Combustible mixed gas heating device for vehicle-mounted microwave reformer

Abstract

The invention provides a combustible mixed gas heating device for a vehicle-mounted microwave reformer. The combustible mixed gas heating device comprises a reaction cavity, a microwave power tube, a microwave plasma reaction tube, a discharge ignition device and a microwave power absorber, wherein the microwave power absorber is arranged in the microwave plasma reaction tube and is prepared from a high-temperature-resistant microwave absorption material; the microwave absorption material absorbs most redundant microwave energy which is not absorbed by combustible mixed gas and converts the microwave energy into heat energy; the heat energy generated by the microwave absorption material is used for heating the combustible mixed gas, so that the combustible mixed gas can be preheated to increase the temperature. The reaction temperature of the combustible mixed gas is increased, so that the heat moving speed and the collision frequency of particles are increased, and the breakdown electric field intensity required for ignition can be reduced; furthermore, a reaction chain is additionally arranged, so that the degree of ionization and the rising speed of the degree of ionization are increased, the reaction rate is increased, and the energy is saved.

Description

technical field [0001] The invention relates to microwave electromagnetic field heating technology, in particular to a combustible gas mixture heating device for a vehicle-mounted microwave reformer. Background technique [0002] Microwave heating is very different from traditional heating methods. Traditional heating methods rely on heat sources to heat the surface of objects through radiation, conduction, convection, etc. gradually rises. Microwave has many advantages such as high efficiency and energy saving, fast heating speed, uniform heating, safety and environmental protection, clean and hygienic, and easy to control. [0003] In the microwave electric field, the microwave power absorbed by the medium is proportional to the frequency, the square of the electric field intensity, the dielectric constant and the dielectric loss tangent. The dielectric loss tangent value represents the ratio of the active loss to the reactive loss of the dielectric material under an alt...

AI Technical Summary

Problems solved by technology

Due to the large difference between gaseous and plasma loads, impedance matching is difficult to solve the problem of reflection of a large amount of residual energy at start-up

The microwave output power of the microwave plasma reformer reaches hundreds of watts. If most of the remaining energy is absorbed through the isolator and or absorbing load, the isolator and or absorbing load of several hundred watts of power will be added, resulting in size, weight, Heat dissipation problem, not conducive to vehicle use

If most of the remaining energy is reflected back to the microwave source, the impact of the reflected energy will not only interfere with the normal operation of the microwave source, but also easily cause its temperature to be too high and its service life to be reduced, and it has the disadvantages of slow temperature rise during startup and low energy utilization.

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