Discussion Overview
The discussion revolves around the feasibility of using a venturi pump to remove floating oil from a CNC machine coolant tank by passing compressed air through it. Participants explore the implications of this method, including potential mixing of oil and air, and the challenges associated with oil removal from water-soluble cutting oils.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant inquires whether compressed air can be used with a venturi pump to extract oil and expresses concern about controlling the mixing of oil with air at the outlet.
- Another participant expects that the venturi will produce a hydroxide foam or sludge and asks for details about the type of coolant and oil involved.
- A participant clarifies that the coolant is water-soluble cutting oils and describes tramp oil as unwanted hydrocarbon-based substances contaminating the coolant.
- Concerns are raised about the effectiveness of the venturi pump due to its limited lifting height and the potential for unwanted chemical reactions when mixing cutting fluid with oil.
- One participant shares personal experiences with alternative methods for oil removal, such as using paper towels and sawdust, and suggests that a surface skimmer may be necessary.
- Another participant confirms that mixing oil with air in the venturi will likely create a mist and recommends researching mist eliminators for managing this issue.
Areas of Agreement / Disagreement
Participants express differing views on the effectiveness and practicality of using a venturi pump for oil removal, with no consensus reached on the best approach or the necessity of removing tramp oil.
Contextual Notes
Participants discuss the chemical properties of the cutting fluid and tramp oil, including pH levels and density differences, which may affect the proposed method's effectiveness. The limitations of the venturi pump's lifting capacity are also noted.
