What do you need to know before buying a dedusting system?
Post processing dust is dangerous pollution. Inhaled with air it leads to serious health problems for every person present in such working place. Furthermore, dusts can combust rapidly and cause fire and explosion causing huge losses. That is why dedusting systems are needed to be installed. What should be considered before choosing a given dedusting solution?
Kinds of dedusting devices
Within the product range of Filtrowent International there are a few dedusting solutions:
- Central baghouse dust collectors – ODP and JET
- Multifunctional dust collectors – ODM-P and ODM-K
- Stationary dust collectors – MDF
Each solution finds a different application in industry. For example the ODP and JET dust collectors are characterized by their versatility – they can be used in many different industries, where there is a problem of dusted air in closed space. These devices are used for filtrating big amounts of dust produced by processing machines or whole production lines. A bit different application is of the MDF type dust collectors – these are used for individual/single processing machines such as wood processing stands in carpentry. Cyclones are used for chips and they can be used either as an independent dedusting device or as an integral part of a whole dedusting system where they are connected with a dust collector and work as an initial separator while dust collector (ODP, JET or ODM type) performs the main air filtration.
Pollution types and dust concentration
In order to make sure the chosen dedusting solution is going to be effective, the following criteria should be considered:
- Type of dust – many dust collectors have a wide range of applications, however the more information about the dust to be collected, the better as it provides important information for the adequate selection of the dust collector
- Dust concentration – the higher dust concentration, the higher efficiency of a dust collector is required. A system of low efficiency will not be able to clean the air effectively.
Explosion risk zone
In case of combustible dusts – such as paper or wood dust – the matter of explosion risk is of great importance. According to the ATEX directive, all devices located in a potentially explosive area, have to meet the specific requirements. Depending on the frequency and duration of the occurence of probability of such risk, the ATEX directive differentiates three zones:
- Zone 20 – It is a place where an explosive atmosphere in the form of a cloud of combustible dust in the air (dust concentration between the lower and upper explosive limits) is present continuously, long or frequently during normal operation of the processing machines,
- Zone 21 – It is a place where an explosive atmosphere in the form of a cloud of combustible dust in the air is likely to occur in normal operation occasionally,
- Zone 22 – It is a place where an explosive atmosphere in the form of a cloud of combustible dust in the air is not likely to occur in normal operation, but if it does occur, will persist for a short period only.
An appropriate and adequate selection of a dedusting device is a dificult task which requires experience and specialist knowledge. Our specialists have both the knowledge and experience and they will help you select the best solution to meet your needs.