Technical help: How to clean the elements of a security filter

Security filters are generally replaced only after 3 to 6 months of use; it’s likely that there are many solid impurities in the wastewater feed from upstairs. The quality of the incoming water should be assessed, and appropriate measures taken accordingly. What type of wastewater causes water intrusion upstairs?

This post was last edited by hesonchang214 on 2012-10-15 07:20. I’ve never heard of there being a method for cleaning the filters in security filters; if any member knows about it, they could share that information so everyone can learn from it*~

The last edit to this post was made by hesonchang214 on 2012-10-15 at 07:21. I work in the field of filtration equipment, and I’ve never seen or heard of any method for cleaning melt-blown or wound fiber filter elements. The frequency of replacing them once a month, as mentioned by the original poster, is quite high; it might be advisable to install a bag filter in front of the safety filter, or to use a safety filter with a coarser filtering precision, in order to protect the filters that follow it~

Filter elements are basically disposable, but replacing them every month is a bit too frequent; this is likely due to inadequate pre-treatment. It is recommended to check the pre-treatment system to ensure that the SDI of the water after pre-treatment is below 5.

The vast majority of filter elements are disposable; even if one tries to save money by cleaning them and using them again, the filtering efficiency may not meet the required standards. In such cases, the losses will be greater than the cost of simply replacing the filter element. It is advised not to clean them – I agree with what was said in the previous comments; it’s better to find out the cause right away.

For wastewater reuse projects, when the organic matter concentration is high, even with ultrafiltration prior to it, it is necessary to achieve an SDI value of

There are self-cleaning and multi-media filters in front of the security filter, but it still gets clogged quite frequently! This post was last edited by Welcome on 2009-2-11 16:54 ]

This post was last edited by hesonchang214 on 2012-10-15 07:21. Is the COD of the raw water relatively high? The adhesion of organic substances can also cause clogging of the membranes~

This post was last edited by hesonchang214 on 2012-10-15 07:22. We have a self-cleaning device installed in front of the security filter, followed by a 20-micron filter element for purification; after one month of operation, the pressure difference exceeds 0.2 MPa. The water quality we use comes from exchange columns as well! ~

I’ve never heard of cleaning the elements of security filters; usually, they are replaced with new ones.

Basically, it’s all about replacement; cleaning doesn’t give good results

The COD of the raw water is not high; it is only the ammonia nitrogen content that is high

           The cost of a security filter is just a few dozen yuan; don’t you think your method is a waste of time and effort? Besides, even if this is done, it is not possible to fully regenerate the filter element. Since the filter elements used for security filtration are definitely multi-layered, when you clean them, you can only remove the impurities on the surface of the elements as well as some of those that have penetrated into the inner layers; many other impurities remain undetectable and cannot be removed. In this way, the filter element that you have replaced after cleaning gets clogged again shortly after being installed. Core filters have many bolts, and it’s very troublesome to replace the filter element; have you considered the labor costs involved? Therefore, cleaning the filter element is not cost-effective; it is better to replace it instead.             If the original poster finds such costs to be too high and wishes to reduce them as well as minimize the hassle involved, they can switch to bag filters. Since bag filters have a large filtering area and can handle a large amount of dirt, and their replacement is simple, in terms of long-term usage (over a period of one year), this approach can significantly reduce operating costs and the effort required to replace the filtering elements.

:) Both security filters and ordinary membrane filters can become clogged easily. I know of an FBL filter that works very well. Filtering industrial wastewater results in water quality similar to that of tap water. There is no issue with blockages.

Add a disc filter in front to reduce the load on the security filter.

Generally, melt-blown or wound filter elements cannot be cleaned; the most important thing is to carry out proper pre-treatment. In special cases, the filter element can be placed in an acidic or alkaline solution to see if it dissolves.

Generally, melt-blown or wound filter elements are not cleaned; if cleaning is necessary, the outer layer can be rinsed to remove dust and sediment.

None of these can be cleaned; I really haven’t heard of any place that does this. Pay attention to your preprocessing and check the conditions of the incoming water. In the past, we used to replace it as early as after one week, but now it can generally last around 3 months.

I haven’t seen it yet; the filter elements of the security filter have been backwashed. If contamination is severe, it would be advisable to consider making changes to the pretreatment process. If the original poster finds this washable material, please share it with us when you do.

If the filter elements need to be replaced frequently, it is necessary to consider whether the pre-treatment process is not adequate; the reason for such frequent replacements should be identified, rather than focusing on how to clean the filter elements