S DOCUMENTThis specification covers reverse pulse jet baghouses, with induced draft fan, installed on packaged boilers fired by coal, coal and gas, coal and oil, or a combination of coal, oil and gas.

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material, individual parts, and finished product, provided form, fit, and function requirements are satisfied.

3.7 Design. The baghouse shall be designed in accordance with the manufacturer's standard design and the additional requirements specified herein. The baghouse shall be designed for the gas temperatures, dust concentration, gas composition, and dust physical properties typical of this application. The baghouse shall be designed to have a minimum of four individually operated modules. Draft shall be provided by an induced draft fan provided with the baghouse. The bags shall be cleaned with a fully automated reverse pulse air system. The baghouse shall be designed for the following operating parameters as specified (see 6.2).

a. Maximum gas flow in cubic feet per minute (ft3/min) (cubic metre per second (m3/s)). b. Minimum gas flow (ft3/min) (m3/s).

c. Location of installation site.

d. Elevation of installation site in feet (metre (m)) above sea level. e. Earthquake construction zoning required at the installation site.

f. Required draft at boiler flue gas outlet, in inches of water (pascals (Pa)), at maximum gas flow conditions.

g. Reverse pulse air pressure available in pound per square inch gage (psig) (kilopascals gage

(kPa (gage)).

h. Volume of reverse pulse air available (ft3/min) (m3/s).

i. Maximum, minimum, and average anticipated ambient air temperatures degrees Fahrenheit

(°F) (degrees Celsius (°C)).

3.7.1 Pressure drop. Unless otherwise specified (see 6.2), the pressure drop from the induced fan suction to the boiler flue gas outlet shall be not greater than 8.0-inches of water column

(1 990.7 Pa). Pressure drop shall be when operated at maximum gas velocity rates (see 3.7.2)

with one module off line.

3.7.2 Baghouse gas velocity. Unless otherwise specified (see 6.2), the ratio of gas volume in cubic feet per minute (ft3/min (m3/s)) to baghouse area in square feet (square metre (m2)) shall be not greater than 5.0 feet per minute (1.5 metre per minute) with one module off line.

3.7.3 Induced draft fan design. The induced draft fan shall be designed to handle 120 percent of the maximum specified volume specified in 3.7. This shall be accomplished while generating a draft equal to 125 percent of the sum of the required draft at the boiler outlet and the pressure drop of 3.7.1.

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