Process issues of bag filter systems
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What is the difference between installing the fan of a bag filter at the front and at the back of the filter? What are their respective advantages? In factory cases, it has been observed that fans are installed at both the front and rear of bag filters – why is this? (There were multiple mechanical dust collectors prior to the front-end fan, such as gravity dust collectors); why not consider installing a fan with sufficient air handling capacity?
This question is too narrow; it would be better to specify the services that this filter is intended for within the process. There are also many types of bag filters; some are designed for switchable dust removal, while others are for continuous dust removal. It is best to understand the target audience being served and the principle by which the filters function within the process.