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A pm2.5 source apportionment sampling device based on flow feedback control

A technology of feedback control and sampling device, which is applied in the direction of sampling device, etc., can solve the problems of single flue gas sampling method and inability to accurately control the dilution ratio, and achieve the effects of easy promotion, reduced manufacturing difficulty, and stable flow

Active Publication Date: 2017-12-05
NANJING ASSEN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art that the flue gas sampling method is single and the dilution ratio cannot be precisely controlled, thereby simulating the real state of particulate matter emitted from pollution sources in the atmosphere, the present invention provides a PM2.5 source analysis sampling based on flow feedback control device, which enables accurate sampling and simulation of particle aging

Method used

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  • A pm2.5 source apportionment sampling device based on flow feedback control

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Embodiment 1

[0024] Such as figure 1 As shown, the PM2.5 source apportionment sampling device based on flow feedback control in this embodiment includes a flue gas collection component, a mixing and dwelling chamber, a PM cutter 19, and a sampling and analysis unit.

[0025] The flue gas collection component is a unit for collecting flue gas, which is directly installed in the pipeline of the pollution source to collect the flue gas in the pipeline; the mixing and dwelling chamber is the area where the flue gas and the dilution gas are mixed and lodged, specifically including the dilution tank 7 and the dwelling chamber 8. The dilution tank 7 and the residence chamber 8 are connected to each other, the flue gas collection component is connected to the dilution tank 7, and the residence chamber 8 is connected to the sampling and analysis unit through the PM cutter 19.

[0026] In this embodiment, a second flowmeter 6 and an air delivery unit are also included. The second flowmeter 6 is arra...

Embodiment 2

[0029] As a further solution of Embodiment 1, in this embodiment, a third flow meter 18, an emptying pipeline and a fourth flow meter 21 are also provided, and the third flow meter 18 is provided and connected to the residence chamber 8 and the PM cutter 19 Between them, the emptying pipeline is led out from the dwelling chamber 8, and is connected to the second proportional valve 20, the fourth flow meter 21 and the particulate matter filter 22 in sequence, and then is emptied.

[0030] In this embodiment, the third flowmeter 18 and the fourth flowmeter 21 are set to accurately monitor the gas volume at the outlet of the dwelling chamber 8. Since the PM in the flue gas has aging problems in the air, the sampling process will be based on different Sampling requirements require different precise flow control. Once the flow rate entering the residence chamber 8 is greater than the sampling flow rate, the pressure of the residence chamber 8 will increase, resulting in an increase ...

Embodiment 3

[0033] In this embodiment, the structure of the front part is the same as that of Embodiment 1 or Embodiment 2, and the sampling analysis unit specifically includes a split chamber 23, a PM analyzer 24, a PM collector 25, a ball valve 26, a flow meter 27, a sampling pump 28, a split chamber 23 is respectively connected to PM analyzer 24 and PM collector 25, and PM collector 25 is connected to sampling pump 28 through ball valve 26 and flow meter 27 in turn. Such as figure 1 As shown, according to needs, multiple PM collectors 25 can be drawn out from the split chamber 23, and three are provided in this embodiment, and a ball valve 26 and a flow meter 27 are respectively provided correspondingly, and finally connected to the sampling pump 28.

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Abstract

The invention relates to the field of environmental monitoring equipment and particularly relates to a PM2.5 (Particulate Matter 2.5) source analyzing and sampling device based on flow feedback control. The PM2.5 source analyzing and sampling device comprises a flue gas collecting assembly, a mixing residence chamber, a PM cutter and a sampling analysis unit, wherein the flue gas collecting assembly is connected to the mixing residence chamber, and the mixing residence chamber is connected to the sampling analysis unit through the PM cutter. The PM2.5 source analyzing and sampling device further comprises a second flowmeter and an air conveying unit, wherein the second flowmeter is connected between the flue gas collecting assembly and the mixing residence chamber, the air conveying unit comprises an air pump, an air filter, a buffer tank, a first proportional valve, an air conveying sensor unit and a first flowmeter, the air pump is connected to the buffer tank through the air filter, the buffer tank is connected to the first flowmeter through the first proportional valve and the air conveying sensor unit, and the first flowmeter is connected to the mixing residence chamber. According to the PM2.5 source analyzing and sampling device, the traditional stationary pollution source sampling manner is adopted, the existing products can be subjected to improvement processing, the difficulty of manufacturing is lowered, the cost is relatively low, and thus, popularization is facilitated.

Description

technical field [0001] The invention relates to the field of environmental monitoring equipment, and relates to a sampling system for particulate matter emitted by fixed combustion sources, in particular to special equipment for collecting PM2.5. Background technique [0002] PM2.5 is a kind of fine particulate matter that can be inhaled in the lungs, its diameter is less than 2.5 microns, and it accounts for about 80% of the inhalable particulate matter PM10. However, during the combustion of fossil fuels, a large amount of particulate matter will be produced, which will be directly discharged into the air, which will endanger human health, cause air pollution and damage the ecological environment, especially PM2. The health and atmospheric environment have a greater impact. The existing technology mainly focuses on the dust removal of PM2.5 fine particles. There is no clear test data on the actual application effect. This involves the sampling and analysis of PM2.5 from fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24
Inventor 刘德允范黎锋陈莹贺磊梁宵王思敏
Owner NANJING ASSEN ENVIRONMENT TECH
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