Title

PARTICLE BEHAVIOR AT LOWER PART IN CROSS-FLOW MOVING BED TYPE DUST COLLECTOR

PARTICLE BEHAVIOR AT LOWER PART IN CROSS-FLOW MOVING BED TYPE DUST COLLECTOR

Authorship

BANDO, YOSHIYUKI; MATSUBARA, ATSUSHI; NAKAMURA, MASAAKI; SHIBATA, KENJI; YAMADA, MORIO

BANDO, YOSHIYUKI

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MATSUBARA, ATSUSHI

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NAKAMURA, MASAAKI

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SHIBATA, KENJI

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YAMADA, MORIO

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DOI

10.5151/2594-357x-34Red-633-642

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Abstract

A solid-gas cocurrent downflow moving bed was used to suppose the lower part of the front bed in the cross-flow moving bed type dust collector. The particle diameter, the gas flow rate, the rotation speed of roll feeder and the height of particle outlet were changed. The particle behavior was observed, and the discharge rate of particle and the pressure loss were measured. The discharge rate increased gradually with increasing gas velocity. When the gas velocity was beyond a certain gas velocity, the discharge rate of particle extremely increased. This gas velocity was defined as the critical gas velocity. The extreme change like the discharge rate was not found in the pressure loss. The critical gas velocity became lower with increasing height of particle outlet and with decreasing particle diameter, but was independent of the peripheral velocity of roll feeder. The critical gas velocity was expressed by means of the difference between the particle outlet height and the particle diameter. From these results, it was found that the segregation of the small particle in the moving bed led more easily to the abnormal behavior of particles.

A solid-gas cocurrent downflow moving bed was used to suppose the lower part of the front bed in the cross-flow moving bed type dust collector. The particle diameter, the gas flow rate, the rotation speed of roll feeder and the height of particle outlet were changed. The particle behavior was observed, and the discharge rate of particle and the pressure loss were measured. The discharge rate increased gradually with increasing gas velocity. When the gas velocity was beyond a certain gas velocity, the discharge rate of particle extremely increased. This gas velocity was defined as the critical gas velocity. The extreme change like the discharge rate was not found in the pressure loss. The critical gas velocity became lower with increasing height of particle outlet and with decreasing particle diameter, but was independent of the peripheral velocity of roll feeder. The critical gas velocity was expressed by means of the difference between the particle outlet height and the particle diameter. From these results, it was found that the segregation of the small particle in the moving bed led more easily to the abnormal behavior of particles.

Keywords

particle behavior, dust collector, moving bed

particle behavior, dust collector, moving bed