A combustion adjustment method for improving sncr denitrification efficiency
A technology of denitration efficiency and combustion adjustment, applied in combustion methods, combustion control, and fuel supply regulation, can solve problems such as low denitration efficiency, and achieve the effects of improving denitration efficiency, increasing coal feed, and increasing residence time.
Active Publication Date: 2016-03-02
WUHAN JIUZHOU 3D COMBUSTION TECH
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the problem of low denitrification efficiency existing in the application of SNCR technology in existing four-corner tangential boilers, and to provide a combustion adjustment method suitable for four-corner tangential boilers to improve SNCR denitrification efficiency, which can quickly and effectively reduce NO X The amount of generation, improve the efficiency of SNCR denitrification
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[0019] Now describe the implementation process of the present invention with reference to the accompanying drawings, as figure 1 As shown, it is a schematic diagram of the structure of the four-corner tangential circle boiler and the arrangement of the nozzles of the burner. The marks in the figure show the superheater 101, the furnace area 102, the burner area 103, and the ash hopper 104. The primary air and pulverized coal nozzles are D, F, I and K; secondary air nozzles are A, B, C, E, G, H, J and L; tertiary air nozzles are M and N.
[0020] Such as figure 2 As shown, it is a schematic diagram of the combustion system of a four-corner tangential circle boiler. In the figure, the left wall 106, the front wall 107, and the measurement point 108 are marked.
[0021] Such as image 3 As shown, it is a schematic diagram of the position of the SNCR nozzle of the four-corner tangential combustion boiler. In the upper part of the furnace combustion area and the flue gas tempera...
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The present invention proposes a combustion adjustment method for improving SNCR denitrification efficiency, which has the following implementation steps: a. use the boiler three-dimensional temperature field online monitoring system to monitor in real time and judge the temperature in the SNCR injection area; b. detect that the obtained SNCR injector area exceeds the maximum Optimal temperature window, implement pagoda-style coal supply and air supply, increase the primary and secondary air volume of the lower burner, reduce the primary and secondary air volume of the upper burner, and at the same time adjust the primary air and secondary air outlet direction to the horizontal plane c. The detected area of the SNCR injector is lower than the optimum temperature window, implement an inverted pagoda type coal supply air supply, increase the primary air coal supply volume of the upper burner and the upper primary and secondary air volume , reduce the primary air to the coal burner in the lower layer and the primary and secondary air volume in the lower layer. The invention improves the combustion efficiency of the boiler, reduces the generation of NOX, and simultaneously improves the denitrification efficiency of the SNCR.
Description
technical field [0001] The invention relates to a combustion adjustment technology for a four-corner tangential circle boiler, in particular to a combustion adjustment method for improving SNCR denitrification efficiency. Background technique [0002] The four-corner tangential boiler is the main furnace type for burning low-volatile lean coal and anthracite. It has the following characteristics: air graded air supply, fuel graded combustion, pulverized coal has a long journey in the furnace, a long residence time in the furnace, and is affected by neighbors. The direct scour of high-temperature flue gas strengthens the combustion. Therefore, it has the advantages of good furnace fullness, large disturbance, favorable embers, and low-load stable combustion. The coal type of the four-corner tangential boiler has strong adaptability, and is especially suitable for the national conditions of my country's diverse coal types. [0003] In 2011, my country's "Thermal Power Plant ...
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IPC IPC(8): F23N5/00F23N1/02
Inventor 曾雄伟方庆艳张向宇周怀春
Owner WUHAN JIUZHOU 3D COMBUSTION TECH