Investigation of the influence of surface quality in the manufacture of combined heat exchange elements of technological reactors by gluing

As is known, the problem of durability is directly related to the technological processes of manufacturing reactor elements, including elements in contact with the internal reactor environment - the reaction zone. Based on this, it is important to develop new, as well as modernize old technologies for manufacturing reactor equipment elements in order to improve their technical and operational characteristics. The technology developed by the authors of this manuscript can act as a technology for manufacturing and assembling elements of reactor equipment. This technology consists of several main stages. One of these stages is the process of roughness formation on the contacting surfaces before gluing them. However, it is necessary to understand that different values of roughness indicators lead to a change in the strength characteristics of adhesive joints. In view of this, the purpose of this study is to determine the strength characteristics of the adhesive joint at various Ra values and adhesive temperature. The article presents an analysis of the most popular thermochemical reactors at the present time, as well as an analysis of the main types of malfunctions leading to the failure of reactor equipment. The developed manufacturing technology of the most wear-prone parts of the reactor (heat pipes, shells) is described. A feature of this technology is the possibility of forming a thermal contact surface on the manufactured parts, which acts as an intensifier of heat exchange, increasing the efficiency of the unit. The practice of using high-strength and high-temperature adhesives is analyzed. Studies have been carried out to determine the strength of adhesive compounds under various conditions. Heat-resistant epoxy adhesives of K-800 and CMK-Vt brands were used as adhesive compositions. The influence of the Ra index in the range from 1 to 6 microns and the influence of temperature in the range from 200 to 600°C on the strength of the adhesive seam is shown.