Description: Das Projekt "Trocknungs- und Kuehlmaschine fuer Granulit und andere Granulate" wird vom Umweltbundesamt gefördert und von Schlingmeier Quarzsand durchgeführt. Objective: The purpose of this project is to test a new type of drying drum for granulite and other granular materials, which, in conjunction with heat recovery methods and the utilization of waste heat, should achieve an energy saving of about 34 per cent compared with conventional methods. This corresponds to an annual oil saving of about 470 toe. General Information: A patent application has been made for a new type of drying drum for the drying of granulite. Its operational efficiency is to be demonstrated in this demonstration project. The drum consists of an intensive drying zone and a re-evaporation zone. The combustion gases from an oil burner heat the granulite to more than 100 deg. C in the intensive drying zone, whereby approximately 75 per cent of the moisture in the sand evaporates. The sand enters the re-evaporation zone, which is operated at a slight vacuum. This process causes re-evaporation to the necessary residual moisture content, and is supported by hot, dry air from the downstream sand cooling (heat recovery). The combustion gases from the intensive drying zone and the dry air from the re-evaporation zone, including the water vapour fractions, are extracted in the central section of the drum. The purification of these exhaust gases is carried out in the dust separator. The compressed air needed in the combustion and transportation processes (6-8 bar) is produced by compressors. Naturally, dry air is produced as cooling air. This is used as combustion air for the oil burner (heat recovery). In comparison with conventional method, the specific energy demand for granulite drying is planned to be reduced by about one-third by the combination of a drying process with re-evaporation and heat recovery. The necessary new components are integrated into operational plant already in existence in Königslutter. Achievements: Alterations, subsequent work: After trial runs, several elements had to be replaced, altered or re-ordered. The Krupp burner was re-ordered. To start with, we had problems with the burner from the firm of Kleinewefers. After controls, subsequent work and improvements, this burner is now working perfectly. The drive was altered. The gear drive was replaced by a chain drive. The electrical controls were altered. regulation apparatus, automatic parts were altered, improvement, worked on etc. Planned alterations for new plant: a) Mechanical twist filters are no longer permitted as filters; in future, special cloth filters must be fitted. b) The angle of the drying drum must be some degrees higher, making installations easier and the performance higher. c) A sand sluice must be installed at the suction part for the exhaust gases, causing less sand in the exhaust gases. d) The burner should be constructed with a smaller volume and greater performance, producing a smaller surface to the outside and better cooling by the compression air on the outer casing. e) Large-scale planning, new planning, thus less conveying ...
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Öl ? Luftkühlung ? Außenluft ? Abwärmenutzung ? Druckluft ? Granulat ? Schleuse ? Flugtriebwerk ? Wärmerückgewinnung ? Wasserdampf ? Brennstoffverbrauch ? Energieträger ? Entstaubung ? Filter ? Getriebe ? Siel ? Verbrennungsgas ? Verdunstung ? Verfahrenskombination ? Wärmeerzeugung ? Wärmehaushalt ? Feuchtigkeitsmessung ? Sand ? Kühleinrichtung ? Spezifischer Energieeinsatz ? Ölbrenner ? Neuanlage ? Vergleichsanalyse ? Abscheidung ? Abgas ? Energieeinsparung ? Kapselung ? Wirkungsgrad ? Wirtschaftlichkeit ? Korngröße ? Trocknung ? Kühlung ? Abgasreinigung ? Verkehr ? Feuchtigkeit ? Versuchsanlage ? Trockenverfahren ? Anlagenbetrieb ? Brenner ? Rückstand ? Korn ? Verdampfung ? Verdichter ? Brennstoffeinsparung ? Wiederfindungsrate ? Wärmefluss ?
Region: Lower Saxony
Bounding box: 9.16667° .. 9.16667° x 52.83333° .. 52.83333°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1982-12-23 - 1987-06-30
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