Device and method for continuously monitoring concentration of SO3

Abstract

The invention provides a device and a method for continuously monitoring the concentration of SO3. The device for continuously monitoring the concentration of SO3 comprises a collection unit, an SO2 test unit, an SO3 test unit and an analysis unit. The collection unit is used for collecting gas, the SO2 test unit is in communication with the collection unit, the SO2 test unit is used for testing the concentration of SO2 in gas, the SO3 test unit comprises a plurality of absorption units and a sulfate ion test unit, a switch is arranged between one end of each absorption unit and the collectionunit to control the communication between the absorption units and the collection unit, the other end of each absorption unit is in communication with the sulfate ion test unit, and the absorption units are used for absorbing SO2 and SO3 in the gas and converting SO2 and SO3 into sulfate ions. The method for continuously monitoring the concentration of SO3 comprises the steps of switching, collection, concentration test of SO2, concentration test of sulfate ions, analysis, and continuous test.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a continuous monitoring SO 3 Concentration devices and methods thereof. Background technique [0002] With my country's increasingly stringent environmental protection policies and the gradual deepening of ultra-low emission transformation work, various unconventional pollutants (PM2.5, SO 3 , mercury and its compounds and VOC S etc.) emission limits have also been put on the agenda, and some areas have begun to limit SO 3 emissions. SO emissions from coal-fired power plants 3 It mainly comes from two aspects: on the one hand, about 0.5% to 1.5% of sulfur will be oxidized into SO in the process of burning coal 3 ; On the other hand, in the SCR denitrification process, about 1% of SO in the flue gas will be decomposed under the action of the catalyst 2 converted to SO 3 . SO 3 Emissions have adverse effects on the stable operation of subsequent equipment and...

AI Technical Summary

Problems solved by technology

SO 3 Emissions have adverse effects on the stable operation of subsequent equipment and air pollution control

Moreover, since the current national environmental protection standards do not 3 Therefore, domestic thermal power plants have not yet controlled SO in flue gas 3 The concentration is monitored online, and there are no mature related equipment products for the market. The relevant tests are all based on the current domestic and foreign standards and the method of manual sampling and analysis

[0003] Also, for SO 3 In the development of concentration monitoring technology, scientific and technological workers mainly focus on the SO at the outlet of the SCR denitrification device. 3 Concentration test on, although the chimney outlet SO 3 Concentration monitoring is also the focus of attention, but the test method still follows the existing domestic and foreign standards. Although the current standard method can carry out SO 3 Monitoring, but the operation is cumbersome, the error is large, and the reliability of the device is poor

Images