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Steam Boiler Efficiency Program - Allows for a Multiple Fuel Feed

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1. This program calculates the Boiler Efficiency for Steam Boilers just like the BOILER1 program, but unlike the BOILER1 program this program allows the input of multiple fuels (3 fuels maximum). The program can handle many different types of fuels including bark, coal, oil, natural gas, other gases and other fuels. Also the program calculates the amount of air needed for combustion and the mass flow and volume flow of Flue Gas. The inputs to run this program include:

a. Boiler Rated Capacity: (lbs steam/hour)
b. Boiler Load During Test: (lbs steam/hour)
c. Number of Water Walls:
d. Percent Boiler Continuous Blowdown:
e. Steam Header Pressure : (psig)
f. Steam Header Temperature: (F)
g. Boiler Drum Pressure: (psig)
h. Feedwater Temperature: (F)
i. Fuel Supply Source: (County or state)
j. Fuel Type:
(1) Bark
(2) Coal
(3) Oil
(4) Natural Gas
(5) Other Fuel
k. Fuel Consumption During Test: (lbs/hour)
l. Fuel Properties (Percent Mass Wet Basis)
(1) Provided by program if you picked (1), (2), (3) or (4)
(2) Percent Carbon
(3) Percent Hydrogen
(4) Percent Sulfur
(5) Percent Oxygen
(6) Percent Nitrogen
(7) Percent Water
(8) Percent Ash
(9) Fuel HHV (Btu/lb)as received
m. Percent Excess Air
n. Percent Unburned Carbon in the Ash:
o. Inlet Combustion Air Temperature: (F)
p. Flue Gas Discharge Temperature: (F)
q. Combustion Air Wet Bulb Temperature: (F)
r. Plant Elevation Above Sea Level for Determination of Air Pressure: (ft)
s. Enter Manufacturers Percent Margin of Unaccounted Loss:

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Example #1 - BOILER3 Program

In this example the plant was considering the use of a combination of coal, mill bark from the pulp mill debarking facility and purchased bark. The 3 fuels and the feed rate to the boiler are listed below:

  Fuel Feed Rate Fuel HHV as rec'd Fuel Energy Feed to Boiler
1. Coal 10,000 lbs/hour 12,500 Btu/lb 125,000,000 Btu/hour
2. Mill Bark 15,300 lbs/hour 5,400 Btu/lb 82,620,000 Btu/hour
3. Purchased Bark 38,000 lbs/hour 5,177 Btu/lb 196,726,000 Btu/hour
4. Total 63,300 lbs/hour 6,387.77 Btu/lb 404,346,000 Btu/hour

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Computer Program Example


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