How to Maintain a Double Roller Press Granulator

The double-roller press granulator is a core piece of equipment for granulation in fertilizer production lines and chemical industries. Its stable operation directly determines production efficiency and product quality. Scientific maintenance can reduce component wear, avoid malfunctions, and extend the equipment's service life, which is crucial for ensuring continuous production. Based on the equipment's operating characteristics, the following summarizes comprehensive and practical maintenance points.

Daily cleaning is fundamental to maintenance and should be carried out throughout the entire production process. After each shutdown, use specialized tools to clean material residue from the roller surface and gaps to prevent material hardening and adhesion, thus preventing uneven granulation in subsequent production. Simultaneously, use compressed air to blow away dust from inside the equipment to prevent dust from entering key components such as bearings and gears, which would exacerbate wear. Regularly wipe the equipment's exterior to keep the machine clean. The magnetic separation device at the feed inlet should be cleaned daily to prevent iron filings and other hard objects from entering and damaging the roller surface.

Lubrication and inspection of key components are indispensable. Bearings, gears, screws, and other transmission components require the use of appropriate lubricating oil or grease as specified in the instruction manual. Rolling bearings should be replenished with grease every 200-300 hours, and the gearbox oil should be changed every 4000 hours. When changing the oil, the gearbox and oil filter should be cleaned. Daily inspections should check the patency of the lubrication lines, strictly preventing blockages or leaks.  Simultaneously, tighten fasteners in all parts and check for damaged seals to prevent material leakage and equipment displacement.

Roller maintenance is crucial for improving granulation quality. Regularly check the roller surface for wear. If grooves, pits, or worn patterns appear, the rollers should be ground and repaired or the roller shells replaced. After repair, the roundness error must meet the standards. Adjust the roller gap appropriately, precisely controlling it according to the required particle size, while ensuring that the double rollers are concentric and parallel to avoid uneven wear. Maintain a uniform feed rate to reduce localized wear on the roller surface and extend the roller shell's service life.

In addition, a standardized maintenance system should be established to record the operating parameters and maintenance status of the double-roller press granulator. Regular comprehensive inspections should be conducted, and worn parts should be replaced promptly. Operators must follow standard operating procedures, avoiding running the equipment empty or overloading it.  When shutting down, they should follow the proper procedures to empty the material, preventing material buildup and blockages. Implementing scientific maintenance measures will increase the equipment's effective operating rate to over 95%, reducing maintenance costs and ensuring stable and efficient production in the long term.

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