How to deal with oil entering the circulating water?

Use a PP oil barrier (a homemade lightweight plastic strip can also be used) to push the oil on the water surface to one side of the cooling tank; aim the inlet hose of the hand pump at the oil layer and use the crank arm to pump it into a container for centralized treatment. Many companies with high oil consumption have facilities for recycling and reprocessing used oil.

Has oil been introduced into your circulating water cooling tower? It is caused by minor leaks in the heat exchange equipment. I would like to ask all the experienced sailors and experts in water treatment: how should one deal with oil entering the circulating water? There are two situations – either a low amount of oil entering or an excessive amount. Can chemicals be used to address this issue? What kind of chemicals can be used? Just circulate water directly; the oil is on the surface of the water! Still oil scraping? 1. The corrosion and leakage issues in the cooler have indeed occurred as you mentioned; this is mainly due to under-scale corrosion or leakage at the small floating heads, which leads to oil crossover. 2. It happened once on our end, but not in large quantities; there was just a layer of oil on the surface of the cooling tower. A simple treatment of the oil on the top was sufficient to resolve the issue. However, if there is a significant amount of oil, especially if it’s emulsified, it’s necessary to either use chemicals to break down the emulsion or replace the water. Yet such actions are very costly, but they are still necessary to ensure proper cooling performance.

1. Oil separation 2. Water change.

I’ve never seen cases of large-scale oil leakage; usually, minor leaks are detected right away, after which the entire water cooler system is inspected for the source of the leak, and the affected part is removed and repaired. Even a small amount of oil on the water surface can cause cotton yarn to stick to it. It is very dangerous to allow circulating water to enter the oil system; this issue must be addressed promptly as it can easily lead to accidents, especially the mixing of light oils. . .

A small amount – just throw some absorbent cotton on the water’s surface, and it works quite well!

Here, after oil enters, we treat it by changing the water, that is, by letting the water flow out

Our circulating pool has a large capacity and is shared by several branch factories. Once, there was a leak of heat transfer oil in a branch plant; there was a large amount of such oil present. Vacuum extraction was used to remove it, followed by the addition of water to facilitate overflow (with the overflowed fluid being sent to a wastewater treatment plant for processing), and finally, oil-absorbing cotton was used to clean up the remaining oil.

First, locate the leak points and fix them; after that, carry out overflow replacement and oil absorption treatment.

Is there any specified limit for the oil content in circulating water? Is a level of 60 ppm considered normal according to our tests?