the most reliable system yet devised. Our “cruise control” system orchestrates the operation of each to match the steam load and maintain efficient combustion.
H. “Hybrid” Design Boiler
Originally built in Germany, the “Hybrid” design is unequaled in the heat recoery from solid fuels.
Ha. Water Tube Section
The watertube section of the “Hybrid” boiler allows for abundant radiant heating surface. This allows for quicker recovery and more efficient heat transfer than in the typical firetube boiler.
Hb. Fire Tube Section
The fire tube section of the “Hybrid” boiler allows for greater water volume and thermal reserve than the typical water tube boiler. Quick response with the additional capacity to handle spike loads is the result. In addition, the two pass design increases gas velocity and efficiency and a cleaner boiler result.
Hc. Steam Space
The fire tube section of the “Hybrid” also allows for several times the steam space of a typical boiler. The larger steamrelease surface is calmer, reducing carry over of unevaporated water. The resulting drier steam also reduces system scaling. In addition, dry steam helps eliminate unnecessary extra condensate. Energy and fuel are saved.
I. Boiler Blowdown
J. Handhole
The waterside openings are located in the most effective positions. The lower hand holes offer far better access for both clean out and inspection.
K. Manway
L. Continuous Blowdown
M. Soot Blower
Fixed zone
N. Insulation And Jacketing
2’ High Density fiberglass insulation and 22 ga. zinc coated metal jacket.
O. Rear Smoke Box
Liberal and easy accessible gas turn around area. No large refractory doors or wet back to work around.
P. Reinjection Blower
Continuously cleans rear smoke box.
Q. Skids and Support Structure
Unit is skid mounted with rear supports for easy handling and set-up.
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