wet collectors

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WET COLLECTORS GROUP MEMBERS: MUHAMMAD BIN KAMARUDDIN (17DAS14F1039) SITI NUR IDAYU BT. MOHAMMAD GHAZALI (17DAS14F1037) FATIN SHAHIRA NABILA BT. SHAHROM (17DAS14F1041)

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Page 1: Wet collectors

WET COLLECTORSGROUP MEMBERS:

MUHAMMAD BIN KAMARUDDIN (17DAS14F1039)

SITI NUR IDAYU BT. MOHAMMAD GHAZALI (17DAS14F1037)

FATIN SHAHIRA NABILA BT. SHAHROM (17DAS14F1041)

Page 2: Wet collectors

IMPINGEMENT SCRUBBER

These scrubbers usually have one to three horizontal plates, each of which has a large number of small holes.

The gas stream accelerating through the holes atomizes some droplets in the water layer above the plate.

Particles impacts into these water droplets.

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Advantages & Disadvantages of

impingement scrubbersAdvantages • Can handle flammable and explosive dusts

with little risk.

• Provide gas absorptions and dust collection in single unit.

• Can handle mists.

• Provides cooling for hot gases.

Disadvantages • Effluent liquid can create water pollution

problem.

• Waste product collected wet.

• High potential for corrosion problem.

• Disposal of waste sludge may be very expensive.

Page 5: Wet collectors

Spray tower• This is the simplest type of particulate wet scrubber in commercial

service

• Sets of spray nozzles located near the top of the scrubber vessel generate water droplets that impact with particles in the gas stream as the gas stream moves upwards.

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Function:

• Removal of air pollutants by inertial or diffusional impaction, reaction with a sorbent or reagent slurry, or absorption into liquid solvent

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Advantages & Disadvantages of spray tower

Advantages • Relatively low pressure drop.

• Relatively low capital cost.

• Relatively free from plugging

• Relatively small space requirement.

Disadvantages • May create water (or liquid) disposal

problem.

• Waste product collected wet.

• Relatively low mass-transfer efficiencies.

• Relatively high operating costs.