CN205120433U - Smoke particulate dilution method sampling device - Google Patents
Smoke particulate dilution method sampling device Download PDFInfo
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- CN205120433U CN205120433U CN201520911789.6U CN201520911789U CN205120433U CN 205120433 U CN205120433 U CN 205120433U CN 201520911789 U CN201520911789 U CN 201520911789U CN 205120433 U CN205120433 U CN 205120433U
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- 238000005070 sampling Methods 0.000 title claims abstract description 42
- 238000003113 dilution method Methods 0.000 title claims abstract description 11
- 239000000779 smoke Substances 0.000 title abstract description 8
- 238000010790 dilution Methods 0.000 claims abstract description 81
- 239000012895 dilution Substances 0.000 claims abstract description 81
- 239000003546 flue gas Substances 0.000 claims abstract description 62
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 36
- 230000032683 aging Effects 0.000 claims abstract description 20
- 239000012159 carrier gas Substances 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000013618 particulate matter Substances 0.000 abstract 3
- 238000012544 monitoring process Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003189 isokinetic effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a smoke particulate dilution method sampling device, dilute unit (2 -4), second grade including the sampling rifle (2 -1) that connects gradually, one -level and dilute unit (2 -7), flue gas aging room (2 -9) and the flue gas unit (2 -10) of giving vent to anger, give vent to anger the gas outlet department of unit (2 -10) at the flue gas and be provided with particulate matter acquisition unit (2 -11), the flue gas of emission in the flue dilutes, stops ageing back by particulate matter acquisition unit collection particulate matter wherein through the sampling of sampling rifle through one -level dilution, second grade, the one -level is diluted unit (2 -4) and is adopted porous dilution, and the second grade dilutes unit (2 -7) and adopts the efflux to dilute. The utility model discloses stability is high, and it is effectual to sample.
Description
Technical field
The utility model belongs to environmental monitoring technology field, relates to a kind of flue gas particles dilution method sampling apparatus.
Background technology
Current China atmospheric environment outstanding problem, regional gray haze takes place frequently, and causes extensive concern.Gray haze is formed mainly to be increased by fine particle (PM2.5) in air and causes, and the PM2.5 of the fixed combustion source emission based on fire coal is the main source of PM2.5 in air.How rationally to gather particle from fixed combustion source emission, understand its domain size distribution and physicochemical characteristic, for atmospheric pollution source resolution, formulate pollution prevention measure, improve village environment air quality tool is of great significance.
For the collection of fine particle in stationary source flue gas, main employing dilution tunnel method is carried out, the ultimate principle of the method is in dilution tunnel, utilized by high-temperature flue gas pure air to dilute, and be cooled to atmospheric temperature, after staying for some time, fine particle is sampled device and is separated by certain particle size and traps.Its advantage is a cancellation that flue-gas temperature is high, high humidity, fine particle concentration are high and the impact of other gases, the Combustion Source method of sampling is simplified, expand the usable range of filter membrane simultaneously, also simplify and expand the measurement range of chemical species, also make the application of more advanced aerosol measurement device in Combustion Source become possibility simultaneously.
Chinese utility model patent (publication number CN1614385A) relate to a kind of contour tracking fixed source diluting sampling system, comprise sampling head, heating tube, one-level dilution chamber, secondary dilution chamber, chamber, sampling thief, data acquisition unit etc., because it adopts inverted U to design, and chamber design volume is larger, make equipment set more complicated and huge, and many stationary source sampling locations narrow space, limit it and use on a large scale.
In sum, the stationary source flue gas particles dilution method sampling apparatus developed sampling system miniaturization, be suitable for rig-site utilization is necessary.
