Displaying items by tag: dewatering

Gardner Denver Nash Germany supplied the complete vacuum system for dewatering in the forming and press sections of the new PM7 paper machine in Dunaujvaros. This technology has already proven itself in every other paper machine within the Hamburger Group, with robustness, efficiency and flexibility that guarantee the highest operational reliability.

On the new PM7 in Dunaujvaros, nine NASH 2BE3 vacuum pumps are used. Each pump is driven by a motor equipped with a frequency converter, allowing the rotational speed to be set to exactly suit the actual process conditions. This causes the vacuum pressure to adapt to process conditions as well. Additionally, three centrifugal fans for the low-vacuum scavenge points in the forming section have been included. As a result, the vacuum system provides the greatest flexibility at optimum efficiency.

For the plant operator, the advantages of a NASH liquid ring vacuum system were obvious:

• An extremely robust system: overload safe and resistant to process failures
• Very high overall efficiency, particularly in conjunction with optimum control
• Optimum felt dewatering through the volumetric operating principle of the liquid ring vacuum pump - the scavenge pressure adjusts automatically to suit the felt permeability
• Scavenge-side liquid carry-over with low fiber content is not a problem for the NASH pumps
• Rotation speed control offers the potential of high energy savings
• Low specific power requirements
• Low noise emissions due to low peripheral speeds of the vacuum pump
• Future system adaptation, without influencing other scavenge points, is easily done by changing the rotation speed of individual vacuum pumps
• High operational safety, even if individual vacuum pumps are deactivated
• Very low service and maintenance costs

Confidence in more than 100 years of know-how accumulated by the market leader in the paper industry
With the decision to use NASH vacuum pumps, the plant operator also made a decision for an innovative, environmentally friendly and economical attractive solution.

Contact:
Nash –Zweigniederlassung der Gardner Denver
Deutschland GmbH
Marketing
Wolfgang Kraft
Phone: +49 (0)911 / 1454-7771
Fax: +49 (0)911 / 1454-7777
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Following the rebuild of the wet section of paper machine PM4 at Cartiere Modesto Cardella S.p.A., Italy, by international technology Group ANDRITZ, the PrimeFlow TW two-layer headbox with PrimeProfiler F dilution water control, and the first PrimeForm TW gap former to be supplied by ANDRITZ PULP & PAPER have gone into operation successfully.

The concept ANDRITZ has supplied provides high dewatering performance and production of corrugated base paper grades with a minimum of two-sidedness. Initial results after production start showed a significant improvement in paper formation and strength properties. The paper machine has a design speed of 1,200 m/min and a wire width of 3,180 mm; the corrugated base paper, with a basis weight range of 90 to 170 gsm, is produced from 100% waste paper.

Thanks to the presence of the ANDRITZ experts on site, the rebuild went very smoothly. All systems have been started up successfully and we are very pleased with the components ANDRITZ has supplied', says Modesto Cardella, Managing Director of Cartiere Modesto Cardella.

For further information please contact:
Oliver Pokorny
Group Treasury, Corporate Communications & Investor Relations
Phone: +43 (316) 6902 1332

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The ANDRITZ GROUP is a globally leading supplier of plants and services for the hydropower, pulp and paper, metals, and other specialized industries (solid/liquid separation, feed and biofuel). The Group is headquartered in Graz, Austria, and has a staff of approximately 13,000 employees worldwide. ANDRITZ operates over 120 production sites, service and sales companies all around the world.

ANDRITZ PULP & PAPER is a leading global supplier of turnkey systems and services for the production of all types of pulp, paper, tissue paper, board, fiber-board (MDF), nonwovens, as well as of biomass boilers and gasifiers for energy production. The technologies available are employed for the processing of logs and annual fibers, the production of chemical and mechanical pulps as well as recycled paper fibers, recovery and reuse of chemicals, generation of energy from biomass, preparation of paper machine furnish from virgin or recycled fibers, production of paper, tissue paper and board, calendering and coating of paper, and the handling of reject materials and sludges. Services include complete mill maintenance, equipment upgrades and rebuilds, engineered wear products, and spare parts.