PLANT AND METHOD OF CLEANING INDOOR AIR Russian patent published in 2024 - IPC B01D53/62 

FIELD: various technological processes.

SUBSTANCE: group of inventions relates to air cleaning and maintaining carbon dioxide concentration not exceeding maximum permissible concentration in indoor air. Plant for cleaning air in a room includes an absorber tank equipped at the base with an air blower, and in the upper part, opposite to the base, – by means of the purified air discharge and the absorbent sprayer, between which and base there is a grid for placement of nozzle. Plant also includes a desorber equipped with an electric heater, a bioreactor which is a reservoir designed to accommodate a phytoplankton suspension and equipped with an air supply branch pipe at the base and ultraviolet lamps on the walls of the reservoir. Plant comprises a heat exchanger and an absorbent pipeline connecting the heat exchanger with the absorber sprayer, spent absorbent pipeline connecting absorber base with desorber, carbon dioxide supply pipeline connecting desorber with bioreactor. Bioreactor is equipped with a dome arranged inside, which is made with the possibility of immersing the edges into the phytoplankton suspension. Concentrated carbon dioxide supply pipeline is configured to supply carbon dioxide under the dome. Also disclosed is a method of cleaning air in a room by means of a plant, which includes a) supplying contaminated air by means of an air blower to the base of the absorber, and diethanolamine by means of a sprayer to the upper part of the absorber; b) removing the cleaned air through the upper part of the absorber, and the spent diethanolamine through the base of the absorber by means of a pipeline for regeneration into the desorber; c) heating spent diethanolamine in a desorber to temperature of 65–70 °C, with release of carbon dioxide gas and regenerated diethanolamine; d) removing concentrated carbon dioxide and regenerated diethanolamine from the desorber. Diethanolamine is cooled and fed to step a). Method also includes e) feeding concentrated carbon dioxide under the bioreactor dome for absorption by phytoplankton with further photosynthesis under the effect of UV radiation with release of oxygen, and f) removing oxygen through the upper part of the bioreactor.

EFFECT: group of inventions enables to continuously maintain an optimum air composition in a room without additional airing or ventilation of the room.

4 cl, 1 dwg