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A method and device capable of adjusting the secondary air volume of a swirl burner in real time

A technology of swirl burner and secondary air volume, which is applied in the direction of combustion method, burner, and air supply adjustment, and can solve the problems of reduced coal burnout rate, reduced secondary air entrainment capacity, and secondary air swirl intensity. problems such as weakening

Active Publication Date: 2020-10-09
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adjusting the angle of the secondary air blades has brought about the problem of weakening the swirl intensity of the secondary air at the outlet of the burners on both sides, and the weakening of the swirl intensity of the secondary air will also result in a decrease in the entrainment capacity of the secondary air and a decrease in the burnout rate of pulverized coal. question
The method of adjusting the flow area of ​​the secondary air passage of the burner needs to adjust the flow area of ​​the secondary air passage of all the burners in the burner layer at the same time to meet the requirements of the secondary air volume of the target burner, and the adjustment range is limited Or adjust the problem of poor linearity

Method used

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  • A method and device capable of adjusting the secondary air volume of a swirl burner in real time
  • A method and device capable of adjusting the secondary air volume of a swirl burner in real time
  • A method and device capable of adjusting the secondary air volume of a swirl burner in real time

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Embodiment 1

[0034] This embodiment provides a method that can adjust the secondary air volume of the swirl burner in real time. Taking the relatively common counter-fired boiler in China as the research object, in order to ensure the swirl intensity of the secondary air at the exit of the coal swirl burner and the swirl burner On the premise that the secondary air flow area does not change, the secondary air volume required by each burner can be adjusted in real time by adjusting the inlet pressure of the secondary air pipe of each swirl burner on the burner layer in operation.

[0035] Please refer to the attached figure 1 It is a flowchart of a method for adjusting the secondary air volume of a swirl burner in real time according to an embodiment of the present invention. The invention provides a method that can adjust the secondary air volume of the swirl burner in real time. The invention mainly takes the relatively common counter-fired boiler in China as the research object, and adju...

Embodiment 2

[0054] Please refer to the attached figure 2 , is a schematic diagram of a device that can adjust the secondary air volume of the swirl burner in real time according to Embodiment 2 of the present invention. Taking the relatively common counter-firing boiler in China as the research object, by adjusting the inlet pressure of the secondary air pipe of each swirl burner on the burner layer put into operation, the device includes: an outlet pressure sensor 1, which is used to detect the secondary air duct pressure of the swirl burner. outlet pressure of the secondary air duct; inlet pressure sensor 2, used to detect the inlet pressure of the secondary air duct of the swirl burner; pressure regulating baffle, used to adjust the inlet pressure of the secondary air duct of the swirl burner; processor Connect the outlet pressure sensor 1, the inlet pressure sensor 2 and the pressure adjustment baffle, and adjust the opening of the pressure adjustment baffle in real time according to...

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Abstract

The invention discloses a method and device capable of adjusting secondary air volume of a swirl burner in real time. According to the method and device, an inclination angle of a secondary air bladeof the swirl burner is calculated according to the secondary air target swirling intensity of the swirl burner; the resistance of the swirl burner is calculated according to the inclination angle of the secondary air blade of the swirl burner and the target secondary air volume of the swirl burner; the pressure of an inlet of a secondary air pipe required by the swirl burner is calculated according to the detected pressure of an outlet of the secondary air pipe of the swirl burner and the calculated resistance of the swirl burner; the pressure of the inlet of the secondary air pipe of the swirl burner is adjusted in real time according to the calculation result of the pressure of the inlet of the secondary air pipe required by the swirl burner, so that the actual secondary air volume of the swirl burner is matched with the target secondary air volume. According to the method and device, the secondary air volume required by the swirl burner can be adjusted in real time on the premise that the swirl intensity of the secondary air of the swirl burner is not changed and a secondary air through-flow area of the swirl burner is not changed either.

Description

technical field [0001] The invention relates to the technical field of power plant boilers, in particular to a method and device for real-time adjustment of the secondary air volume of a swirl burner. Background technique [0002] Swirl burners have been widely used in power plant boilers because of their strong combustion stability and wide adaptability to coal types. During the operation of the swirl burner, since the pressure in the middle of the secondary air box is slightly higher than the pressure on both sides, this makes the burner on the same layer operate under the same working condition of the secondary air blade angle or the secondary air channel flow area. , the secondary air volume of the middle burner is slightly higher than the secondary air volume of the burners on both sides, which is also one of the important reasons for the high temperature corrosion of the water wall of the side wall of the opposed combustion boiler. [0003] Therefore, domestic power s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/24F23D14/70F23L9/00F23N3/00
CPCF23D14/24F23D14/70F23L9/00F23N3/005
Inventor 李剑童家麟吕洪坤齐晓娟
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY