Microwave-Based Thermal Coupling Chemical Looping Gasification Method Employing Two Sources, and Device for Same

Patent metadata

Field	Value
Publication number	US-2022001351-A1
Application number	US-201716613920-A
Country	US
Kind code	A1
Filing date	Dec 7, 2017
Priority date	May 18, 2017
Publication date	Jan 6, 2022
Grant date	—

Abstract

A microwave-based thermal coupling chemical looping gasification method and device. The device includes: a microwave radiation cavity; a loading recess of a microwave absorbing material; and a quartz pipe reaction cavity between the microwave radiation cavity and the loading recess of a microwave absorbing material. A microwave generator consisting of magnetrons is provided at a central portion of the microwave radiation cavity and below the loading recess. An infrared temperature-measuring probe group is arranged at two ends of the magnetrons. Two ends of the microwave radiation cavity are connected to a first and second three-way valves, in communication with the ambient atmosphere and a protection gas charging device. A protection gas cooling device and a protection gas circulating fan are sequentially connected in series on a pipeline between the valves.

First claim

1 . A microwave-based thermal coupling chemical looping gasification device employing two sources, the device comprising the following components:
a microwave radiation cavity; a loading recess of a microwave absorbing material filled with the microwave absorbing material; a quartz pipe reaction cavity between the microwave radiation cavity and the loading recess of the microwave absorbing material; the quartz pipe reaction cavity is driven to rotate by a motor; a microwave generator consisting of magnetrons is provided at a central portion of the microwave radiation cavity and below the loading recess of the microwave absorbing material at a corresponding location; an infrared temperature-measuring probe group is arranged at two ends of the magnetrons two ends of the microwave radiation cavity are connected to a first three-way valve and a second three-way valve, respectively; the first three-way valve has a port A in communication with the ambient atmosphere; the second three-way valve has a port B in communication with a protection gas charging device for the microwave radiation cavity; the second three-way valve has a port A in communication with a port B of the first three-way valve via a pipeline; a protection gas cooling device and a protection gas circulating fan are sequentially connected in series on the pipeline.

2 . The microwave-based thermal coupling chemical looping gasification device employing two sources according to claim 1 , wherein a microwave suppressor is disposed at each of the two ports of the quartz pipe reaction cavity;
the first three-way valve is turned to the left, such that the microwave radiation cavity is in communication with the ambient atmosphere; the second three-way valve turned to the right, such that the protection gas charging device for the microwave radiation cavity is in communication with the microwave radiation cavity to get the microwave radiation cavity charged; the second three-way valve is turned to the left, and the first three-way valve is turned to the right, such that the microwave radiation cavity, the protection gas circulating fan and the protection gas cooling device form a closed loop.

3 . The microwave-based thermal coupling chemical looping gasification device employing two sources according to claim 2 , wherein a gas pressure and oxygen concentration detector is disposed on the connecting pipeline between the first three-way valve and the microwave radiation cavity.

4 . The microwave-based thermal coupling chemical looping gasification device employing two sources according to claim 3 , wherein the microwave radiation cavity is also provided with a radiation cavity lock.

5 . A microwave-based thermal coupling chemical looping gasification method employing two sources, the method, implemented by using the microwave-based thermal coupling chemical looping gasification device employing two sources according to claim 4 , comprises the following steps:
Step 1: materials are placed in the middle of the quartz pipe reaction cavity, and the left and right ends of the quartz pipe reaction cavity are made in communication with an inert carrier gas and a product collection device, respectively; first the air in the quartz pipe reaction cavity is removed by pre-purging, and then the carrier gas supply is maintained throughout the gasification process until the end of the reaction; Step 2: the first three-way valve turned to the left to make the microwave radiation cavity in communication with the ambient atmosphere, and meanwhile the second three-way valve is turned to the right to make the microwave radiation cavity in communication with the protection gas charging device for the microwave radiation cavity; the microwave radiation cavity is charged, and attention is paid to the oxygen level and the internal protection gas pressure displayed by the gas pressure and oxygen concentration detector when the oxygen concentration is less than 0.1%, the second three-way valve is turned to the left and the first three-way valve is turned to the right, such that the microwave radiation cavity, the gas pressure and oxygen concentration detector, the protection gas circulating fan and the protection gas cooling device form a closed loop; the protection gas circulating fan and the protection gas cooling device are started to circulate the inert gas in the closed loop; it is necessary to maintain a positive pressure of the microwave radiation cavity throughout the reaction process; if the gas pressure and oxygen concentration detector shows that the pressure is less than 1 atm, the protection gas charging device for the microwave radiation cavity is started to supplement the protection gas; Step 3: the motor is started to maintain the quartz pipe reaction cavity in a slow rotation state; then the magnetron is started, with its input power and frequency controlled through a computer; the surface temperature of the materials is monitored by an infrared temperature probe group, and the temperature data are collected and stored by a computer; the temperature in the loading recess of the microwave absorbing material is monitored by a patch thermocouple, and the temperature data are also collected and stored by a computer.

6 . The microwave-based thermal coupling chemical looping gasification method employing two sources according to claim 5 , the method further comprising an end step:
at the end of the reaction, the magnetron is turned off, the positive pressure of the microwave radiation cavity is released, the radiation cavity lock is opened, and the quartz pipe reaction cavity is taken out for cleaning.

Assignees

• Univ South China Tech

Inventors

• Liao Yanfen
• Lin Yan
• Yu Zhaosheng
• Fang Shiwen
• Lin Yousheng
• Fan Yunlong
• Dai Minquan
• Chen Zhijie
• Ma Xiaoqian

Classifications

• H05B6/806

  for laboratory use · CPC title

• B01J7/00

  Apparatus for generating gases (production of inert gas mixtures B01J19/14; for generating specific gases, see the relevant subclasses, e.g. C01B, C10J {; in "air bags" on vehicles B60R21/26; for starter gas F02C7/26; blasting cartridges for producing gas under pressure F42B3/04}) · CPC title

• B01J2219/00029

  Batch processes · CPC title

• B01J2219/00229

  of the reaction system · CPC title

• B01J19/28 Primary

  Moving reactors, e.g. rotary drums (B01J19/08 takes precedence) · CPC title