Multi-channel multi-component stationary source sampling and analysis system

Abstract

The invention discloses a multi-channel multi-component stationary source sampling and analysis system. A sampling gun is connected to a particulate cutting head; the particulate cutting head is connected with an MPS (Modified Polystyrene) dilution system; the MPS dilution system is connected with an air compressor; a pneumatic connector of the MPS dilution system is connected to gas inlets of two gas distributing pipes; a gas emptying port with a one-way valve is formed in the tail end of each gas distributing pipe; equivalent sampling ports are formed in a main body of each gas distributing pipe; the equivalent sampling ports are connected with a gas concentration sensor, a VOCs ((Volatile Organic Compounds) sampling stand, an on-line particulate detector and particulate double membrane sampling devices; flue gas is guided into a cutter behind the particulate cutting head by the flue gas sampling gun; particle components other than target particulates are removed and then enter the MPS dilution system through an MPS warm air guide hose; the diluted gas enters the gas distributing pipes and then is subjected to sampling or on-line analysis through the equivalent sampling ports; each sampling or analysis instrument is provided with a power system; and the redundant diluted gas is discharged to an atmosphere by the gas emptying ports.

Description

technical field [0001] The invention relates to an instrument for pollutant discharge analysis, in particular to a multi-channel multi-component fixed source sampling and analysis system. Background technique [0002] Stationary sources are one of the important sources of air pollutants, and their exhaust gas contains a variety of gaseous and particulate pollutants. Pollutants emitted by pollution sources have complex interactions, and there are secondary reactions and transformations under certain conditions. Therefore, the analysis of source emission characteristics using a single pollutant has certain limitations. In order to explore the emission rules of pollution sources and further analyze the emission characteristics of sources, it is necessary to sample and analyze various pollutants such as gaseous and particulate states. [0003] A variety of instruments are available for the analysis of emissions from stationary sources. The flue gas analyzer can only complete t...

AI Technical Summary

Problems solved by technology

Stationary source flue gas online monitoring system (CEM) can realize continuous online monitoring of nitrogen oxides, sulfur oxides and particulate matter, but the analysis of flue gas components is less, and its time resolution is generally 1 minute, which cannot provide higher resolution data

[0004] The current stationary source monitoring and analysis instruments mainly have the following deficiencies: 1. There are not enough detectable pollutant components

2. Unable to analyze VOCs and other emission components that are likely to cause secondary pollution

3. When multiple testing instruments are used to expand the detection range of pollutants, it is impossible to comprehensively compare the data obtained by each instrument due to the different spatial positions of multiple air inlets and the differences in analysis time.

4. For particulate matter, only the data of emission concentration can be obtained, and its physical and chemical characteristics cannot be analyzed

5. The time resolution of the acquired data is not high enough, and it is difficult to analyze the trend of pollutant discharge in a short period of time

6. It is difficult to directly measure the flue gas composition in the flue gas, and it is difficult to reflect the actual emission after the flue gas is in contact with the air, and the pollutant emission changes due to the secondary reaction

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