Combustor and boiler

By designing axial channels and angled injection of combustion-supporting media in the burner, the problem of plasma ignition technology being unable to ignite low-volatile coals has been solved, achieving stable combustion and fuel-saving effects in the burner.

CN115289492BActive Publication Date: 2026-07-17YANTAI LONGYUAN POWER TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANTAI LONGYUAN POWER TECH
Filing Date
2022-09-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing plasma ignition technology is difficult to effectively ignite low-volatile coal, resulting in limited fuel-saving effects and easy burner slagging and burn-out.

Method used

Design a burner including a combustion cylinder, an ignition source, a first combustion-supporting cylinder, a second combustion-supporting cylinder, and an injection device. By forming an axially extending channel and injecting the combustion-supporting medium at an angle to premix it with the fuel gas flow, the flow velocity and rigidity of the combustion-supporting medium are reduced, avoiding direct injection into the combustion zone. Combined with a plasma ignition source, stable combustion of pulverized coal gas flow is achieved.

Benefits of technology

It improved the ignition success rate of low volatile coal, reduced burner slagging and burn-off, and achieved long-term stable operation of the burner and fuel-saving effect.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115289492B_ABST
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Abstract

The present disclosure provides a burner and a boiler. The burner comprises: a combustion cylinder; an ignition source having an ignition end disposed in the combustion cylinder; a first combustion cylinder, a first passage extending along an axial direction of the combustion cylinder is formed between the ignition source and the first combustion cylinder, the first passage is configured to deliver a partial fuel gas stream to the ignition end; a second combustion cylinder located in the combustion cylinder and sleeved outside a downstream end of the first combustion cylinder, a second passage extending along an axial direction of the combustion cylinder is formed between the first combustion cylinder and the second combustion cylinder; and a first injection device having a first nozzle disposed in the second passage, a jet direction of the first nozzle is at an angle with a gas flow direction of the second combustion cylinder, the first injection device is configured to inject a first combustion medium into the second passage, the second passage is configured to mix the partial fuel gas stream other than the first combustion cylinder and the first combustion medium to form a first mixed gas stream, and deliver the first mixed gas stream to the downstream end of the first combustion cylinder.
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