Operation method of replaceable glass furnace discharge pipe

The invention discloses an operation method of a replaceable discharge pipe of a glass melting furnace, which comprises the following steps of: accommodating molten glass in a glass melting pool, arranging a first channel for leading out the molten glass at the bottom of the glass melting pool, arranging a first through hole aligned with the first channel in a melting furnace bottom support plate, arranging a cooling channel for cooling at the top of a lower discharge pipe, and emptying the lower discharge pipe, a cooling medium is introduced into the cooling channel, a second power source supplies power to start a lower coil, and a lower discharging pipe is heated; closing the upper coil, keeping introducing a cooling medium into the cooling channel, reducing the power of a second power supply for supplying power to the lower coil, after the molten glass in the discharging channel is solidified and vitrified and the glass stops flowing out, closing the second power supply, and closing the cooling channel whe