A method for online monitoring of odor concentration

Abstract

The invention relates to the technical field of on-line monitoring, and discloses an on-line monitoring method of odor concentration, comprising: the gas sample directly enters an online mass spectrometer without going through a pretreatment system such as a chromatographic column, and performs a full scan in the range of a mass-to-charge ratio of 1 to 200 m / z Analyze and obtain mass spectrometry data, and simultaneously use manual monitoring methods to obtain odor concentration; repeat the above steps to establish a database of mass spectrometry data-odor concentration; build an odor monitoring model, and divide the data samples in the database into training sets and test sets. The monitoring model is trained, the characteristic vector of the mass spectrometry data is used as the input, and the corresponding odor concentration is output; the gas to be measured is scanned and analyzed to obtain the mass spectrometry data, which is input to the trained odor monitoring model to obtain the corresponding odor concentration. The online monitoring method for odor concentration of the present invention has accurate and reliable monitoring results, high monitoring efficiency, reliable system operation, simple and convenient maintenance, and wide applicability, and can be generally applied to various industrial source odor concentration monitoring occasions.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring, in particular to an on-line monitoring method of odor concentration. Background technique [0002] Odor pollution has become one of the focuses and urgent problems to be solved by governments at all levels and society because of the mental and physical harm it causes to the human body. There are more than 4,000 pollutants that can cause odor pollution. According to their chemical properties, they can be divided into inorganic odor pollutants and organic volatile odor pollutants. The former such as hydrogen sulfide, carbon disulfide, ammonia, etc., the latter such as Volatile organic pollutants such as trimethylamine, styrene, and benzene. Odor pollution sources mainly include domestic sources and industrial sources. Among them, the odor pollution caused by industrial sources, especially chemical industry parks, has a large range of influence, many pollution sources, and the discharge ...

AI Technical Summary

Problems solved by technology

Judging from the pilot situation, the electronic nose method cannot be applied to fine chemical industries such as dyes, pharmaceutical intermediates, and pesticides. The interference of a variety of gases with different properties on the electronic nose sensor array, coupled with the low smell threshold of many pollutants, lead to a series of problems such as distortion of the response spectrum of the electronic nose method, and the inapplicability of the set pattern recognition algorithm.

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