Measurement device for tangent circle diameter of fuel nozzle of power station boiler and measurement method thereof

Abstract

The invention discloses a measurement device for the tangent circle diameter of the fuel nozzle of a power station boiler and a measurement method thereof. The measuring device mainly comprises a rectangular steel plate, an infrared generator and a level gauge, wherein clamping grooves are processed on the longitudinal center line and bottom left position of the rectangular steel plate and used for the fixed installation of the infrared generator and the level gauge. According to the invention, a target distance can be accurately measured by utilizing the characteristics of infrared visibility and good positioning, and the theoretical tangent circle diameter can be obtained through simpler geometric calculation. The measurement method disclosed by the invention has the advantages of simple device, few measurement parameter and high accuracy. At present, the device and the calculation method are already successfully applied to the measurement of the theoretical tangent circle in the boilers of generator sets of multiple thermal power companies, and the accuracy and the reliability of measurement data are proved through an operating data result.

Description

technical field [0001] The invention relates to a measuring device and a measuring method for the tangential circle diameter of a power station boiler burner. Background technique [0002] The theoretical tangential circle diameter of the burner of a utility boiler is an important design parameter for the safe and economical operation of a thermal power unit. [0003] The larger diameter of the theoretical tangent circle has the following advantages for combustion in the furnace: 1) The rotational momentum increases and the disturbance is strong, which is beneficial to the burnout of the fuel; 2) The center of the flame is close to the primary tuyere, and the ignition conditions of the pulverized coal are good; 3) The fullness of the furnace is good, and the utilization rate of the furnace is high, which enhances the heat transfer effect of the water-cooled wall. [0004] However, when the theoretical tangent circle diameter of the burner is too large, the problems are as f...

AI Technical Summary

Problems solved by technology

[0004] However, when the theoretical tangent circle diameter of the burner is too large, the problems are as follows: 1) The actual tangent circle diameter increases, the wind speed of the wall increases, and the high-temperature flue gas is easy to stick to the wall and cause coking; 2) The burner is easy to deform, exceed 3) The weak wind area in the center of the furnace is too large, which reduces the utilization rate of the furnace volume; 4) Due to the high initial swirl intensity and the reduced attenuation speed, the residual torsion of the furnace outlet increases, which is very important to prevent the deviation of the furnace outlet smoke temperature unfavorable

At this stage, unit safety accidents emerge in endlessly due to inappropriate design or adjustment of the tangential circle diameter, which has brought huge hidden dangers to the safe production of power companies.

[0006] For a long time, the traditional wire-drawing method has been used for the theoretical tangential circle diameter. This method needs to hang a vertical wire on the furnace roof and pull the wire on the measurement plane. The workload is large; there are many influencing factors, the measurement data is rough, and the error is large. A simple and accurate measurement method emerges

The paper "Experimental Research on Calibration of Burners Using Laser Technology" mentioned a method of measuring the distance between the vertical and horizontal laser beams to obtain the diameter of the imaginary tangential circle. method to determine the geometric center of the furnace plane, the accuracy is low; 2) It is necessary to measure the distance between two laser beams in different directions, which is difficult to operate and has a large cumulative error; 3) The measuring equipment is complex and the workload is large

Images