Pipeline structure of heating furnace

The utility model provides a pipeline structure of a heating furnace. The pipeline structure comprises a rack, an adsorption device and a filtering device, the adsorption device is arranged on the rack, liquid for adsorbing dust is stored in the adsorption device, and the adsorption device is communicated with the furnace body; the filtering device comprises a filtering assembly and a dust removal bin installed on the rack, a dust removal cavity is formed in the dust removal bin, a dust discharging opening and a dust passing opening communicated with the adsorption device are formed in the dust removal bin, the dust discharging opening and the dust passing opening are both communicated with the dust removal cavity, and the filtering assembly is located in the dust removal cavity. One end of the filter assembly is communicated with the dust passing opening, the other end of the filter assembly is communicated with the dust discharging opening, the filter assembly comprises a mounting frame and a plurality of f