Utility model content
The utility model provides a kind of flue gas particles dilution method sampling apparatus, and adopt two-stage dilution unit, the former adopts porous to dilute, and the latter adopts jet to dilute.The technical solution of the utility model is as follows:
A kind of flue gas particles dilution method sampling apparatus, comprise the sampling gun (2-1), one-level dilution unit (2-4), secondary dilution unit (2-7), flue gas aging chamber (2-9) and the flue gas outlet cell (2-10) that connect successively, the gas outlet place of flue gas outlet cell (2-10) is provided with particle collecting unit (2-11); The flue gas of discharge is sampled by sampling gun in flue, through one-level dilution, secondary dilution, stop aging after by particle collecting unit collection particle wherein, it is characterized in that,
Described one-level dilution unit (2-4) adopts porous to dilute, and described secondary dilution unit (2-7) adopts jet to dilute;
Described one-level dilution unit (2-4) comprises one-level dilution exocoel (2-41), one-level dilution inner chamber (2-42) and carrier gas well heater (4-4), one-level dilution inner chamber (2-42) offers dilution holes (2-43), dilution holes is designed to conical apertures, and the basal diameter near dilution exocoel is greater than the basal diameter near dilution inner chamber; One-level carrier gas is heated to be hot carrier gas by carrier gas well heater (4-4), and hot carrier gas dilutes exocoel (2-41) along one-level and enters one-level dilution inner chamber (2-42) by dilution holes (2-43);
The gas outlet of flue gas outlet cell (2-10) is multiple, must ensure that at least one communicates with atmospheric environment during sampling.
The beneficial effects of the utility model are:
1) two-stage dilution independently controls, and system stability is high;
2) system adopts linear pattern design, compact conformation, modularization, easy and simple to handle;
3) temperature by changing one-level carrier gas controls the dilution effect of flue gas, can realize mixture temperature adjustable.And one-level diluents, by entering transmission line along the aperture that transmission line distributes, makes dilution more even.
Accompanying drawing explanation
Fig. 1 applies the stationary source flue gas particles dilution method automatic constant speed sampling system one-piece construction schematic diagram of acquisition system of the present utility model.
In figure: 1-flue gas flow rate measure portion; 2-particle collecting part; 3-carrier gas distribution part; 4-automatic constant speed control section.
1-1-pitot tube; 1-2-gas differential pressure transmitter; 2-1-sampling gun; 2-2-gas temperature hygrometer; 2-3-Gas Flowmeter; 2-4-one-level dilution unit; 2-5-gas pressure sensor; The import of 2-6-one-level carrier gas; 2-7-secondary dilution unit; The import of 2-8-secondary carrier gas; 2-9-flue gas aging chamber; 2-10-flue gas outlet cell; 2-11-particle collecting unit; 3-1-air compression unit; 3-2-gas-holder; 3-3-gas diverter; 4-1-data processor; 4-2-one-level carrier gas mass flow controller; 4-3-secondary carrier gas mass flow controller; 4-4-carrier gas well heater.
Fig. 2 is the schematic diagram of the one-level dilution unit adopting porous dilution mode.
In figure: 2-2-gas temperature hygrometer; 2-41 one-level dilution exocoel, 2-42 one-level dilution inner chamber; 2-43 dilution holes; 2-5-gas pressure sensor; The import of 2-6-one-level carrier gas; Arrow represents airflow direction.
Embodiment
Below in conjunction with accompanying drawing, the utility model and application scenarios thereof are described further.
The whole stationary source flue gas particles dilution method automatic constant speed sampling system of particle acquisition system of the present utility model is adopted to comprise flue gas flow rate measure portion, particle collecting part and automatic constant speed control section, as shown in Figure 1.
