Abstract: Disclosed herein is a microwave heating device. A material conduit runs into and out of a microwave irradiation cavity through a cavity wall of the microwave irradiation cavity. A waveguide tube for guiding microwave is installed on the cavity wall. A heat exchange tube is disposed inside the material conduit and enters and leaves the material conduit from the nozzle or wall of the material conduit. The microwave heating device is used in chemical reactions. The microwave heating device may control the temperature of the material inside the material conduit under continuous irradiation of microwave.

Abstract: A chemical reactor comprises a microwave irradiating apparatus and a chemical reaction apparatus. The microwave irradiating apparatus comprises a microwave generator and a microwave irradiating cavity (3). The chemical reaction apparatus comprises a tank (2) and a device for controlling the flow of the material. At least a part of the tank (2) is located in the microwave irradiating cavity (3). The chemical reactor can be used for chemical reactions of all kinds of liquid materials, especially multiphase reactions, multiphase catalytic reaction, and the chemical reaction with its reactive materials having high viscosity, semi-solid phase, and high fouling tendency. When the chemical reaction apparatus is used for chemical reaction for producing gaseous byproducts, it can increase the conversion rate of reactants and the yield of product.

Abstract: Disclosed herein is 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 present invention also discloses use of the microwave heating device in chemical reactions. The microwave heating device provided by the present invention may control the temperature of the material inside the material conduit under continuous irradiation of microwave.