삼중 다공판형 용매추출탑에서 분산상 체류량에 대한 연구

조병렬(Byung Real Jo),황성태(Sung Tai Hwang) 大韓環境工學會 1995 대한환경공학회지 Vol.17 No.10

분무형 나트륨 화재시 에어로졸 크기 및 분포에 관한 연구

조병렬(Byung Real Jo),권상운(Sang Woon Kwon),최종현(Jong Hyeun Choi),정원명(Won Myung Choung),황성태(Sung Tai Hwang) 大韓環境工學會 1995 대한환경공학회지 Vol.17 No.3

삼중 다공판형 맥동탑에서 액적크기 및 분포에 대한 연구

조병렬,황성태,이보성 ( Byung Real Jo,Sung Tai Hwang,Bo Sung Rhee ) 한국공업화학회 1995 공업화학 Vol.6 No.6

삼중 다공판형 맥동탑에서 평균액적 크기와 분포에 대한 연구를 수행하였다. 맥동탑은 직경이 4.65㎝이고, 유효 높이가 6m이며, 다공판의 hole 크기가 2.5㎜이며, 개공비가 30%인 삼중 다공판으로 구성되어 있다. 실험은 물질전달이 있는 계와 없는 계에서 실시하였으며 물질 전달이 있는 계로는 40% TBP(Tri-butyl phosphate)/dodecan-2N HNO₃UNH(uranyl nitrate hydroxides) 용액을, 물질 전달이 없는 계로는 40% TBP(tri-butyl phosphate)/dodecan-2N HNO₃ 수용액을 선정하여 수행하였다. 맥동탑 내에서의 평균 액적 크기 및 분포는 사진촬영으로 측정하였다. 맥동탑 내에서 액적크기 분포는 Mugele-Evans 분포를 이용하여 해석할 수 있었다. 액적의 평균 크기는 맥동탑 높이, 맥동속도, 분산상 공탑 속도가 증가할수록 감소하였으며, 연속상 공탑 속도에는 거의 영향을 받지 않았다. 또한 연속상에서 분산상으로 물질전달이 있는 경우가 물질전달이 없는 경우보다 평균액적크기가 더 크며, 삼중다공판형 맥동탑 내의 평균액적크기가 표준형 맥동탑 내의 평균액적크기보다 큰 값을 가졌다. This work has been carried out to study the mean diameter of drop and its distribution in a pulsed column with three manifold plate type. The column, which is 4.65㎝ of diameter and 6m of effective height, is consisted of three manifold perforated plate groups having 30% of free area and 2.5㎜ of hole diameter. The experiments were performed for systems with and without mass transfer, and then, the experimental systems were chosen UNH(uranyl nitrate hydroxides)-40% TBP (tri-butyl-phosphate)/dodecan and 2N HNO₃-40% TBP/dodecan, respectively. The droplet size in pulsed column was determined by photographic method. The droplet size distribution can be interpreted by Mugele and Evans distribution. The mean size of droplet has been decreased with increasing of pulsed column height, pulsed velocity and dispersed velocity, but it has been affected weakly by continuous flow rates. And also, the mean size of droplet with mass transfer was larger than that without mass transfer, and the mean size of droplet in pulsed column with three manifold plate type was larger than that in pulsed column with standard plate type.

용매추출탑에서 액적크기와 분산상 체류량에 대한 해석

조병렬,김광렬 ( Byung Real Jo,Kwang Yul Kim ) 충북대학교 산업과학기술연구소 1996 산업과학기술연구 논문집 Vol.10 No.1

Abstract_Roman This work has been carried out to study of drop size and dispersed phase holdup in solvent extraction column. The column, which is 4.65cm of diameter and 6m of effective height, is consisted of three manifold perforated plate groups having

회분식 발효조에서 미생물을 이용한 라군 슬러지 질산염 폐액의 탈질 공정 평가

오종혁,이오미,황두성,최윤동,황성태,조병렬,박진호,Oh Jong-Hyeok,Lee O-Mi,Hwang Doo-Seong,Choi Yun-Dong,Hwang Sung-Tae,Jo Byung-Real,Park Jin-Ho 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.2

It is a serious task to the decommissioning of the uranium conversion plant that the demolition of the lagoon sludge. The main component of the sludge is ammonium nitrate and that is the very explosive material. Therefore, the bio-denitrification is a attractive process to remove the nitrate. In this work, some process variables was tested such as incubation temperature, nitrate concentration, electron donor, C/N ratio, seeding ratio, and pH with an anaerobic bacteria as Pseudomonas halodenitrificans. The results would be used as basic data to the continuous bio-denitrification process.

