A Method for Adjusting the Center Offset of Boiler Four-Corner Tangential Combustion Flame
A technology of burning flame and four-corner tangent circle is applied in the field of adjusting the four-corner tangent circle arrangement of boiler burners, which can solve problems such as overheating of pipes, pipe bursting, and deterioration of flame filling degree, and achieve the effect of accurate and convenient adjustment.
Active Publication Date: 2020-05-22
JILIN UNIV
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Problems solved by technology
If the center of the flame is deflected, the degree of fullness of the flame will be greatly deteriorated, resulting in a large deviation of the smoke temperature between the left and right sides of the boiler, and the uneven heating of the water wall, which may damage the normal water circulation and cause the tube to overheat, swell or burst.
In addition, the deflection of the flame center will inevitably lead to a large difference in the smoke temperature at the left and right sides of the furnace outlet, which may lead to local overheating of the superheater tube
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[0052] The present invention provides a method for adjusting the center offset of combustion flames with tangential circles at four corners of a boiler, which includes the following steps:
[0053] Step 1. For the calculation of the height of the flame center, establish the equation
[0054] M=A-0.5X h ;
[0055] In the formula, M is the flame center position coefficient; A is an empirical constant, and the value depends on the coal quality. When the coal type is anthracite and lean coal, it is 0.56, and when the volatile content of coal is high, it is 0.59; X h is the height of the flame center;
[0056] Step 2. Measure the temperature of the flue gas at the furnace outlet during operation, and deduce M by the following relational formula:
[0057] θ=T a [1-M(α 1 Ψ pj T 2 a f 1 / (10800B j Q a ))] - 273.15;
[0058] Q a =Q ar,net,p ×(100-q gt -q qt -q hz ) / (100-q gt )+Q k ;
[0059] T a = θ a +273;
[0060] In the formula, θ is the flue gas temperature at ...
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The invention discloses a method for adjusting deviation of the center of a four-corner tangential combustion flame in a boiler. The method comprises the following steps of firstly, calculating the height XH of the center of the flame in the boiler, secondly, monitoring the temperatures of a plurality of outer walls with the same height as the flame center height of an outer wall of a boiler hearth, recording the temperature data and making a temperature fitting curve, thirdly, integrating through the temperature fitting curve to calculate a temperature average value, fourthly, comparing the temperature average value with the temperatures of a front wall and a rear wall to judge the deviation of the center of the flame in the longitudinal direction, comparing the temperature average valuewith a left wall and a right wall to judge the deviation of the center of the flame in the transverse direction, determining a transverse deviation distance of the flame center through a highest pointof a temperature fitting curve of the front wall and the rear wall, and determining a longitudinal deviation distance of the flame center through a highest point of a temperature curve of the left wall and the right wall, and fifthly, adjusting the center of the flame according to the transverse deviation distance and the longitudinal deviation distance.
Description
technical field [0001] The invention relates to the technical field of arrangement adjustment of four-corner tangential circles of a boiler burner, in particular to a method for adjusting the center offset of a boiler four-corner tangential circle combustion flame. Background technique [0002] Flame center adjustment is a very important work in combustion adjustment. It not only plays a decisive role in the quality of the combustion process, but also has a great impact on the safety of the heating surface. If the center of the flame is deflected, the degree of fullness of the flame will be greatly deteriorated, resulting in a large deviation of the smoke temperature between the left and right sides of the boiler, and the uneven heating of the water wall, which may damage the normal water circulation and cause the tube to overheat, swell or burst. . In addition, the deflection of the flame center will inevitably lead to a large difference in the smoke temperature at the lef...
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IPC IPC(8): F23C99/00
CPCF23C99/00
Inventor 金英爱全鸣玉田丛邢耀宏蒋志鹏
Owner JILIN UNIV