CN208736796U - It is a kind of directly to measure formula gaseous pollutant emission monitoring device - Google Patents
It is a kind of directly to measure formula gaseous pollutant emission monitoring device Download PDFInfo
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Abstract
Formula gaseous pollutant emission monitoring device is directly measured the utility model discloses a kind of, including testing agency, interrupter, extraction sector, calibrating device, blowing mechanism and central processing module, testing agency includes spectral detection module and sensing chamber, interrupter includes admission line and smoke valve, admission line and smoke valve are arranged in flue, smoke filtration cover is arranged with outside admission line entrance, filter is equipped in admission line, admission line pipe shaft is communicated with standard gas pipeline, purging pipeline is communicated in smoke filtration cover, gas flow controller is equipped in pump-line；The utility model being capable of detection for gaseous contaminants accuracy, and it effectively solves tradition and directly measures the problems such as overproof when field calibration result existing for formula detection device is overproof, environment monitoring compares, and operation is convenient, it occupies little space, simultaneously, additionally it is possible to accurately measure, calculate the oxygen-containing concentration of emission of gaseous pollutant benchmark of flue gas.
Description
Technical field
The present invention relates to gaseous pollutant technical field of measuring equipment, more particularly to a kind of directly measurement formula gaseous pollutant
Emission monitoring device.
Background technique
Currently, the increasing with China to environment non-environmental-pollution management, national departments concerned has been formulated stringent
Atmosphere pollutants emission standards, in newest environment protectment protection " stationary source flue gas (SO2, NOX, particulate matter) discharge connect
Continuous monitoring system specifications and detection method " in (HJ 76-2017), specify that gas pollutant CEMS(flue gas emission is continuous
Monitoring system) type include complete extraction method, the direct method of measurement and dilution three kinds of extraction method.Due to the office of current detection technology
Sex-limited, the especially restriction of the detection technique of the gaseous pollutant concentration of emission containing particulate solid, China is existing at present
CEMS cannot be quickly detected from fixed pollution source smoke discharge situation, be primarily present following problem:
One, complete extraction method and dilution extraction method are extraction-type CEMS, and extraction-type CEMS is now the most commonly used one
Kind detection method, can accurately detect fixed pollution source smoke discharge situation, and still, extraction-type CEMS lag time is long,
For example, for thermal power plant denitration CEMS, a length of 8 seconds or so when the reaction that flue gas is exported from ammonia-gas spraying device to denitration, actual motion
In, measurement result than the practical flue gas pollutant state parameter of sample point lag about 220S or even longer, and China is newest
Environment protectment protection " stationary source flue gas (SO2, NOX, particulate matter) the continuous Specifications of Monitoring Technology of discharge " (HJ 75-2017)
In can only also be distinctly claimed calibrating gas verification when gas pollutant CEMS system response time≤200 second.When because of lag
Between it is too long, at present the country thermal power plant existing environmental protection equipment cannot achieve automatic adjustment, manual adjustment side can only be used
Formula, and due to the long reason manual adjustment of lag and it is unreliable, effect is poor, cause that environmentally friendly parameter is frequently exceeded, spray ammonia is superfluous,
Cause the subsequent equipment cisco unity malfunction of denitration, causes air preheater blocking, deduster failure to cause compressor emergency shutdown, neither
Environmental protection, it is also not energy-efficient, and security risk is very big.
Based on current existing CEMS technology, substantially manually operation is completed for adjustment, the control of environmental protection equipment, environmental protection administration
Also it can only provide that NOx average value cannot be exceeded in a hour, and power environment protection detection department provides environmentally friendly parameter in one hour
No more than 15 times, even under the standard of " the relaxing ", the environmentally friendly parameter of the unit of gaseous contamination source monitoring also frequent frequency
It is numerous to exceed this standard requirements.
Two, the CEMS of directly measurement formula is in a kind of blowdown place method measured directly, and spectrum detection device is directly pacified
It is attached at measuring point, flue gas is directly detected, detection speed is fast, is conducive to adjust environmental protection equipment, is conducive to control and prevention gaseous contamination
The environmentally friendly parameter of object is not exceeded.But existing direct measurement formula measuring technique and device are not able to satisfy environmental protection tests and want at present
It asks, it is frequently overproof when carrying out on-site test comparison to the CEMS of existing direct measuring according to by environmentally friendly related request, it is right
The CEMS of existing direct measuring is usually overproof when being calibrated, and does not meet environmental protection tests requirement.It is supervised now with environmental protection
That looks into puts more effort, and the higher gaseous contamination source of the content of each thermal power plant and particulate solid monitors unit, all washes in a pan
The CEMS for having eliminated direct measurement formula is replaced, the CEMS manufacturer of import brand with extraction-type and the CEMS of dilution sampling formula
The CEMS for meeting the direct measurement formula of environmental protection tests requirement can be provided.
Existing direct measurement formula gas pollutant measuring technique causes existing due to there is the technical bottleneck for being difficult to overcome
The basic function of direct measurement formula gas pollutant measuring device do not meet environmental protection tests requirement, and technical bottleneck mainly includes
Following several respects:
(1) environment locating for measuring point is extremely disliked when the CEMS device progress gaseous pollutant of directly measurement formula continuously monitors
It is bad, it is spent for example, the temperature of the flue gas of thermal power plant's denitration CEMS measuring point is up to 370 more, and dust-laden is larger, for example, de- using wet process
The smoke moisture of sulphur is larger, and CEMS device is affected by environment.The detection probe of the directly CEMS device of measurement formula is mounted directly to
In flue, when using standard gas to CEMS device normalization, standard gas enters flue gas inspection channel, and standard gas is mixed with flue gas, calibration
When to enter the gas of sense channel be that the uncertain standard gas of mixed proportion mixes with flue gas gas rather than standard gas, calibrate
The result is that uncertain, when directly resulting in environmentally friendly field calibration, calibration result is overproof, does not meet environmental protection supervision cigarette requirement；Therefore
The CEMS device of directly measurement formula generally uses following methods to demarcate: insertion and the similar filter of pollutant absorption characteristic in the optical path
Light microscopic piece or " material object " eyeglass calculate calibration result using operation, not because of eyeglass and eyeglass in kind and standard gas detected status
Unanimously cause environmentally friendly live contrastive detection result overproof.
