The research was carried out in the field of infrared drying of liquid materials. The problems in this area have been studied and a solution in the form of an infrared installation has been proposed. A low-temperature film electric heater has been selected as a heating element, which has a low operating temperature, which helps to preserve useful substances in the final product, as well as reduce the development of pathogenic microflora. The problem of adhesion and burning during drying of liquid materials has been discovered. Several types of substrate made of different materials have been studied. Studies have been conducted to determine the radiation flux. The dependences of the flow density on time for different heater locations are compiled. The most optimal material for the substrate has been identified. An automatic control system for the drying plant has been developed. An infrared drying unit has been developed. Studies have been conducted on the drying of liquid materials at the proposed installation. The analysis of the obtained results is carried out.

Medvedev Andrey V.

1. Popov V. M., Afonkina V. A., Levinsky V. N., Medvedev A. V. A brief analytical review of the problems and prospects of development of the domestic market of dairy starters. Proceedings from Actual issues of agro-engineering sciences in the sphere of technical service of machines and power engineering: theory and practice: Natsional'naya (vserossiiskaya) nauchnaya konferentsiya – National (All-Russian) Scientific Conference. (PP. 238–244), Chelyabinsk, Yuzhno-Ural'skiy gosudarstvennyy agrarnyy universitet, 2022. EDN CYKZVB (in Russ.).
2. El-Sayed H. S., Salama H. H., Edris A. E. Survival of Lactobacillus helveticus CNRZ32 in spray dried functional yogurt powder during processing and storage. Journal of the Saudi Society of Agricultural Sciences, 2020;19;7:461–467. doi: 10.1016/j.jssas.2020.08.003. EDN MKTMNQ.
3. Popov V. M., Epishkov E. N., Afonkina V. A., Krivosheeva E. I., Levinsky V. N. Theoretical justification of film electric heater parameters as a source of infrared radiation in the technology of drying green crops. Proceedings from Mechanization, engineering, technology, innovation and digital technologies in agriculture: IOP Conference Series: Earth and Environmental Science. (PP. 032038), Smolensk, IOP Publishing Ltd., 2021. doi: 10.1088/1755- 1315/723/3/032038. EDN KOXCIT.
4. Popov V., Afonkina V., Levinsky V., Zudin E., Krivosheeva E. Designing the infrared drying machines of cylindrical type with an active reflector. Proceedings from 12th International Scientific Conference on Agricultural Machinery Industry INTERAGROMASH 2019: IOP Conference Series: Earth and Environmental Science. (PP. 012008), Rostov-on-Don, Institute of Physics Publishing, 2019. doi: 10.1088/1755-1315/403/1/012008. EDN UWFNTR.
5. Popov V. M., Afonkina V. A., Popova A. V. Peculiarities of using flexible film electric heaters in the technology of drying milk starter. Proceedings from Current issues of agroengineering and agricultural sciences: theory and practice: Natsional'naya nauchnaya konferentsiya – National Scientific Conference. (PP. 103–109), Chelyabinsk, Yuzhno-Ural'skiy gosudarstvennyy agrarnyy universitet, 2019. EDN SYGWZV (in Russ.).
6. Levinsky V. N. Justification of technology and parameters of infrared drying of highmoisture biological raw materials on the example of tomato. Extended abstract of candidate’s thesis. Chelyabinsk, 2021, 24 p. EDN RJVUWL (in Russ.).
7. Popov V. M., Afonkina V. A., Levinsky V. N., Medvedev A. V. Research of substrate materials for drying liquid materials. Proceedings from Digital Technologies in Agriculture of the Russian Federation and the World Community. (PP. 060008), Stavropol, AIP Publishing, 2022. doi: 10.1063/5.0107701. EDN FDSVLP.
8. Abdizhapparova B., Potapov V., Khanzharov N. Determination of heat transfer mechanisms during vacuum drying of solid-moist and liquid-viscous materials. Eastern-European Journal of Enterprise Technologies, 2022;6;11(120):6–15. doi: 10.15587/1729-4061.2022.268241. EDN TZJAOQ.
9. Popov V. M., Afonkina V. A., Levinsky V. N., Medvedev A. V. Study of the process of infrared drying of lactic starter cultures. Proceedings from Ensuring the technological sovereignty of the agro-industrial complex: approaches, problems, solutions (ETSAIC2023): E3S Web of Conferences: International Scientific and Practical Conference. (PP. 01004), Yekaterinburg, EDP Sciences, 2023. doi: 10.1051/e3sconf/202339501004. EDN QENXPC.
10. Afonkina V. A., Popov V. M., Levinsky V. N., Medvedev A. V. Technical and economical assessment of the tray type installation implementation for dairy starter cultures' drying. Tekhnika i tekhnologii v zhivotnovodstve, 2023;3(51):92–97. doi: 10.22314/27132064- 2023-3-92. EDN IULBIX (in Russ.).