Failure rate of diaphragm pumps when handling dilute acids
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The diaphragm pumps used by our company to transfer materials in dilute acids operate in plate-and-frame filters, but their service life is short – they usually break after two or three months. We would appreciate any advice from experts
The main problem is that the diaphragm isn’t durable; if you continue to use the diaphragm pump, there’s nothing much that can be done. For feeding via plate and frame, the poster might consider using a corrosion- and wear-resistant slurry pump, making sure to choose a mechanical seal as well.
What kind of acid is oleic acid, and can a regular rubber diaphragm be used as a substitute? A tetrafluoride diaphragm definitely won’t last even a few months
What kind of pump is a slurry pump, and what is its mechanical principle? What is the power source?
It refers to dilute sulfuric acid and mixed acids, with a concentration of around 50%
It is a horizontal centrifugal pump, with a semi-open impeller
If the diaphragm material is not appropriate, it will affect its service life; one can consult relevant information to find a corrosion-resistant diaphragm and replace it, or replace the pump itself
What is the material temperature? Flow rate, solid content? Is mixed acid dilute sulfuric acid mixed with some other acid?
Are there any relevant pictures? Let’s take one to broaden our horizons
If there are no impurities, a plastic magnetic pump can work fine for several years; even with impurities, a plastic vertical pump can also last for several years
Mixed acid is a mixture of sulfuric acid and nitric acid, with a concentration of around 50%