(2) existing direct measurement formula measuring technique and device be in environmentally friendly live contrasting detection test, newly into it is micro
Flue gas was mixed with the flue gas of the upper period in filter interior sluggishness space, and mixed flue gas enters Yang Qi sensing chamber,
As a result the instantaneous and real-time concentration that gaseous pollutant cannot be characterized, cannot detect the maximum value of gaseous pollutant；It is right with environmental protection
It is overproof when being compared than the master meter testing result of monitoring, it is not able to satisfy environmental protection tests requirement.
(3) the environmental protection minimum discharge of national requirements at present, the detection accuracy of CEMS will be able to satisfy minimum discharge requirement；It is existing
It directly measures formula gas pollutant measuring technique and the range of device is all larger, be not able to satisfy the requirement of minimum discharge detection accuracy.
The light that spectrum analysis is emitted is longer in the indoor stroke of detection, then the accuracy of spectrum analysis is higher, increases light and is examining
It surveys indoor stroke and is just able to satisfy minimum discharge testing requirements, but if directly increasing the length of Yang Qi sensing chamber, long-term high
Under the working environment of temperature, nature creep and sag bent occur for sensing chamber, influence the normal optical path of light, the stability of instrument compared with
Difference；Meanwhile directly measurement formula measuring device need to be tested at the scene, the increase of sensing chamber's length will cause the increase of volume,
It is not easy to execute-in-place.
It (4) need to be according to actual measurement oxygen content according to the concentration of emission of " fossil-fuel power plant atmospheric pollutant emission standard " gaseous pollutant
It is converted to benchmark oxygen content concentration, environmental protection administration is examined by the benchmark oxygen content concentration of gaseous pollutant；It directly surveys at present
Different positions is arranged in the measuring point of amount type gaseous pollutant emission monitoring device, the measuring point of oxygen content concentration detection apparatus, and
Independent detection, and due to current existing direct measurement formula gaseous pollutant emission monitoring device, measurement of oxygen content device itself
Basic function just do not meet environmental protection tests requirement, cause the gaseous pollutant detected content and gaseous pollutant oxygen amount
Value is within the same period, the oxygen-containing concentration of emission of benchmark for the gaseous pollutant that cannot accurately calculate sample gas.
In conclusion although the CEMS for directly measuring formula has many advantages, such as that there are in terms of above-mentioned basic function
Problem causes to be unable to reach environmental protection tests requirement, therefore, how to solve existing superseded direct measurement formula gaseous contamination
The technical bottleneck of object measuring technique designs the direct measurement formula gas pollutant monitoring device for meeting environmental protection tests requirement
CEMS meets environmental protection equipment operation adjust automatically needs, realizes the perfection of the automatic control of environment monitoring and environmental protection equipment operation
In conjunction with, be of great significance to disposal of pollutants analyte detection, control field, and the detection technique in the field can be brought it is great into
Step.
Summary of the invention
Formula gaseous pollutant emission monitoring device is directly measured the object of the present invention is to provide a kind of, it being capable of gaseous pollutant
Accuracy in detection, and effectively solve the problems, such as that overproof big and sample gas purity existing for traditional directly measurement formula detection device is low, it mentions
High measurement accuracy, and operation is convenient, occupies little space, simultaneously, additionally it is possible to the gaseous pollutant benchmark for accurately calculating sample gas contains
Oxygen concentration of emission.
The technical solution adopted by the present invention are as follows:
A kind of directly measurement formula gaseous pollutant emission monitoring device, including testing agency, interrupter, extraction sector,
Calibrating device, blowing mechanism and central processing module；
Testing agency includes sensing chamber, be equipped on the left of sensing chamber with the spectral detection module that be connected to inside sensing chamber, detect
Interior is equipped with principal reflection mirror, and spectral detection module is oppositely arranged with principal reflection mirror；The spectral detection module includes light source module
With spectrum acquisition analysis module；
Interrupter includes the admission line of communication with detection room right end and the smoke valve of admission line inlet is arranged in, into
Feed channel and smoke valve are arranged in flue, and smoke filtration cover is arranged with outside admission line entrance, is equipped with filtering in admission line
Device；
Extraction sector includes pump-line, extraction valve and aspiration pump, pump-line entrance communication with detection room left part, pumping
Pipe outlet connects aspiration pump, and extraction valve is arranged in pump-line；
Calibrating device includes standard gas pipeline and the standard gas intake valve that is arranged on standard gas pipeline, the connection of standard gas pipeline air-inlet end
External perimysium reference gas source, standard gas pipeline outlet side are connected to admission line, and standard gas pipeline outlet side is between smoke valve and filter；
Blowing mechanism includes purging pipeline, the purging gentle body flow controller of intake valve, and purging pipeline inlet end connection is outer
Ministerial standard gas source, scavenging conduit road outlet side are protruded into flue and are connected to inside smoke filtration cover, and purging intake valve is arranged in scavenging conduit
On road, gas flow controller is arranged on pump-line；
Light source module controlled end connects the light source control end of central processing module, and the communication terminal of spectrum acquisition analysis module connects
The spectrum analysis communication terminal of central processing module is connect, gas flow controller communication terminal connects the communication of central processing module flow
End, central processing module are evacuated control terminal and connect aspiration pump controlled end.
