Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Research on Improving Drying Technology For Sewage Waste Using Direct Flotation Using Heat Storage Media

축열메디아 활용 직접부상방식을 이용한 하수찌꺼기의 건조기술 향상에 관한 연구

  • Received : 2023.10.27
  • Accepted : 2023.11.29
  • Published : 2023.12.30
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Abstract

This study was conducted to improve energy efficiency and problems such as clumping and fouling in the glue zone that occur in the moisture content range of 40 to 60% when sewage dehydration residue is directly fed into the dryer. The temperature of the hot air is low at 270~300℃, and the paddle-type flotation method and dehydrated residue are applied to the circulated heat storage media to increase the contact area with the hot air, thereby reducing energy recovery and gas emissions. The water content of the dried residue is 2.7. ~7 .5%, the heat of evaporation of moisture was 608.0~690.6 kcal/kg·H2O, which confirmed an energy saving effect of about 8.8% compared to the heat of evaporation of moisture of 714.5 kcal/kg·H2O when no heat storage media was used.

본 연구는 하수 탈수찌꺼기가 건조기에 직 투입되는 경우 함수율 40~60% 구간에서 발생하는 Glue Zone에서 뭉침 및 Fouling 현상 등의 문제점 및 에너지효율 개선을 하기 위해 수행하였다. 열풍 온도는 270~300℃로 낮게, 패들타입의 부상방식과 순환되어진 축열 메디아에 탈수찌꺼기가 도포되어 열풍과의 접촉면적을 증대시켜 에너지 회수 및 가스 배출량을 감소시켰으며, 건조 찌꺼기의 함수율은 2.7~7.5%, 수분 증발열량은 608.0~690.6kcal/kg·H2O로 축열 메디아 미투입 시 수분 증발열량 714.5 kcal/kg·H2O과 비교하여 약 8.8%의 에너지 절감 효과를 확인하였다.

Keywords

Acknowledgement

본 논문은(주)화인테크/(주)에이치엠텍의 지원을 받아 수행 되었습니다.

References

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