【作者】 孙悦超；

【导师】 李旭英；

【作者基本信息】 内蒙古农业大学 ， 农业机械化工程， 2005， 硕士

【摘要】 沉水植物(水草)是一类富含营养的生物资源,然而沉水植物的干燥问题一直是制约这一资源有效开发利用的瓶颈。本研究以内蒙古乌梁素海生长的沉水植物(龙须眼子菜)为试验材料,进行了干燥特性和干燥工艺的试验研究。在自然干燥情况下,采用不同处理方式进行干燥对比试验,获得了挤水、喷洒碳酸钾、切段等处理方法对水草干燥速度的影响关系;采用干燥试验装置对水草进行干燥特性试验,分析介质温度、介质风速和单位面积载料量对干燥速率和单位能耗的影响;采用均匀试验设计方法进行试验,建立了回归数学模型,并对回归模型进行了单、双因素分析,探讨各因素对试验指标的影响规律,利用非线性优化方法对回归模型进行参数优化,找到了最佳工艺参数组合。并且,针对水草中硫酸钠含量过高的问题进行了分析试验研究,即在干燥过程中通过采用机械碾压的方式去除水草上附着的灰份,达到降低水草中硫酸钠的含量、改善水草饲料适口性的目的。本试验研究和分析结果为水草干燥技术的进一步研究奠定了基础,并为实际生产和干燥机的设计提供了理论依据。更多还原

【Abstract】 Submerged Vegetation (aquatic Vegetation) with abundant nutritions is a kind of biotic resource, but its utilization is limited due to its drying problem. In this study, drying properties and technologies have been investigated using the submerged Vegetation (potamogeton pectinatics in Wuliangsuhai Lake) as the test materials. In natural drying condition, the comparative tests were carried out by the means of different processing technologies, obtained the relationship between the processing methods of expelling water, spraying potassium carbonate as well as cutting into pieces and drying velocity. The tests based on the uniform design experimentation were performed in a drying device in which the influence of the medium temperature, the wind speed as well as the carrying capacity per unit area on drying velocity and energy consumption rate has been investigated. A Mathematical model was established by regressing the test results. With single-factor analysis and double factor-analysis mathods based on the model, the influence of each factor was investigated and the optimum process parameters were achieved by using nonlinear parameter optimization. Furthermore, the problem of excessive sodium sulfate content in aquatic vegetation was studied as well. The result shows that the ash content and edible property were improved by rolling squeezing the sunken Vegetation. The results obtained in this study has established the foundation for the further research and provided a basis on real production and drying machinery design.更多还原