CN219142385U - Device for continuously sampling and measuring smoke - Google Patents
Device for continuously sampling and measuring smoke Download PDFInfo
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- CN219142385U CN219142385U CN202223387272.0U CN202223387272U CN219142385U CN 219142385 U CN219142385 U CN 219142385U CN 202223387272 U CN202223387272 U CN 202223387272U CN 219142385 U CN219142385 U CN 219142385U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model belongs to the technical field of environmental monitoring, and provides a device for continuously sampling and measuring smoke, which comprises the following components: first PM 2.5 Particulate matter cutter, first flow measurement and adjustment unit, FPM collection and measurement unit, second flow measurement and adjustment unit, first sampling pump, aging unit, third flow measurement and adjustment unit, air input unit, second PM 2.5 Particulate matter cutter, TPM (tire pressure monitor) acquisition and measurement unit, fourth flow measurement and adjustment unit and third PM (particulate matter) 2.5 The device comprises a particulate matter cutter, an APM collecting and measuring unit, a fifth flow measuring and regulating unit and a second sampling pump. The device of the utility model can not cause conversion deviation due to water removal and filtration, and has higher precision.
Description
Technical Field
The utility model belongs to the technical field of environmental monitoring, and particularly relates to a condensable PM in flue gas 2.5 The technical field of continuous sampling and measuring of particulate matters.
Technical Field
PM in fixed pollution source exhaust 2.5 Consists of two parts: one part is capable of capturing PM 2.5 (FPM，filterable PM 2.5 ) The method comprises the steps of carrying out a first treatment on the surface of the Another part is condensable PM 2.5 (CPM，condensable PM 2.5 ) The method comprises the steps of carrying out a first treatment on the surface of the PM trapping 2.5 Refers to particles with aerodynamic diameter (Da) less than or equal to 2.5 mu m which can be trapped by a filter membrane or a filter cartridge at the temperature of flue gas in a flue; but condense PM 2.5 The method is characterized in that volatile and semi-volatile substances which are in a gaseous state at the temperature of flue gas in a flue are diluted and cooled after being discharged into an atmospheric environment, and particles with aerodynamic diameters (Da) less than or equal to 2.5 mu m are formed through homogeneous phase nucleation and heterogeneous nucleation.
For these two parts PM 2.5 There are two different sampling methods, namely direct sampling and dilute sampling, the direct sampling method measuring PM trapping 2.5 The direct sampling method is simple, the sampler is portable, and is a method commonly adopted by the current environmental management and monitoring departments, but the condensable PM is lost 2.5 Thus for condensable PM 2.5 The collection of the (1) is to accurately express PM in the exhaust gas of the fixed pollution source 2.5 An unavailable part.
The condensable particles have close relations with the humidity, temperature and composition of the air in the emission conversion process. Therefore, during sampling, it is important to eliminate as much as possible the interference caused by the conversion conditions.
Disclosure of Invention
In view of this, the present utility model provides a device for continuously sampling and measuring flue gas, comprising: first PM 2.5 Particulate matter cutter, first flow measurement and adjustment unit, and PM trapping device 2.5 (FPM) acquisition and measurement unit, second flow measurement and measurement methodRegulating unit, first sampling pump, aging unit, third flow measurement and regulating unit, air input unit, second PM 2.5 Particulate matter cutter, total Particulate Matter (TPM) collection and measurement unit, fourth flow measurement and adjustment unit, third PM 2.5 A particulate matter cutter, an ambient Air Particulate Matter (APM) collection and measurement unit, a fifth flow measurement and adjustment unit, a second sampling pump; the first PM 2.5 Particulate matter cutter, first flow measurement and adjustment unit, and PM trapping device 2.5 (FPM) the acquisition and measurement unit, the second flow measurement and adjustment unit and the first sampling pump are sequentially communicated through gas paths; the aging unit first interface and the trapped PM 2.5 (FPM) the acquisition and measurement unit is connected in parallel and communicated with the first flow measurement and adjustment unit through a gas circuit pipeline; the second interface of the aging unit is communicated with the third flow measurement and adjustment unit and the air input unit through gas circuits in sequence; the third interface of the aging unit is connected with the second PM 2.5 The particle cutter, a Total Particle (TPM) collecting and measuring unit, a fourth flow measuring and adjusting unit and a second sampling pump are sequentially connected through gas circuits and pipelines; the third PM 2.5 The particle cutter, an ambient Air Particle (APM) collecting and measuring unit and a fifth flow measuring and adjusting unit are connected in parallel to a gas circuit pipeline of the second sampling pump with a fourth flow measuring and adjusting unit after being sequentially connected in a gas circuit.
