Design and Experiment of Substrate Grass Seed Blanket Extrusion Device

After corn straw and livestock manure are fermented and decomposed, grass seeds are added. The substrate grass seed blanket is made by screw extrusion, applied to park greening, square greening, protective greening, and residential area greening. With this device, the purpose of reducing the labor force and improving space utilization rate can be achieved. The working principle of the substrate grass seed blanket extrusion device is mainly described, and the extrusion process is analyzed including: compaction and filling stage, surface deformation and compaction stage, plastic deformation stage, and molding stage. The main experimental factors are determined through theoretical analysis of screw size and working parameters, including screw pitch, screw length, screw diameter, and screw speed. Using the EDEM simulation analysis method, taking the quality of extruded particles and the uniformity of grass seed mixing as test indexes, and under the condition of the same extrusion time of 30 s using Design-Expert software to carry out an orthogonal quadratic rotation combination test, a significant regression model was obtained. The effects of different parameters and extrusion conditions on grass seed blanket forming influence were studied by response surface analysis. The optimal working parameters were obtained: screw speed 250 r·min−1, screw pitch 120~80 mm, screw diameter 240 mm, and screw length 400 mm. With the same extrusion time of 30 s, extruded pellet mass was 2620 g, calculated mass flow rate was 131 g/s, and the grass seed mixing uniformity was 92.35%. Under the optimal simulation conditions, the prototype was manufactured, and the actual verification test was carried out. The errors between the measured values of extruded substrate quality and grass seed mixing uniformity and the simulation test results were 3.4% and 2.5%, respectively, which met the requirements of the grass seed blanket extrusion molding device.

[1]  Z. Qu,et al.  Parameters Optimization and Test of Caterpillar Self-Propelled Tiger Nut Harvester Hoisting Device , 2022, Agriculture.

[2]  Yongjie Cui,et al.  Simulation and Experiment of the Spiral Digging End-Effector for Hole Digging in Plug Tray Seedling Substrate , 2022, Agronomy.

[3]  L. Sheng,et al.  Physicochemical modification of corn straw biochar to improve performance and its application of constructed wetland substrate to treat city tail water. , 2022, Journal of environmental management.

[4]  C. Bignami,et al.  Composted Solid Digestate and Vineyard Winter Prunings Partially Replace Peat in Growing Substrates for Micropropagated Highbush Blueberry in the Nursery , 2022, Agronomy.

[5]  Huu Loc Nguyen,et al.  Using the Box–Behnken Response Surface Method to Study Parametric Influence to Improve the Efficiency of Helical Gears , 2021, Machines.

[6]  Panpan Wang,et al.  Effects of different fermentation assisted enzyme treatments on the composition, microstructure and physicochemical properties of wheat straw used as a substitute for peat in nursery substrates. , 2021, Bioresource technology.

[7]  Nripes Kumar Mandal,et al.  Theoretical developments in response surface designs: an informative review and further thoughts , 2021, Communications in Statistics - Theory and Methods.

[8]  K. Gao,et al.  Application of a screw conveyor with axial tilt blades on a shearer drum and investigation of conveying performance based on DEM , 2021, Particuology.

[9]  Jun Liu,et al.  Design and optimization and experimental verification of a segmented double-helix blade roller for straw returning cultivators , 2021 .

[10]  C. Macdougall,et al.  Structural performance of non-plastered modular straw bale wall panels under transverse and gravity loads , 2019, Construction and Building Materials.

[11]  Y. Miao,et al.  Investigating the Functions of Particles in Packed Aggregate Blend using a Discrete Element Method , 2019, Materials.

[12]  Xun Wang,et al.  Effect of different solid medium on blueberry soilless culture , 2018 .

[13]  A. Secchi,et al.  Continuous pretreatment of sugarcane biomass using a twin-screw extruder , 2017 .

[14]  L. Tabil,et al.  Impact of process conditions on the density and durability of wheat, oat, canola, and barley straw briquettes , 2015, BioEnergy Research.

[15]  Baljit Singh,et al.  Response Surface Analysis for Preparation of Modified Flours using Twin Screw Extrusion Cooking , 2014 .

[16]  Han Yan,et al.  ALL STRAW FIBER COMPOSITES: BENZYLATED STRAW AS MATRIX AND ADDITIONAL STRAW FIBER REINFORCED COMPOSITES , 2014 .

[17]  Erdal Kayacan,et al.  Bulk compression characteristics of straw and hay , 2014 .

[18]  Shu-quan Jin,et al.  [Effects of sludge compost used as lawn medium on lawn growth and soil and water environment]. , 2013, Huan jing ke xue= Huanjing kexue.

[19]  Yang He,et al.  Virtual Design of Rapid Sample Preparation Equipment for Textiles Based on SOLIDWORKS , 2013 .

[20]  Liming Zhou,et al.  Discrete Element-Based Optimization Parameters of an Experimental Corn Silage Crushing and Throwing Device , 2021, Transactions of the ASABE.

[21]  Weiming Yi,et al.  Effect of biochar on mechanical and flame retardant properties of wood – Plastic composites , 2017 .

[22]  G. Martínez-Gutiérrez,et al.  Substrate volume and nursery times for earliness and yield of greenhouse tomato , 2016 .

[23]  Jia Chao-bi,et al.  Research on Parametric Study Method of Screw Conveyor , 2015 .

[24]  Lionel S. Smith,et al.  The grass-free lawn: Management and species choice for optimum ground cover and plant diversity , 2014 .