共查询到18条相似文献,搜索用时 375 毫秒
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对某浸出油厂溶耗偏高的原因进行了深入细致的现场分析,发现在蒸脱机蒸脱效果不理想的情况下,由其引起的隐性溶剂消耗往往是导致浸出生产溶耗过高的重要原因。通过对该厂蒸脱机关键部位实施合理改造,改善了蒸脱效果,消除了引起隐性溶耗的原因,结果溶剂消耗得到明显降低。 相似文献
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浸出车间提产降耗改造的分析 总被引:1,自引:0,他引:1
九三公司通过对预浸车间E108螺旋输送绞龙和蒸脱机蒸煮罐进行技术改造,最终实现提高大豆日加工能力,保证生产平稳有序,降低水、电、汽、溶剂的消耗目的。 相似文献
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为解决水稻收获机械物料抖动板表面极细小湿黏物料粘附的问题,提出了利用界面加热实现金属抖动板减粘脱附的方法。以镀锌板和不锈钢板两种基材为试验部件,以极细小湿黏水稻物料为试验对象,构建了湿黏水稻物料与金属抖动板表面的粘附界面模型,分析得出水膜的毛细作用是形成粘附界面的重要原因,揭示了金属抖动板表面加热对粘附界面的脱附作用机理。通过加载加热脱附试验,得到两种金属抖动板脱附率曲线模型,分析表明,粘附界面加热可以有效抑制湿黏水稻物料粘附在金属抖动板表面,当温度为50℃时,镀锌板和不锈钢板的脱附率分别达到61. 81%和61. 33%。振动加热脱附试验表明,金属抖动板的振动强度影响加热脱附效果,采用较低温加热、较高强度振动的方案,脱附效果更好,抖动板采用40℃加热,设定振频6 Hz、振幅40 mm的作业参数,脱附率超过65%,满足实际作业要求。验证试验表明,热气流加热是实现水稻收获机械抖动板与湿黏物料减粘脱附的有效方式。 相似文献
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D.A. Bucks F.S. Nakayama O.F. French B.A. Rasnick W.L. Alexander 《Agricultural Water Management》1985,10(1):81-93
Guayule (Parthenium argentatum Gray) has the potential to alleviate future natural rubber shortages and to provide economic benefits to people in arid lands. A study was initiated to obtain information on guayule plant growth and rubber production as influenced by water management and water use. Annual guayule rubber yields from 2-year-old plants were as high as 500 kg/ha for a whole plant harvest and 300 kg/ha for clipped plants cut 100 mm above the ground using present cultivars under a wet irrigation regime in central Arizona. The clipped plants, when allowed to continue growing, will provide another harvest in 1 or 2 years with a cumulative yield that could be greater than a single harvest of 4-year-old plants. Rubber yield from the wet was twice that of the dry irrigation treatment. Plant height, volume and weight, leaf area, and resin yield were also higher on the wet treatment and decreased in a uniform manner from the wet to dry. Conversely, rubber concentration was higher in the drier than in the watter treatments. Rubber concentration was also higher in the branches than in the roots of the plant. Plant biomass was observed to be closely related to plant height, plant volume, or crown diameter in young plants so that biomass production can be predicted from these plant parameters. Seasonal growth and production patterns also indicated optimum whole plant harvest dates would be from February to March or October to November of each calender year. 相似文献
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设计了一种脱绒棉种双侧双CCD(Charge coupled device)色选检测系统。通过对该检测系统的光学子系统、图像采集子系统和处理子系统等的分析与设计,结合仿真分析和测试试验,验证了系统效果。其中,图像采集子系统采用彩色线阵CCD对脱绒棉种进行成熟度信息采集、黑白线阵CCD对棉种进行完整度信息采集;图像处理和分析用于提取关键特征信息做棉种类型的判别分析。试验结果表明,检测系统设计的光学子系统模块能够得到特征清晰的图像,处理子系统能满足双图像采集子系统CCD正常采集物料特征信息,系统能够保证分选的实时性和稳定性要求。 相似文献
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《Journal of Agricultural Engineering Research》1987,36(2):97-100
A technique using steam for gelatinizing fermented cassava mash was investigated. The mash which was dewatered to about 50% moisture content (wet basis) was heated to between 88°C and 94°C by steaming. The steamed product when dried had characteristics which compared favourably with five samples of gari produced by conventional techniques. The technique could provide the basis for an alternative technology for gelatinizing fermented cassava mash for gari production. 相似文献
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动力换挡技术因具备换挡过程中动力不中断的优点,近年来逐渐被广泛应用于重型拖拉机中。而电液控制系统作为动力换挡变速箱的核心部分之一,其控制过程对车辆性能及换挡品质有直接影响。提出合理的湿式离合器油压控制策略,对改善和优化动力换挡变速箱的换挡品质具有重要意义。选定滑摩功、换挡时间和冲击率作为换挡品质评价指标,通过理论推导建立了三者与动力换挡变速箱电液控制系统之间的联系,根据湿式离合器在换挡过程中输出特性的变化,将动力换挡过程划分为原挡位、扭矩相、惯性相和新挡位4个阶段,结合换挡品质评价指标提出了湿式离合器油压分段控制策略,并以前进1挡换前进2挡为例,在AMESim仿真平台建立相应的Statechart控制模型,针对控制模型中的关键参数运用遗传算法进行优化,将参数优化结果应用于控制系统中并运行仿真。与简单控制策略相比,应用本文所提出的控制策略后,可使换挡过程中产生的最大冲击率由22.14 m/s3降为9.78 m/s3,同时湿式离合器摩擦片单位面积上的滑摩功为0.163 J/mm2,远小于许用值。验证了该控制策略经优化后对改善换挡品质的有效性及合理性。 相似文献
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Summary An investigation was made of the irrigation requirements of cotton grown in a sub-humid environment with significant but highly variable rainfall. In the first year of the study, no additional yield benefits accrued to subsequent irrigations following a pre-emergent irrigation due to above average rainfall (550 mm) throughout the growing season. In the second year a similar rainfall amount (502 mm) fell but significant yield increases to irrigation resulted due to the uneven distribution of the rainfall. The main effect was associated with later rains which influenced the number of bolls set. The maximum amount of water extracted by cotton from a deep grey cracking clay was 178 mm. It was found that 70% of this amount could be depleted before irrigation without loss of yield. Crop evapotranspiration varied from 607 mm with no irrigation after emergence to 775 mm following three irrigations. Irrigation was associated with significant losses from rainfall runoff. Too frequent irrigation creates a risk that soil will be too wet to permit utilisation of natural rainfall. Therefore, the use of soil water information to maximise the interval between irrigation is proposed as a necessary basis for efficient irrigation management. 相似文献