System for substance separation and energy recovery by thermal treatment

A system for substance separation and energy recovery by thermal treatment, comprising:

• a thermal treatment reactor for receiving a substance and conducting thermal treatment of the substance;
• a circulation piping;
• a heat exchanger, wherein the thermally treated substance produces a gaseous substance being transmitted to the heat exchanger through the circulation piping for the gaseous substance to undergo heat exchange with a high-temperature heat source to increase the temperature, the gaseous substance is then fed into the thermal treatment reactor after the temperature is increased, and then is circulated between the heat exchanger and the thermal treatment reactor through the circulation piping, and the thermally treated substance further forms a residual substance;
• a discharge piping disposed with a vacuum pump and/or a throttle valve at one end thereon;
• a latent heat recovering device, wherein the gaseous substance produced by the thermally treated substance is transmitted to the latent heat recovering device through the discharge piping, and the latent heat recovering device condenses the gaseous substance to condensed substance and recovers the latent heat of the gaseous substance, wherein the condensed gaseous substance forms a condensed substance and a non-condensed substance;
• a gasifier, wherein the residual substance and the non-condensed substance are transmitted to the gasifier to produce a syngas;
• and
• a combustion furnace, wherein the syngas is burned in the combustion furnace with introducing combustion air to produce a high-temperature flue gas that provides the heat required by the heat exchanger;
• whereby the pressure inside the circulation piping can be controlled by the operation of the vacuum pump and/or the throttle valve at the end of the discharge piping, wherein the gaseous substance produced by the thermally treated substance is increased inside the circulation piping and the pressure inside the circulation piping is increased accordingly, and the amount of increased gaseous substance is flowed and fed into the latent heat recovering device through the discharge piping.