Chimney exhaust gas fine powder continuous automatic measuring device

Abstract

The present invention relates to a method for sampling particulate matter contained in stack gas and, more particularly, to a continuous isokinetic sampling device for stack gas having a suction nozzle to which a sectional area control device is attached, and an automatic continuous measurement system for fine dust in stack gas comprising the same combined therewith, wherein: in order to suction asample at the same rate as the flow rate of stack gas in a stack gas emission source, the sectional area of a suction nozzle is automatically controlled so as to suction a sample at the same rate asthe flow rate in the emission source, whereby measurement errors due to the inertial force of particulate matter are eliminated; and particulate matter is introduced into a cascade impactor at a constant flow rate of suction gas of 16.67 l / min so as to continuously separate the particulate matter into particulate matter less than 10 [mu]m (PM10) and particulate matter less than 2.5 [mu]m (PM2.5) and automatically measure the PM10 and the PM2.5. The present invention can satisfy both conditions for a sampling device and a cascade impactor for particulate matter in stack gas, which are in conflict with each other, and thus can perform both sampling and automatic continuous measurement of particulate matter in stack gas while minimizing measurement errors.

Description

technical field [0001] The invention relates to an exhaust gas continuous constant-velocity sampling device provided with a cross-sectional area adjustment device on the suction nozzle, and relates to a device for controlling and adjusting the proportion of the cross-sectional area of ​​the suction nozzle based on the exhaust gas flow rate at the front end of the sample sampling pipe to detect the exhaust gas flow rate to maintain Continuous constant-velocity sampling device for exhaust gas with a cross-sectional area adjustment device on the suction nozzle that is inhaled at the same speed as the detected flow rate. Background technique [0002] So far, total suspended particulate matter (Total suspended particles) has been detected. However, as the importance of dust increases, it is necessary to separate it into PM10nm and below for continuous detection, and this importance has attracted attention. [0003] Generally, dust detection in the atmosphere or indoor environment...

AI Technical Summary

Problems solved by technology

[0009] To sort it out, if you want to sample suspended particulate matter without detection error through a fixed nozzle area, you need to "change" the sampling in proportion to each change in exhaust flow rate, however, in order to continuously separate the sampled suspended particulate matter For automatic detection of PM10 (suspended particles less than 10 μm) and PM2.5 (suspended particles less than 2.5 μm), it is necessary to flow the suspended particles into the particle separation device at a "fixed speed" of 16.67l / min, so it is contradictory difficult to detect

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