It is applied to waste heat recovery of high-temperature flue gas from incinerators and boilers. It adopts inorganic thermal superconducting heat transfer technology, especially suitable for the working conditions with fine particles in the flue gas, which can solve the problem of fine particles enrichment on the surface of heat exchange tubes; the waste heat recovery efficiency is high, and the flue gas temperature can be reduced from about 1100 * C to about 200 ° C; the equipment is fully automatic operation. Supporting accessories and interlocking alarm facilities; different types can be designed according to specific requirements.