CN206787986U - A kind of particulate matter on-line monitoring system - Google Patents
A kind of particulate matter on-line monitoring system Download PDFInfo
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- CN206787986U CN206787986U CN201720306424.XU CN201720306424U CN206787986U CN 206787986 U CN206787986 U CN 206787986U CN 201720306424 U CN201720306424 U CN 201720306424U CN 206787986 U CN206787986 U CN 206787986U
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- particulate matter
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- line monitoring
- flow sensor
- monitoring system
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Abstract
The utility model discloses a kind of particulate matter on-line monitoring system, also include vavuum pump, automatic throttle, first flow sensor, drying device, heater, the second flow sensor for passing sequentially through pipeline connection including sampling head and monitoring device, between the sampling head and monitoring device；The first flow sensor, heater and second flow sensor are also connected by wire with governor circuit respectively, and the governor circuit is connected with monitoring device by wire with display；The system architecture is simple, can thoroughly eliminate in air steam to PM2.5Influence in measurement process, while ensure the continuous, stably of system testing, test process is easily controllable, and system is by the collection to particulate matter and adsorption function it is possible to prevente effectively from secondary pollution caused by test tail gas.The utility model PM suitable for air2.5On-line monitoring.
Description
Technical field
The utility model belongs to atmosphere particle monitoring field, is related to a kind of particulate matter on-line monitoring system.
Background technology
Current domestic atmospheric environment situation very severe, the especially PM in air2.5Have become Jiao of public attention
Point, PM2.5Refer to particulate matter of the diameter less than or equal to 2.5 microns in air, also referred to as lung particulate matter is (temporarily without in standard
Literary fame).Although PM2.5The simply seldom component of content in earth atmosphere composition, but it have to air quality and visibility etc. it is important
Influence.PM2.5Particle diameter is small, and residence time length, fed distance rich in substantial amounts of poisonous and harmful substances and in an atmosphere is remote, because
And the influence to health and atmosphere quality is bigger.
At present for Atmospheric Grains（PM2.5）Detection it is conventional have light scattering method, β attenuation sensors etc..
The principle of light scattering method is：Light beam from light source is irradiated to a certain space (measurement zone) containing candidate particles
Interior, so as to scatter, scattering light is changed into electric signal after photelectric receiver is changed, and after amplifier amplifies, can be dissipated according to light
Penetrate the mass concentration that theoretical calculation goes out measurement zone endoparticle thing.Light scattering method measurement is accurate, precision is high, reproducible, measurement speed
Degree is fast, is online direct reading measurement mode, without sampling, real-time continuous can provide the instantaneous value of particle concentration；But light scattering
Method is limited to the purity and particle size of particulate matter, and the species or particle size range of particulate matter change, and can all cause parameter value
Change, while the steam in wet flue gas can also be measured as particulate matter, so as to cause measured deviation.
The principle of β attenuation sensors is：When the beta ray that the beta source of one intensity constant is sent passes through medium, shellfish
Tower particle is absorbed with the mutual collision loss energy of electronics in medium.Under low-energy condition, degree of absorption depends on medium
Quality, granularity, composition, color and dispersity with powder dust particle etc. it is unrelated.β rays successively pass through cleaning filter paper (not
Collection dirt sample) and dirt sample filter paper (same filter paper) has been adopted, powder in environment is asked for by the difference of uptake according to 2 β rays
Dust concentration.β attenuation sensors are not by the influence of the factor such as dust species, granularity, decentralization, shape, color, gloss；It is powder
Accurate one kind in the indirect measurement method of dust concentration, when under high humidity environment in use, easily producing water in sampling process
Vapour is condensed, and the water droplet being condensed out is enriched on filter paper together with particulate matter, so as to cause measured deviation.
To sum up, because condensation vapor can cause fine particle（PM2.5）It is dissolved in water and loses, the accuracy to detecting data
Large effect is produced, and easily forms corrosive deposit and instrument and flue gas sampling pipeline is caused serious harm, while condensation method
Measurement can also be had an impact, therefore, the subject matter to be solved is steam in flue gas in fine particle e measurement technology in air
Condensation problem, more objectively reflect air by Particulate Pollution side degree, and how to ensure the continuous-stable in measurement process.
