EPA-99-1605-02-03

099

4,900,000 千元

2010/11/26

2011/11/25

張慶源

環檢所

劉廣尉

國立臺灣大學

環境監測及檢測

低溫裂解，低溫裂解，生質燃料，生質廢棄物

low-temperature pyrolysis, torrefaction, biomass, biowaste

李元陞;吳照雄;謝哲隆;陳奕宏;林法勤

張家驥

02-33664400#

d92541005@ntu.edu.tw

本計畫針對國內草本及木本之生質廢棄物，進行低溫裂解轉製生質炭燃料進行研究並探討其未來實廠化之可行性，並設置一處理量26 kg/hr之旋轉窯式先導型生質物低溫裂解爐，做為未來生質物低溫裂解技術推廣之依據。本計畫實驗室進行柳杉、稻稈及垃圾蒸煮後分選之生質纖維低溫裂解試驗，其結果顯示，在重量保留率70%之情況下，經低溫裂解後柳杉、稻稈之熱值明顯增加至5,000-6,200 kcal/kg，已接近煤炭熱值，且能量密度提升10-30%。生質纖維因木質素含量低，熱值提升較柳杉、稻稈為低。此外並以現有之裂解設備進行實廠生質物低溫裂解操作，其結果顯示現行之實廠低溫裂解爐須針對進料系統、爐體操作參數加以修正，並增設出料冷卻設備，方能符合生質物低溫裂解操作之需求。經濟評估成果顯示，實廠低溫裂解廠低溫裂解柳杉與稻稈之能源生命週期分析(energy life-cycle analysis, ELCA)評估之能量投入皆在4.65 MJ kg-1 year-1左右。投入能量項目中，低溫裂解設備熱源消耗較多能量，其次為收集運輸之能量。模廠規模低溫裂解廠之ELCA也是低溫裂解設備熱源所耗能量較其他設備大，低溫裂解廢氣回收再利用來減少熱源化石燃料之消耗。柳杉與稻稈之能量投入回收比 (energy return on investment, EROI)為4.07與3.33；淨能量比 (net energy ratio, NER)為3.07與2.33；而整體熱效率(overall thermal efficiency, ηTE)為82.36與73.38%。針對未來生質物低溫裂解產製生質炭燃料廠之設置，宜採用生質物低溫裂解設備規模可朝向小型化、分散式設置。

低溫裂解，低溫裂解，生質燃料，生質廢棄物

EPA9916050203.pdf

9MB

2012/2/1 上午 12:00:00

This project investigated the characteristic of herbal and woody biomass waste low-temperature pyrolysis for the solid alternative biofuel production and evaluated the feasibility of the real plant setting. A 26 kg/hr processing capacity rotary kiln pilot low-temperature pyrolysis system was also set up. The laboratory result shows that under 70 wt.% retention, the heat value of cedar and rice straw was significantly increased to 5,000-6,200 kcal/kg after low-temperature pyrolysis processes which are already close to the coal. While energy density increased by 10 to 30%.Because of low lignin content of the organic fiber from municipal solid waste (MSW), the increasing of heating value is not significant. The result of real scale pyrolysis plant test shows that the rotary kiln type reactor can use for the production of biomass solid fuel, however the feeding system, rotating rate and product cooling system have to improve. Economic assessment results show the real scale plant to product cracker and rice straw biomass need energy input 4.65 MJ/kg per year for the ELCA. The energy analysis shows that heating of the low-temperature pyrolysis equipment heat consume the most energy, followed by the collection and transportation of energy. The EROI of cedar and rice straw solid biofuel production are 4.07 and 3.33, NER are 3.07 and 2.33, and η TE are 82.36 and 73.38%. For the future promotion of low-temperature pyrolysis biomass production system, the real plant should be regional and local and use small or middle -scale devices substitute large scale equipment.

low-temperature pyrolysis, torrefaction, biomass, biowaste