A nanofiltration device for inactivating droplet-transmitted pathogens. The microdroplets are captured by filtering contaminated air on a filter material/paper with the nanofibrillated cellulose and/or nanocellulose surface treatment containing antiseptic metal ions and an adjuvant in the retained residual water. The air is sucked into the openings of the nanofiltration device located at the bottom and passes into the centre of the filter cartridge, in which a germicidal emitter emits radiation in the UV-C range of the electromagnetic wavelength spectrum is mounted. Subsequently, it flows through a filter paper containing salts of antiseptic metals, from the centre of the radiator outwards through a filter paper hermetically inserted into the filter cartridge, folded harmoniously-shaped so that its surface is maximally and entirely irradiated with UV-C radiation. Antiseptic ions diffuse into the contaminated microdroplets which with UV-C radiation deactivate viruses and disinfect bacteria. Subsequently, the droplets dry out, and the deactivated viruses and bacteria are carried away by air, which, with the help of adjuvants, receive the human body and increase the population's immunity.
The object of the invention is a method of production of particle boards and medium- density fibre boards (MDFs) produced by the dry methods. The new technology makes the boards of cold pressing using polyvinyl acetate, urea-formaldehyde and melamine-urea-formaldehyde glues and their mutual combinations. The particle or fibrous mat is pressed at 84°C - 105°C and maximum moisture content of 20% to the required thickness, after which it is cooled down intensively while maintaining the required thickness. After the board stabilisation, cold pressing is finished, and the prepared boards are taken out of the press. The production method reduces the energy consumption required for hot pressing by up to 100% and shortens the pressing time by up to 80%, depending on the cooling intensity of the boards in the press. It is an ecological way of producing boards with up to 100% representation of chips and fibres from waste agglomerated materials. Such boards using polyvinyl acetate adhesives meet the requirements of STN EN for physicomechanical properties and formaldehyde content in prepared boards for a dry environment for general purposes, including furniture.
B27N 3/06 - Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
VÝSKUMNÝ ÚSTAV PAPIERA A CELULÓZY, A.S. (Slovakia)
Inventor
Boháček, Štefan
Sooš, Ľubomír
Tóth, Marcela
Stankovská, Monika
Pažitný, Andrej
Ihnát, Vladimír
Kuňa, Vladimír
Balberčák, Jozef
Schwartz, Jiří
Abstract
The object of the invention is a nanofiltration device for inactivating droplet- transmitted pathogens. The microdroplets are captured by filtering contaminated air on a filter material/paper with the nanoflbrillated cellulose and/or nanocellulose surface treatment containing antiseptic metal ions and an adjuvant in the retained residual water. The air is sucked into the openings of the nanofiltration device located at the bottom passes Into the center of the filter cartridge, in which a germicidal emitter emits radiation In the UV-C range of the electromagnetic wavelength spectrum is mounted. Subsequently, it flows through a filter paper containing salts of antiseptic metals, from the center from the radiator outwards through a filter paper hermetically inserted into the filter cartridge, folded harmoniously so that its surface is maximally and entirely irradiated with UV-C radiation. Antiseptic ions diffuse into the contaminated microdroplets, which with UV-C radiation deactivate viruses and disinfect bacteria. Subsequently, the droplets dry out, and the deactivated viruses and bacteria are carried away by air, which, with the help of adjuvants, receive the human body and increase the population's immunity.
B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 46/24 - Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
F24F 8/15 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
F24F 8/22 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
F24F 8/28 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation specially adapted for combatting or avoiding Legionella bacteria
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