CN102778445A - Intelligent analyzer and detection method for standard state dry basis - Google Patents
Intelligent analyzer and detection method for standard state dry basis Download PDFInfo
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- CN102778445A CN102778445A CN2012102999270A CN201210299927A CN102778445A CN 102778445 A CN102778445 A CN 102778445A CN 2012102999270 A CN2012102999270 A CN 2012102999270A CN 201210299927 A CN201210299927 A CN 201210299927A CN 102778445 A CN102778445 A CN 102778445A
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Abstract
The invention discloses an intelligent analyzer and a detection method for a standard state dry basis, and belongs to the field of gas detection analyses. The intelligent analyzer comprises a sensing and measuring unit, a heating control unit, a data collecting and processing unit and an output display communication unit, wherein the heating control unit and the sensing and measuring unit are positioned in a same closed cavity chamber; and the peripheries of the heating control unit and the sensing and measuring unit are separated from the data collecting and processing unit and the output display communication unit through a heat insulating plate. The detection method comprises the following steps of: demarcating zero gas, and detecting sample gas, so as to obtain a wet basis volume value under a nonstandard state of measured gas; measuring parameters of fume, and changing the parameters into volume values under a standard state and converting to be a value of a standard state dry basis concentration. According to the intelligent analyzer and the detection method, the gaseous pollutant standard state dry basis concentration is directly output, the service life of the analyzer is prolonged, and functions of diagnosing the running state of the analyzer can in real time can be realized; and the detection method solves the problems that the condition that measured values of the analyzer can meet the China environmental standard, the condition that an instrument is easy to damage under a complicated working condition, and the reality reliability of the measured values of the analyzer are ensured, and the like can be solved.
Description
Technical field
The present invention relates to the automatic monitor for continuously device of the multicomponent gas of pollution source discharging flue gas, be specially a kind of mark attitude butt intelligent analytical instrument and detection method.
Background technology
The Environmental Protection in China standard code in the flue gas concentration of pollutant be the content of pollutant in the dry flue gas under the standard state; Like " thermal power plant's air pollution emission standard " regulation " flue gas is 273K in temperature; the state when pressure is 101325Pa; be called for short ' mark attitude ', in this standard under the accurate state of the equal index of atmospheric pollution substrate concentration of defined the numerical value of dry flue gas ".
Fume component analysis is a complicated problem that involves a plurality of subjects, not only need guarantee smoke components accuracy of detection and stability, also need consider the influence that various factors is analyzed flue gas composition.Consider the influence that factors such as water capacity in the flue gas, temperature, particle detect flue gas composition; Flue gas needed it is carried out pre-service before getting into flue gas analyzer, reduced the influence that factors such as water capacity, temperature, particle detect flue gas composition as much as possible.Because domestic later relatively to pretreatment unit research starting, even do not form the Quality Control requirement of pretreatment unit complete, that quantize, cause practical operation in service, can't the quantitative evaluation pretreatment unit to the flue gas effect.Particularly the size of water capacity is huge to pollutant detection accuracy and the influence of analysis meter inherently safe in pretreated flue gas.
Flue gas analyzer is (CEMS in the continuous monitoring exhaust system; Continuous Emission Monitoring System) core ingredient; It is to appraise and decide the important evidence of the total amount of pollutant to the gaseous contaminant monitoring result, is the technical support that total amount reduces discharging.Existing flue gas analyzer is just directly measured the component to be measured in the flue gas after the pre-service; Do not consider that moisture is to the influence of measurement result in the flue gas; Not enough below existing: (1) flue gas analyzer long term monitoring contains the flue gas of a certain amount of moisture of non-quantized measurement; The pollutant levels of surveying are not considered the influence of humidity of flue gas, finally influence the accuracy of pollutant discharge amount; (2) corrosive gas in the flue gas such as SO
2, NOx meets water and generates acidic materials, and flue gas analyzer self is produced harm, cause measuring error and shorten service life of equipment; (3) do not consider of the influence of instrumentation temperature, be difficult to guarantee under constant temperature, to measure measurement result; (4) lack flue gas analyzer running status normal diagnosis ability whether, still be regarded as normally like the corrosion of gaseous contaminant sensing measurement chamber, cause measuring result error.
