Patent ID: 8353394

Claim:
A continuous constant-rate feeding system for use at high temperature and under high pressure without risks of jam, the continuous constant-rate feeding system including: at least one storage unit including: a tank ( 10 ) for storing material, wherein the tank ( 10 ) includes upper and lower chambers ( 101 , 102 ); an inlet pipe ( 11 ) connected to the upper chamber ( 101 ); an upper ball valve ( 12 ) connected to the inlet pipe ( 11 ); an outlet pipe ( 13 ) connected to the lower chamber ( 102 ); a lower ball valve ( 14 ) connected to the outlet pipe ( 13 ); and an agitator ( 104 ) rotationally located in the upper chamber ( 101 ) for agitating and preventing the material from sticking to the tank ( 10 ); a scratching unit ( 20 ) including: an upper scratcher ( 21 ) located in the upper chamber ( 101 ) and formed with blades ( 210 ) each formed with a bent guiding section ( 211 ), wherein the upper scratcher ( 21 ) can spin to convey the material from the upper chamber ( 101 ) into the lower chamber ( 102 ); a cap ( 24 ) connected to the blades ( 210 ) of the upper scratcher ( 21 ); a lower scratcher ( 22 ) located in the lower chamber ( 102 ) and formed with blades ( 220 ), wherein the lower scratcher ( 22 ) can spin to convey the material from the lower chamber ( 102 ) into the outlet pipe ( 13 ); an internal material-limiting element ( 27 ) located on and connected to the blades ( 220 ) of the lower scratcher ( 22 ); a material divider ( 23 ) located between the upper and lower chambers ( 101 , 102 ) and formed with an aperture ( 231 ) defined therein, wherein the material falls from the upper chamber ( 101 ) into the lower chamber ( 102 ) through the aperture ( 231 ) batch by batch as the material divider ( 23 ) spins; and an external material-limiting element ( 26 ) located beneath and connected to the material divider ( 23 ); and a water-cooled screw feeding unit including: a screw feeder ( 30 ) connected to the lower ball valve ( 14 ); a double seal ( 31 ) connected to the screw feeder ( 30 ); a cooling water-recycling joint ( 32 ) connected to the screw feeder ( 30 ) through the double seal ( 31 ); a gear motor ( 33 ) connected to the screw feeder ( 30 ); and at least three sensors ( 35 a , 35 b , 35 c ) for sensing the operation of the screw feeder ( 30 ) and sending a corresponding signal to the gear motor ( 33 ).