摘要:
A process for preparing highly viscous polyhexamethyleneadipamide by postpolycondensing the melt of a polymer having a relative viscosity of 2.5-2.7 (measured in a 1% strength solution in 96% strength sulfuric acid) in a twin-screw extruder having degassing zones and closely meshing screws which turn in the same direction. The polymer melt is polycondensed in the extruder by treatment in a plurality of serially arranged zones of alternatingly elevated and reduced pressure, wherein in the zones of elevated pressure, steam superheated to the temperature of the melt is supplied to the melt in an amount of 0.05-0.7 kg/kg of polymer, whereas in the zones of reduced pressure, the input vapor phase and water of condensation are drawn off. The temperature of the melt is raised at a uniform rate over the length of the extruder from 260.degree.-280.degree. C. in the first zone to 280.degree.-310.degree. C. in the last zone.
摘要:
A process for separating low molecular weight compounds from a crude polycaproamide melt comprises heat treating the melt in vacuo with superheated steam, in an extruder having a plurality of degassing zones, under precise conditions of temperature, pressure and configuration, such that the occurrence of side reactions and dehydration of the melt are substantially eliminated, the molecular weight of the polymer during the heat treatment in vacuo, during transport and subsequent processing remains substantially unchanged, a residual content of low molecular weight compounds of .ltoreq.1.8% is achieved, and the operating flexibility of the process is increased.
摘要:
Method and apparatus for fabrication of fuel from form pressed biomass wherein biomass, particularly grass, is dried prior to pressing, for example, into pellets, and use of such fuels, particularly in form of grass pellets, for energy generation.
摘要:
Method and device for producing fuel from molded biomass in which the biomass used is dried biological wastes or fermentation products resulting from wet and/or dry fermentation, and/or silage products, and/or other dry or moist biological wastes.
摘要:
The invention relates to a method and to devices, and to the use of the same, for producing fuel pellets from moist biomass of all kinds, wherein the biomass is comminuted, mechanically dehydrated, dried, and then processed into pellets, wherein the comminution is a fine comminution and/or the biomass is washed before or after the comminution—optionally with the water developing during the mechanical dehydration—and is optionally pre-dehydrated and/or heated before the mechanical dehydration step, and is optionally comminuted again after the mechanical dehydration for easier drying.
摘要:
A motorized conveyor roller is provided which includes a mechanism for rotatably mounting a roller tube in a conveyor frame, the roller tube having a length, an inner diameter and a hollow interior. The roller tube has disposed within the hollow interior, a motor and a gear reducer also mounted inside the roller tube operatively connected to the motor. The gear reducer includes an output and a drive member being driven by the gear reducer output to drive said roller. A lubricant is contained within the hollow interior for lubricating and cooling the motor, the gear reducer, the gear reducer output, and the inner diameter of the roller tube. The roller tube has a device for ensuring that the lubricant is uniformily distributed about the inner diameter and length of the roller tube proximate portions of the inner diameter which do not contain the motor, the gear reducer, or the gear reducer output. The temperature of the lubricant and the roller tube across the length of the roller tube is significantly reduced, and substantially uniform as a result of the conveyor roller design.
摘要:
An apparatus for processing viscous substances or substances which can be made viscous during processing has a casing, in whose bore is arranged a rotatable disk rotor, which comprises a shaft provided with disks. The disks only have a limited clearance relative to the bore wall and define between them a chamber, which has an outlet in front of a damming-back point. In order to provide a self-cleaning construction of the disk rotors and particularly the damming-back points, at least two disk rotors are arranged in axially parallel, partly interpenetrating bores. The disks of one disk rotor project into the chambers of the other disk rotor and the outer circumference thereof is substantially clearance-free with respect to the shaft.
摘要:
The invention relates to a pressurized can comprising a body, a valve arranged in a dome, a base (16), an inner shell (1) with detachable, push-off type cover (8) arranged on the base (16) and a movable shaft (7) arranged in a fixing element (2) and extending through the base (16) into the inner shell (1) and serving as release element for the inner shell with said inner shell (1) being connected to the base (16) via the fixing element (2), moreover comprising a piston element (3) movable in longitudinal direction of the inner shell (1) and being arranged inside the inner shell (1), said element yielding a sealing effect at the inner shell's (1) inner wall and interacting with the shaft (7) in such a manner that when the shaft (7) is moved into the inner shell (1) the piston element (3) causes a liquid present inside the inner shell (1) to be pressurized so that the cover (8) is forced off.
摘要:
Method and apparatus for fabrication of fuel from form pressed biomass wherein biomass, particularly grass, is dried prior to pressing, for example, into pellets, and use of such fuels, particularly in form of grass pellets, for energy generation.
摘要:
A suspension-strut mounting for installation between a shock-absorber strut or spring strut and a vehicle body spring-supported with respect to the axles, with at least one connecting element having elastically resilient and vibration damping properties which is connected both with the body as also with the piston rod of a shock-absorber of the shock-absorber strut or spring-strut; an additional vibration damper is provided in parallel with the connecting element.