CN107677317A - Flue dust gas sampling comprehensive detection system - Google Patents
Flue dust gas sampling comprehensive detection system Download PDFInfo
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- CN107677317A CN107677317A CN201711025865.3A CN201711025865A CN107677317A CN 107677317 A CN107677317 A CN 107677317A CN 201711025865 A CN201711025865 A CN 201711025865A CN 107677317 A CN107677317 A CN 107677317A
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- 238000001514 detection method Methods 0.000 title claims abstract description 70
- 238000005070 sampling Methods 0.000 title claims abstract description 26
- 239000003500 flue dust Substances 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 102
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 238000007689 inspection Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000009826 distribution Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000009530 blood pressure measurement Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 7
- 238000012545 processing Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000008896 Opium Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229960001027 opium Drugs 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of flue dust gas sampling comprehensive detection system, including industrial computer, the input of the industrial computer is connected to flow detection module, temperature-measuring module, pressure detecting module, atmosphere measuring module, flue gas inspection module, flow rate detection module.The present invention is realized on a platform to being examined and determine and being calibrated in all parameters, ensure the accuracy of continuous data, calibrating efficiency is increased substantially, smoke dust sampling instrument integrated measuring is more accurate, quick, compensate for the blank in domestic smoke dust sampling instrument calibrating field.The of the invention detecting system performance can detect the various performance parameters of the pollution sources sampler such as smoke flue gas sampling device in all directions entirely, integrated measuring is implemented to indexs such as temperature, flue-gas temperatures before the atmospheric pressure of tested instrument, flow, environment temperature, meter so that smoke dust sampling instrument integrated measuring is more accurate, quick.
Description
Technical field
The present invention relates to measuring and testing device technical field, more particularly to one kind collection flow detection, pressure detecting, temperature
Detection etc. is a variety of to detect the flue dust gas sampling comprehensive detection system being integrated.
Background technology
Dust collector need to measure specialty through temperature, pressure, flow and chemistry etc. and carry out gauge check, and it is measured at present
It is low that work still suffers from detection efficiency, main weak point following points：
1st, need the different majors such as temperature, pressure, flow and chemistry personnel carry out gauge check work, be related to personnel,
Professional excessive, human cost increases considerably；This project achievement can realize that disposable disposably completes all detection work.
2nd, examination criteria is inconsistent, and temperature, pressure and flow etc. are detected according to respective standard schedule, same device
Provide the certificate of multiple different majors.A certificate need to be only provided by this project, with reference to a standard.
3rd, it is mutual when flue dust gas sampling relevant parameter (temperature, pressure, flow velocity, the flow and flue gas content etc.) past is detected
It is independent to carry out, it is orthogonal.And this item detection parameter can simultaneously dynamic detection.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, and provide it is a kind of by pressure, flow, temperature,
The detection projects such as chemistry, flow velocity are combined as a set of integrated system, realize the multiple parameters rapid verification to flue dust (gas) sampler,
Detection integration is realized, improves the flue dust gas sampling comprehensive detection system of the calibrating degree of accuracy and efficiency.
To achieve the above object, flue dust gas sampling comprehensive detection system provided by the invention, including industrial computer, the work
The input of control machine be connected to flow detection module, temperature-measuring module, pressure detecting module, atmosphere measuring module,
Flue gas inspection module, flow rate detection module.
Timing detection module is provided with the industrial computer.
The flow detection module includes being used to carry the pipeline section of fluid, be arranged on the upper end transducing of pipeline section side upper end
Device, the lower end transducer for being arranged on pipeline section side lower end, upper end transducer and lower end transducer output flow signal to flow are surveyed
Calculate module.
The temperature-measuring module includes stem body stove, the temperature sensor and temperature control device being arranged in stem body stove.
The pressure detecting module includes pressure generating unit and pressure measurement cell, and pressure generating unit includes positive/negative-pressure
Power switching source of the gas, pressure-regulating device and pressure obtaning device.
