During loading of the belt, air is both displaced and simultaneously induced. Most transfer points are not properly designed for this. As a result, the air speed in the transfer point increases considerably, and the resulting ‘storm’ picks up fine particles from the material stream. This creates enormous amounts of dust. The airborne dust is blown out through all available openings, with all the associated consequences.
The DusTek dust control programme focuses on reducing and controlling the air velocity within the transfer point. We do this by using an active (extraction) and a passive method. In practice, it is often a combination of both methods.
Knowledge and experience of both conveyor belt and dust control technology
TBK Spillage Control has years of practical experience in both conveyor belt systems and dedusting systems. Based on this expertise, our people are able to assess, reduce and control the volume of air that passes through a conveyor belt transfer point.
Special spot filter for the transfer point
The DusTek spot filter is a compact filter, specially designed for installation at a conveyor belt transfer point.
Thanks to its integrated reverse jet cleaning system, the filter can operate 24 hours per day without interruption. The modular construction of the filter allows maximum flexibility in set-up, filtration area and suction flow rate.
The filter is equipped with convenient 700 or 1000 mm long filter elements. These can easily be replaced from the side of the transfer point. Naturally, DusTek can be built in compliance with ATEX 114 (directive 2014/34EU) for use in zone 22.
A combination of active and passive dust control
Passive dust control measures limit the amount of air that is induced along with the material flow during loading and reduce the air velocity in the transfer point As a result, a relatively small spot filter is sufficient to reduce the air velocity further to below the critical value.
In addition, the transfer point must be provided with an effective seal and the impact zone must be sufficiently supported. Sufficient length of the transfer point is important to ensure that the remaining amount of swirling dust can settle on the material stream. The material stream then leaves the transfer point free from any clouds of dust.