In order to reduce decaying when light transmission, spectral detection precision is improved, further, the light source module passes through hair
Fiber unit communication with detection room is penetrated, the spectrum acquisition analysis module passes through mirror based fiber optica unit communication with detection room, launching fiber
Unit is arranged between light source module and principal reflection mirror, and mirror based fiber optica unit is arranged in principal reflection mirror and spectrum acquisition analysis module
Between；Launching fiber unit includes diversing lens and transmitting light-conductive optic fibre, and diversing lens and transmitting light-conductive optic fibre are along light source module
Emit and set gradually to the optical path direction of principal reflection mirror, mirror based fiber optica unit includes mirror lens and reflection light optical fiber, reflection
Lens and reflection light optical fiber are set gradually along the optical path direction that principal reflection mirror is reflected towards spectrum acquisition analysis module.
Indoor distance is being detected in order to increase light in the case where not lengthening sensing chamber's length, it is further, described
Detection interior is additionally provided with subreflector, and subreflector is located on the left of principal reflection mirror and is oppositely arranged with principal reflection mirror.
In order to comprehensively consider pressure and temperature effect in spectrum analysis, accuracy of analysis, further, the inspection are improved
Surveying mechanism, to further include setting detecting indoor temperature sensor and pressure sensor, temperature sensor and pressure sensor it is defeated
Outlet is separately connected spectrum acquisition analysis module signal input part.
It further include that setting exists further in order to realize the detection of oxygen concentration in sample gas in same set of equipment
Oxygen detection module on pump-line, oxygen detection module output end connect the detection signal input part of central processing module；
When the gas pollutant content in high-temperature sample gas detects in testing agency, oxygen detection module is to the oxygen content with equally gas
Directly detected, testing agency carry out standard gas calibration when, standard gas enter simultaneously oxygen detection module to oxygen detection module into
Rower is fixed.
Further, the admission line is equipped with NOXConverter, NOXConverter is arranged in standard gas pipeline outlet side and mistake
Between filter.
Further, the smoke valve uses check-valves or stock control valve.
Further, the aspiration pump is using air ejector of emanating, and air ejector of emanating is equipped with compressed air inlet, sample gas is taken out
Suction inlet and the outlet of sample gas, compressed air inlet are connected to external air source, and sample gas pump orifice is connected to exhaust tube, sample gas outlet outlet
Pipeline, outlet pipe are connected to inside flue.
Further, the light of the light source module transmitting is ultraviolet light.
Root further, when being demarcated with standard gas, open, and smoke valve is closed, in standard gas and filter mantle by standard gas intake valve
Flue gas isolation, flue gas not can enter admission line and mixes with standard gas, and standard gas will not leak into flue from admission line.
The invention has the following advantages:
(1) by setting interrupter, when sample gas enters sensing chamber by admission line, smoke valve is opened, and guarantees flue gas stream
Logical normal, when carrying out standard gas calibration, sensing chamber's smoke valve is closed, when realizing standard gas and demarcating, calibrating gas and flue gas it is complete
Isolation has kept away and has exempted from sample gas and be mixed into standard gas to cause calibration inaccuracy, guaranteed the accuracy of calibration result, environmentally friendly scene is made to carry out sample
Calibration result is accurate and unique when gas is demarcated, and then guarantees that the utility model can satisfy the requirement of environmental protection tests；
(2) structure for protruding into sample gas filter mantle in flue and by admission line is set by the way that smoke filtration to be provide with, protected
While barrier increases filtering traffic, prevent resistance from having an impact to sample throughput, meanwhile, admission line is arranged in smoke filtration
In cover, filter mantle internal gas sluggishness space is had compressed；
(3) it by setting blowing mechanism, detects that the gas flow of pump-line is less than in gas flow controller and limits
Blowback cleaning is carried out to smoke filtration cover in time when threshold value, avoiding smoke filtration from covering on, long-time service is lower to be blocked and then influence sample
Throughput further ensures sample gas detection accuracy, meanwhile, blowing mechanism cooperates the use of smoke valve, gas when can be avoided purging
Body, which flows into sensing chamber and makes to detect indoor gas mixing, causes sample gas testing result inaccurate；
(4) by the way that optical link module is arranged between spectral detection module and sensing chamber, not only by spectral detection module
It is isolated between sensing chamber, avoids detecting indoor high-temperature gas damage spectral detection module, ensure equipment safety using simultaneously
Service life of equipment is improved, while reducing the decaying in light transmission, guarantees the accuracy of Spectroscopic analysis results；
(5) by setting subreflector, the light source for launching light source module passes through between reflecting mirror and subreflector
Spectrum acquisition analysis module is entered back into after multiple reflections, under the premise of not increasing sensing chamber's length, increases light and is detecting
Light path in the sample gas of room, improves detection accuracy of the invention；
(6) by the way that oxygen detection module resistant to high temperature is arranged, keep sample gas oxygen-containing with regard to directly carrying out without processing such as coolings
Measurement makes the gaseous pollutant content of detection and participates in the actual oxygen magnitude of the oxygen-containing concentration of emission conversion of benchmark in the same period
It is interior, and can be realized to synchronize when calibrating detection for gaseous contaminants apparatus function and lambda sensor is calibrated, convenient for more accurately counting
Calculate the oxygen-containing concentration of emission of benchmark of pollutant in sample gas.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment one；
Fig. 2 is the structural schematic diagram of embodiment one in a state of use；
Fig. 3 is the structural schematic diagram of embodiment two；
Fig. 4 is the structural schematic diagram of embodiment two in a state of use；
Fig. 5 is the structural schematic diagram of embodiment three
Fig. 6 is the structural schematic diagram of embodiment three in a state of use；
The structural schematic diagram of Fig. 7 example IV；
Fig. 8 is the structural schematic diagram of example IV in a state of use.
Description of symbols:
1, sensing chamber；2, spectrum acquisition analysis module；3, light source module；4, extraction valve；5, pump-line；6, gas flow
Controller；7, aspiration pump；8, intake valve is purged；9, pipeline is purged；10, standard gas pipeline；11, standard gas intake valve；12, smoke filtration
Cover；13, principal reflection mirror；14, check-valves；15, admission line；16, filter；17, mounting flange；18, walling of flue；19, NOx turns
Parallel operation；20, subreflector；21, temperature sensor；22, pressure sensor；23, launching fiber unit；24, stock control valve；
25, launching fiber unit；26, sealing sleeve pipe；27, outlet pipe；28, oxygen detection module.
