A trommel screen, also known as a rotary screen or drum screen, is a mechanical screening equipment used to separate materials based on particle size, shape, and density. It is widely employed in various industries, including the pulp and paper industry. In pulp and paper mills, trommel screens are used to remove contaminants and separate remove unwanted elements based on size and shape.
A trommel screen consists of a cylindrical drum with perforations or mesh screens on its surface. The drum is usually inclined and mounted on a frame, with the material to be screened fed into the higher end.
As the drum rotates, the material inside tumbles and slides, allowing the smaller particles to pass through the perforations or mesh while the larger particles and contaminants are retained and eventually discharged at the lower end.
In the pulp and paper industry, trommel screens are used to separate fibers, remove contaminants such as plastic, metal, and other debris, and ensure a consistent fiber size and quality for further processing and paper production.