For PM emission control in high temperature exhaust streams, such as fuel oil boilers, usual dedusters such as bag filters are very maintenance demanding. Particularly, diesel and fuel particulates are very sticky and clog to filter elements, unless protection reagents are used. Flue gas cooling is also needed in front of the filter when temperatures are higher than 200 ºC. On the other hand, regular cyclones and multicyclones are frequently not able to reduce emissions to present emission limits.
By Advanced Cyclone Systems, S. A. based in Porto, PORTUGAL.
Discontinuous control is used mainly in smaller steam boilers with low output since the temperature fluctuations in the boiler are fairly great as a result of irregular refilling with water. Continuous control, on the other hand, permits still more economical steam generation with high quality.
By IGEMA GmbH based in Münster, GERMANY.
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