Method for the treatment of exhaust gas produced by high-temperature waste incinerator with a dual-purpose reactor and the system thereof

A method for treating flue gases generated from waste incinerator by using a dual-purpose reactor, wherein said dual-purpose reactor includes a connected incineration chamber and gas-solid suspension chamber, which includes the following steps:

• (1) Monitoring temperature of flue gases generated from a waste incinerator to keep it at a high temperature, wherein said high temperature is 850˜950° C., if the temperature is higher than the upper limitation of said high temperature, then cooling the flue gases and reducing the temperature to close to the upper limitation of said high temperature;
• (2) Introducing said flue gases into the incineration chamber of said dual-purpose reactor;
• (3) Introducing alkaline materials into said incineration chamber;
• (4) Under the condition of maintaining said high temperature, the gas-powder mixture of said flue gases and alkaline materials are introduced into the gas-solid suspension chamber of said dual-purpose reactor, in which the flue gases and alkaline materials are fully mixed and reacted, acid gases and dioxin precursor are removed;
• (5) Said gas powder mixture is introduced into a high temperature filter, where gases and solids are separated from each other, and gases are drawn into a heat energy recycle and dedusting system and then released into the atmosphere by a separated stack;
• (6) Un-reacted alkaline materials are transferred to the incineration chamber for re-usage or collected in an ashes storage bin.