Specific embodiment
The present invention includes testing agency, interrupter, extraction sector, calibrating device, blowing mechanism and central processing module；
Testing agency includes sensing chamber 1, is equipped on the left of sensing chamber 1 and the spectral detection module that is connected to inside sensing chamber 1, inspection
It surveys and is equipped with principal reflection mirror 13 in room 1, spectral detection module is oppositely arranged with principal reflection mirror 13；The spectral detection module includes light
Source module 3 and spectrum acquisition analysis module 2；
Interrupter includes the admission line 15 of 1 right end of communication with detection room, and admission line 15 protrudes into the setting of walling of flue 18 and exists
In flue, and 15 inlet of admission line is arranged with smoke filtration cover 12, successively sets in admission line 15 along air current flow direction
There are smoke valve and filter 16, filter 16 uses nonplanar convex-concave structure, increased tolerance；The smoke valve uses non-return
Valve 14 or stock control valve 24；
Extraction sector includes pump-line 5, and 5 entrance communication with detection room of pump-line, 1 left part, the outlet of pump-line 5 is set
There is aspiration pump 7, is equipped with extraction valve 4 in pump-line 5；
Calibrating device includes standard gas pipeline 10 and the standard gas intake valve 11 that is arranged on standard gas pipeline 10, standard gas pipeline 10 into
Gas end is connected to external perimysium reference gas source, and 10 outlet side of standard gas pipeline is connected to admission line 15, and 10 outlet side of standard gas pipeline is located at flue gas
Between valve and filter 16；
Blowing mechanism includes purging pipeline 9, purging intake valve 8 and gas flow controller 6, and purging 9 inlet end of pipeline connects
Logical external perimysium reference gas source, purging 9 outlet side of pipeline are protruded into flue and are connected to inside smoke filtration cover 12, and purging intake valve 8 is arranged
On purging pipeline 9, gas flow controller 6 is arranged on pump-line 5；
3 controlled end of light source module connects the light source control end of central processing module, the communication terminal of spectrum acquisition analysis module 2
The spectrum analysis communication terminal of central processing module is connected, it is logical that 6 communication terminal of gas flow controller connects central processing module flow
End is interrogated, central processing module is evacuated control terminal and connects 7 controlled end of aspiration pump.
For a better understanding of the present invention, technical scheme is described further with reference to the accompanying drawing.
Embodiment one:
As depicted in figs. 1 and 2, the present embodiment includes testing agency, interrupter, extraction sector, calibrating device, purging machine
Structure and central processing module；
Testing agency includes sensing chamber 1, and 1 right end of sensing chamber protrudes into flue and sensing chamber 1 is fixed by mounting flange 17
On walling of flue 18,1 left end of sensing chamber is connected to extraction sector, and 1 right end of sensing chamber is respectively communicated with interrupter and calibrating device.Inspection
The spectral detection module for being equipped with and being connected to inside sensing chamber 1 is surveyed on the left of room 1, and spectral detection module includes light source module 3 and spectrum
Receive analysis module 2, be equipped with principal reflection mirror 13 in sensing chamber 1, principal reflection mirror 13 be located at 1 right end of sensing chamber and with spectral detection mould
Block is oppositely arranged, and principal reflection mirror 13 preferably uses three angle mirrors.Wherein, spectrum acquisition analysis module 2 includes for receiving reflected light
The laser pick-off module of line and analyzer for carrying out spectrum analysis.
Interrupter is arranged in flue and for being filtered to sample gas, and interrupter includes 1 right end of communication with detection room
Admission line 15,15 inlet of admission line is arranged with smoke filtration cover 12, and 15 entrance of admission line positioned at right end is set
There is flue gas hair, smoke valve uses electrically-controlled valve or the check-valves 14 with one-way flow function, and the present embodiment preferably uses non-return
Valve 14, the circulating direction of check-valves 14 are that is, consistent with sample gas circulating direction, the air inlet positioned at 14 left side of check-valves from right to left
Filter 16 is equipped in pipeline 15.
Smoke filtration cover 12 preferably uses radial section for the metal powder sintered filter element of ellipse, oval under same volume
Type column structure has bigger surface area, therefore can effectively increase the filter area of smoke filtration cover 12, makes smoke filtration
Cover 12 ventilatory capacity can reach 0.8L/min, in this way can under the premise of not increasing resistance, increase smoke filtration cover 12 surface area,
Increase through-current capacity, simultaneously, moreover it is possible to reduce 16 internal gas sluggishness space of filter.
By using smoke filtration cover 12 made of metal powder sintered filter element, and section by smoke filtration cover 12 radially
Face is set as non-circular, do not increase 12 internal volume of smoke filtration cover under the premise of, so that it may increase 12 table of smoke filtration cover
Area, increase sample air-flow flux, guarantee newly into a large amount of flue gases the gas in sluggish space all can be cemented out rapidly,
Make gas in sensing chamber 1 it is all newly into flue gas, and then guarantee that testing result is capable of the instantaneous of accurate characterization gaseous pollutant
And real-time concentration, so that the utility model is consistent when carrying out environmentally friendly contrastive detection with master meter testing result, it is full
The requirement of sufficient environmental protection tests；
Extraction sector includes pump-line 5, and 5 entrance communication with detection room of pump-line, 1 left part, the outlet of pump-line 5 is set
There is aspiration pump 7, is equipped with extraction valve 4 in pump-line 5；
Calibrating device includes standard gas pipeline 10 and the standard gas intake valve 11 that is arranged on standard gas pipeline 10, standard gas pipeline 10 into
Gas end is connected to external perimysium reference gas source, and 10 outlet side of standard gas pipeline is connected to admission line 15, and 10 outlet side of standard gas pipeline is located at non-return
Between valve 14 and filter 16；
Blowing mechanism includes purging pipeline 9, purging intake valve 8 and gas flow controller 6, and purging 9 inlet end of pipeline connects
Logical external perimysium reference gas source, purging 9 outlet side of pipeline are protruded into flue and are connected to inside smoke filtration cover 12, and purging intake valve 8 is arranged
On purging pipeline 9, gas flow controller 6 is arranged on pump-line 5.
