A Plasma Ignition and Stable Combustion Device Powered by IGBT Transistor Rectification

Abstract

The invention discloses a plasma ignition and combustion stabilization device for IGBT (insulated gate bipolar transistor) rectification power supply. The plasma ignition and combustion stabilization device for the IGBT rectification power supply comprises a collision type pulverized coal concentration fractional combustion pulverized coal burner and a plasma spray gun, wherein the plasma spray gun generates high-temperature flame at the temperature of about 4000DEG C to ignite pulverized coal in an inner-layer combustion chamber of the pulverized coal burner; heat released from the burning of the pulverized coal in the inner-layer combustion chamber then ignites pulverized coal in an outer-layer combustion chamber to realize the stable combustion of pulverized coal flame; the collision type pulverized coal concentration fractional combustion pulverized coal burner comprises a primary air dust inlet, a straight pipe section, a taper pipe section, an outer nozzle, a collision concentration block, a collision concentration ring, the inner-layer combustion chamber, the outer-layer combustion chamber, an inner-layer combustion chamber disturbance block, an outer-layer combustion chamber rear disturbance block and an outer-layer combustion chamber front disturbance block; and the plasma spray gun comprises a cathode, a magnetic field coil, a spiral air chamber, an anode, a nozzle and a gun body. The plasma ignition and combustion stabilization device for the IGBT rectification power supply is applied to the starting ignition and the combustion stabilization stage of a pulverized coal fired boiler to replace the traditional big oil gun ignition and combustion stabilization mode, coal is used for replacing oil, and therefore the purpose of saving cost is achieved.

Description

technical field [0001] The invention relates to a plasma ignition and stable combustion device for IGBT transistor rectification and power supply, which is mainly used in the cold state or hot state start ignition and low load stable combustion stage of pulverized coal boilers and in cement, ceramics and metallurgy, etc. The main energy industry can ignite pulverized coal of various coal types such as lignite, bituminous coal, lean coal, anthracite and mixed coal, and belongs to the field of thermal power technology. Background technique [0002] With the continuous increase of international and domestic fuel prices and the continuous expansion of electric power and heating units, the oil consumption of various pulverized coal boilers in the electric power, petrochemical and other industries has increased significantly for cold or hot start-up ignition and low-load stable combustion. At the same time, with the increase of oil consumption in various industries such as transpo...

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Problems solved by technology

[0004] The technical problem of the utility model is: to overcome the deficiencies of the prior art, to provide a plasma ignition and stable combustion device for rectification and power supply of the IGBT transistor, and to adopt a multi-stage concentrated and graded combustion pulverized coal burner and a parallel-flow arc plasma spray gun , fundamentally solve the problems of frequent unsuccessful ignition and unstable combustion of traditional technology

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