CLARIFICATION OF VERY LOW CONCENTRATED SUSPENSIONS BY 'BREATHING' CANDLE FILTERS

摘要

Metal working oils are usually clarified and fed back into the process. To clarify such liquids normally precoat filters or simple vacuum belt filters with non-regenerable nonwoven filter media are applied. This causes permanent extra costs of operation. The concept of periodically backflushed expandable filter candles has been proven as a successfull alternative. The filter principle is based on filter candles consisting of an expandable stack of paper rings. The Institute of MVM and the company Transor Filter GmbH have started a joint research project to analyze the complex filtration mechanisms and to optimize this filtration system. Filter experiments, CFD simulations and theoretical considerations should result in a model to calculate the filter process for practical use and to improve the present state of the art.