A method and measuring device for making the air intake of the secondary air pipe of the swirl burner uniform
A technology of swirl burner and secondary air pipe, which is applied in the direction of combustion method, burner, burner for burning powder fuel, etc., and can solve problems such as uneven pressure and uneven secondary air volume
Active Publication Date: 2017-04-12
NORTH CHINA ELECTRICAL POWER RES INST +1
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[0009] The invention provides a method and a measuring device for making the air intake of the secondary air duct of the swirl burner uniform, so as to solve the problem of uneven secondary air volume entering the secondary air duct of the swirl burner due to the non-uniform internal pressure of the bellows
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[0030] In order to make the technical features and effects of the present invention more obvious, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings. The present invention can also be described or implemented in other different specific examples. The equivalent transformations done within all belong to the protection category of the present invention.
[0031] like figure 1 As shown, it is a flowchart of a method for making the air intake of the secondary air pipe of the swirl burner uniform in an embodiment of the present invention, and the method includes:
[0032] Step S1: Detect the pressure at the inlet of the secondary air pipe of the swirl burner. Specifically, the pressure at the inlet of the secondary air pipe of the swirl burner is detected by installing a pressure sensor (such as a micromanometer) at the inlet of the secondary air pipe of the swirl burner.
[0033] Step S2: Adjust the flow...
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The invention provides a method for making the air inflows of secondary air pipes of a turbulent burner even and a measuring device. The method includes the steps that the pressure of an inlet of each secondary air pipe of the turbulent burner is detected; and according to the pressure of the inlet of each secondary air pipe of the turbulent burner, the flow area of each secondary air pipe is adjusted, so that the equation shown in the specification is satisfied, wherein Ai is the flow area of the ith secondary air pipe of the turbulent burner, Pi is the pressure of the inlet of the ith secondary air pipe of the turbulent burner, deltaPmx is the largest difference value of the pressure of the corresponding secondary air pipe of the turbulent burner and the negative pressure of a hearth, and const is a constant. By the adoption of the method and the cutter, the problems that the air inflows of the secondary air pipes of the turbulent burner are not even due to the fact that the pressures inside an air box are not uniform can be solved.
Description
technical field [0001] The invention belongs to the field of swirl burners, in particular to a method and a measuring device for making the air intake of a secondary air duct of a swirl burner uniform. Background technique [0002] The pulverized coal burner is the main part of boiler combustion. The performance of the burner has a great influence on the stability and economy of combustion. Therefore, it is very important to adopt a reasonable combustion method and stable combustion technology for the operation of the unit. The swirl burner can use the high-temperature flue gas in the central recirculation area to ignite the air-powder mixture, which improves the stability of the flame, and occupies a certain proportion in the application field of power plant boilers. During the operation of the swirl burner, the primary air channel is located in the middle of the burner, and the primary air is straight, and the secondary air enters from both sides of the large wind box in t...
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IPC IPC(8): F23D1/02
Inventor 赵振宁张清峰李金晶李战国李媛园
Owner NORTH CHINA ELECTRICAL POWER RES INST