One of the easiest ways to filter oil out of coolant is by using a belt oil skimmer.
Understanding Oil and Coolant Separation
The key to filtering oil from coolant lies in the difference in specific gravity between the two liquids. Oil is lighter than coolant, and therefore, it tends to float on the surface. This property is what makes using a belt oil skimmer such an effective solution.
Belt Oil Skimmers: A Practical Solution
A belt oil skimmer is a tool designed to take advantage of this specific gravity difference. Here's how it works:
- A belt, usually made of a material that attracts oil, moves through the coolant.
- As the belt moves, it picks up the floating oil from the coolant's surface.
- The belt is then passed through a wiper system, which removes the collected oil.
- The removed oil is collected in a separate container, leaving the coolant relatively oil-free.
Advantages of Using a Belt Oil Skimmer:
- Low Maintenance: Belt oil skimmers require minimal maintenance, making them a convenient option for continuous oil removal.
- Easy to Use: They are designed for ease of operation and can be easily integrated into various systems.
- Effective Removal: They efficiently remove floating oil, helping to keep coolant clean.
Other Methods for Oil Removal
While belt oil skimmers are highly effective, other methods might be considered in different circumstances. These methods can include:
- Coalescers: These devices use a special media to gather small oil droplets and make them larger for easier removal.
- Centrifuges: They use centrifugal force to separate oil and coolant based on their densities.
- Absorbents: Materials that absorb oil are used, which then must be removed and disposed of.
Example Application
Consider a machining workshop where coolant is used extensively. Over time, machine oil can contaminate the coolant. A belt oil skimmer can be easily installed in the coolant tank to continuously remove this oil, helping maintain coolant quality, extend its useful life, and protect equipment.
