Strategy and consequence of intermittent segmented pulse-jet cleaning for long-box-shaped filter dust collector

摘要

This study investigated the influence of the intermittent segmented pulse-jet cleaning strategy for dust collectors on their filtration pressure drop, dust emission concentration, and detached dust migration. An experimental pulse-jet cleaning dust collector with 6 filter cartridges in line was designed. The intermittent segmented pulse-jet cleaning was simulated. The air volume, filtration pressure drop, and dust emission concentration were tested, and the resistance to airflow through the cartridge was calculated. The pulse-jet cleaning parameters, including positive and reverse cleaning orders, online and offline conditions, single-row and dual-row pulse-jet modes, and maximum allowable pressure drop, were analyzed. Re-capture (captured again by the just cleaned filter) and sec-capture (secondary captured by other filters) rates of the detached dust from the cleaned filter cartridge were defined and calculated. This study has demonstrated that the cleaning order has remarkable influence on the operation performance. The positive cleaning order leads to lower residual pressure drop, more uniform residual dust on the cartridges, and higher dust emission concentration during the cleaning affected stage. More obvious re-capture and sec-capture phenomena are found in the reverse cleaning order, with re-capture and sec-capture rates of 17.86% and 10.00%, respectively. This study is useful for optimizing the design of dust collector cleaning. (C) 2018 Elsevier B.V. All rights reserved.