In view of the problem of slow filtration speed by vacuum filter when concentrate contains ultrafine particles, the following methods can be adopted to improve the filtration efficiency:
Optimize the use of flocculants
Proper flocculation of the concentrate prior to filtration facilitates the aggregation of ultrafine particles, resulting in larger particle agglomerates. These clumps are easier to separate during the filtration process, which increases the filtration speed.
According to the specific properties of the concentrate, select the appropriate type and amount of flocculant.
Improved filter media
Choosing a more appropriate filter media, such as a coarser or more porous filter cloth, can help increase the filtration rate.
Replace or wash the filter media regularly to avoid clogged pores with ultrafine particles.
Adjust the filtering operation parameters
Adjust the vacuum pressure: Increasing the vacuum level can speed up the filtration rate, but be careful not to get too high to avoid damaging the filter media.
Control feed rate and concentration: Make sure the feed rate and concentration are appropriate to avoid clogging the filter due to excessive concentration.
Pre-treatment or pre-compaction
The concentrate is pre-treated, such as heating or addingFilter aids, may help change the properties of the particles and make them easier to filter.
Using pre-compaction technology, ultrafine particles are polymerized in advance by mechanical or chemical methods for easier filtration.
Other separation techniques are employed
In some cases, other types of solid-liquid separation techniques, such as centrifugation, may need to be considered, especially when vacuum filtration is not efficient.
Maintain and inspect filtration equipment
Regularly maintain and inspect the filtration equipment to ensure that all components are functioning properly and to avoid degradation of filtration efficiency due to equipment failure.
Laboratory tests and field trials
Before implementing any changes, lab tests and small-scale field trials are conducted to determine the most effective solution.
Through the implementation of the above-mentioned method, the filtration speed of concentrate containing ultrafine particles on the vacuum filter can be effectively improved, so as to improve the overall treatment efficiency.
Filter aids