Regarding the filtration area of gas filters
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There is one thing that is unclear, and I would like to ask the following: There are several types of gases, and bucket filters are intended to be used for their online filtration on a continuous basis. Examples are as follows: 1. Steam, with a known flow rate of 43.1 t/hr, pressure of 32 bar, temperature of 238°C, density of 16.2 kg/m3, viscosity of 0.017 cp; the maximum allowable pressure difference is 0.5 bar, and the solid particle size to be filtered out is >20 μm. 2. Hydrogen: known flow rate is 46 kg/hr, pressure is 95 bar, temperature is at room temperature, density is 7.0 kg/m3, viscosity is 0.01 cp; the maximum allowable pressure difference is 0.5 bar. The solid particles to be filtered should have a size of >20 μm. I would like to ask my colleagues how to determine the filtration area of this filter?
I hope experienced friends can help!
The filtration area depends on the filtering element; filtering elements produced by different manufacturers have varying flow capacities under the same conditions. There is a significant difference in flow capacity between filtering elements from domestic and foreign manufacturers, as well as in their performance. It is recommended to consult the manufacturers of filters or filtering elements for more information.
Thank you to the friend above for helping. I wonder if there are any friends on this forum with experience in filter elements; I hope they can provide further answers.
I don’t know! ! ! Or go with something more conservative and go with a larger size!
I agree with the person above; there’s no need to calculate the filtering area separately – it’s better to just use a pre-made filter.
Regarding the selection of filter area, different manufacturers have their own approaches, such as Pall Motto and AnTai Technology in China. But the basic principle is the same: the volume of gas to be filtered (m3/min) divided by the space velocity of the filter (m/min) equals the required filtration area in m2. Generally, the value of space velocity varies depending on the manufacturer and the type of filtration system used. You can find a manufacturer to give you an introduction. Send me a message for a detailed discussion!
I work in filtration exactly. The filtration area is inversely proportional to the initial pressure difference. However, the initial pressure difference is related to the filter and filter media as well as the pipes, and it is also greatly influenced by the specific filtering products chosen. Generally, results obtained solely from data on the first floor are not very realistic; in many cases, experience is taken into account. I’ve attached an empirical formula I use to calculate the filtering area; everyone is welcome to discuss it. This post was last edited by FILTRATION-MAN on 2008-1-23 00:38.]
I’m sorry, OP; my formula is in an Excel sheet, and attachments can’t be uploaded here. Could you give me your email address by EMAIL? I’ll get back to you. Or you can call me directly at 13917574010. My email address is: tianjunbao1975@163.com
Filtering is an unstable operation; it’s better to be cautious!
You can calculate it by yourself as well; for reference, the general formula is air volume (m3/s) = filtration area × flow rate. So, first you need to determine the air volume; it seems you already have the relevant data on that. As for the flow rate, domestic companies generally prefer not to exceed 2 m/s in order to ensure effective filtering (I haven’t encountered this specific operating condition before, so this flow rate is only for reference). With this information, it’s possible to estimate the filtering area. However, since your requirements are clear and you have all the necessary parameters, it’s a good idea to find a supplier who can do the calculations for you. They have experience and know what to pay attention to in your specific situation, so the areas they calculate will be more reliable.
What the person on the 11th floor said makes sense; it’s for your own good. Like it.