입자 크기 및 분포가 유동층의 압력 요동 특성에 미치는 영향

박상찬,조병렬,홍성선 ( Sang Chan Park,Byung Real Jo,Sung Sun Hong ) 한국공업화학회 1995 공업화학 Vol.6 No.1

기체-고체 유동층에서 압력 요동의 통계적 처리방법을 이용하여 유동층 거동을 해석하였다. 측정압력 요동 통계 특성치는 평균값과 표준편차, power spectral 밀도 함수 등이다. 압력 요동의 표준편차는 최소 유동화 속도를 예측하고 유동화 현상을 설명하는데 효과적이며, 압력 요동의 표준편차와 주진동수는 고체 입자의 크기 및 분포의 영향을 받았다. 압력 요동의 표준편차는 균일계의 경우 입자크기가 증가할수록 증가하였으며, Rosin-Rammler분포와 Gaussian 분포에 대해서는 입자 분포의 표준편차가 클수록 압력 요동의 표준편차가 감소하였다. 압력 요동의 주진동수는 균일계의 경우 입자크기가 증가할수록 감소하였으며, Rosin-Rammler와 Gaussian 분포의 경우에는 분포의 편차가 클수록 증가하였다. The pressure fluctuations in a gas-solid fluidized bed has been analysed using statistical method interpreting fluidized bed behavior. The statistical properties of the pressure fluctuations calculated are the mean, the standard deviation, and the power spectral density function, etc. It has been found that the standard deviation of the pressure fluctuations can be effectively used for predicting minimum fluidizing velocity and explaining the fluidized phenomena. The standard deviation and frequency of the pressure fluctuations have been affected by the particle size and its distributions. The standard deviation of pressure fluctuations have been increased with particle size for its uniform distribution, but have been decreased with deviation of distribution for Rosin-Rammler and Gaussian distribution. The major frequency of the pressure fluctuations have been decreased with increasing particle size for uniform distribution, but have been increased with deviation of distribution for Rosin-Rammler and Gaussian distribution.

표면연소모델을 이용한 풀형 화재 현상 해석

趙炳烈 충주대 2001 한국교통대학교 논문집 Vol.36 No.2

The objective of this study is to study on the characteristics of sodium pool fires.The surface combustion model(SOFIRE Ⅱ) was used, because of its simplicity, for the analysis of sodium pool fire in a containment vessel.As a result, it was turned out that this model showed the overestimation results about the combustion rate, sodium temperature and gas pressure in comparison with experimental results.

나트륨 화재 유형별 연소현상 해석

조병렬 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.2

Liquid metal reactor(LMR) of the most promising energy source in the 21st century, uses liquid sodium in stead of water as a coolant, which is one of saliant features comparing with conventional PWRs. Therefore the acquisition of liquid sodium handling technology should be preceded for the LMR development and the present study on the sodium coolant safety is an essential task in the LMR research and development. As for sodium handling and safety, the technologies for protection from sodium fire should be acquired. For that reason, the characteristics of liquid sodium fire occurring when the hot sodium make a contact with the air are understood. The objective of this study is to study on the analysis of phenomena of the combustion for the type of sodium fires. The variables of experiment were the temperature, pressure and aerosol size etc. A pool fire was experimented after filling the pan with undispersed liquid sodium inside a closed test vessel. The pressure and temperature inside test vessel were measured, and the characteristics of pool fire due to the intial concentration of oxygen was analysed. For a spray fire experiment, liquid sodium was injection into the upper part of the test vessel in a dispersed state through a spray nozzle. The pressure and temperature of gas inside the test vessel was measured, and the characteristics of the spray fire due to the temperature of injected sodium was analysed.

나트륨 순도관리 기술평가

조병렬 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.2

The purity control of high temperature liquid sodium is very important just like that of LWR. Sodium oxide and/or hydrogen gas are easily generated by the reaction of liquid sodium with trace amount of oxygen and/or moisture leaked from the exterior. It is required to understand and acquire the removal mechanism of sodium oxides and other impurities in the coolant system for avoiding long-term shutdown caused by excessive level of impurity. Therefore, it is very important to monitor oxides concentration and remove these oxides. Accordingly, the purpose of this study provides the basic date for design and operation method sodium purification system.

유동매체에 따른 최소 유동화 속도

趙炳烈 충주대 산업과학기술연구소 2000 産業科學論文集 Vol.8 No.-

The minimum fluidizing velocity in a gas - solid fluidized bed has been analysed by using statistical method to interpret fluidized bed behavior. The experiments were carried out in a fluidizied bed of 6.7 cm - ID, and the experimental variables were three groups(Group A, Group B, Group C) of the fluidizing solid particles distinguished themselves in the fluidization by the Geldart's classification etc. The minimum fluidizing velocity is one of the most important properties in fuidization. The minimum fluidizing velocity can be measured from the average which is time invariant property among the pressure fluctuation data. As a result, the hysteresis along the increase and decrease in the gas velocity has been observed in the uniform sized Group B, but neither in Gaussian and Rosin-Rammler distribution nor in the uniform sized Group A and Group C. And also, it has been found that the standard deviation, which is a square root of second moment of the pressure fluctuations can be effectively used to predict minimum fluidizing velocity and to show the distinguishable patterns of the fluidized phenomena.