7 Ways to Solve a Blockage in a Wood Pelletizer

1: The moisture content of the material is high or low

If the moisture content of the material is too high or too low, the die hole will be blocked, resulting in no material from the sawdust granulator.

The technical staff of the granulator manufacturer recommends: use the dryer to control the moisture between 10% and 15% to meet its granulation requirements.

2: The pressure roller of the sawdust granulator is loose

When the pressure roller of the wood chip granulator is loose, the gap between the pressure roller and the mold will become larger, and the pressure will be reduced, so that the material cannot be discharged smoothly. The material layer between the die rolls is too thick and unevenly distributed, resulting in material blockage.

Suggestion: stop the machine for inspection and adjust the gap between the pinch rollers.

Three: there is a problem with the scraper

The angle and thickness of the large scraper in the press chamber are incorrect.

Recommendation: The distance between the scraper and the ring die should be about 2cm. Replace or reassemble the deflection scraper.

Four: Operators

The technicians of the pellet machine manufacturer suggest that the operator lacks understanding and mastery of the performance and usage of the sawdust pelletizer, resulting in failure of the sawdust pelletizer or blockage of the ring die.

Suggestion: The operator should be familiar with the various skills of the sawdust granulator, so that the granulation equipment is in production state and the pellets of good quality are produced.

Five: Improper die roll gap

If the gap between the ring die and the pressure roller is too large, the material layer between the die rollers is too thick, the distribution is uneven, the pressure roller is unevenly stressed, and it is easy to slip. Once the extrusion force of the die roller to the material is less than the resistance of the inner wall of the die hole to the material, the material cannot be extruded, and the sawdust pelletizer will be stuck.

Suggestion: Pay attention to adjust the die roll gap in time during production. During adjustment, a state of "seemingly dependent but not dependent, like turning but not turning" is formed between the pressing roller and the ring die. In this operation, the experience of the granulation technician and the adjustment of the feel are more important.

Six: ring die compression ratio is too large

Different materials require different compression ratio molds. Excessive compression ratios can cause abrasive clogging in the feed, resulting in sporadic particle shine, or even carbonization and blackening.

The technical staff of the pellet machine manufacturer recommends: replace the compression ratio ring die suitable for the material.

Seven: The ring die roller is seriously worn

The pressure roller is severely worn, the surface has no teeth, and the friction force is insufficient, so the material cannot be fed into the ring die hole; the ring die bell mouth is severely worn, the feeding port is not smooth, the production capacity is reduced, and the Wood Pelletizer is blocked.

Suggestion: Replace worn ring die and pressure roller in time.