Utility model content
Above-mentioned in order to solve the problems, such as, the utility model provides a kind of particulate matter on-line monitoring system, the system architecture
Simply, steam can thoroughly be eliminated in air to PM2.5Influence in measurement process, while ensure continuous, steady in system testing
Fixed, test process is easily controllable, and the particulate matter tested effectively prevent the secondary pollution to air by collecting, filtering.
To achieve the above object, technical scheme is as follows used by the utility model：
A kind of particulate matter on-line monitoring system, including sampling head and monitoring device, between the sampling head and monitoring device
Also include passing sequentially through the vavuum pump of pipeline connection, automatic throttle, first flow sensor, drying device, heater, the
Two flow sensors；The first flow sensor, heater and second flow sensor also pass through wire and master control respectively
Circuit is connected, and the monitoring device is connected by wire with display.
As restriction of the present utility model：
The drying device includes the housing with closed chamber, and the housing is built with discoloration silica gel；
The heater includes the housing with closed chamber, is flowed from top to bottom according to air-flow in the housing suitable
Sequence is divided into upper chamber and lower chambers, and 3A types water molecules sieve is loaded in the upper chamber, and the filling of the water molecules sieve is high
It is 0.7g/m to spend for 10cm, heap density3；The lower chambers inwall is installed with heating tube, and the heating tube passes through wire and master control
Circuit connects；
The monitoring device is also connected with tail gas collecting device by pipeline；
Further limited as of the present utility model：
The tail gas collecting device includes the interior housing for setting chamber with gas outlet, enters in the housing along air-flow
Direction be sequentially provided with activated carbon granule layer, nonwoven layer and compound carbon fiber layer, the gas outlet is located at compound carbon fiber layer
Below, the activated carbon granule layer, nonwoven layer and compound carbon fiber layer along chamber short transverse extension and with housing
The seamless fixation of top surface and bottom surface.
Further limited as of the present utility model：The direction that the compound carbon fiber layer passes through according to air-flow is followed successively by
Carbon fiber block layer and carbon fiber carpet veneer.
A kind of particulate matter on-line monitoring system provided by the utility model, the system architecture is simple, can thoroughly eliminate big
Steam is to PM in gas2.5Influence in measurement process, while ensure continuous, stably in system testing, test process is easy to control
System, the particulate matter tested effectively prevent the secondary pollution to air by collecting, filtering.
The utility model PM suitable for air2.5Detection.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
In figure：1- sampling heads, 2- vavuum pumps, 3- automatic throttles, 4- first flow sensors, 5- drying devices, 6- add
Thermal, 7- second flow sensors, 8- monitoring devices, 9- tail gas collecting devices, 10- governor circuits, 0- displays.
Embodiment
A kind of particulate matter on-line monitoring system of embodiment
The present embodiment is a kind of particulate matter on-line monitoring system, as shown in figure 1, according to pipeline the order of connection it wrap successively
Sampling head 1, vavuum pump 2, automatic throttle 3, first flow sensor 4, drying device 5, heater 6, second flow is included to pass
Sensor 7 and monitoring device 8 and tail gas collecting device 9.Sampling head 1 is rotary-type sampling head, vavuum pump 2, automatic throttle 3,
One flow sensor 4, second flow sensor 7 and monitoring device 8 are existing device.In order to the gas gathered in system
The parameters such as the flow of body, humidity are controlled, and first flow sensor 4, heater 6 and second flow sensor 7 lead to respectively
Cross wire to be connected with governor circuit 10, circuit connecting mode, control mode and corresponding signal feedback system therein use
Prior art, for the ease of personnel's reading numerical values, monitoring device 8 is connected by wire with display 0, i.e.,：Can be real on display 0
When show monitoring information.
In the present embodiment, drying device 5 includes the housing with closed chamber, and housing passes through change built with discoloration silica gel
Absorption of the color silica gel to steam in gas, can remove the steam in air-flow, and the replacing of silica gel needs the discoloration according to silica gel
Changed.
