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RISS 인기검색어
- 검색키워드
- 주제어 : wood particle drying (검색결과 2 건)
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Energy Efficiency of Fluidized Bed Drying for Wood Particles
Yonggun Park,Yoon Seong Chang,Jun Ho Park,Sang Yun Yang,Hyunwoo Chung,Soo Kyeong Jang,In Gyu Choi,Hwanmyeong Yeo 한국목재공학회 2016 목재공학 Vol.44 No.6
This study evaluates the economic feasibility of industrializing fluidized bed dryer for wood particles. The theoretically required heat energy and energy efficiency were evaluated using a pilot scale fluidized bed dryer. When Mongolian Oak wood particles with 50% initial moisture content were dried in the fluidized bed dryer with air of 70℃ air circulating at 1.1-1.3 m/s for 30 minutes, the total theoretically required heat energy was 2,177 kJ. Of this, 1,763 kJ (approximately 81.0%) was used to heat the air flowing in from outside the dryer and 386 kJ (approximately 17.7%) was used to heat and remove water from the wood particles. Actual energy consumed was 7,560 kJ, giving energy efficiency of 28.8%. Thus, to industrialize a drying method such as fluidized bed drying, where the dryer volume is significantly larger than the volume of wood particles, it is necessary to minimize energy loss and maximize energy efficiency by designing the dryer size considering the amount of wood particles and choosing a suitable air circulation rate.
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벌크향상제의 주요 물성에 따른 백판지의 벌크와 건조에너지 평가
이지영(Ji Young Lee),김철환(Chul Hwan Kim),김은혜(Eun Hea Kim),박태웅(Tae Ung Park),조해민(Hae Min Jo),성용주(Yong Joo Sung) 한국펄프·종이공학회 2017 펄프.종이기술 Vol.49 No.2
In this study, we investigated the properties of wood powders (WPs), which are used in the Korean duplex board industry, and determined their effect on the bulk and the drying energy requirement of paperboard. Three types of WPs were collected; their chemical compositions were analyzed, and the physical properties, including particle size and distribution, particle shape, and zeta potential, were measured. Handsheets containing the WPs were then made, and the physical properties and drying energy requirement were determined. The chemical compositions of the WPs were similar to the composition of common softwood and hardwood, except for the ash content. This suggests that papermakers must monitor the ash content of the WPs carefully. The particle size and distribution, and the particle shapes showed the regularity of WP particles. The three types of WPs improved the bulk and reduced the strength of the handsheets. The WP containing the largest and the most regular particles was the most effective at improving the bulk and reducing the drying energy requirement. Therefore, the particle size and distribution in the WP are the most important properties to obtain the desired benefits in a duplex board mill.
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