CN109596482A - A kind of atmospheric aerosol smog system measuring particulate matter chemical constituent - Google Patents
A kind of atmospheric aerosol smog system measuring particulate matter chemical constituent Download PDFInfo
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- CN109596482A CN109596482A CN201811624984.5A CN201811624984A CN109596482A CN 109596482 A CN109596482 A CN 109596482A CN 201811624984 A CN201811624984 A CN 201811624984A CN 109596482 A CN109596482 A CN 109596482A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Abstract
The present invention relates to a kind of atmospheric aerosol smog systems for measuring particulate matter chemical constituent, including being sequentially connected aerosol cloud case, the online particulate matter chemical constituent mass spectrum of the burner, simulated atmosphere pollutant emission of the simulation biomass open burning connect into atmosphere；System of the invention is provided simultaneously with three functions, the process of accurate, true simulation biomass open burning discharge atmosphere pollution；It is artificial controllably and repeatably to simulate atmosphere pollution produced by agricultural crop straw open burning in the physical-chemical reaction of troposphere or even each height of stratosphere, while excluding the influence of the factors such as meteorology complicated in actual environment, landform；And pass through online particulate matter chemical constituent mass spectrum, the mass concentration and chemical composition of fusibleness component are blamed in test 0.04-1.0 micron particles object, reach the mass concentration and chemical composition that fusibleness component is blamed in analysis comprehensively and test 0.04-1.0 micron particles object, test result is accurate and reliable.
Description
Technical field
The present invention relates to a kind of atmospheric aerosol smog systems for measuring particulate matter chemical constituent.
Background technique
China is used as worldwide large agricultural country, and agricultural crop straw owning amount occupies first place in the world, according to statistics, about
20% or more agricultural crop straw is by direct open burning.Atmospheric aerosol caused by agricultural crop straw open burning is to environment
Deterioration (formation of such as haze) and visibility reduction play an important role, and can participate in propagation in atmosphere and chemical process, special
Different optical property and chemical component affects ground surface irradiation balance and oxidizing capacity, and can be effectively as cloud condensation nucl
Direct or indirect affects weather and solution-air circulation；Furthermore atmospheric aerosol caused by agricultural crop straw open burning has
Significant incoming call toxicity, potential threat is also played to population health.
However, being difficult to the physics of atmosphere pollution caused by capturing agricultural crop straw open burning in real atmosphere environment
Chemical process discharges the regional environment influence of atmosphere pollution, gas to further appreciate that and studying agricultural crop straw open burning
The problem for waiting effect and resident's physical and mental health needs to discharge atmosphere pollution by the method that laboratory experiment is simulated to study it
Caused environment effect and climatic effect.
Smog box is a kind of applied to the essential photochemical reaction simulation for carrying out atmosphere environmental chemistry analog study
Device can not only exclude the influence of the factors such as meteorology complicated in actual environment, landform, can also be artificial controllable and repeatable
Under conditions of simulated atmosphere chemical process, refine Atmospheric Chemistry reacting quintessence, obtain the mechanism mechanism of reaction, and verify atmospheric
Mode, research achievement can also provide scientific basis for the formulation of prevention and control of air pollution countermeasure.
The research origin of external smog box is in the 1970s, Univ North Carolina-Chapel Hill USA in 1976 establishes outdoor
Smog box, to collect data evaluation chemical reaction mechanism.The research of domestic smog box is started late, and Peking University builds in nineteen eighty-two
At domestic earliest indoor smog case；China Environmental Science Research Institute builds up the indoor smog case of quartz material nineteen ninety-five；Tsing-Hua University
University builds up relatively large outdoor smog box experimental system for 2005.However, special for the big of simulation biomass open burning
Gas aerosol cloud case system even lacks at home.The atmosphere that Various Complex can be generated during biomass open burning is dirty
Object is contaminated, is diffused at the top of troposphere wherein a large amount of small-molecular-weight pollutant can rise with the vertical convection campaign of air, and with
Atmospheric circulation participates in the atmosphere pollution transmission process in global range.It is big to be generated during simulation biomass open burning
The reaction and transmission process of gas pollutant need to provide low temperature, and low pressure continues the environment of high light radiation, and existing atmosphere gas is molten
Glue smog box is because the limitation of its material and structure (most of to use FEP-Teflon film) can not achieve, in addition, existing big
Gas aerosol cloud box function is single, is unable to test particle chemical constituent.
For preferably disclose environment effect caused by agricultural crop straw open burning source emission atmosphere pollution and
Climatic effect, so relevant policies further are formulated for country, and scientific support is provided, reach mitigation and controls the mesh of atmosphere pollution
, need a kind of atmospheric aerosol smog system for measuring particulate matter chemical constituent.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of atmospheric aerosol smog system for measuring particulate matter chemical constituent
System.
