Integrated waste gas treatment device

The utility model discloses an integrated waste gas treatment device which is characterized in that a waste gas inlet pipe is connected with a cold fluid inlet of a first heat exchanger, a cold fluid outlet of the first heat exchanger is connected with an air inlet of a hot blast stove, and the hot blast stove, a first catalytic bed, a reduction mixing chamber and a second catalytic bed are sequentially connected; the other side of the second catalytic bed is connected with a hot fluid inlet of the first heat exchanger. An exhaust outlet of the hot-blast stove is connected with a hot air channel inlet of the second heat exchanger. Waste gas is subjected to catalytic oxidation reaction and then mixed with a reducing agent for catalytic reduction reaction, efficient denitration treatment is achieved, high-temperature flue gas and low-temperature waste gas are subjected to heat exchange, heat is recycled, meanwhile, the flue gas is cooled and output, the environment-friendly emission standard is met, the occupie