Ceramic
filters are such efficient filter products that
even micro fine particles generated in carbon
black production and from diesel fired power plants
are captured by the super efficient HEPA rated
filter medium. Carbon black is notoriously difficult
to filter but ceramic filters not only easily
capture these fine and sticky particles but also
deliver a stable pressure drop and a long life
filter. Diesel fuelled engines too can generate
fine and sticky soot particles but again they
are easily captured at the surface of the filter
giving reliability and a steady performance. There
are also options to control and reduce emissions
of SOx and NOx by adding appropriate chemicals
and sorbents.
Recovery
of heat energy is now the focus of many energy
intensive industries such as glass and cement
and fibrous ceramic filters offer a real opportunity
to maximize the benefits of heat recovery. The
filters reduce the particle loading of the gas
to such low levels that heat exchange or boiler
tubes are not fouled by fugitive dust and therefore
high quality heat energy can be recovered.
Processes such as waste to energy or biomass energy
plants can utilize the high temperature filtration
properties of fibrous ceramic filters to give
syngas and combustion gases or fuel that is completely
free of fine dust. Fine dust would otherwise foul
sensitive combustion equipment heat recovery systems
and boilers. Gasification of biomass is an ideal
application for fibrous ceramic filters.
The glass and cement industries produce hot gases
with dust SOx and NOx pollutants. Fibrous ceramic
filters with embedded catalyst and the use of
sorbents can reduce the emissions of these pollutants
to almost immeasurable levels and the cleaned
gases can then be used for energy recovery.
