Experimental Study on the Wet Molding for Wheat Straw Pellet Fuel

Abstract:

In the paper, in order to investigate the situation of impact on wet molding for straw of compressing speed and moisture ratio, and look for the inside law between them, closed compress experimental study on the wet molding for wheat straw pellet fuel was done by electrical universal material experimental machine and experimental provision made by oneself. Study on the impact situation for compressing speed and moisture ratio was done from pressure intensity, displacement and density of materiel. The result, which low compressing speed and low moisture ratio were propitious to wet molding, was gotten. The molding stage can be divided to loose stag, transitional stage, compressing stage. Partial elastic deformation mainly occurred In loose stage, and its mathematical model was linear equation. Elastic deformation mainly occurred In transitional stage, and its mathematical model was exponential equation. Plastic deformation mainly occurred In compressing stage, and its mathematical model was linear equation. The conclusion above has general directive significance to wet molding for straw pellet fuel.

• Periodical: Advanced Materials Research (Volumes 156-157)
• Pages: 284-292
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.156-157.284
• Online since: October 2010
• Authors: Jian Jun Hu, Quan Guo Zhang, Ting Zhou Lei, Zhi Wei Wang
• Keywords: Compressing Speed, Moisture Ratio, Pellet Fuel, Wet Molding, Wheat Straw

References

[1] Peleg K. A Rheological Model of Nonlinear Viscoplastic Solids[J]. The Junrnal of Rheology, 1983, 27(5): 411-431.

DOI: 10.1122/1.549714

[2] Fabrode M O, O'Callaghan J R. A Rheological Model for the Compassion of Fibrous Agricultural Materials[J]. Agric. Engng. Res. 1989, 42(1): 165-178.

[3] Faborode M O，O'Callaghan J R. Theoretical analysis of the compression of fibrous agricultural materials. Journal of Agricultural Engineering Research, 1986, 35(3): 175-191.

DOI: 10.1016/s0021-8634(86)80055-5

[4] OˊDogherty M J, Wheeley J A, Clements K. The effect of moisture content. Drecharge and rate of loading on the compression of wheat and seed rape straw to high densities in closed cylindrical dies. National Institute of Agricultural Engieering, Silsoe, (1982).

[5] Smith I E，Probert S D，Stokes R J, etal. The briquetting of wheat straw. Fuel processing Technol, 1997: 105.

[6] Sheng Kui-chuan, Qian Xiang-qun, Wu Jie. Experimental Studies on Compressing Chopped Cotton Stalks to High Densities[J]. Journal of Zhejiang Agricultural University (Agriculture and Life Sciences ), 2003, 28(2): 139-142. （In Chinese）.

[7] Wang Yan-yun, Wu Jie. Impact on compression molding of moisture ratio for smash cotton straw [J]. Journal of Agricultural Mechanization Research. 2005, 9: 164-165. （In Chinese）.

[8] Ma Yan-hua. The Experimental Study on the Direct Compression Law of the Fresh Herbage Material[D]. Inner Mongolia Agricultural University, 2004, 5. （In Chinese）.

[9] Li Mei-hua; Yu Guo-sheng. Current situation of research on boifuel shaping technology[J]. Wood Processing Machinery, 2005, 2: 36-40. （In Chinese）.

[10] Jiang Jian-chun; Liu Shi-cai 1; Dai Wei-di, et al. Study on Technology of Pelletization of Fuel from Forest Residues[J]. Chemistry and Industry of Forest Products, 1999, 19(3): 25-30. （In Chinese）.

[11] O'Dogherty M J，Wheeler J A. compression of straw to high densities in closed cylindrical dies[J]. Journal of agriculture engineering research, 1984, 29(l): 61-72.

DOI: 10.1016/0021-8634(84)90061-1

[12] Hu Jian-jun. Straw Pellet Fuel Cold Molding by Compression: Experimental Study and Numerical Simulation[D]. Dalian University of Technology, 2008. 6. （In Chinese）.