Resourceful treatment method for pyrolysis desorption gas

The invention belongs to the technical field of waste heat treatment, and particularly relates to a resourceful treatment method for pyrolysis desorption gas. The resourceful treatment method for the pyrolysis desorption gas comprises the step of combusting the pyrolysis desorption gas. Part or all of the pyrolysis desorption gas is mixed with combustion-supporting air to form combustion-supporting mixed gas, part or all of the combustion-supporting mixed gas is used as combustion-supporting wind for combustion, and part of the pyrolysis desorption gas is directly back-mixed into a secondary combustion chamber and/or a main combustion chamber. On the premise that a heat exchanger is omitted, the heat exchange efficiency of the pyrolysis desorption gas is improved. The generation probability of NOx is relatively small due to the fact that the oxygen content of the combustion-supporting mixed gas is smaller than that of pure air during combustion, so that the effects of energy conservation and emission reductio