EP 4196250 A1 20230621 - DRYING OF FILTER MODULES AND FILTER HOUSINGS USING A FREQUENCY-GUIDED MICROWAVE PROCESS
Title (en)
DRYING OF FILTER MODULES AND FILTER HOUSINGS USING A FREQUENCY-GUIDED MICROWAVE PROCESS
Title (de)
TROCKNUNG VON FILTERMODULEN UND FILTERGEHÄUSEN MIT EINEM FREQUENZGEFÜHRTEN MIKROWELLENPROZESS
Title (fr)
SÉCHAGE DE MODULES FILTRANTS ET DE BOÎTIERS DE FILTRES PAR PROCESSUS MICRO-ONDES À FRÉQUENCE CONTRÔLÉE
Publication
Application
Priority
- DE 102020121262 A 20200812
- DE 2021100693 W 20210812
Abstract (en)
[origin: WO2022033637A1] The invention relates to a device for drying dialysis filter cartridges, candle filters and other enclosed filter systems, comprising a microwave chamber which is equipped with a filter module. The microwave chamber is characterised in that it separates regions of high and low microwave absorption in a contact-free manner. The regions of high energy absorption generally correspond to the middle region of the filter where the bundle of hollow fibres or the filter material is located. The regions of low absorption correspond to the microwave-sensitive end regions of the filter module. In order to dry the wet filter module, the microwave frequency with the maximum converted power is determined, then microwave energy is introduced at this frequency, and while the filter is drying, the reflected microwave power is continually determined and kept to a minimum by readjusting the microwave frequency. The water is removed from the module at the same time as an air or gas flow. The method requires a solid-state microwave generator with adjustable frequency, but then enables the quick and gentle drying of filter cartridges and other enclosed filter units such as candle filters. In particular, wastage caused by accidentally overheating the temperature-sensitive end regions of the filter housings and filter modules containing the seals and adhesive bonds is avoided.
IPC 8 full level
B01D 67/00 (2006.01); F26B 3/347 (2006.01)
CPC (source: EP US)
B01D 67/0095 (2013.01 - EP); F26B 3/347 (2013.01 - EP US); F26B 9/06 (2013.01 - EP)
Citation (search report)
See references of WO 2022033637A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022033637 A1 20220217; CN 116472433 A 20230721; DE 102021121051 A1 20220217; DE 112021004239 A5 20230810; EP 4196250 A1 20230621; US 2024035747 A1 20240201
DOCDB simple family (application)
DE 2021100693 W 20210812; CN 202180069708 A 20210812; DE 102021121051 A 20210812; DE 112021004239 T 20210812; EP 21770123 A 20210812; US 202118020668 A 20210812