What should you know about our FD cyclones for wood chips?


Wood chips is a problem that every wood processing plant needs to face with. These small particles of wood that hang in the air are not only a threat to human health but their accidental ignition may lead to an explosion. That is why it is so important to clean the air from such particles. For this puprose our FD cyclones are used. What should you know about them?

How do cyclones work?

A dedusting cyclone is one of the simplest solutions for industrial dust collection. They are in a form of a cylinder with a cone shaped base and they work in the following way:

  • polluted air with particles of dust etc. comes through a duct or pipe into the top part of a cyclone,
  • the air is brought into a rotational movement by the pressure created by the working fans,
  • due to the centrifugal force, the particles of dirt which are heavier than air are thrown out of the rotating stream of air,
  • the thrown particles hit the internal wall of the cyclone, lose their speed and fall down the cone hopper of the cyclone uderzając w wewnętrzną ścianę komory cyklonu, cząsteczki tracą swoją energię kinetyczną i pod wpływem grawitacji opadają do stożkowego leja.

The air cleaned from the particles is directed out of the cyclone chamber into the outlet. The caught dust and particles are removed from the cyclone and disposed of in an appropriate way. Cyclones can work both in negative pressure or in overpressure, however in the first case it is neccessary to add a rotary valve, a separator or a tight tank.

How are cyclones constructed?

They are made of 2 mm and 3 mm thick black steel. The main part, the cylindrical body consists of 2 – 4 elements bolted together. Each cyclone is equipped with a pair of fans for providing adequate pressure of the air stream and flow direction, and also with an inspection door. The FD cyclones are available in many options which differ from one another by their size (height and diameter), and their air cleaning efficiency. The efficiency is provided in cubic meters of air, which a cyclone is able to clean within one hour. The most efficient cyclone is the FD-2500, with efficiency of 62 500 m3/h.

Depending on the size of a cyclone, they consist of two, three or four parts that are combined together. Each cyclone is equipped with an inspection door located on the cone (the lower part), and as standard, our cyclones are painted in blue RAL 5015, with other colours avilable upon former request.

Where are cyclones used?

Cyclones are used in various plants specializing in wood processing, as well as for dedusting air out of various gradation and fiber dusts, not only sawdust. Cyclones can be used as independent dedusting devices or as initial separators. In the second case, their task is to separate bigger particles of dirt before the main filtration performed by a filter bag dust collector. It is also possible to use cyclones as discharging devices in pneumatic transport systems.