Fiber Bed (Candle Filters)

Fiber Bed (Candle Filters)

Fiber bed (candle filter) mist eliminators are used to remove fine particles from a gas stream. Fine particles include sub micron particles (i.e. below 1 micron) and particles between 1 and 3 microns. All fiber bed mist eliminators are cylindrical with fiber or fiber/metal mesh layer fitted between two concentric cages and are usually installed on a tube sheet in a tower. Soluble solids can be handled efficiently by dissolving them in a solvent. Insoluble solids can be handled to a moderate degree as well, however excess insoluble solids can cause plugging of the fiber bed mist eliminators.

Types of Galiakotwala Fiber Bed Mist Eliminators

Brownian Movement

Fiber Bed mist eliminators that are used for particles in the range of 0.1 to 3 microns.

BMB Series : Most efficient fiber bed mist eliminators due to maximum randomization of fiber. Randomization enhances capture of particles due to Brownian movement. Fiber is precision packed to ensure optimum efficiency and pressure drop. This type of candle filter is made with a cylindrical cage and special high efficiency fiber. For enhancement in drainage and avoiding re-entrainment of separated liquid, a special layer can be included (BMRB Series).

BMW Series : High efficiency fiber bed mist eliminator with lower pressure drop than the BMB series. Fiber is precision wound to ensure optimum efficiency and pressure drop. A special layer is included, for enhancement in drainage and avoiding re-entrainment.

Impaction Movement

Fiber Bed mist eliminators that are used for particles in the range of 0.1 to 3 microns.

IMB Series : Handles much higher gas flows than Brownian movement candles therefore the required number and size of candles reduces significantly compared to Brownian movement type candles. Fiber is precision packed to ensure optimum efficiency and pressure drop. These types of mist eliminators primarily use impaction and interception mechanisms to collect particles.

IMM Series : Similar efficiency and gas handling capacity as the IMB series. Fiber mats are used as filtration medium. Mats of different composition can be used based on the required efficiency and pressure drop.

IMW and IMW-AP Series : Handles higher gas flows than IMB/IMM series. Fiber is precision wound to ensure optimum efficiency and pressure drop. Drainage is enhanced by using a metal mesh as a drainage layer.

IMW-CK Series : This is a new development which uses co-knit layers of high efficiency fiber and metal. Filtration and drainage layers are enhanced allowing better efficiencies and longer time intervals between cleaning cycles, reducing downtime.

For all types of candles cages and fiber are made from different materials based on customer applications.

Typical Applications

Process	Location	Recommended Equipment
Sulphuric Acid	Drying Tower	IMW / IMW-CK / IMB / SX-CK Mesh Pad
	Interpass Absorption Tower	BMW / BMB / IMW-AP
	Final Absorption Tower	BMB / BMW / IMB / IMW-AP / SX-CK Mesh Pad
	Cross Flow / Product Stripper	BMB / BMW
	Acid Concentrator	BMB / BMW
	Oleum Vent Tanks	BMB / BMW
	Tail Gas Scrubber (Caustic / Ammonia)	BMB / BMW
- Chlorine	Wet Chlorine	BMB / BMW
	Dry Chlorine	BMB / BMW
	Hydrogen	BMB
Phosphoric Acid	Absorber	BMB / BMW
Nitric Acid	Evaporator Towers	BMB / BMW
Urea Fertilizer	Prilling Towers	BMB / BMW
Nitric Acid	Catalyst	BMB / BMW
	Post Absorbing Tower	IMW-AP / IMB
	Neutralizer and Evaporator	CK Mesh Pad / BMB / BMW
Blue Haze Applications	Plasticizer Solvent Fume Removal	BMB / BMW
	Lube Oil Haze from Rotating Equipment	BMB / BMW
	Metal Working Operations	BMB / BMW
	Plastics Processing	BMB / BMW
	Asphalt Production	BMB / BMW
	Loading Fabric, Testing and Coating	BMB / BMW

Repacking Services

We also provide repacking services for candle filters, where the cage is in good condition and the fiber is not usable. Repacking usually restores the candles efficiency and pressure drop to levels similar to a new candle.