Comminution of biogenic materials

Eisenlauer, Moritz; Teipel, Ulrich

doi:10.1002/cjce.22792

Cited by 14 publications

(29 citation statements)

References 13 publications

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“…Based on the authors' own research, it was found that the angular speed of the discs and, consequently, the linear speed of the grinding blades, have a significant influence on the values of the integrated energy consumption of the preliminary process.Acquiring energy from biomass requires its earlier preparation: drying, grinding, palletizing, etc. [7]. These procedures require certain energy inputs (costs) which significantly decrease the energy and environmental balance in the entire lifecycle of the energy material (wood, grain biomass, etc.)…”

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confidence: 99%

The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

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The assessment of engineering objects in terms of energy consumption is an important part of sustainable development. Many materials, including those from the energy sector, need to undergo earlier processing, e.g., grinding. Grinding processes still demand a significant amount of energy, whereas current energy assessment methods do not take into account important parameters of the process, which makes it difficult to choose their optimal values. The study presents the analysis, testing, and assessment of mechanical engineering systems in terms of the energy consumption involved in the grinding of biomass intended for energy production purposes. A testing methodology was developed to improve the parameters of multi-disc grinding, including the reduction of energy consumption, power input, product quality improvement, and process efficiency. An original model of integrated energy consumption was developed. Tests were carried out on a five-disc grinder for five programs to assess the programmable angular speeds of the grinder discs. Output values, including specific energy demand, fragmentation degree, and integrated energy consumption, were assigned to each testing program. The test results were subjected to statistical analysis. Based on the authors' own research, it was found that the angular speed of the discs and, consequently, the linear speed of the grinding blades, have a significant influence on the values of the integrated energy consumption of the preliminary process.Acquiring energy from biomass requires its earlier preparation: drying, grinding, palletizing, etc. [7]. These procedures require certain energy inputs (costs) which significantly decrease the energy and environmental balance in the entire lifecycle of the energy material (wood, grain biomass, etc.) [8][9][10][11][12][13]. According to the idea of sustainable development concerning the design of systems, devices, and processes, in three areas-the environment, society, and economy-the biomass processing lines should be characterized by the lowest possible energy consumption and environmental impact [14,15]. It also aims to improve the competitiveness of biomass fuels in relation to conventional fossil fuels [16,17].Before being used for energy purposes, energy media need to be properly prepared, e.g., their dimensions need to be reduced by means of grinding [2]. Roller, drum, ball, hammer, and disc mills are used to grind granular biomaterials (biomass grains) [7,18]. Tests have shown that the best relations between product quality, yield, and grinding energy consumption occur for hammer and disc mills [2,7]. The quality of the grinding product is most often determined by the grinding degree, which is defined as the ratio of the characteristic dimensions of the particles before and after size reduction [19,20]. Other indicators, e.g., bulk density, grain size distribution, specific surface area, energy value, and their relationship with the comminution process, are also important from the point of view of the final product quality [4,[21][22]...

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The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

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“…To better address how and if further parameters are relevant in the complex topic of comminution of renewable resources, further studies are required. minimal Martin diameter x 16 [mm] characteristic particle size value x 50…”

Section: Discussionmentioning

confidence: 99%

“…This is not necessarily related to the type of main stress. Other studies, conducted with the same raw material but other types of hammer mill construction, obtained contradictory results [16]. Therefore, it can be assumed that the design of the mill has a strong influence on the fineness of the comminution product.…”

Section: Particle Size Analysis Of the Comminution Productsmentioning

confidence: 97%

Comminution of Wood – Influence of Process Parameters

Eisenlauer

Teipel

2020

Chem Eng & Technol

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An essential element for sustainable use of renewable resources is an efficient comminution process for which the relation between energy input and size reduction is of great importance. Fine comminution of beech, oak, and spruce wood chips in cutting and hammer mills at different moisture content levels is investigated. The influence of the different process parameters as well as the size reduction performed by the hammer and cutting mill on the specific comminution energy is reported and the particulate properties of the comminution products are reported. Considering the energy requirements, functional relations were derived from the experimental results, which describe the relation between comminution energy and size reduction.

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“…Der Wassergehalt von Holz hat bei der Zerkleinerung den signifikantesten Einfluss auf die für die Zerkleinerung benötigte Energie [19,20]. Der Wassergehalt von Holz hat bei der Zerkleinerung den signifikantesten Einfluss auf die für die Zerkleinerung benötigte Energie [19,20].…”

Section: Introductionunclassified

“…Des Weiteren liefert die Hammermühle bei allen Versuchen ein breiter verteiltes Produkt im Vergleich zur Schneidmühle. Diese starken Einflüsse des Mühlentyps zeigte sich auch bei Arbeiten mit anderen holzartigen Materialien[19,20].Im Rahmen der Arbeit wurden zusätzlich die Ergebnisse der zwei unterschiedlichen Arten der Charakterisierung, Siebanalyse und dynamische Bildanalyse mittels eines Camsizers, verglichen. Die Ergebnisse zeigen, dass entscheidend ist, welche Kenngrößen der dynamischen Bildanalyse mit dem Ergebnis der Siebanalyse verglichen werden.…”

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Process Technology for Waste Wood Processing

Eisenlauer

Graf

Teipel

2018

Chemie Ingenieur Technik

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In den letzten Jahren hat die Nutzung nachwachsender Rohstoffe stark zugenommen. Um die Nachfrage decken zu können, müssen neue Rohstoffströme erschlossen, aber auch die Prozessschritte bei der Nutzung dieser in ihrer Effizienz gesteigert werden. Altholz bzw. Recyclingholz stellt einen bis heute wenig genutzten Rohstoffstrom dar. Ein wesentlicher Aspekt bei der Nutzung dieser Rohstoffe ist die Zerkleinerung. In dieser Arbeit wurde Recyclingholz in einer Hammerund einer Schneidmühle zerkleinert. Dabei wurde der Einfluss von Prozessparametern und des Rohstofftyps auf die Zerkleinerungsenergie und die Zerkleinerungsprodukte untersucht.In recent years the use of renewable raw materials has been gaining increasing importance. Therefore, new resource flows have to be developed and the process steps in the utilization chain need to be increased in their efficiency. Waste wood or recycled wood is still little used today. The upstream process of comminution is a key element in the usage of these materials. This work focuses on their comminution in a hammer and cutting mill. The influence of process parameters and the quality of the raw material on the comminution energy and the comminution products were investigated.

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Comminution of biogenic materials

Cited by 14 publications

References 13 publications

The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

The Integrated Energy Consumption Index for Energy Biomass Grinding Technology Assessment

Comminution of Wood – Influence of Process Parameters

Process Technology for Waste Wood Processing

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