Measuring device for wind speed and wind volume

Abstract

The invention relates to a measuring device for the wind speed and the wind volume. The measuring device comprises an airflow passage, an air inlet is formed in one end of the airflow passage, an air outlet is formed in the other end of the airflow passage, other sides of the airflow passage are sealed, a rectification grid is mounted at the air outlet, pitot tubes are uniformly distributed in the airflow passage, total pressure ends of the pitot tubes are respectively connected with pitot tube total pressure manifolds; static pressure ends of the pitot tubes are connected with pitot tube static pressure manifolds, one end of each pitot tube total pressure manifold penetrates the airflow passage, and is respectively connected with the corresponding total pressure manifold, and one end of each pitot tube static pressure manifold penetrates the airflow passage, and is respectively connected with a corresponding static pressure manifold. The measuring device can be mounted in front of an air flue connected with secondary air nozzles inside a large secondary air bellow of a pulverized coal fired boiler, so that the defect that the large air bellow structure has no straight tube to mount the air speed measuring device is overcome, the secondary air airflow rectification can be realized, the airflow direction in front of a measured original part is stable, and the pitot tubes are connected in parallel to realize multi-point measurement, and the measurement is accurate.

Description

technical field [0001] The invention relates to a wind speed and volume measuring device. Background technique [0002] The combustion adjustment of pulverized coal boilers in thermal power plants mainly depends on adjusting the opening of the small dampers of each secondary air to change the wind speed of the secondary air nozzles. Stable, the test conditions for wind speed and air volume are not good, the test accuracy is poor, and it cannot meet the needs of guiding operation adjustments. Refined combustion adjustment is beneficial to reduce boiler NO X Emissions and prevention of boiler coking are very important to today's strict environmental protection requirements. Accurate and reliable air velocity measurement is a must for fine combustion tuning. [0003] The differential pressure flowmeter is a commonly used wind speed measurement device, but the current differential pressure flow device is installed on the field equipment because there is no long straight pipe ...

AI Technical Summary

Problems solved by technology

[0003] The differential pressure flowmeter is a commonly used wind speed measurement device, but the current differential pressure flow device is installed on the field equipment because there is no long straight pipe section to test the airflow direction of the original part and the measurement original part is not perpendicular, and the resistance of the test device itself Large and other problems, resulting in inaccurate tests

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