SO3 standard gas generator and SO3 standard gas preparation method

Abstract

The invention discloses an SO3 standard gas generator and an SO3 standard gas preparation method. The SO3 standard gas generator comprises a mixed gas pipeline, a nitrogen gas main pipeline, a water pipeline, an aerosol generator, a heater and a reactor, wherein the mixed gas pipeline is used for conveying sulfur dioxide and nitrogen mixed gas; the nitrogen gas pipeline comprises a first nitrogen branch pipeline and a second nitrogen branch pipeline; one end of the heater is communicated with the second confluence pipeline, and the heater is used for heating gas flowing into the heater and discharging the gas; the other end of the heater is connected with the reactor, and the aerosol generator is connected with the reactor, so that the gas passing through the heater and the aerosol containing the nitrogen and the reaction liquid passing through the aerosol generator react in the reactor to generate the SO3 standard gas. According to the method, the SO3 standard gas with the determined content can be rapidly and stably generated, and the method can be used for providing measurement calibration and metering traceability for an existing gaseous SO3 measuring device and method.

Description

technical field [0001] This application relates to the technical field of air pollutant detection, in particular to a SO 3 Standard gas generator and SO 3 Standard gas preparation method. Background technique [0002] In recent years, with the continuous deepening of research on the control of coal-fired air pollution and the continuous strengthening of control efforts in China, the SO 3 Concerns about pollution have also gradually increased. But limited by SO in the flue gas 3 The lag of accurate detection technology, especially the lack of calibration and measurement traceability methods, there is still a lack of detection of SO in flue gas in China and even in the world. 3 Clear limit indicators and related standards for emissions prevent SO 3 Promote the implementation of emission control policies and measures. [0003] The current mainstream SO 3 Most of the detection methods are based on the traditional controlled condensation sampling method, combined titration...

AI Technical Summary

Problems solved by technology

But thanks to SO 3 Extremely unstable in flue gas, susceptible to adsorption, condensation and high concentrations of SO in the background 2 interference, it is difficult to overcome SO 3 The problems of sampling penetration, background interference and uncertainty evaluation seriously affect SO 3 detection accuracy

Also due to the current stable SO 3 Gaseous standard substance preparation or standard SO 3 The gas generation method is still technically blank, for any form of SO 3 None of the detection methods can carry out effective accuracy verification and measurement calibration, and the lack of calibration and measurement traceability methods hinders the realization of SO in flue gas in the true sense. 3 The main reason for quantitative detection

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