Pulping

Voith's IntensaDrum drum pulper consists of one pulping section and one screening section. In the pulping zone, special lifting bars lift the pulp suspension from the bottom and almost to the top. From there, the suspension falls back onto the drum shell. This process is very gentle since there is no rotor to crush or cut the contaminants.

In the sorting zone of IntensaDrum, the suspension is lifted in the same way, and water is added via spray pipes to wash out the fibers through the perforated drum shell. In this way, an efficient separation of fibers and contaminants already takes place inside the pulping process, without damaging the contaminants.

The simple and basic principle of IntensaDrum leads to low maintenance and increased runtimes. Due to its high consistency range, IntensaDrum has a low specific energy consumption, and the lack of wear parts gives a constant accept quality.

The Intensa technology from Voith offers quick and intensive mixing of the suspension in the pulper. The flow-optimized pulper vat, in combination with the eccentrically arranged rotor, generates a perfect turbulence. As a result, quicker mixing of the suspension and accelerated bale intake are achieved. The double-coned bottom of IntensaPulper creates a flow-optimized transition from the pulper bottom to the cylindrical trough wall.

IntensaPulper IP-R is specifically designed for the pulping of recovered paper at a high pulping consistency. The rotor configuration ensures a reliable ragger operation, and the number of ragger breaks can be reduced to once a month. The double-coned bottom combined with the baffle urges the coarse heavy contaminants towards the reject discharge allowing a reliable removal in the Junkomat.

IntensaPulper IP-V enables efficient pulping of virgin fibers, clean recovered paper or broke in batch or continuous mode. A bale breaker divides the bales and thus contributes to an increase in production capacity. A trap for heavy parts ensures the separation of wires.

IntensaPulper from Voith achieves a significant increase in production capacity, while keeping the pulping quality consistently high. Significant energy savings of up to 25% are obtained in comparison to conventional low consistency pulpers, thus high cost savings can be achieved.

Featuring large nozzle diameters and a free-flow impeller, Contaminex is designed for plug-free pumping of stock flows with a high proportion of contaminants. The impeller has a long service life thanks to its hard facing. A frequency converter offers the possibility for optimized pump speed and reduced energy consumption for intermittent pumping operation.

IntensaMaXX can be used in continuous low consistency (LC) pulping with recovered paper grades containing contaminants or in high consistency (HC) pulping as a dumping machine after the batch HC pulper.

The hood of the IntensaScreenDrum has been redesigned to minimize water vapor and droplets forming on pipes and handrails, keeping the surrounding area clean and safer for the operators.

The reject is purged by intermittent flushing from IntensaMaXX to the IntesaScreenDrum, where it is washed to recover all useable fibers. The internal 3D water spray ensures that all the plastic reject is washed efficiently. By adjusting the water jet, one can optimize the retention time for reject washing, depending on specific conditions for each raw material, system and customer.

An effective agitation with low vat height, together with an intensive rotor contact results in a higher circulation rate providing a more intensive pulping with simultaneous low energy consumption. The CompactPulper is available with one to four pulping units per pulper vat and with a width of up to 12 meters. Each pulping unit provides an electrical power of between 55 and 900 kW.

The wires are necessary for the transportation of paper bales, but expensive to remove before the pulper itself, especially for production lines with high production. The Ragger is a simple tool to remove the wires during pulping in order to make sure no steel wires are broken down by the rotor and cause excessive wear on valves and pumps.

Combined with the rotor from the IntensaPulper the number of broken ragger ropes can be reduced to a minimum. Strong ribs on the pulling wheel prevent slippage. The direct drive equipped with an electrical brake in combination with fixed wheel positions guarantee maximum contact.

Equipped with a 1.1 kW motor, it has 1.6 tons of tractive force. Forward and backward transportation of the ragger is possible with push-buttons. The high gear-ratio allows an intermittent speed control from 10 to 300 m/h.