The present invention is achieved by the following scheme:
A kind of atmospheric aerosol smog system measuring particulate matter chemical constituent, including being sequentially connected the simulation biomass connect
Aerosol cloud case of the burner, simulated atmosphere pollutant emission of open burning into atmosphere, online particulate matter chemical group
Sub-prime spectrum；
Aerosol cloud case of the simulated atmosphere pollutant emission into atmosphere includes at least: closed cabinet, position
Blender in bottom in cabinet, the vacuum pump for vacuumizing to closed cabinet, the atmosphere pollution through cabinet input
It manages, is provided with check valve on atmosphere pollution input pipe, to the humidifier of offer moisture in cabinet, and be located in the box body portion
Black light lamp, the cabinet include inner housing and outer housing, and the cavity between inner housing and outer housing is divided into refrigerant and follows
Circular layer and heat-barrier coating are provided with gas test mouth and gas supplementing opening through inner housing and outer housing；
Gas delivery tube on burner bell is connected to the atmosphere pollution input pipe of aerosol cloud case, aerosol
The gas test mouth of smog box is connect by conductive rubber pipe with online particulate matter chemical constituent mass spectrum, online particulate matter chemical group
Sub-prime spectrum is the online particulate matter chemical constituent mass spectrum of ACSM, is provided with check valve on gas test mouth.
Preferred according to the present invention, the burning furnace shell is the structure of the other end open at one end sealing, bell setting
At combustion furnace shell nozzle end, bell is connect with combustion furnace housing seal, and gas delivery tube, gas are provided at the top of bell
Transfer tube is connected to combustion furnace enclosure interior, and burning web is horizontally arranged in burning furnace shell, and the setting of tonifying Qi transfer tube is being fired
The lower section of net is burnt, tonifying Qi transfer tube passes through burning furnace shell and extends to outside shell and connect with air supplying pump, in tonifying Qi transfer tube
It is provided with flow controller and particulate filter on pipeline, makes tonifying Qi flow control in 4-10L/min by flow controller,
Preferably, tonifying Qi flow velocity is 6-9L/min, the top of burning web is provided with testing tube, testing tube extends to outside shell and and cigarette
The connection of gas analyzer.
It is preferred according to the present invention, sealing ring is provided between combustion furnace shell nozzle end and bell, burn furnace shell
Open end is fixedly connected with bell by clips.
Preferred according to the present invention, burning furnace shell is cylindrical housings, and bell is inverted funnel shape, the top of inverted funnel shape
Spout of funnel is connect with gas delivery tube, and bell open end internal diameter matches with combustion furnace shell nozzle end internal diameter, on burning web
Transparent windows are provided on the shell in portion.
Preferred according to the present invention, combustion furnace body height is 800-1200mm, interior diameter 700-800mm, bell
Inner sidewall is coated with Teflon anti-stick coating, and the height of bell is 100-200mm, and bell bottom open end internal diameter is 700-
800mm。
Preferred according to the present invention, the inner sidewall of gas delivery tube is coated with Teflon anti-stick coating, gas delivery tube
Interior diameter is 20-40mm.
Preferred according to the present invention, burning web is round asbestos burning web, and the periphery of burning web is provided with rigid fixed frame,
The other end of rigid fixed frame is fixed on the inner sidewall of burning furnace shell.
It is preferred according to the present invention, in the bottom of burning web, electric ignition device, electric ignition device and burning furnace shell are set
Ignitor switch electrical connection outside side wall, electric ignition device are close to burning sieve bottom.
Preferred according to the present invention, the flue gas analyzer is moral figure testo350pro flue gas analyzer, particulate matter mistake
Filter is highly effective air particulate matter (HEPA) filter.
Preferred according to the present invention, the inner sidewall of tonifying Qi transfer tube is coated with Teflon anti-stick coating, tonifying Qi transfer tube
Interior diameter is 10-30mm.
Preferred according to the present invention, bottom is provided with collection tray in burning furnace shell.
Preferred according to the present invention, the tonifying Qi transmission tube end in burning furnace shell is provided with nozzle, nozzle and combustion
The center for burning net is opposite, and the distance between nozzle and burning web are 10-15cm.
Simulate the burner of biomass open burning, the distance between nozzle and burning web, tonifying Qi flow velocity, combustible substance
Selection, combustible substance amount, the dehydration of combustible substance experience, the precipitation of volatile matter and burning (appearance of open fire), fire can be made
Yin after flame extinguishing burns and (burns on the surface of coke) and ashes form the equal stages, and burning time is long, temperature height, with reality scene
Under open burning process be consistent, make combustible substance indoors in the case of real simulation open burning process, fire its open fire
It burns, avoids stewing combustion, avoid burning insufficient, it is true, accurate to simulate the actual conditions of open burning, it can true and accurate simulation
The whole process of open biomass combustion.
