화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.6, 620-625, October, 2001
Export Citation
결정화기 구조 및 교반 조건이 니트로 화합물의 결정화에 미치는 영향
The Influence of Crystallizer Geometry and Mixing Conditions on Crystallization of Nitro Compound
남주형, 우상훈, 구기갑†, 함승주1, 임교빈2
  • 서강대학교 화학공학과, 서울 121-742
  • 1연세대학교 화학공학과, 서울 120-749
  • 2수원대학교 화학공학과, 수원 445-743
Joo Hyung Nam, Sang Hoon Woo, Kee Kahb Koo†, Seungjoo Haam1, and Gio Bin Lim2
  • Department of Chemical Engineering, Sogang University, Seoul 121-742, Korea
  • 1Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea
  • 2Department of Chemical Enginering, the University of Suwon, Suwon 445-743, Korea
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초록
배플의 유무, 교반 조건에 따라 결정화기 내의 복잡한 난류 흐름을 전산 유체 역학 기법을 도입하여 해석하였다. 냉각법에 의한 니트로 화합물의 재결정화 실험 결과를 전산 모사에 의한 용액의 난류 혼합 상태 및 소산 에너지 계산 결과를 이용하여 비교 분석하였다. 본 실험 범위 내에서 준 안정영역을 냉각 속도와 소산 에너지의 함수로 나타내었다. 니트로 화합물 결정의 입도 분포, 형상 및 수율은 결정화기 구조 및 운전 조건에 따른 용액의 혼합 조건에 대단히 민감함을 알 수 있었다.
A computational fluid dynamics technique was employed to analyze complex turbulent flow phenomena in a crystallizer with/without baffles and with various agitation rates. Through a computational fluid dynamics, mixing intensities and turbulent dissipation energies were calculated at various conditions and were utilized to interpret the experimental data of crystallization of nitro compound by a cooling method from aqueous solution. In the present experimental range, metastable zone widths were correlated as a function of the cooling rate and the dissipation energy. Crystal size and distribution, shape and yield of nitro compound obtained were found to depend strongly on the mixing conditions which is determined by the crystallizer geometry and operation conditions.
Keywords:crystallization;mixing intensity;dissipation energy
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