No Debarking, No Chipping
Coconut shells have no bark to strip, so the debarker and chipper a wood line normally starts with have nothing to do here. Shells enter the HM800 hammer crusher directly at 2-3 t/h.
That removes two machines and their floor space from the front of the line.
Year-round coconut harvest keeps raw material flowing - January runs the same way as July.
Processors running two coconut shell pellet plants side by side keep one in reserve through peak boiler season.
The Five Stations: Equipment and Data
| Station | Model | Key data | Function |
|---|---|---|---|
| Crushing | HM800 wood hammer crusher, 45 kW | 2-3 t/h; output below 5mm | Shells ground for pelleting |
| Drying | GX2200 rotary drum dryer, 30 kW main + 55 kW fan | 4-5 t/h; φ2.2m × 20m | Moisture held at 10-17% |
| Pelleting | MZLH420 ring die pellet mills × 4, 90 kW each | 1 t/h each; die 420mm; 150 rpm; pellets 6/8/10mm | Four mills in parallel |
| Cooling | SKLN2.5 counterflow cooler | 5 t/h; ≥6-10 min hold | Pellets to ambient +3-5°C |
| Packing | WDCS-50 bagging | 3-4 bags/min (5-50 kg) | Sealed, sale-ready bags |
Raw materials beyond shells: sawdust, straw, corn stalk and husk, run through the same stations between coconut batches.
Four Mills in Parallel
One mill in service leaves three running - the schedule absorbs a die change instead of the order book failing.
Each MZLH420 carries a VFD screw feeder, custom dies matched to shell abrasiveness, a serpentine spring coupling, and imported bearings and oil seals. Safety pins carry the overload; die material and clearance get confirmed at ordering against a shell sample.
Gear drive on all four mills lifts output about 20% over belt machines.
Service and Spares
Coconut shell is abrasive duty. Die and roller inspection intervals run shorter than wood lines, and replacement follows measurement.
Hammer mill hammers flip on schedule; a torn screen changes grind size the same day.
Cooler ducts and sieve stay clear; blocked airflow holds moisture in the pellets.
Packing scales recalibrate per plan.
Spares stock: dies, rollers, hammers, screens, safety pins, oil seals. Core components carry a one-year warranty and wear parts ship from standing inventory.
Why Coconut Shell Fuel Sells
High calorific value per kilo, and a raw material that costs disposal money on one side of the yard and sells as fuel on the other.
Indonesian, Philippine and Vietnamese processors hold the supply; boiler operators hold the demand.
Straw, corn stalk and husk run through the same line between coconut batches, spreading die wear.
Why 10-17% Moisture and Ambient +3-5°C Cooling
Pelleting needs mash inside a moisture window. Too wet, the die slips. Too dry, binding fails and fines rise. The GX2200 dryer holds it.
After the die, pellets run above 80°C and wet. The SKLN2.5 cooler pulls ambient air through the bed, dropping temperature and moisture to storage levels. Skip this step and pellets sweat in the bag.
Daily Routine
Test shell moisture before the dryer; hold exit at 10-17%.
Die and roller temperature first - rising heat means feed rate or die condition.
HM800 screen and hammers checked per schedule; coconut shell accelerates both.
Four mills staggered on maintenance; three running is the floor.
Bag weights verified each shift against the set point.
Frequently Asked Questions
Q: Why does this coconut shell line skip debarking and chipping?
Shells carry no bark and no fiber layer to strip. The HM800 takes them directly, removing two machines and their floor space from the front of the line.
Q: What moisture does coconut shell need for pelleting?
10-17%, held by the GX2200 rotary drum dryer. Above the window the die slips; below it, binding fails and fines rise.
Q: Why four 1 t/h mills instead of one 4 t/h mill?
Parallel mills keep three quarters of capacity alive during any single-mill stop, and maintenance schedules stagger so the plant never drops to zero.
Q: What does coconut shell abrasiveness change?
Die and roller inspection intervals shorten, and die material gets matched to shell hardness. The wear budget rises slightly; unplanned downtime falls more than that.
Q: Where does the finished pellet go?
Industrial boilers take high calorific biomass pellets as a coal substitute; activated carbon producers buy shell-derived feedstock. Both run year-round.
Q: Which markets does this line serve?
Southeast Asia first - Indonesia, the Philippines, Vietnam - then India and South America, where coconut processing waste is local and boiler fuel demand is steady.
Q: What pellet diameters can it run?
6mm, 8mm and 10mm by die change, matched to the boiler specification.
Q: Why cool to ambient plus 3-5°C?
Pellets leaving the die run above 80°C and wet. Counterflow cooling drops both before bagging; bagged without cooling, they sweat and mold in the container.
Henan Lvlon Machinery - China-based manufacturer of biomass pellet production lines.
Contact Lvlon for model selection, factory wholesale price, distributor terms and container loading plan.
