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HWAHAK KONGHAK,
Vol.39, No.4, 438-445, 2001
Vol.39, No.4, 438-445, 2001
접선유입방식 여과포 집진장치에서 내통이 유동장 및 입자거동에 미치는 영향
Effect of an Inner Tube on the Flow Field and Particle Behavior inside a Bag Filter System with a Tangential Inlet
내부에 내통을 설치한 새로운 접선유입 순환방식의 여과포 집진장치에서 여과포 집진장치 내부로 유입된 입자들의 여과포 표면으로의 입자부하(particle loading)를 최소화할 수 있는 최적의 내통 형상을 제안하기 위하여 수치모사(computational simulation)를 이용한 이론적 해석을 수행하였다. 또한 집진용기 바닥면에 침적되어 있는 입자들의 재유입(reentrainment)을 최소화할 수 있는 내통형상도 제안하였다. 수치해석 결과, 내통은 유입입자들의 집진용기 내벽에서 여과포로의 직접 전달을 차단하기 때문에 여과포 표면으로의 입자부하량을 저감시켰다. 여과포 상부 주위에 내통이 설치되는 경우보다는 하부 주위에 설치되는 경우 여과포로의 입자부하량이 감소하였다. 그리고 집진용기 바닥면에 침적되어 있는 입자들의 재유입은 여과포 상부 주위에 내통이 설치된 경우는 내통이 없는 경우에 비해 큰 차이가 없었지만, 여과포 하부 주위에 내통이 설치된 경우는 침적입자들의 재유입량이 크게 감소하였다.
A new bag filter system has been developed with tangential inlet and an inner tube. Computational simulation was performed to suggest an optimum shape of the inner tube which might decrease the loading onto bag filter surface of the particles entering a filter vessel and the reentrainment of particles from the bottom wall of the vessel. According to the com-putational
results, the particle loading onto the bag filter was reduced by obstructing particles moving directly from the near wall of the vessel to bag filters when an inner tube was located around the bag filters. The particle loading was lower when an inner tube covered around the lower part of the bag filters from the turbulent flow recirculating near the vessel wall as the upper part of filters was not covered. Also, the reentrainment of particles from the bottom wall decreased with an inner tube covering around the lower part of filters.
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