Microwave heating device and its application in chemical reactions

A microwave heating device comprising a microwave irradiation cavity and a material conduit which runs into and out of the microwave irradiation cavity through cavity wall of the microwave irradiation cavity, a waveguide tube for guiding microwave being installed on the cavity wall, characterized in that the microwave heating device further comprises a heat exchange tube which is disposed inside the material conduit and enters and leaves the material conduit from the nozzle or wall of the material conduit.

The device according to claim 24, wherein the device comprises a plurality of the microwave irradiation cavities, through which the material conduit passes sequentially.

A method comprising:

• using a microwave heating device in chemical reactions, wherein the microwave heating device comprises a microwave irradiation cavity and a material conduit which runs into and out of the microwave irradiation cavity through cavity wall of the microwave irradiation cavity, a waveguide tube for guiding microwave being installed on the cavity wall, characterized in that the microwave heating device further comprises a heat exchange tube which is disposed inside the material conduit and enters and leaves the material conduit from the nozzle or wall of the material conduit.