宝钢3号高炉冷却壁破损机理的热态试验研究

模拟宝钢3号高炉冷却壁的实际工作条件,建立了国内第一台大型冷却壁热态试验炉。通过测量进水温度、进水速度、炉气温度及热冲击等条件对光面冷却壁热面温度的影响,分析了宝钢3号高炉带凸台冷却壁损坏的主要原因。     

Endocotyle bushi (Trematoda: Microphallidae) from willets, Catoptrophorus semipalmatus from Galveston, Texas

During a study of Digenea of shorebirds from Galveston, Texas, 30% (30 of 99) of willets, Catoptrophorus semipalmatus (Charadriiformes), were found to be infected with 55-405 Endocotyle bushi per infected host. Although the specimens from Texas generally agree with E. bushi from Florida, specimens from Texas are less elongated, have a more triangular to heart-shaped ovary, have slightly larger eggs, and have a smaller seminal vesicle.     

Kikuchi's disease of the neck (histiocytic necrotizing lymphadenitis)

Histocytic necrotizing lymphadenitis (HNL), also known as Kikuchi's disease is a benign self limiting disease of unknown origin. It effects cervical lymph nodes, predominantly in young females. It is well described in the pathology literature, but little is written about this in the ENT literature, as few clinicians are probably aware of this condition. Five cases of cervical Kikuchi's disease are presented with a brief review of the literature.     

1.8 m2/h炭块带锯锯条裂纹分析及锯床的改进

分析了1．8m^2/h炭块带锯锯条裂纹的原因，提出了延长锯条使用寿命的措施。     

Recovery of Amino Acids from Seafood Processing Wastewater with a Dual Chitosan-Based Ligand-Exchange System

Crawfish chitosan, prepared from crawfish shell chitin, was demonstrated to be an effective ligand-exchange column material for recovery of amino acids from seafood processing wastewater. In comparison with commercial chitosan, crawfish chitosan, loaded with copper or amino copper, showed higher recovery rates of amino acids. Recovery from amino copper-crawfish chitosan columns was pH dependent, with reduction at higher pH values. Eluatc was completely free of copper ions when treated with a second crawfish chitosan column. The amino acids recovered by this treatment have potential application as seafood flavors in terms of their sensory attributes.     

An optimal operating window for the Bunsen process in the I–S thermochemical cycle

We searched for the optimal compromised operating conditions for the Bunsen reaction of IS thermochemical water splitting, considering the key concerns of the IS cycle: the liquid–liquid equilibrium (LLE) phase separation performance, the characteristics of water distribution between the sulfuric acid (SA) phase and the poly-hydroiodic acid (HI_x) phase, side reaction occurrence, and the effect on operating costs. Experimental data available from a literature survey were combined, and common trends were examined through a series of parametric studies. Based on the results, the optimal operating point and allowable operating window for the Bunsen reaction have been proposed: the optimal point is represented by 4 mol of excess iodine and 11 mol of excess water in the stoichiometry at temperature of 330 K, while the allowable window ranges over for the excess iodine, for the excess water, and for the temperature. After the Bunsen reaction and LLE phase separation, 5 mol of the excess water is distributed to the SA phase and to the HI_x phase. Operating within this window makes it possible to avoid the side reaction and iodine solidification, to increase the HI concentration well above the azeotropic point in the HI_x section, and to minimize operating costs arising from excess iodine and water.     

Corrosion resistances of alloys in high temperature hydrogen iodide gas environment for sulfur–iodine thermochemical cycle

The hydrogen iodide (HI) decomposition process is a limiting step for the efficiency of the sulfur–iodine nuclear hydrogen production process, owing to its low kinetics and complicated reaction characteristics. Therefore, the Korea Advanced Institute of Science and Technology (KAIST) suggested a simple high-temperature HI decomposition process at 650–700 °C for higher efficiency. For practical application of the high-temperature HI decomposition process, along with the catalyst study, we performed structure material selection and corrosion resistance tests. A number of candidate alloys were considered in various aspects and exposed to the high-temperature HI gas environment, which is extremely corrosive, at 850 °C for 100 h. Nine alloys with different nickel and iron compositions have been tested and analyzed. Test results indicated the degrees of resistances to corrosion of each alloy, on the basis of weight change and cross-sectional micrographs. Thus, because of their resistance to internal oxidation and formation of stable external oxide layers, five types of alloys, Haynes 214, aluminizing and inter-diffusion heat-treated or electron beam surface-treated Alloy 617 are suggested as appropriate candidates for fabricating high-temperature HI decomposer. In particular, surface-treatment of Alloy 617 gave it a high stability because of the resultant formation of an Al-rich layer; this was confirmed by experimental results, so IDHT Alloy 617 is recommended as a suitable structural material for fabricating HI decomposer. However, further long-term testing is suggested to ensure safety and confirm applicability.     

Application of the developed CFD analysis methodology to H2 explosion accidents in an open space

We developed a CFD (Computational Fluid Dynamics) analysis methodology for predicting an overpressure buildup due to a hydrogen explosion as well as the blast wave propagation from the near field to the far field of the hydrogen explosion site with an error range of about ±30% on the basis of test results with the small-scale obstacle at the stoichiometry condition in an open space in the previous research. In this paper, we confirmed the applicability of the developed CFD analysis method to the evaluation of the safety distance between a VHTR (Very High Temperature Reactor) and a hydrogen production facility through the CFD analysis conducted on the HTTR (High Temperature Test Reactor) and the hydrogen production facility in JAEA (Japan Atomic Energy Agency) under an assumption of a hypothetical hydrogen explosion. The application study showed physically reasonable results when compared to the test data performed by SRI (Stanford Research Institute) International, and the CFD analysis methodology is a more useful tool in the evaluation of the safety distance than the MEM (Multi-Energy Method) because the MEM has some drawbacks that it cannot predict an asymmetric explosion phenomenon due to a complicated geometry and an ambient temperature effect on an overpressure buildup. Finally, the developed CFD analysis methodology will be applied to evaluate the safety distance between a VHTR and a hydrogen production facility after KAERI (Korea Atomic Energy Reaches Institute) completes a design work of a VHTR and a production facility.