Oil extraction device for pyrolysis of plastics waste material and extraction method thereof

Abstract

An oil extraction system and method for pyrolyzing waste plastic materials are disclosed. The oil extraction system includes: a waste feeding device for supplying waste plastic materials contained in a hopper to a primary pyrolysis chamber through a feed inlet, wherein the primary pyrolysis chamber pyrolyzes the supplied waste plastic materials; a double jacket furnace having a burner and for heating the primary pyrolysis chamber loaded into a burning room of the furnace; a rotation device for rotating the primary pyrolysis chamber loaded into the burning room of the furnace; a secondary pyrolysis chamber for re-pyrolyzing gas produced in the primary pyrolysis chamber, and for separating carbides and residue; a condenser for liquefying the gas separated from the secondary plyrolysis chamber by compression and forming oil; and an oil-water separator for separating oil and water condensed in the condenser.

1 . An oil extraction system for pyrolyzing waste plastic materials comprising:
 a waste feeding device and a carbide collecting device for feeding wastes collected in a hopper and collecting residual carbides respectively;   a primary pyrolysis chamber for pyrolyzing the wastes, being loaded on the top of a carrier moving on rails and being coupled with an outer surface of a gas exhaust tube;   a furnace having a burning room formed for receiving the primary pyrolysis chamber, a burner for heating the primary pyrolysis chamber, and a double jacket body;   a rotation device for rotating the primary pyrolysis chamber located in the burning room of the furnace by connecting the primary pyrolysis chamber to a rotating gas tube; and   a secondary plyrolysis chamber for receiving gas produced by the primary pyrolysis chamber through the rotating gas tube, re-pyrolyzing the gas, separating the gas and carbide particles, and preventing backflow of the gas and carbide particles;   wherein the pyrolyzed gas by the secondary plyrolysis chamber is condensed by a condenser and oil is extracted by a gas separator having an oil-water separation filter.   
   
   
       2 . The oil extraction system of  claim 1 , wherein the waste feeding and carbide collecting device comprises:
 a waste feeding device configured with a hopper having a hydraulic cylinder and a feed inlet at its bottom and installed on the top of a supporting fixture;   a reactor rotating device installed in a middle level of the supporting fixture and having hydraulic cylinders fixed to the supporting fixture by a fixing pin; and   a carbide collecting device located at the bottom of the supporting fixture and having a carbide discharge tube, collector, screen filter, and blower.   
   
   
       3 . The oil extraction system of  claim 1 , wherein the primary pyrolysis chamber comprises:
 rotating rollers installed at two sides of the gas exhaust tube;   a plurality of gas suction pipes for sucking gas, and formed on the surface of the gas exhaust tube and between the rotating rollers;   a cylindrical body containing the plurality of gas suction pipes; and   a slope formed in its inner space.   
   
   
       4 . The oil extraction system of  claim 1 , wherein the furnace comprises:
 a burning room whose inner walls are formed with firebricks;   a burner installed at one side of the burning room;   a double jacket body for containing water;   a water supply pipe and a water drain pipe installed at the upper side and lower side of the double jacket body respectively;   flues installed at the top of the double jacket body and connected to the burning room; and   a door and an auxiliary door formed at the front side and rear side of the furnace.   
   
   
       5 . The oil extraction system of  claim 1 , wherein the rotation device comprises:
 a chain gear installed at the circumferential surface of the rotating gas tube and in the middle between shaft brackets;   the chain gear is driven by a motor via a chain; and   one end of the rotating gas tube is connected to the gas exhaust tube of the primary pyrolysis chamber and the other end of the rotating gas tube is rotatively connected to a connecting tube of the secondary pyrolysis chamber.   
   
   
       6 . The oil extraction system of  claim 1 , wherein the secondary pyrolysis chamber comprises:
 a plurality of porous heating plates;   a connecting tube having a backflow prevention device;   a residue collector and an ash removal valve formed at the bottom of the residue collectors; and   a catalyst stack formed at the upper side of the secondary pyrolysis chamber.   
   
   
       7 . The oil extraction system of  claim 3 , wherein the plurality of gas suction pipes are formed by piercing the circumferential surface of the gas exhaust tube, and an inlet of the gas suction pipes is formed as a slope to maximize a suction rate and is equipped with a metal screen. 
   
   
       8 . The oil extraction system of  claim 3 , wherein a plurality of connecting pins protruding outwards are formed at one side surface of a gas exhaust tube flange of the primary pyrolysis chamber and a plurality of hooking grooves are formed at the other side surface of the gas exhaust tube flange. 
   
   
       9 . The oil extraction system of  claim 5 , wherein the shaft brackets are formed as upper and lower brackets having a pair of bushings to sustain the rotating gas tube and a lubrication inlet is formed at the upper surface of the upper bracket. 
   
   
       10 . The oil extraction system of  claim 5 , wherein the rotating gas tube and connecting tube are connected to each other such that the rotating gas tube may rotate freely and the connecting tube remains in a fixed position, and an O-ring and lubrication packings are formed inside the connection part. 
   
   
       11 . The oil extraction system of  claim 5 , wherein the rotating gas tube comprises:
 a rotating gas tube flange formed at its one end;   a plurality of hooking grooves formed at one side surface of the rotating gas tube flange, to which connecting pins are inserted; and   linkages formed at the upper and lower circumferential positions of the rotating gas tube flange, wherein one end of the linkage is connected to a hinged pin and the other end of the linkage is connected to a hydraulic cylinder and locking hook.   
   
   
       12 . An oil extraction method for pyrolyzing waste plastic materials comprising:
 crushing waste plastic materials containing waste plastics and waste Styrofoam and feeding the crushed waste plastic materials into a hopper;   settling a primary pyrolysis chamber to a reactor rotating device by lifting the primary pyrolysis chamber with a crane and by adjusting the position of the primary pyrolysis chamber with a hydraulic cylinder;   supplying the waste plastic material contained in the hopper into the primary pyrolysis chamber through a feed inlet;   lifting the primary pyrolysis chamber with the crane, loading the primary pyrolysis chamber to a carrier located on rails, transporting the primary pyrolysis chamber into a burning room of a furnace, closing a door, and rotating and heating the primary pyrolysis chamber with a motor and a burner respectively;   transporting gas produced by heating the waste plastic materials in the furnace of the primary pyrolysis chamber to a secondary pyrolysis chamber through gas suction pipes and re-pyrolyzing the gas in the secondary pyrolysis chamber;   condensing the re-pyrolyzed gas in the secondary plyrolysis chamber to produce oil; and   separating water from the oil with an oil-water separator having an oil-water separation filter.