recovering plastics via the hydraulic separator multidune: flow analysis and efficiency tests
نویسندگان
چکیده
plastic recycling is the process of recovering scrap or waste plastics and reprocessing thematerial into useful products that sometimes differ completely in form from their original state. an importantissue in plastic recovery and recycling is that plastic waste usually contains a variety of plastics that differ intheir physical and chemical properties. separation of recovered plastics into distinct classes is a fundamentalprerequisite for their use as secondary raw materials. the multidune separator is a hydraulic channel thatpermits solid particle sorting on the basis of differential transport mechanisms. steady flow conditions areestablished within the apparatus. an image analysis technique was employed to reconstruct the trajectories oftracer particles within the fluid and to determine the evolution of the velocity field with time. pollen andplastic particles were used as tracers. unlike plastic particles, pollen is expected to passively follow the fluidflow field. tests on monomaterial and composite samples were conducted while varying the operative conditions,and comparisons were made. the presence of three different recirculation areas occurred regardless of thehydraulic head at the multidune inlet except for the first and last chambers. the lower recirculation zone islarger than the upper recirculation zone because of geometrical constraints. with variation in the hydraulichead, the geometry of the inner structures does not change appreciably. if a plastic particle within the principal transport path interacts with the lower recirculation area and its physical characteristics (density and dimensions) are such that it remains trapped, the separation process is successful. because of its smaller dimensions and the reduced value of its velocity field, the upper recirculation area is relatively ineffective in the separation process.
منابع مشابه
recovering plastics via the hydraulic separator multidune: flow analysis and efficiency tests
plastic recycling is the process of recovering scrap or waste plastics and reprocessing thematerial into useful products that sometimes differ completely in form from their original state. an importantissue in plastic recovery and recycling is that plastic waste usually contains a variety of plastics that differ intheir physical and chemical properties. separation of recovered plastics into dis...
متن کاملFluid-Dynamic Characterization and Efficiency Analysis in Plastic Separation of the Hydraulic Separator Multidune
متن کامل
the analysis of the role of the speech acts theory in translating and dubbing hollywood films
از محوری ترین اثراتی که یک فیلم سینمایی ایجاد می کند دیالوگ هایی است که هنرپیش گان فیلم میگویند. به زعم یک فیلم ساز, یک شیوه متأثر نمودن مخاطب از اثر منظوره نیروی گفتارهای گوینده, مثل نیروی عاطفی, ترس آور, غم انگیز, هیجان انگیز و غیره, است. این مطالعه به بررسی این مسأله مبادرت کرده است که آیا نیروی فراگفتاری هنرپیش گان به مثابه ی اعمال گفتاری در پنج فیلم هالیوودی در نسخه های دوبله شده باز تولید...
15 صفحه اولEfficiency Analysis of Hydraulic Power Steering System
Hydraulic assisted power steering system is a high bandwidth servo with stringent performance requirements on accuracy, reliability, and cost. Design of such a system can be best achieved by using a validated and user friendly computer simulation program. Hydraulic integrated power steering ( HIPS ) program has been developed using basic concepts from science and engineering. HIPS provides a de...
متن کاملthe stady and analysis of rice agroclimatology in lenjan
the west of esfahan province, iran, is one of the most important agricultural areas throughout the country due to the climate variability and life-giving water of zayanderood river. rice is one of the major and economic crops in this area. the most important climatic elements in agricultural activities which should be considered include temperature, relative humidity, precipitation and wind. so...
15 صفحه اولThe future of hydraulic tests
Perhaps because of the existence of a vast amount of literature, many hydrogeologists believe that well hydraulics is no longer at the frontier of our discipline. Well testing is well established both in theory and practice; its techniques have been applied for decades. However, despite more than 100 years of theoretical development, the plight of the field hydrogeologist is still not enviable ...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
international journal of environmental researchناشر: university of tehran
ISSN 1735-6865
دوره 7
شماره 1 2012
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023