Catalytic reactor and ship provided with same

A catalytic reactor comprising:

• a plurality of catalytic cassettes each including
• a catalyst part configured to reduce nitrogen oxide in exhaust gas and
• an outer peripheral part made of a frame covering side surfaces of the catalyst part;
• and
• at least one lattice frame on which the plurality of catalytic cassettes is placed, wherein said at least one lattice frame includes
• a plurality of inflow holes through which exhaust gas flows into the catalyst parts and
• a plurality of frame parts defining the respective plurality of inflow holes,
• the outer peripheral part of each of the catalytic cassettes is positioned so that the outer peripheral part is accommodated in a respective one of the frame parts,
• the catalytic reactor has, in a side surface of the catalytic reactor, an opening through which the plurality of catalytic cassettes is charged into the catalytic reactor,
• said at least one lattice frame is configured to be divisible into an opening-side frame and an opposed-side frame opposed to the opening, and
• the opening-side frame is detachably attached to the opposed-side frame.