The flue gas inspection module includes the steel cylinder gas of some branch roads, and the steel cylinder gas on each branch road is connected with steel cylinder gas mark
Air valve, after zero gas is by zero gas transfer valve, valve is cleaned into zero gas all the way, the steel cylinder gas on each branch road is connected with steel cylinder gas mark
Under the control of air valve and the first mass flow controller, distribution is exported after being mixed into the first mixed gas cylinder, another way enters second
After mass flow controller, it is divided into two branch roads, a branch road enters the second mixed gas cylinder, and another branch road enters magnetic valve, pressure regulator valve, limit
Enter the second mixed gas cylinder after discharge orifice, flow sensor, oxygen generator, the distribution of the second mixed gas cylinder output enters the first mixed gas cylinder
Distribution is exported, the distribution of output is the SO of various concentrations2、NO2, CO, contained with the associated gas detected in Air pollen
Amount.
The flow rate detection module includes the axial flow blower of Frequency Converter Control, frequency converter connection phototube coupling unit, axle stream
The model bay of blower fan connects signal condition unit by multiple sensor, and phototube coupling unit and signal condition unit connect
Collection and control system are connected to, the collection is connected with servo controller with control system, and servo controller is by controlling servo
Motor connection angle changing mechanism, instrument output end to be measured are connected to collection and control system, collection and control by signal condition unit
System processed connects industrial computer by bus.
The whole system of the present invention is examined by several module compositions, including flow detection module, pressure detecting module, temperature
Survey the module compositions such as module, flow rate detection module, flue gas inspection module, atmospheric pressure and timing detection.In view of smoke dust sampling instrument
Have plenty of with flue gas analyzer integrated, the data of all modules are uploaded to microcomputer host, and host software will be surveyed
Control and data processing.The measurement of the physical quantitys such as temperature, pressure, flow and the measurement of chemical quantity can due to temperature etc.
It can influence each other, therefore the composition of system will be made up of two racks, detection of the rack for soot fraction, including dynamic pressure,
The detection of the parameter such as pressure, flow, temperature, another rack are used for the detection of flue gas partial before static pressure, meter.
The real-time dynamic calibration of the parameter such as temperature, pressure, flow, atmospheric pressure, flow velocity and flue gas content, flue dust can be adopted simultaneously
All parameters of sample instrument can complete Detection task in a systematic detection means.
Flue dust gas sampling comprehensive detection system provided by the invention, system being capable of the comprehensive detection flue dust cigarettes of performance entirely
The various performance parameters of the pollution sources sampler such as gas sampling, pressure, atmospheric pressure, stream before the dynamic pressure, static pressure, meter to tested instrument
The index such as temperature, flue-gas temperature, the air-tightness of instrument, flue gas concentration implements the dynamic of integration before amount, flow velocity, environment temperature, meter
State measures (state for simulating on-line monitoring), possesses following innovative point：
(1) integrated innovation
Present system can simultaneously to parameters such as temperature, pressure, flow, atmospheric pressure, flow velocitys when row automatic Verification, flue dust adopts
All parameters that sample instrument is surveyed are examined and determine and are calibrated in a systematic detection means, are related to flow, pressure, temperature
Organic combination and process implementing measure, realize the high level automation of detection.
(2) stable flow detection module
Inside flowmeter detection module by way of being boosted again after voltage stabilizing, make the ultrasonic wave voltage ratio in general of transmission more
Height, signal is stronger, while anti-interference is also improved；Because rational power consumption range controls, by ultrasonic wave during processing
Send number to increase, transmission frequency and sample frequency are accelerated.Changes in flow rate so in runner, it can sample and count more quickly
Count and；Gage requirement scope more civilian than in general is wide in cost, therefore employs meter specially amplification chip so that faint letter
Number multiplication factor can as far as possible increase, simultaneously effective reduce the distortion of signal, improve signal to noise ratio.Finally count to get
Flow it is more stable.
(3) equilibrium temperature verification system is provided
The system uses core component of the stem body stove as temperature detection, and body of heater is from the cylindrical Muffle furnace of customization, stove
Body inner homogeneous parcel high power exchange heater strip is as heating source, and annular brass heat conducting pipe is installed in burner hearth inside, because of its specific heat
Rong great, heat conduction are fast, after originally uneven heating source isolation, are conducted by heat conducting pipe to inner hollow, form stabilization
Thermal field, realize that temperature examines and determine necessary requirement.
