The number of types of purification equipment today is counted in dozens. Let’s consider the main types of installations that have proven themselves in industry as devices for neutralizing harmful impurities and removing particles of large, medium and fine dispersion.
One of the most effective dry air cleaners is the bag filter. As the name implies, the basic filtering element in this design is the so-called “bag”, made of non-woven material.
Non-woven materials, having microscopic pores (unattainable in size for weaving machines), are able to trap a wide range of dry dust particles, from 0.1 to 100 micrometers.
These are the most efficient dry air purification systems with a retention rate of up to 99.99%. However, in order to achieve such performance, it is strongly recommended to install a coarse dust pre-cleaning stage, such as a cyclone, upstream of this unit.
Inertial vortex cyclone of dry operation
One of the most common, accessible and inexpensive methods of air purification is a cyclone filter. In complex systems, this unit is installed as a primary dust separation barrier of medium and large particle size.
The physical principle of cyclone operation is simple. It represents a hollow conical cylinder, the upper part of which, tangentially to the housing, is fed with contaminated air flow.
Colliding with the inner walls of the case, dust particles (ash, shavings, air suspensions, grinding substrates) lose kinetic energy and “roll” down by gravity into the sump. The cleaned flow swirling goes out along the cyclone axis to the upper outlet pipe. The air can both return to the production room (recirculation) and leave the production area free to escape into the environment.
The ventilation system shows itself perfectly in many industrial plants: woodworking, food production, mining. The only disadvantage of these models of air cleaners is the high hydraulic resistance of the system, which leads (in the absence of proper lining of the housing) to increased wear and tear of the internal cavities of the unit, and sometimes to excessive heat, reducing the mechanical resistance of the device.
Industrial Aspiration Systems
Such systems are complete air cleaning complexes, designed for specific production areas. They include not only purification units, but also complete communication of all workplaces with the main purification unit (cyclone, scrubber, filter) – through a branched network of ducts. They can be completed with additional equipment depending on the Customer’s requirements to the level of decontamination, dedusting, and deodorization of the premises.