| 摘要 |
The present invention relates to;A lock hopper (11) provided with air-tight hoppers (A3, B3) arranged side by side with entrance valves (A1, B1) arranged above the air-tight hoppers (A3, B3) and exit valves (A4, B4) arranged below the air-tight hoppers (A3, B3).;The lock hopper (11) performs control which alternately repeats the following states: a state in which granular substances in an upper system are placed in one of the hoppers and gas is supplied into the other hopper to discharge granular substances from the inside of the other hopper to a lower system and a state in which the granular substances in the upper system are placed in the other hopper and gas is supplied to said hopper to discharge granular substances from the inside of said hopper to the lower system.;Also provided is a method of transferring granular substances in an upper system to a lower system by using above-described lock hopper, wherein gas having a volume corresponding to the volume of at least the granular substances to be discharged to the lower system is supplied to a hopper in a state in which the granular substances are being discharged from the hopper to the lower system. |
| 主权项 |
1. A lock hopper comprising
a lock hopper A having a hopper A3 formed air-tightly, a granular substance entrance pipe A2 connected to the top of the hopper A3, an entrance valve A1 interposed in the granular substance entrance pipe A2, a granular substance exit pipe A5 connected to the bottom of the hopper A3, an exit valve A4 interposed in the granular substance exit pipe A5, a gas-introducing pipe A7 connected to the hopper A3 wherein a volume of gas introduced into the hopper A3 through the gas-introducing pipe A7 is 1 to 2 times the volume of the granular substance discharged to a lower system, and a gas-introducing valve A6 interposed in the gas-introducing pipe A7, a lock hopper B having a hopper B3 formed air-tightly, a granular substance entrance pipe B2 connected to the top of the hopper B3, an entrance valve B1 interposed in the granular substance entrance pipe B2, a granular substance exit pipe B5 connected to the bottom of the hopper B3, an exit valve B4 interposed in the granular substance exit pipe B5, a gas-introducing pipe B7 connected to the hopper B3 wherein a volume of gas introduced into the hopper B3 through the gas-introducing pipe B7 is 1 to 2 times the volume of the granular substance discharged to a lower system, a gas-introducing valve B6 interposed in the gas-introducing pipe B7, a metering feeder P by which the granular substance of the upper system is supplied to the granular substance entrance pipe A2 and B2, and a metering feeder Q by which the granular substance in the hopper A3 or B3 is supplied to the lower system, and a control section C controlling the opening and closing of each of the entrance valves A1 and B1, the exit valves A4 and B4, and the gas-introducing valves A6 and B6,in which lock hopper the following state (1) and state (2) are alternated repeatedly by controlling the control section C, whereby the granular substance in the hopper A3 or B3 is transferred downward to the metering feeder Q alternately through the granular substance exit pipe A5 or B5, wherein
when the granular substance is received into the lock hopper A from the upper system, the gas in the hopper A3 flows toward the upper system in exchange for the incoming granular substance and when the granular substance is discharged from the hopper A3, the above defined volume of gas is introduced to the hopper A3 and when the granular substance is received into the lock hopper B from the upper system, the gas in the hopper B3 flows toward the upper system in exchange for the incoming granular substance and when the granular substance is discharged from the hopper B3, the above defined volume of gas is introduced to the hopper B3: a state (1) in which the inlet valve A1 is open, the inlet valve B1 is closed, the exit valve A4 is closed, the exit valve B4 is open, the gas-introducing valve A6 is closed, and the gas-introducing valve B6 is open, and a state (2) in which the inlet valve A1 is dosed, the inlet valve B1 is open, the exit valve A4 is open, the exit valve B4 is closed, the gas-introducing valve A6 is open, and the gas-introducing valve B6 is dosed. |