(4) system occurs for dynamic pressure
System occurs for the dynamic pressure of innovation, and ± 55kPa pressure generating systems are using multiplication of voltage mensuration and double in the system
Stage pressure genetic method, that is, use ± 30kPa differential pressure pick-up measurement ± 55kPa static pressure, the first order first in specific implementation process
Pressure generating system produces the negative terminal that a reference pressure acts on sensor, after waiting reference pressure stable, the second stage pressure
Pressure within required ± 55kPa directly occurs for generation system, and such design can greatly improve pressure measurement accuracy
And resolution ratio, improve the accuracy of calibrating.
The good effect that the present invention has：The detecting system performance can detect smoke flue gas sampling device etc. in all directions entirely
The various performance parameters of pollution sources sampler, to temperature, flue-gas temperature before the atmospheric pressure of tested instrument, flow, environment temperature, meter
Implement integrated measuring etc. index so that smoke dust sampling instrument integrated measuring is more accurate, quick, realizes on a platform
All parameters are examined and determine and calibrated, ensures the accuracy of continuous data, increases substantially calibrating efficiency, compensate for domestic cigarette
Dirt sampler examines and determine the blank in field.
Brief description of the drawings
Fig. 1 is the overall theory diagram of the present invention；
Fig. 2 is inventive flow meter detection module structure diagram；
Fig. 3 is inventive flow meter detection module schematic block circuit diagram；
Fig. 4 is flow rate detection theory diagram of the present invention；
Fig. 5 is wind tunnel test system diagram of the present invention；
In figure：1st, industrial computer；2nd, flow detection module；3rd, temperature-measuring module；4th, pressure detecting module；5th, atmospheric pressure is surveyed
Measure module；6th, flue gas inspection module；7th, flow rate detection module；8th, timing detection module；2.1st, pipeline section；2.2nd, upper end transducer；
2.3rd, lower end transducer；2.5th, MCU control module；2.6th, button；2.7th, display screen；2.8th, power supply；2.9th, communication module；
2.10th, ultrasonic signal processing module；2.11st, signal transmitting and receiving circuit.
Embodiment
For ease of being better understood from the purpose of the present invention, structure, feature and effect etc., in conjunction with accompanying drawing and specific implementation
The present invention is described in further detail for example.
As shown in figure 1, the flue dust gas sampling comprehensive detection system that the present invention designs, including industrial computer 1, industrial computer 1
Input is connected to flow detection module 2, temperature-measuring module 3, pressure detecting module 4, atmosphere measuring module 5, cigarette
Gas detection module 6, flow rate detection module 7.
Timing detection module 8 is additionally provided with industrial computer 1；Flow detection module 2 includes being used for the pipeline section for carrying fluid
2.1st, it is arranged on the upper end transducer 2.2 of the side upper end of pipeline section 2.1, is arranged on the lower end transducer of the side lower end of pipeline section 2.1
2.3, upper end transducer 2.2 and the output flow signal of lower end transducer 2.3 to flow measuring module.Temperature-measuring module 3 includes
Stem body stove, the temperature sensor and temperature control device being arranged in stem body stove.
Pressure detecting module 4 includes pressure generating unit and pressure measurement cell, and pressure generating unit includes positive/negative pressure
Switch source of the gas, pressure-regulating device and pressure obtaning device.
Flue gas inspection module 6 includes the steel cylinder gas of some branch roads, and the steel cylinder gas on each branch road is connected with steel cylinder gas gas
Valve, after zero gas is by zero gas transfer valve, valve is cleaned into zero gas all the way, the steel cylinder gas on each branch road is connected with steel cylinder gas gas
Under the control of valve and the first mass flow controller, distribution is exported after being mixed into the first mixed gas cylinder, another way enters the second matter
After measuring flow controller, it is divided into two branch roads, a branch road enters the second mixed gas cylinder, and another branch road enters magnetic valve, pressure regulator valve, current limliting
Enter the second mixed gas cylinder after hole, flow sensor, oxygen generator, the distribution of the second mixed gas cylinder output is defeated into the first mixed gas cylinder
Go out distribution, the distribution of output is the SO of various concentrations2、NO2, CO, contained with the associated gas detected in Air pollen
Amount.
