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Pulping

The best-fit technology for each resource

    Pulping is the first step in the papermaking process, with the purpose of producing a clean fiber suspension that can be pumped forward in the process. Fibers from virgin pulp, recovered paper or paper machine broke are mixed, i.e., pulped, with water to form a suspension inside the pulper. The optimal pulping technology is selected depending on the type of furnish, production output and the contaminants in the furnish. Pulping systems for recovered paper not only disintegrate the paper and board into single fibers but also remove large non-fiber components (rejects), such as plastics or glass.
     

    In order to avoid breaking the rejects into too small pieces, it is important for the pulping process to find a balance between the main parameters, such as pulping consistency, temperature, retention time and chemical additives. A low amount of rejects in the pulp makes the downstream process easier and more efficient to operate.

     

    The right machine for every task

       
        Benefits Process
      IntensaDrum

      High production

      Easy operation

      Drum pulping for recycled fibers

      IntensaPulper

      Flexibility

      Low energy demand

      Pulping of all kinds of paper and fiber material

      Contaminex

      High reliability

      Pulper cleaning

      IntensaMaXX

      High efficiency

      High reliability

      Pulper cleaning

      IntensaScreenDrum

      Low fiber loss

      Reject washing

      CompactPulper

      Low energy demand

      Small footprint

      Broke pulping for paper machine

      Ragger

      High reliability

      Pulper cleaning

      Your contact for Pulping

      Product range

        IntensaDrum

        Outstandingly reliable and efficient pulping

        IntensaDrum is a machine for efficient pulping of stock consistencies up to 18% and for gentle and effective separation of fibers and contaminants.

        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.

        Discover IntensaDrum via Augmented Reality

        To discover the IntensaDrum pulping drum and its multiple features in Augmented Reality, download the app to your tablet or smartphone and print out the IntensaDrum brochure below. Scan the picture on the front page of the brochure with the camera of your mobile device, and enjoy the interactive functions.

        Environment. Quality. Reliability.
        IntensaDrum is a BlueLine product

        The BlueLine product range from Voith comprises modern machines and products for stock preparation that are characterized above all through the efficient use of energy and other raw materials and by gentle treatment of the fibers.

        Discover the innovation blueline

        BlueLine Advantages

        Lower Maintenance Cost

        Conventional drum pulping systems generate maintenance costs up to 20,000 €. Due to the non-contact labyrinth sealing, the machine offers a wear-free inlet chute. As a result, IntensaDrum is nearly maintenance-free.

        Enhanced Safety

        Access to the drum of IntensaDrum can be secured by interlocking doors. The open reject outlet guarantees a safe entry of the drum.

        IntensaPulper

        Efficient pulping of recovered paper and pulp bales in stock preparation

        IntensaPulper facilitates efficient pulping of fibers from virgin pulp, recovered paper or paper machine broke in stock preparation.

        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.


        Environment. Quality. Reliability.
        IntensaPulper is a BlueLine product

        The BlueLine product range from Voith comprises modern machines and products for stock preparation that are characterized above all through the efficient use of energy and other raw materials and by gentle treatment of the fibers.

        Discover the innovation BlueLine

        BlueLine Advantages

        Higher Runability

        A strong seal and stable drive reduce maintenance intervals to a minimum.

        Lower Energy Consumption

        The flow-optimized vat design, in combination with the eccentrically arranged rotor, produces intensive turbulence. This results in improved mixing at a lower energy input.

        Contaminex

        Pumping of highly contaminated stock flows

        Highly contaminated stock flows in the pulping system for recovered paper can only be pumped reliably and largely free of blockages using a special pump. Whether in LC or HC system, Contaminex pumps the critical contaminants to the next machine very reliably in both systems, TwinPulp and PreClean.

        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.

