Ultrasonic extraction device for plant polyphenols

1 . An ultrasonic extraction device for plant polyphenols, comprising an ultrasonic processor system, wherein the ultrasonic processor system comprises multiple ultrasonic processors, and the ultrasonic processor system is configured for conducting ultrasonic-assisted enzymatic hydrolysis on mixed cellulase solution and plant raw material suspension to extract plant polyphenols;

a reactor flow system, comprising a first reactor flow subsystem, wherein the first reactor flow subsystem comprises a first liquid pump, a second liquid pump, a third liquid pump, and a fourth liquid pump and the first reactor flow subsystem is configured for mixing cellulase solution and plant raw material suspension and conveying mixed cellulase solution and plant raw material suspension into the ultrasonic processor system, and the mixed cellulase solution and plant raw material suspension is capable of circulating in the ultrasonic processor system;

a reactor control system comprises a PID controller, a spectral detector, a temperature sensor, a first gate valve, a second gate valve, a first three-way valve, a second three-way valve, and an electric heating wire, and the reactor control system is configured for detecting temperature in the ultrasonic processor system and concentration of plant polyphenols in the solution after reaction in the ultrasonic processor system, and controlling working conditions of the ultrasonic processor system and the reactor flow system accordingly;

wherein the ultrasonic processor system comprises a plurality of ultrasonic processors serially connected in sequence by pipelines, each ultrasonic processor comprises a feed port and a discharge port communicating with an inner chamber of the ultrasonic processor, respectively; the feed port of each ultrasonic processor is connected to the discharge port of an adjacent ultrasonic processor by a pipeline; the feed port of the ultrasonic processor at an outermost end and the discharge port of the ultrasonic processor at another outermost end are both connected to the reactor flow system; and an ultrasonic transducer is installed on each ultrasonic processor; and

wherein the first reactor flow subsystem comprises a first liquid pump, a second liquid pump, and a third liquid pump; the reactor control system comprises a first gate valve, a second gate valve, a first three-way valve, a second three-way vale, and a PID (Proportional-Integral-Derivative) controller; the first gate valve is arranged on a pipeline communicating with the first liquid pump, the second gate valve is arranged on a pipeline communicating with the second liquid pump, ends of the first gate valve and the second gate valve are both connected to a first valve port of the first three-way valve by pipelines, a second valve port of the first three-way valve is connected to the feed port of the ultrasonic processor at the outermost end, a third valve port of the first three-way valve is connected to a third valve port of the second three-way valve, a second valve port of the second three-way valve is connected to the discharge port of the ultrasonic processor at another outermost end, and a first valve port of the second three-way valve is externally connected with a product storage device; the first liquid pump is configured for conveying the plant raw material suspension, the second liquid pump is configured for conveying the cellulase solution; and the PID controller is configured for controlling on and off of the first liquid pump, the second liquid pump and the third liquid pump, and opening and closing of the first gate valve, the second gate valve, the first three-way valve and the second three-way valve, respectively.

2 . The ultrasonic extraction device for plant polyphenols according to claim 1 , wherein an outer wall of each ultrasonic processor is covered with a thermal insulation jacket; the reactor flow system further comprises a second reactor flow subsystem, and the second reactor flow subsystem is configured for circulating a heated liquid within the thermal insulation jacket.

3 . The ultrasonic extraction device for plant polyphenols according to claim 2 , wherein the second reactor flow subsystem comprises a fourth liquid pump, a liquid inlet and a liquid outlet are formed on each thermal insulation jacket; the liquid inlet of each thermal insulation jacket is connected to the liquid outlet of an adjacent thermal insulation jacket by a pipeline, the liquid inlet of the thermal insulation jacket at an outermost end and the liquid outlet of the thermal insulation jacket at another outermost end are connected to the fourth liquid pump by pipelines, respectively; and an electric heating wire is arranged on a pipeline communicating with the fourth liquid pump.

4 . The ultrasonic extraction device for plant polyphenols according to claim 1 , wherein the reactor control system further comprises a spectral detector; the spectral detector is arranged on a pipeline communicating between the second three-way valve and the discharge port of the ultrasonic processor at the outermost end adjacent to the second three-way valve; and the spectral detector is in signal connection with the PID controller.

5 . The ultrasonic extraction device for plant polyphenols according to claim 3 , wherein the reactor control system further comprises a temperature sensor, the temperature sensor is arranged at a bottom of one of the ultrasonic processors, and the temperature sensor is in signal connection with the reactor control system.

6 . The ultrasonic extraction device for plant polyphenols according to claim 1 , further comprising an ultrasonic preprocessor, wherein the ultrasonic preprocessor is arranged on a pipeline between the second liquid pump and the second gate valve; the ultrasonic preprocessor comprises a micro-flow pipeline, an object stage, an upper fixing block, a piezoelectric ceramic, and a lower fixing block; the second liquid pump communicates with an end of the micro-flow pipeline, the second gate valve communicates with another end of the micro-flow pipeline, the micro-flow pipeline is arrange on the object stage, a bottom of the object stage is arranged on the upper fixing block, the lower fixing block is arranged at a bottom of the upper fixing block, and the piezoelectric ceramic is arranged between the upper fixing block and the lower fixing block.