Summary of the invention
1. invent the technical matters that will solve
Can only monitor the gaseous contamination substrate concentration in the flue gas to existing flue gas analyzer; Can't record flue gas gaseous contaminant mark attitude butt concentration to be measured in real time; Shortage is to many deficiencies such as intelligent diagnostics function such as the identification of monitoring equipment running status, fault alarms, and the present invention provides a kind of mark attitude butt intelligent analytical instrument and detection method, has directly to export gaseous contaminant mark attitude butt concentration; Prolong analysis meter serviceable life, to functions such as analyser running status real-time diagnosis.Solved and how to have guaranteed that the instrument measurement value meets the Chinese environmental protection standard, how to avoid the problems such as true and reliable property that under complex working condition instrument is fragile, how to guarantee the analysis meter measured value.
2. technical scheme
A kind of mark attitude butt intelligent analytical instrument comprises sensing and measuring unit, adds thermal control units, data acquisition process unit and output show communication unit; Adding thermal control units and sensing and measuring unit is in the same airtight chamber; All around through showing that with output communication unit separates with thermal insulation board and data acquisition process unit; To prevent thermal loss; And guarantee that sensing and measuring unit work under constant temperature, and sensing is transmitted through signal with measuring unit and is connected with the data acquisition process unit, and while data acquisition process unit will be exported signal and be transferred to and export the demonstration communication unit.
Said sensing and measuring unit comprise flue gas drainage filtration unit, flue gas multiparameter measuring device and gaseous contaminant sensing measurement chamber; The gas outlet of flue gas drainage filtration unit is connected with the air intake opening of flue gas multiparameter measuring device, and the gas outlet of flue gas multiparameter measuring device is connected with the air intake opening of gaseous contaminant sensing measurement chamber.
Smoke mixture to be measured behind pretreatment unit gets into analyser through flue gas drainage filtration unit; Flue gas drainage filtration unit is the device that is provided with water filtration membrane; Can stop that the aqueous water in the flue gas passes through; Prevent the sensor internal of aqueous water entering gaseous contaminant sensing measurement chamber and cause corrosion, other gas pollutants can pass through water filtration membrane in the flue gas;
The flue gas multiparameter measuring device is distributed in the same measurement mechanism humidity sensor, first temperature sensor and pressure transducer are integrated; Can measure humidity of flue gas, temperature, pressure three parameters simultaneously; Both optimized integral layout; Reduce cost, also consider the cross influence between different parameters, prevent that the fusion of different measuring system from bringing bigger systematic error.Through the optimization setting between the sensor; Measure humidity of flue gas; Deducted the interference of steam to other component gas to be measured; Improve sensitivity and accuracy that flue gas analyzer detects, the mark attitude butt concentration of accurately converting out gaseous contaminant to be measured in conjunction with parameters such as flue-gas temperature, flue gas pressures through the software analysis computing system;
The sensor of said gaseous contaminant sensing measurement chamber is a microfluidic sensor, and said microfluidic sensor is SO
2Sensor, NO sensor, NO
2Sensor, CO sensor or O
2Any two or more combinations of sensor; Adopt series system that different sensors is integrated; The gas outlet of flue gas multiparameter measuring device is connected with the air intake opening of first sensor through the air intake opening of gaseous contaminant sensing measurement chamber; Gas outlet and air intake opening between the neighboring sensors interconnect, and the gas outlet of last sensor is connected with intelligent flue gas analyser gas outlet.Portion gas can adopt the double-range analytical technology, like SO
2Adopt the height double-range, both guaranteed the high sensitivity of analyser, enlarge range of dynamic measurement again.
The said thermal control units that adds comprises heating module, second temperature sensor and heat abstractor; Heating module inserts heat sink interior; Through heat conduction spread heat is arrived heat abstractor, heat abstractor can add strong convection heat is evenly distributed in the confined space, and second temperature sensor is contained in airtight chamber's other end; The temperature of real-time induction sealing chamber also feeds back to heating module, realizes temperature controlling.Adding thermal control units, sensing and measuring unit is in the same airtight chamber; All around through separating with thermal insulation board; The temperature closed loop method that adopts the heat effect of heating module to combine with the thermolysis of heat abstractor guarantees that flue gas pre-service and measuring chamber and gaseous state pollutant measurement unit work under temperature constant state, one side improves the stability of flue gas analyzer self; Avoid steam condensation under the low temperature on the other hand, prevent steam and sour gas (as: SO to be measured
2, NOx) combine to form acidic materials, improve accuracy and corrosion resistivity that checkout equipment is measured.
