Sampling device for SO3 in stationary pollution source flue gas

Abstract

The invention provides a sampling device for SO3 in stationary pollution source flue gas. The sampling device comprises a front-section smoke gun, a rear-section smoke gun, a sampling main machine, a sampling head, a front-section smoke gun heater, a rear-section smoke gun heater, an air cooling device, a pitot tube, an air inlet smoke temperature sensor, a quartz filter, a quartz glass lining tube, a quartz condensation tube and a condensation tube outlet smoke temperature sensor. According to the invention, all the components are modularized, so that on-site connection / disassembly is simpler and more convenient, and carrying is convenient; when the SO3 emission concentration is accurately tested, the number of equipment carried during on-site monitoring is reduced, and the complexity of on-site instrument connection and chemical reagent configuration and recovery operation is reduced, so that the sampling efficiency is improved; and flue gas sampling under different temperature conditions is realized. According to the invention, the filterable particulate matters are captured at the foremost end of the sampling device in a manner of preposing the quartz filter, the smoke gun does not need to be cleaned, and only the sampling nozzle needs to be cleaned, so that the cleaning operation after sampling is simplified.

Description

technical field [0001] This invention belongs to SO 3 Pollutant sampling and monitoring technical field, especially related to a kind of SO in the flue gas of fixed pollution source 3 sampling device. Background technique [0002] SO 3 It is an unconventional pollutant in the flue gas emitted by stationary sources. It usually exists in the flue gas of stationary pollution sources in the form of aerosols and is extremely difficult to remove. [0003] In my country, SO in flue gas emitted from stationary sources 2 Remarkable achievements have been made in emission control, but for SO 3 Governance and removal are still in their infancy. SO 3 It will increase the acid dew point of flue gas, cause blue smoke plume, corrode equipment, and SO 3 than SO 2 The toxicity of SO is more than ten times higher than that of SO 3 Exists mostly in the form of aerosols in flue gas and the atmosphere, is one of the main pollutants causing environmental acidification, and is an importan...

AI Technical Summary

Problems solved by technology

[0006] First, in the controlled condensation method, the particle filter membrane is placed behind the sampling gun and outside the flue, which belongs to the external filtration method. This method will cause a large amount of particles to adhere to the sampling gun, and it is very difficult to clean after sampling; the isopropanol absorption method Because it is suitable for sulfuric acid industrial exhaust gas, no filter membrane is required, so it is not suitable for dusty flue gas

[0007] Second, the degree of equipment integration is low and the portability is insufficient

Whether it is DL / T 1990-2019, GB / T38685-2020, EPA8 or EPA8A, it is necessary to carry multiple absorption bottles for sampling, and there are many connecting pipelines between components, and it is necessary to carry an ice bath or temperature-controlled water bath , equipped with ice water or hot water, especially the imported equipment produced according to the EPA8 or EPA8A standard is bulky and heavy, and usually the flue gas outlets of enterprises are located at a higher position, which causes inconvenience in on-site transportation and long time for instrument preparation

[0008] Third, on-site operations are cumbersome

low efficiency

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