Preferred according to the present invention, the cabinet is cylinder, and cylindrical both ends are respectively the arc of outwardly convex,
Cabinet internal upper part is provided with temperature monitoring probe and humidity detection probe, temperature monitoring probe and the outer temperature indicator electricity of cabinet
Connection, humidity detection probe are electrically connected with the outer wetness display unit of cabinet, and middle part is arranged in cabinet in black light lamp parallel interval, each
Black light lamp is electrically connected with the black light lamp switch outside cabinet, and optical inductor, optical inductor and the outer light of cabinet are additionally provided in cabinet
Ratemeter electrical connection.
It is preferred according to the present invention, it is provided with cleaning mouth in cabinet middle part of sliding channel through inner housing and outer housing, cleans
Sealing cover is provided on mouthful, sealing cover is connect by sealing flange with cleaning mouth, is realized sealing cover and is cleaned the sealed connection of mouth.
Preferred according to the present invention, the external blowdown pipe of gas supplementing opening, blowdown pipe is connect with gas pump, and stream is provided on blowdown pipe
Amount controller and particulate filter are additionally provided with waste gas outlet through inner housing and outer housing in lower box.
Preferred according to the present invention, refrigerant circulation layer is connect with the circulation line outside cabinet, is arranged on circulation line
There is circulating pump.
Preferred according to the present invention, bottom is provided with smog box support frame, the motor outside blender and cabinet outside the enclosure
The outer housing of electrical connection, the rotation of motor driven blender, smog box is Stainless Steel Shell, and inner housing is Stainless Steel Shell, inner casing
The Teflon anti-stick coating of 0.3mm is coated on the inner wall of body, the volume of smog box is 4-8m3。
Online particulate matter chemical constituent mass spectrum of the invention is the prior art, is purchased from Aerodyne company, which can
The quality of fusibleness component (abbreviation: NR-PM1) in real time and is directly blamed in quantitative measurment and display 0.04-1.0 micron particles object
Concentration and chemical composition, including organic matter, sulfate, nitrate, ammonia salt and chloride ion, and high degree of automation, Operation and Maintenance
Simplicity is simply provided and automatic on-line monitoring can be realized, the accurate particulate matter chemical constituent for detecting extremely low concentration.
A kind of atmospheric aerosol smog systematic difference method measuring particulate matter chemical constituent, comprises the following steps that
1) the clean biomass of 5-15g is weighed, drying is placed on the burning web of burner and spreads out, and opens tonifying Qi
Pump inputs the air without particulate matter to furnace shell is burnt by tonifying Qi transfer tube, opens flue gas analyzer, observes spectrogram and record
CO、CO2Initial concentration, put biomass-burning, CO and CO provided by flue gas analyzer in real time during biomass combustion2's
Concentration value simultaneously calculates efficiency of combustion, adjusts tonifying Qi flow velocity by air supplying pump and guarantees that the efficiency of combustion of biomass is more than or equal to 0.9；
2) it is vacuumized by cabinet of the vacuum pump to aerosol cloud case, pressure in aerosol cloud case is made to reach 8-
12Pa closes vacuum pump, the check valve on atmosphere pollution input pipe is opened, by falling after the atmosphere pollution above burner
The mode of suction enters the atmospheric aerosol smog box of vacuum by gas delivery tube, check valve is closed after 4-6min, according to simulation
Atmosphere pollution in troposphere or even stratosphere actual environment background, adjust smog the temperature inside the box, humidity, intensity of illumination, lead to
Pressure in gas supplementing opening tonifying Qi adjusting tank body is crossed, turn on agitator stirring keeps internal mix uniform, after parameter stability, opens gas
Body tests mouth, and the matter by blaming fusibleness component in online particulate matter chemical constituent mass spectrometric measurement 0.04-1.0 micron particles object
Measure concentration and chemical composition.
By taking mid latitudes as an example, mid latitudes atmosphere convection layer height is 10-12km, the environment temperature in troposphere
Under normal circumstances with the every raising 100m of height, 0.6 DEG C is reduced.It is 17 DEG C of calculating, mid latitudes pair with sea level environment temperature
Environment temperature at the top of fluid layer is about -55 DEG C.In the present invention, atmospheric aerosol smog box inside and outside wall is all made of stainless steel material,
The extreme environment of tolerable low-temp low-pressure, and the humidity control apparatus in smog box can make relative humidity from 0.5% to
100%.
