Material handling solutions for the pulp and paper industry

Kopar's mechanical conveyors reliably transport both raw materials for production processes and ash generated in energy production. The design is always tailored to the material being handled, whether it is fine and dusty matter or hot and abrasive ash.

Screw conveyors are suitable for the transfer of both dry and wet materials. The robust construction of scraper conveyors is particularly well suited to hot and abrasive fractions, such as bottom and fly ash. With wet ash conveyors, the ash is removed from the boiler in a cooled state. Bucket elevators handle the vertical transfer of material between process stages, and cellular wheel and rotary feeders are responsible for precise feeding.

Pneumatic conveying is the most natural choice when the material is fine and dusty, or when it needs to be transferred in a closed system over a longer distance. Typical applications in a pulp and paper mill include the conveying of soda recovery boiler fly ash and the transfer of pigments, fillers and other fine additives from reception to storage silos and further into the process.

Our pressure conveyors move material energy-efficiently and gently on the equipment. Pneumatic conveying is suitable for less abrasive materials and the even feeding of additives. The closed system reduces the spread of dust, improves occupational safety and is generally easy to adapt to an existing facility without significant structural changes.

Cooling is needed above all in the factory's energy production, where the ash generated in combustion must be cooled before transport, storage or further processing. KRC coolers are designed for large volumes of ash, and smaller quantities can be cooled with cooling screw conveyors. The choice of equipment is made according to the volume of ash, the temperature and the boundary conditions of the process.

Efficient cooling does not only make the material safe to handle. A high-efficiency cooler also enables the utilisation of the released thermal energy, which improves the overall efficiency of the plant.

The handling of moist materials often requires a drying phase before they are returned to the process or further utilised. Kopari's drying drums are based on direct drying, where the material to be dried is in direct contact with hot gases inside the drum. This ensures that heat and moisture are transferred efficiently, and the end result remains consistent even when the moisture content of the material varies.

The dryer is utilised when natural sand is used as the bed material of a fluidised bed boiler. The sand is damp upon receipt, and it must be dried before it can be fed into the boiler as bed material.

Crushing and screening solutions ensure the consistency and handleability of the material. Our crushers break down agglomerated and sintered material, and the screens separate the fractions from each other prior to further processing or return to the process.

Our drum screens separate up to three fractions in a single screening pass, enabling, for example, the return of clean bed material to the boiler and the separation of fines for further processing. We also offer other screening solutions according to process requirements.

Both the production process and energy generation require storage in addition to conveyors. We supply silos and tanks along with their associated equipment as part of the same package, keeping responsibility for the system's functionality with a single supplier.

EMJET silo filters keep silo filling and emptying dust-free. Dosing and feeding solutions, such as screw feeders, rotary valves and dome valves, support accurate and repeatable material feeding at various stages of the process. Truck loading equipment also enables controlled material loading when delivering outside the plant.