Effect of Densification Conditions on Physical Quality of Densified Sorghum Straw Briquette Fuel

Abstract:

An experiment was conducted on densification processing of sorghum straw stalks with self-made steel molds on a hydraulic universal test platform. The influences of different densification conditions on physical quality of briquette fuel are investigated, including pressures, temperatures, moisture contents and straw preheating method. Moreover, the relationship between molding temperature and inner stress decreasing rate of straw briquette at holding pressure stage is also analyzed. The result shows that the suitable value of moisture content, temperature and molding pressure for straw compression process is 20%, 90°C and at least 50MPa, respectively. The phenomenon of uneven temperature distribution in straw briquette keeps in existence even in the case of microwave preheating. However, in contrast with the very low central temperature in straw briquette when preheating by electric heater wire, the phenomenon of local overheating caused by microwave preheating may be helpful to straw molding process.

• Periodical: Applied Mechanics and Materials (Volume 339)
• Pages: 651-656
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.339.651
• Online since: July 2013
• Authors: Jian Wei Wang, Yan Shan Sun, Zi Ren Jin, Zhi Yuan Feng, Fu Gui Dong
• Keywords: Densification, Microwave, Pressure, Sorghum Straw, Temperature, Water Content

References

[1] Jing Yuanzhuo, Dong Yuping, Gai Chao. Research development and prospects of biomass briquetting technology [J].Engineering Science,2011,12(2):72-77.

[2] Zhang Bailiang, Wang Xutao, Yang Shiguan. Key problems in production and application of straw densification briquetting fuel [J].Transactions of the Chinese Society of Agricultural Engineering,2008,24(7):296-300.

[3] Wang Tao. Study on microwave pyrolytic characteristics of straw bale [D]. Shandong University Master's Thesis：2008.

[4] Phani Adapa, Lope Tabil, Greg Schoenau. Compaction characteristics of barley, canola, oat and wheat straw[J]. Biosystems Engineering, Volume 104, Issue 3, November 2009, Pages 335-344.

DOI: 10.1016/j.biosystemseng.2009.06.022

[5] Madhuchhanda Bhattacharya, Tanmay Basak, Rajtharun Senagala. A comprehensive theoretical analysis for the effect of microwave heating on the progress of a first order endothermic reaction. Chemical Engineering Science [J]. Volume 66, Issue 23, 1 December 2011, Pages 5832-5851.

DOI: 10.1016/j.ces.2011.08.003

[6] Liu Yanchun, Zhang Yingnan, Liu Ming. Revives on Solidification Technology of Biomass[J]. World Forestry,2008,21(4):41-46.

[7] Clara Serrano, Esperanza Monedero, Magin Lapuerta, Henar Portero. Effect of moisture content, particle size and pine addition on quality parameters of barley straw pellets. Fuel Processing Technology [J], Volume 92, Issue 3, March 2011, Pages 699-706.

DOI: 10.1016/j.fuproc.2010.11.031

[8] Wu Yunyu, Dong Yuping, Wu Yunrong. Research on Micro-mechanism of Biomass Briquette [J]. Acta Energiae Solaris Sinica, 2011,32(2):268-271.

[9] Wang Lian, Xiao Guomin, Liu Nan. Research on liquefaction in vacuum pyrolysis of straw [J]。Journal Of Southeast University (Natural Science Edition),2011.41(4):804-808.

[10] Deng Bo. Biomass Briquetting's Characteristics And Finite Element Analysis [D]. Shandong University Master's Thesis：2008.