Filter usage status
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What kind of filters are used in the graywater treatment units at various plants within the Texaco process, and what is their effectiveness? Would it be good to remove those filters? Please share your opinions.
Currently, vacuum filters are widely used; they align with environmental protection principles but are costly, especially the filter cloths for these filters. Of course, filter presses were used in the past, but their performance was poor so they were gradually phased out; generally, a slag collection tank can also be designed to use the crane’s grab for separation.
Our factory used plate and frame filters before, but has now switched to vacuum filtration; the results are good. Using a slag collection tank is also an option. That isn’t environmentally friendly enough.
1. Plate and frame filter presses require high standards in terms of electrical equipment and instruments, have a complex operation process, and incur high maintenance costs; however, they offer good performance with a low moisture content in the filter cake. 2. Vacuum bag filtration is simple to operate and is recommended for use, although the filter cake has a high moisture content. Using a slag collection tank is not only unsustainable from an environmental perspective, but it also represents a waste of water resources. Additionally: we can also send the material coming out from the bottom of the sedimentation tank to the inlet of the grinder.
The poster said that the material coming out from the sedimentation tank could be sent to the inlet of the grinder. Will this affect the slurry concentration, viscosity, and particle size distribution?
Personally, I believe it is unreasonable to send the material coming out of the sedimentation tank to the inlet of the grinder; this not only causes significant wear on the pipes and valves but also reduces the actual carbon content of the coal slurry. Moreover, it sends most of the ash and slag into the gasification furnace, further increasing the burden on the ash treatment system. Currently, vacuum belt filters, as mentioned by the friends above, are widely used in many units; they offer excellent filtering performance, and the filtrate can be reused as water for coal grinding in the mills. Moreover, it is easy to maintain in terms of operational environmental hygiene, and the labor intensity is not high either.