Waste heat recovery and utilization system for waste gas of revolving furnace

The invention relates to a converter exhaust gas heat recycling system, comprises a converter smoke helmet first exhaust-heat boiler, a steam-water separator, a coaming plate and ceiling, a smoke purifying system, a second dust smoke removing box, a smoke purifying system and a steam generator; the smoke outlet of the converter smoke helmet calandria exhaust-heat boiler is connected with a converter waste gas down going pipeline which is connected with a second exhaust-heat boiler system; the second exhaust-heat boiler system consists of a second exhaust-heat boiler, a steam outlet, a smoke outlet, a soft water pipeline, a flowmeter and pipeline valve gate, a steam pressure meter, a fluviograph and safety valve and a suction adjusting multi-leaf valve. The invention collects all the steam from the first dedusting, second dedusting, second recovery and upper coaming plate of the exhaust-heat boiler, recycles the converter waste gas heat as much as possible, reduces the water consumption of OG system, reduces the cement slurry treating capacity in the subsequent processes, achieves the aim of energy saving and emission reducing, and realizes the converter steelmaking with minus energy consumption.