I ran into an awkward problem: the use of the filter
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This post was last edited by shiwendong on 2017-1-2 21:16. I ran into an awkward problem: so-called experts claim that the flow rate when using an 80-mesh filter in oil storage tanks can generate static electricity, which may lead to fires. On January 1, 2017, a loading system platform was installed at a certain oil depot in Xi’an; the pipeline platform consisted of a gate valve + 30-mesh filter + pump + check valve + gate valve + 30-mesh filter + ball valve + mass flow meter + anti-static device + piston-type electro-hydraulic valve + ball valve + dip pipe. There was a lot of debris inside the new pipelines, which caused the gate valves and check valves to get clogged with debris such as sand and welding slag, preventing them from closing properly. The mass flow meter and piston-type electro-hydraulic valve also became clogged with debris. It is recommended to install a filter with a mesh size of 60 to 80. It won’t cause debris to get stuck in the valves of the system platform; the filter mesh is too coarse to capture such debris. Well, here’s the problem: experts say that when filters with a mesh size of 60 to 80 mesh are used in oil depots, the flow rate can generate static electricity, which may lead to fires. I asked the expert: What is the basis and evidence for this? Experts can’t say either: L. It is said that filters with a mesh size of 60 to 80 cannot be used, and the pipes are equipped with anti-static devices. What are everyone’s thoughts on this issue?
Before starting operation, use a temporary filter with a high mesh count, cone-shaped
Static electricity can’t cause a fire either, right? There’s no oxygen in the fluid, so there’s no environment for combustion
When driving the machine originally, the medium in the pipeline is relatively dirty, so a filter with a high mesh size can be used for preliminary filtration. After running it for a while, switch back to the originally designed filter. The mesh size of the filter is determined based on factors such as the flow rate of the medium, the amount of impurities in it, and the required precision of the process. As long as the pipes and valves are properly grounded electrically, static electricity will not cause a fire
Aren’t all pipes grounded to eliminate static electricity?
Filters should have little impact on static electricity, right? There are static electricity bridging solutions for static electricity! It’s about whether the filter might get clogged, causing the pump to run idle, leading to air entrapment and heat generation in the pump body.
It is essential when the pipeline is electrostatically grounded
For newly installed systems, a temporary filter should be used first; once they have been in operation for some time, the designed filter can then be installed. For liquids, a mesh size of 40 is generally used
With a proper grounding system, there should be no need to worry about static electricity anymore