Nutritional bioactive compounds and technological aspects of minor fruits grown in Brazil

Brazil is one of the three major fruit producers in the world. Native and/or exotic Brazilian fruits have great nutritional and economic potential. Eggfruit, blackberry, Brazilian guava, atemoya, bacuri, sweetsop, starfruit, feijoa, cactus pear, fruit of wolf, breadfruit, jaboticaba, jackfruit, rose apple, lychee, mangaba and marolo are already present in the Brazilian diet, but they are not yet industrialized and are minor agricultural products. These fruits are produced and used in the manufacture of handicraft products such as jellies and sweets that are available in free markets, but production is small-scale and without safe operational procedures. These fruits are seasonal with large postharvest losses. Thus, it is necessary to initiate competitive agribusinesses in the producing regions for these fruits to enhance local economies. This review summarizes the major nutritional and bioactive compounds found in these fruits, the technological aspects of their cultivation, and future prospects for introducing consumption of these fruits and their respective products to Brazilian and/or foreign markets.     

关于贵州煤矿百万吨死亡率灰色预测的探讨

应用灰色系统理论,建立GM(1,1)灰色预测模型,对近几年来贵州煤矿百万吨死亡率进行统计预测,通过灰色模型预测结果与多项式回归模型预测结果的对比,说明该灰色模型基本正确可靠,预测精度较高。因此,利用此灰色模型可对贵州煤矿的安全状况进行科学的分析及预测,及时采取必要的防范措施,对安全管理能起到一定的辅助作用。     

高、低混合流速循环流化床锅炉的应用

介绍了一种高效高、低混合流速循环流化床锅炉的原理,技术特点及其工程应用.新型高效循环流化床锅炉吨汽有效容积随挥化份而变化,选取了合理的有效容积,且设计分离器阻力小于800 Pa.实践表明：新型锅炉热效率88％～91％,飞灰含碳量低至3％ ～5％,飞灰200目过筛率达88％.     

简易选煤厂选煤方法的确定

介绍了处理不同类型煤时，简易选煤厂优先采用的选煤方法，以及煤泥水的处理流程及设备。     

SSJ650带式输送机和40T刮板输送机的改进与联接

带式输送机具有许多优良的性能 ,通过对SSJ6 5 0带式输送机和 4 0T刮板输送机的改进 ,并通过多种联结方案的选择 ,提出了一种结构简单 ,使用方便的支柱螺栓联结装置 ,使两者配合使用 ,减少了中间转载环节 ,提高了采煤生产率 ,降低了吨煤成本。     

Heat Transfer and Energy Analysis of a Pusher Type Reheating Furnace Using Oxygen Enhanced Air for Combustion

 Oxy-fuel firing is more energy efficient and environmental friendly than conventional air-fuel firing and its application for reheating furnaces has begun since 90s. In this study, a computational methodology is presented to predict the steady heat transfer to the billets and temperature distribution in a continuous Pusher type reheating furnace which combustion air is enhanced by oxygen. The furnace is modeled as 2D radiating medium and Weighted Sum of Gray Gases model is used for absorption coefficient. The billets are moved in constant speed through zones of furnace. Radiative heat flux calculated from the radiative heat exchange within the furnace is modeled using the FVM considering the effects of furnace walls and billets. Energy consumption per ton of steel, production rate and thermal efficiency of furnace, and trend of NOx emission in various levels of oxygen enrichment is investigated by comparison with baseline furnace (21% O2 in air).     

攀钢铁水炉外脱硫的发展

介绍了攀钢铁水炉外喷吹脱硫的发展过程,并就未来的发展方向提出了展望。     

限产对钢铁联合企业吨钢综合能耗的影响

从系统节能的思想出发,分析了限产对典型钢铁联合企业吨钢综合能耗的影响,指出了保持和降低吨钢综合能耗的结构调整思想和途径。     

BPRT的技术进步与节能

介绍了BPRT的技术进步与节能情况。在高炉煤气透平通过变速离合器直接驱动电动鼓风机,改进电动鼓风机性能,当高炉正常生产时,鼓风机不会由防喘阀放风。优化安全机制方便了BPRT试车。BPRT投运后,吨铁鼓风耗电降至42kW·h。     

实际物流下能耗及节能潜力的计算分析

运用系统节能理论，通过对宣钢实际生产中的能耗和物流分析，提出了降低宣钢工序能耗的措施及工序节能效果。根据宣钢实际生产流程做出了基准物流图，通过基准物流图与实际物流图的对比计算和分析，得知物流不合理分配是造成宣钢吨钢能耗较高的主要原因；降低企业能耗，必须重视对宣钢现有物流的合理调整，尤其是对炼铁工序钢比系数的调整；只有降低铁钢比，才能根本改变宣钢吨钢能耗较高的现状。