Nordson BKG的数据显示™。被称为CrystallCut®，获得专利*的过程避免了在沉淀后冷却宠物的需要，然后将其重新加热以结晶。作为一个结合了水下颗粒，干燥和结晶的集成网络，它旨在精确控制整个过程中材料温度，从而防止结晶不足和非晶材料水平过高引起的生产和质量问题。根据Nordson BKG引用的例子，该系统的能源效率可以节省超过3,000,000欧元的年度能源成本，并为挤出生产线回收宠物瓶片，将近200,000欧元。™based on actual commercial installations (see graph for an example relating to polymerization). “The CrystallCut system provides substantial relief to the cost pressure on PET polymerization and recycling, particularly as prices for PET fall,” said Ralf Simon, managing director of Nordson BKG™。“In addition, because the system utilizes residual thermal energy within the material to crystallize pellets from the inside out, it yields an enhanced crystalline structure that results in lower energy costs for re-melting the material.” In the system, the hot PET granulate produced by the face cutter of the underwater pelletizer is transported rapidly to the pellet dryer in hot water (up to 95 °C) through closed conveying pipes, where pellet cooling and solidifying takes place. This conveying medium and the short distance between die head and dryer are keys to conserving the heat from melt processing. The pellets are at a temperature in the 150 to 160 °C range when they exit the dryer onto a vibrating conveyor. This keeps the pellets in constant motion, generates a uniform distribution of thermal energy, and prevents pellets from sticking together. At the completion of the process, the pellets have a temperature of approximately 180 °C, have achieved up to 40% crystallinity, and may be transferred directly to solid state polycondensation (SSP). In addition to saving energy costs and preventing amorphous PET clumping, the CrystallCut system yields an almost dust-free product and increases bulk density by 8% in comparison with a conventional process.
假设平均能量消耗12美分/千瓦时,Nordson BKG™ estimates that the system yields energy savings of up to 125 kWh or €15/ton of PET in a modern PET polymerization plant. Since such a plant can achieve a production capacity of 600 tons/day, these savings amount to €9,000 daily and €3,200,000 pa. This represents an annual energy saving of more than 26 gigawatt hours, or 26,000 megawatt hours. Another example cited is that of an extrusion line which recycles PET bottle flakes at a rate of 1,500 kg/hr. The savings achievable with the CrystallCut system exceed 180 kWh, or more than 1.4 cents/kg. In a 365/24 operation this equates to €190,000 pa. (* U.S. Patent No. 8,324,339 B2)
Automatik塑料机械的SPHERO®是一个水下造球系统设计ll kinds of thermoplastic materials, characterized by high flexibility and a small footprint. The system produces spherical pellets of superb quality, ideally suited for further processing with throughputs up to 36,000 kg/hr. The system is applicable for compounding, recycling and raw material manufacturing, depending on size and technical features. With a capacity range of a few 100 kg/hr to several t/hr this system is basically applicable for all materials with thermoplastic behavior, such as Polyolefins - LDPE, HDPE, PP, Styrene polymers- PS, SAN, ABS, Acrylic resins-PMMA, PAN, Polyacetals - POM, Polycarbonates, Polyesters- PET, PBT, PEN, Polyamides- PA 6, PA 6.6, PA 11, Thermoplastic elastomers- TPE-S, TPE-O, TPE-E, Polyurethane, Hot melt adhesives. A unique knife head design and optimized flow conditions within the cutting chamber ensure perfectly spherical pellets which are ideally suited for further processing. Through axial movement of the motor shaft, the main drive motor continuously grinds the knife edges during operation, increasing equipment availability and thus reducing costs. A further highlight is the liquid-heated die plate. The design of the die plate as well as the arrangement of heating pipes and valves assures a simple, rapid exchange. Compared with conventional electrically heated die plates the new design produces pellets with consistently narrow size distribution, a feature heretofore not attained. 好处 |
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