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Impact of process conditions on the density and durability of wheat, oat, canola, and barley straw briquettes

机译：工艺条件对小麦，燕麦，油菜和大麦秸秆团块的密度和耐久性的影响

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摘要

The present study is to understand the impact of process conditions on the quality attributes of wheat oat, barley, and canola straw briquettes. Analysis of variance indicated that briquette moisture content and initial density immediately after compaction and final density after 2 weeks of storage are strong functions of feedstock moisture content and compression pressure, whereas durability rating is influenced by die temperature and feedstock moisture content. Briquettes produced at a low feedstock moisture content of 9 % (w.b.) yielded maximum densities >700 kg/m3 for wheat, oat, canola, and barley straws. Lower feedstock moisture content of <10 % (w.b.) and higher die temperatures >110 °C and compression pressure >10 MPa minimized the briquette moisture content and maximized densities and durability rating based on surface plots observations. Optimal process conditions indicated that a low feedstock moisture content of about 9 % (w.b.), high die temperature of 120–130 °C, medium-to-large hammer mill screen sizes of about 24 to 31.75 mm, and low to high compression pressures of 7.5 to 12.5 MPa minimized briquette moisture content to <8 % (w.b.) and maximized density to >700 kg/m3. Durability rating >90 % is achievable at higher die temperatures of >123 °C, lower to medium feedstock moisture contents of 9 to 12 % (w.b.), low to high compression pressures of 7.5 to 12.5 MPa, and large hammer mill screen size of 31.75 mm, except for canola where a lower compression pressure of 7.5 to 8.5 MPa and a smaller hammer mill screen size of 19 mm for oat maximized the durability rating values.
机译：本研究旨在了解加工条件对小麦燕麦，大麦和油菜秸秆煤饼品质属性的影响。方差分析表明，压块后立即成型的球团水分含量和初始密度，以及储存2周后的最终密度是原料水分含量和压缩压力的强大函数，而耐用性等级则受模具温度和原料水分含量的影响。以9％（w.b.）的低原料水分含量生产的团块，小麦，燕麦，油菜籽和大麦秸秆的最大密度> 700 kg / m3。根据表面图观察，较低的原料水分含量<10％（w.b.）和较高的模头温度> 110°C和压缩压力> 10 MPa，可使团块水分最小化，密度和耐久性等级最高。最佳工艺条件表明，原料水分含量低至约9％（wb），模具温度高至120-130°C，中大型锤式粉碎机筛网尺寸约24至31.75毫米以及低至高压缩压力最高7.5至12.5 MPa的压块，使团块含水量降至<8％（wb），最大密度达到> 700 kg / m3。在较高的模具温度> 123°C，较低至中等的进料水分含量为9至12％（wb），较低至较高的压缩压力为7.5至12.5 MPa以及较大的锤式粉碎机筛网尺寸的情况下，可以实现耐久性等级> 90％ 31.75毫米，低芥酸菜籽除外，其中较低的压缩压力为7.5至8.5 MPa，锤式粉碎机筛子的较小筛子尺寸为19毫米（燕麦），可最大限度地提高耐用性。

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  • 来源
    《Bioenergy research》 |2015年第1期|388-401|共14页
  • 作者

    J. S. Tumuluru; L. G. Tabil; Y. Song; K. L. Iroba; V. Meda;

  • 作者单位

    1.Biofuels and Renewable Energy Technologies Department Energy Systems and Technologies Division Idaho National Laboratory P.O. Box 1625 Idaho Falls ID 83415-2025 USA;

    2.Department of Chemical and Biological Engineering University of Saskatchewan Saskatoon SK Canada S7N 5A9;

    3.College of Engineering Shenyang Agricultural University Shenyang China;

    2.Department of Chemical and Biological Engineering University of Saskatchewan Saskatoon SK Canada S7N 5A9;

    2.Department of Chemical and Biological Engineering University of Saskatchewan Saskatoon SK Canada S7N 5A9;

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  • 正文语种 eng
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  • 关键词

    Agricultural straws Briquettes Unit density Durability rating Response surface models Optimization Genetic algorithm;

    机译：农用秸秆型煤单位密度耐久性等级响应面模型优化遗传算法;

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