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Oil Skimmer as a Drum Skimmer
Construction Design
In this skimmer, one or more rollers are mounted on a float, partially submerged in the water to reach the floating foreign oil. The rotating rollers move the adhering oil towards the wipers, where it is collected in a catch basin.
The factors that influence oil removal can be summarized as follows:
- The viscosity of the foreign oil (the thicker the oil, the less effective it is)
- The rotation speed of the drums
- The material of the drum
Drum Skimmer in Action Video:
Applications of the Drum Skimmer
Use in Wave Conditions
The drum skimmer can also be used in wave conditions, but the waves should not exceed the diameter of the drum.
Use in Currents
According to various manufacturers, the drum skimmer is not suitable for use in currents.
Required Water Depth
The water depth should be greater than the immersion depth of the drum skimmer, which is generally quite shallow. Therefore, shallow waters are also suitable for the drum skimmer. The size and number of drums depend on the specific application.
The drum skimmer is commonly used in environmental disasters where oil has entered the water. This skimmer model is frequently employed by fire departments to prevent or mitigate environmental damage caused by oil in open water. [Learn more about oil skimmers for the fire department here.]
In drum skimmer applications, time is a critical factor. The goal is to remove as much oil as possible from the environment in the shortest time possible. Therefore, the correct configuration of system components must be considered based on the specific application. The aim is to recover large quantities of oil in a short period.
Capacity
Due to the large surface area of the drums, a significant amount of adhering oil can be brought to the wiper. Generally, the drums can absorb a considerable amount of oil. In some models, the capacity can be increased by linking multiple modules with a single drum. The drums are capable of collecting oils with different viscosities.
The type of oil influences the selection of components such as pumps or drum types for the drum skimmer. Oils are generally divided into four categories:
- Very light oils, such as gasoline or aircraft fuel
- Light oils, such as diesel
- Medium oils, such as crude oil and hydraulic oils
- Heavy oils
Prices
Belt skimmers are available for well under $1000 . Depending on the manufacturer and quality, belt skimmers can even be purchased for under $500. However, caution should be exercised, as such special offers often bring a lot of work with them due to issues arising from low quality.
In smaller tanks, they effectively remove oils, helping to keep coolants clean. This leads to a significantly longer service life and, therefore, sustainable reductions in operating costs. Depending on the intensity of use, the skimmer belt needs to be replaced at shorter or longer intervals, as it will show signs of wear from oil stripping after a while. The prices for a replacement belt vary by manufacturer and should be inquired beforehand. When comparing prices, factors such as warranty period, spare part costs, capacity, and performance should be considered.
The lifespan of a skimmer belt can vary greatly depending on the aggressiveness of the liquid, influenced by temperature and pH value. It is advisable to ask whether the manufacturer offers different belts designed for different operating conditions to minimize the frequency of replacements.
Why Drum Skimmers Are Less Common in Industrial Applications
Due to the high absorption capacity of the drum skimmer, a large amount of water is also collected, which is typically not desirable in industrial applications. In industrial settings, smaller amounts of foreign oil are typically entered continuously and can be separated more slowly and accurately, making other skimmer designs more suitable. In commercial applications, the focus is on collecting foreign oil with as little water (or other liquids like coolant) as possible. In contrast, during oil spill accidents, the rapid removal of oil from bodies of water is the priority, even if a higher percentage of water is removed along with the oil.
Conclusion
The drum skimmer is exclusively designed for use in open waters and is typically used in small, medium, and larger oil spills in open water.
Learn more about the different types of oil skimmers:
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