CN110161189A - A kind of portable multi-measuring point nitrogen oxides sync detection device and its detection method - Google Patents
A kind of portable multi-measuring point nitrogen oxides sync detection device and its detection method Download PDFInfo
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- CN110161189A CN110161189A CN201910518492.6A CN201910518492A CN110161189A CN 110161189 A CN110161189 A CN 110161189A CN 201910518492 A CN201910518492 A CN 201910518492A CN 110161189 A CN110161189 A CN 110161189A
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000010992 reflux Methods 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 54
- 238000005070 sampling Methods 0.000 claims abstract description 52
- 239000000523 sample Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims description 33
- 239000000779 smoke Substances 0.000 claims description 28
- 238000013500 data storage Methods 0.000 claims description 12
- 210000000352 storage cell Anatomy 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 4
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 52
- 229910021529 ammonia Inorganic materials 0.000 description 25
- 238000005507 spraying Methods 0.000 description 20
- 239000007921 spray Substances 0.000 description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0067—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display by measuring the rate of variation of the concentration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to flue gas inspection technical fields, and in particular to a kind of portable multi-measuring point nitrogen oxides sync detection device and its detection method；Its structure includes instrument, probe tube, sampling feeler lever, compressed air line, pressure reducing valve, reflux line；Instrument upper surface is provided with display screen, sampling pipe fitting, power connection, compression gas pipe wire terminal, reflux tube joint；Gauge internal is provided with control system, drainage device and sensor；Control system is electrically connected with display screen；Each probe tube is connect with sampling feeler lever；Each probe tube other end is connect with sampling pipe fitting；Pressure reducing valve is installed, compressed air line is for being passed through compressed air for instrument in compressed air line；Power connection is for connecting power supply；The present apparatus realizes multi-measuring point, distribution, simultaneously sampling analysis nitrous oxides concentration, and detection while realizing multipoint data, the nitrous oxides concentration numerical value of each sampled point of real-time display, realizes the Real-time Feedback of data on a display screen.
Description
Technical field
The invention belongs to flue gas inspection technical fields, and in particular to a kind of portable multi-measuring point nitrogen oxides is synchronous to detect dress
It sets and its detection method.
Background technique
Coal-burning power plant, China mostly uses greatly selective catalytic reduction (SCR) denitration technology to administer NOx pollutant.SCR denitration
The core equipment of technology is SCR reactor, and the process flow of SCR denitration reaction is as follows: the former flue gas come out from economizer first exists
It is mixed at subregion ammonia-spraying grid with by diluted ammonia, ammonia-spraying grid is made of several nozzles being evenly arranged, each spray
A Hand-operated butterfly valve is installed to adjust the ammonia spraying amount size in a region in ammonia branch road, and mixed flue gas is reacted by SCR again
Device, two layers of arrangement or three layers of catalyst, mixed flue gas containing ammonia are contacted with catalyst surface in reactor, wherein NOx and NH3
The N that reduction reaction generates environmental sound occurs in catalyst surface2And water, to achieve the purpose that remove NOx in flue gas.Its
Specific chemical equation is as follows:
4NO + 4NH3 + O2 → 4N2 + 6H2O, 4NO2 + 2NH3 + O2 → 3N2 + 6H2O；
Side effect SO3Equation are as follows:
SO2+1/2O2→SO3, NH3 + SO3 + H2O → NH4HSO4。
By the above chemical equation it is found that denitration reaction strong real-time, in strict accordance with ammonia nitrogen molar ratio reaction, because
Each small subregion nitrogen oxides flow field and distribution of concentration nitrogen oxidation that is uneven, therefore containing in each subregion at ammonia-spraying grid
Object total amount be it is differentiated, if ammonia-spraying grid each branch spray ammonia not with actually match, will result in the excessive spray ammonia in part, office
Ammonia is sprayed in portion less, and the excessive ammonia region ammonia nitrogen molar ratio the escaping of ammonia that is bound to greatly that sprays will increase, and the probability for forming hydrogen sulfate ammonia will increase,
Since the Property comparison of hydrogen sulfate ammonia is sticky, can be bonded on its heat exchanger fin when flue gas passes through air preheater, over time
Due to the accumulation of hydrogen sulfate ammonia, air preheater can be blocked, and less serious case increases the power consumption of air-introduced machine and pressure fan, or even will affect
The safe operation of unit；Spray ammonia region ammonia nitrogen molar ratio is small less, and it is locally exceeded to will cause nitrogen oxides, the gesture if wanting qualified discharge
It must increase always for ammonia amount, while cause the increase of ammonia consumption.
