PM2.5 (Particulate Matter 2.5) source analyzing and sampling device based on multichannel parallel feedback control

A feedback control and sampling device technology, applied in the direction of sampling device, multi-fluid ratio control, test sample preparation, etc., can solve the problems of inability to accurately control the dilution ratio, single smoke sampling method, etc., and achieve easy promotion and production Effect of reduced difficulty and low cost

Inactive Publication Date: 2015-06-24
NANJING ASSEN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem in the prior art that the flue gas sampling method is single, the dilution ratio cannot be accurately controlled, and then the real state of the particulate matter emitted by the pollution source in the atmosphere is simulated, the present invention provides a PM2.5 source based on multi-channel parallel feedback control Analytical sampling device, which enables accurate sampling and simulation of particle aging

Method used

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  • PM2.5 (Particulate Matter 2.5) source analyzing and sampling device based on multichannel parallel feedback control

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the PM2.5 source analysis sampling device based on multi-channel parallel feedback control in this embodiment includes a flue gas collection component, a mixing residence chamber, a PM cutter 19, and a sampling and analysis unit.

[0028] 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 mix and stay, 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. The sampling and analysis unit is a multi-channel parallel sampling and analysis unit. Ability to simultaneously adopt mu...

Embodiment 2

[0032] 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.

[0033] 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

[0036] In this embodiment, the structure of the first part is the same as that of Embodiment 1 or Embodiment 2. The multi-channel parallel sampling and analysis unit specifically includes a flow distribution chamber 23, a PM collection and adsorption chamber 25, a sampling proportional valve 26, a sampling flow meter 27, a sampling Pump 28, emptying pipeline proportional valve 29, exhausting air pump 30, emptying particulate matter filter 31, emptying flowmeter 32, PM collection adsorption chamber 25 communicates with distribution chamber 23, and PM collector adsorption chamber 25 sequentially passes through the sampling The proportional valve 26 and the sampling flowmeter 27 are connected to the sampling pump 28, and the split chamber 23 is also sequentially connected to the proportional valve 29, the exhaust air pump 30, the exhaust particulate filter 31, and the exhaust flowmeter through the exhaust pipeline. 32. As a backup solution, the split chamber 23 can also be emptie...

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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 multichannel parallel feedback control. The PM2.5 source analyzing and sampling device comprises a flue gas collecting assembly, a mixing residence chamber, a PM cutter, a sampling analysis unit, 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, the first flowmeter is connected to the mixing residence chamber, and the sampling analysis unit is a multichannel parallel sampling analysis unit and can be used for carrying out multichannel simultaneous sampling and controlling sampling flow. 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 Applications(China)
IPC IPC(8): G01N1/24G01N1/38G05D11/13
Inventor 刘德允范黎锋李凌丰贺磊梁宵王思敏
Owner NANJING ASSEN ENVIRONMENT TECH
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