浅析废旧轮胎高值化综合利用新模式

介绍国内外废旧轮胎综合利用传统方式和新模式以及发展方向。废旧轮胎综合利用的传统方式主要包括轮胎翻新、热能利用、热裂解、制备再生橡胶、制备胶粒和胶粉。结合有代表性的企业重点介绍了从废旧轮胎到胶粒、胶粉应用，从废旧轮胎到改性胶粉应用，从废旧轮胎到混炼胶、新轮胎或橡胶、橡塑制品全产业链闭合生态圈新模式，针对我国废旧轮胎高值化综合利用存在的循环利用率低，管理体系欠缺，政策立法不够全面等问题，提出应建立健全法律法规和回收体系，构建循环利用产品标准及准入机制，加快技术与综合利用模式的创新。     

基于TIA和PLC的全自动ABS塑料电镀控制系统设计

针对传统的ABS塑料电镀生产线自动化程度偏低、适用性差、生产成本较高和维护管理难度大等问题,设计开发了以S7-1200 PLC和博途TIA Portal为核心的ABS塑料电镀生产全自动控制系统。利用S7-1200 PLC设计主、从站控制系统,通过主站监控和管理电镀生产过程,通过从站输出控制电镀设备。在博途TIA Portal平台上设计上位机操作面板和PLC控制程序,既满足不同形状规格、牌号和用途的ABS塑料制件的电镀生产需求,又为工艺人员提供易于操作、维护和管理的应用功能。实际调试表明,所设计的系统能按照电镀工艺设定输出控制信号、反馈生产数据,实现了对电镀生产流程和工艺条件的高效监控。     

基于拖曳式瞬变电磁法的渠堤工程快速检测技术研究

针对渠堤工程内部隐患巡查线路长、效率低的问题，研发了拖曳式高精度瞬变电磁系统；为了便于拖曳及快速发现异常，采用小回线、大电流的设计方案，通过恒压钳位技术减少了电流关断时间，并设计了跨环削耦线圈用于剔除互感现象；参照航空瞬变电磁的研究方法，采用快速成像算法来实现数据的快速解译；经过测试验证了该系统的适用性，并通过黄河大堤某排污管及南水北调中线某倒虹吸探测实例印证了拖曳式瞬变电磁法的有效性和优势。     

Numerical investigation of light gas release,stratification and dissolution in TH22 test facility using 3-D CFD code GASFLOW-MPI

An accurate prediction of the hydrogen behaviors in the accident and management process is a crucial topic for both the hydrogen safety assessment and safety analysis in the confined enclosure like the containment of the nuclear power plant (NPP). Hence, the hydrogen behaviors including the transient light gas release, stratification and dissolution in the TH22 test facility for the NPP containment are analyzed and compared using the 3-D CFD code GASFLOW-MPI in this study. In this paper, the light gas helium is adopted as a substitute for the hydrogen in the calculations in accordance with the experiment. Firstly, the detached eddy simulation (DES) turbulence model, 3-D numerical model and experiment setup are introduced. Then, the hydrogen behaviors with the GASFLOW-MPI including the light gas release, stratification and dissolution are analyzed and validated with the experiment data. In addition, the velocity profiles, light gas concentrations, dimensionless numbers and temperature distributions are evaluated for the characteristics of the hydrogen behaviors. The results indicate that the calculation results agree well with the experiment data. Foremostly, the relative errors between the calculation results and experiment data during the phase of the dissolution of the light gas cloud are within 11.9%. Meanwhile, the relative errors of the time for the complete dissolution during the phase of the dissolution of the light gas cloud are within 5.0%. For the light gas release and stratification phase, the jet flow dominates as the Froude (Fr) number exceeds 10 during the time t = 600 s–800 s. Additionally, the time averaged centerline velocity and light gas concentration after the potential core region decay with a slop of 1/z which coincide with the theoretical jet limit. Lastly, the light gas concentrations and temperature distributions in all three phases are captured clearly with the GAFLOW-MPI. It demonstrates that the GASFLOW-MPI can accurately described the details of the related hydrogen behaviors in the accident and management process in the confined enclosure like the NPP. This paper can provide guidance for the numerical computation of the hydrogen safety issues in the confined space.     

Effect of agitation pretreatment on anaerobic digestion of swine manure

This study evaluated the effect of mechanical agitation pretreatment on anaerobic digestion (AD) of swine manure (SM). The results showed a remarkable increase in soluble polysaccharides, soluble proteins, and soluble chemical oxygen demand (SCOD) by 82.42%, 121.17%, and 114.89%, respectively, after the SM being agitated for 22 h. No improvement in the volatile fatty acids (VFAs) yield was observed during the agitation pretreatment. Apparently, agitation significantly accelerated the hydrolysis of SM, while it did not seem to enhance the acidification step. Batch AD experiments showed an improved accumulative methane yield by 77.89% with the pretreated SM compared to raw SM.     

Effects of Temperature on the Properties of Ni–Co–BN (h) Nanocomposite Coating in Jet Electrodeposition

Protection of Metals and Physical Chemistry of Surfaces - Ni–Co–BN (h) nanocomposite coating was prepared by jet electrodeposition (JED) under different temperatures. The surface...     

火成岩发育区钻井液技术研究与应用

渤海某油田古近系发育火成岩,且火成岩的发育情况差异较大.水敏性火成岩地层存在很多情况,如安全钻井周期短,钻井作业过程中易出现憋压、蹩扭矩、井眼坍塌、卡钻、出新井眼等复杂情况,事故频发.针对此类情况,形成以"物理+化学"井壁固化技术及PF-AquaTrol高效抑制剂协同盐类的综合抑制技术为主的高性能水基钻井液技术,达到井壁稳定的效果,延长安全钻井周期,提高生产时效,平均生产时效提高10％,倒划眼时效提高70％.     

低温捕收剂BK421浮选内蒙某萤石矿应用研究

本文基于Gemini技术理念，研制合成了新型耐低温捕收剂 BK421。针对内蒙某萤石矿，实验室研究结果表明，BK421作为捕收剂，常温浮选时，粗精矿中CaF2回收率比油酸高7个百分点；浮选矿浆温度低至10.5℃时，粗精矿中CaF2回收率比油提高39个百分点。工业生产中， BK421替代油酸在矿浆平均温度11℃条件下浮选萤石，累计获得CaF2品位97.26%的精矿，实际回收率为82.53%，具有较高的工业应用推广价值。