It in order to solve problem above, denitration ammonia-spraying grid usual one month will be according to the concentration distribution of outlet nitrogen oxides
Situation adjusts the aperture of sectional valve, by denitration outlet nitrous oxides concentration adjustment balance, currently, ammonia-spraying grid leveling exists again
Following problems:
1, existing portable apparatus is spot measurement, if time needs of each Subarea detecting are 40 minutes time-consuming, due to denitration
Actual condition variation it is bigger, the numerical value of each measuring point cannot represent the data under same operating condition, therefore can not give spray ammonia lattice
Grid adjust engineer and provide accurately data, and the adjustment period is long, and the deviation of data adjusts spray ammonia to grid adjustment engineer
Grid has little significance, and effect is unobvious.
2, existing unilateral point portable apparatus must carry out measuring point wheel flow measurement in the case where host system maintains same operating, refer to
Lead the adjustment of ammonia-spraying grid.The situation of host operating condition variation can not be coped with.
3, existing portable apparatus requires sampling flow high, and generally 1 liter/min, the sampling period is long.
4, existing portable apparatus is red (purple) outer analysis method, electrochemistry etc., has cumbersome pre-processing device, and hold
Easily blocking, high failure rate.
Therefore can be by multiple measuring points, nitrogen oxidation concentration value under same operating is accurate, is timely supplied to ammonia-spraying grid
Engineer is adjusted, is the key that can efficiently adjust ammonia-spraying grid；Multi-measuring point is well positioned to meet current spray ammonia lattice with survey technology
The demand of grid adjustment, greatly shortens ammonia-spraying grid adjustment time, improves adjustment effect, with good application prospect.
Summary of the invention
Goal of the invention of the invention is to overcome disadvantage of the existing technology, proposes to design a kind of portable multi-measuring point nitrogen
Oxide sync detection device and its detection method realize multi-measuring point, distribution, simultaneously sampling analysis nitrous oxides concentration,
Detection while realizing multipoint data, the nitrous oxides concentration numerical value of each sampled point of real-time display on a display screen, and adopt
With wireless transmission method, the Real-time Feedback of data is realized.
Portable multi-measuring point nitrogen oxides sync detection device of the present invention, main structure include instrument, sampling
Pipe, sampling feeler lever, compressed air line, pressure reducing valve, reflux line；The instrument upper surface is provided with display screen, in instrument
Several sampling pipe fittings are provided with, and sample the left and right sides that display screen is averagely arranged in pipe fitting, instrument upper surface is also set
It is equipped with power connection and compression gas pipe wire terminal, several reflux tube joints are provided on the side surface of instrument, and return pipe connects
Head is flat to be arranged on the left side and right side of instrument；If gauge internal be provided with control system, several drainage devices and
Dry sensor；Sensor is provided on each drainage device；Each sensor is electrically connected to the control system, control system
It is electrically connected with display screen, control system is used for data processing, stores and transmits, and display screen is for each sampled point of real-time display
Nitrous oxides concentration numerical value；The probe tube is several, and one end of each probe tube passes through tower-shaped interface and sampling is visited
Bar connection；Sampling feeler lever is inserted into the detection hole reserved on flue, and sampling feeler lever one end is inserted into denitration flue, is taken for flue gas
Sample；Each probe tube other end is connect with sampling pipe fitting, and is connect by sampling pipe fitting with drainage device；Described returns
Flow tube road includes a reflux main pipe and several reflux branch pipes；Each reflux branch pipe one end is connect with reflux tube joint, and
It is connect by reflux tube joint with drainage device, each reflux branch pipe other end is connect with reflux main pipe, the main pipe that flows back and cigarette
Road connection setting, so that the gaseous mixture in each reflux branch pipe is back in flue；The compressed air line and compressed gas
Pipe joint connection, and connect by compression gas pipe wire terminal with drainage device, pressure reducing valve is installed in compressed air line, is pressed
Contracting gas line is for being passed through compressed air for instrument；Power connection is for connecting power supply.
