Water vapor generator with periodically-changing pressure
A water vapor generator, periodic change technology, applied in the field of chemical experiments, to achieve good periodicity and repeatability, easy to clean, and easy to maintain
Inactive Publication Date: 2015-05-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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But step-scanning is only suitable for fully reproducible reaction processes, so creating a fully reproducible chemical environment is essential to achieve both hyperspectral and time-resolved
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[0021] See attached figure 1 , a water vapor generator whose pressure changes periodically, which includes: water bath 6, inlet shut-off valve 7, hygrometer 11, pressure control center 8, barometer 12, outlet shut-off valve 9, vacuum pump 10, fine-tuning valve A13 And fine-tuning valve B14; its peripheral equipment is an infrared sample chamber and a spectrum analyzer;
[0022] See attached figure 2 , the infrared sample chamber includes: a sealed box body and a sample pool 3 installed in the sealed box body; the left and right sides of the sealed box body are symmetrically provided with infrared light-permeable windows 5; the sample pool 3 is a columnar structure, and its two The end is sealed by an optical substrate 4 on which aerosol samples are deposited; the optical substrate 4 at both ends of the sample pool 3 is coaxial with the windows 5 on the left and right sides of the sealed box; the spectrum analyzer is connected to the infrared sample chamber ;
[0023] The w...
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The invention belongs to the field of chemical experiments and particularly relates to an air pressure generator. The technical scheme of the water vapor generator with the periodically-changing pressure is as follows: a water bath is connected with one end of an air inlet pipeline; the other end of the air inlet pipeline penetrates through an infrared sample bin and is communicated with a sample cell; one end of an air outlet pipeline is communicated with the sample cell; the other end of the air outlet pipeline penetrates through the infrared sample bin and is connected with a vacuum pump; a barometer is mounted on the air inlet pipeline; a hygrometer is mounted on the air outlet pipeline; an air inlet cut-off valve is arranged on the air inlet pipeline between the barometer and the water bath; an air outlet cut-off valve is arranged on the air outlet pipeline between the hygrometer and the vacuum pump; and a pressure control center is respectively connected with the air inlet cut-off valve, the barometer, the hygrometer and the air outlet cut-off valve. According to the water vapor generator disclosed by the invention, the pressure of water vapor periodically changes and meets the condition of stepped scanning; the number of water molecules generating reaction can be quantitively controlled by controlling the pressure of water vapor; the water molecules react with quantitive aerosol particles; and a strictly-repeated chemical reaction environment is provided.
Description
technical field [0001] The invention belongs to the field of chemical experiments, in particular to a steam generator. Background technique [0002] The important factors of aerosols affecting the atmospheric environment mainly include chemical composition, phase state, and aerosol size due to changes in hygroscopicity; studies have shown that under conditions of high ambient humidity, the size of aerosol particles increases, which will It leads to changes in its light scattering effect; infrared spectroscopy can detect structural information such as the aggregation mode, molecular orientation, and intermolecular interactions of compound molecules, and is a very important means of studying interface chemistry. According to the uncertainty principle, it is difficult for the spectrum obtained by continuous scanning to satisfy high time resolution and spectral resolution at the same time. The step-scan vacuum infrared spectroscopy technology makes up for this deficiency. The s...
Claims
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IPC IPC(8): G01N21/25
Inventor 庞树峰郭郁葱张云冷春波张韫宏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY