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Alternating current plasma-oxygen rich ignition combustor

A technology for igniting burners and burners, which is applied to burners, gas fuel burners, combustion methods, etc., can solve problems such as poor adaptability of coal types, and achieve the effect of prolonging residence time

Active Publication Date: 2020-02-07
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to solve the problem of poor adaptability of coal types in AC plasma ignition technology
Provide an AC plasma-oxygen-enriched ignition burner

Method used

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  • Alternating current plasma-oxygen rich ignition combustor
  • Alternating current plasma-oxygen rich ignition combustor
  • Alternating current plasma-oxygen rich ignition combustor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like Figure 1-5 As shown in the figure, an AC plasma-oxygen-enriched ignition burner in this embodiment includes a burner body 1, a nozzle 2 is provided at the left end of the burner body 1, and a nozzle 2 passes through the right end of the burner body 1. The flange plate is fixedly connected with a pulverized coal elbow 3, and a center tube 6 is arranged inside the burner body 1 at the center axis of the burner body 1, and a The secondary concentration ring 4 and the secondary concentration ring 5 are arranged, and the secondary concentration ring 5 is located at the outlet of the central cylinder 6, and three alternating current plasma generators 7 are arranged on the outer side wall of the central cylinder 6. The included angle of the axes of the generators 7 is 50°, so that the plasma arcs of the three alternating current plasma generators 7 converge at the central axis of the central barrel 6 and form a continuous fire core area with a length of 300 mm. The left...

Embodiment 2

[0030] like Figure 1-4 As shown in the figure, an AC plasma-oxygen-enriched ignition burner in this embodiment includes a burner body 1, a nozzle 2 is provided at the left end of the burner body 1, and a nozzle 2 passes through the right end of the burner body 1. The flange plate is fixedly connected with a pulverized coal elbow 3, and a center tube 6 is arranged inside the burner body 1 at the center axis of the burner body 1, and a The secondary concentration ring 4 and the secondary concentration ring 5 are arranged, and the secondary concentration ring 5 is located at the outlet of the central cylinder 6, and three alternating current plasma generators 7 are arranged on the outer side wall of the central cylinder 6. The included angle of the axes of the generators 7 is 80°, so that the plasma arcs of the three alternating current plasma generators 7 converge at the central axis of the central barrel 6 and form a continuous fire core area with a length of 400 mm. The left...

Embodiment 3

[0033] like Figure 1-4 As shown in the figure, an AC plasma-oxygen-enriched ignition burner in this embodiment includes a burner body 1, a nozzle 2 is provided at the left end of the burner body 1, and a nozzle 2 passes through the right end of the burner body 1. The flange plate is fixedly connected with a pulverized coal elbow 3, and a center tube 6 is arranged inside the burner body 1 at the center axis of the burner body 1, and a The secondary concentration ring 4 and the secondary concentration ring 5 are arranged, and the secondary concentration ring 5 is located at the outlet of the central cylinder 6, and three alternating current plasma generators 7 are arranged on the outer side wall of the central cylinder 6. The included angle of the axes of the generators 7 is 60°, so that the plasma arcs of the three alternating current plasma generators 7 converge at the central axis of the central barrel 6 and form a continuous fire core area with a length of 500 mm. The left...

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Abstract

The invention belongs to the field of coal-fired boilers of thermal power plants, and particularly relates to an alternating current plasma-oxygen rich ignition combustor. The alternating current plasma-oxygen rich ignition combustor aims to solve the problem of poor coal type adaptability of an alternating current plasma ignition technology. The alternating current plasma-oxygen rich ignition combustor comprises a combustor body, a nozzle is arranged at the left end of the combustor body, a pulverized coal elbow is fixedly arranged at the right end of the combustor body, and a central cylinder is arranged at the position, located at the central axis of the combustor body, inside the combustor body. According to the alternating current plasma-oxygen rich ignition combustor, an included angle A between the axes of alternating current plasma generators on the two sides is greater than 50 degrees and less than 80 degrees, so that three plasma arcs are collected at the central axis of thecentral cylinder, so that the alternating current plasma-oxygen rich ignition combustor has the beneficial effects that the three plasma arcs are seamlessly connected at the axis of the central cylinder, then a continuous plasma arc fire core zone with the length L1 greater than or equal to 300 mm is formed, uninterrupted heating of the pulverized coal is achieved, and the stay duration of the pulverized coal at the fire core zone is prolonged, which are quite beneficial to ignition of carbon particles in coal, and therefore the alternating current plasma-oxygen rich ignition combustor is quite suitable for being used for igniting the inferior coal.

Description

technical field [0001] The invention belongs to the field of coal-fired boilers of thermal power plants, in particular to an AC plasma-oxygen-enriched ignition burner. Background technique [0002] Large thermal power coal-fired boilers need to consume a lot of fuel during cold start and low-load stable combustion. Therefore, a variety of fuel-saving technologies have emerged in recent years, and the widely used ones are micro-oil ignition technology and plasma ignition technology. Among them, plasma ignition technology has received extensive attention and research because it can achieve zero fuel consumption in boilers, but its ignition power is small, and it is mainly suitable for flammable coal types. Plasma ignition technology + big oil gun to support combustion. Plasma ignition technology is further divided into DC plasma ignition technology and AC plasma ignition technology. DC plasma ignition technology has the main defect of short electrode life, while AC plasma ign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/32F23D14/48F23D14/46
CPCF23D14/32F23D14/46F23D14/48Y02E20/34
Inventor 闫高程
Owner SHANXI UNIV
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