Characteristics of the Ceramic Fiber Filter
Cleaning method：
Its main substrates are alumina and silica.
Operating temperature：
Its long-term maximum operating temperature is 1100℃ when only dedusting is considered. For catalytic ceramic fiber filter, the recommended operating temperature is 250℃-400℃.
Corrosion resistance：
Resistant to acid and alkali corrosion( except for super acid and super alkali such as HF, H₃PO4, Na₂O, K₂O when no alkali agent is added)
Non-combustible：
It can contact with the fire directly and it is non-combustible.
Physical strength：
Unlike the traditional bag filter, the ceramic fiber filter can maintain high physical strength at room temperature or high temperature without keel supporting.
Physical structure：
It is made of ceramic fiber to be porous structure, and its wall thickness is 10-20mm.
Filtration velocity：
Generally set from 2cm/s to 5cm/s, which is far quicker than the filtration velocity of the bag filter. And it can be adjusted according to the actual working conditions.
Filter resistance：
The filter resistance is only 100pa at room temperature.
System resistance：
The resistance of the whole dedusting system is generally 2000-2300pa.
Filtration accuracy：
It can filter dust larger than 1 micron. For dust smaller than 1 micron, the dedusting effect is also very good if special reagents are added.
Dedusting efficiency：
Up to 99.99%.
Service life：
The ceramic fiber filter can normally be used for 5-10 years, and even more than 10 years for many enterprises.
Cleaning Design
Cleaning method:
Clean with pulsed compressed gas backflushing
Backflush pressure:
Generally, the pressure used is between 0.4mpa and 0.7mpa, which will be determined according to the parameters of the dusty gas and the specifications of the filter.
Backflush time:
The backflush process lasts only 0.15 seconds.
Backflush cycle:
The backflush cycle can be set up based on the pressure difference. When the pressure sensor reaches the set parameters, the backflush process start.
Backflush Air Volume:
Generally, the amount of compressed gas needed for each filter is the amount of the filter’s volume.
Backflush design:
Each backflush tube can generally be used to blow 18 to 20 small diameter filters , or 8 to 10 large diameter filters. The system structure could be designed according to this.
No expansion of bags:
Unlike the traditional bag filter, the ceramic fiber filter itself is a rigid structure. The backflush cleaning process will not expand nor deform the filter.
No raised dust:
During the backflush process, the dust cake fall off from the ceramic fiber filter without secondary raised dust caused, while bag filter will cause secondary raised dust.
