The study of thermal conductivity of asbestos cardboard and fire clay powder to assess the possibility of their application in prefabricated structures of cylindrical housings of pressure vessels

Abstract

Abstract The problem of protecting various elements of process equipment (pressure vessels, reactors, etc.) from critical heating has always been always relevant. The use of thermal insulation materials characterized by low thermal conductivity, high modulus of elasticity and the ability to maintain its aggregate state after a long repeated exposure to pressure and temperature is one of the main ways to address the issue. This work describes the methodology and results of the study of thermal insulation materials (fire clay powder (FCP) and asbestos) and the dependence of their thermal conductivity on the pressure applied to them. The results of the study of thermal insulation materials of different thicknesses demonstrated that a significant effect of reducing the harmful thermal effects on the main load-bearing elements of the process equipment is achieved with a sufficiently small thickness of the embedded layer of the material (up to 10 mm). Likewise, the work describes the progress and results of experimental studies of the combined cylindrical wall with built-in wall heating elements and a layer of thermal insulation material. Coefficients of thermal conductivity of thermal insulation materials (fire clay powder and asbestos) have been determined. The practical possibility of effective protection against overheating of the bearing cylindrical wall of the pressure vessel body has been proved. The use of the thermal insulation layer results in the possibility of increasing the temperature and pressure of the process space of pressure vessels and reactors without changing the size of the bearing part of the wall in comparison with existing similar structures.