Flue gas flow rate measure portion comprises pitot tube (1-1) and gas pressure difference transmitter (1-2), gas differential pressure transmitter (1-2) is for measuring the flue gas flow rate of the sampled point guided by pitot tube, and its transmitting measured values is to the data processor (4-1) of automatic constant speed control section;
Particle collecting part comprises the sampling gun (2-1), one-level dilution unit (2-4), secondary dilution unit (2-7), flue gas aging chamber (2-9) and the flue gas outlet cell (2-10) that connect successively, and the gas outlet place of flue gas outlet cell (2-10) is provided with particle collecting unit (2-11); The flue gas of discharge is sampled by sampling gun in flue, through one-level dilution, secondary dilution, stop aging after by particle collecting unit collection particle wherein; Gas Flowmeter (2-3) is provided with, by sampling air flow speed real-time Transmission to data processor (4-1) in sampling gun; One-level dilution unit (2-4) adopts porous to dilute, and secondary dilution unit (2-7) adopts jet to dilute;
Carrier gas distribution part, comprises air compression unit (3-1), gas-holder (3-2) and gas diverter (3-3);
The all parts comprising sampling gun, one-level dilution unit, secondary dilution unit and flue gas aging chamber is fixed with gas temperature hygrometer and gas pressure sensor Real-Time Monitoring smoke behavior everywhere, and each Monitoring Data is admitted to data processor (4-1);
Automatic constant speed control section, comprises data processor (4-1), one-level carrier gas mass flow controller (4-2), secondary carrier gas mass flow controller (4-3) and carrier gas well heater (4-4); The pressurized air discharged from gas-holder (3-2) is divided into two-way through gas diverter (3-3), one tunnel is one-level carrier gas, another road is secondary carrier gas, its flow and flow velocity are controlled by one-level carrier gas mass flow controller (4-2) and secondary carrier gas mass flow controller (4-3) respectively, and wherein one-level carrier gas is heated to be hot carrier gas by carrier gas well heater (4-4);
See Fig. 2, one-level dilution unit (2-4) comprises one-level dilution exocoel (2-41), one-level dilution inner chamber (2-42), and one-level dilution inner chamber (2-42) offers dilution holes (2-43); One-level carrier gas dilutes exocoel (2-41) along one-level and enters dilution inner chamber by dilution holes (2-43), the dilution effect of flue gas is controlled by the flow and temperature changing carrier gas, realize one-level combination gas humidity and temperature adjustable, dilution holes is designed to conical apertures, and the basal diameter near dilution exocoel is greater than the basal diameter near dilution inner chamber;
Data processor (4-1), for receiving the smoke behavior information from monitoring everywhere, and control gas diverter (3-3), one-level carrier gas mass flow controller (4-2) and secondary carrier gas mass flow controller (4-3).
Before preparing sampling, each parts are assembled according to accompanying drawing, checks whether each parts have exception.
Pitot tube (1-1) is first placed in sample, measures flue gas mean flow rate in flue before using by system, and according to the upper size of installing sample nozzle of the flow velocity determination sampling gun (2-1) measured; Use humiture and the water capacity of portable gas humiture dew point hygrometer test flue gas, and determine the heating-up temperature of sampling gun, general heating-up temperature is 120 DEG C.
2 requirements below system should meet when particle gathers simultaneously: one is that flue gas in flue gas aging chamber (2-9) meets collection requirement; Two is the samplings of overall process automatic constant speed.System in use, first realizes flue gas and meets collection requirement.Flue gas after two-stage dilution stops 10-15 second in flue gas aging chamber (2-9), whether meet particle by the condition adjudgement observing flue gas in aging chamber and gather requirement, if meet collection requirement, illustrate that total dilution ratio is rational, namely the air inlet total amount of one-level carrier gas and secondary carrier gas is rational.Secondly, in the rational scope of guarantee air inlet total amount, one-level dilution and secondary dilution air inflow are redistributed, realizes isokinetic sampling.Concrete operations are as follows:
Pitot tube (1-1) and sampling gun (2-1) are placed in sampled point in the lump, sampling gun are heated simultaneously; Open carrier gas distribution part, air compression unit (3-1) works, and gas-holder (3-2) interior gaseous tension remains on 8-10MPa, and gas diverter (3-3) controls air inlet total amount and is divided into two by pressurized air; Open automatic constant speed control section, one-level carrier gas mass flow controller (4-2) and secondary carrier gas mass flow controller (4-3) are started working, and heat one-level carrier gas simultaneously; Now, the gas temperature hygrometer (2-2) on one-level dilution unit (2-4), secondary dilution unit (2-7), flue gas aging chamber (2-9) and the smoke behavior in each unit of gas pressure sensor (2-5) Real-Time Monitoring transfer to data processor (4-1).Data processor (4-1) controls gas diverter (3-3) and regulates until meet collection requirement according to the smoke behavior in flue gas aging chamber (2-9) to carrier gas total amount, receive flue gas flow rate V1 that pitot tube (1-1) records and the extraction velocity of flue gas V2 that Gas Flowmeter (2-3) records simultaneously, and by controlling secondary carrier gas mass flow controller (4-3), regulate secondary carrier gas flow and flow velocity.
