A compressed air pressure dew point online detection device and its calculation method

Abstract

The present invention is an on-line detection device for compressed air pressure dew point, which is characterized in that it includes a temperature and humidity sensor for on-site data collection, a pressure sensor, a pressure data processing module, a DC power supply, a main chip, and a liquid crystal display; the main chip It includes that the processor is electrically connected to the acquisition chip, the acquisition chip is electrically connected to the transformer, the temperature and humidity sensor is electrically connected to the processor of the main chip, the processor is electrically connected to the liquid crystal display screen, and the pressure sensor is electrically connected to the main chip. The acquisition chip of the chip is electrically connected, and the DC power supply is electrically connected to the pressure sensor and the transformer respectively, and the transformer is electrically connected to the liquid crystal display. And provide its calculation method. The device has the advantages of simple structure, low cost, good implementability, long-term uninterrupted work, strong independence and stability for each measurement, short measurement cycle, and high work efficiency; the method is scientific and reasonable, strong applicability, and high accuracy.

Description

technical field [0001] The present invention relates to pressure dew point on-line detection technology, in particular to a compressed air pressure dew point on-line detection device and its calculation method. Background technique [0002] Whether in the atmosphere or in the pipeline, the air always contains a small amount of water molecules. The dew point temperature is an index to reflect the dryness of the air, and its value is equal to the saturation temperature corresponding to the partial pressure of water vapor in the air. When the temperature of the air is equal to the dew point temperature, the water vapor in the air is in a saturated state, and if the air temperature drops further, the water in the air will condense out in the form of liquid. Since the dew point temperature can intuitively reflect the temperature at which moisture in the air condenses, the dew point temperature is the most commonly used parameter in the industry to indicate the degree of air dryn...

AI Technical Summary

Problems solved by technology

[0003] The water content of compressed air for instrumentation is an important criterion affecting the performance of industrial pneumatic control and instrumentation. When the ambient temperature is low, the water vapor will liquefy, and the high water content will cause the compressed air of the instrument to atomize or even freeze, which is easy to Blocking the power or control air source of pneumatic control devices and instruments will endanger production safety

Especially in the power industry where pneumatic actuators are widely used, if the water content of the compressed air used for instrumentation exceeds the standard (especially in low temperature environments), it is very likely to cause abnormal shutdown events of the unit

The industry often encounters the problem of converting the normal pressure dew point and pressure dew point of humid air with a certain moisture content, but so far there is no effective measuring instrument that directly displays the dew point temperature under the current temperature, humidity and pressure

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