[Problem] To carry out magnetic decomposition by effectively utilizing flue gas. [Solution] In the present invention, a lid 122 is opened, waste material is loaded into a hopper 120, and by opening a shutter 124, the waste material drops into a pyrolysis processing chamber 110. Upon opening an opening 112 and blowing hot air thereinto using a hot-air gun 40, the pyrolysis of the waste material is carried out in the pyrolysis processing chamber 110. The flue gas generated by the pyrolysis is sent through an exhaust duct 20 to a filter part 200, and by passing through a shower 210 and inclined-plate filter 220 of the filter part 200, the temperature of the flue gas drops and tar is removed therefrom. Next, the flue gas passes through a blower 230 and passes through a water tank filter 240, and as a result thereof, tar is removed, and then the removal of moisture is carried out using a fabric filter 250. Thereafter, an odor is removed using a zeolite filter 260 and an active carbon filter 270, and then, from an intake duct 30, a magnetic field is imparted to the flue gas by a magnet 32 and the flue gas is sent to the pyrolysis processing chamber 110.
