Whirlston - Model HM 400 -500kg/h Coconut Shell Pellet Plant

Coconut Shell Crushing
Biomass pellet mill requires the size of raw materials to be less than 5mm, so before further processing, coconut shells should be crushed into standard dimension first. Two types of wood hammer mills are available: electric and diesel. In this line, we choose HM 400 electric wood hammer mill.

Driven by a motor, electric wood hammer mill can be used to process coconut shells as well as other wood or biomass materials. For example, wood chip, wood bark, wood branch, corn stalk and wheat straw etc.

Drying
Size is not the only factor affecting the operation of biomass pellet mill, because raw materials can be so dry or so wet that produced biofuel pellets should be prone to breakage and looseness. No matter which category the materials belong to, their moisture content should be controlled within 12%-18%.

The drying machine used for 500kg/h coconut shell pellet line is airflow wood dryer which consists of heater, feeder, drying tube, cyclone separator and blower. The following information shows its working steps for drying coconut shells:

• Use wood feeder to feed coconut shells into drying tube.
• Use air heater to heat airflow.
• Use blower to deliver the heated airflow into drying tube where it will produce impulse. As a result, the touch area between coconut shells and airflow will be enlarged and the drying speed will be accelerated.
• After enough touch time, the dried coconut shells will be separated by cyclone and discharged for further processing.

Pelletizing
As the soul part of biofuel production line, biomass pellet mill is mainly composed of roller and die which will produce extrusion and friction to coconut shells and change their
shapes. The reshaped coconut shells are then squeezed out through the holes designed on pellet die. According to capacity and appearance, biomass pellet mill is classified into ring
die type and flat die type. Concretely, You can either use one set of MZLH350 ring or one set of WPLM400 flat for the production of 500kg/h coconut shell pellet line

Ring die biomass pellet mill
With large capacity ranging from 0.6t/h to 4t/h, ring die biomass pellet mill has horizontal die and fast production rate. The processing amount changes in virtue of its changeable
rollers.

Flat die biomass pellet mill
Compared with ring die type, the capacity of flat die biomass pellet mill is smaller yet wider, 40kg/h-1800kg/h. It`s suitable for relatively smaller quantities of raw materials. Same as
biomass wood hammer mill, flat die biomass pellet mill can be classified into electric and diesel type according to applied engines. Parameters of biomass pellet mill for 500kg/h coconut shell pellet line