Although drying device 5 can remove the steam in air-flow, in the case of airflow fluctuation, the degree of steam removing
It is different, and incomplete, in addition, discoloration silica gel, there is also the possibility of failure, and now, monitoring system is continuous fortune
Row state, it is impossible to detection is interrupted, therefore, in order to ensure reducing steam in air-flow, it is ensured that humidity reduces in air-flow, heater 6
Including the housing with closed chamber, the order flowed from top to bottom according to air-flow in housing is divided into upper chamber and lower chambers,
3A types water molecules sieve is loaded in upper chamber, water molecules sieve can further remove the steam in air-flow, and water molecules sieve is
Filling be highly 10cm, heap density is 0.7 g/m3；In order to ensure the effect that steam removes, the inlet and outlet point of upper chamber
Not She You the first humidity sensor and the second humidity sensor, when the registration of the first humidity sensor and the second humidity sensor refers to
When showing that difference is less than 10%, now the discoloration silica gel in drying device 5 is in effective status, when the first humidity sensor and second
When the registration instruction difference of humidity sensor is more than 10%, now, discoloration silica gel is in failure state, it is necessary to be changed；Cavity of resorption
Chamber interior walls are installed with heating tube, and after the upper chamber of drying device 5 and heater 6, the flow velocity of air-flow slows down, and lower chambers
Heating tube can heat air-flow, adjust the flow velocity of air-flow to be monitored, heating tube is connected by wire with governor circuit 10, heating tube
Prior art is used with the connected mode, control mode and feedback system of governor circuit 10.
After monitoring device 8 monitors, PM is contained in tail gas2.5, in order to avoid secondary pollution, monitoring device 8 is gone back and tail gas
Collection device 9 is connected by pipeline；Tail gas collecting device 9 includes the housing with inner cavity chamber with gas outlet, housing interior edge
The direction for air-flow entrance is sequentially provided with activated carbon granule layer, nonwoven layer and compound carbon fiber layer, and gas outlet is located at composite carbon
After fibrous layer, activated carbon granule layer, nonwoven layer and compound carbon fiber layer along chamber short transverse extension and with housing
The seamless fixation of top surface and bottom surface, activated carbon granule layer are to be formed after can spraying carbon particle by the two sides of the froth bed of air-flow
Activated carbon granule layer, the direction that compound carbon fiber layer passes through according to air-flow are followed successively by carbon fiber block layer and carbon fiber carpet veneer, and carbon is fine
It is carbon fiber block to tie up block layer（Carbon fiber block is fritter of the carbon fiber layer after tear, volume 6cm3）It is loose to stack what is formed
Layer structure, thickness 2cm, the thickness of carbon fiber carpet veneer is 3cm, can be periodically to activated carbon granule layer, nonwoven layer and compound
Carbon fiber layer is changed.
Concrete operating principle is：After sampling head 1 gathers the gas in air, pass through certainly under the swabbing action of vavuum pump 2
The dynamic regulation of choke valve, first flow sensor 4 to flow, gas enters in drying device 5, due to first flow sensor 4
It is connected with governor circuit, governor circuit controls first flow sensor 4 by transmission signal, and first flow sensor 4 again will letter
Number feed back in automatic throttle 3, so as to realize the regulation to gas flow.
Gas enters in drying device 5, due to containing steam, therefore the silica gel discoloration in drying device in gas, now
Gas enters in the upper chamber in heater 6 via pipeline, further removes the steam in gas, it is ensured that the steam in air-flow
Do not influence PM2.5Monitoring.After gas enters lower chambers in upper chamber, due to the heating of heating tube, it can adjust it and enter monitoring dress
The flow velocity in 8 is put, the heating-up temperature of heating tube can be controlled according to governor circuit.It is laggard that under test gas enters monitoring device 8
Row monitoring, because monitoring device 8 is connected with display 0 by circuit, therefore its related Monitoring Data can be transmitted to display
On, it is easy to people to read.
