Burning-out air and secondary air adjusting device of pulverized coal boiler

A pulverized coal boiler and regulating device technology, which is applied in the direction of combustion equipment, lighting and heating equipment, etc., can solve the problems of insufficient rigidity of the jet, and achieve the effects of simple structure, delay mixing, and promotion of mixing disturbance

Active Publication Date: 2014-07-30
DATANG BEIJING ENERGY MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of insufficient jet rigidity of the existing secondary air and overfired air under the condition of low load or low air volume, and further provide a pulverized coal boiler overfired air and secondary air regulating device

Method used

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  • Burning-out air and secondary air adjusting device of pulverized coal boiler
  • Burning-out air and secondary air adjusting device of pulverized coal boiler
  • Burning-out air and secondary air adjusting device of pulverized coal boiler

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specific Embodiment approach 1

[0010] Specific implementation mode one: combine figure 1 , figure 2 , image 3 This embodiment will be described. This embodiment includes a main air duct 1, an adjustment baffle 2, a rotating shaft 3, a partition 5, a high wind speed nozzle 6, a low wind speed nozzle 7, and the like. The clapboard 5 divides the main air duct 1 into a high-speed air duct 11 and a low-speed air duct 12. An eccentric adjustment baffle 2 is arranged in the main air duct in front of the clapboard. The rotating shaft 3 of the adjusting baffle is on one side of the low-speed air duct, and a group of small baffles 4 are arranged in the low-speed air duct 12 behind the baffle, and the different parts of the baffle 2 are respectively provided with high-speed small baffles 9 and low-speed small baffles. plate 10. The outlet of the high-speed air channel 11 is provided with a high-speed nozzle 6, and the outlet of the low-speed air channel 12 is provided with a low-speed nozzle 7.

specific Embodiment approach 2

[0011] Specific implementation mode two: combination figure 1 and Figure 5 To illustrate this embodiment, the device mainly includes A zone, B zone, C zone, and D zone. Among them, area A (the damper baffle control section) is mainly for air volume distribution, area B (connection section) is the connection section from the bellows to the nozzle, which can be a straight connection section or a curved connection section, and area C is the straight section before the nozzle , area D is the nozzle section.

specific Embodiment approach 3

[0012] Specific implementation mode three: combination figure 1 , figure 2 , image 3 and Figure 4 To illustrate this embodiment, the partition plate 5 divides the main air passage 1 into a high-speed air passage 11 and a low-speed air passage 12, and the area ratio between the high-speed passage 11 and the low-speed passage 12 is 4:6 to 6:4. The rotating shaft 3 is arranged on one side of the low-speed air duct. The adjusting baffle plate 2 is divided into two parts, long and short, by the rotating shaft 3, and the ratio of the two is 2:1 to 3.5:1. When the air door adjustment baffle is in the fully closed state, the adjustment baffle 2 is arranged obliquely in the air duct, the short side of the adjustment baffle is inclined towards the low-speed air duct side, and the inclination angle β is 6° to 15°, and the limit Plate 8 is limited. At the same time, small baffles are set on different parts of the adjustment baffle 2, wherein the high-speed small baffle 9 is locate...

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Abstract

The invention discloses a burning-out air and secondary air adjusting device of a pulverized coal boiler and relates to a volume adjusting device of the pulverized coal boiler. The invention aims at solving the problem that when an existing pulverized coal boiler runs with a low load, or the volume of the secondary air needs to be controlled by adopting air staging, the amount of the burning-out air or secondary air is reduced and the rigidity is insufficient, is solved. According to the burning-out air and secondary air adjusting device of the pulverized coal boiler, an air channel and a spray opening are partitioned into two or three parts by separation boards; the flow rate is adjusted through an eccentric air door baffle, a group of small separation boards and two small spoilers; at least part of air is jet flow with different openness degrees of an air door at the outlet so as to guarantee relatively good penetrability of the jet flow. The burning-out air and secondary air adjusting device is mainly used for air amount adjustment of a coal boiler.

Description

technical field [0001] The invention belongs to the air volume adjustment technology of a pulverized coal boiler, and in particular relates to a device for adjusting the overburning air and secondary air of a pulverized coal boiler. Background technique [0002] The tangential combustion technology of pulverized coal furnace generally refers to the way that the pulverized coal airflow is introduced into the furnace from the straight-through burners arranged at 4 corners (or 6 corners, 8 corners, on the water-cooled wall) of the furnace for tangential rotary combustion. The air-powder mixture from each corner works together to form a strong swirling fireball in the furnace. The geometric centerlines of the primary air, secondary air, tertiary air and exhaust air outlets are respectively tangent to one or several imaginary circles in the center. [0003] In the case of different loads, the flow rate of the primary air, secondary air, and tertiary air of each layer is increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C7/00
Inventor 李本锋陈晓萍张国柱
Owner DATANG BEIJING ENERGY MANAGEMENT
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