Said data acquisition process unit comprises that front end data acquisition circuit, signal amplify conversion circuit, software processes analytic system.Said front end data acquisition circuit; The analog or digital signal that pick-up transducers sends, signal amplify conversion circuit and carry out the amplification filtering of hardwareization, the unified digital signal that changes into to gathering the signal that comes; The software processes analytic system is carried out digital filtering to the digital signal after transforming; And combine sensor output temperature, humidity, the pressure parameter in the flue gas multiparameter measuring device, and calculating mark attitude butt concentration, translation method is following:
In conjunction with definition and the The Ideal-Gas Equation of environmental protection standard to the mark attitude; Can realize directly exporting gaseous contaminant mark attitude butt concentration through following steps; With gaseous contaminant sensing measurement chamber output range unit be 1,000,000/volume number (the volume number of contained pollutant in the air of 1,000,000 volumes ppm) is example:
The Ideal-Gas Equation:
The first step: measure each parameter of flue gas, the volume number of humidity of flue gas, temperature, pressure and the tested pollutant of flue gas;
Second step: with the volume number conversion of the tested pollutant of flue gas is the volume number (ppm) under the standard state;
The 3rd step: tested pollutant unit converts mass concentration (mg/m into by volumetric concentration with flue gas under the standard state
3);
The 4th step: the tested pollutant wet basis of flue gas under standard state concentration conversion is mark attitude butt concentration.
In conjunction with above-mentioned 4 steps, the conversion formula of gaseous contaminant mark attitude butt is following:
Wherein, V
wThe volume number of tested pollutant in the flue gas under the-standard state, ppm;
V
xThe volume number of tested pollutant in the flue gas under the-off-rating, ppm;
T-flue-gas temperature, ℃;
P-flue gas pressures, Pa;
C
wGaseous state polluter amount concentration under the-standard state, mg/m
3
M-gaseous contaminant molecular weight;
C
dThe concentration value of tested pollutant in the dry flue gas under the-standard state, mg/m
3
Xsw-smoke moisture, percent by volume, %.
1. said software processes analytic system is extracted each and is measured channel information, like humidity of flue gas, cigarette temperature, cigarette pressure, each component concentration to be measured etc., Treatment Analysis is carried out in Information Monitoring, and the gaseous contaminant concentration conversion is mark attitude butt concentration; 2. have intellectual status diagnosis and alarm function, when being lower than the flue gas analyzer working temperature like flue-gas temperature to be measured, start heating and heat sinking function automatically, assurance sensing and measuring unit are worked under temperature constant state; When humidity of flue gas to be measured is higher than the preset moisture content values of flue gas analyzer; For avoiding the condensation of low temperature steam and preventing that moisture from combining to form acidic materials with corrosive gas; To start the anticorrosion anti-warning function of coagulating; The assurance flue gas analyzer is being worked in normal water capacity scope, improves the accuracy of measurement and the serviceable life of equipment;
Said output shows communication unit; Comprise display screen, communication output serial ports and communication unit; Be used for becoming the numerical value of human-computer interaction interface to show or the general transmission signal output conversion of signals of data acquisition process unit, realize 1. showing tested component concentrations value in the current flue gas, show monitoring gaseous contaminant trend map over time; 2. data storage and memory function, tested component concentrations value in the real-time storage flue gas generates pollution source monitoring component database automatically, differentiates concentration of component to be measured automatically and has or not the situation of exceeding standard; 3. the wire/wireless data-transformation facility is informed the user with the form of note or mail with flue gas analyzer equipment running status and smoke pollution measurement situation to be measured, has remote monitoring function.
