Page 421 - Air Pollution Control Engineering

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Catalytic Oxidation 393

3
D Density of emission stream (lb/ft )
e
DE destruction efficiency (%)
3
D Density of fuel gas (lb/ft )
f
EC Equipment cost ($)
F Fan power requirement (kWh/yr)
p
h Emission stream desired heat content (Btu/scf)
d
h Emission stream heat content (Btu/lb or Btu/scf)
e
h Supplementary fuel heating value (Btu/lb)
f
HR Heat recovery in heat exchanger (%)
HRS Operating hours per year (h/yr)
∆P Pressure drop (in. H O)
2
P System pressure drop (in. H O)
2
Power Fan power requirement (kW-h)
PEC Purchased equipment cost ($)
Q Flow rate of combined gas stream (scfm)
com
Q Dilution air required (scfm)
d
Q Emission stream flow rate (scfm)
e
Q Supplementary fuel gas flow rate (scfm)
f
Q Flue gas flow rate (scfm)
fg
Q Actual flue gas flow rate (acfm)
fg,a
−1
SV Space velocity through catalyst bed (h )
TCC Total capital cost ($)
T Temperature of gas stream entering catalyst bed (ºF)
ci
T Temperature of flue gas leaving catalyst bed (ºF)
co
T Emission stream temperature (ºF)
e
T Temperature of emission stream exiting heat exchanger (ºF)
he
t Residence time (s)
r
T Reference temperature (77ºF)
r
V Waste gas flow rate (scfm)
3
V Volume of required catalyst bed (ft )
bed
REFERENCES
1. US EPA, Survey of Control Technologies for Low Concentration Organic Vapor Gas
Streams EPA-456/R-95-003 US Environmental Protection Agency, Washington, DC,
1995.
2. US EPA, Handbook: Control Techniques for Hazardous Air Pollutants. EPA 625/9-86-014
(NTIS PB91-228809) US Environmental Protection Agency, Washington, DC, 1986.
3. US EPA, Polymer Manufacturing Industry—Background Information for Proposed
Standard. EPA 450/3-85-019a (NITS PB88-114996). US Environmental Protection Agency,
Washington, DC, 1985.
4. US EPA Afterburner Systems Study. EPA-R2-72-062 (NTIS PB212560). US Environmental
Protection Agency, Washington, DC, 1972.
5. US EPA, Parametric Evaluation of VOC/HAP Destruction Via Catalytic Incineration. EPA-
600/2-85-041 (NTIS PB85-191187). US Environmental Protection Agency, Washington,
DC, 1985.