秸秆多级连续冷辊压成型试验研究

为了研究秸秆多级连续冷辊压成型方法的可行性，设计并试制了样机，采用正交试验方法，以玉米秸秆含水率、秸秆破碎方式、破碎长度、喂料方式为试验因素，以成型块回弹率、密度、坚实度为试验指标，进行了四因素三水平正交试验研究，研究试验因素对试验指标的影响。试验表明，交叉铆固的喂料方式最能限制成型块的回弹；成型块密度主要受破碎方式的影响，受破碎长度的影响较小；成型块坚实度主要受破碎方式的影响，受含水率的影响较小。通过综合分析确定该成型机的较优成型参数为：秸秆含水率20%，破碎方式为揉搓破碎，破碎长度80mm，喂料方式为交叉铆固。在较优成型参数下进行试验，测试秸秆多级辊压成型机的性能指标，结果表明，该成型机生产的玉米秸秆成型块的回弹率为7.26%，成型密度为363.28kg/m3，坚实度为90.23%。本研究可为生物质常温致密成型技术及其设备的研发提供参考。

Experiment on Multi-stage Continuous Cold Roll Forming of Straw

In order to explore the feasibility of the straw multi-stage continuous cold roll forming method, a prototype was designed and tested. Orthogonal test method was used to test the four-factor three-level orthogonal test with the moisture content, crushing method, crushing length and feeding method of corn straw as the test factors, and the rebound rate, density and firmness of the formed blocks as the test indicators. The influence of experimental factors on experimental indicators was researched. The test results showed that the cross-riveted feeding method can most restrict the rebound of the shaped block;the density of the shaped block was mainly affected by the crushing method, followed by the length of the crushing;the solidity of the shaped block was mainly affected by the crushing method, and the moisture content was the second of it. Comprehensive analysis determined that the preferred forming parameters of the molding machine were: moisture content of 20%, crushing method by rubbing and crushing, crushing length of 80mm, feeding method by cross riveting. The experiment was carried out under the conditions of better molding parameters, and the performance indicators of the molding machine were tested. The results showed that the rebound rate of corn straw molding block produced by the molding machine was 7.26%, the molding density was 363.28kg/m3, and the firmness was 90.23%. The research results provided a reference for the research and development of biomass compression molding technology and equipment at normal temperature.