System for recycling used tires

Abstract

The present invention discloses a system for recycling used tires. The disclosed system for recycling used tires comprises: a pyrolysis furnace that recycles inputted used tires using a carrier gas and decomposes the used tires through direct heating; and an oil collecting unit that collects oil by cooling and condensing hot steam generated by the pyrolysis furnace. The system also includes a carrier gas circulation line and a carrier gas circulation and supply device. The carrier gas circulation line circulates through the pyrolysis furnace and the oil collecting unit. The carrier gas circulation and supply device is connected to the carrier gas circulation line and comprises a sensing element that measures both the temperature inside the pyrolysis furnace and the pressure inside the carrier gas circulation line. In addition, the carrier gas circulation and supply device collects and stores a non-condensable gas generated by the pyrolysis furnace and selectively supplies the non-condensable gas to the pyrolysis furnace.

1 . A system for recycling waste tires including a pyrolyzing furnace which pyrolyzes the waste tires by a direct heating method using a carrier gas and an oil collecting means which cooling condenses the high temperature steam produced in the pyrolyzing furnace and collects oil, the system comprising:
 a carrier gas circulating line (cl) which passes the pyrolyzing furnace ( 1 ) and an oil collecting means and recycles to the pyrolyzing furnace ( 1 ); and   a carrier gas circulating provider ( 20 ) connected to the carrier gas circulating line (cl), provided with sensors for measuring the temperature in the pyrolyzing furnace ( 1 ) and the pressure in the carrier gas circulating line (cl), collecting and reserving non-condensed gas produced in the pyrolyzing furnace ( 1 ), and selectively providing it to the pyrolyzing furnace ( 1 ) to use it as the carrier gas.   
     
     
         2 . The system according to  claim 1 , wherein the carrier gas circulating provider ( 20 ) includes a pressure measurer ( 21 ) which measures the pressure in the carrier gas circulating line (cl) and a temperature measurer ( 23 ) which measures the temperature in the pyrolyzing furnace ( 1 ), as a sensing element. 
     
     
         3 . The system according to  claim 1 , wherein the carrier gas circulating provider ( 20 ) includes a non-condensed gas reserving tank ( 27 ) connected to the condensed gas circulating line (cl) and selectively reserving the non-condensed gas, and control valves ( 25 ,  29 ) connected to a pipe which connects the non-condensed gas reserving tank ( 27 ) to the condensed gas circulating line (cl) and they selectively provide the non-condensed gas to the non-condensed gas reserving tank ( 27 ) or provide the non-condensed gas in the non-condensed gas reserving tank ( 27 ) to the condensed gas circulating line (cl). 
     
     
         4 . The system according to  claim 1 , wherein the carrier gas circulating provider ( 20 ) provides the non-condensed gas flowing in the condensed gas circulating line (cl) in the non-condensed gas reserving tank ( 27 ) when the pressure in the condensed gas circulating line (cl) is over 100 mmAq and the temperature in the pyrolyzing furnace ( 1 ) is over 200° C. 
     
     
         5 . The system according to  claim 1 , wherein the condensed gas circulating line (cl) is installed with an oxygen removing heater ( 30 ) having a heating element which is selectively heated by an electric source to completely burn the oxygen contained in the condensed gas. 
     
     
         6 . The system according to  claim 5 , wherein the oxygen removing heater ( 30 ) is an electric heater having a heating element which can heat over 300° C.