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A split type secondary air box for w flame boiler

A secondary air box and secondary air technology, which is applied in the transportation of non-flammable liquid/gas, combustion methods, lighting and heating equipment, etc., can solve the problems of lack of wind, high CO emissions, high carbon content of fly ash combustibles, etc. question

Active Publication Date: 2020-10-27
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 that the air volume in the secondary air box of the existing W flame boiler gradually decreases from both sides to the center, resulting in a lack of air in the middle of the furnace, which leads to high CO emissions and high carbon content in fly ash combustibles, and further provides a Split type secondary air box for W flame boiler

Method used

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  • A split type secondary air box for w flame boiler
  • A split type secondary air box for w flame boiler
  • A split type secondary air box for w flame boiler

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Experimental program
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specific Embodiment approach 1

[0027] Specific implementation mode one: combine Figure 5-Figure 7Describe this embodiment, the split type secondary air box for W flame boiler described in this embodiment, it includes upper air box 1, lower air box 13, multiple arched secondary air nozzles 9, multiple lower air box partitions plate, a plurality of secondary air nozzles 11 under the arch and a plurality of secondary air doors 12 under the arch, it also includes the upper and lower bellows partitions 7, two upper bellows partitions 2, two side air doors 5 and a plurality of small air ducts 10. The upper bellows 1 is installed above the lower bellows 13, the upper and lower bellows partitions 7 are installed between the upper bellows 1 and the lower bellows 13, and the two upper bellows partitions 2 are relatively installed on the inner wall of the upper bellows 1 and passed through two The upper bellows partition 2 divides the upper bellows 1 into the main arch air chamber 3 and two side arch air chambers 4, ...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination Figure 5 and Figure 6 Describe this embodiment, the split type secondary air box for W flame boiler described in this embodiment, it also includes four wind measuring devices 6, the two sides of the main arch air chamber 3 are respectively equipped with a wind measuring device Device 6, each side arch air chamber 4 is provided with a wind measuring device 6 close to the side air door 5, the air volume in each arch air chamber is determined according to the principle of thirds: that is, by adjusting the opening of the side air door 5, the three air supply The air volume in the air unit is always consistent. Other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Specific implementation mode three: combination Figure 1-Figure 2 Describe this embodiment, the split type secondary air box for W flame boiler described in this embodiment. One end and the other end of the bent plate are fixedly connected with the inner wall of the upper bellows 1 . Other methods are the same as in the first embodiment.

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Abstract

The invention discloses a split type secondary bellows for a W-flame boiler, relates to a secondary bellows and aims at solving the problems that the middle part of a hearth is short of air and further CO emission is high and the carbon content of combustible matters in fly ash as the air quantity of an existing secondary bellows for the W-flame boiler is gradually reduced from two sides to the center. The split type secondary bellows comprises an upper bellows, a lower bellows, arch upper secondary air nozzles, lower bellows separation boards, arch lower secondary air nozzles, arch lower secondary air registers, an upper-lower bellows separating board, upper bellows separation boards, side air doors and small air ducts; the upper-lower bellows separating board is arranged between the upper bellows and the lower bellows; the upper bellows is divided into a main arched air chamber and two side arched air chambers by the two upper bellows separation boards; a plurality of ventilation openings are processed in the upper-lower bellows separating board below each side arched air chamber; one small air duct is correspondingly arranged below each ventilation opening; and the top ends of the small air ducts are fixedly connected with the bottom end of the upper-lower bellows separating board. The split type secondary bellows disclosed by the invention is applied to the field of power station boilers.

Description

technical field [0001] The invention relates to a secondary air box, in particular to an equal-split secondary air box for a W flame boiler. Background technique [0002] W Flame Boiler is a utility boiler specially designed for burning low volatile and refractory coal. It has the advantages of high furnace temperature and long combustion stroke of pulverized coal airflow. China has introduced W flame boilers from North Africa and Western Europe since the 1990s. Due to the rich reserves of anthracite and lean coal resources in China and the low price compared with other power coals, W flame boilers have been widely used soon and become one of the main furnace types for thermal power generation. Up to now, there have been more than 130 W flame boilers under construction or already built in China, with a total installed capacity of more than 41,000MW, accounting for 80% of the world's total inventory. [0003] The air supply system of the W flame boiler consists of two part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L9/06
CPCF23L9/06
Inventor 李争起杜贺韩徽张鑫曾令艳陈智超
Owner HARBIN INST OF TECH