A kind of detection method of marking attitude butt intelligent analytical instrument the steps include:
The first step: zero gas is demarcated: mark attitude butt intelligent analytical instrument at first feeds zero gas, carries out zero point correction, passes through the light intensity I of reference cell when utilizing microfluidic sensor to record zero gas
GinsengWith light intensity I through sample cell
0, draw the transmissivity T of monochromatic light through reference cell according to the data acquisition process unit of mark attitude butt intelligent analytical instrument
Ginseng=I
Ginseng/ I
0Said microfluidic sensor adopts the miniflow pneumatic principle, has inside and outside two air chambers, and inside be absorption chamber, and outside is to compensate air chamber, is provided with platinum filament and pneumatic pyroelectric detector in the very thin passage between the inside and outside air chamber.Microfluidic sensor described in this device is the various gaseous contaminant sensors in the gaseous contaminant sensing measurement chamber, like SO
2Sensor, NO sensor etc.
Second step: appearance gas detects: mark attitude butt intelligent analytical instrument feeds appearance gas; Carrying out operate as normal detects; Record through the light intensity I behind the sample cell through microfluidic sensor, calculate the transmissivity T=I/I of monochromatic light through software processes analytic system in the mark attitude butt intelligent analytical instrument again through sample cell
0
The 3rd step: obtain wet basis volume number under the measurement gas off-rating: Vx=(logT/logT by formula
Ginseng) V
Ginseng, obtain to treat test sample gas gas concentration value Vx through the software processes analytic system;
The 4th step: measure each parameter of flue gas; Appearance gas is through behind the flue gas measuring multiple parameters chamber; Temperature, pressure and the water capacity of detected sample gas will be exported in flue gas measuring multiple parameters chamber, and appearance gas gets into the gaseous contaminant measuring chamber, and each gaseous contaminant sensor detects output appearance gas product to appearance gas in the gaseous contaminant measuring chamber; Like SO2 sensor output SO2 volume number, NO sensor output NO volume number (wet basis volume number under the off-rating) (wet basis volume number under the off-rating);
The 5th step: with the volume number conversion of the tested pollutant of flue gas is the volume number (ppm) under the standard state;
The 6th step: tested pollutant unit converts mass concentration (mg/m into by volumetric concentration with flue gas under the standard state
3);
The 7th step: the tested pollutant wet basis of flue gas under standard state concentration conversion is mark attitude butt concentration.
3. beneficial effect
The present invention marks on the attitude butt intelligent analytical instrument device structure and optimizes, and has characteristics such as simple in structure, portable, extensibility, in measurement result, prevent that flue gas condensing from prolonging aspect such as service life of equipment and having obtained beneficial effect:
(1) organically combines based on flue gas moisture technology and gaseous contaminant sensing measurement technology; Can directly export gaseous contaminant mark attitude butt concentration; Meet the Environmental Protection in China requirement, avoided the traditional measurement device possibly need the monitoring equipment of a plurality of independent operatings simultaneously, reduced systematic measurement error;
(2) has equipment running status intelligent diagnostics function; Change adjustment function of temperature control and the anticorrosion anti-early warning of coagulating automatically based on flue gas composition to be measured; Assurance equipment operating temperature is constant; And avoided the steam condensation to combine to form acidic materials with corrosive gas; The equipment that effectively prevents is avoided acid liquid corrosion and is damaged; Not only prolong service life of equipment, also guaranteed the accuracy of measurement data;
(3) data storage and memory function generate component database to be measured automatically, differentiate the situation that exceeds standard automatically, have reduced field personnel's workload;
(4) adopt the remote monitoring technology of Internet of things, equipment running status and pollutant monitoring result to be measured are informed the user, can realize unattended function with modes of intelligence transmission such as note, mails.
Description of drawings
Fig. 1 is the workflow diagram of mark attitude butt intelligent analytical instrument.
Fig. 2 is the topology layout figure of embodiment 1 mark attitude butt intelligent analytical instrument.
Fig. 3 is embodiment 1 a mark attitude butt intelligent analytical instrument structure schematic top plan view.
Wherein: the SO of gaseous contaminant sensing measurement chamber 1
2Sensor; 2 flue gas drainage filtration units; 3 flue gas multiparameter measuring devices; 4 data acquisition process unit; The oxygen sensor of gaseous contaminant sensing measurement chambers 5; 6 display screens; 7 buttons; 8 cabinets; 9 mainboard fixed frames; 10 main circuit boards; 11 thermal insulation boards; 12 add thermal control units; 13 communication units; 14 flaps; 15 gas connection fixed supports; 16 power supplys are flap fixedly; 17 electric power systems; 18 attaching plugs; 19 air intake openings; 20 gas outlets; 21 communication serial ports.
