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Non-blocking primary air speed measuring device

A wind speed measurement, non-clogging technology, applied in the direction of measuring device, fluid speed measurement, speed/acceleration/impact measurement, etc., can solve the problem of not being able to fundamentally eliminate clogging

Inactive Publication Date: 2009-03-11
高明逊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-blocking measures are concentrated on the head of the pressure-taking pipe, which cannot fundamentally prevent the occurrence of blockage

Method used

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  • Non-blocking primary air speed measuring device
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown in the non-blocking primary wind speed measuring device, there is an air flow containing pulverized coal flowing in the primary air duct 1 of the power plant. A differential pressure transmitter 4 is installed between the tube 3 and the static pressure tube 6, the range of the differential pressure transmitter is 0-1.6KPa, the power supply is 24VDC, the output is 4-24mA, the full pressure tube 3 and The static pressure take-off pipe 6 is connected to the same stabilized pressure gas tank 5, and a control valve and a throttle valve 8 are installed on the pipeline. 6 flows to the pressure-taking port 2, and the pressure-stabilizing air tank 5 is connected to the instrument wind compressed air source, and the air is stored in the pressure-stabilizing air tank 5 after being stabilized, filtered, and purified. The dynamic pressure value collected by the differential pressure transmitter 4 is transmitted to the data acquisition and processing system...

Embodiment 2

[0024] Such as figure 1 As shown in the non-blocking primary wind speed measuring device, there is a mixed air flow of air and pulverized coal flowing in the primary air duct 1 of the direct blowing system of the newly-built power plant, and the full-pressure pressure-taking pipe 3 and the static pressure-taking pipe 6 are installed on the primary air pipe 1 of the power plant. , a differential pressure transmitter 4 is installed between the full pressure pressure tube 3 and the static pressure tube 6, the range of the differential pressure transmitter is 0-1.6KPa, the power supply is 24VDC, the output is 4-24mA, the full pressure The pressure-taking pipe 3 and the static pressure-taking pipe 6 are connected to the same regulated gas tank 5, and the regulated gas tank 5 provides constant-velocity weak airflow along the full-pressure pressure-taking pipe and the static pressure-taking pipe to the pressure-taking port 2, The dynamic pressure value collected by the differential p...

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Abstract

The present invention relates to the measuring of the quantity of flow or the flow speed, a one-time wind speed measuring device without blockage, a total pressure tube and a static pressure tube. A differential pressure transducer is positioned between the total pressure tube and the static pressure tube, and small air flows in the total pressure tube and the static pressure tube in the direction of the pressure obtaining port. The small air flow can resist the diffusing of the coal powder in to the pressure tube. The present invention which is not in a traditional thinking mode solves the problems of blocking skillfully and assures that the pneumatics property of the pressure obtaining elements is not changed and improves the measuring precision. The method for measuring in the present invention brings convenient for users without on-the-spot demarcating and debugging. The device and method having no requirement of dust concentration in the present can be used for measuring a direct-flowing system or sending powder to replace the air and can also be used in other occasions of higher dust concentration.

Description

Technical field: [0001] The invention relates to the field of flow velocity or flow measurement, in particular to a dust-laden air flow measurement device. Background technique: [0002] The importance of primary wind speed measurement for power plant boilers has been widely recognized. It is an indispensable and important parameter for boiler combustion adjustment, and it has important significance for combustion stability, economy and reliability. However, its measurement has always been a problem. Originally, the static pressure was used to monitor the primary wind. In recent years, it is more scientific and reasonable to directly measure the primary wind speed. The existing devices for directly measuring the wind speed are as follows: [0003] It is directly measured with ordinary dynamic pressure taking components and differential pressure transmitters, and it turns out that this method cannot be applied to dusty primary air. [0004] The total pressure is taken throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/00G01P1/00G01F1/00G01F15/00
Inventor 高明逊
Owner 高明逊
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