Magnetic rotating arc plasma generator

Abstract

The invention relates to a magnetic rotating arc plasma generator, and belongs to the technical field of plasma generators. The magnetic rotating arc plasma generator comprises a cathode, a magnetic rotating arc anode, a rotational flow ring and an anode water channel, and is characterized in that the cathode and the magnetic rotating arc anode are arranged in a coaxial manner; the magnetic rotating arc anode comprises an arc starting anode, a transition anode and a main anode, the transition anode comprises a conducting section and an insulating section, and the main anode comprises an electromagnetic coil and a main anode body. The magnetic rotating arc anode is in the shape of a special-shaped circular tube on the whole, one end of the magnetic rotating arc anode is in the shape of a bell mouth, and the middle of the magnetic rotating arc anode is provided with a through hole. The air flow generates a rotational flow through the rotational flow ring, the electromagnetic coil generates an electromagnetic field, the rotational flow and the electromagnetic field compress the arc together and drive the arc to rotate, thereby enabling the root of the arc to rotate with a high speed on the main anode. The magnetic rotating arc plasma generator has the advantages of high arc voltage, low operating current, high electric-thermal conversion efficiency, small electrode ablation amount, small fluctuation range of arc voltage, wide power adjustment range, low operation cost, good disassembly and assembly characteristic, high practicability and the like.

Description

technical field [0001] The invention relates to a plasma generator, in particular to a magnetic swirl arc anode and a magnetic swirl arc plasma generator suitable for pulverized coal boilers. Background technique [0002] Arc plasma is now widely used in arc plasma ignition of pulverized coal boilers, plasma cutting processing, plasma spraying and other fields. At present, plasma generator systems generally have the disadvantage of high construction and operation costs. Reducing the operating current of the plasma generator can not only reduce the cost of the supporting electrical system equipment of the plasma generator, but also greatly improve the life of the electrodes of the plasma generator. [0003] At present, the operating current of plasma generators of 100KW and above is greater than 200A, and some plasma generators can operate as low as 185A. The anode of the transferred arc plasma torch and the plasma torch (CN 101699928B) have an arc current of 200A. With the...

AI Technical Summary

Problems solved by technology

Generally, the coils connected in series in the anode loop have a large volume and poor applicability

For example: Chinese patent: ZL200720145264.3 discloses that the coil is connected in series in the anode circuit in the plasma generator, the volume of the coil is relatively large, and the anode bracket which acts as a magnetic guide plate is used to guide the magnetic field into the arc, which will inevitably lead to plasma The weight and volume of the generator become larger, which is very unfavorable for the application of the plasma generator

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