移动式稻麦秸秆立式环模压块成型机试验
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摘要
针对国内秸秆压块机不能移至田间进行压块成型作业的现状,设计了利用75 kW轮式拖拉机进行牵引的移动式秸秆压块机.以水稻秸秆为原料,对移动式秸秆压块机进行生产试验研究,寻求作业参数对压块机压块成型影响规律和最优组合.采用3因素4水平二次正交旋转组合试验方法,以喂入辊转速、叶轮转速、环模主轴转速为影响因子,秸秆压块密度及生产率为评价指标,利用Design-Expert 8.0.6软件,对试验结果进行方差分析及响应面分析,建立了3个因子对评价指标影响的数学模型.结果表明:对秸秆压块密度的影响因素大小顺序为环模主轴转速、叶轮转速、喂入辊转速;对秸秆压块生产率的影响因素大小顺序为喂入辊转速、环模主轴转速、叶轮转速;当喂入辊转速为125.84 r·min~(-1)、叶轮转速为776.05 r·min~(-1)、环模主轴转速为169.16 r·min~(-1)时,秸秆压块密度与生产率分别为1.153 g·cm~(-3),1 135.87 kg·h~(-1),满足秸秆压块成型要求.
To complete the straw briquetting operation in the field, a movable straw briquetting machine driven by 75 kW wheeled tractor was designed. The production tests were performed on the movable rice and wheat straw briquetting machine with rice straw as raw material. According to the experimental results, the effect rules of craft parameters on the straw briquetting of briquetting machine were analyzed to obtain optimal parameter combination. A central composite rotatable orthogonal experiment design of response surface methodology was employed to find the optimum technical parameters.Straw compact density and productivity were selected as responses, and feed roll speed, impeller shaft speed and mainshaft speed were used as input variables with four levels respectively. Variance analysis and response surface analysis were applied to analyze the test results by Design-Expert 8.0.6. The mathematical model was established to analyze the effect of three factors on test indexes.The results show that the effecting decreasing sequence on straw compact density is mainshaft speed,impeller shaft speed and feed roll speed,while the effecting decreasing sequence on productivity is feed roll speed, mainshaft speed and impeller shaft speed. When the feed roll speed is 125.84 r·min~(-1) with impeller shaft speed of 776.05 r·min~(-1) and mainshaft speed of 169.16 r·min~(-1),the straw compact density mean is 1.153 g·cm~(-3) with the productivity of 1 135.87 kg·h~(-1),which can meet the requirements of straw briquetting.
To complete the straw briquetting operation in the field, a movable straw briquetting machine driven by 75 kW wheeled tractor was designed. The production tests were performed on the movable rice and wheat straw briquetting machine with rice straw as raw material. According to the experimental results, the effect rules of craft parameters on the straw briquetting of briquetting machine were analyzed to obtain optimal parameter combination. A central composite rotatable orthogonal experiment design of response surface methodology was employed to find the optimum technical parameters.Straw compact density and productivity were selected as responses, and feed roll speed, impeller shaft speed and mainshaft speed were used as input variables with four levels respectively. Variance analysis and response surface analysis were applied to analyze the test results by Design-Expert 8.0.6. The mathematical model was established to analyze the effect of three factors on test indexes.The results show that the effecting decreasing sequence on straw compact density is mainshaft speed,impeller shaft speed and feed roll speed,while the effecting decreasing sequence on productivity is feed roll speed, mainshaft speed and impeller shaft speed. When the feed roll speed is 125.84 r·min~(-1) with impeller shaft speed of 776.05 r·min~(-1) and mainshaft speed of 169.16 r·min~(-1),the straw compact density mean is 1.153 g·cm~(-3) with the productivity of 1 135.87 kg·h~(-1),which can meet the requirements of straw briquetting.
引文
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[ 2 ] 陈树人,肖君,刘超.9JYK-2000A 秸秆压块机环模摩擦试验[J].江苏大学学报(自然科学版),2017,38(1):42-46.CHEN S R,XIAO J,LIU C.Friction experiment of 9JYK-2000A straw briquetting machine[J].Journal of Jiangsu University (Natural Science Edition),2017,38(1):42-46.(in Chinese)
[ 3 ] LARSSON S H, RUDOLFSSON M, THYREL M,et al.Temperature controlled feed layer formation in biofuel pellet production[J].Fuel,2012,94:81-85.
[ 4 ] MAREK R,PETR T,EVA K,et al.Influence of annealing temperature of straw briquettes on their density and hardness[J].Applied Energy,2013,61:1377-1382.
[ 5 ] LEI S,NIELS N P K,WOLFGANG S. Lab and bench-scale pelletization of torrefied wood chips:process optimization and pellet quality[J]. Bio Energy Res,2014, 7 (1):87- 94.
[ 6 ] PUIG-ARNAVAT M,SHANG L,SáROSSY Z,et al.From a single pellet press to a bench scale pellet mill: pelletizing six different biomass feedstocks[J].Fuel Processing Technology,2016,142:27-33.
[ 7 ] RUDOLFSSON M,STELTE W,LESTANDER T A.Process optimization of combined biomass torrefaction and pelletization for fuel pellet production:a parametric study[J].Applied Energy,2015,140:378-384.
[ 8 ] GILLESPIE G D,EVERARD C D,FAGAN C C,et al.Prediction of quality parameters of biomass pellets from proximate and ultimate analysis[J].Fuel,2013,111(9):771-777.
[ 9 ] 段建.立式环模秸秆压块机设计理论及试验研究[D].镇江:江苏大学,2015.
[10] 邱进,吴明亮,官春云,等.动定刀同轴水稻秸秆切碎还田装置结构设计与试验[J].农业工程学报,2015,31(10):11-19.QIU J,WU M L,GUAN C Y,et al.Design and experiment of chopping device with dynamic fixed knife coaxial for rice straw[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(10):11-19.(in Chinese)
[11] 刘宇欣,肖志刚,杨庆余,等.挤压复合酶法制备玉米多孔淀粉工艺参数优化[J].农业机械学报,2013,44(4):171-178.LIU Y X,XIAO Z G,YANG Q Y,et al.Optimization of technology parameters of corn porous starch by extrusion enzyme synergistic method[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(4):171-178.(in Chinese)
[12] 李升锋,徐玉娟,张友胜,等.玫瑰茄花青素提取条件优化研究[J].广东农业科学,2006(11):83-85.LI S F,XU Y J,ZHANG Y S,et al.Optimization of extraction conditions of roselle anthocyanin[J].Guangdong Agricultural Sciences,2006(11):83-85.(in Chinese)
[13] 陈树人,段建,姚勇,等.环模式成型机压缩水稻秆成型工艺参数优化[J].农业工程学报,2013,29(22):32-41.CHEN S R,DUAN J,YAO Y,et al.Optimization of technique parameters of annular mould briquetting machine for straw briquette compressing[J].Transactions of the Chinese Society of Agricultural Engineering,2013,29(22):32-41.(in Chinese)
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