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Water circuit optimisation to reduce the specific effluent volumes and solids losses in the production of specialty papers

Description: Das Projekt "Water circuit optimisation to reduce the specific effluent volumes and solids losses in the production of specialty papers" wird vom Umweltbundesamt gefördert und von Papiertechnische Stiftung München durchgeführt. Background / Problem area: Taking a look at individual grades and product groups shows that in the year 2004 the highest specific effluent volumes in the German paper industry occurred in the production of specialty papers. The absolute amounts of effluents and their variation limits clearly indicate optimisation potentials among the producers of specialty papers. This assumption is supported by specific values obtained through surveys. Due to the use of special and partly expensive raw materials for specialty papers, the narrowing of water circuits and the reduction of solids losses into the waste water opens up sizable saving potentials. Objective / Research results: The project aims at reducing the effluent volumes whilst increasing the raw materials utilization in the production of specialty papers through the optimisation of water circuits. The production processes of four specialty paper facilities were characterised by determination of analytical parameters, flows of fresh-, circuit- and waste water and further production related data. The evaluation was conducted by means of tools worked out in former projects. With the help of simulation models the consequences of circuit narrowing on the loading of water circuits were determined. Action plans for the reduction of solids losses, fresh water consumption and for the load relief of paper machines were presented to the mills. Numerous optimisation measures could be proposed for all mills examined in the project. In one mill, for instance, it could be shown that it is possible to durably reduce the specific effluent volume by about 35 percent. Regarding solids losses a permanent reduction of 15 to 20 percent can be achieved. All in all reduction potentials between 40 percent and 64 percent were identified for specific effluent volumes. The savings potential for solids losses was in the range of 21 percent and 84 percent. In order to reduce solids losses, it is essential to avoid undesigned overflow of chests and ensure a good quality of the clarified water. For the relief of save alls and improvement of clear water quality a design arrangement was worked out where water flows with high solids loads are held back in the constant part. Target values were defined for the amounts of solids lost at cleaners and through overflowing clarified water. It could be confirmed that the K-value theory, which was set up for other paper grades, is applicable to the production of specialty papers as well. The same is true for the volume analysis, which evaluates buffer volumes. Finally the results of the research project presented here were combined with those of the research projects AiF 9584 (recovered fibre), AiF 10860 (wood containing) and AiF 13093-N (wood free). The applicability of the developed examination and evaluation tools was compared, and target values of different paper grades were set against each other. usw.

Types:

SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: München ? Arsen ? Papierindustrie ? Pflanzensamen ? Überschwemmung ? Abwasserminderung ? Papier ? Schadensminderung ? Süßwasser ? Verfahrensoptimierung ? Wasserverbrauch ? Rohstoff ? Abwasser ? Rechtsschutz ? Bewertung ? Daten ? Simulation ? Umwelttechnik ? Wasserqualität ? Wasser ? Mühle ? Minderungspotenzial ? Stückgut ? Rohstoffnutzung ? Aktionsplan ? Geländerelief ? Forschungsprojekt ? Produktdesign ? Geomorphologie ? Kenngröße ? Volumenreduktion ? Kennzahl ? Zielwert ? effluent Volume ? Water circuit ? solids loss ?

Region: Bayern

Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

Time ranges: 2004-01-01 - 2005-12-31

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