The Journal of Korea Institute of Information, Electronics, and Communication Technology (한국정보전자통신기술학회논문지)

Korea Information Electronic Communication Technology (한국정보전자통신기술학회)
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Physical Properties Analysis for Automated Process Design of Solar Salts

천일염 자동화 공정설계를 위한 물리적특성 분석

  • Kim, Hoon (Division of food safety, distribution and standard, Korea Food Research Institute) ;
  • Kim, Woong (Major in Bio-Mechanical Engineering, Kongju National University) ;
  • Lee, Hyo-Jae (Division of food safety, distribution and standard, Korea Food Research Institute) ;
  • Han, Jae-Woong (Major in Bio-Mechanical Engineering, Kongju National University)
  • Received : 2018.08.01
  • Accepted : 2018.08.16
  • Published : 2018.08.30
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Abstract

In this paper, the particle size, bulk density, friction coefficient and angle of repose were measured for the automatic processing of solar salt, which was classified with 5 levels of moisture content (16.5, 13.2, 8.2, 4.9, 3.7%). Average diameter was 1.98~1.60mm according to moisture content, and bulk density increased with increasing moisture content. As a result of measuring the coefficient of dynamic friction, the maximum value was shown in the stainless steel plate according to the material, and ABS plate and acrylic plate were lower in the order. Movement occurred at the moisture content of 8.2% or less, and the empty angle of repose was increased and the filling angle of repose was decreased as the moisture content increased.

본 논문은 천일염의 기계화 자동화 생산모델 설계에 필요한 입자크기, 산물밀도, 마찰계수 및 안식각 등 설계인자를 구명하기 위하여 천일염의 함수율 5수준(16.5, 13.2, 8.2, 4.9 및 3.7%,w.b.)에서 실험을 수행하였다. 입자크기는 함수율 3.7%에서 1.98mm이였으며, 함수율 8.2%까지는 감소하는 경향이었고, 이후는 다시 증가하는 경향이었다. 산물밀도는 함수율 3.7%에서 $643.5{\sim}675.3kg/m^3$이었으며, 이후 급격히 증가하여 함수율 4.9 및 8.2%에서 672.3~702.8 및 $705.4{\sim}723.1kg/m^3$으로 나타났다. 산물밀도는 함수율이 증가할수록 증가하는 경향이었으며, 입자의 크기보다는 함수율의 영향이 크게 나타났다. 정지마찰계수의 측정한 결과 재질에 따라 스테인레스에서 0.76~1.04로 가장 높게 나타났고, ABS수지, 아크릴 순으로 낮게 나타났다. 정안식각 측정은 함수율 8.2% 이하에서 거동이 발생하였으며, 함수율이 증가함에 따라 배출 안식각은 증가하고 퇴적 안식각은 감소하는 것으로 나타났다.

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