Bagfilters are the technology of choice in many cases when low dust content is needed for gas cleaning. Their ability to remove large Ioads on a non-selective basis has made them important for many applications.
GEA bagfilter technology and design features for the process industry.
When dust-laden gases flow through a porous layer of fabric or felt, the dust is separated from the carrier gas and is deposited on the filter medium. It is re-moved periodically and falls into the dust hopper.
The filter materials used are woven or non-woven fabrics made from natural or man-made fibres as well as inorganic fibres (glass, mineral or metal fibers).
This technology has been optimized for large, multiple-compartment designs, containing up to 1,150 bags at 8 meter length each which equals around 3,700 square meter filtration area per cell. Pulse air equipment required is minimal.
Those features are results in low maintenance costs and minimum initial investment. Low pressure bagfilters are operating in the cement-, the iron and steel as well as in the non-ferrous metallurgical industry.
In case of changes in the upstream process or if lower clean gas dust loads are required it can become necessary to change from a dry precipitator to a bagfilter. GEA is expert for such retrofits bagfilter components are installed in the existing electrostatic precipitator (ESP) casing.
We make sure that every client receives the solution tailored to their need in a cost-effective manner and on time.
Baghouse – kilns & clinker coolers
Converting ESPs and reverse-air filters to low-pulse-pressure baghouses
NOX control system
Air-to-gas coolers – for cement clinker coolers
SO2 and acid gas scrubber systems
Energy recovery systems
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.
GEA has been building electrostatic precipitators for cleaning industrial process for over many years. Well over 12.000 units have been supplied to firms all over the world. Being the air pollution control technology supplier of choice, GEA offers innovative system designs, state-of-the-art microprocessor controls and constantly upgrades and rebuild enhancement strategies for your specific situation.
Seeking to provide a flexible unit, capable of mastering manifold industrial off-gas problems, resulted, in 1950, in the development of an adjustable annular gap scrubber which today ranks among the outstanding high-efficiency scrubbers. As far as grain size of solid and liquid dust particles and concentration of gaseous components in a gas mixture are concerned, practically no minimum limit is set for the annular gap scrubber in regard to the separation.
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