Flow rate detection module 7 includes the axial flow blower of Frequency Converter Control, frequency converter connection phototube coupling unit, axial flow blower
Model bay by multiple sensor connect signal condition unit, phototube coupling unit and signal condition unit are connected to
Collection and control system, the collection are connected with servo controller with control system, and servo controller is by controlling servomotor
Connection angle mechanism, instrument output end to be measured are connected to collection and control system by signal condition unit, and collection is with control
System connects industrial computer 1 by bus.
As shown in Figures 2 and 3, flowmeter detection module 2 is including being used to carry the pipeline section 2.1 of fluid, being arranged on pipeline section 2.1
The upper end transducer 2.2 of side upper end, the lower end transducer 2.3 for being arranged on the side lower end of pipeline section 2.1, and flow measuring mould
Block；Flow measuring module includes MCU control module 2.5, MCU control module 2.5 be connected to button 2.6, display screen 2.7,
Power supply 2.8, communication module 2.9, ultrasonic signal processing module 2.10, ultrasonic signal processing module 2.10 are connected with signal receipts
Power Generation Road 2.11, signal transmitting and receiving circuit 2.11 are connected with upper end transducer 2.2 and lower end transducer 2.3 respectively.Operation principle is：
Flow quantity detecting system uses ultrasonic flow, during flow meters work, sends ultrasonic wave downwards to lower end from upper end transducer first
Transducer, and measure the flight time T1 of ultrasonic wave, then switching circuit, from lower end, transducer sends up ultrasonic wave to upper end
Transducer, and measure the flight time T2 of ultrasonic wave.In view of the difference of this two flight time, can by following formula
To draw the speed of fluid.There is speed to calculate flow along with the volume can of pipeline section.The flowmeter detection module of use
Due to being full electronic, no mechanical part, not by mechanical wear, fault impact；And small volume, in light weight, reproducible, pressure
Damage it is small, it is non-aging, make the reliability of product and precision improve it is a lot.
The core that flowmeter detection module 2 measures flow velocity is time-to-digital converter chip and circuit.The chip has high-precision
The time measurement function of degree, resolution ratio reach 65ps, and basic measurement guarantee is provided for the application of time difference method flowmeter；It is built-in
Impulse generator ultrasonic transducer can be directly driven in the flow measurement of pipe with small pipe diameter, without in addition increase driving chip.
Chip collocation MCU and comparator, analog switch element can complete control and the design in time measurement loop.Should
Scheme makes circuit design greatly reduce the PCB surface product of equipment while being simplified, and makes the production of equipment, maintenance also more square
Just it is easy.Power supply is single channel dc source, voltage 12V ± 3V, and electric current is more than 100mA；Power management section mainly filters, surely
The effect such as pressure, inspection pressure；Button and display screen can facilitate the various table intrinsic parameters of real time inspection；Communication module interface is standard
RS485 interfaces, it is mainly used in the communication with host computer；Ultrasonic signal process part is mainly that the signal of reception is filtered
Ripple, the processing such as amplify, compare；Signal transmitting and receiving circuit is mainly the electric signal for producing ultrasonic frequency, and is sent and received logical
The switching repeatedly in road；Transducer mainly converts electrical signals to ultrasonic wave and is dealt into runner, and receives the ultrasound in runner
Ripple signals reverse is converted into electric signal；MCU is key control unit, ensures the normal operation of whole system；Control overall work
Make sequential, and will finally count out flow velocity after various signal transactings.
Flue gas inspection module 6 is entered the gas reference material that can be traced to the source to smoke chemistry amount using automatic distributing calibration system
Row calibrating.Automatic distributing demarcation dynamic gas generator can provide the gas of various concentration, and the gas of these various concentrations can
For the calibration of surrounding air analyzer and pollution monitoring analyzer.The system can calculate dilution ratio automatically, and by micro-
Manage the flow of device control mass flow controller.Realize to various monitoring instrument single-points and multiple spot dynamic calibration, while can receive
Host computer instruction carries out zero point, range calibration.
Zero gas is by zero gas transfer valve respectively with entering mixed gas under the control of three steel cylinder gas gas valves (two three-way electromagnetic valves)
Distribution is exported after bottle mixing.(when cleaning gas circuit, zero gas purge valve is switched to open mode by closing；Zero gas is passed through by steel cylinder
The gas discharge of gas 1, steel cylinder gas 2, residual in the branch road of steel cylinder gas 3, reach the purpose of cleaning gas circuit).
