Automatic carbon black discharging device in waste tire decomposing apparatus

A waste decomposing apparatus comprising:

• a pulverizing unit which pulverizes waste tires into waste tire pieces having a size smaller than the waste tires;
• a thermal decomposing unit which communicates with said pulverizing unit and which receives the waste tire pieces, said thermal decomposing unit decomposes the waste tire pieces into a carbon black mixture and moves the carbon black mixture away from said pulverizing unit;
• a primary feeding unit disposed at a first angle relative to said thermal decomposing unit and communicates with said thermal decomposing unit for receiving the carbon black mixture, said primary feeding unit includes a cooling unit which cools the carbon black mixture while said primary feeding unit moves the carbon black material away from said thermal decomposing unit;
• a separating unit communicates with said primary feeding unit for receiving the carbon black mixture, said separating unit separates the carbon black mixture into carbon black and metal wires, said separating unit feeds the metal wires into a water vessel while said separating unit moves the carbon black away from said primary feeding unit;
• a secondary feeding unit disposed at a second angle relative to said thermal decomposing unit, said first angle is substantially equal to said second angle, said secondary feeding unit communicates with said separating unit for receiving the carbon black, said secondary feeding unit moves the carbon black away from said separating unit;
• a collecting hopper communicates with said secondary feeding unit for receiving the carbon black, said collecting hopper includes a feed tube which has a feed screw disposed axially therein, said feed screw connects operatively to a variable speed motor device, said feed tube is substantially parallel to said thermal decomposing unit and moves said carbon black away from said secondary feeding unit and said collecting hopper;
• a plurality of sensors disposed at first, second, and third positions in said collecting hopper to sense at least one of predetermined maximum, normal, and minimum levels of the carbon black, said sensors generate control signals which drive said motor device at speeds which correspond to the at least one predetermined maximum, normal, and minimum levels of carbon black in said collecting hopper, said sensors and said motor device with said feed screw maintain the carbon black at one of the predetermined levels to substantially reduce air from entering a discharge port of said feed tube, whereby the decomposing efficiency of said thermal decomposing unit is substantially increased.