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Little oil gasification and burning lateral-igniting center coal powder-feeding swirling burner

A technology of swirling burners and burners, which is applied in the direction of burning powder fuel burners, burners, combustion ignition, etc., and can solve problems such as wear and tear

Inactive Publication Date: 2008-01-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of fuel saving when the large pulverized coal boiler using the swirl burner reduces NOx emissions at the same time when the utility boiler is started, stopped, and low-load stable combustion, and the problem of wear and tear caused by long-term use , a small amount of oil gasification combustion side ignition center to the powder swirl burner is proposed

Method used

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  • Little oil gasification and burning lateral-igniting center coal powder-feeding swirling burner

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specific Embodiment approach 1

[0006] Specific embodiment one: (see Fig. 1, Fig. 2) this embodiment consists of a burner primary air duct 1, a first truncated conical separating ring 2-1, a second truncated conical separating ring 2-2, and a third truncated conical separating ring 2-3. Internal swirler 3. Secondary air passage inside the burner 4. External swirler 5. Secondary air passage outside the burner 6. Burner 7. Inverted "V"-shaped partition 8. Secondary combustion Chamber 9, primary combustion chamber 10, auxiliary oil gun 11, main oil gun casing 12, ignition gun 13, main oil gun 14 and flame detector tube 15, the outlet end of the primary air duct 1 of the burner is the burner 7, The secondary air duct 4 inside the burner is fixed on the outer surface of the outlet end of the primary air duct 1 of the burner, the inner swirl 3 is fixed between the primary air duct 1 of the burner and the secondary air duct 4 inside the burner, and the outer swirl flow The device 5 is fixed on the outer surface of ...

specific Embodiment approach 2

[0007] Specific embodiment two: (see Fig. 1) the head of the main oil gun 14, auxiliary oil gun 11, ignition gun 13 and main oil gun casing 12 of the present embodiment faces the direction of the nozzle 7 of the primary air duct 1 of the burner Set on one side of the primary air duct 1 of the burner, the tails of the main oil gun 14, auxiliary oil gun 11, ignition gun 13 and main oil gun casing 12 are warped outwards, the main oil gun 14, auxiliary oil gun 11, ignition gun 13 and the angle between the main oil gun casing 12 and the centerline of the burner are 55° to 65°. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0008] Specific embodiment three: (referring to Fig. 1) the included angle of main oil gun 14, auxiliary oil gun 11, ignition gun 13 and main oil gun casing 12 and burner center line of this embodiment is 60 °. Others are the same as in the second embodiment.

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Abstract

The invention relates to swirl-flow burner. The first, second, and third truncated cone shape separating rings are orderly set at the middle of the burner primary flue in which the backward V shape separator is fixed at the right of the third truncated cone shape separating ring. The invention can greatly reduce initiation energy, satisfy the demands of start stop, and under load stable combustion for boiler, prolong coal dust residence time, control NOx production, form fractional combustion to combine with center feeding, realize NOx low discharge owing to secondary draft is divided into inner and outer two parts.

Description

technical field [0001] The invention relates to a swirl burner. Background technique [0002] In the large-capacity power plant boilers operating in my country, the amount of oil used for boiler ignition and low-load stable combustion is huge. In order to save fuel, power generation companies shift the focus of fuel saving from the low-load stable combustion process to the boiler ignition and shutdown process (when the power plant boiler starts and stops Fuel consumption accounts for 60%, low-load stable fuel consumption accounts for 40%). According to the traditional method, the ignition oil gun is arranged in the secondary air port of the burner. The distance between the oil gun and the pulverized coal nozzle is relatively far, and the two airflows are parallel to each other. Therefore, the heat generated by the fuel oil is directly used for heating during ignition. The part of pulverized coal is relatively small, and the heat utilization rate is low, so that when the boil...

Claims

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Application Information

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IPC IPC(8): F23D1/02F23Q11/00F23D17/00
Inventor 李争起陈智超果志明秦裕琨
Owner HARBIN INST OF TECH
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