In a specific embodiment of the present utility model, the air input unit is an air compressor or blower.
In the specific embodiment of the utility model, the air circuit pipeline is provided with a heat preservation device, and the pipeline temperature is higher than the flue gas temperature.
In a specific embodiment of the present utility model, the aging unit further comprises a liquid container, and the fourth interface of the aging unit is communicated with the liquid path pipeline of the liquid container.
The utility model also provides a method for measuring the condensable PM in the flue gas 2.5 A method of (CPM) particulate matter, comprising: total Particulate Matter (TPM) collection and measurement unit collection and capture speed V Total (S) Collectable PM in gas flowing out from aging unit 2.5 Particulate matter and condensable PM 2.5 Total particulate matter M of particulate matter Total (S) Data; condensable PM 2.5 Particulate matter M Coagulation ＝M Total (S) Collectable PM 2.5 Particulate matter M Catching up Collectable PM in air 2.5 Particulate matter M Empty space The method comprises the steps of carrying out a first treatment on the surface of the The V is Total (S) ＝V Empty space +V Feeding in The method comprises the steps of carrying out a first treatment on the surface of the The V is Feeding in ＝V Sample -V Catching up The method comprises the steps of carrying out a first treatment on the surface of the The V is Sample Obtained by measuring a first flow measurement and a regulating unit; the V is Catching up Obtained by measuring a second flow measurement and a regulating unit; the V is Empty space Obtained by the measurement of a third flow measurement and adjustment unit.
In a specific embodiment of the utility model, the trappable PM 2.5 Particulate matter M Catching up Is obtained by collecting and measuring the speed V by an FPM collecting and measuring unit Catching up Collectable PM in sample gas 2.5 The value of the particulate matter is obtained.
In a specific embodiment of the utility model, the trapped PM in the air 2.5 Particulate matter M Empty space Is obtained by using an APM acquisition and measurement unit with acquisition and capture speed of V Empty space Collectable PM in air 2.5 The particle number is obtained.
In a specific embodiment of the utility model, the V Total (S) The gas being V Feeding in Sample gas and V Empty space Air summation; the V is Empty space ：V Feeding in ≥20。
In a specific embodiment of the utility model, the gas flowing out of the aging unit stays in the aging unit for more than 10 seconds.
The utility model introduces that the air on the site of the pollution source chimney enters the aging chamber for aging, and the condition of condensing and converting the air after the air is discharged on the site is closest to the condition of condensing and converting the air, and the temperature and the humidity of the air are consistent with those of natural discharge, so that the conversion deviation caused by water removal and filtration can be avoided. The utility model starts from the natural aging angle of the condensable particles, is closest to the conversion condition in the real environment, and aims at optimizing the aging condition, expanding the online monitoring principle and automatically switching manual and online membrane replacement.
Drawings
Fig. 1 is a diagram of a device for measuring flue gas by continuous sampling.
Wherein 1 is the first PM 2.5 The particle cutter is characterized in that the particle cutter is composed of a first flow measuring and regulating unit 2, an FPM collecting and measuring unit 3, a second flow measuring and regulating unit 4, a first sampling pump 5, an aging unit 6, a third flow measuring and regulating unit 7, an air compressor or blower 8 and a second PM 9 2.5 The particle cutter, 10 is TPM collecting and measuring unit, 11 is fourth flow measuring and regulating unit, 12 is third PM 2.5 The particulate matter cutter, 13 is APM acquisition and measurement unit, 14 is the fifth flow measurement and adjustment unit, 15 is the second sampling pump.
Detailed Description
Examples
The utility model aims to solve the problem that PM (particulate matters) can be condensed in the existing flue gas 2.5 The difficult problems of incapability of accurately sampling, measuring and online continuous monitoring of particulate matters are solved, and a set of device capable of accurately sampling and measuring condensable PM is established 2.5 An apparatus and method for accurately sampling, measuring and on-line monitoring particulate matters.
The core point of the utility model is to use the original air of the site for dilution and aging. The original air is used for natural mixing, cooling and aging, zero air is not used for aging, the real emission condition is closest, the condensable particulate matters can be accurately sampled, and further, the condensable particulate matters can be accurately measured.
