Compression drying of energy wood

Laurila, Jussi; Havimo, Mikko; Lauhanen, Risto

doi:10.1016/j.fuproc.2014.03.016

Cited by 22 publications

(11 citation statements)

References 4 publications

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“…From the procurement point of view, an unfortunate disadvantage that accompanies storage is also tied to capital (Rauch 2013;Nurmi 2014). Artificial drying ensures a fast supply of fuel chips with the desired moisture content, but it introduces additional process and cost to the supply chain (Laurila et al 2014;Wolfsmayr and Rauch 2014). Studies about the supply systems based on artificial drying of fuel chips have not been published recently.…”

Section: Introductionmentioning

confidence: 99%

Pre-feasibility study of supply systems based on artificial drying of delimbed stem forest chips

Laitila¹,

Ahtikoski²,

Repola³

et al. 2017

Silva Fenn.

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Highlights• With artificial drying and quick delivery, avoiding dry material losses of harvested timber, it could be possible to reduce the current costs of the prevailing procurement system based on natural drying of stored timber at roadside landings.• The maximum cost for the prospective drying process of fresh chips corresponds to, e.g., organization costs or stumpage price of delimbed stems. AbstractThis study was aimed at determining the maximum cost level of artificial drying required for cost-efficient operation. This was done using a system analysis approach, in which the harvesting potential and procurement cost of alternative fuel chip production systems were compared at the stand and regional level. The accumulation and procurement cost of chipped delimbed stems from young forests were estimated within a 100 km transport distance from a hypothetical end use facility located in northern Finland. Logging and transportation costs, stumpage prices, tied up capital, dry matter losses and moisture content of harvested timber were considered in the study. Moisture content of artificially dried fuel chips made of fresh timber (55%) was set to 20%, 30% and 40% in the comparisons. Moisture content of fuel chips based on natural drying during storing was 40%. Transporting costs were calculated according to new higher permissible dimensions and weight limits for truck-trailers. The procurement cost calculations indicated that with artificial drying and by avoiding dry material losses of timber, it could be possible to reduce current costs of the prevailing procurement system based on natural drying of timber at roadside landings. The maximum cost level of artificial drying ranged between 1.2-3.2 € MWh -1 depending on the supply chain, moisture content and procurement volume of fuel chips. This cost margin corresponds to, e.g., organization, forwarding and transportation costs or stumpage price of delimbed stems.

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Section: Introductionmentioning

confidence: 99%

Pre-feasibility study of supply systems based on artificial drying of delimbed stem forest chips

Laitila¹,

Ahtikoski²,

Repola³

et al. 2017

Silva Fenn.

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“…Laurila et al (2014) designed a laboratory scale compression dryer and indicated that compression drying is a fast and effective solution for effective moisture reduction. The lowest moisture content achieved in the study was 30%, which is approximately 7 to 12% above fiber saturation point [26]. A drying curve was also presented, which showed that the moisture content in the dewatered biomass levels out at 30 to 40% moisture even if the pressure is increased [26].…”

Section: Introductionmentioning

confidence: 78%

The Potential for a Pellet Plant to Become a Biorefinery

et al. 2019

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The use of bioenergy has increased globally in recent years, as has the utilization of biomaterials for various new product solutions through various biorefinery concepts. In this study, we introduce the concept of using a mechanical dewatering press in combination with thermal drying in a pellet plant. The purpose of the study is to increase the understanding of the effects a mechanical dewatering press has in a pellet production chain and investigate whether a pellet plant could thus become a biorefinery. The evaluations in this study are based on industrial data and initial tests at the university. The results show that the concept of using the mechanical dewatering press together with a packed moving bed dryer reduces energy use by 50%, compared to using only a packed moving bed dryer. The press water could be used as a raw material for biogas, bioplastics, and biohydrogen. Hence, this study points out the possibilities of a pellet plant increasing the efficiency of the drying step, while moving towards becoming a biorefinery.

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“…In the work [4] it was determined that the quality of drying is influenced by the structural parameters of a drying chamber, but the assessment was made with the measurement of the drying parameters in the drying chamber. In the work [5], the influence of the modes of drying parameters on the quality of drying was defined without coordinating the thermal and the aerodynamic modes of drying of the material. In the work [6], the recommendations on the intensification of the heat exchange in a drying chamber, but without the possibility of their use in the actual operating conditions of the drying chamber, were given.…”

Section: Analysis Of Scientific Literature and The Problem Statementmentioning

confidence: 99%

Development of energy-saving technology maintaining the functioning of a drying plant as a part of the cogeneration system

Chaikovskaya

2016

EEJET

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Compression drying of energy wood

Cited by 22 publications

References 4 publications

Pre-feasibility study of supply systems based on artificial drying of delimbed stem forest chips

Pre-feasibility study of supply systems based on artificial drying of delimbed stem forest chips

The Potential for a Pellet Plant to Become a Biorefinery

Development of energy-saving technology maintaining the functioning of a drying plant as a part of the cogeneration system

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