Preparation Technique of Foam-Floater to Level Gauge of LPG Tank with High Pressure

LPG 고압탱크 레벨 게이지(Level Gauge)용 발포부표 제조 기술

  • Kim, Byoung-Sik (Department of Chemical & Biochemical Engineering, Dongguk University) ;
  • Hong, Joo-Hee (Department of Chemical & Biochemical Engineering, Dongguk University) ;
  • Chung, Yongjae (KF Incorporation) ;
  • Heo, Kwang-Beom (Department of Chemical & Biochemical Engineering, Dongguk University)
  • 김병식 (동국대학교 생명.화학공학과) ;
  • 홍주희 (동국대학교 생명.화학공학과) ;
  • 정용재 ((주)케이에프) ;
  • 허광범 (동국대학교 생명.화학공학과)
  • Received : 2006.03.02
  • Accepted : 2006.07.14
  • Published : 2006.08.10


The purpose of this study is to invent the preparation technique of the foam-floater used as a level gauge of liquefied petroleum gas (LPG) tank under high pressure, which has not only closed pores but also has under 5 wt% changingrate in case of depositing 72 h in room-temperature LPG. In pressure-resistance and deposition experiment, the prepared foam-floaters with different sulfur (325 Mesh and 400 Mesh) and foaming agent (dinitrosopentamethylenetetramin; DPT and azodicarbonamide; AC) had a marginal difference in its weight changing-rate. However, the prepared floater with sulfur 400 Mesh and the foaming agent AC had smaller pores and higher closed pore-rate. Under $50kg_f/cm^3$ hydraulic pressure, the floater with medium thermal (MT) carbon showed a lower weight changing-rate than semi reinforcing furnace (SRF) carbon. Providing a post-treatment to the prepared floater, the hardness and the pressure-resistance of the inner pore-wall of floater were increased. Prepared floaters having a specific gravity below 0.30 were distorted and broken, and other floaters with a specific gravity above 0.35 were not useful as a floater because of the low buoyancy. Therefore, it was considered that the floaters with a specific gravity between 0.3~0.35 are the most useful as a floater under $50kg_f/cm^3$ pressure-resistance.


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