Carbon Discarbs and Panels

Activated Carbon Filters are used in Kitchen Extracts to remove odours from the air before discharging to atmosphere. Metal cased carbon discarbs hold multiple bonded panels in a “block” which can then be easily installed into the duct. Carbon panels are also available in standard and non standard sizes for suitable installations.

Data Sheet

To order please call 01277 523 655
or email: info@thefilterbusiness.com

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Description

Carbon filtration is ideal for removing unpleasant  or even dangerous odours and gases from a wide variety of sources.

The ever increasing awareness of this problem from public health authorities and environmentalists has resulted in an increase in the use of the unique properties of activated carbon filtration.

Carbon will adsorb chemical molecules in the air stream in varying degrees according to the type of contaminant and the period of time the air remains resident in the carbon. Activated Carbon in it’s loose granular form can present problems as there is a tendency for granules to abrade one another, this causes both settlement of the carbon – creating potential bypass voids and produces carbon dust that can be re-entrained into the air-stream.  The unique bonding method eradicates these problems by producing a solid and stable biscuit of consistent quality and dimensional stability that produces an even resistance. Once formed the biscuits are bonded in a rigid mitred  ‘U’ channel Frame or discarb matrix.

Due to the complex nature of adsorption carbon filters are generally designed to suit the application, however, the following information is given as an indication of the physical requirements for it’s use.

As far as possible water vapour should be eradicated from the air-stream to eliminate condensation within the filter that could cause porous blockage causing a dramatic increase in resistance – this also applies to loose carbon, however humidity levels as high as 80% RH are normally acceptable providing no interstitial condensation takes place.
Air-stream temperatures entering the filter in excess of 40°c should be avoided. In the case of anticipating temperatures above this level steps should be taken to reduce the temperature to an acceptable level by fresh air bleed, cooling coil or heat exchanger. In catering and food preparation applications smoke and grease must be removed from the air-stream prior to entry into the carbon

In order to ensure a carbon filter operates satisfactorily certain criteria need to be met which do not apply to particulate filters. The most important aspect is the “dwell time” (the period of time the air is in contact with the carbon).  The minimum dwell time used is 0.1 seconds and this is shown below as maximum permissible airflow. The dwell time may increase considerably according to the contaminant to be removed.

Due to the complex nature of adsorption carbon filters are generally designed to suit the application, however, the following information is given as an indication of the physical requirements for it’s use.

Filter TypeTypical Panel Size
(HxWxD)
Maximum Permissable Airflow
(m3/s) at 0.1 sec dwell time
Resistance at 0.1 sec (pa)Resistance at 0.2 sec (pa)
Panel Frame595 x 595 x 20mm0.0710050
Panel Frame595 x 595 x 45mm0.1610050
Panel Frame600 x 600 x 22mm0.0710050
Panel Frame495 x 495 x 18mm0.0610050
Discarb597 x 297 x 597mm0.5213065
Discarb597 x 597 x 293mm0.5213065
Discarb597 x 198 x 597mm0.3413065
Discarb597 x 597 x 597mm1.0413065