System of the invention has the characteristics that following three: mending first is that being adjusted by real-time monitoring agricultural crop straw efficiency of combustion
Tolerance guarantees the prolonged open fire burning of straw sample, more preferable simulation agricultural crop straw open burning process；Second is that passing through tune
The parameters such as temperature, humidity, air pressure, the intensity of illumination of smog box are saved, artificial controllably and repeatably simulation agricultural crop straw is outdoor
Atmosphere pollution produced by burning while excluding actual environment in the physical-chemical reaction of troposphere or even each height of stratosphere
The influence of the factors such as meteorology, the landform of middle complexity；Then by online particulate matter chemical constituent mass spectrum, 0.04-1.0 microns are tested
The mass concentration and chemical composition of fusibleness component are blamed in particulate matter, this system realizes outdoor simulated combustion, true and accurate simultaneously
The temperature of simulation real atmosphere environmental background, humidity, air pressure, blame in intensity of illumination and 0.04-1.0 micron particles object
The triple function of mass concentration and the chemical composition test of fusibleness component.
System of the invention is preferably to disclose area caused by agricultural crop straw open burning source emission atmosphere pollution
Domain environmental effect and climatic effect play the role of crucial foundation.
The beneficial effects of the present invention are:
1, the atmospheric aerosol smog system of measurement particulate matter chemical constituent of the invention is provided simultaneously with three functions, quasi-
Really, the process of biomass open burning discharge atmosphere pollution is really simulated；It is artificial controllable and repeatably simulate crops
Atmosphere pollution produced by stalk open burning excludes simultaneously in the physical-chemical reaction of troposphere or even each height of stratosphere
The influence of the factors such as complicated meteorology, landform in actual environment；And pass through online particulate matter chemical constituent mass spectrum, test
The mass concentration and chemical composition of fusibleness component are blamed in 0.04-1.0 micron particles object, it is raw that the present invention is sequentially connected the simulation connect
Aerosol cloud case of the burner, simulated atmosphere pollutant emission of substance open burning into atmosphere, online particle materialization
It learns and cooperates between component mass spectrum three, reach in analysis comprehensively and test 0.04-1.0 micron particles object and blame fusibleness component
Mass concentration and chemical composition, test result is accurate and reliable.
2, the atmospheric aerosol smog system of measurement particulate matter chemical constituent of the invention is produced using Aerodyne company
Online particulate matter chemical constituent mass spectrum (ACSM), the equipment can in real time and directly quantitative measurment and display 0.04-1.0 be micro-
The mass concentration and chemical composition of fusibleness component (referred to as: NR-PM1), including organic matter, sulfate, nitre are blamed in rice grain object
Hydrochlorate, ammonia salt and chloride ion, and high degree of automation, simple and convenient operation and maintenance are simply provided and automatic on-line monitoring can be realized, can
The particulate matter chemical constituent of accurate detection extremely low concentration.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for measuring the atmospheric aerosol smog system of particulate matter chemical constituent；
In figure, 1 be clips, 2 be transparent windows, 3 be electric ignition device, 4 be electric ignitor switch, 5 be burning ashes
Collection tray, 6 be gas delivery tube, 7 be bell, 8 be sealing ring, 9 be moral figure testo350pro flue gas analyzer, 10 be stone
Cotton burning web, 11 be rigid fixed frame, 12 be tonifying Qi transfer tube, 13 be flow controller, 14 be high-efficiency particulate filter
(HEPA), 15 be air supplying pump, 16 be burning furnace shell,
17 check valves, 18 temperature indicators, 19 humidifiers, 20 wetness display units, 21 inner housings, 22 refrigerant circulation layers,
23 heat-barrier coatings, 24 gas test mouths, 25 gas supplementing openings, 26 waste gas outlets, 27 refrigerant circulation lines, the support of 28 smog boxes
Frame, 29 magnetic stirring apparatus, 30 vacuum pumps, 31 sealing covers, 32 sealing flanges, 33 black light lamps, 34 cleaning mouths, 35 outer housings；36 lead
Electric rubber tube, 37 online particulate matter chemical constituent mass spectrums (ACSM).
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, however, the present invention is not limited thereto.
Efficiency of combustion formula: η=[CO2 straw burnings]/([CO2 straw burnings]+[COStraw burning])
Embodiment 1:
A kind of atmospheric aerosol smog system measuring particulate matter chemical constituent, structure is as shown in Figure 1, include being connected
Simulate biomass open burning aerosol cloud case into atmosphere of burner, simulated atmosphere pollutant emission, online
Grain object chemical constituent mass spectrum 37.
