Online detection system for pH value of neutralization reaction liquid of alumina catalyst carrier

The utility model discloses an alumina catalyst carrier neutralization reaction liquid pH value on-line detection system, which belongs to the field of alumina catalyst carrier preparation and comprises a neutralization reaction kettle, a water pumping port and a water return port are arranged on the neutralization reaction kettle, an input pipe is mounted in the water pumping port, and a floating ball is mounted at the bottom of the input pipe. The bottom of the input pipe is fixedly connected with the floating ball and is positioned in the reaction liquid; a water pump is mounted at the upper end of the input pipe, the inlet end of the water pump is connected with the input pipe, and an output pipe is mounted at the outlet end of the water pump; a pH detection piece is mounted on the input pipe and is suitable for detecting reaction liquid in the input pipe; a water inlet is formed in the neutralization reaction kettle, a water outlet is formed in the lower end of the neutralization reaction kettle, and flo