A pollution source condensable particulate matter sampling device and sampling method

Abstract

The invention discloses a pollution source coagulable particulate matter sampling device and method in the field of pollution source monitoring. A particulate matter classification device is placed ina fixed pollution source flue and is connected with each of an air distribution plate in a dilution cavity and a filterable particulate matter collection device through flue gas pipelines; a diluentair supply device, a diluent air organic matter and water vapor removal device, a diluent air particulate matter filtering device, a diluent air flow meter and a diluent air inlet of the dilution cavity are connected in sequence through a pipeline; a fist mixed gas outlet of the dilution cavity, a bypass gas particulate matter filtering device, a bypass gas flow meter and a bypass gas extraction device are connected in sequence through a pipeline; and a second mixed gas outlet of the dilution cavity, a total particulate matter collection device, a total particulate matter flow meter and a total particulate matter air extractor are connected in sequence through a pipeline. According to a measurement method provided by the invention, the particulate matter and total particulate matters can be collected at the same time, and then a difference value is calculated to obtain the coagulable particulate matters.

Description

technical field [0001] The invention belongs to the technical field of testing, and specifically relates to a sampling device and a sampling method for condensable particulate matter of pollution sources. Background technique [0002] The particulate matter emitted by stationary pollution sources not only includes filterable particulate matter that exists in the flue as liquid or solid particles, but also includes condensable particulate matter that is gaseous at the temperature of the flue and condenses into solid or liquid particles within a short time after being discharged from the flue into the atmosphere. particulates. [0003] At present, the sampling device and method of condensable particulate matter from fixed pollution sources that are more widely used are the standard method of the U.S. Environmental Protection Agency (device 202 of the U.S. Environmental Protection Agency method), in the United States Environmental Protection Agency (U.S.EPA). Method 202-Dry imp...

AI Technical Summary

Problems solved by technology

The sum of the two is the concentration of condensable particulate matter. The disadvantage of the method is that water vapor is also condensed out during the process of flue gas condensation and cooling, and some SO soluble in water in the flue gas 2 gases, soluble in condensed water, thus giving a positive bias to accurate measurements of condensable particulate matter

There are two cyclones in the unit to remove specific particulate matter from the flue gas, which will cause measurement errors

On the one hand, the cutting points of the two cyclone cutters cannot be exactly the same, resulting in different classified particles

The flue gas flow rate of the two channels cannot be exactly the same, which will also cause the cutting point of the cyclone cutter to be different, resulting in measurement errors; on the other hand, the two cyclone classifiers need to be heated and kept warm, and at the same time increase the complexity of the sampling system, thus affecting the sampling System Portability

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