GEA Emission Control Technology GEA Cyclone

GEA centrifugal separators for exhaust gas cleaning in the process industry.

Collection principle: The gas to be cleaned is brought into rotational flow in a cylindrical collection chamber, resulting in high centrifugal forces which fling the dust particles against the outer wall. From there the spiral down into the dust hopper, while the cleaned gas leaves through a central pipe. The collection efficiency essentially depends on the size of the dust particles, the specific gravity of the dust and the geometrical proportions of the centrifugal separator. Owing to the high collection efficiencies currently demanded, centrifugal separators are new generally used only as coarse particle and preliminary separators, e.g. to protect fans, boiler heating surfaces and heat exchangers from wear or the formation of accretions and to reduce the dust load of more efficient final separators. Centrifugal separators are also used in chemical process technology e.g. for dust recycling systems. The smallest particle size that can be efficiently collected is 5-10 µm, depending on the dust properties. The pressure drop is 6 – 20 mbar. There are two types of centrifugal separator: Cyclone and multiclones.

Cyclones

GEA Cyclone

Cyclones are suitable for medium collection efficiencies. Their diameter generally ranges from 0.5 to 5 m depending on the gas rate – more in special cases. They are used particularly for reducing high dust contents upstream of a fine cleaning stage or before fans and can be designed for gas temperatures up to 1000 °C.

Mostly GEA Cyclones are used for the pre-dedusting of waste gases with dust load.

 

Multiclones

GEA Multiclone

A multiclones takes up less space than a large cyclone for the same gas throughout. The type of construction and the arrangement of the gas inlet and outlet can be varied within wide limits, enabling multiclones to be easily incorporated into existing plants.

Multiclones consist of a large number of collecting tubes arranged in parallel (diameter 230 mm) with interval vane ring which force the dust-laden gas to rotate. The cleaned gas flows up through the collecting tubes into the clean gas manifolds. The inclined design of these tubes makes the multiclones easily accessible for inspection. The multiclones tubes are smaller in diameter than a large cyclone and therefore higher centrifugal forces can be obtained.

Thus it is possible to collect even relatively fine dust particles (2 -5 µm) from the carrier gas. The distribution of the gas volume over many individual elements results in low dust loads on the collecting surfaces, which means that long service lives are possible even when highly abrasive dust is collected.

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Multiclones

A multiclones takes up less space than a large cyclone for the same gas throughout. The type of construction and the arrangement of the gas inlet and outlet can be varied within wide limits, enabling multiclones to be easily incorporated into existing plants. Multiclones consist of a large number of collecting tubes arranged in parallel (diameter 230 mm) with interval vane ring which force the dust-laden gas to rotate. The cleaned gas flows up through the collecting tubes into the clean gas manifolds. The inclined design of these tubes makes the multiclones easily accessible for inspection. The multiclones tubes are smaller in diameter than a large cyclone and therefore higher centrifugal forces can be obtained. Thus it is possible to collect even relatively fine dust particles (2 -5 µm) from the carrier gas. The distribution of the gas volume over many individual elements results in low dust loads on the collecting surfaces, which means that long service lives are possible even when highly abrasive dust is collected.

 

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How can we help you?