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The World Of Ceramic Filters And Their Uses In Our World

Mar 21, 2008
Historically ceramic filters were designed to filter out toxic gas from industrial factories. They are very good for filtering through hot gas of up to 1000 degrees Celsius, which from an ecological point of view is an advantage for dust removal. High temperature filtration allows there to be a continuous removal of dusts and particles from gas flumes in plants and factories.

Ceramic filters still maintain their function as hot gas filters, with the added benefit of containing extra features for easier scrubbing and cleaning. These differ from other normal hot gas filters as the filtration material is made from ceramic, which are good for extremely high temperatures. The processes of hot gas filtration are chemical and can also be used for incineration of hospital and clinical waste.

Ceramic filters are good for cooling during filtration, which is also beneficial for waste incineration plants, refineries, power station processes, separating aluminium and zinc dust, incineration radioactive clothing and cement industry to name a few. These are also seen to be useful for metal making industries and recycling of other precious metals.

Often these filters which are rigid, are expensive, however, hot gas ceramic fibres are inexpensive but perform just as well. Using these kinds of filters is good for practically all high temperature filtration, where the gas may contain dust and smoke. Conventional hot gas filters work up to a point of their temperature, because they have a temperature limit and have inadequate temperature resistance. Ceramic filtration can work up to a higher temperature with specially designed filters working beyond 1000 degrees Celsius.

Filters like these are good of thermal shock resistance, they are unaffected by sparks and particles, often resistant to acid gas, high filtration efficiency and allows gas to flow aerodynamically avoiding the build up of particles between the elements. These filters are tested on coal combustion factories and coal gasification industries. These are also good for prevention of erosion and corrosion of the pipe flumes.

There are disadvantages involved with using a ceramic filtration material, which can often lead to high cost maintenance and damage repairs. These can be caused by chemical particles in the gas to corrode the outer layer of the ceramic, incomplete removal of particles when cleaning the filters and sometimes delaminating of the outer layer. Other factors such as building a strong support frame for the heavy weight filters and the cost of maintenance. As they are heavy and large, they require close monitoring at all times.

Despite the disadvantages, these filters have been the best devices for many factories and industries, practically filtering all of the harmful particles and lasting longer than previous designs.
About the Author
Anna Stenning is knowledgeable in the world of hot gas filters, specifically ceramic filters, having understood its main purpose when working in a hospital environment.
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