        Your benefits with Contaminex

        • High capacity and maximum efficiency due to frequency converter and variable rotor speed
        • Robust operation and high reliability thanks to low sensitivity for air and reject contents
        • Easy maintenance thanks to simple design and long service-life due to wear resistant rotor

        IntensaMaXX

        <BR>

        Reliable reject discharge without spinnings

        The particular orientation of the rotor-screen unit on the top of the asymmetrically shaped tank ensures that no vortices can form inside IntensaMaXX. Development of spinnings is thus successfully counteracted, and even maximum contaminant contents are not a problem. Reject discharge in a downward direction ensures reliable removal of contaminants. IntensaMaXX with rotor type B is available for high levels of contaminants; rotor type S is available for hard-to-pulp raw materials.

        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.

        ENVIRONMENT. QUALITY. RELIABILITY.

        IntensaMaxx is a BlueLine product

        The BlueLine product range from Voith comprises modern machines and products for stock preparation that are characterized above all through the efficient use of energy and other raw materials and by gentle treatment of the fibers.

        Discover the innovation blueline

        BlueLine Advantages

        Higher Runability

        The asymmetrical housing prevents spinnings and every type of ragger formation. 

        Lower Maintenance Cost

        The arrangement of the rotor screen unit at the top of the machine reduces wear.

        IntensaScreenDrum

        Efficient washing for minimum fiber loss

        IntensaScreenDrum is a new development based on many years of rich pulping system experiences. The internal spray pipe with newly developed water nozzles keeps the reject almost fiber free and reduces the water and power consumption at the same time. Using lower water pressure than conventional spray pipes makes a significant improvement for the water pumps.

        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.

        ENVIRONMENT. QUALITY. RELIABILITY.
        IntensaScreenDrum is a BlueLine product

        The BlueLine product range from Voith comprises modern machines and products for stock preparation that are characterized above all through the efficient use of energy and other raw materials and by gentle treatment of the fibers.

        Discover the innovation blueline

        BlueLine Advantages

        Reduced Fiber Loss

        The fiber loss is minimized thanks to optimized retention time and 3D shower nozzles.

        Enhanced Safety

        Thanks to a closed hood there is almost zero water spray and deposits in the surrounding equipment, thereby improving the cleanliness of the pulper area.

        CompactPulper

        High operating efficiency with broke pulping

        The CompactPulper ensures reliable pulping of broke through improved rotor contact and a higher circulation rate. Thanks to its narrow and compact design, the CompactPulper requires minimal space and is used with couch and press broke and with dry broke at a pulping consistency between 3% and 6%.

        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.

        Your benefits

        • Low space requirement thanks to slim and compact design
        • Low energy consumption
        • Up to 40% more pulper working width for the same installed power
        • Easy assembly

        Ragger

        Effectively removing spinning contaminants

        The Ragger from Voith offers high efficiency to remove the wires and spinning contaminants from the pulping process. The ragger is mainly used for brown packaging paper grades from recovered paper, but it can occasionally be used for white paper grades too. For virgin fibers there is no need for a ragger since there is no large spinning rejects in the raw material.

        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.

        Your benefits

        • Improved safety for personnel and machines thanks to automatic operation and easy adjustment
        • Robust and reliable removal of spinning material from pulper thanks to maximum profile contact
        • Forward and reverse transport possibilities for perfect positioning

        Your contact – How can we help you?

          LC Pulping

          Wolfgang Müller

          Product Manager

           

          t +49 751 83 3268

          Drum pulping, HC pulping, broke pulping

          Pierre-Haakon Berger

          Product Manager

           

          t +49 751 83 2213

          Engineered for success

            522
            drum screen installations
            185
            IntensaMaXX installations
            424
            Contaminex installations
            267
            IntensaPulper installations
            Since recovered paper, bales and many contaminants make the pulping process in stock preparation more difficult, a robust process and resistant machines are essential in pulping. An investment in the Intensa family from Voith is particularly worthwhile, as Voith combines robustness with low energy consumption and fiber loss.
            Wolfgang Mueller, Global Product Manager

            Profit from proven Voith quality

              With the innovative BlueLine product line, customers profit from proven Voith quality in stock preparation and at the same time lower costs for the resources used.

              Servolution. Service at the next level

                At Voith, the success of the customer takes center stage. Service means delivering customized service solutions and utilizing our full expertise to help our customers reach their goals.

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