Burner includes the burning furnace shell 16 of other end sealing open at one end, and burning furnace shell is cylindrical housings,
Burn a height of 1000mm of furnace shell, interior diameter 750mm, is provided with bell 7 at combustion furnace shell nozzle end, is firing
It burns to be provided with sealing ring 8, combustion furnace shell nozzle end and bell between furnace shell open end and bell and fix by clips 1 and connect
It connects, bell is inverted funnel shape, and the top funnel mouth of inverted funnel shape is connect with gas delivery tube 6, gas delivery tube 6 and burning furnace shell
Internal portion communicates.The inner sidewall of bell is coated with Teflon anti-stick coating, and the height of bell 7 is 150mm, bell bottom open end
Internal diameter position 750mm, bell bottom open end internal diameter match with combustion furnace shell nozzle end internal diameter, the inside of gas delivery tube 6
Wall is coated with Teflon anti-stick coating, and the interior diameter of gas delivery tube is 30mm.
Burning web 10 is horizontally arranged in burning furnace shell, burning web is round asbestos burning web, the periphery of burning web
It is provided with rigid fixed frame 11, the other end of rigid fixed frame is fixed on the inner sidewall of burning furnace shell.Under burning web
Portion is provided with tonifying Qi transfer tube 12, and tonifying Qi transfer tube 12 is extended to outside shell through burning furnace shell and connect with air supplying pump 15,
Flow controller 13 and high-efficiency particulate filter (HEPA) 14 are provided on the pipeline of tonifying Qi transfer tube 12, in burning web
Top is provided with testing tube, and testing tube is extended to outside shell and connect with moral figure testo350pro flue gas analyzer 9.It is burning
Transparent windows 2 are provided on the shell in online portion.
Electric ignition device 3 is set in the bottom of burning web, electric ignition device 3 is opened with the electricity sparking outside combustion furnace housing sidewall
Close 4 electrical connections.The inner sidewall of tonifying Qi transfer tube 12 is coated with Teflon anti-stick coating, and the interior diameter of tonifying Qi transfer tube is 10-
30mm.Bottom is provided with burning ashes collection tray 5 in burning furnace shell, and pipe end is transmitted in the tonifying Qi in burning furnace shell
Portion is provided with nozzle, and nozzle is opposite with the center of burning web, and the distance between nozzle and burning web are 15cm.
Aerosol cloud case of the simulated atmosphere pollutant emission into atmosphere includes: closed cabinet, and cabinet is
Cylinder, cylindrical both ends are respectively the arc of outwardly convex, and cabinet internal upper part is provided with temperature monitoring probe and humidity
Monitoring probe, temperature monitoring probe are electrically connected with the outer temperature indicator 18 of cabinet, humidity detection probe and the outer humidity display of cabinet
Device 20 is electrically connected, and cabinet internal upper part is additionally provided with humidifier 19, to providing moisture in cabinet.
Bottom is provided with blender 29 in cabinet, and blender is electrically connected with the motor outside cabinet, and motor driven blender turns
It is dynamic, vacuum pump 30 is provided with outside cabinet, vacuum pump connection vacuum tube simultaneously vacuumizes cabinet, and cabinet is provided with atmosphere pollution
Object input pipe is provided with check valve 17 on atmosphere pollution input pipe, and box house is provided with multiple black light lamps 33.Black light lamp is flat
Middle part is arranged in cabinet in row interval, and each black light lamp is electrically connected with the black light lamp switch outside cabinet, is additionally provided in cabinet
Optical inductor, optical inductor are electrically connected with the outer luminous intensity measurement instrument of cabinet.
The cabinet includes inner housing 21 and outer housing 35, and the cavity between inner housing and outer housing is divided into refrigeration
Agent circulation layer 22 and heat-barrier coating 23 are provided with gas test mouth 24, gas supplementing opening 25 and exhaust gas through inner housing and outer housing
Outlet 26；Check valve is set on gas test mouth 24, is provided with cleaning in cabinet middle part of sliding channel through inner housing and outer housing
Mouth 34 cleans and is provided with sealing cover 31 on mouth, and sealing cover is connect by sealing flange 33 with cleaning mouth, and seals cleaning mouth.It mends
The external blowdown pipe of port, blowdown pipe are connect with gas pump, and flow controller 13 and particulate filter 14 are provided on blowdown pipe.
