What should be done if the mechanical seal doesn’t allow water to pass through? Seeking advice
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The mechanical seal at our site doesn’t allow water to pass through (in other words, it’s blocked inside and water can’t flow through). How should this situation be handled? There are many such cases; is it closely related to water quality? And what problems might arise from such long-term operation? Heat can’t be carried away – internal leakage in the mechanical seal? ? Is the place where the seal water pipe is connected in the diagram the machine seal, that is, the stationary and rotating rings? What cools the contact surface between the stationary and rotating rings of the mechanical seal? Right? Need advice?
How hard does your water have to be to clog the holes? Do you have a schematic diagram of the seal? If so, take a photo and show it to me
How hard does your water have to be to clog the holes? Do you have a schematic diagram of the seal? If so, take a photo and show it to me
No, technical upgrades are needed. It’s still alkaline, which is quite disappointing. I know that alkalis tend to cause scaling
Even with hard water, why does it get clogged inside the mechanical seal? Is it due to limited space? Failing to change the water for a long time, coupled with internal leakage in the mechanical seal and alkalinity. Is scaling and blockage inevitable? Help analyze it, thanks. foam
1. The machine seal cooling heat exchanger originally used circulating water; the interior of the heat exchanger became completely clogged with scale. Later, desalinated water was used for heat exchange, and the problem was resolved. However, in our case, white oil is used inside the machine seal, and this white oil comes into contact with the circulating water within the heat exchanger. 2. Circulating water is directly injected into the mechanical seal; water is injected from above while the fluid is discharged directly from below to cool the mechanical seal (via the caustic cleaning system circulation pump). There were blockages, but they weren’t severe. Later, the workshop issued management regulations requiring the use of pump switching to clean the mechanical seals.
I think I understand a bit now: the high temperature inside the mechanical seal causes some water to evaporate, leaving behind calcium and magnesium ions; this leads to an alkaline environment and scale formation
1. The first one is internal leakage, right! I’ve also just analyzed that high temperatures inside the mechanical seal cause the circulating water to evaporate, leaving behind calcium and magnesium ions. It’s excellent for demineralized water, but the cost might need to be taken into consideration. The mechanical seal is clogged; water cannot pass through, and heat cannot be dissipated, causing the seal to deform due to high temperatures and resulting in internal leakage.
Continuous flow of water – to maintain calcium and magnesium ions in the water; is part of this used for heat exchange while another part is used to maintain the pH level?
Then use a kettle, hang it there, and change the water at each shift – this should basically solve the problem. That’s exactly how the alkali pump in my unit is constructed: its sealing life is improved, and there are no white spots under the mechanical seal.