Abstract:
The fuel pellet of the present invention is formed by compression molding, powdered polyurethane that is obtained by crushing urethane foam, with the bulk specific gravity being 0.45 to 0.55, and the residual chlorine concentration being 0.3 wt. percent or less.
Abstract:
PROBLEM TO BE SOLVED: To downsize the whole of a granulator by pressing the crushed pieces into a press-in hole with sufficient press-in force.SOLUTION: There is provided a press-in forming mechanism 18 in which a periphery-forming part 18A pushing out the crushed pieces from a push-out hole 16a of a peripheral die 16, and a bottom forming part 18B pushing out the crushed pieces from a push-out hole 17a of a bottom die 17 at the lower part of a standing casing 11 by compressing the crushed pieces charged from a charging port 14 into the casing 11 using a screw 41 provided on a rotary drive shaft 25 to push in below, are disposed in vertical two stages. A bottom push-out roller 62 which is rotationally driven around a lateral axis in a radial direction and has a plurality of pressure teeth 62a on an outer periphery at the free end of a bottom pivot 61 installed to the rotary drive shaft 25, is provided to the bottom forming part 18B, and a peripheral push-out roller 53 which is rotationally driven around a vertical axis 52 and has a plurality of pressure teeth 53a on an outer periphery at the free end of a peripheral turning arm 51 installed to the rotary drive shaft 25, is provided to the periphery-forming part 18A.
Abstract:
The invention pertains to a pellet mill 2 for forming pelleted material, the pellet mill 2 comprising: A die 4 having a cylindrical inner surface 6 with a plurality of apertures 8 formed therein and extending to the outside of the die 4, the volume bounded by said inner cylindrical surface 6 defining a die chamber 10. At least two cylindrical rollers 12, 14, 16 adapted to travel over said inner cylindrical surface 6 of the die 4 in a rolling motion. Drive means for causing relative rotation of the die 4 and the rollers 12, 14, 16, so that the rollers 12, 14, 16 will travel over the inner cylindrical surface 6 of the die 4, thereby forming wedge-shaped spaces 18, 20, 22 between the rollers 12, 14, 16 and the inner cylindrical surface 6 of the die 4. A feed system, comprising at least two conduits 24, 26, 28, one associated with each of the at least two rollers 12, 14, 16, extending into the die chamber 10, each of the conduits 24, 26, 28 having a side opening 32 for feeding the pelletizable material 30 into the wedge-shaped spaces 18, 20, 22 between the rollers 12, 14, 16 and the inner cylindrical surface 6 of the die 4, the side opening 32 extending axially along the conduit 24, 26, 28 and having an extension that is equal to the length of the rollers 12, 14, 16, wherein at least one of the conduits 24, 26, 28 is configured for feeding the pelletizable material 30 directly to a wedge-shaped space 22, which is at a higher location in the die chamber than said conduit 28.
Abstract:
The invention relates to a pellet press (1), comprising a motor (3) having a motor housing (31) and a rotor (32) arranged rotatably therein, wherein the rotor (32) is designed as a hollow shaft, a pressing mechanism (2) having a pressing mold (21) and pressing rolls (22) arranged in said pressing mold (21), said rolls being fastened to a stationary shaft (4), wherein the stationary shaft (4) is arranged in the rotor (32) designed as a hollow shaft, and further comprising a mold holder (25) operatively connected to the pressing mold (21), wherein the mold holder (25) and the rotor (32) are connected to each other by means of a connecting means such that a transmission of a torque of the rotor (32) to the mold holder (25) is ensured, wherein the connecting means is a shaft-hub connection.
Abstract:
A reliable, energy-efficient pellet extrusion system [100] is described which creates pellets [170] from a biomass material [16]. It employs equipment which pre-processes the biomass material [16]. Biomass material [16] is then provided to a pellet mill [1000]. The biomass [16] material is provided into a drum [1300] of a pellet mill [1000]. The pellet mill [1000] has a plurality of extrusion holes [1200] and at least one roller [1400]. The rollers [1400] have protrusions [1420] sized and shaped to match up with the holes [1200] of the drum [1300]. As the drum [1300] and rollers [1400] turn, protrusions [1420] of roller [1400] meet with holes [1200] of drum [1300] pressing the biomass [16] out of extrusion holes [1200] as pellets [170]. Since the protrusions [1420] only align with holes [1200], the biomass [16] is extruded through the plurality of extrusion holes [1200] without a significant increase in pressure. This design results in less energy expended and lost thereby creating less wear and failure, resulting in a more efficient, more reliable pellet extrusion device.