运行参数对内热型板式除湿溶液再生装置的性能影响试验研究

为了研究不同工况下内热型板式再生器的再生性能,搭建了再生试验系统,分别研究了空气、溶液以及热水入口参数对再生系统热质传递特性的影响,并运用SPSS软件对各参数进行敏感性分析.结果显示,空气侧入口流速对再生器的性能起到至关重要的作用,随着空气流速增加,再生量从0.82 g/s升至2.04 g/s,但再生效率从90.15％...     

Experimental Investigation on Hydromechanical Deep Drawing of Aluminum Alloy with Heated Media

Temperature controlled sheet hydroforming is known as the innovative processing of warm/hot sheet hydroforming. Cylindrical cup hydromechanical deep drawing (HMD) at elevated temperature is the typical process for basic research. Warm HMD process was carried out on a warm sheet hydroforming experiment platform to investigate the influences of key processing parameters on formability. The process window of successful forming versus liquid pressure was obtained, which was manifested as a shape of pyramid. The region of successful forming in warm/hot sheet hydroming is a father set of that in cold sheet hydroforming. The microstructure evolution of cups formed by using warm HMD under the effect of temperature was investigated. The grain growth was observed compared with cold HMD. The hardness of hydroformed cup was tested and no apparent reduction of hardness was detected.     

Effect of Partially Bowed Heated Rod on DNB in Coldwall Thimble Cell Geometry

Cell calculations of a Th-fueled PWR are carried out to discuss the burnup characteristics, coolant void reactivity coefficients, and the effectiveness of the mechanical spectral shift control method by fertile rod insertion. It is shown that the Th fuel can achieve a high discharge burnup with less increase of the fissile concentration than in the U fuel. It is also shown, particularly in the Th-fueled cores, that the fertile rods are effective for the spectral shift control and for improving the conversion ratio.     

Deposition of Nickel and Cobalt Ions on Heated Surface under Nucleate Boiling Condition

The depositionof Ni and Co ions on a heated surface of simulating fuel rods has been studied in water at atmospheric and 70 atm pressures during nucleate boiling.

The effects of various factors, including heat flux of the heated surface, concentration of coexisting iron oxide (αFe₂O₃ and concentration of Ni and Co ions, on their deposition rate have been investigated. The model for iron oxide deposition which is based on microlayer evaporation and drying out phenomena in the nucleate boiling bubble was shown to be applicable to the deposition of Ni and Co ions. That is, dW/dt=K.Q.C/L, where dW/dt is the deposition rate, K the deposition rate coefficient, Q the heat flux, C the ion concentration, and L the latent heat of vaporization. The K value of Ni ion is about 0.1 and independent of iron oxide concentration. On the hand, the K value of Co ion increases with iron oxide concentration and seems to approach that of iron oxide concentration and seems to approach that of iron oxide (0.3). The Co ion deposited with iron oxide forms Co ferrite. Solubility of Co ferrite is small compared with that of Co deposits without iron oxide (CoO or Co(OH)₂). The increase in the K value of Co ion with iron oxide concentration is attributed to the change in chemical form of Co deposits into more stable species not favoring Co release.     

粉煤锅炉受热面技术改造综述

针对山西天脊煤化工集团有限责任公司引进德国Steinmuller公司生产的225t/h自然循环粉煤炉运行过程中,省煤器对流管束磨损严重、排烟温度高、热损失大及合成氨扩能改造后锅炉给水温度提高,个别工况下热力参数偏离设计值等问题,在综合分析研究的基础上对省煤器及过热器对流管束受热面实施技术改造。经改造后对流管束磨损明显减轻,锅炉运行稳定,经济效益显著提高。     

不同杀菌方式对盐焗鸡翅根品质的影响

盐焗鸡是广东特色客家菜肴。为了实现在长期常温状态下保存盐鸡翅根,探讨不同杀菌方式对其杀菌效果的优劣以及对肉质的影响,进行了低温长时杀菌和微波杀菌的对比试验,并在感官、理化、微生物和质构方面对杀菌效果进行比较。实验结果表明,微波杀菌效果要明显优于低温长时杀菌,对肉质的损伤较小,杀菌时间短,并且在贮藏过程中微生物生长缓慢,货架期较长;低温长时杀菌虽杀菌效果不够理想,但也实现了25℃下较长时间的保藏,较传统的巴氏杀菌方法有了较大的改进。     

牛巴革基布的开发

叙述了牛巴革基布的开发过程及使用设备的最佳工艺参数配置，并对关键工艺过程进行了分析。牛巴革基布作为一种新型合成革基布，有其广阔的市场前景。     

果冻类样品中非法添加物质2种提取方法比较

目的比较常规加热法和粉碎离心法对果冻类样品中非法添加物质的提取效果。方法以常见的2种降糖类、4种减肥类和3种利尿类非法添加化学物质为研究对象制备基质加标阳性样,样品经加热和粉碎离心处理后采用超高效液相色谱串联质谱仪测定,外标法定量,以基质效应、回收率和精密度为指标考察2种方法的提取效率。结果加热处理下样品的回收率为31.27%~135.50%,精密度为0.75%~16.40%,经粉碎离心提取处理下的样品中的9种非法添加化学药物回收率为51.60%~116.90%,精密度为1.63%~10.70%,粉碎离心处理下样品的基质效应也低于加热处理。结论相较于加热提取法,粉碎离心提取法操作简便、结果稳定可靠、灵敏度高,可用于果冻类胶质样品的样品前处理。     

应用远场涡流检测技术监测在役受热面管壁减薄况的工艺研究

针对常规受热面管壁厚监测方法的不足,提出运用远场涡流检测技术对受热面管壁厚进行监测.在介绍远场涡流检测技术基本原理的基础上,讨论了应用远场涡流检测技术监测管壁减薄的工艺要点,包括检测依据确定、检测系统选取、标样管设计、检测系统调校等.实际检测案例证明,远场涡流检测技术是监测受热面管壁减薄状况的一种行之有效的手段.     

热牵伸辊非接触式旋转温度变送器的设计

 热牵伸辊表面温度测量精确度直接影响到热牵伸辊温控系统的控制精度,为此设计了旋转温度变送器,以解决热牵伸辊在高速旋转和高电磁强度下的精确测温问题。设备采用感应耦合电能传输技术,为其旋转部件非接触供电,使用集成了数模转换器的C8051F单片机完成温度采集和处理,并利用红外技术解决旋转部件的数据传输和抗干扰问题。软件方面采用滑窗平均滤波算法抑制干扰,采用分段线性插值法提升测温准确性。在辊体转速高达8000 r/min情况下,非接触式供电和红外数据传输稳定,温度测量精度达到0.1 ℃,3个多月运行结果表明,设备的稳定性及测量精度均达到设计要求。