Alternative Fuel Systems - Sales and Technical Guide
Alternative Fuel Systems - Sales and Technical Guide
Alternative Fuel Systems - Sales and Technical Guide
Section 1 - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Section 2 - Digester and landfill gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Definition and sources . . . . . . . . . . . .
2.2 Characteristics of digester gas . . . . . . .
2.3. Digester/landfill gas system evaluation.
2.4. Components. . . . . . . . . . . . . . . . . . .
2.5. Control Schemes. . . . . . . . . . . . . . . .
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SECTION 1: INTRODUCTION
Cleaver-Brooks defines alternative fuel(s) as that which is other than standard
commercially available fuel; used with a burner/boiler combination. Standard,
commercially available fuels include natural gas, light oil, and heavy oil. Hence, all
other fuels including but not limited to digester gas, landfill gas, solvents, waste
oils, hydrogen, town gas, or biogas are considered nonstandard, waste, or
alternative.
Over the years, Cleaver-Brooks has offered alternative fuel systems and gained
considerable experience in this field, including custom designs engineered around
specific onsite requirements.
We have developed standard systems to fire digester and landfill gas. All other fuels
will require up-front evaluation.
Chemical Formula
CH4
CO2
H2S
H2O
CO, N2, O2
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% Vol
50-65
35-50
Trace 2
3-6
1-10
Units
Digester Gas
Natural gas
Heating Value
Btu/Scf
500-600
950-1100
N/A
0.85 0.95
0.6 0.64
Hydrogen Sulfide
% Vol
Trace - 2
None
Water Vapor
% Vol
36
(Saturated)
None
Temperature
degF
75-120
Ambient
6-15
27.7 277 (1 10
PSIG)
Supply Pressure
IWC
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Digester Gas
Tag #
PCV-020
HV-020A
PSL-020A
FV-020A
FV-020B
FV-020C
PSH-020
HV-020B
CV-020
PSL-020B
T-020
Function
Gas Pressure Regulator
Manual Shut Off Valve
Low Gas Pressure Switch
Automatic Shut Off Valve
Vent valve
Automatic Shut Off Valve
High Gas Pressure Switch
Manual Shut Off Valve
Firing Rate Modulating Valve
Automatic Fuel Changeover Switch *
Flame Arrester with Check Valve*
* Optional components
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Hydrogen
Refinery gases
Contaminated air
Solvents
Waste oil
Solid fuels
Acids
Radioactive material
Caustics
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