US 11,951,450 B2
Processing system and processing method for blocked microreactor
Liangliang Lin, Wuxi (CN); Ziyi Zhang, Wuxi (CN); and Lichen Rui, Wuxi (CN)
Assigned to JIANGNAN UNIVERSITY, Wuxi (CN)
Filed by Jiangnan University, Wuxi (CN)
Filed on Oct. 31, 2022, as Appl. No. 17/977,518.
Claims priority of application No. 202111299119.X (CN), filed on Nov. 4, 2021.
Prior Publication US 2023/0134983 A1, May 4, 2023
Int. Cl. B08B 3/04 (2006.01); B01J 19/00 (2006.01); B08B 7/00 (2006.01); B08B 13/00 (2006.01); H05H 1/24 (2006.01)
CPC B01J 19/0093 (2013.01) [B08B 3/04 (2013.01); B08B 7/0035 (2013.01); B08B 13/00 (2013.01); H05H 1/2406 (2013.01); B01J 2219/0093 (2013.01); B01J 2219/0099 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method for processing a blocked microreactor by using a processing system, wherein the processing system comprises a gas intake device, a flushing device, a microreactor to be processed and a plasma processing device,
one end of the microreactor to be processed is connected with the gas intake device and the flushing device through a pipeline;
an other end of the microreactor to be processed is connected with a waste liquid bottle through the pipeline;
the microreactor to be processed is arranged between electrodes of the plasma processing device;
a four-way valve is arranged between the microreactor to be processed and the gas intake device; and three valves of the four-way valve are respectively connected with an air cylinder, an oxygen cylinder and an argon cylinder;
the gas intake device is also provided with a mass flow control meter for regulating a gas flow; and an opening of the mass flow control meter is 20-50 sccm;
the plasma processing device comprises the electrodes, an AC power supply and an oscilloscope, wherein a first quartz sheet and a second quartz sheet are arranged between the electrodes and the microreactor to be processed;
the electrodes are stainless steel, copper, zinc or iron electrodes, and have shapes of circular, square, triangular or rectangular; and each of the first quartz sheet and the second quartz sheet has an edge larger than edges of the electrodes by 1-2 cm, and a thickness of 1-3 mm;
the processing system also comprises a monitoring device, and the monitoring device comprises a camera and a display;
wherein the flushing device comprises an injection pump and a syringe, the syringe is respectively connected with a fourth valve of the four-way valve and the microreactor is connected to a three-way valve;
wherein the method comprising the following steps:
(1) placing the microreactor to be processed between the electrodes of the plasma processing device, and placing each of the first quartz sheet and the second quartz sheet on an upper side and a lower side of the microreactor to be processed;
(2) opening the four-way valve, and adjusting the opening of the mass flow control meter, so that one or more mixed gases in the air cylinder, the oxygen cylinder and the argon cylinder enter the microreactor;
(3) turning on the AC power supply and adjusting the oscilloscope, wherein an output power applied by the AC power supply is 1.5-5 W;
(4) generating plasma to crack a blockage in the microreactor;
(5) online observing the blockage in the microreactor in real time through the camera connected with the display, and turning off the AC power supply when the blockage is cracked;
(6) starting the injection pump; collecting the cleaning liquid by the waste liquid bottle; closing the four-way valve and stopping the injection pump after the blockage in the pipeline is completely discharged;
wherein the cleaning liquid is water, ethanol or acetone.