Refrigerant circulation layer 22 is connect with the circulation line 27 outside cabinet, and circulating pump is provided on circulation line.Bottom outside the enclosure
It is provided with smog box support frame 28, the rotation of motor driven blender, the outer housing of smog box is Stainless Steel Shell, and inner housing is not
Become rusty steel sheel, and the Teflon anti-stick coating of 0.3mm is coated on the inner wall of inner housing, and the volume of smog box is 4-8m3, burning dress
The gas delivery tube set on bell is connected to the atmosphere pollution input pipe of aerosol cloud case, and the gas of aerosol cloud case is surveyed
Examination mouth is connect by conductive rubber pipe with online particulate matter chemical constituent mass spectrum 37.
Embodiment 2
Embodiment 1 measures the atmospheric aerosol smog systematic difference method of particulate matter chemical constituent, comprises the following steps that
1) the clean biomass of 5-15g is weighed, drying is placed on the burning web of burner and spreads out, and opens tonifying Qi
Pump inputs the air without particulate matter to furnace shell is burnt by tonifying Qi transfer tube, opens flue gas analyzer, observes spectrogram and record
CO、CO2Initial concentration, put biomass-burning, CO and CO provided by flue gas analyzer in real time during biomass combustion2's
Concentration value simultaneously calculates efficiency of combustion, adjusts tonifying Qi flow velocity by air supplying pump and guarantees that the efficiency of combustion of biomass is more than or equal to 0.9；
2) it is vacuumized by cabinet of the vacuum pump to aerosol cloud case, pressure in aerosol cloud case is made to reach 8-
12Pa closes vacuum pump, the check valve on atmosphere pollution input pipe is opened, by falling after the atmosphere pollution above burner
The mode of suction enters the atmospheric aerosol smog box of vacuum by gas delivery tube, check valve is closed after 4-6min, according to simulation
Atmosphere pollution in troposphere or even stratosphere actual environment background, adjust smog the temperature inside the box, humidity, intensity of illumination, lead to
Pressure in gas supplementing opening tonifying Qi adjusting tank body is crossed, turn on agitator stirring keeps internal mix uniform, after parameter stability, opens gas
Body tests mouth, and the matter by blaming fusibleness component in online particulate matter chemical constituent mass spectrometric measurement 0.04-1.0 micron particles object
Measure concentration and chemical composition.
Practical application example:
1. the preparation stage: the flue gas analyzer for simulating the burner of biomass open burning being connected zero pass filter, is adjusted
It is whole continue 2 minutes to " zeroing mode " after complete zeroing, starting air supplying pump to burner purge 6min；By flue gas analyzer tune
It is correctly connect with the testing tube of burner again after zero,
Before the use, aerosol cloud case need to close check valve, gas test mouth, gas supplementing opening, waste gas outlet, will clean
Mouth is covered tightly with sealing cover, and is tightened with sealing flange, guarantees air-tightness, opens vacuum pump 1 hour, tank body is vacuumized, and is opened
Refrigerant-cycle systems, by the refrigerant circulation layer of refrigerant (liquefied ammonia) injection smog box, according to the practical convection current of required simulation
Layer height by temperature monitoring probe set pot temperature (more than sea level with the every raising 100m of height, temperature reduces by 0.6 DEG C,
It is 17 DEG C of calculating with sea level environment temperature)；
2. working stage: being set after drying in oven 24 hours with balance precise 10.00g clean water rice straw
It is uniformly spread out at the round asbestos burning web of burner, device is sealed, guarantee the air-tightness of burner apparatus, and by gas
Body transfer tube is connected with the atmosphere pollution input pipe of aerosol cloud case；Air supplying pump is opened, it is empty to adjust flow controller control
Gas velocity is 9L/min, and air removes the particulate matter in air by high-efficiency particulate filter (HEPA), and transmits through tonifying Qi
The air of no particulate matter is passed through in combustion furnace furnace body by pipe；Moral figure testo350pro flue gas analyzer is opened, " CO, CO are adjusted to2
Measure and record data pattern ", observe spectrogram and CO, CO2Initial concentration；Rice straw sample is lighted using electric ignition device
Product, observe rice straw combustion case by transparent windows, start timing after 15 seconds and record data, pass through moral figure
CO, CO that testo350pro flue gas analyzer provides in real time2Concentration calculation agricultural crop straw efficiency of combustion, according to real-time
Agricultural crop straw efficiency of combustion adjusts mass flowmenter, adjusts charge flow rate when agricultural crop straw efficiency of combustion is less than 0.9, makes
Agricultural crop straw completely burned guarantees efficiency of combustion 0.9 or more；Agricultural crop straw sample combustion is observed by transparent windows
After, close air pump；
The check valve on atmosphere pollution input pipe is slowly opened, keeps the atmosphere pollution of agricultural crop straw sample combustion logical
It crosses gas delivery tube suck-back to enter in smog box, the check valve on atmosphere pollution input pipe is closed after five minutes, according to required wet
Degree opens humidifier humidifies and by humidity detection probe control humidity；According to required pressure, air pump tonifying Qi is opened, is adjusted
It saving mass flowmenter and controls air velocity, air removes the particulate matter in air by high-efficiency particulate filter (HEPA), and
Clean air gas supplementing opening is done to be passed through in smog box tank body；Black light lamp is opened, according to the uitraviolet intensity of required simulation, adjusts black light
The light radiation intensity of lamp；It opens magnetic stirring apparatus 1 hour, keeps internal mix equal by the flabellum uniform stirring of magnetic stirring apparatus
It is even；Gas test mouth is slowly opened, can be obtained by the on-line continuous measurement of online particulate matter chemical constituent mass spectrum (ACSM)
Biomass combustion generates the chemical constituent in particulate matter in simulated environment.
