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Hydrogen sulfide gas concentration detection device and detection method based on ultraviolet catalytic conversion

A technology for gas concentration detection and catalytic conversion, which is used in the measurement of color/spectral characteristics and the preparation of samples for testing.

Inactive Publication Date: 2019-03-19
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In summary, hydrogen sulfide will cause serious harm to the environment and industrial equipment

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  • Hydrogen sulfide gas concentration detection device and detection method based on ultraviolet catalytic conversion
  • Hydrogen sulfide gas concentration detection device and detection method based on ultraviolet catalytic conversion
  • Hydrogen sulfide gas concentration detection device and detection method based on ultraviolet catalytic conversion

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[0092] The standard concentration is 49.8ppm H 2 S is introduced into the sample cell at a flow rate of 1L / min. After about 2 minutes, close the inlet and outlet valves. O 2 Inject the sample cell through the balloon to promote H 2 S to SO 2 The data is saved every 0.25min. Optical fiber spectrometer obtains noise-containing spectral signals such as figure 2 Shown. Perform denoising processing on the noisy spectra to get the denoising absorption spectra as image 3 Shown. Now we choose to process the absorption spectra after denoising at three obvious times: 0.5min, 3.5min, and 7.5min. According to formulas 4 and 5, the absorption spectrum after denoising and removing the background spectrum can be obtained as Figure 4 As shown in (a), the absorption spectrum of the light parameter value is obtained as Figure 4 (b) Shown. According to Equation 6, the sulfur dioxide concentration values ​​at different times are shown in Figure 5. Can find SO 2 The concentration changed fr...

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Abstract

The invention provides a hydrogen sulfide gas concentration detection device which comprises a deuterium lamp, a first quartz lens, a sample pond, electromagnetic valves, a flowmeter, an air pump, a second quartz lens, an oxygen storage tank, a hydrogen sulfide storage tank, a barometer, an optical fiber, a spectrograph and a computer. The deuterium lamp is taken as a light source. Rays sent by the deuterium lamp pass through the coaxial first quartz lens. The sample pond is arranged between the first quartz lens and the second quartz lens. The electromagnetic valves are arranged at inlets / outlets of the sample pond. An air outlet is formed in the tail end of the sample pond. The air outlet is connected to a container filled with a strong alkali solution. A light barrier is arranged on thetail part of the sample pond. The barometer is also connected. The optical fiber is arranged on the other side of the second quartz lens, the optical fiber is connected to the spectrograph, the dataoutput of the spectrograph is connected to the computer, the hydrogen sulfide storage tank is connected to the air inlet of the sample pond through the first flowmeter and the electromagnetic valves and the oxygen storage tank is connected to the air inlet of the sample pond through the second flowmeter, the air pump and the oxygen inlet electromagnetic valves.

Description

Technical field [0001] The invention relates to the field of gas concentration detection, in particular to a hydrogen sulfide gas concentration detection device based on ultraviolet photocatalytic conversion and a detection method thereof. Background technique [0002] H 2 S is generally used as a product of certain chemical reactions and natural protein decomposition processes, as well as components and impurities of certain natural products, and often exists in a variety of production processes and in nature. Such as mining and non-ferrous metal smelting. Low-temperature coking of coal, containing Hydrogen sulfide is produced in the mining and refining of sulfur oil, rubber, tanning, dyes, sugar and other industries. Excavation and remediation of swamps, ditches, printing and dyeing, sewers, tunnels, and removal of garbage and feces, as well as natural gas, Hydrogen sulfide is often present in volcanic jets and mineral springs. [0003] H 2 S is corrosive, and it accumulates on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N1/28
CPCG01N1/28G01N21/33
Inventor 张云刚刘云杰王永达刘黄韬张文平
Owner YANSHAN UNIV
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