Fluorescence reaction detector and sulfur dioxide automatic monitoring device using same

Abstract

The invention discloses a fluorescence reaction detector and a sulfur dioxide automatic monitoring device using the fluorescence reaction detector. The fluorescence reaction detector comprises a xenon lamp light source arranged at one end of a reaction chamber, wherein a biconvex lens, an optical filter, a planoconvex lens and a diaphragm are sequentially arranged between the xenon lamp light source and the reaction chamber, a photomultiplier is arranged on the reaction chamber, and a biconvex lens is arranged between the photomultiplier and the reaction chamber. The sulfur dioxide automatic monitoring device comprises a fluorescence detector, a hydrocarbon removing device, a particle filter, a vacuum pump, a sensor and a data acquisition transmission device, which are arranged in a case; the outlet of the particle filter passes through a three-way valve and is connected with a gas inlet of the fluorescence detector through an inner tube of the hydrocarbon removing device, a gas outlet of the fluorescence detector is connected with an inlet of the vacuum pump after passing through the sensor and an outer tube of the hydrocarbon removing device sequentially, the inlet of the particle filter is connected with a sampling port, and the sensor is electrically connected with the data acquisition transmission device. The fluorescence reaction detector and the sulfur dioxide automatic monitoring device can detect weak fluorescence signals of sulfur dioxide reaction and can accurately measure sulfur dioxide gas concentration value, and the light source has long service life and good stability.

Description

technical field [0001] The invention relates to a detector for detecting weak fluorescent signals and a monitoring device using the detector to monitor the concentration of sulfur dioxide gas in the air, belonging to the technical field of atmospheric monitoring equipment. Background technique [0002] With the rapid growth of the social economy and the continuous improvement of the level of urbanization, the characteristics of ambient air pollution have undergone significant changes. The problem of regional air pollution is becoming more and more serious. Compound air pollution problems such as haze, photochemical smog and acid rain are more prominent, affecting human health. And ecological security, and even the harmonious development of social economy. [0003] SO 2 It is the main pollutant component in the ambient air and an important monitoring item for environmental monitoring stations at all levels to evaluate the urban air environment quality. Among the six standar...

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Problems solved by technology

SO of most manufacturers 2 The working principle of the automatic monitoring instrument is the non-pulse ultraviolet fluorescence method. The ultraviolet lamp used is a zinc lamp. Its light intensity decays quickly, its life is short, the maintenance of the instrument is large, and the price is high; the principle adopted by American THERMO-FISHER is ultraviolet pulse fluorescence. In this method, the ultraviolet lamp adopts a pulsed xenon lamp, and its light source has a long service life, but the optical path part needs to use 4 reflectors, the optical path is complicated, and the cost is high

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