Primary wind speed leveling and automatic measuring device

Abstract

The invention provides a primary wind speed leveling and automatic measuring device. The device comprises a flue, a pitot tube, a tubular linear motor, an automatic controller and a differential pressure transmitter. According to the primary wind speed leveling and automatic measuring device, the primary wind speed can be automatically and accurately measured, and the workload is greatly reduced.The human error is reduced and the test work can be completed by one person. The work intensity of the test personnel is greatly reduced. An additional positioning ruler is not needed, and the automatic positioning of the pitot tube is achieved through a built-in positioning device of the tubular linear motor. The positioning precision is high, and the human error caused during the measurement ofa handheld ruler is avoided. The measurement accuracy is improved. The wind speed of each primary wind pipe of the same-layer combustor can be measured at the same time, and the measurement time is greatly shortened. The automatic data recording, the wireless data transmission and the control of the primary wind speed leveling test can be realized. The real-time adjustment of the test working condition can be realized.

Description

technical field [0001] The invention relates to the field of wind speed leveling of a primary air duct at the outlet of a coal mill, in particular to an automatic measuring device for leveling the primary wind speed. Background technique [0002] In order to ensure the safe and stable operation of the power plant boiler, before the boiler is ignited, the wind speed leveling test of the primary air duct at the outlet of the coal mill (referred to as primary air leveling) test is required to ensure that the wind speed deviation of each primary air duct at the outlet of the coal mill is within ±5 %, so that the boiler furnace has good aerodynamic conditions during operation. [0003] At present, the conventional primary air leveling process is: before measuring, the scale is made by using the "logarithmic-linear" method according to the section size of the primary air duct. When measuring, one person lifts the ruler horizontally along the measurement direction, and the other p...

AI Technical Summary

Problems solved by technology

[0005] 1. The measurement of each primary air duct requires the cooperation of three people, and the location of the on-site measurement point may be high or low, the operating space is also very narrow, the measurement is inconvenient, and the workload of the measurement personnel is heavy

[0006] 2. In the process of wind speed measurement, it is necessary to hold the ruler and manually pull the pitot tube to locate the measuring point, and the human error is relatively large

[0007] 3. It is impossible to measure the primary air ducts corresponding to the burners on the same floor at the same time. Taking the four primary air ducts corresponding to the burners on the same floor as an example, if the simultaneous measurement is realized, 12 people are required to measure at the same time, which is difficult to achieve in actual work

In the actual measurement, the measurement is often divided into 1-2 groups. During the measurement process, the Pitot tube needs to be inserted and removed repeatedly, and the measurement time is too long.

[0008] 4. After each measurement is completed, it is necessary to manually enter the measurement data, perform calculations, and then adjust according to the calculation results, which also consumes a lot of time

Due to the high noise at the test site and the frequent communication failures of the walkie-talkie, the information transmission was not timely and the test time was prolonged

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