Current Developments for Efficient Raw Material Supply Procedures Enforcing Cost-Effective Bast Fibre Production in Europe

Gusovius, Hans-Jörg; Paulitz, Jürgen

doi:10.1166/jbmb.2009.1031

Cited by 5 publications

(3 citation statements)

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“…Hemp cropping is still a niche branch in agriculture, and special knowledge as well as special machinery is required [8]. In the last 20 years praxis experiences have shown that a close cooperation of hemp processors with the local farmers is a prerequisite for success in the long-term.…”

Section: Development Of a Model For The Evaluation Of Fibre Processinmentioning

confidence: 99%

Design of Competitive Processing Plants for Hemp Fibre Production

2012

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Despite an annually growing demand for natural fibres accompanied by worldwide increasing fibre prices as well as long tradition and experience in fibre processing, the production facilities for hemp and flax fibres are very limited in Europe. At present, the lack of modern harvesting and economic processing technologies seem to be the greatest obstacles for hemp fibre producers under the changing conditions of international raw material markets. Therefore, detailed investigations of all process stages of hemp fibre processing have been carried out at the Leibniz Institute for Agricultural Engineering (ATB). A novel hemp processing line has been developed, installed, and tested at industrial scale in the last 3 years. Investigations regarding optimum plant layout have shown that a straw throughput of approximately 4 t h −1 is required for economic fibre production for all new processing lines at currently high straw prices of more than 150 C t −1 . Throughputs in the range from 4 to 6 t h −1 showed a favourable relation between profit and investment cost. At throughputs higher than 6 t h −1 , the profit per ton processed straw can be further increased. But investment and straw logistic cost increase at these high-throughput levels often much faster.

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Section: Development Of a Model For The Evaluation Of Fibre Processinmentioning

confidence: 99%

Design of Competitive Processing Plants for Hemp Fibre Production

2012

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“…For the production of hemp fiber, special equipment is required for primary processing of the stems. Their construction comprises an assembly of pairs of rollers (rollers) that perform different technological phases within the primary processing, namely: crushing, breaking the wood part of the stems, separating the wood part [1][2][3]. In order for these equipments to withstand maximum stresses and also to use optimal materials consumption in the construction of the equipment, it is necessary to carry out a dimensional analysis of the components subjected to maximum effort with the FEA method [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Constructive optimization by method of finite element analysis of hemp fibre processing equipment

Olan

Zaica

Păun

et al. 2020

19th International Scientific Conference Engineering for Rural Development Proceedings

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Finite element analysis (FEA) is a computerized method for predicting how a product reacts to realworld forces, vibration, heat, fluid flow, and other physical effects. Finite element analysis shows whether a product resists under the working conditions, wears out, or works the way it was designed. Hemp fibre is a natural renewable material used in important areas of industry. The primary processing is performed on special equipment that ensures hemp fibre processing. In this study, the structural analysis module will be used for static analysis (resistance checking) and modal analysis (frequency analysis or calculation of a number of structure's own frequencies) for the important assemblies. The pressing and crushing rollers, their spindles and bearings and the frame (machine frame) of the hemp fibre processing equipment are analyzed and verified constructively and functionally. The results obtained are used in redesigning the equipment. Thus, it is expected that the new design of the hemp fibre processing equipment will have better performance in terms of metal consumption, energy efficiency and the quality of the obtained products. The equipment comprises a system with 8 pairs of processing rolls, and a vibrating system for separating the pieces from the remaining stems in fibre. The work is aimed at checking the dimensioning and the resistance to the efforts by the method of the finite element analysis (FEA) both for the construction of the rollers and the support frame.

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“…The crop which directly follows hemp in the rotation circle produces up to 30% higher yields in comparison to rotation systems without hemp (FNR 1997;Desanlis 2006;Naumenko 2006). Core issues of fiber plant cultivation (Mastel et al 1998;Bócsa et al 2000;Von Francken-Wels 2003;Eerens 2003;Burczyk et al 2009) and suitable harvesting methods (FNR 1997;Bassetti et al 1998;Venturi et al 2007;Gusovius and Paulitz 2009) have been solved satisfactorily during the past few years.…”

Section: Introductionmentioning

confidence: 99%

Wet Processing of Hemp: An Overview

Idler

Pecenka

Fürll

et al. 2011

Journal of Natural Fibers

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Normally, the production of fibers from agricultural fiber crops is based on field drying and retting of plant straw. As weather conditions at the usual harvest time are often problematical for harvesting and retting, the development of weather-independent supply chain technologies is very important. The weather risk can be avoided, if, e.g., hemp after being harvested with a conventional forage harvester is directly processed to final products, or stored by wet preservation. Furthermore advantageous is that the whole plant material without any loss is processed to final products like fiber boards, insulation materials, or fibrous materials for natural fiber reinforced composites. Especially for this purpose a pilot plant has been built up and is tested till present. The investigations have shown that conventional technologies of ensiling are capable for the preservation of hemp for more than one year.

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Current Developments for Efficient Raw Material Supply Procedures Enforcing Cost-Effective Bast Fibre Production in Europe

Cited by 5 publications

References 0 publications

Design of Competitive Processing Plants for Hemp Fibre Production

Design of Competitive Processing Plants for Hemp Fibre Production

Constructive optimization by method of finite element analysis of hemp fibre processing equipment

Wet Processing of Hemp: An Overview

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