A kind of online monitoring method of sulfur dioxide
A technology of sulfur dioxide and sensors, applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problems of unsatisfactory detection speed and quality, and achieve the goal of overcoming the slow analysis speed, improving accuracy and improving effect Effect
Active Publication Date: 2017-05-03
成都海兰天澄科技股份有限公司
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[0006] However, in places with high security requirements, the detection speed and quality of the above methods are not satisfactory
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[0022] A method for online monitoring of sulfur dioxide, comprising the steps of:
[0023] (1) Use the 3SF / F sulfur dioxide sensor of the British CITY company to detect the gas to be measured;
[0024] (2) If sulfur dioxide is detected, a message prompt is given, otherwise distilled water is obtained; according to the output signal of the sulfur dioxide sensor, it is judged whether it exceeds a predetermined threshold; if it exceeds, an alarm message is started; otherwise, nitrogen is used to pass through the sulfur dioxide sensor for cleaning.
[0025] (3) import the sample gas to be tested;
[0026] (4) In an environment of 200 degrees Celsius, the distilled water and the sample gas to be tested are mixed according to a volume ratio of 1:2 to obtain a mixed gas; after testing, under this ratio, the ionized ions of the distilled water vapor are easy to change in temperature. Photochemical reaction with sulfur dioxide under sufficient conditions.
[0027] (5) The temperature...
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The invention provides a sulfur dioxide online monitoring method. The sulfur dioxide online monitoring method aims at improving the detection speed and efficiency of sulfur dioxide. The method comprises the following steps that (1), a sulfur dioxide sensor is used for detecting gas to be tested; (2), if sulfur dioxide is detected out, information is given out for prompt, otherwise distilled water is obtained; (3), sample gas to be tested is led in; (4), the distilled water and the sample gas to be tested are mixed at the proportion with volume ration of 1:2 under the environment of 200 DEG C to obtain mixed gas; (5), the temperature of the mixed gas is decreased to 150 DEG C in a water bath mode, and ionization is carried out by utilization of the ultraviolet source; (6), the temperature of the mixed gas is decreased to 100 DEG C in a water bath mode, and ionization is carried out on the mixed gas by utilization of the photoelectric effect; (7), ion mobility spectrometry detection is carried out. The sulfur dioxide online monitoring method overcomes the defect that the analysis speed is too low by generally adopting a spectrum and the like in the prior art and improves the mobility spectrometry detection precision and the ionization effect.
Description
technical field [0001] The invention relates to the technical field of air quality detection, in particular to an online monitoring method for sulfur dioxide. Background technique [0002] SO2 is the most important sulfur-containing pollutant in the air, and it is a pungent and suffocating colorless gas. SO2 is largely a variety of trace species produced by human activities. These trace species are subjected to physical, chemical and biological effects and participate in geochemical cycles, which have a major impact on the global atmospheric environment and ecology, such as Chemical smog, acid rain, the greenhouse effect and the destruction of the ozone layer are all related to the aforementioned trace gases. SO2 is also a participant in the photochemical reactions that form modern "smog". Long-term inhalation of SO2 will cause chronic poisoning, which not only aggravates respiratory diseases, but also harms the liver, kidneys, and heart. SO2 in the atmosphere is easily o...
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IPC IPC(8): G01N21/17G01N27/64
Inventor 王和平李钇谭宇洋申创
Owner 成都海兰天澄科技股份有限公司