METHOD FOR DRY-FILTERING A FORES-CONTAINING GAS FLOW AND FILTER DEVICE FOR CLEANING A FORES

The invention relates to a method and a filter device for dry-filtering a gas stream carrying foreign matters, in particular in a filter device for cleaning off gases produced in additive manufacturing technology, comprising: introducing a raw material gas stream (44) containing foreign matters into a raw material gas chamber (15) of a filter unit (12), the filter unit (12) has at least one filter surface separating a raw material gas side from a clean gas side; an oxidizing agent is fed into a reaction zone (24) located on the raw material gas side downstream of the filter surface such that foreign matters contained in substances cleared from the filter surface and/or in the raw material gas flow react with the oxidizing agent within the reaction zone (24) to form oxide-containing foreign matters. 本发明涉及用于干式过滤携带异物的气体流的方法和过滤器装置，特别是在用于净化在增材制造技术中产生的废气的过滤器装置中，所述方法包括：将含有异物的原料气体流(44)导入过滤器单元(12)的原料气体腔(15)中，过滤器单元(12)具有将原料气体侧与清洁气体侧分隔开的至少一个过滤器表面；将氧化剂供给到反应区域(24)中，该反应区域位于过滤器表面的下游的原料气体侧上，使得包含从过滤器表面清除的物质中和/或原料气体流中的异物在反应区域(