Drainage device of the present invention includes shell, smoke collecting channel, interface channel, compressed gas channel, filtering
Device, mounting hole；Smoke collecting channel, interface channel, compressed gas channel, filter are provided in the shell；Probe tube
It is connect by sampling pipe fitting with smoke collecting one end of the channel, the closing of the smoke collecting channel other end；Smoke collecting channel is located at
The top in compressed gas channel, and be connected to and be arranged by interface channel；The branch pipe that flows back is logical by reflux tube joint and compressed gas
Road one end is connected to setting with compressed air line with setting, the compressed gas channel other end is connected to, and compressed gas channel introduces pressure
Contracting gas plays the role of drainage to flue gas, and is discharged into flue after flue gas and compressed air are mixed by reflux line；Shell
Mounting hole is offered on body, sensor is mounted on mounting hole, and mounting hole is connected to smoke collecting channel, and mounting hole and flue gas are adopted
Collection is provided with filter between channel；Sampling mode, the flue gas of each drainage device acquisition and compression are drained using compressed air
It is again introduced into flue after air mixing, sampling flow can be adjusted by compressed air pressure；Gas diffusion principle is utilized,
Sampling flue gas passes through the filter filtering being arranged in drainage device, and diffuses to sensor, and then the data of acquisition are transmitted
Processing analysis is carried out into control system, obtains the nitrous oxides concentration numerical value of each sampled point, and real-time display is in display screen
On.
Control system of the present invention includes data processing unit, data storage cell and data transmission unit；Data
Processing unit is electrically connected with sensor, for receiving and processing the collected data information of sensor；Data storage cell and number
It is electrically connected according to processing unit, for storing data the initial data of processing unit and treated data information；Display screen and number
Each of it is electrically connected according to processing unit, data storage cell, obtained after data processing unit is handled for real-time display
The nitrous oxides concentration numerical value of sampled point, and the data information in data storage cell can be called directly, additionally it is possible to write-in is repaired
Positive parameter is to realize instrument check；Data transmission unit is electrically connected with data processing unit, and with mobile terminal (such as mobile phone)
By wireless network connection, for by data processing unit treated data by wireless network synchronization be transmitted to it is mobile eventually
End is adjusted branch pipe regulating valve, directly with instructing ammonia-spraying grid adjustment engineer according to the nitrous oxides concentration data of outlet
Nitrous oxides concentration CV(coefficient of standard deviation is exported to denitration) value is reasonable.
The number of the present invention for sampling pipe fitting, reflux tube joint, drainage device, sensor, probe tube, the branch pipe that flows back
It measures identical.
The beneficial effects of the present invention are: compared with prior art, which has the beneficial effect that
1. realizing multidraw, detection data more adjusts directiveness for ammonia-spraying grid；It is generated 2. multi-measuring point data are synchronous, no
There are the time difference, the NOx concentration distribution situation under same operating can be reacted；3. the multi-point simultaneous-measurement function of the device is in host operating condition
Under situation of change, can still ammonia-spraying grid be instructed to adjust, compared with existing single-point portable type measuring instrument, host can be greatlyd save
System is the time for the same operating condition operation that cooperates ammonia-spraying grid adjustment and must maintain, and reduction is not responding to because maintaining same operating
Net loses caused by adjusting；4. portable wireless transmission mode, real-time feedback data shorten grid adjustment engineer and spray ammonia adjustment
Time；5. sample lines do not block.
