A gas infrared burner was first developed in 1933 in Germany for the conversion of gas combustion energy into thermal energy of infrared radiation. The design of the gas infrared burner includes a ceramic perforated radiator panel and auxiliary elements (gas valves) that control the process of gas supply to the burner and subsequent combustion of the gas-air mixture. The work efficiency depends on the appropriate selection of the dimensions of its main structural elements. (Research purpose) The research purpose is in calculating gas infrared burners for disinfection of soil and substrate in protected ground. (Materials and methods) The calculation of gas infrared burners is reduced to determining the dimensions of its main structural elements: nozzle, throat, mixer, reducer, diffuser and nozzle. (Results and discussion) The gas flow rate per burner, the cross-sectional area of the nozzle and its diameter, and the gas flow rate from the nozzle, the area of the radiating surface were determined based on the specified thermal load Qo and the specific load qo of the nozzle. The calculations of the velocity of the gas-air mixture in the holes of the tile fit within the limits of permissible speeds. The article presents the calculation scheme of the gas infrared burner. (Conclusions) The gas infrared burners, the main structural elements, gas consumption and the speed of the gas-air mixture were calculated. The calculations of infrared burners showed that the velocity of the gas-air mixture in the holes of the ceramic tile fits within the permissible values, which will positively affect the efficiency of its operation.

Soil is a favorable environment for many microorganisms, pathogenic bacteria, fungal spores, insect eggs due to the presence of nutrients and moisture in it. Soil treatment from pests and pathogens of agricultural crops for disinfection can be carried out by chemical, energy, thermal, biological methods. The most common method is thermal. This is because many pests and pathogens have a protein structure that is easily destroyed when the temperature increases, and the thermal effect can be obtained from various heat carriers. (Research purpose) The research purpose is in developing an energy-efficient method of soil disinfection using infrared radiation. (Materials and methods) The article shows the relation between the spectral thermoradiation characteristics of soil with characteristics of infrared emitters, namely the amount of applied heat, temperature, conductivity, soil moisture, and exposure time, to justify the rational mode of operation for decontamination of the soil. The article presents a mathematical model for this purpose based on known laws that determine the relationship between the necessary parameters. (Results and discussion) Authors offered a plant for soil disinfection with infrared radiation. It was found that the high energy efficiency of the installation is achieved by a high efficiency of infrared burners and infrared radiation affects directly the object of treatment, the soil. The article presents structural-logical and mathematical models of infrared power supply. (Conclusions) Analysis of the heating kinetics equation showed that the maximum permissible speeds for the process of infrared heating of the soil depend on its thermophysical properties, the maximum permissible temperature, the area and the required depth of warming of the soil. It was found that infrared heating and a device for disinfecting the soil in this way will allow energy-efficient, convenient and fast processing.