The system also includes providing a set of dynamic gas mixer, and various concentrations are exported by high accuracy mass flowmenter
SO2, NO2, CO etc..
Dilute distribution：Using the mass flow controller of precision come it is accurate control steel cylinder calibrating gas or other source gases and
The mixing ratio of zero air (zero gas) is diluted, so as to which the steel cylinder calibrating gas of high concentration to be diluted to the standard of required concentration with zero gas
Gas.The flow of required calibrating gas flow and diluent gas is calculated by formula (1)：
In formula：CfFor diluent gas ultimate density (gas concentration calibrated to analytical instrument), 1 × 10-6；CbFor mark
Quasi- gas concentration (the concentration nominal value of steel cylinder gas), 1 × 10-6；QOFor diluting gas flow (zero gas), L/min；QbFor Standard Gases
Body flow (steel cylinder Standard Gases), mL/min.
Flow rate detection module 7 carries out the detection of flue dust (gas) sampler velocity parameters using wind-tunnel and standard pitot tube.Stream
Fast detection module 7 includes the axial flow blower of Frequency Converter Control, and loudspeaker are disposed between axial flow blower output end and active section
Mouth wind inlet section, honeycomb screen, stable section, contraction section, active section pass through sensor, angle changing mechanism, Devices to test output detection connection
There are collection and control system.
Wind-tunnel is that energy is artificially generated and control air-flow is to simulate the flowing of object ambient gas, can be used for sampler opium pipe
The detection of middle Pitot tube.Annular low-speed wind tunnel is by quaternary：Hole body portion, power section, Devices to test support and angle system
System, TT＆C system.Theory diagram is as shown in Figure 4：
1) operation principle
Blower fan uses axial fan, by Frequency Converter Control three phase alternating current motor rotating speed, so as to reach needed for active section
Different wind speed.
Pitot tube is arranged on the second active section, and Pitot tube pitot hole should be aligned to drift angle<± 3 °, the first active section wind
Speed is equal to the second active section wind speed divided by shrinkage ratio.
When Pitot tube measures wind speed, actual wind speed value is calculated as follows：
In formula:Vs is model bay actual wind speed value, m/s；P is to survey dynamic pressure value, Pa；K is coefficient of Pitot tube；ρ is
Atmospheric density, kg/m3；P0 is laboratory's atmospheric pressure, Pa；T is air themperature in wind-tunnel, DEG C.
2) wind-tunnel computer automatic data collection and processing system
The hardware architecture diagram of wind tunnel test system is as figure 5 illustrates：
System hardware is made up of part of data acquisition and control section, and part of data acquisition is by acquisition module, pressure difference sensing
The parts such as device, signal condition are formed.Control section is by several portions such as photoisolator, frequency converter, axial fan, servomotor
Point.Sensor (humiture, atmospheric pressure, pressure etc.), signal processing apparatus, data acquisition measuring device and data handling system etc.
Measurement processing system is formed, wind tunnel test data are acquired, measured, analyzed and located under the control and management of computer
Reason.
Invention also provides the function of air pressure and timing detection to use pressure sensor of the resolution for 50Pa, through electricity
After the enhanced processing of road, linearly corrected by software, carry out the calibration of atmospheric pressure.In atmosphere pressure sensor measurement range respectively
80kPa, 90kPa, 100kPa, 110kPa or so totally four points are chosen, corresponding standard is produced using pressure generator
Pressure Ps(in the case where considering live atmospheric pressure), while read monitor atmospheric pressure show value Pc。
By the use of resolution ratio be 0.01s electronic stopclocks as timing criteria, had the clock of the monitor of clocking capability same
When Shi Jilu is walked, minute is no less than 1h, and records its result.
In formula：δt--- timing error；
ti--- monitor clock timing, s；
ts--- electronic stopclock timing, s.
