Method for determining corresponding relation between absolute filter precision and bubble breaking point

Abstract

The invention discloses a method for determining the corresponding relation between absolute filter precision and a bubble breaking point. The method comprises the steps as follows: (1) aiming at a laminated filter; (2) determining the absolute filter precision of a filter disc by measuring a maximum depth value of a circulating channel on the filter disc; (3) simulating a practical using state of the filter disc through an experiment design; (4) measuring the bubble breaking point of the filter disc through a test; and (5) carrying out depth measurement and bubble breaking point measurement by selecting the filter discs with different maximum circulating channel depths, and determining the corresponding relation between the absolute filter precision and the bubble breaking point. According to the method, the characteristics of the laminated filter are fully utilized, the test can be repeated, the required test equipment is greatly simplified, the test cost is greatly reduced, and the test time is saved.

Description

technical field [0001] The invention relates to a method for determining the corresponding relationship between the filter's absolute filtration accuracy and the bubble breaking point, which is suitable for a laminated filter using a groove on a filter sheet as a filter flow channel. Background technique [0002] Filtration accuracy is an important performance parameter of filter products. According to the definition, the absolute filtration accuracy is the diameter of the largest hard spherical particle that the filter can pass through under the specified experimental conditions. In the traditional absolute filtration accuracy test method, special glass beads are added to the test medium and passed through the tested filter, and the maximum particle size measured in the filtered medium is taken as the absolute filtration accuracy of the filter. This test is a destructive test. The process contaminates the filter itself, and excess material introduced during the test remain...

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Problems solved by technology

[0004] However, the shortcomings of the above method are mainly reflected in: (1) the absolute filtration precision test method is a destructive test, and the tested filter and filter element will not be able to be used normally in the future; (2) when determining the relationship between different absolute filtration precision and bubble breaking point, It is necessary to use multiple test pieces to complete the relevant tests, and the test cost is high; (3) the absolute filtration accuracy test needs to use standard glass beads, and use a particle counter to measure the size of the glass beads in the downstream test medium, and the test equipment is complicated

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