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The new type of high-temperature resistant resin-impregnated graphite heat exchanger exhibits excellent performance in applications involving high-temperature and corrosive media, such as those in the chemical, metallurgical, and new energy industries. Its key advantage lies in the ability to significantly enhance the equipment’s temperature resistance and thermal shock tolerance through a modified resin impregnation process. The operating temperature of traditional phenolic resin-impregnated graphite heat exchangers under long-term use is usually not exceeding 180°C, whereas new high-temperature resistant resin impregnation techniques (such as divinylbenzene and polytetrafluoroethylene (PTFE)) significantly raise this limit. For example, the design temperature of divinylbenzene-impregnated graphite can reach 320–500°C, while PTFE-impregnated graphite can withstand temperatures up to 250°C; in an inert atmosphere, certain types can even tolerate extreme temperatures of 800–1200°C. This enables the device to be used reliably in applications such as high-temperature reactors, molten salt heat exchange, and exhaust gas waste heat recovery, where traditional metal heat exchangers are prone to failure. In terms of practical performance, the new resin impregnation improves the thermal stability and mechanical strength of the material, effectively mitigating the inherent brittleness of graphite materials. In terms of heat transfer efficiency, graphite itself has a thermal conductivity of 100–150 W/(m·K); when combined with optimized honeycomb or tube-type structures, the overall heat transfer coefficient can reach 150–300 W/(m²·K), which is much higher than that of some metal-based devices. A case study from a chemical company shows that after adopting new graphite heat exchangers, the system’s energy consumption was reduced by 20%, while the equipment maintenance cycle was extended by more than three times. Furthermore, its excellent corrosion resistance means that it is hardly eroded in highly corrosive environments such as hydrochloric acid, sulfuric acid, and chlor-alkali solutions, which significantly extends its service life and reduces the frequency of shutdowns for maintenance. As a result, its overall operating cost is considerably lower than that of stainless steel or titanium equipment.