Water steam correcting absorptive pool based on saturated steam pressure

Abstract

The invention discloses a water vapor calibration absorption pool based on saturated vapor pressure, which is characterized in that it includes a constant temperature water bath, a thermometer, a U-shaped equipotential meter, and a round bottle are placed in the constant temperature water bath, and the round bottle 1. One end of the U-shaped equipotential meter is connected to the stainless steel cylinder. There is a conduit on the stainless steel cylinder connected to the vacuum pump through the two-way piston. The other end of the U-shaped equipotential meter is connected to a conduit. It is divided into two circuits, one of which is connected to the pressure gauge, and the other is connected to the air pump through the three-way piston; there are symmetrical transparent windows at both ends of the stainless steel cylinder, and the outlets of nitrogen pipes are installed on the outside of the transparent windows. The measurement range is between -101.30kPa-101.30kPa, and the temperature control accuracy is ±0.05°C. It is a simple, convenient and cheap laboratory instrument.

Description

technical field [0001] The invention belongs to a gas calibration instrument, in particular to a heatable water vapor calibration absorption pool based on saturated vapor pressure. Background technique [0002] As one of the main products of hydrocarbon combustion, H 2 The emission of O is an important indicator of combustion efficiency, and the emission of H in the combustion process 2 Continuous online monitoring of O concentration is an effective means to achieve effective control of the combustion process and timely adjustment of fuel input, thereby improving combustion efficiency and saving energy. At the same time, in order to achieve effective control of the combustion process, many related industrial productions need to control the H in the combustion process. 2 O.CO 2 Real-time measurement of emissions, which limits the application of traditional sampling-based gas detection methods such as gas chromatography, wet chemical methods, etc., because the extraction me...

AI Technical Summary

Problems solved by technology

Direct absorption spectroscopy is a gas measurement method that does not require calibration, but it is easily affected by background noise and the detection sensitivity is very low. In order to improve the detection sensitivity, the method of wavelength modulation is generally used. This method must be performed at a known temperature. Calibrate the gas with known concentration, but it is very difficult to obtain water vapor with known concentration and temperature in reality, so the method based on saturated vapor pressure is used to measure H 2 O Calibration is a feasible and effective method

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