Process reasoning
Liquid phases of different densities establish an interface within the rotating bowl. The chosen outlet arrangement and operating conditions influence that interface. Feed composition, temperature and surface-active components can change phase separation. A stable emulsion may need a different process step or conditioning study; higher rotational speed is not a universal solution. Solids also have to be conveyed reliably while limiting unwanted liquid carryover.
ILLUSTRATIVE EXAMPLE
Apply the reasoning
For an illustrative oily slurry, the buyer values recovered oil but also limits oil loss in the water stream. Measuring only the oil concentration in the recovered phase misses water carryover, oil in the solids and total oil recovery. Collect and weigh all three streams over the same interval and characterize emulsified material separately where the test method requires it.
What to record
| Item | Basis to document |
|---|---|
| Heavy liquid | Density, viscosity, suspended solids and residual light phase |
| Light liquid | Water carryover, solids carryover and product recovery |
| Solids | Dry-solids content and retained valuable liquid |
| Feed envelope | Phase ratios, temperature, solids load and emulsion stability |
Review checklist
- Confirm whether the two liquids are immiscible under process conditions.
- Provide normal and extreme phase ratios.
- Agree analytical methods for cross-contamination.
- Specify the actual model and liquid discharge arrangement.
Your next decision
Request a three-stream balance and an explanation of the proposed interface control. HUADA LW-family variant names must be checked against the current configuration and quotation; the family name alone is insufficient. If the downstream process needs cleaner liquid than the decanter can economically deliver, assess a polishing separator or filtration step as a separate duty.