Finally the tail gas from monitoring device 8 out is entered in tail gas collecting device 9 by pipeline, and the device is three sections of mistakes
Filter, the gas after filtering is fresh free of contamination air, can directly be discharged.
A kind of particulate matter on-line monitoring system that the present embodiment provides, it is simple in construction, it can thoroughly eliminate steam pair in air
PM2.5Influence in measurement process, while ensure continuous, stably in system testing, test process is easily controllable, has tested
Particulate matter effectively prevent the secondary pollution to air by collecting, filtering.
Above-described embodiment, only it is preferred embodiment of the present utility model, is not its that made to the utility model
The restriction of its form, any person skilled in the art are changed or changed as enlightenment possibly also with above-mentioned technology contents
Type is the equivalent embodiment of equivalent variations.In every case it is the technical spirit without departing from the utility model claims, implements to more than
Simple modification, equivalent variations and remodeling made by example, still fall within the scope of the utility model claims protection.
Claims (6)
1. a kind of particulate matter on-line monitoring system, including sampling head（1）And monitoring device（8）, it is characterised in that：The sampling head
（1）And monitoring device（8）Between also include pass sequentially through pipeline connection vavuum pump（2）, automatic throttle（3）, first flow
Sensor（4）, drying device（5）, heater（6）, second flow sensor（7）；The first flow sensor（4）Plus
Thermal（6）With second flow sensor（7）Also pass through wire and governor circuit respectively（10）Connection, the monitoring device（8）
Pass through wire and display（0）It is connected.
A kind of 2. particulate matter on-line monitoring system according to claim 1, it is characterised in that：The drying device（5）Bag
The housing with closed chamber is included, the housing is built with discoloration silica gel.
A kind of 3. particulate matter on-line monitoring system according to claim 1, it is characterised in that：The heater（6）Bag
The housing with closed chamber is included, the order flowed from top to bottom according to air-flow in the housing is divided into upper chamber and cavity of resorption
Room, 3A types water molecules sieve is loaded in the upper chamber, the filling of the water molecules sieve highly is 10cm, and heap density is 0.7
g/m3；The lower chambers inwall is installed with heating tube, and the heating tube passes through wire and governor circuit（10）Connection.
4. according to a kind of particulate matter on-line monitoring system described in claim 1, it is characterised in that：The monitoring device（8）
Also with tail gas collecting device（9）It is connected by pipeline.
5. according to a kind of particulate matter on-line monitoring system described in claim 4, it is characterised in that：The tail gas collecting device
（9）Including being sequentially provided with activated carbon with the housing that chamber is set in gas outlet, the interior direction entered along air-flow of the housing
Stratum granulosum, nonwoven layer and compound carbon fiber layer, the gas outlet are located at after compound carbon fiber layer, the activated carbon granule
Layer, nonwoven layer and compound carbon fiber layer along chamber short transverse extension and it is seamless solid with the top surface of housing and bottom surface
It is fixed.
A kind of 6. particulate matter on-line monitoring system according to claim 5, it is characterised in that：The compound carbon fiber layer is pressed
Carbon fiber block layer and carbon fiber carpet veneer are followed successively by according to the direction that air-flow passes through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720306424.XU CN206787986U (en) | 2017-03-28 | 2017-03-28 | A kind of particulate matter on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720306424.XU CN206787986U (en) | 2017-03-28 | 2017-03-28 | A kind of particulate matter on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206787986U true CN206787986U (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720306424.XU Expired - Fee Related CN206787986U (en) | 2017-03-28 | 2017-03-28 | A kind of particulate matter on-line monitoring system |
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| CN (1) | CN206787986U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881251A (en) * | 2021-01-18 | 2021-06-01 | 河北宙清环保科技有限公司 | Detection device and detection method for concentration of atmospheric particulate matter |
-
2017
- 2017-03-28 CN CN201720306424.XU patent/CN206787986U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881251A (en) * | 2021-01-18 | 2021-06-01 | 河北宙清环保科技有限公司 | Detection device and detection method for concentration of atmospheric particulate matter |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171222 Termination date: 20180328 |
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