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Method for measuring horizontal angle of nozzle of four-corner tangential burner

A burner nozzle and measurement method technology, which is applied to measuring devices, instruments, optical devices, etc., can solve the problems of large measurement error and difficulty in accurately measuring the horizontal angle of the burner nozzle, and achieves convenient operation, easy implementation, and flexible layout. Effect

Inactive Publication Date: 2019-04-09
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the installation of the boiler infrastructure, the installation angle is measured by setting the line to the center of the furnace based on the base at the rear of the burner nozzle. However, it is generally not possible to use the rear base of the burner nozzle (at frame structure), it is difficult to accurately measure the horizontal angle of the burner nozzle
[0004] At present, there are no standards and specifications for measuring the horizontal angle of the four-corner tangential burner nozzle. The existing methods mostly rely on the experience of technicians, and the general measurement error is relatively large.

Method used

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  • Method for measuring horizontal angle of nozzle of four-corner tangential burner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Calculate the angle between the burner nozzle (1) and the second retaining wall (6) through the inverse cotangent function, and the calculation steps are as follows:

[0029] Step 1, obtain the length a of the first parapet (4);

[0030] Step 2, obtain the distance b between the position of the burner and the first parapet (4);

[0031] Step 3, obtain the distance c between the light falling point (5) and the second parapet (6);

[0032] Step 4, calculate the angle between the burner nozzle (1) and the second parapet (6) by the following formula:

[0033] α=(arccot(b / c)+arccot(b / a)) / 2

[0034] α is the angle between the burner nozzle (1) and the second retaining wall (6), and arccot ​​is the inverse cotangent function.

[0035] When in use, arrange multiple burner nozzles according to actual needs, and calculate the angle between the burner nozzles and the retaining wall one by one according to the above method.

Embodiment 2

[0037] Calculate the angle between the burner nozzle (1) and the second retaining wall (6) through the arcsine function, and the calculation steps are as follows:

[0038] Step 1, obtain the length a of the first parapet (4);

[0039] Step 2, obtain and calculate the distance d between the position of the burner and the light source (3);

[0040] Step 3, obtain the distance c between the light falling point (5) and the second parapet (6);

[0041] Step 4, obtain the distance e between the position of the burner and the falling point of light (5);

[0042] Step 5, calculate the angle between the burner nozzle (1) and the second parapet (6) by the following formula:

[0043] α=(arcsin(c / e)+arcsin(a / d)) / 2

[0044] α is the angle between the burner nozzle (1) and the second retaining wall (6), and arcsin is an arcsine function.

[0045] When in use, arrange multiple burner nozzles according to actual needs, and calculate the angle between the burner nozzles and the retaining w...

Embodiment 3

[0047] Calculate the angle between the burner nozzle (1) and the second retaining wall (6) through the arccosine function, and the calculation steps are as follows:

[0048] Step 1, obtain the distance b between the position of the burner and the first parapet (4);

[0049] Step 2, obtain the distance d between the position of the burner and the light source (3);

[0050] Step 3, obtain the distance e between the position of the burner and the falling point of light (5);

[0051] Step 4, calculate the angle between the burner nozzle (1) and the second parapet (6) by the following formula:

[0052] α=(arccos(b / d)+arccos(b / e)) / 2

[0053] α is the angle between the burner nozzle (1) and the second retaining wall (6), and arccos is an arccosine function.

[0054] When in use, arrange multiple burner nozzles according to actual needs, and calculate the angle between the burner nozzles and the retaining wall one by one according to the above method.

[0055] The horizontal angle...

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Abstract

The invention relates to a method for measuring a horizontal angle of a nozzle of a four-corner tangential burner. The nozzle of the burner is provided with a reflective plate, the reflective plate isparallel to a plane in which the nozzle of the burner is, a light source is arranged at a position of an opposite angle of the nozzle of the burner, light emitted by the light source is reflected bythe reflective plate and then falls onto a first protective wall, a distance between a light falling point and a second protective wall is measured, and an included angle between the nozzle of the burner and the second protective wall is calculated through an arc-tangent function. The method for measuring the horizontal angle of the nozzle of the four-corner tangential burner measures accurately,is convenient to operate in the site, is easy to implement in the site, is simple and flexible, and is low-cost. The light source and the reflective plate are easy to obtain, and the arrangement is flexible.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a method for measuring the horizontal angle of a nozzle of a four-corner tangential circle burner. Background technique [0002] The burner is the main equipment of the boiler in the thermal power plant, and the four-corner tangential circle burner is a main structural form. Pulverized coal fuel and auxiliary air enter the furnace for combustion through the burners arranged at the four corners of the furnace. The horizontal angle of the burner is a key boundary parameter for forming the tangent circle and position of the air flow in the furnace, which will affect the combustion efficiency and the safety of the burner and the heating surface. [0003] During the installation of the boiler infrastructure, the installation angle is measured by setting the line to the center of the furnace based on the base at the rear of the burner nozzle. However, it is generally not possibl...

Claims

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Application Information

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IPC IPC(8): G01B11/26
CPCG01B11/26
Inventor 赵虞凌黄建军吉宪磊苏超赵方渊匡世才赵斯楠刘志华郭松涛党岳牛波郭艳玲王文鼎李超石敏祁超
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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