Which pump should be chosen in this situation
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Our company needs to extract something from a type of sludge for use as a secondary product. This type of sludge now contains some oils, skin flakes, hair, as well as small amounts of impurities such as sand and pebbles. First, we use a strong acid to partially dissolve the sludge into a suspension; fats and skin debris can be almost completely dissolved, but hair, sand, and small stones cannot be dissolved. These suspensions are then pumped from the sump to a separator for solid-liquid separation. The submersible pumps used in the early stage suffered from rapid corrosion, so later on open-wheel submersible pumps made of 316L material were employed; however, the failure rate of these devices remained very high. (The pH value of the suspension is around 2.) Since the products are made from recycled materials and cost constraints are very strict, it’s not possible to use large-scale equipment, as that would increase costs too much. So I’d like to ask everyone: what material and what type of pump would be better for this situation? Thank you!
It is recommended to use a PTFE pump, with both the pump casing and impeller made of PTFE, offering excellent corrosion resistance. The cost is not high either.
The owner here needs to consider not only corrosion resistance but also wear resistance, as there is sand and gravel inside. The original poster chose a submersible pump, which has a high failure rate – this is an inherent characteristic of submersible pumps: they have a high failure rate. A corrosion- and wear-resistant mortar pump can be chosen instead.
A tetrafluoride pump can be used. It can resist corrosion.
Materials that are resistant to corrosion and wear can be chosen as the material for the pump
It is recommended to use a single-screw pump; it is generally suitable for transporting sludge and similar materials. It can also be used to transport media containing particles and other impurities. Please send the relevant information to my email address
Four-fluoride pumps perform poorly when used for transporting sand and gravel. Our factory used mortar pumps to transport the thick slurry resulting from water treatment processes (due to the poor quality of lime sludge); after 4 months of use, the pump body, pump cover, and impeller became worn out and had to be replaced. The pH value of the medium in question was around 8-11. Only by switching to pumps made of DF2 material was it possible to meet the requirements
A mortar pump is used; this type of pump is made of high-molecular-weight polyethylene, which is a material resistant to corrosion and wear. You can contact me for more details
I have used PTFE pumps, but because the liquid contains sand and small stones, it easily damages the PTFE surface. Once the tetrafluoride coating is damaged, the pump is essentially unusable. I forgot where I read an article about phosphate pumps; it said they are resistant to acids, alkalis, and wear. I wonder if anyone here has any experience with this
Then you can just choose material CD4