Smelting tail gas recycling system for boiler

The smelting tail gas recycling system comprises a primary combustion module, the primary combustion module comprises a fuel boiler and a feeding device, and the feeding device is connected with the fuel boiler through a feeding pipe; the waste heat treatment module is arranged on the downstream of the primary combustion module, the waste heat treatment module is used for collecting and recycling high-temperature flue gas discharged by the primary fuel module, and the waste heat treatment module comprises a waste heat boiler, a steam turbine and a power generator which are connected in sequence; the air inlet end of the waste heat boiler is connected with the smoke exhaust end of the fuel boiler through a pipeline, and the steam turbine is connected with the steam exhaust end of the waste heat boiler through a pipeline. The tail gas exhaust module is connected with a tail gas exhaust port of the waste heat boiler through a pipeline; and the control module is connected with the primary combustion module, the w