Pellet mills for animal feeds.

Pellet mills for wood biomass, RDF, SRF

Pelleting presses for agro biomass

PELLET MILLS EFFICIENCY

Optimal pellet mill performance and durability of the die and rolls

Industrial GR series pellet mills are distinguished by high efficiency at the lowest possible operating costs. This is due to the combination of high-performance mechanical solutions and software control of work in the Automatic Pellet Mill Control System. The following technical solutions have a significant impact on the reduction of changeover time, which can be spent on production and increase revenue and profit

Pellet mills GR

Low power consumption

Depending on the model and type of feedstock, the NPT pellet mills use only 8 kWh per ton of feed.

 

This is possible due to the high integration of the mechanical design with the control software and optimization of the pellet mill (AIAC).

8

kWh/T

Low die speed for high mechanical durability

The design of GR1 and GR2 pellet mills has been designed in order to obtain the lowest rotational speeds of the die. The lower rotation speed ensures higher quality of the pellets when processing raw materials that deviate from the optimal values (such as fraction size, moisture, raw material type, composition of the mixture, etc.). This is possible due to the longer time the pellet piece is formed in the die holes. The lower speed increases the flow resistance, increases the temperature of the forming process. This has an impact on the better density of the raw material particles in the die forming holes. Dies with lower revolutions are lighter, which facilitates their assembly and are cheaper to buy

Steam extraction in pellet mills for the production of biofuels

The pellet mills are equipped with a double steam extraction device. Its task is to quickly discharge the steam accumulated during pelleting  process outside the pellet chamber. The first one is installed in the conditioner directly above the discharge to the pelleting chamber. Second on the cover of the pelleting chamber. Both are connected to a gravity system of chimneys made of acid resistant steel. It is possible to install an optional backflow lockout system for the conditioner.

Large working surface of the die

Due to the modern and massive construction of the drive unit, we can use dies with large work surfaces. They guarantee keeping of the assumed efficiency on all types of raw materials. High torque and power (calculated on a dm2 die surface) in combination with the ACOS Active Capacity Optimization System prevents overloading or blocking of the die. This translates into increased efficiency by extending the stable production time.

Die Slow Motion System - DSMS

The DSMS reduces the die replacement time by at least 30%. It enables effortless rotation of the pelleting unit to assemble or disassemble the die. The independent drive with the pneumatic actuator is controlled by an external pilot (rod) of the left-right rotations.

Forced Feedstock Feeding Unit - FFFU

An independent paddle feeder for the pelleting chamber directs its stream onto the scrapers and then under the rollers. It is not allowed to retract the raw material outside the pelleting chamber. In combination with arc-shaped rollers, the efficiency of the press increases. FFFU is especially used for low-mass raw materials such as biomass and plastics. Not used in standard feeds.

Overload clutch and shear pin

  • protects the die from damage to its internal surface or even wear,

  • reacts instantly in the event of a foreign body getting between the roller and the sensor or overloading with a sudden jump of ampere,

  • immediate release of the standing shaft by breaking the shear pin fixed to the clutch,

  • easy centering of the clutch with the press body for the assembly of a new pin,

  • quick and easy access for inspections and adjustment work,

  • the gutter for the broken pin allows its easy removal,

  • parallel electrical disconnection of the pellet mill by breaking the voltage switch

Dies and rollers assembly and adjustment

  • standard manual adjustment of rollers in all models of pellet mills but GRA models,

  • fast and secure locking of the rollers in a fixed position by tightening the fixing and counter-locking screws,

  • rigid front roller assembly mounted on bolts with a lock,

  • rear roller assembly with 2 scrapers,

  • 2 or 3 scrapers mounted on the front roller carrier; full adjustment possible,

  • a powerful reinforcing ring maintains the rigidity of the assembly and prevents mechanical deformation

  • integrated with the body of the press winch or crane for easy, fast and safe exchange of the die and rolls,

About NPT

Our background goes back to the 60s. We design and produce pellet mills and machines for feed mills, biomass pellets factories, biogas plants, pelleting lines for all pelletizable feedstocks. We design turnkey production lines, that include all necessary processes with full automatic control in Industry 4.0 standards. We provide full mechanical assembly, electrical assembly, training, commissioning and after sales support, consumables and spares. All machines are Made in European Union.

Quick Links

Contact us

NPT LLC

E: npt (@) granulatory.com 

M: +48 509 930 307

A: Poland, Znin (K-P)

  • c-facebook