DUST FILTRATION SYSTEM

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Outline

1.Dust Sources.

2.Main Filter Techniques

1.Electro static precipitator

2.Pulse Jet Filters

1.Bag Filter

2.Cartridge Filter

3.Bag Filter best performance techniques

4.Piping

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Dust Source

Material Crushing

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Transfer Chute

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Electrostatic Precipitator

Operation Method

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Electrostatic Precipitator

Resistivity Range of Measurement Precipitator Characteristics

Low between 104 and 107 ohm-cm

1. Normal operating voltage and current levels unless dust layer is thick enough to reduce plate clearances and cause higher current levels.

2. Reduced electrical force component retaining collected dust, vulnerable to high reentrainment losses.

3. Negligible voltage drop across dust layer.

4. Reduced collection performance due to (2)

Normal between 107 and 2 x 1010 ohm-cm

1. Normal operating voltage and current levels.

2. Negligible voltage drop across dust layer.

3. Sufficient electrical force component retaining collected dust.

4. High collection performance due to (1), (2) and (3)

Marginal to High between 2 x 1010and 1012 ohm-cm

1. Reduced operating voltage and current levels with high spark rates.

2. Significant voltage loss across dust layer.

3. Moderate electrical force component retaining collected dust.

4. Reduced collection performance due to (1) and (2)

High above 1012 ohm-cm

1. Reduced operating voltage levels; high operating current levels if power supply controller is not operating properly.

2. Very significant voltage loss across dust layer.

3. High electrical force component retaining collected dust.

4. Seriously reduced collection performance due to (1), (2) and probably back corona.

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Electrostatic Precipitator

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Electrostatic Precipitator

• Advantage:1.High Efficiency up to 99.92.Low maintenance cost3. low operating cost

• Disadvantage:1.Explosion risk CO content more

the 0.2%2.High initial cost3.Big Space4.Parameters control

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Bag Filter Pulse jet filter

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Bag Filter Pulse jet filter

• Advantage:1.High Efficiency 2.Low Initial cost3.Save Space4.Few parameter to control

• Disadvantage:1.High Maintenance cost2.High operating cost

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Cartridge filter Pulse jet filter

• Advantage:1.High efficiency 2.Save space More the Bag

filters3.Few parameter to control4.Very high Filtration Area

• Disadvantage:1.High maintenance cost2.High operating cost3.High replacement part cost

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Bag Filter best performance techniques

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Bag Filter best performance techniques

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Piping

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Piping

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Piping

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