How to calculate the filtration area of micron-level filters
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Based on the initial pressure drop, maximum allowable pressure drop, and filtration accuracy required by the process, a flow-pressure difference curve is determined according to these pressure drop requirements. The flow rate of the filter element is then determined using this established flow-pressure difference curve, thereby allowing for the selection of the appropriate number of filter elements. How do I read this flow pressure difference curve? ?
Filter manufacturers must have this data, right?
This post was last edited by lupg on 2019-8-24 09:31. 1. On the flow differential pressure curve, a specific area is usually specified as a condition; otherwise, the curve loses its meaning. 2. For thicker filters such as wire meshes, the actual filtration area can be calculated based on the wire diameter and mesh count. However, the channels in micron-level filtration elements are irregular, making it difficult to describe them using the actual filtration area; instead, the surface area of the element is used. 3. The initial pressure drop required in a manufacturing process shouldn’t be fixed; once the flow-pressure drop curve is determined, using a larger area or more filter elements can reduce the initial pressure drop, which is beneficial for the process and helps extend the service life of the entire filter. 4. The filtration precision at the micron level is not an absolute value but rather a relative one. The precision is slightly lower when using a new filter element; as the filter cake is formed, the filtration precision improves and the pressure drop increases accordingly