Flue gas filtering mechanism of waste heat recovery device of natural gas annealing furnace

The utility model discloses a flue gas filtering mechanism of a waste heat recovery device of a natural gas annealing furnace. The flue gas filtering mechanism comprises an end socket, a flue gas filter, supporting legs, a first gas inlet, a lower conical head, a gas refilter, a filter cylinder and a lower cylinder body, gas which does not pass the monitoring reaches the refiltering container, the rotating rod starts to rotate through the operation of the air cylinder so as to drive the rotating shaft to rotate, and the gas which is not filtered is classified to the other end along with the switching valve plate and is sent to the waste gas inlet, so that the gas enters the waste gas input pipe; and returning the flue gas to the flue gas filter for re-filtration. 本实用新型公开了一种天然气退火炉的余热回收装置的烟气过滤机构，包括封头、烟气过滤器、支撑脚、一号进气口、下锥头、气体再过滤器、滤筒和下筒体。本实用新型未通过监测的气体，到达再过滤容器中，通过气缸的运行使转动杆开始转动，从而带动转动轴进行转动，还未过滤完毕的气体随着切换阀片分类到另一端，送至废气入口，从而使气体进入废气输入管中，重新返回烟气过滤器进行再次过滤。