When the flue gas in flue gas aging chamber (2-9) meet collection require time, one-level carrier gas and secondary carrier gas air inlet total amount reasonable, under the prerequisite that air inlet total amount is constant, one-level carrier gas mass flow controller (4-2) and secondary carrier gas mass flow controller (4-3) adjust simultaneously, until the speed of evacuation that Gas Flowmeter (2-3) records is equal with flue gas flow rate in flue.One-level carrier gas mass flow controller (4-2) and secondary carrier gas mass flow controller (4-3) response time are less than 1 second, can guarantee the real-time adjusted, and increase the stability of system.
If the flue gas in flue gas aging chamber (2-9) does not meet collection requirement, air inlet insufficient total amount is described, now preferentially increases the air demand of one-level carrier gas, until meet collection requirement.
After above-mentioned adjustment completes, open particle collecting unit (2-11), carry out particulate cascade collection.Flue gas outlet cell (2-10) is designed to six gas outlets, must ensure that at least one communicates with atmospheric environment during sampling, and total flow that gathers must not exceed the total amount extracting flue gas and two-stage dilution gas.
The principle of work of whole stationary source flue gas particles dilution method automatic constant speed sampling system is:
1) Real-Time Monitoring smoke behavior.By gas temperature hygrometer (2-2) that sampling gun, one-level dilution unit, secondary dilution unit, flue gas aging chamber are installed and gas pressure sensor (2-5) Real-Time Monitoring smoke behavior, until the flue gas in flue gas aging chamber (2-9) meets collection requirement.
2) dehumidifying and cooling are responsible in one-level dilution, and secondary dilution is responsible for controlling the speed of evacuation.The dehumidifying of one-level dilution unit (2-4) primary responsibility flue gas and cooling, collection requirement whether is met according to the gas in flue gas aging chamber (2-9), regulate the flow of one-level carrier gas, and by carrier gas well heater (4-4), carrier gas is heated; Secondary dilution unit adopts ejector, regulates jet gas velocity by it, and then controls the speed of evacuation, makes V1=V2, realizes isokinetic sampling.
Claims (1)
1. a flue gas particles dilution method sampling apparatus, comprise the sampling gun (2-1), one-level dilution unit (2-4), secondary dilution unit (2-7), flue gas aging chamber (2-9) and the flue gas outlet cell (2-10) that connect successively, the gas outlet place of flue gas outlet cell (2-10) is provided with particle collecting unit (2-11); The flue gas of discharge is sampled by sampling gun in flue, through one-level dilution, secondary dilution, stop aging after by particle collecting unit collection particle wherein, it is characterized in that,
Described one-level dilution unit (2-4) adopts porous to dilute, and described secondary dilution unit (2-7) adopts jet to dilute;
Described one-level dilution unit (2-4) comprises one-level dilution exocoel (2-41), one-level dilution inner chamber (2-42) and carrier gas well heater (4-4), one-level dilution inner chamber (2-42) offers dilution holes (2-43), dilution holes is designed to conical apertures, and the basal diameter near dilution exocoel is greater than the basal diameter near dilution inner chamber; Diluted exocoel (2-41) by the hot carrier gas after carrier gas well heater (4-4) heating along one-level and enter one-level dilution inner chamber (2-42) by dilution holes (2-43);
The gas outlet of flue gas outlet cell (2-10) is multiple, must ensure that at least one communicates with atmospheric environment during sampling.
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CN201520911789.6U CN205120433U (en) | 2015-11-16 | 2015-11-16 | Smoke particulate dilution method sampling device |
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CN201520911789.6U CN205120433U (en) | 2015-11-16 | 2015-11-16 | Smoke particulate dilution method sampling device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115728120A (en) * | 2022-11-11 | 2023-03-03 | 山东大学 | Dilution cooling device and particulate matter measurement system |
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CN115728120A (en) * | 2022-11-11 | 2023-03-03 | 山东大学 | Dilution cooling device and particulate matter measurement system |
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C14 | Grant of patent or utility model | ||
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 |
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CF01 | Termination of patent right due to non-payment of annual fee |