I. Daily Maintenance
1. Pressure and Flow Monitoring
Record the operating pressure of each cyclone daily (normal range: 0.3-0.8 MPa). If the pressure difference exceeds 10%, immediately check for blockage or wear.
Observe the stability of the underflow concentration (the final stage should maintain 21°Bé). A sudden drop in concentration may indicate cyclone tube damage or uneven feed.
2. Blowdown and Flushing
Drain sediment through the blowdown valve every four hours until clear water is discharged to prevent solids accumulation.
Flush the system with clean water before shutting down to prevent starch residue from hardening and clogging the pipes.
II. Regular Deep Maintenance
1. Cyclone Tube Disassembly and Cleaning
Disassemble the cyclone tube assembly monthly and immerse it in 5% alkali solution for 1-2 hours to soften any lumps. Use a nylon brush and a special needle to clean any blockages. Do not use metal tools.
Inspect the overflow and underflow holes of the cyclone tube for wear. If the plug gauge can pass, replace them. 2. Sealing and Lubrication
Replace aging O-rings and apply food-grade silicone grease to ensure a tight seal.
Relubricate moving parts such as bearings quarterly (such as lithium-based grease) to prevent dry friction.
3. Annual Comprehensive Overhaul
Inspect the cyclone cylinder baffles for corrosion and repair or replace deformed parts.
Calibrate the pressure sensor and flowmeter to ensure accurate monitoring data.
4. Special Scenarios
Sudden power outage: Immediately open all drain valves to prevent starch slurry from solidifying and clogging.
High-load operation: Reduce maintenance intervals to once every two weeks, focusing on inspecting the cyclone tubes for wear.
