Authors

Abstract

Despite the abundance of agricultural straw as a renewable resource, its low utilization efficiency remains a significant challenge due to inadequate mechanical processing methods. To solve the problem, the ANSYS finite element simulation software was employed to simulate and analyze two screw configurations (parallel and staggered arrangement) and four compression zone designs. The optimal coupling breaking method was determined to be the parallel type with a 2-2-2 compression zone combination for the twin-screw system. Based on the simulation results, a twin-screw straw pulping machine was constructed. The test factors included screw speed, thread pitch, and straw moisture content, with straw breaking rate as the test index. Simulation test was conducted to optimize the structural parameters of the twin-screw straw pulping machine, followed by a verification test. The results indicated that at a screw speed of 120 r/min, a thread pitch of 203 mm, and a straw moisture content of 60%, the straw breaking rate was the highest at 79.9%. The verification test results were consistent with the simulation results, with less than 5% deviation, confirming the reliability of the simulation model and optimization outcomes. This paper provides a basis for the design and optimization of twin-screw pulping machines and offers theoretical support for the high-value utilization of agricultural waste through enhanced mechanical processing technologies.

Abstract in Chinese

为提高秸秆原料化利用率，推进秸秆综合利用进程，采用ANSYS有限元仿真软件，对并列型与错列型2种螺杆流道结构和4种压缩区组合工况进行模拟分析，确定最佳耦合碾压破碎方式为并列型2-2-2压缩区组合的双螺杆，根据仿真结果试制稻秆双螺杆制浆机。以螺杆转速、螺纹间距和稻秆含水率为试验因素，以稻秆破碎率为试验指标，通过仿真试验对稻秆双螺杆制浆机进行结构参数优化，并进行验证试验。试验表明: 螺杆转速为120r/min，螺纹间距为203mm，秸秆含水率为60%时，秸秆破碎率最高为79.9%；验证试验结果与仿真结果具有一致性，仿真模型和优化结果具有可靠性。本文为双螺杆制浆机的设计和优化提供了依据，为农业废弃物的高值化利用提供了理论支持。