摘要:
The invention concerns a device for treating gas with plasma, maintained by microwaves comprising a hollow structure (12) forming a waveguide designed to be connected to a microwave generator, and means (29) for circulating the gas to be treated through said structure in a zone (20) wherein the amplitude of the electric field associated with the incident wave is high. The gas circulating means comprise a plasma torch (30) made of electrically conductive material mounted on a first large surface (33A) of said structure (12) and projecting through an orifice provided in a second large surface (33B) opposite said first large surface. An interstice allowing through the incident waves extends around the injector.
摘要:
A method of bonding two or more components of a free flowing powder composition is described herein. At least a first component, such as for example, a metal effect pigment, and at least a second component, such as for example, an organic material is provided, and one or both components are heated by variable frequency microwave radiation to bond or fuse the components together. Coating compositions and coated articles made by the described method are also provided.
摘要:
An apparatus for microwave heating or a reaction chamber (1) including a resonant microwave cavity (2) in the form of a cylindrical body (3). Microwaves are fed into the cavity using a waveguide (6). An (organic) substance is fed into the cavity via a feed tube (9) passing along the length of the resonant cavity from inlet to outlet. The substance then flows continuously through the cavity to the outlet at a feed rate. The feed conduit is arranged parallel to and offset from a longitudinal node axis of a natural resonant mode pattern of the resonant microwave cavity. The feed conduit offset may be adjusted relative to the axis. A method of processing an organic substance is disclosed that comprises continuously feeding a blend of the organic substance and a catalyst through an elongate resonant cavity to achieve pyrolysis of the organic substance.
摘要:
An energy transfer apparatus includes a microwave cavity for transfer of energy to substances fed through the cavity. Various reaction or heating methods may be implemented using the cavity, including a method of pyrolysis of organic substances, such as polychlorinated organic substances, as a continuous process.
摘要:
A microwave healer and method of heating are provided. The microwave heater includes a non-resonant enclosure and a continuous helical antenna within the non-resonant enclosure. The continuous helical antenna is configured to receive therein a load to be heated by microwaves radiated from the continuous helical antenna.
摘要:
An apparatus (1) for activation of chemical-physical processes comprising a microwave source (40), for example a magnetron or a klystron or a solid state oscillator (FET transistor), operatively connected at one end of a microwave antenna, for example a co-axial antenna (3), at a connector (13). The apparatus, furthermore, comprises a generator of electric current (45) at high frequency connected to an ultrasonic transducer (2) for example by a shielded cable, not shown in the figure. In operative conditions, the antenna (3) and the ultrasonic transducer (2) are arranged substantially at right angles and at direct contact with a reacting mass (15) contained container (10) in order to activate it and then to complete a desired chemical and/or physical process. More in detail, the reacting mass (15) is subject contemporaneously, or alternatively, to an electromagnetic field generated by the antenna (3), diagrammatically indicated (30), and from the ultrasonic field (20) generated by the ultrasonic transducer (2). By arranging the microwave antenna (3) and the ultrasonic transducer (2) in the reacting mass (15) the efficiency of the process is optimized achieving a synergistic effect thanks to the combination of the electromagnetic field and the ultrasonic field.
摘要:
An apparatus (1) for activation of chemical-physical processes comprising a microwave source (40), for example a magnetron or a klystron or a solid state oscillator (FET transistor), operatively connected at one end of a microwave antenna, for example a co-axial antenna (3), at a connector (13). The apparatus, furthermore, comprises a generator of electric current (45) at high frequency connected to an ultrasonic transducer (2) for example by a shielded cable, not shown in the figure. In operative conditions, the antenna (3) and the ultrasonic transducer (2) are arranged substantially at right angles and at direct contact with a reacting mass (15) contained container (10) in order to activate it and then to complete a desired chemical and/or physical process. More in detail, the reacting mass (15) is subject contemporaneously, or alternatively, to an electromagnetic field generated by the antenna (3), diagrammatically indicated (30), and from the ultrasonic field (20) generated by the ultrasonic transducer (2). By arranging the microwave antenna (3) and the ultrasonic transducer (2) in the reacting mass (15) the efficiency of the process is optimized achieving a synergistic effect thanks to the combination of the electromagnetic field and the ultrasonic field.
摘要:
Microwave heating apparatus (1) for chemical-physical processes comprising a microwave source (4), for example a magnetron or a klystron or a solid state oscillator (FET transistor), operatively connected to an end of an antenna (10) at a connector (12) . The antenna (10) is put in a reaction container (3) where it irradiates with microwaves a reacting material (25) . In particular, the antenna (10) can be coated with a sheath (15) that avoids a direct contact with the reacting material (25), or alternatively, can be put into in a housing (7) executed in the container (3). The housing (7), made of a material transparent to microwaves, can cross the reaction container (3) for a part thereof, or for all its width. The arrangement of the antenna (10) in the reacting material (25) provides a quick and effective heating. Furthermore, it is possible to increase considerably the selectivity, the control and the efficiency of a chemical-physical processes to which the heating technique above described is applied. This allows also to provide a considerable energy saving with respect to apparatus of prior art.
摘要:
Microwave heating system comprising a plurality of microwave applicators for heating loads arranged in said applicators, a control means, one microwave generator to generate microwave energy having a controllable frequency and power level, and a microwave switch arranged to connect said microwave generator to each of said applicators. Each microwave applicator is dedicated a heating time slot in a time frame, and that said time frame comprises time slots for applicators to be heated. During microwave heating, microwave energy is applied to the microwave applicators in its respective time slot, in consecutive time frames.