Detailed description of the invention
Fig. 1 is instrument structure schematic diagram of the present invention；
Fig. 2 is main structure schematic illustration of the present invention；
Fig. 3 is gauge internal schematic enlarged-scale view of the present invention；
Fig. 4 is the portion the C schematic enlarged-scale view of Fig. 3 of the present invention；
Fig. 5 is ammonia-spraying grid of the present invention, spray ammonia branch pipe, spray ammonia main pipe structural schematic diagram；
Fig. 6 is denitration structural schematic diagram of the present invention；
Wherein, instrument 1, display screen 101, sampling pipe fitting 102, power connection 103, compression gas pipe wire terminal 104, return pipe connect
First 105, probe tube 2, sampling feeler lever 3, compressed air line 4, pressure reducing valve 5, reflux line 6, reflux main pipe 601, reflux branch pipe
602, control system 7, drainage device 8, shell 801, smoke collecting channel 802, interface channel 803, compressed gas channel 804,
Filter 805, mounting hole 806, sensor 9, detection hole 10, ammonia-spraying grid 11, spray ammonia branch pipe 12, spray ammonia main pipe 13, branch pipe tune
Save valve 14, main pipe regulating valve 15, lid 16, fastener 17, snap lock 18.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Below by specific embodiment, the invention will be further described.
Embodiment 1:
The portable multi-measuring point nitrogen oxides sync detection device that the present embodiment is related to, main structure include instrument 1, probe tube
2, sampling feeler lever 3, compressed air line 4, pressure reducing valve 5, reflux line 6；1 upper surface of instrument is provided with display screen 101,
It is respectively set at left and right sides of display screen 101 there are three pipe fitting 102 is sampled, 1 upper surface of instrument is additionally provided with 103 He of power connection
Compression gas pipe wire terminal 104,1 left side of instrument and right side are respectively set there are three reflux tube joint 105；It is set inside instrument 1
It is equipped with 7, six drainage devices 8 of control system and six sensors 9；Sensor 9 is provided on each drainage device 8；Each
Sensor 9 is electrically connected with control system 7, and control system 7 is electrically connected with display screen 101, control system 7 for data processing,
It stores and transmits, display screen 101 is used for the nitrous oxides concentration numerical value of each sampled point of real-time display；The probe tube 2 is
Six, one end of each probe tube 2 passes through tower-shaped interface and connect with sampling feeler lever 3；It is reserved on the insertion flue of sampling feeler lever 3
Detection hole 10,3 one end of sampling feeler lever are inserted into denitration flue, and smoke sampling is used for；Six 2 other ends of probe tube respectively with six
It samples pipe fitting 102 to connect, and is connect respectively by six sampling pipe fittings 102 with drainage device 8；The reflux line 6
Including a reflux main pipe 601 and six reflux branch pipes 602；Six 602 one end of reflux branch pipe respectively with six reflux tube joints
105 connections, and connect with drainage device 8 by six reflux tube joints 105 respectively, six 602 other ends of reflux branch pipe and time
It flows main pipe 601 to connect, reflux main pipe 601 is connected to setting with flue, so that the gaseous mixture in each reflux branch pipe 602 is back to cigarette
In road；The compressed air line 4 is connect with compression gas pipe wire terminal 104, and passes through compression gas pipe wire terminal 104 and drainage
Device 8 connects, and pressure reducing valve 5 is equipped in compressed air line 4, compressed air line 4 is for being passed through compressed air for instrument；Power supply
Connector 103 is for connecting power supply.
Drainage device 8 described in the present embodiment includes shell 801, smoke collecting channel 802, interface channel 803, compressed gas
Body channel 804, filter 805, mounting hole 806；Smoke collecting channel 802, interface channel are provided in the shell 801
803, compressed gas channel 804, filter 805；Probe tube 2 is connected by sampling pipe fitting 102 and 802 one end of smoke collecting channel
It connects, the closing of 802 other end of smoke collecting channel；Smoke collecting channel 802 is located at the top in compressed gas channel 804, and passes through
The connection setting of interface channel 803；Reflux branch pipe 602 is set by reflux tube joint 105 and 804 one end of compressed gas channel with being connected to
It sets, 804 other end of compressed gas channel is connected to setting with compressed air line 4, and compressed gas channel 804 introduces compressed gas,
Play the role of drainage to flue gas, and is discharged into flue after flue gas and compressed air are mixed by reflux line 6；Shell 801
On offer mounting hole 806, sensor 9 is mounted on mounting hole 806, and mounting hole 806 is connected to smoke collecting channel 802, peace
Filter 805 is provided between dress hole 806 and smoke collecting channel 802；Sampling mode, each drainage are drained using compressed air
The flue gas that device 8 acquires is again introduced into flue after mixing with compressed air, and sampling flow can be adjusted by compressed air pressure
It is whole；Gas diffusion principle is utilized, sampling flue gas passes through the filter 805 being arranged in drainage device 8 and filters, and diffuses to biography
Sensor 9, and then the data of acquisition are transmitted in control system 7 and carry out processing analysis, obtain the nitrogen oxides of each sampled point
Concentration values, and real-time display is on display screen 101.
