보고서 정보
주관연구기관 |
국립식량과학원 National Institute of Crop Science |
보고서유형 | 최종보고서 |
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2014-02 |
과제시작연도 |
2011 |
주관부처 |
농촌진흥청 Rural Development Administration(RDA) |
등록번호 |
TRKO201400011032 |
과제고유번호 |
1395021229 |
사업명 |
국책기술개발 |
DB 구축일자 |
2014-07-05
|
DOI |
https://doi.org/10.23000/TRKO201400011032 |
초록
연구개발결과
○ 다년생 작물인 ‘거대1호’ 등 억새류 4종의 4년간 생육특성 및 수량성 확인
○ 억새 등 초본류 펠릿성형 불가능 요인 극복 및 거대억새 펠릿 성형시스템 개발
- 연구결과를 반영한 억새 전용 펠릿 성형기(200㎏/시간) 제작
○ 억새 펠릿의 연소시 클링커 발생양상 분석 및 석회 혼합을 통한 저감 방법 제시
○ 펠릿보일러의 장단점 분석을 통한 거대억새 연소 최적 보일러 개발
Abstract
▼
1. Development of technology in fuel pellet production and evaluation of pellet quaility made with ‘Godae-Uksae’, a cultivar of Miscnathus sacchariflorus.
The interests in biomass and its use have been steadily increased globally for recycling energy use. In particular, pellet production device w
1. Development of technology in fuel pellet production and evaluation of pellet quaility made with ‘Godae-Uksae’, a cultivar of Miscnathus sacchariflorus.
The interests in biomass and its use have been steadily increased globally for recycling energy use. In particular, pellet production device with wood biomass has been commercialized, but it is still elementary stage for herbal plants for property and collection of materials. In order to develop technology in fuel pellet production and evaluate pellet quaility made with ‘Godae-Uksae’, a cultivar of M iscnathus sacchariflorus, we evaluatied biomass yield and growth characteristics on miscnathus cultivars and reprsentative germplasm for four years allually, and developed new technology in pelleting with herbaceous material including miscanthus, evaluated quality and combustion characters. The process is as follows.
In all of tested cultivar and line, stem height, diameter, number of stem and biomass yield were increased by elapse of year. In forth season after planting, biomass yield of M . x giganteous were 24 ton/㏊ which were higher yield compared with Godae-Uksea. But continuos evalutions were required for evaluate exact characteristic of cultivars because of drought during the booting stage of forth season. Pelletizing conditions were < 3mm particles, 12.2 ± 0.15% moisture, 255.4 ± 6.51 kg/m3density of particles, 4.5:1 die ratio (L:D). Finally, feed rate was constantly regulated at 130g/min. In results, the sawdust pellets could be produced and their characteristics were 656.1 ± 11.0 g/L of bulk density, 7.7 ± 0.65% moisture, and 98.1 ± 0.22% durability. However, Miscanthus biomass pellets did not form under the above conditions. Considering the factors potentially affecting Miscanthus pelletizing compared to the sawdust, the density of the raw materials was considered the main requisite. The density of the particles may definitely be important factor for pellet formation and thereby durability, because the pellet is only formed at density between 220 and 300 g/L. The bulk density of the produced pellets was nearly constant more than 600 kg/m3 except when the density of the raw materials was lowest at 220 g/L. The total consumed electricity for miscanthus pellets and for sawdust pellets production was almost same each other (195.3 ± 5.8 kW/ton and 193.3 ± 10 kW/ton, respectively). The relationships between the die ratio and moisture content are significant and their optimal conditions are moisture content of 15-25% and a die ratio of 4.5:1– 5.0:1. Among the bioenergy crops, Pellets from Miscanthus ‘Goedae Uksae 1, 2, and 3 had higher bulk density and lower ash contents. Thus, it satisfied higher grade standard qualities. In comparison with wood pellet, miscanthus pellets had higher clinker due to lower melting point after the combustion. However, It could be overcome to adding CaO to the pellets.
2. Examination on the conditions of Miscanthus pellet product
While Miscanthus has many merits such as quantity and eco-friendliness, it requires high density compression pellet production process for the efficient use of fuel. This study could construct efficient process by finding an important fact in pelleting Miscanthus. The process is as follows. Device to crush raw material collected in round bale into chip (chipper), crush device of crushing chipped material into the optimal status for pellet production (hammer mill), collection device that collects crushed material and scattered dust through wind pressure in operating crushing device (dust collector), conditioning device to maximize collected raw material for pellet production (conditioning), density increase device that improves molding feature by increasing low gravity of Miscanthus, pellet molding device that compresses powder material with at least 650kg/㎥by means of interrelation between roller and dies (pelletizer), cooling device that cools down friction heat during molding process into room temperature pellet (cooler), selection device through pelleting, cooling and conveyor, calibrating device with 20kg of selected pellet, sealing packing device that prevents absorptive pellet from external humidity. This study secured the foundation of commercialization of Miscanthus pellet production process, and it is determined that it would be effectively applicable at Miscanthus production unit.
3. Miscanthus boiler use technology development and boiler development
This study is on the boiler use technology of Miscanthus. The boiler consists of storage device that stores Miscanthus pellet, fire grate that combusts pellet directly that is transferred from storage part, heating surface that heats water from hated air from fire grate, combustion fan that supplies necessary external air for pellet combustion and 2nd combustion fan that releases heat exchanged internal air. In particular, this study focused on solving problem of combustion due to the property of Miscanthus pellet. Solid fuel such as wood pellets with sawdust can be applicable to various combustion devices and various combustion devices are suggested. However, as herbal plants such as Miscanthus have difficult combustion condition, the available combustion device is restricted. The reason for this is because of low melting point compared with wood material, which caused clinker and which blocks combustion air of fire grate leading to non-ignition. Accordingly, this study applied and tested various fire grates considering combustion features of Miscanthus and selected proper fire grate for Miscanthus combustion. In order to solve internal boiler problem during solid fuel combustion, it applied heating surface, backfire and ash disposal for safe and effective Miscanthus boiler usability
목차 Contents
- 표지 ... 1
- 제출문 ... 2
- 요약문 ... 3
- SUMMARY ... 4
- 목차 ... 6
- 제 1 장 서 론 ... 7
- 제 2 장 국내외 기술개발 현황 ... 8
- 제 3 장 연구개발수행 내용 및 결과 ... 9
- 제1절 거대억새를 이용한 난방용 펠릿 개발 및 품질평가 ... 9
- 제2절 억새용 펠릿 성형 조건 및 펠릿보일러 이용기술 개발 ... 24
- 제 4 장 연구개발목표 달성도 및 대외기여도 ... 50
- 1절. 목표대비 달성도 ... 50
- 2절. 정량적 성과 ... 51
- 제 5 장 연구개발결과의 활용계획 ... 53
- 제 6 장 연구개발과정에서 수집한 해외과학기술정보 ... 54
- 제 7 장 기타 중요 변동사항 ... 56
- 제 8 장 국가과학기술종합정보시스템에 등록한 연구장비 현황 ... 56
- 제 9 장 참고문헌 ... 57
- 끝페이지 ... 58
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