冷冻式与吸附式干燥器组合应用及改进

分析了压缩空气水分含量高的原因,提出了降低压缩空气露点的整改措施:加强冷冻式干燥器排水的检测,将微热再生干燥器再生气孔板由ψ10 mm放大到ψ20 mm,切换时间由90 min改成180 min,电加热时间由45 min延长至90 min.实施后,压缩空气中水分含量控制稳定(质量分数≤50×10-6),达到主装置生产工艺要求.     

基于LabVIEW的微速差双转子动平衡测试系统的开发

介绍了微速差双转子系统的动平衡原理,根据相关原理准确得到内外转子不平衡量大小和相位,结合虚拟仪器技术在LabVIEW下开发的测试程序,实现微速差双转子系统的动平衡,并在卧螺离心机上进行了实验验证。     

超声-微酸性电解水联合处理对腐败希瓦氏菌的作用机制

研究超声（ultrasound,US）-微酸性电解水（slightly acidic electrolyzed water,SAEW）联合处理对腐败希瓦氏菌的作用机制。分别对腐败希瓦氏菌菌悬液进行US、SAEW、超声-微酸性电解水（US+SAEW）联合处理10 min,以无菌生理盐水处理腐败菌为对照（CK）组。通过减菌效果、细菌生长曲线、电导率、碘化丙啶摄入量、碱性磷酸酶（alkaline phosphatase,AKP）与乳酸脱氢酶（lactate dehydrogenase,LDH）活力、紫外吸收物质泄漏量等指标测定菌体细胞膜及内环境变化,并结合扫描电子显微镜对处理前后的菌体微观结构进行观察。结果表明,US+SAEW联合处理可使腐败希瓦氏菌菌落总数降低2.48(lg(CFU/mL));与CK组和单一处理组相比,US+SAEW联合处理使菌体细胞膜的完整性受到明显破坏,导致其细胞质泄漏,电导率、AKP与LDH活力显著升高（P<0.05）。同时,US+SAEW联合处理后,菌体塌陷明显、外膜出现断裂、细胞壁受损,内容物大量外泄。因此,US+SAEW联合处理能在US使腐败希瓦氏菌的细胞...     

生物过滤在微污染水处理中的应用

以生物过滤作为微污染水处理的末级处理工艺 ,使有机污染物和浊度的去除在同一滤层内实现 ,是一种经济、有效的生物处理方法。本文分析讨论了生物过滤技术在实际应用中的具体形式和影响因素并展望了今后主要的研究方向     

浅度加氢技术在C4馏分脱除丁二烯中的应用

阐述了轻C4馏分浅度加氢脱除丁二烯生产原理及工艺流程,分析选择性加氢生产影响条件,并介绍选择性催化剂防护措施。生产实践表明,通过合理控制生产操作参数,可以使丁二烯转化率达到96.47%.     

Effects of slightly acidic low concentration electrolyzed water on microbiological, physicochemical, and sensory quality of fresh chicken breast meat

Anticmicrobial effect of slightly acidic low concentration electrolyzed water (SlALcEW) and strong acidic electrolyzed water (StAEW) on fresh chicken breast meat was evaluated in this study. Meat samples each of 10 ± 0.2 g in weight and 2.5 × 2.5 cm2 in size were experimentally inoculated with Listeria monocytogenes (ATCC 19115) and Salmonella Typhimurium (ATCC 14028) and subjected to dipping treatment (22 ± 2 °C for 10 min) with SlALcEW and StAEW. Shelf-life study was conducted for inoculated and noninoculated meat samples treated with SlALcEW and StAEW at storage temperatures of 5, 15, and 25 °C. Dipping treatment with electrolyzed water significantly (P < 0.05) reduced the background and inoculated pathogens compared to untreated controls. The reduction of 1.5 to 2.3 log CFU/g was achieved by SlALcEW and StAEW against background flora, L. monocytogenes and Salmonella Typhimurium. There was no significant difference (P > 0.05) between the SlALcEW and StAEW treatments efficacy. Comparing treated samples to untreated controls showed that SlALcEW and StAEW treatments extended the shelf life of chicken meat at different temperatures with marginal changes of sensory quality. Although SlALcEW and StAEW treatments showed similar antimicrobial effects but SlALcEW was more beneficial in practical application for its semineutral pH and low chlorine content. PRACTICAL APPLICATION: Food safety issues have led to development of new sanitizers to eliminate spoilage and pathogenic organisms in food. This study provides the foundation for further application of slightly acidic low concentration electrolyzed water (SlALcEW) as a sanitizing agent in meat industry. SlALcEW can be produced on site on demand and no chemicals are necessary except NaCl solution. It does not leave any residue in food due to low chlorine concentration and it is safe to handle for its semineutral pH.     

炼油厂轻度污染废水净化回用中试研究

采用新型的循环式生物曝气滤池和砂滤相结合的工艺,对某炼油厂轻度污染废水进行现场处理回用试验研究。结果表明循环式生物曝气滤池在气、水体积比为5∶1,水力停留时间为1.0 h,反冲洗周期为4~7 d的条件下,炼油厂轻度污染废水经上述工艺处理后,COD、石油类污染物和固体悬浮物(SS)平均去除率分别为89.7%、97.0%和88.8%,再经砂滤工艺进一步去除SS后,出水COD、石油类污染物和SS平均质量浓度分别为7.58、0.20 mg/L和2.50 mg/L,经处理后完全可以回用于生产。     

提高缓倾斜矿体资源回采率的开采方案研究

针对桃冲矿业公司井下局部矿体的产状情况进行了极具个性化的回采设计，从而安全、高效地多采出大量矿石，回采率提高10％，不仅为公司带来了近250万元的经济效益，也为公司下部矿石的开采和上部残矿的回收提供了宝贵经验和创新思路。     

陀螺系统等导重特征值的阻尼摄动

导出了在位形空间中，求解对应无阻尼问题有等导重特征值的弱阻尼陀螺特征值问题的直接摄动法。算例表明本文所导出的方法是正确的。