Waste heat boiler used for waste sulfuric acid cracking regeneration device and flue gas treatment method

The invention discloses a waste heat boiler used for a waste sulfuric acid cracking regeneration device and a flue gas treatment method. The waste heat boiler comprises a front smoke box, a boiler body and a rear smoke box which are in sequential communication, multiple heat exchange pipes are arranged in the boiler body, a center pipe is arranged in the center in the boiler body, an adjusting valve is arranged at an outlet of the center pipe, inlets of the heat exchange pipes and an inlet of the center pipe communicate with the front smoke box, and outlets of the heat exchange pipes and the outlet of the central pipe communicate with the rear smoke box. The waste heat boiler can effectively avoid dew point corrosion of pipelines and equipment, the service life of the boiler is prolonged, construction cost is low, operation is convenient, and the occupied area is saved. 本发明公开了用于废硫酸裂解再生装置的余热锅炉及处理烟气的方法。余热锅炉包括依次连通的前烟箱、锅炉本体和后烟箱，其中，锅炉本体内部设置若干换热管，且锅炉本体的内部中心设置中心管，中心管的出口设置调节阀，换热管的入口和中心管的入口与前烟箱连通，换热管的出口和中心管的出口与后烟箱连通。该