Secondary air online measuring method for turbulent burner

A swirl burner and measurement method technology, applied in the combustion method, combustion chamber, control combustion and other directions, can solve the problem of difficulty in measuring the secondary air of the swirl burner

CN108386867AActive Publication Date: 2018-08-10BEIJING YUANSHEN ENERGY SAVING TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-08-10

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Abstract

The invention provides a secondary air online measuring method for a turbulent burner, and the secondary air online measuring method is used for measuring the air speed in a secondary air duct of theturbulent burner. The measuring method comprises the following steps of selecting three measuring radiuses in the secondary air duct, wherein three circumferences taking the central point of the secondary air duct as the center of a circle by the three measuring radiuses, and the three circumferences are successively an inside circumference, a middle circumference and an outside circumference; anddividing the radial cross section of the secondary air duct into four annular regions by the three circumferences, wherein the radiuses of the three circumferences are successively r1, r2 and r3. Themethod provided by the invention can measure the blast capacities of secondary air hoses truly and effectively, provides a good basis for optimizing air distribution, optimizes the air distribution mode, reduces the electric consumption of a fan, reduces the station service power consumption rate, and improves the economical efficiency of a boiler.
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Description

technical field

[0001] The invention relates to the technical field of coal-fired units, in particular to the measurement of secondary air of a swirl burner of a boiler, that is, an online measurement method for the secondary air of a swirl burner. Background technique

[0002] After the coal-fired unit is put into operation, there are generally a series of problems affecting the safe and economical operation of the boiler, such as the large temperature difference between the two sides of the water wall and the NOx concentration of the flue gas at the furnace outlet far exceeding the design value. Through a series of tests, it was found that the secondary air volume distribution characteristics of the burners on the same floor are generally poor, and the inability to accurately adjust the secondary air intake to the burners on the same floor is one of the important factors leading to the above problems. At present, coal-fired units do not have a reliable secondary air meter ...

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Embodiment Construction

[0084] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0085] like figure 1 , figure 2 and image 3 As shown, the present invention proposes an online measurement device for secondary air of a swirl burner, which is used to measure the wind speed in the secondary air duct of a swirl burner. The online measurement device for secondary air of a swirl burner includes:

[0086] Three sets of primary measuring elements are radially distributed in three circles of the radial section of the secondary air duct, each set of primary measuring elements includes four primary measuring pieces arranged on the same circumference, each of the primary measuring One piece measures one measuring point, three groups of primary measuring elements contain 12 primary measuring elements in total; each measuring point is provided with one said...