Control system 7 described in the present embodiment includes data processing unit, data storage cell and data transmission unit；Number
It is electrically connected according to processing unit with sensor 9, for receiving and processing the collected data information of sensor 9；Data storage cell
It is electrically connected with data processing unit, for storing data the initial data of processing unit and treated data information；Display screen
101 are electrically connected with data processing unit, data storage cell, the nitrous oxides concentration for each sampled point of real-time display
Numerical value, and the data information in data storage cell can be called directly, additionally it is possible to corrected parameter is written to realize instrument check；
Data transmission unit is electrically connected with data processing unit, and is used for mobile terminal (such as mobile phone) by wireless network connection
Data processing unit treated data are transmitted to mobile terminal by wireless network synchronization, to instruct ammonia-spraying grid to adjust work
Cheng Shi is adjusted branch pipe regulating valve 14 according to the nitrous oxides concentration data of outlet, until denitration outlet nitrogen oxides is dense
It is reasonable to spend CV value.
3 one end of sampling feeler lever described in the present embodiment is inserted at the B-B direction 1/2 of denitration flue cross section A；Each sampling is visited
The exit region that the quantity of bar 3 and 11 subregion of ammonia-spraying grid can control, which corresponds, to be arranged；Spraying ammonia branch pipe 12 is six, each
Spray ammonia branch pipe 12 is uniformly arranged in spray ammonia main pipe 13；Branch pipe regulating valve 14 is provided on each spray ammonia branch pipe 12；Spray ammonia
Main pipe regulating valve 15 is provided in main pipe 13.
Lid 16 is provided with above instrument 1 described in the present embodiment, 16 side of lid and instrument 1 are hinged, and the other side passes through
Fastener 17 and snap lock 18 connect.
Embodiment 2:
The portable multi-measuring point nitrogen oxides synchronization detecting method that the present embodiment is related to, the specific process steps are as follows:
It (1) will be in sampling feeler lever 3 uniformly insertion detection hole 10；
(2) the sampling pipe fitting 102 being separately connected 2 both ends of probe tube on sampling feeler lever 3 and instrument 1；
(3) compressed air line 4 is connect with compression gas pipe wire terminal 104, and pressure reducing valve 5 is installed in compressed air line 4,
Pressure reducing valve 5 is in close state at this time, and pressure reducing valve 15 is connected gas source；
(4) instrument 1 is grounded reliable ground；
(5) external power supply is connected by power connection 103, powers to instrument 1, is switched on and preheats 15-20 minutes；
(6) because being negative pressure state in flue, air passes sequentially through compressed gas channel 804, connects through reflux tube joint 105 at this time
Road 803, smoke collecting channel 802 are connected, is contacted with sensor 9, realizes instrument balance check；
(7) calibrating gas is passed sequentially through into compressed gas channel 804, connecting pipe 803, smoke collecting through reflux tube joint 105
Channel 802 is contacted with sensor 9, realizes instrument range verification；
(8) 6 both ends of reflux line are connect with reflux tube joint 105, the flue of instrument 1 respectively；
(9) gradually adjustment pressure reducing valve 5 to compressed air pressure is 0.1MPa, is introduced compressed air into compressed gas channel 804,
Start sample detecting:
S1, sampling feeler lever 3 sample the flue gas of multiple sampled points, and flue gas is under compressed air drainage, sampled spy
Bar 3, probe tube 2 enter smoke collecting channel 802；
S2, flue gas diffuse to sensor 9 through filter 805, and sensor 9 detects flue gas, and collected data are passed
It transports to and carries out data processing, the nitrous oxides concentration value of obtained each sampled point in control system 7, and real-time display is being shown
On screen 101；
S3, flue gas are arranged after mixing into compressed gas channel 804 with compressed gas by reflux line 6 again through interface channel 803
Enter in flue；
(10) the nitrous oxides concentration value of each sampled point shown according to display screen 101, adjustment branch pipe regulating valve 12 is until de-
It is reasonable that nitre exports nitrous oxides concentration CV value；
(11) after adjusting, pressure reducing valve 5 is closed, stops 1 power supply of instrument.
