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Device and method for measuring speed and concentration of dusty airflow

A technology of air velocity and concentration, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., can solve the problems that have not yet formed mature and reliable measurement products, achieve easy sealing, ensure representativeness, and improve correlation sexual effect

Pending Publication Date: 2021-01-26
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Some scholars have conducted research based on differential pressure method, heat balance method, electrical method, ultrasonic method, etc., but no mature and reliable measurement products have been formed yet.

Method used

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  • Device and method for measuring speed and concentration of dusty airflow
  • Device and method for measuring speed and concentration of dusty airflow
  • Device and method for measuring speed and concentration of dusty airflow

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0028] In the flowing air flow, due to the air pressure difference caused by the speed difference between the upper and lower surfaces, the airfoil will receive a lift force, which can generally be calculated by the following formula:

[0029]

[0030] ρ airflow density, v the relative velocity of airfoil and airflow, C s is the lift coefficient, A is the projected area of ​​the airfoil, and the lift coefficient C s It is related to the shape of the airfoil and the angle between the airfoil and the airflow. For a specific airfoil, when the angle between the airfoil and the airflow is constant, the above formula can be abbreviated as:

[0031]

[0032] At the same time, the airfoil will also receive the thrust of the flowing airflow, which can generally be calculated by the following formula:

[0033]

[0034] C d is the drag coefficie...

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Abstract

The invention discloses a device and method for measuring speed and concentration of dusty airflow. The device comprises a wing-shaped plate, a connecting rod, a first sensor, a second sensor and a shell, wherein one end of the connecting rod is rigidly connected with the wing-shaped plate, the other end of the connecting rod is sequentially connected with the first sensor and the second sensor, the first sensor and the second sensor are torque sensors or tension / pressure sensors, the relative positions of the shell and the pipeline are fixed, and the other sides of the first sensor and the second sensor are connected with the shell; the first sensor and the second sensor are connected with the input end of a computing unit, the output end of the computing unit is connected with an outputmodule; force or torque is used as a measurement signal instead of a differential pressure signal, so that signal distortion or loss caused by the existence of dust is avoided; the connecting structure of the wing-shaped plate and the sensor is not affected by the monitoring direction, and the connecting structure is suitable for both vertically-arranged pipelines and horizontally-arranged pipelines; and compared with a pressure sensor, the torque sensor and the tension and pressure sensor are cheaper and higher in reliability.

Description

technical field [0001] The invention belongs to the field of measuring dust-laden airflow, and in particular relates to a device and method for measuring the speed and concentration of dust-laden airflow. Background technique [0002] Gas-solid two-phase flow is unstable and non-uniform, and the accurate measurement of its velocity and concentration has always been a technical problem in this field. Some scholars have conducted research based on differential pressure method, heat balance method, electrical method, ultrasonic method, etc., but no mature and reliable measurement products have been formed yet. [0003] Realize online and accurate measurement of dust-laden airflow velocity and concentration, grasp the actual parameters of equipment operation, turn the unknown into visibility, and provide effective data support for the monitoring of equipment operating parameters and the optimization and adjustment of refined and intelligent operation. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/00G01M9/06
CPCG01M9/00G01M9/06G01M9/065
Inventor 晋中华牛国平敬小磊徐梦茜
Owner XIAN THERMAL POWER RES INST CO LTD
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