http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Evaluation methodology on flowability of on-site produced slaked lime
( Kyohei Gonda ),( In-hee Hwang ),( Toshihiko Matsuto ),( Takayuki Matsuo ),( Yasumasa Tojo ),( Ryo Kinoshita ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 심포지움 Vol.2019 No.1
Slaked lime is commonly used as alkali agent for dry scrubbing of hydrogen chloride and sulfur oxides in flue gas discharged from municipal solid waste incinerators (MSWIs). As the utilization amount of slake lime is the most among chemicals used in MSWI, its impact on the operating cost is significant. For this reason, the on-site production of slaked lime was attempted by using cheap quicklime and a simplified hydrator in MSWI. However, the discharge problem of fly ash occurred at the hopper of bag filter (BF) owing to the poor flow property of on-site produced slaked lime when it was tested in the demonstration facility. In this study, we developed lab-scale of flowability tests to evaluate the flow property of produced slaked lime as well as to find the optimum condition of on-site production. First, three kinds of flowability tests were examined to understand the behavior of slaked lime in hopper. Procedure and details of each test method were determined using reference samples: one is commercial slaked lime (MS) which did not occur bridging problems in the demonstration test. The other is on-site produced slaked lime (TR) which occurred bridging problem in the same test. Details of each test were determined as follows: 1) slide test at slope: a specimen with a fixed volume (9 ㎠×6mm) was placed on SUS plate and the inclination of SUS plate was increased. The angle of slide, θ [°] that the specimen was falling from SUS plate was determined; 2) Stirring torque test: 2.5 kg of sample was filled in a stainless container. While the blades attached to the motor were stirred at 1 rpm, the resistance generated was measured as torque, T [Nㆍm]; 3) orifice outflow test: a 400 g of sample in a SUS hopper was discharged through an orifice with diameter 24 to 60 mm. From the relationship between orifice diameter and outflow rate, OD<sub>50</sub> [mm] that 50% mass of slake lime was discharged (OD<sub>50</sub>) was determined. Various kinds of on-site produced slaked limes were prepared to understand the relationship between flowability and production conditions. Molar ratio of distilled water to quicklime (WR), residence time in hydrator, stirring rate, addition of chemical, pulverization strength, etc. were tested as production conditions. Fig. 1 shows that the angle of slide increases as the moisture content of on-site slaked lime increases. As the fraction of particle size less than 5μm increases, both torque and OD<sub>50</sub> increase (Figs. 2 and 3). It was found that the flow property of slaked lime could be improved by reducing the moisture content and the fraction of particle size less than 5μm.
Kyohei Yasuno,Junichi Kamiie,Kinji Shirota 대한수의학회 2013 Journal of Veterinary Science Vol.14 No.2
The renal glomeruli of 12 male Osborne-Mendel (OM) rats 3to 24 weeks old were examined by electron microscopy. Effacement of podocyte foot processes (FPs) developed at 3weeks of age and became progressively worse over time. Loss or dislocation of the slit membrane was also found. Vacuoles and osmiophilic lysosomes appeared in the podocytes starting at 6weeks of age. Podocyte detachment from the glomerular basement membrane (GBM) was apparent at 18 weeks of age. Laminated GBM was occasionally observed in all animals. These features might lead to the development of spontaneous proteinuria and glomerulosclerosis in OM rats.
The Book-keeping Fermion Analysis of the Double Exchange Model with Antiferromagnetic Background
Kyohei Nakano,Yukinori Ohta,Robert Eder,Piotr Wr´obel 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We analyze the double exchange model with antiferromagnetic background by the book-keepingfermion method. First, we consider the motion of a single conduction electron. We assume that thelocalized spins form the N´eel state and the added conduction electron forms only three types of statesunder the strong Hund’s-rule coupling, and we regard these states as the book-keeping fermions. Under these assumptions, we first calculate the spectral functions and find a good agreement withthe results given by the exact diagonalizations for finite-size clusters. We next consider the situationwhere there are finite numbers of spin flips occurring in the down-spin sublattice in the N´eel orderedstate. Considering the effects of the spin defects, we add a new book-keeping fermion and estimatethe energy of the spin defects by a perturbation theory. This theory gives the phase diagramcomparable with the numerical results.