Above-mentioned specific embodiment is only specific case of the invention, and scope of patent protection of the invention includes but is not limited to
The product form and style of above-mentioned specific embodiment, any claims of the present invention and any technical field of meeting
The appropriate changes or modifications that those of ordinary skill does it, all shall fall within the protection scope of the present invention.
Claims (8)
1. a kind of portable multi-measuring point nitrogen oxides sync detection device, it is characterised in that: its main structure include instrument (1),
Probe tube (2), sampling feeler lever (3), compressed air line (4), pressure reducing valve (5), reflux line (6)；Table in the instrument (1)
Face is provided with display screen (101), several samplings pipe fitting (102) is provided in instrument (1), and it is flat to sample pipe fitting (102)
It is arranged at the left and right sides of display screen (101), instrument (1) upper surface is additionally provided with power connection (103) and compressed gas pipeline
Connector (104) is provided with several reflux tube joints (105) on the side surface of instrument (1), and reflux tube joint (105) is average
It is arranged on the left side and right side of instrument (1)；Instrument (1) is internally provided with control system (7), several drainage devices
(8) and several sensors (9)；Sensor (9) are provided on each drainage device (8)；Each sensor (9) with control
System (7) electrical connection, control system (7) are electrically connected with display screen (101), and control system (7) is used for data processing, storage and biography
Defeated, display screen (101) is used for the nitrous oxides concentration numerical value of each sampled point of real-time display；The probe tube (2) is several
A, one end of each probe tube (2) passes through tower-shaped interface and connect with sampling feeler lever (3)；Sampling feeler lever (3) is inserted into pre- on flue
The detection hole (10) stayed, sampling feeler lever (3) one end are inserted into denitration flue, and smoke sampling is used for；Each probe tube (2) other end
It is connect with sampling pipe fitting (102), and connect by sampling pipe fitting (102) with drainage device (8)；The reflux line
It (6) include a reflux main pipe (601) and several reflux branch pipe (602)；Each reflux branch pipe (602) one end is and return pipe
Connector (105) connection, and connect by reflux tube joint (105) with drainage device (8), each reflux branch pipe (602) other end
It is connect with reflux main pipe (601), reflux main pipe (601) is connected to setting with flue, so that mixed in each reflux branch pipe (602)
Gas is closed to be back in flue；The compressed air line (4) is connect with compression gas pipe wire terminal (104), and passes through compressed gas
Pipe joint (104) is connect with drainage device (8), and pressure reducing valve (5), compressed air line are equipped in compressed air line (4)
(4) for being passed through compressed air for instrument；Power connection (103) is for connecting power supply.
2. portable multi-measuring point nitrogen oxides sync detection device according to claim 1, it is characterised in that: described draws
Stream device (8) includes shell (801), smoke collecting channel (802), interface channel (803), compressed gas channel (804), filtering
Device (805), mounting hole (806)；Smoke collecting channel (802), interface channel (803), pressure are provided in the shell (801)
Contracting gas passage (804), filter (805)；Probe tube (2) passes through sampling pipe fitting (102) and smoke collecting channel (802) one
End connection, the closing of smoke collecting channel (802) other end；Smoke collecting channel (802) is located at the upper of compressed gas channel (804)
Side, and pass through interface channel (803) connection setting；Reflux branch pipe (602) passes through reflux tube joint (105) and compressed gas channel
(804) one end is connected to setting, compressed gas with compressed air line (4) with setting, compressed gas channel (804) other end is connected to
Channel (804) introduces compressed gas, plays the role of drainage to flue gas, and pass through return pipe after flue gas and compressed air are mixed
Road (6) is discharged into flue；It is offered on shell (801) mounting hole (806), sensor (9) is mounted on mounting hole (806), peace
Dress hole (806) is connected to smoke collecting channel (802), is provided with filtering between mounting hole (806) and smoke collecting channel (802)
Device (805).
