Multi-stage continuous pyrolysis reactor using molten salt

A multi-stage continuous pyrolysis reactor using molten salt comprising:

• a reactor body (100) having an inlet (110) at one side of the upper part for introducing polymer waste and an outlet (120) on the lower part for discharging slag consisting of ash and undecomposed char;
• a multi-stage pyrolysis furnace (200) disposed horizontally inside the reactor body (100), configured to pyrolyze polymer waste as it moves in a zigzag path;
• a drive sprocket (330) coupled to a drive shaft (310) installed at one end of the molten salt circulation passages opposite the pyrolysis furnace (200);
• a driven sprocket (340) coupled to a driven shaft (320) installed at the other end of the molten salt circulation passages inside the pyrolysis furnace (200);
• a chain (350) connecting the drive sprocket (330) and the driven sprocket (340), moving in an endless loop;
• a plurality of transport members (360) spaced at predetermined intervals along the chain (350), circulating together with the chain to transport polymer waste;
• a molten salt circulation system (400) connected to the exterior of the reactor body (100) for circulating molten salt as a liquid-phase heat transfer medium;
• wherein the pyrolysis furnace (200) comprises:
• a drying section (210) located at the uppermost part, configured to remove moisture from the pores of the polymer waste within a temperature range of 80-150° C.;
• a melting section (220) located below the drying section (210), configured to melt and liquefy the polymer waste within a temperature range of 100-300° C.;
• a decomposition section (230) located below the melting section (220), configured to vaporize and decompose the molten polymer waste within a temperature range of 200-400° C.;
• and
• a carbonization section (240) located below the decomposition section (230), where slag composed of ash and undecomposed char is generated within a temperature range of 300-450° C.;
• wherein the pyrolysis furnace (200) is formed in a rectangular duct shape,
• wherein the transport member (360) is formed in a rectangular plate shape,
• wherein it is structured such that, through the continuous circulation of the transport members (360) together with the chain (350), the polymer waste is scraped and moved, then dropped to the next stage, and thereafter continues to move while performing pyrolysis,
• wherein a series of baffle plates (500) are arranged in a zigzag pattern along the flow direction of the molten salt within the molten salt circulation passages (130) of the reactor body (100);
• and
• wherein the baffle plates (500) are inclined at a predetermined angle relative to the flow direction of the molten salt, and a through passage (510) is formed between and at the ends of the baffle plates (500).