Manual weighing method, national standard method for monitoring particulate matters and standard method for comparison. PM trapping 2.5 Refers to particles with aerodynamic diameter (Da) less than or equal to 2.5 mu m which can be trapped by a filter membrane or a filter cartridge at the temperature of flue gas in a flue; condensable PM 2.5 The method is characterized in that volatile and semi-volatile substances which are in a gaseous state at the temperature of flue gas in a flue are diluted and cooled after being discharged into an atmospheric environment, and particles with aerodynamic diameters (Da) less than or equal to 2.5 mu m are formed through homogeneous phase nucleation and heterogeneous nucleation. Total particulate matter: refers to the sum of condensable particulates and trappable particulates in the flue.
The utility model provides a device for continuously sampling and measuring smokeThe device comprises: first PM 2.5 A particulate matter cutter, a first flow measuring and regulating unit, an FPM collecting and measuring unit, a first sampling pump, a second flow measuring and regulating unit, an aging unit, a third flow measuring and regulating unit, an air input unit, a second PM 2.5 Particulate matter cutter, TPM (tire pressure monitor) acquisition and measurement unit, fourth flow measurement and adjustment unit and third PM (particulate matter) 2.5 The device comprises a particulate matter cutter, an APM acquisition and measurement unit, a fifth flow measurement and adjustment unit and a second sampling pump;
the first PM 2.5 The particulate matter cutter, the first flow measuring and adjusting unit, the FPM collecting and measuring unit, the second flow measuring and adjusting unit and the first sampling pump are communicated through gas circuits in sequence.
The aging unit first interface and the FPM acquisition and measurement unit are connected in parallel and communicated with the first flow measurement and adjustment unit gas circuit pipeline; the second interface of the aging unit is communicated with the third flow measurement and adjustment unit and the air input unit through gas circuits in sequence; the third interface of the aging unit is connected with the second PM 2.5 The particulate matter cutter, the TPM acquisition and measurement unit and the fourth flow measurement and adjustment unit are connected in parallel with the fifth flow measurement and adjustment unit after being sequentially connected with the air circuit pipeline and are sequentially connected with the second sampling pump through the air circuit pipeline; and the fourth interface of the aging unit is communicated with the liquid path pipeline of the liquid container.
The third PM 2.5 The particulate matter cutter, the APM acquisition and measurement unit and the fifth flow measurement and adjustment unit are connected in parallel to a gas circuit pipeline of the second sampling pump with the fourth flow measurement and adjustment unit after being sequentially connected in a gas circuit.
The air input unit is used for providing air with a specific flow rate for the aging unit; may be an air compressor or a blower.
The PM 2.5 The particle cutter is used for cutting particles in the gas into particles with the diameter less than or equal to 2.5 mu m.
The flow measuring and adjusting unit is used for measuring and adjusting the gas flow in the gas circuit pipeline.
The FPM acquisition and measurement unit is used for capturing and measuring the capturable in the gasCollecting PM 2.5 Data for particulate matter.
The sampling pump is used for providing aerodynamic force.
The TPM acquisition and measurement unit is used for capturing and measuring trappable PM in gas 2.5 Particulate matter and condensable PM 2.5 Total particulate matter data for particulate matter.
The APM collecting and measuring unit is used for capturing and measuring the trappable PM in the air 2.5 Particulate matter data.
The online measurement method of the particulate matters is a beta ray method or an oscillating balance method.
The liquid container is used for recovering and storing condensed liquid.
