Installation and Commissioning of the Single-Cylinder Dryer
Want your single-cylinder dryer to work tirelessly and reliably? Pay attention to these details during installation:
Leveling and Alignment: Use a precision level to ensure the coaxiality between the dryer axis and the drive system is ≤0.1mm; excessive deviation can cause premature bearing failure.
Steam Piping: Use stainless steel corrugated hoses for connections; remember to install steam traps and pressure gauges-think of them as the brakes and steering wheel for the steam system.
Commissioning Tip: Run the unit idle for 2 hours to monitor bearing temperature rise; if it exceeds 65°C, re-check the installation precision.
Three Key Points for Operational Control
Operating a single-cylinder dryer is like baking bread-getting the heat right is crucial:
Temperature Control: Set to 105–115°C for newsprint and 120–130°C for coated paper; keep temperature fluctuations within ±2°C.
Tension Adjustment: Use cylinder pressure to maintain web tension between 150 and 200 N/m; too loose causes wrinkling, while too tight leads to paper breaks.
Speed Matching: The dryer's linear speed should be 3–5% faster than the preceding process stage to create appropriate draw (tension).
Maintenance Tips to Extend Service Life
These maintenance practices can add five years to the dryer's lifespan:
Daily Routine: Open the drain valve immediately after shutdown to prevent condensate from corroding the cylinder body.
Weekly Check: Inspect the fit between the doctor blade and the cylinder surface; adjust if the gap exceeds 0.05mm.
Monthly Task: Apply high-temperature grease to the bearings, filling about one-third of the bearing's internal space.
Annual Inspection: Thoroughly check the cylinder's roundness; if out-of-roundness exceeds 0.3mm, professional grinding is required.
