Fuzzy logic control of a reverse flow reactor for catalytic oxidation of ventilation air methane

Fuzzy logic controllers of type-1 and type-2 were implemented to deal with the high nonlinearities and uncertainties in operation of a reverse flow reactor (RFR) for catalytic oxidation of ventilation air methane (VAM). The results indicated that the fuzzy logic controller is distinctly superior to the traditional logic-based controller and works well under the conditions with high nonlinearities and uncertainties. Owing to the robustness of RFR and particular control aim of regulating bed temperature within a relatively broad range, a fuzzy logic controller of type-1 is sufficient to cope with the uncertainty brought by the extensive variation of VAM concentration.     

Internet of Things cloud enabled MISSENARD index measurement for indoor occupants

Thermal comfort is an important factor in human body. It can seriously impact on the livelihood factors of human such as lifestyle, productivity, societal activity, and health of an individual. It holds tremendous adverse affect toward diminishing of tolerance to other environmental hazards too. In this paper, an Internet of Things based cloud enabled measurement of MISSENARD index is proposed. A prototype system is implemented based on the proposed novel architecture for measuring thermal comfort of the indoor occupants. The system is developed to apprehend the Internet of Things based multiple cloud services as an important enabler for conferring to MISSENARD index monitoring in real time. The developed system holds a novel way of smarter integration of sensor fueled data analytics with cloud supported visualization at the same time. It further validates the usability of several plug-ins, different Application Programming Interfaces (API), heterogeneous network communications, and low power, memory constrained yet cost effective processor altogether to testify the underlying theory of Internet of Things to become prevalent into a reality.     

包钢炼铁厂降低中速磨废料排出量的措施

包钢炼铁厂喷煤系统中速磨废料排出量大,既浪费资源又影响台时产量,近几年一直在摸索如何降低废料排出量。2001年通过改造中速磨喷嘴环,调整系统参数,废料排出量大幅降低。文中对此次改造的措施及效果进行了分析总结。     

精制卤水中含盐泥问题初探

针对精制卤水中含有盐泥的问题,从反应时间、絮凝剂添加、转料及过滤等几方面进行深入探讨,分析了盐泥可能存在的原因,并提出了切实可行的改造方案,对生产运行进行了优化,取得了很好的效果.     

谈如何提高工业锅炉热效率

以4 t/h以上的链条锅炉为例,结合实践工作经验,从锅炉的选用、燃烧的调整、清垢、除灰方面阐述了如何提高锅炉的热效率,指出应加强锅炉的日常运行管理,发现问题及时处理,从而提高能源利用,实现节能减排。     

Optimization Process of an Air Dense Medium Fluidized Bed Separator for Treating High-Ash Non-coking Indian Coal

The performance of an air dense medium fluidized bed separator, used for coal cleaning, is significantly affected by the operating process parameters. Proper estimation of these parameters is of great importance from both operational and control standpoints. The existing literature reveals that the optimum operating range for these parameters has been experimentally determined by pursuing a traditional “one variable at a time approach” which fails to consider parameter interactions and sometimes misleading, especially when the behavior of two process parameters changes as a function of a third parameter. It is realized that the interrelationship among these process parameters have a significant effect on the overall performance of this separator. In this study, a detailed investigation is carried out to examine the interdependencies among these parameters and their interactional effect on the separation performance of an air dense medium fluidized bed separator. Response surface methodology is used for this purpose and empirical models for two key response parameters, namely, product ash content and combustible recovery, are developed. These empirical models are utilized to establish the new levels of the parameters to achieve the optimum performance of the equipment and subsequently these model predictions are validated against the experimental results. Preliminary results show a strong interaction among some operating parameters.     

两亲聚合物对湿法磷酸的助滤性能及机理研究

以实验室自制单体A、丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)为原料,过硫酸盐氧化还原体系为引发剂,采用水溶液共聚法合成一种用于湿法磷酸助滤的两亲聚合物PADA-10。对所得聚合物的助滤性能进行研究,结果表明:磷酸料浆体系中加入PADA-10后,过滤速度提高了约4.3倍,滤饼水分降低了约10.8%。对PADA-10助滤机理的初步探究结果表明:PADA-10能在一定pH值范围内中和磷石膏表面电荷,使磷石膏微晶絮凝成团,添加PADA-10后滤饼的孔隙率增加;同时,PADA-10能增强磷石膏颗粒的疏水性,使磷酸滤液表面张力降低了5.2 mN/m,磷石膏表面接触角增大了3.4°。     

炭黑废水的处理现状与发展

主要阐述了炭黑废水的产生,危害和几种处理方法以及炭黑处理新的发展趋势。回收的炭黑可以变废为宝,重新被利用。     

Differential effects of air conditioning type on residential endotoxin levels in a semi‐arid climate

Residential endotoxin exposure is associated with protective and pathogenic health outcomes. Evaporative coolers, an energy‐efficient type of air conditioner used in dry climates, are a potential source of indoor endotoxins; however, this association is largely unstudied. We collected settled dust biannually from four locations in homes with evaporative coolers (n=18) and central air conditioners (n=22) in Utah County, Utah (USA), during winter (Jan‐Apr) and summer (Aug‐Sept), 2014. Dust samples (n=281) were analyzed by the Limulus amebocyte lysate test. Housing factors were measured by survey, and indoor temperature and relative humidity measures were collected during both seasons. Endotoxin concentrations (EU/mg) were significantly higher in homes with evaporative coolers from mattress and bedroom floor samples during both seasons. Endotoxin surface loads (EU/m²) were significantly higher in homes with evaporative coolers from mattress and bedroom floor samples during both seasons and in upholstered furniture during winter. For the nine significant season‐by‐location comparisons, EU/mg and EU/m² were approximately three to six times greater in homes using evaporative coolers. A plausible explanation for these findings is that evaporative coolers serve as a reservoir and distribution system for Gram‐negative bacteria or their cell wall components in homes.     

某型指挥控制组合的设计

指挥控制组合属于某型火控计算机系统中的一部分，用来接受火控计算机主机以及雷达送来的工作状态信号（有／无诸元，跟踪／搜索，最佳射击）和飞行状态信息（ D、V；H、tf；D、DK；）。接受的同时，实时显示并报读，供指挥员观察和决策，以选择最佳时机发出击发命令。