The utility model provides a method for continuously sampling and measuring smoke, which comprises the following steps:
controlling the inlet speed of the sample gas to be V Sample ；
The collecting and measuring speed of the FPM collecting and measuring unit is V Catching up Collectable PM in sample gas 2.5 The value of the particulate matter is M Catching up The method comprises the steps of carrying out a first treatment on the surface of the At the same time the sample gas is V Feeding in Enters an aging unit and simultaneously controls the air inlet speed of air to be V Empty space The method comprises the steps of carrying out a first treatment on the surface of the The V is Empty space ：V Feeding in ≥20；
The V is Sample ＝V Feeding in +V Catching up ；
The residence time of the mixed gas of the sample gas and the air in the aging unit exceeds 10 seconds so as to realize full mixing and aging;
TPM acquisition and measurement Unit acquisition and Capture speed V Total (S) Collectable PM in gas 2.5 Particulate matter and condensable PM 2.5 Total particulate matter M of particulate matter Total (S) Data; the V is Total (S) ＝V Empty space +V Feeding in ；
The acquisition and capture speed of the APM acquisition and measurement unit is V Back of body Collectable PM in air 2.5 Particulate matter M Empty space Data;
condensable PM 2.5 Particulate matter M Coagulation =trappable PM 2.5 Particulate matter and condensable PM 2.5 Total particles of particulate matterParticulate matter M Total (S) Collectable PM 2.5 Particulate matter M Catching up Collectable PM in air 2.5 Particulate matter M Empty space 。
As shown in Table 1, the total discharge condensable particulate matter mass concentration of a coal-fired power plant was measured using the present example and sampling Method, and a comparative test was performed using the United states environmental protection agency Standard Method (EPA Method 202). The device and the method can maximally approach the formation process of the condensable particulate matters in the exhaust of the pollutant source smoke into the atmosphere, and the measured result is closer to the actual emission. We use the sum of the condensable particulate precursors as a reference because the precursor is a precursor for the condensable particulate formation conversion, the actual concentration of the condensable particulate discharged should be less than its precursor concentration. As shown in the table, the total concentration of condensable particulate precursor is 2.4mg/m 3 The concentration of condensable particulates was measured to be 2.0mg/m by the present example and sampling method 3 And the result measured by the method of the American environmental protection agency is 3.5mg/m 3 Higher than the condensable particulate precursor concentration value, causing data distortion.
TABLE 1 alignment test data
The utility model introduces that the air on the site of the pollution source chimney enters the aging chamber for aging, and the condition of condensing and converting the air after the air is discharged on the site is closest to the condition of condensing and converting the air, and the temperature and the humidity of the air are consistent with those of natural discharge, so that the conversion deviation caused by water removal and filtration can be avoided. The utility model starts from the natural aging angle of the condensable particles, is closest to the conversion condition in the real environment, and aims at optimizing the aging condition, expanding the online monitoring principle and automatically switching manual and online membrane replacement.
Claims (3)
1. Device for measuring flue gas by continuous sampling, which is characterized by comprising:
first PM 2.5 Particulate matter cutter, first flow measurementThe device comprises a regulating unit, an FPM collecting and measuring unit, a second flow measuring and regulating unit, a first sampling pump, an aging unit, a third flow measuring and regulating unit, an air input unit, a second PM2.5 particulate matter cutter, a TPM collecting and measuring unit, a fourth flow measuring and regulating unit, a third PM2.5 particulate matter cutter, an APM collecting and measuring unit, a fifth flow measuring and regulating unit and a second sampling pump;
the first PM 2.5 The particulate matter cutter, the first flow measuring and adjusting unit, the FPM collecting and measuring unit, the second flow measuring and adjusting unit and the first sampling pump are sequentially communicated through gas circuits;
the aging unit first interface and the FPM acquisition and measurement unit are connected in parallel and communicated with the first flow measurement and adjustment unit gas circuit pipeline;
the second interface of the aging unit is communicated with the third flow measurement and adjustment unit and the air input unit through gas circuits in sequence;
the third interface of the aging unit is connected with the second PM 2.5 The particulate matter cutter, the TPM acquisition and measurement unit, the fourth flow measurement and adjustment unit and the second sampling pump are sequentially connected through gas circuits and pipelines;
the third PM 2.5 The particulate matter cutter, the APM acquisition and measurement unit and the fifth flow measurement and adjustment unit are connected in parallel to a gas circuit pipeline of the second sampling pump with the fourth flow measurement and adjustment unit after being sequentially connected in a gas circuit.
2. The apparatus for continuous sampling of flue gas according to claim 1, wherein the air input unit is an air compressor or blower.
3. The apparatus for continuous sampling of measured flue gas according to claim 1, further comprising a liquid container, the fourth port of the aging unit being in fluid communication with the liquid container fluid line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223387272.0U CN219142385U (en) | 2022-12-16 | 2022-12-16 | Device for continuously sampling and measuring smoke |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223387272.0U CN219142385U (en) | 2022-12-16 | 2022-12-16 | Device for continuously sampling and measuring smoke |
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| CN219142385U true CN219142385U (en) | 2023-06-06 |
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| CN202223387272.0U Active CN219142385U (en) | 2022-12-16 | 2022-12-16 | Device for continuously sampling and measuring smoke |
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