The detecting system of the present invention can full performance it is comprehensive detect the pollution sources sampler such as smoke flue gas sampling device
Various performance parameters, dynamic pressure, static pressure to tested instrument, temperature, flue gas before meter preceding pressure, atmospheric pressure, flow, environment temperature, meter
The indexs such as temperature implement integrated measuring.System and stem body are occurred using advanced ultrasonic flow measuring method, automatic pressure
Furnace temperature measuring system so that smoke dust sampling instrument integrated measuring is more accurate, quick.Realize on a platform to all
Examined and determine and calibrated in parameter, ensured the accuracy of continuous data, increase substantially calibrating efficiency, compensate for domestic flue dust and adopt
Sample device examines and determine the blank in field.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
In the right of invention.
Claims (7)
- A kind of 1. flue dust gas sampling comprehensive detection system, it is characterised in that：Including industrial computer (1), the industrial computer (1) it is defeated Enter end and be connected to flow detection module (2), temperature-measuring module (3), pressure detecting module (4), atmosphere measuring module (5), flue gas inspection module (6), flow rate detection module (7).
- 2. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that：In the industrial computer (1) It is provided with timing detection module (8).
- 3. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that：The flow detection module (2) including being used to carry the pipeline section (2.1) of fluid, the upper end transducer (2.2) for being arranged on pipeline section (2.1) side upper end, setting Lower end transducer (2.3) in pipeline section (2.1) side lower end, upper end transducer (2.2) and lower end transducer (2.3) output flow Signal is to flow measuring module.
- 4. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that：The temperature-measuring module (3) stem body stove, the temperature sensor and temperature control device being arranged in stem body stove are included.
- 5. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that：The pressure detecting module (4) pressure generating unit and pressure measurement cell are included, pressure generating unit includes positive/negative pressure switching source of the gas, pressure regulation dress Put and pressure obtaning device.
- 6. flue dust gas sampling comprehensive detection system according to claim 2, it is characterised in that：The flue gas inspection module (6) the steel cylinder gas of some branch roads is included, the steel cylinder gas on each branch road is connected with steel cylinder gas gas valve, and zero gas is inputted by zero gas After valve, valve is cleaned into zero gas all the way, the steel cylinder gas on each branch road is connected with steel cylinder gas gas valve and the first mass flow control Under the control of device processed, distribution is exported after being mixed into the first mixed gas cylinder, after another way enters the second mass flow controller, is divided into Two branch roads, a branch road enter the second mixed gas cylinder, and another branch road enters magnetic valve, pressure regulator valve, metering hole, flow sensor, oxygen Enter the second mixed gas cylinder after generator, the distribution of the second mixed gas cylinder output enters the first mixed gas cylinder output distribution, the distribution of output For the SO of various concentrations2、NO2, CO, to detect the associated gas content in Air pollen.
- 7. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that：The flow rate detection module (7) axial flow blower of Frequency Converter Control is included, frequency converter connection phototube coupling unit, the model bay of axial flow blower passes through more Road sensor connection signal condition unit, phototube coupling unit and signal condition unit are connected to collection and control system, institute State collection and be connected with servo controller with control system, servo controller is to be measured by controlling servomotor connection angle mechanism Instrument output end is connected to collection and control system by signal condition unit, and collection is connected industry control with control system by bus Machine (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025865.3A CN107677317A (en) | 2017-10-27 | 2017-10-27 | Flue dust gas sampling comprehensive detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711025865.3A CN107677317A (en) | 2017-10-27 | 2017-10-27 | Flue dust gas sampling comprehensive detection system |
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| CN109816936A (en) * | 2018-12-29 | 2019-05-28 | 航天神洁(北京)科技发展有限公司 | A kind of gas safety monitoring device for hydrogen plasma coal acetylene |
| CN109991138A (en) * | 2019-04-09 | 2019-07-09 | 上海北分科技股份有限公司 | It is a kind of to utilize dust wind tunnel system test method |
| CN110044678A (en) * | 2019-05-27 | 2019-07-23 | 河北鸿海环保科技有限公司 | Flue gas monitoring system Quality Control device and distribution dilution process |
| CN114813255A (en) * | 2022-05-17 | 2022-07-29 | 宁波市计量测试研究院(宁波新材料检验检测中心) | Calibrating device and method for fluoride sampler |
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| CN114813255A (en) * | 2022-05-17 | 2022-07-29 | 宁波市计量测试研究院(宁波新材料检验检测中心) | Calibrating device and method for fluoride sampler |
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