3 controlled end of light source module connects the light source control end of central processing module, the communication terminal of spectrum acquisition analysis module 2
The spectrum analysis communication terminal of central processing module is connected, it is logical that 6 communication terminal of gas flow controller connects central processing module flow
End is interrogated, central processing module is evacuated control terminal and connects 7 controlled end of aspiration pump.
The working principle of embodiment one are as follows:
When sample gas detects, extraction valve 4 and aspiration pump 7 are opened, and standard gas intake valve 11 and purging intake valve 8 are closed, flue gas mistake
Negative-pressure sucking is generated in filter bowl 12, the sample gas in flue enters smoke filtration cover 12, filter out after the solid particulate matter in flue gas according to
It is secondary after returning valve 14, admission line 15 and filter 16, it is clean to contain gas pollutant SO2、NOXSample gas pass through detection
Room 1 enters sensing chamber 1 and carries out spectral detection, is discharged subsequently into pump-line 5, gas flow controller 6, and by aspiration pump 7.
The spectral-analysis process of the present embodiment are as follows: the light that light source module 3 issues ultraviolet band enters sensing chamber 1, light
Enter spectrum acquisition detection module after the reflection of principal reflection mirror 13, due to the SO in sample gas2、NOXIt can 1 light of absorption detecting room
In characteristic wave bands, 2 pairs of spectrum acquisition analysis module absorbed by gas pollutant after light spectrum carry out analysis obtain gas
Body pollution object concentration.
Preferably using integrated spectrum acquisition module and spectroanalysis instrument, spectrum acquisition module receives anti-spectral detection module
Irradiating light beam carries out gaseous pollutant analysis by spectrometer.
When standard gas is demarcated, extraction valve 4 and standard gas intake valve 11 are opened, and aspiration pump 7, purging intake valve 8 are closed, in standard gas pressure
Under power effect, standard gas enters standard gas pipeline 10, and since smoke valve uses check-valves 14, check-valves 14 is closed under the effect of standard gas pressure
It closes, standard gas will not leak into flue from admission line 15, and flue gas is closed due to check-valves 14 without can enter admission line 15；
Standard gas enters sensing chamber 1 after filter 16, and spectral detection module carries out spectrum analysis and carries out parameter calibration, and standard gas finally flows
It is discharged through pump-line 5 and gas flow controller 6.Interval of calibration is according to " stationary source flue gas (SO2, NOX, particle
Object) the continuous Specifications of Monitoring Technology of discharge " (HJ 75-2017) requirement setting, once per interior at least automatic Calibration calibration for 24 hours.
Spectrum analysis and the process for carrying out parameter calibration are as follows: the ultraviolet band light that light source module 3 issues enters sensing chamber
1, spectral detection module, the SO in calibrating gas are entered after the reflection of principal reflection mirror 132、NOXIn 1 light of absorption detecting room
Characteristic wave bands, spectral detection module analyze the spectrum of the light after being absorbed by gas pollutant, obtain calibrating gas
Pollutant concentration, then the indicating value of adjustment spectrum acquisition analysis module 2, makes 2 indicating value of spectrum acquisition analysis module and standard value one
It causes, completes calibration process.
It is detected in above-mentioned sample gas and in the process, gas flow in 6 real-time detection pump-line 5 of gas flow controller,
When flow value, which is less than, limits threshold value, it was demonstrated that stopping state occurs in smoke filtration cover 12, at this point, extraction valve 4, aspiration pump 7, standard gas
Intake valve 11 is turned off, and purging intake valve 8 is opened, and external compression gas source enters inside smoke filtration cover 12 via purging pipeline 9,
And smoke filtration cover 12 is purged from inside to outside, remove 12 surface dirt of smoke filtration cover.The value of flow restriction threshold value need to ensure
Stablized by the flue gas flow of monitoring device, while meeting " the continuous prison of stationary source flue gas (SO2, NOX, particulate matter) discharge
Examining system technical requirements and detection method " " influence of the sample introduction changes in flow rate " technical indicator of (HJ 76-2017) meets the requirements.
Embodiment two:
As shown in Figure 3 and Figure 4, the difference between this embodiment and the first embodiment lies in:
Temperature sensor 21 and pressure sensor 22 are equipped in sensing chamber 1, sensing chamber 1 is interior to be equipped with principal reflection mirror in right part
13,1 left part of sensing chamber is equipped with subreflector 20 corresponding with principal reflection mirror 13, the admission line 15 of 1 right end of sensing chamber connection
On from right-to-left be successively arranged check-valves 14, NOx converter 19 and filter 16, NOx converter 19 is located at standard gas pipeline 10 and goes out
Between gas end and filter 16.
Principal reflection mirror 13 includes x three angle mirrors being set side by side, and subreflector 20 includes the x-1 triangles being set side by side
Mirror, three angle mirrors of principal reflection mirror 13 are towards left setting, and three angle mirrors of subreflector 20 are towards right setting, and i-th three of subreflector 20
Angle mirror lower half and i-th of three angle mirror upper halves of principal reflection mirror 13 are oppositely arranged, i=1,2 ... ..., x-1；Light is in principal reflection
Transmittance process between mirror 13 and subreflector 20 are as follows: the light that light source module 3 issues injects the 1st triangle of principal reflection mirror 13
Mirror, light is reflexed to the 1st three angle mirrors of subreflector 20 by the 1st three angle mirrors of principal reflection mirror 13, then by subreflector
20 the 1st three angle mirrors reflex to the 2nd three angle mirrors of principal reflection mirror 13, up to light is by xth -1 of subreflector 20
After three angle mirrors 20 reflex to x-th of three angle mirrors of principal reflection mirror 13, light is finally reflected by x-th of three angle mirrors of principal reflection mirror 13
To the spectrum acquisition analysis module 2 in left side.
