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공기압 수송에 의한 고체입자의 정량적인 공급

Controlled Feeding of Solid Particles by Pneumatic Transport

HWAHAK KONGHAK, August 1987, 25(4), 336-344(9), NONE
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Abstract

공기압 수송에 의한 고체입자의 정량적 공급을 실험적으로 연구하였다. 모래, 유연탄, 무연탄을 유동층으로 공급하는 경우를 대상으로 하였으며 주요 변수인 오리피스내경, 수송관내경 및 길이, 수송용 공기량, 수송용 공기압력, 호퍼 ΔP 등이 수송량에 미치는 영향을 조사하였다. 실험결과 주어진 수송관 시스템에서 조절이 용이한 "호퍼 ΔP"와 수송용 공기량을 변화시킴으로써 고체 수송량을 제어할 수 있다는 것이 입증되었다. 또한 유동층으로의 공기압 수송에 의한 고체입자 공급시스템의 설계방법도 제시되었다. 한편 수송용 공기의 압력에 의한 영향은 1차적으로 Kinetic Energy만을 고려하여도 그 영향이 예측 가능하였다.
Characteristics of solids feeding to a fluidized bed by pneumatic transport were studied experimentally. Sand, bituminous coal and anthracite particles were used as feed material. Studied variables were orifice ID, length and ID of conveying line, flow rate and pressure of transport air, and "hopper ΔP". It was experimentally proved that feeding rate of solid particles can be controlled by manipulating transport air rate and "hopperΔP", without use of any moving machinery. Design procedures for the pneumatic transport of solid particles to a fluidized bed is suggested as well. We also found that the effect of pressure of transport air can be estimated by considering kinetic energy only.

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