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Cyclonic Scrubbers

CFW supplies both high and low efficiency cyclones that handle particle sizes of as low as ten microns. Multicyclones can also be provided. For a cost-effective solution that will protect the safety of your workers and equipment, ensure compliance with environmental guidelines or legislation, and increase productivity while cutting costs, consider CFW Environmental.

cyclone scrubber and reverse pulse filter

The image above shows a CFW cyclonic scrubber at the left, with a reverse pulse filter on the right.

Cyclonic scrubbers are a cost-effective means of removing relatively large particles and are somewhat effective in removing very soluble gaseous pollutants.

During operation, gas introduced into a chamber moves through the scrubber in a spiral or corkscrew fashion. A fine spray of liquid is introduced, and contaminants are caught by the droplets, which are thrown to the walls in accordance with the cyclone principle and flushed out. Various inlet types are used, but tangential entry of the gas stream is the most common.

There are several types of cyclonic scrubber, including irrigated cyclone scrubbers and cyclonic spray scrubbers. Airflow in irrigated cyclones is initially downward from the top of the device, but moves back up in a tighter spiral, where clean air exits. In cyclonic spray scrubbers, the gas enters the chamber tangentially at the bottom, leaving at the top. Liquid is sprayed from a centre manifold. They are an effective and low-cost solution, though with somewhat lower particle removal efficiencies than venturi scrubbers. Longer cyclones with smaller diameters tend to be more effective because contact time between the liquid and the contaminated air is increased.

Cyclonic have low to moderate levels of energy use, with pressure drops that depend on the diameter. Where corrosion or difficulties with wastewater collection may be encountered, custom solutions or dry scrubbers may be needed.

Cyclones are a relatively simple and well-established technology, but proper maintenance remains important as the high air velocities achieved can lead to erosion. To minimize maintenance and replacement costs due to erosion, the inside of the chamber may be coated with abrasion-resistant material (particularly around the inlet) or pre-cleaners such as settling chambers may be used to remove heavier particles.