Why can the rich liquid filter use automatic backwashing, while the lean liquid filter cannot and must be cleaned manually every shift?
Thread Content
Our plant uses AMIAD for its liquid-rich filters, which are imported from Israel. However, the lean liquid filter uses a steel-wound filter screen and activated carbon for filtration, and the filter must be manually removed at the end of each shift before being rinsed with steam.
Automatic backwash filters can be used in all cases!
It’s all decided by the design institute; considering issues such as funding, backwashing can actually be used in all cases
Traditional differential pressure filters (self-cleaning filters) can only be used in the field of coarse filtration. The main reason for this is that when high-precision filter membranes are used, the filter unit lacks a reliable high-pressure backwashing function; as a result, the filter membranes cannot be thoroughly cleaned once they become clogged, preventing them from regaining their efficiency, and thus causing the filter to fail to operate properly. I found this online. For our 35,000-ton and 55,000-ton sulfur recovery lean liquid filters, both use filter screens and activated carbon for filtration; for the newly installed 120,000-ton unit, we are considering using an automatic system – we’re not sure if that will work
It’s probably due to the process flow; backwashing the lean liquid can cause fluctuations in the amount of lean liquid in the downstream units, while with the rich liquid, there is a buffer effect provided by the flash tower.
I don’t know the specific structure of your filter. I have come across a type of filter with automatic backwashing, but I dare not use it with rich liquid – the backwashed rich liquid is discharged into a lower-level tank, which is unsafe.
They all exist; it depends on the process selected by the design institute and the process engineers.
The design institute only does the planning; it has no idea what the actual conditions on site are. Forcing the workers on site to keep doing these labor-intensive and costly tasks day after day. How much would it cost to use an automatic backwashing system?
Even if automating the product is expensive, it’s at most the cost of one year’s labor; in the long run, automation still saves money
Why is the effluent filter cleaning so poorly? Is the pressure difference set too high?
Using automatic backwashing for lean amine solutions is feasible; various approaches can be considered. For automated, precise filtration and backwashing, a clustered design can be employed, though it requires significant investment； To worry about fluctuations, one in use and one as a backup can be employed.