Alternating-current plasma gun and its fire-lighting device

Abstract

The invention provides an AC plasma gun as well as relevant ignition apparatus. The AC plasma gun comprises a first tubular electrode, a second tubular electrode, an insulating collar and an intake collar; wherein, one end of the first tubular electrode is sealed; the first tubular electrode is connected with a phase line in a power source for the high-frequency arc striking apparatus; outside of the first tubular electrode is provided with a magnetic control coil; the second tubular electrode is linked to the zero line on the power source; the output end of the second tubular electrode is composed of a nozzle; the insulating collar is linked to the first tubular electrode and the second tubular electrode, so that the two electrodes can be insulated against each other; the intake collar is arranged on the first tubular electrode or the second tubular electrode or the insulating collar; the intake collar is composed of an intake hole that is opened in the tangent direction. The ignition apparatus comprises a plurality of plasma guns. The AC plasma gun as well as the relevant ignition apparatus needs no rectification power source, but has the advantages of high power, long life and perfect stability and so on.

Description

technical field [0001] The invention relates to an AC plasma gun which is directly powered by an AC power source and is used for igniting a coal-fired boiler, and an oil-free ignition device formed by the AC plasma gun, belonging to the technical field of electric power. Background technique [0002] Petroleum is the foundation of national economic development and occupies an important strategic position in my country's energy composition. With the rapid development of my country's national economy, the demand for petroleum has increased sharply, making about 40% of my country's petroleum consumption dependent on imports. Petroleum Safety issues have attracted great attention from the state, and saving oil has become one of the key tasks of my country's energy policy. [0003] The electric power industry is a big consumer of oil, and a large part of it is used for the start-up, stop, and low-load stable combustion of thermal power plant units. Therefore, fuel-saving technolog...

AI Technical Summary

Problems solved by technology

DC plasma ignition technology needs to be equipped with a rectifier power supply system, which is expensive and occupies a large area

Moreover, this technology can only ignite bituminous coal with Vdif ≥ 20%, and the applicable coal types are limited

[0006] However, no one has applied the AC plasma ignition system at home and abroad through the direct power supply of AC.

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