Light source module 3 passes through mirror based fiber optica by 23 communication with detection room 1 of launching fiber unit, spectrum acquisition analysis module 2
25 communication with detection room 1 of unit, launching fiber unit 23 are arranged between light source module 3 and principal reflection mirror 13, mirror based fiber optica unit
25 are arranged between principal reflection mirror 13 and spectrum acquisition analysis module 2；Launching fiber unit 23 includes that diversing lens and transmitting are led
Light optical fiber, diversing lens and transmitting light-conductive optic fibre, which emit along light source module 3 to the optical path direction of principal reflection mirror 13, to be set gradually, instead
Penetrating fiber unit 25 includes mirror lens and reflection light optical fiber, and mirror lens and reflection light optical fiber are reflected along principal reflection mirror 13
It is set gradually to the optical path direction of spectrum acquisition analysis module 2.
The working principle of embodiment two are as follows:
When sample gas detects, extraction valve 4 and aspiration pump 7 are opened, and standard gas intake valve 11 and purging intake valve 8 are closed, flue gas mistake
Negative-pressure sucking is generated in filter bowl 12, the sample gas in flue enters smoke filtration cover 12, filter out after the solid particulate matter in flue gas according to
It is secondary after admission line 15, NOx converter 19 and filter 16, it is clean to contain gas pollutant SO2、NOXSample gas pass through
Sensing chamber 1 enters sensing chamber 1 and carries out spectral detection, is discharged subsequently into pump-line 5 and by aspiration pump 7.
The spectral-analysis process of the present embodiment are as follows: light source module 3 issues the light of ultraviolet band, the light warp of ultraviolet band
By transmitting light unit by sensing chamber 1 and propagating on principal reflection mirror 13, then principal reflection mirror 13 and subreflector 20 it
Between carry out multiple reflections after, the light of final ultraviolet band enters spectrum acquisition detection module via mirror based fiber optica unit 25, by
SO in sample gas2、NOXCharacteristic wave bands in meeting 1 light of absorption detecting room, 2 pairs of spectrum acquisition analysis module by gas pollutant
The spectrum of light after absorption is analyzed, and the temperature signal and pressure sensor 22 that are detected according to temperature sensor 21 detect
Pressure signal, analyzed via spectroanalysis instrument and obtain gas pollutant concentration.
When standard gas is demarcated, extraction valve 4 and standard gas intake valve 11 are opened, and aspiration pump 7 and purging intake valve 8 are closed, check-valves
14 since non-return acts on, and standard gas can not leak into flue from admission line 15, and flue gas can not enter admission line 15；It is marking
Atmospheric pressure effect under, external standard gas gas source successively via after standard gas pipeline 10 and filter 16 enter sensing chamber 1, spectral detection mould
Block carries out spectrum analysis and carries out parameter calibration, and standard gas is discharged after finally flowing through pump-line 5 and gas flow controller 6.
Embodiment three:
As shown in Figure 5 and Figure 6, the difference between this embodiment and the first embodiment lies in:
1 excircle of sensing chamber is arranged with sealing sleeve pipe 26, and 26 outer diameter of sealing sleeve pipe is maximum not less than smoke filtration cover 12 outer
Diameter；Temperature sensor 21 and pressure sensor 22 are equipped in sensing chamber 1, temperature sensor 21 and pressure sensor 22 are located at detection
1 left end of room is respectively used to the temperature and pressure of sample gas in detection sensing chamber 1.
Smoke valve in the present embodiment uses stock control valve 24, and stock control valve 24 includes valve body, valve rod and holds
Row device, 15 entrance of admission line extend downwardly, and valve body is arranged in 15 inlet of admission line, and actuator is located at outside walling of flue 18,
Valve body and actuator are rotatablely connected by valve rod, realize actuator long-distance control valve body, the outlet side of aspiration pump 7 passes through outlet
Pipeline 27 is connected to inside flue.
Light source module 3 passes through mirror based fiber optica by 23 communication with detection room 1 of launching fiber unit, spectrum acquisition analysis module 2
25 communication with detection room 1 of unit, launching fiber unit 23 are arranged between light source module 3 and principal reflection mirror 13, mirror based fiber optica unit
25 are arranged between principal reflection mirror 13 and spectrum acquisition analysis module 2；Launching fiber unit 23 includes that diversing lens and transmitting are led
Light optical fiber, diversing lens and transmitting light-conductive optic fibre, which emit along light source module 3 to the optical path direction of principal reflection mirror 13, to be set gradually, instead
Penetrating fiber unit 25 includes mirror lens and reflection light optical fiber, and mirror lens and reflection light optical fiber are reflected along principal reflection mirror 13
It is set gradually to the optical path direction of spectrum acquisition analysis module 2.
The working principle of embodiment three are as follows:
When sample gas detects, stock control valve 24, extraction valve 4 and aspiration pump 7 are opened, standard gas intake valve 11 and purging air inlet
Valve 8 is closed, and negative-pressure sucking is generated in smoke filtration cover 12, and the sample gas in flue enters smoke filtration cover 12, filters out solid particle
Sample gas after object successively passes through stock control valve 24, admission line 15 and filter 16, and then, clean contains gaseous contamination
Object SO2、NOXSample gas by sensing chamber 1 enter sensing chamber 1 carry out spectral detection, subsequently into pump-line 5, gas flow control
Device 6 processed is simultaneously discharged into flue by the extraction of aspiration pump 7, avoids pollution air.
