Waste heat utilization energy-saving system of hazardous waste incineration disposal system

The utility model provides a waste heat utilization energy-saving system of a hazardous waste incineration disposal system, which comprises a waste heat boiler, a waste heat boiler water inlet pipe and a waste heat boiler steam exhaust pipe are arranged on the waste heat boiler, and the waste heat boiler water inlet pipe supplies water through a boiler water supply system. A steam exhaust pipe of the waste heat boiler is respectively communicated with a main pipe network and a flue gas heat exchanger; the flue gas heat exchanger is provided with a flue gas heat exchanger steam inlet pipe and a flue gas heat exchanger water outlet pipe, and the flue gas heat exchanger water outlet pipe is communicated with the boiler water supply system and the deionized water cooling system. High-temperature flue gas generated after hazardous waste incineration is subjected to heat exchange through the waste heat boiler, one part of steam enters the main pipe network for heating or water supplementing after heat exchange, and