Test device for sulfur trioxide and condensable particulate matters discharged from fixed pollution source and method

Abstract

The invention relates to a test device for sulfur trioxide and condensable particulate matters discharged from a fixed pollution source and method. The device comprises a high temperature sampling probe, a selective condensation system, a constant temperature condensation system and a sampling control system. The flue gas is collected by constant velocity sampling. According to the flow rate of aflue gas sampling point, a pitot tube parallel method is used to collect the flue gas at a constant velocity. A fully automatic sampler has the functions of automatically collecting flue gas pressure,automatic constant velocity sampling and metering sampling flow, and automatically stopping sampling when an alarm signal is found out. After the sampling is completed, an actual sampling volume andthe dry flue gas sampling volume data of a standard condition are provided. Compared with the prior art, the device and the method disclosed in the invention can simultaneously measure the sulfur trioxide / sulfuric acid mist and condensable particulate matters discharged from a fixed source, quantitatively analyze organic components and inorganic components in the condensable particulate matters, quantitatively analyze the ratio of sulfur trioxide / sulfuric acid mist in the condensable particulate matters and quantitatively analyze the concentrations and the ratios of various ions in the inorganic components.

Description

technical field [0001] The invention relates to a sampling device and method, in particular to a device and method for simultaneously measuring sulfur trioxide / sulfuric acid mist and condensable particulate matter discharged from a stationary source. Background technique [0002] At present, the monitoring of particulate matter emissions from stationary pollution sources in China only tests particulate matter that exists in solid or liquid form, which can filter particulate matter (smoke). Some pollutants in the flue gas (sulfur trioxide, ammonium salt, nitrate, volatile organic compounds, heavy metals, etc.) exist in the flue gas, aerosol or steam, and cannot be captured by filter cartridges or membranes; but When this part of pollutants leaves the chimney and is discharged into the atmosphere, due to factors such as ambient temperature drop and pressure change, it will quickly condense into a solid or liquid state, forming very small particles, which can be condensed parti...

AI Technical Summary

Problems solved by technology

In view of the fact that sulfur trioxide / sulfuric acid mist accounts for a relatively heavy proportion of condensable particulate matter, and the separate sampling of sulfur trioxide / sulfuric acid mist and condensable particulate matter takes a long time, and the flue gas conditions on site are constantly changing, resulting in poor sampling repeatability. Lack of devices and methods for simultaneous sampling of sulfur trioxide and condensable particulate matter emitted from stationary sources

[0005] The existing condensable particulate matter sampling device generally filters the filterable particulate matter in the flue gas first, then condenses the condensable particulate matter in the flue gas, then captures the condensable particulate matter through the filter membrane, and finally weighs the condensable particulate matter after drying through the filter membrane However, this device cannot distinguish the content of organic and inorganic components in condensable particulate matter, especially the proportion of sulfur trioxide / sulfuric acid mist and the proportion of various soluble salts in condensable particulate matter cannot be determined. ratio, cannot provide sufficient technical support for inferring the source of condensable particulate matter

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