3. portable multi-measuring point nitrogen oxides sync detection device according to claim 1, it is characterised in that: the control
System (7) processed includes data processing unit, data storage cell and data transmission unit；Data processing unit and sensor (9)
Electrical connection, for receiving and processing sensor (9) collected data information；Data storage cell is electrically connected with data processing unit
It connects, for storing data the initial data of processing unit and treated data information；Display screen (101) and data processing list
Member, data storage cell are electrically connected, each sampled point obtained after data processing unit is handled for real-time display
Nitrous oxides concentration numerical value, and the data information in data storage cell can be called directly, additionally it is possible to be written corrected parameter with
Realize instrument check；Data transmission unit is electrically connected with data processing unit, and is used with mobile terminal by wireless network connection
In data processing unit treated data are transmitted to mobile terminal by wireless network synchronization.
4. portable multi-measuring point nitrogen oxides sync detection device according to claim 1, it is characterised in that: described takes
Sample pipe fitting (102), reflux tube joint (105), drainage device, sensor (9), probe tube (2), flow back branch pipe (602) number
It measures identical.
5. portable multi-measuring point nitrogen oxides sync detection device according to claim 4, it is characterised in that: described takes
Sample pipe fitting (102), reflux tube joint (105), drainage device, sensor (9), probe tube (2), flow back branch pipe (602) number
Amount is six.
6. portable multi-measuring point nitrogen oxides sync detection device according to claim 1, it is characterised in that: the instrument
It is provided with lid (16) above table (1), hingedly, the other side is by fastener (17) and buckles for lid (16) side and instrument (1)
Lock (18) connection.
7. a kind of portable multi-measuring point nitrogen oxides synchronization detecting method, it is characterised in that: the specific process steps are as follows:
(1) sampling feeler lever (3) is uniformly inserted into detection hole (10)；
(2) the sampling pipe fitting (102) being separately connected probe tube (2) both ends on sampling feeler lever (3) and instrument (1)；
(3) compressed air line (4) is connect with compression gas pipe wire terminal (104), and installs and subtracts on compressed air line (4)
Pressure valve (5), pressure reducing valve (5) is in close state at this time, and pressure reducing valve (15) are connected gas source；
(4) instrument (1) is grounded reliable ground；
(5) external power supply is connected by power connection (103), powers to instrument (1), is switched on and preheats 15-20 minutes；
(6) because being negative pressure state in flue, air passes sequentially through compressed gas channel through reflux tube joint (105) at this time
(804), interface channel (803), smoke collecting channel (802), contact with sensor (9), realize instrument balance check；
(7) calibrating gas is passed sequentially through compressed gas channel (804) through reflux tube joint (105), connecting pipe (803), cigarette
Gas acquisition channel (802) is contacted with sensor (9), realizes instrument range verification；
(8) reflux line (6) both ends are connect with reflux tube joint (105), the flue of instrument (1) respectively；
(9) gradually adjustment pressure reducing valve (5) to compressed air pressure is 0.1MPa, introduces compressed air into compressed gas channel
(804) in, start sample detecting；
(10) according to the nitrous oxides concentration value of each sampled point of display screen (101) display, adjustment branch pipe regulating valve (12) is straight
It is reasonable to denitration outlet nitrous oxides concentration CV value；
(11) it after adjusting, closes pressure reducing valve (5), stops instrument (1) power supply.
8. portable multi-measuring point nitrogen oxides synchronization detecting method according to claim 7, it is characterised in that: the step
Suddenly (9) sample detecting the following steps are included:
S1, sampling feeler lever (3) sample the flue gas of multiple sampled points, and flue gas is sampled under compressed air drainage
Feeler lever (3), probe tube (2) enter smoke collecting channel (802)；
S2, flue gas diffuse to sensor (9) through filter (805), and sensor (9) detects flue gas, and will be collected
Data, which are transmitted in control system (7), carries out data processing, the nitrous oxides concentration value of obtained each sampled point, and shows in real time
Show on display screen (101)；
S3, flue gas are through interface channel (803), by reflux line (6) after mixing into compressed gas channel (804) with compressed gas
It is discharged into flue again.
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