3. wash phase: simulation agricultural crop straw open burning to be done generates the sampling and measurement work of atmosphere pollution
Afterwards, gas test mouth is first closed, by refrigerant-cycle systems, the refrigerant of refrigerant (optional liquefied ammonia) extraction fog chamber is followed
Circular layer returns tank body and warms to room temperature；Air pump tonifying Qi is opened, makes tank body pressure recovery to normal pressure, then open outlet port, is led to
It crossing air pump the intracorporal exhaust gas of tank is discharged, then opens sealing cover, experimenter can enter smog box tank body by cleaning mouth, and
Inner wall is cleaned with 50vol.% aqueous alcohol, is finally blasted into tank and is done clean air and wait for testing use next time；Open combustion furnace
Bell takes out asbestos burning web and burning ashes collection tray, clears up agricultural crop straw sample combustion ashes, and use 50vol.%
Aqueous alcohol cleaning, to test use next time after drying.
Claims (10)
1. a kind of atmospheric aerosol smog system for measuring particulate matter chemical constituent, including being sequentially connected the simulation biomass connect dew
The aerosol cloud case into atmosphere of burner, simulated atmosphere pollutant emission of its burning, online particulate matter chemical constituent
Mass spectrum；
Aerosol cloud case of the simulated atmosphere pollutant emission into atmosphere includes at least: closed cabinet, is located at case
The blender of internal bottom, the vacuum pump for being vacuumized to closed cabinet, through the atmosphere pollution input pipe of cabinet, greatly
It is provided with check valve on gas pollutant input pipe, to the humidifier of offer moisture in cabinet, and is located in the box body the black light in portion
Lamp, the cabinet include inner housing and outer housing, and the cavity between inner housing and outer housing is divided into refrigerant circulation layer
And heat-barrier coating, inner housing and outer housing are provided with gas test mouth and gas supplementing opening；
Gas delivery tube on burner bell is connected to the atmosphere pollution input pipe of aerosol cloud case, aerosol cloud
The gas test mouth of case is connect by conductive rubber pipe with online particulate matter chemical constituent mass spectrum, online particulate matter chemical group sub-prime
Spectrum is the online particulate matter chemical constituent mass spectrum of ACSM, is provided with check valve on gas test mouth.
2. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 1, which is characterized in that institute
State burning furnace shell be the other end open at one end sealing structure, bell be arranged at combustion furnace shell nozzle end, bell with
Combustion furnace housing seal connects, and is provided with gas delivery tube at the top of bell, and gas delivery tube is connected to combustion furnace enclosure interior,
Burning web is horizontally arranged in burning furnace shell, the lower section of burning web is arranged in tonifying Qi transfer tube, and tonifying Qi transfer tube passes through combustion
It burns furnace shell to extend to outside shell and connect with air supplying pump, is provided with flow controller and particle on the pipeline of tonifying Qi transfer tube
Object filter makes tonifying Qi flow control in 4-10L/min by flow controller, it is preferred that and tonifying Qi flow velocity is 6-9L/min,
The top of burning web is provided with testing tube, and testing tube is extended to outside shell and connect with flue gas analyzer.
3. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 2, which is characterized in that
Sealing ring, combustion furnace shell nozzle end and bell is provided between combustion furnace shell nozzle end and bell to connect by the way that clips are fixed
It connects, burning furnace shell is cylindrical housings, and bell is inverted funnel shape, and the top funnel mouth and gas delivery tube of inverted funnel shape connect
It connects, bell open end internal diameter matches with combustion furnace shell nozzle end internal diameter, is provided on the shell on burning web top transparent
Observation window.
4. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 2, which is characterized in that combustion
Burning furnace shell height is 800-1200mm, and the inner sidewall of interior diameter 700-800mm, bell are coated with Teflon anti-stick coating,
The height of bell is 100-200mm, and bell bottom open end internal diameter is 700-800mm, and the inner sidewall of gas delivery tube is coated with
Teflon anti-stick coating, the interior diameter of gas delivery tube are 20-40mm.
5. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 2, which is characterized in that combustion
Burning net is round asbestos burning web, and the periphery of burning web is provided with rigid fixed frame, and the other end of rigid fixed frame is fixed on combustion
On the inner sidewall for burning furnace shell, outside the bottom of burning web setting electricity ignition device, electric ignition device and combustion furnace housing sidewall
Ignitor switch electrical connection, electric ignition device is close to burning sieve bottom, and the flue gas analyzer is moral figure testo350pro cigarette
Gas analyzer, particulate filter are highly effective air particulate matter (HEPA) filter, and the inner sidewall of tonifying Qi transfer tube is coated with
Teflon anti-stick coating, the interior diameter of tonifying Qi transfer tube are 10-30mm.
6. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 2, which is characterized in that
Bottom is provided with collection tray in burning furnace shell, and the tonifying Qi transmission tube end in burning furnace shell is provided with nozzle, sprays
Mouth is opposite with the center of burning web, and the distance between nozzle and burning web are 10-15cm.
7. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 1, which is characterized in that institute
The cabinet stated is cylinder, and cylindrical both ends are respectively the arc of outwardly convex, and cabinet internal upper part is provided with temperature monitoring
It pops one's head in and humidity detection probe, temperature monitoring probe is electrically connected with the outer temperature indicator of cabinet, outside humidity detection probe and cabinet
Middle part is arranged in cabinet in wetness display unit electrical connection, black light lamp parallel interval, and each black light lamp is opened with the black light lamp outside cabinet
Powered-down connection, is additionally provided with optical inductor in cabinet, and optical inductor is electrically connected with the outer luminous intensity measurement instrument of cabinet.
8. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 1, which is characterized in that pass through
It wears inner housing and outer housing and is provided with cleaning mouth in cabinet middle part of sliding channel, clean and be provided with sealing cover on mouth, sealing cover passes through
Sealing flange is connect with cleaning mouth, is realized sealing cover and is cleaned the sealed connection of mouth, the external blowdown pipe of gas supplementing opening, blowdown pipe and gas
Body pump connects, and is provided with flow controller and particulate filter on blowdown pipe, in lower box, runs through inner housing and outer housing
It is additionally provided with waste gas outlet.
9. the atmospheric aerosol smog system of measurement particulate matter chemical constituent according to claim 1, which is characterized in that system
Refrigerant cycle layer is connect with the circulation line outside cabinet, circulating pump is provided on circulation line, bottom is provided with outside the enclosure
Smog box support frame, blender are electrically connected with the motor outside cabinet, and motor driven blender rotation, the outer housing of smog box is not
Become rusty steel sheel, and inner housing is Stainless Steel Shell, and the Teflon anti-stick coating of 0.3mm, smog box are coated on the inner wall of inner housing
Volume be 4-8m3。
10. a kind of atmospheric aerosol smog systematic difference method for measuring particulate matter chemical constituent, comprises the following steps that
1) the clean biomass of 5-15g is weighed, drying is placed on the burning web of burner and spreads out, and opens air supplying pump, leads to
Tonifying Qi transfer tube is crossed to air of the furnace shell input without particulate matter is burnt, flue gas analyzer is opened, observes spectrogram and record CO, CO2
Initial concentration, put biomass-burning, CO and CO provided by flue gas analyzer in real time during biomass combustion2Concentration value
And efficiency of combustion is calculated, tonifying Qi flow velocity is adjusted by air supplying pump and guarantees that the efficiency of combustion of biomass is more than or equal to 0.9；
2) it is vacuumized by cabinet of the vacuum pump to aerosol cloud case, pressure in aerosol cloud case is made to reach 8-12Pa, closed
Vacuum pump is closed, the check valve on atmosphere pollution input pipe is opened, passes through the side of suck-back after the atmosphere pollution above burner
Formula enters the atmospheric aerosol smog box of vacuum by gas delivery tube, check valve is closed after 4-6min, according to the atmosphere of simulation
Pollutant adjusts smog the temperature inside the box, humidity, intensity of illumination, passes through tonifying Qi in troposphere or even stratosphere actual environment background
Pressure in mouth tonifying Qi adjusting tank body, turn on agitator stirring, keeps internal mix uniform, after parameter stability, opens gas test
Mouthful, and the mass concentration by blaming fusibleness component in online particulate matter chemical constituent mass spectrometric measurement 0.04-1.0 micron particles object
And chemical composition.
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Application publication date: 20190409 |