It is detected in above-mentioned sample gas and in the process, gas flow in 6 real-time detection pump-line 5 of gas flow controller,
When flow value, which is less than, limits threshold value, it was demonstrated that stopping state occurs in smoke filtration cover 12, at this point, by stock control valve 24 and mark
Gas intake valve 11 is closed, and purging intake valve 8 is opened, and external compression gas source enters inside smoke filtration cover 12 via purging pipeline 9,
And smoke filtration cover 12 is purged from inside to outside, remove 12 surface dirt of smoke filtration cover.The value of flow restriction threshold value need to ensure
Stablized by the flue gas flow of monitoring device, while meeting " the continuous prison of stationary source flue gas (SO2, NOX, particulate matter) discharge
Examining system technical requirements and detection method " " influence of the sample introduction changes in flow rate " technical indicator of (HJ 76-2017) meets the requirements.
The spectral-analysis process of the present embodiment are as follows: light source module 3 issues the light of ultraviolet band, the light warp of ultraviolet band
It crosses after principal reflection mirror 13 reflects and enters spectrum acquisition detection module, due to the SO in sample gas2、NOXThe feature in inspection light can be absorbed
Wave band, 2 pairs of spectrum acquisition analysis module absorbed by gas pollutant after the spectrum of light analyze, and according to temperature sensing
The pressure signal that the temperature signal and pressure sensor 22 that device 21 detects detect is analyzed via spectroanalysis instrument and obtains gas dirt
Contaminate object concentration.
When standard gas is demarcated, extraction valve 4, aspiration pump 7 and standard gas intake valve 11 are opened, and stock control valve 24 is closed, flue gas
Valve is that stock control valve 24 is in close state, and standard gas can not leak into flue from admission line 15, and flue gas equally cannot
Into admission line 15；Under the swabbing action that aspiration pump 7 generates, external standard gas gas source is successively via standard gas pipeline 10 and filtering
Enter sensing chamber 1 after device 16, spectral detection module carries out spectrum analysis and carries out parameter calibration, and standard gas is finally successively by pumping
Pipeline 5, gas flow controller 6 and aspiration pump 7, are finally discharged into flue by aspiration pump 7.
Example IV:
As shown in Figure 7 and Figure 8, the present embodiment and the difference of embodiment three are:
Smoke valve uses check-valves 14 in the present embodiment, and the inlet of 15 right end of admission line is arranged in check-valves 14,
For admission line 15 by being connected to inside check-valves 14 and smoke filtration cover 12, from right to left, i.e., the circulating direction of check-valves 14 is
It is consistent with sample gas circulating direction, filter 16 is equipped in the admission line 15 in 14 left side of check-valves.
Pump-line 5 is equipped with oxygen detection module 28, and oxygen detection module 28 is between extraction valve 4 and aspiration pump 7
And for oxygen concentration in real-time detection sample gas, the detection signal that 28 output end of oxygen detection module connects central processing module is defeated
Enter end.
Using air ejector of emanating, air ejector of emanating is equipped with compressed air inlet, sample gas pump orifice and sample gas and goes out aspiration pump 7
Mouthful, compressed air inlet is connected to external pressure gas source, and sample gas pump orifice is connected to exhaust tube, sample gas outlet outlet pipe 27.
The working principle of example IV are as follows:
When sample gas detects, check-valves 14, extraction valve 4 and aspiration pump 7 are opened, and standard gas intake valve 11 and purging intake valve 8 close
It closes, negative-pressure sucking is generated in smoke filtration cover 12, the sample gas in flue enters smoke filtration cover 12, filters out the solid in flue gas
Sample gas after grain object successively passes through check-valves 14, admission line 15 and filter 16, and then, clean contains gas pollutant
SO2、NOXSample gas enter sensing chamber 1 carry out spectral detection, then flow sequentially through into pump-line 5, oxygen detection module 28
With gas flow controller 6, finally it is discharged into flue by aspiration pump 7, avoids pollution air.
The spectral-analysis process of the present embodiment are as follows: light source module 3 issues the light of ultraviolet band, the light warp of ultraviolet band
It crosses after principal reflection mirror 13 reflects and enters spectrum acquisition detection module, due to the SO in sample gas2、NOXIn meeting 1 light of absorption detecting room
Characteristic wave bands, 2 pairs of spectrum acquisition analysis module absorbed by gas pollutant after the spectrum of light analyze, and according to temperature
Degree, pressure and oxygen content data, analyze via spectroanalysis instrument and obtain gas pollutant concentration；At the same time, oxygen detection
Module 28 analyzes the oxygen content in the sample gas of high temperature, obtains oxygen concentration.
When standard gas is demarcated, extraction valve 4, aspiration pump 7 and standard gas intake valve 11 are opened, and check-valves 14 and purging intake valve 8 close
It closes, under the one-way flow effect of check-valves 14, standard gas can not leak into flue from admission line 15, and flue gas is not due to bearing
Pressure effect equally cannot be introduced into admission line 15, ensure that the pure of sample gas；External standard gas gas source is successively via standard gas pipeline 10
With after filter 16 enter sensing chamber 1, spectral detection module carry out spectrum analysis simultaneously carry out parameter calibration, then, standard gas enter
Pump-line 5, oxygen detection module 28, gas flow controller 6 and aspiration pump 7, are finally discharged into flue via aspiration pump 7.With
This simultaneously, oxygen detection module 28 carries out oxygen content analysis and calibration.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that, still may be used
To modify to technical solution documented by previous embodiment, or some or all of the technical features are equal
Replacement, and these are modified or replaceed, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. a kind of directly measurement formula gaseous pollutant emission monitoring device, it is characterised in that: including testing agency, interrupter,
Extraction sector, calibrating device, blowing mechanism and central processing module；
Testing agency includes sensing chamber, is equipped on the left of sensing chamber and the spectral detection module that be connected to inside sensing chamber, detection interior
Equipped with principal reflection mirror, spectral detection module is oppositely arranged with principal reflection mirror；The spectral detection module includes light source module and light
Spectrum receives analysis module；
Interrupter includes the admission line of communication with detection room right end and the smoke valve that admission line inlet is arranged in, air inlet pipe
Road and smoke valve are arranged in flue, and smoke filtration cover is arranged with outside admission line entrance, is equipped with filter in admission line；
Extraction sector includes pump-line, extraction valve and aspiration pump, pump-line entrance communication with detection room left part, pump-line
Outlet connection aspiration pump, extraction valve are arranged in pump-line；
Calibrating device includes standard gas pipeline and the standard gas intake valve that is arranged on standard gas pipeline, and the connection of standard gas pipeline air-inlet end is external
Standard gas source, standard gas pipeline outlet side are connected to admission line, and standard gas pipeline outlet side is between smoke valve and filter；
Blowing mechanism includes purging pipeline, the purging gentle body flow controller of intake valve, the external mark of purging pipeline inlet end connection
Quasi- gas source, scavenging conduit road outlet side are protruded into flue and are connected to inside smoke filtration cover, and purging intake valve is arranged on purging pipeline,
Gas flow controller is arranged on pump-line；
Light source module controlled end connect central processing module light source control end, spectrum acquisition analysis module communication terminal connection in
The spectrum analysis communication terminal of processing module is entreated, gas flow controller communication terminal connects central processing module flow communication terminal, in
Processing module pumping control terminal is entreated to connect aspiration pump controlled end.
