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A Swirl Pulverized Coal Burner with Variable Flare

A pulverized coal burner, a variable technology, is used in burners, burners burning pulverized fuel, combustion types, etc. The effect of stable combustion performance and improved ignition ability

Active Publication Date: 2022-02-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low load regulation ratio and poor low-load stable combustion ability of the current power station pulverized coal boiler, and to provide a swirl pulverized coal burner with variable expansion

Method used

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  • A Swirl Pulverized Coal Burner with Variable Flare
  • A Swirl Pulverized Coal Burner with Variable Flare
  • A Swirl Pulverized Coal Burner with Variable Flare

Examples

Experimental program
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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1-Figure 5 Describe this embodiment, a variable flared swirl pulverized coal burner described in this embodiment, which includes a primary air duct 1, an inner secondary air duct 2, an outer secondary air duct 3, and an outer secondary air swirl Flow vanes 4 and inner secondary wind swirl vanes 5; it also includes a flared assembly; the primary air duct 1, the inner secondary air duct 2 and the outer secondary air duct 3 are arranged sequentially from the inside to the outside, and the outer secondary air swirl The blade 4 is set between the inner secondary air duct 2 and the outer secondary air duct 3, the inner secondary air swirl blade 5 is set between the primary air duct 1 and the inner secondary air duct 2, and the flare assembly is installed on the outer secondary air duct. The outlet of the secondary air duct 3.

specific Embodiment approach 2

[0020] Specific implementation mode two: combination Figure 1-Figure 5 Describe this embodiment, a swirl pulverized coal burner with variable flare described in this embodiment, the flare assembly includes a fixed external secondary air flare 10, a retractable external secondary air flare 6, a plurality of telescopic Rod 8 and multiple telescopic motors 9; the fixed external secondary air flare 10 is a conical shell, the fixed external secondary air flare 10 is installed at the outlet of the external secondary air pipe 3, and multiple telescopic motors 9 are evenly distributed on the On the outer wall of the fixed external secondary air flare 10, each telescopic motor 9 is provided with a telescopic rod 8, and the extension end of each telescopic motor 9 is fixedly connected with one end of the telescopic rod 8, and the other end of the telescopic rod 8 It is fixedly connected with the expandable external secondary air flare 6. Other methods are the same as in the first embo...

specific Embodiment approach 3

[0021] Specific implementation mode three: combination Figure 1-Figure 5 Describe this embodiment, a variable flared swirl pulverized coal burner described in this embodiment, the retractable outer secondary air flare 6 includes a plurality of arc-shaped plates; the plurality of arc-shaped plates are sequentially spliced ​​along the circumferential direction to form a Outer retractable outer secondary air flare 6. Other methods are the same as in the second embodiment.

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Abstract

A swirl pulverized coal burner with variable flare. The invention relates to a pulverized coal burner. The purpose of the invention is to solve the problems of low load adjustment ratio and poor low-load stable combustion ability of pulverized coal boilers in power stations. It includes Primary air duct, inner secondary air duct, outer secondary air duct, outer secondary air swirl vane and inner secondary air swirl vane; it also includes flaring components; primary air duct, inner secondary air duct and fixed Outer secondary air flaring and retractable outer secondary air flaring are set sequentially from the inside to the outside, the outer secondary air swirl blades are set between the inner secondary air pipe and the outer secondary air pipe, and the inner secondary air swirl The blades are arranged between the primary air duct and the inner secondary air duct, and the flaring assembly is installed at the outlet of the outer secondary air duct. The invention is used in the field of boilers.

Description

technical field [0001] The invention relates to a pulverized coal burner, in particular to a variable flare swirl pulverized coal burner, which is particularly suitable for the fields of power station pulverized coal boilers and industrial pulverized coal boilers. Background technique [0002] Power station boilers are still the main source of electricity in my country. In 2019, the national power generation capacity was 7,325.3 billion kwh, of which the cumulative power generation capacity of thermal power units was 5.045 billion kwh, accounting for about 72.79% of the country's cumulative power generation capacity. In 2019, the country's installed power generation capacity will be about 2 billion kilowatts, a year-on-year increase of about 5.5%. For a period of time to come, the main force of my country's power system will still be coal-fired thermal power generation, and thermal power generation is relatively stable with great potential for peak regulation. In the study ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/02F23L1/00F23L9/00
CPCF23D1/02F23L1/00F23L9/00
Inventor 陈智超乔彦宇郑玉曾令艳李争起
Owner HARBIN INST OF TECH