2. direct measurement formula gaseous pollutant emission monitoring device according to claim 1, it is characterised in that: the light source
Module passes through mirror based fiber optica unit communication with detection by launching fiber unit communication with detection room, the spectrum acquisition analysis module
Room, launching fiber unit are arranged between light source module and principal reflection mirror, and mirror based fiber optica unit is arranged in principal reflection mirror and spectrum
It receives between analysis module；Launching fiber unit includes diversing lens and transmitting light-conductive optic fibre, the guide-lighting light of diversing lens and transmitting
Fibre, which emits along light source module to the optical path direction of principal reflection mirror, to be set gradually, and mirror based fiber optica unit includes that mirror lens and reflection are led
Light optical fiber, mirror lens and reflection light optical fiber are successively set along the optical path direction that principal reflection mirror is reflected towards spectrum acquisition analysis module
It sets.
3. direct measurement formula gaseous pollutant emission monitoring device according to claim 2, it is characterised in that: the detection
Interior is additionally provided with subreflector, and subreflector is located on the left of principal reflection mirror and is oppositely arranged with principal reflection mirror.
4. direct measurement formula gaseous pollutant emission monitoring device according to claim 1 or 2, it is characterised in that: described
Testing agency further includes that setting is detecting indoor temperature sensor and pressure sensor, temperature sensor and pressure sensor
Output end is separately connected spectrum acquisition analysis module signal input part.
5. direct measurement formula gaseous pollutant emission monitoring device according to claim 1 or 2, it is characterised in that: also wrap
The oxygen detection module being arranged on pump-line is included, oxygen detection module output end connects the detection signal of central processing module
Input terminal；When the gas pollutant content in high-temperature sample gas detects in testing agency, oxygen detection module is to the same as equally gas
Oxygen content directly detected, testing agency carry out standard gas calibration when, standard gas enter simultaneously oxygen detection module to oxygen inspection
Module is surveyed to be demarcated.
6. direct measurement formula gaseous pollutant emission monitoring device according to claim 1 or 2, it is characterised in that: described
Admission line is equipped with NOXConverter, NOXConverter is arranged between standard gas pipeline outlet side and filter.
7. direct measurement formula gaseous pollutant emission monitoring device according to claim 1 or 2, it is characterised in that: described
Smoke valve uses check-valves or stock control valve.
8. direct measurement formula gaseous pollutant emission monitoring device according to claim 1 or 2, it is characterised in that: described
For aspiration pump using air ejector of emanating, it is empty that air ejector of emanating is equipped with compressed air inlet, sample gas pump orifice and the outlet of sample gas, compression
Gas entrance is connected to external air source, and sample gas pump orifice is connected to exhaust tube, sample gas outlet outlet pipe, and outlet pipe is connected to flue
It is internal.
9. direct measurement formula gaseous pollutant emission monitoring device according to claim 1 or 2, it is characterised in that: described
The light of light source module transmitting is ultraviolet light.
10. a kind of directly measurement formula gaseous pollutant emission monitoring device according to claim 1 or claim 2, it is characterised in that: use
When standard gas is demarcated, standard gas intake valve is opened, and smoke valve is closed, and standard gas is isolated with the flue gas in filter mantle, and flue gas cannot be into
Enter admission line to mix with standard gas, standard gas will not leak into flue from admission line.
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| CN201821540328.2U CN208736796U (en) | 2018-09-20 | 2018-09-20 | It is a kind of directly to measure formula gaseous pollutant emission monitoring device |
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| CN201821540328.2U CN208736796U (en) | 2018-09-20 | 2018-09-20 | It is a kind of directly to measure formula gaseous pollutant emission monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801964A (en) * | 2018-09-20 | 2018-11-13 | 刘建松 | It is a kind of directly to measure formula gaseous pollutant emission monitoring device |
| CN113408945A (en) * | 2021-07-15 | 2021-09-17 | 广西中烟工业有限责任公司 | Method and device for detecting purity of flue-cured tobacco, electronic equipment and storage medium |
-
2018
- 2018-09-20 CN CN201821540328.2U patent/CN208736796U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801964A (en) * | 2018-09-20 | 2018-11-13 | 刘建松 | It is a kind of directly to measure formula gaseous pollutant emission monitoring device |
| CN113408945A (en) * | 2021-07-15 | 2021-09-17 | 广西中烟工业有限责任公司 | Method and device for detecting purity of flue-cured tobacco, electronic equipment and storage medium |
| CN113408945B (en) * | 2021-07-15 | 2023-03-24 | 广西中烟工业有限责任公司 | Method and device for detecting purity of flue-cured tobacco, electronic equipment and storage medium |
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