Embodiment
Embodiment 1
Mark attitude butt intelligent analytical instrument workflow synoptic diagram as shown in Figure 1 mainly is made up of air path part and circuit part, laterally is the air path part process flow diagram, vertically is circuit part (being mainly electric signal) schematic flow sheet.Process of gas path is that flue gas is successively through flue gas drainage filtration unit; The aqueous water that possibly generate in the filtering gas circuit; Again through the flue gas multiparameter measuring device; Sensor senses in the flue gas multiparameter measuring device also transmits and measures temperature, humidity and pressure signal, through gaseous contaminant sensing measurement chamber, records the flue gas composition concentration signal at last.The circuit part flow process comprises that mainly data acquisition process unit and output show communication unit; The data acquisition process unit goes out to deliver to signal with each sensor to carry out the acquisition process analysis and is converted into mark attitude butt concentration value; And be transferred to output display communication unit; The concentration value of measuring is presented on the display screen, and exports with the form of 4～20mA or digital signal.Add thermal control units and sensing and measuring unit and be in the same airtight measurement chamber, show that with thermal insulation board and data acquisition process unit, output communication unit separates all around, prevent thermal loss, assurance sensing and measuring unit are worked under constant temperature.
The analyser structure comprises cabinet 8 like Fig. 2, shown in 3, the SO of gaseous contaminant sensing measurement chamber
2Sensor 1, flue gas drainage filtration unit 2, flue gas multiparameter measuring device 3; Data acquisition process unit 4, the oxygen sensor 5 of gaseous contaminant sensing measurement chamber adds thermal control units 12; Communication unit 13, electric power system 17, mainboard fixed frame 9; Gas connection fixed support 15, attaching plug 18 parts such as grade.Wherein, cabinet 8 adopts aluminum alloy material cabinet, the SO of gaseous contaminant sensing measurement chamber
2Sensor 1 is for measuring the SO of range at 0～5000ppm
2Sensor, flue gas multiparameter measuring device 3 with first temperature sensor, pressure transducer, humidity sensor is integrated is distributed in the same device, first temperature sensor is PT100; The data acquisition process unit comprises that front end data acquisition circuit, signal amplify conversion circuit, software processes analytic system; Output shows that communication unit comprises display screen 6, button 7, communication unit 13, communication serial ports 21, and wherein display screen adopts 5 cun display screens, and button 7 adopts and touches button, and communication serial ports 21 is the RS232 interface.
The SO of gaseous contaminant sensing measurement chamber
2Sensor 1, flue gas drainage filtration unit 2, flue gas multiparameter measuring device 3, add thermal control units 12, the oxygen sensor 5 of gaseous contaminant sensor measurement chamber, data acquisition process unit 4 and be fixed on cabinet 8 base plates; The air inlet/outlet of communication unit 13, mark attitude butt intelligent analytical instrument is installed on cabinet 8 rear panels, and display screen 6, button 7 are positioned on the case front panel.The SO of gaseous contaminant sensing measurement chamber
2Sensor 1, flue gas drainage filtration unit 2, flue gas multiparameter measuring device 3, add thermal control units 12 and be in the same chassis space; Separate with oxygen sensor 5, the data acquisition process unit 4 of thermal insulation board 11 with gaseous contaminant sensing measurement chamber; Communication unit 13 usefulness flaps 14 separate with sensing and measuring unit; Electric power system 17 usefulness power supplys fixedly flap 16 separate with sensing and measuring unit; This has just guaranteed sensing and measuring unit, add thermal control units 12, the air inlet/outlet of mark attitude butt intelligent analytical instrument forms the space of sealing, adopts the airtight method of temperature to guarantee that sensing and measuring unit work under constant temperature.
1) air-channel system
Flue gas to be measured inputs to the air intake opening of flue gas drainage filtration unit 2 from air intake opening 19; Flue gas drainage filtration unit 2 is for being provided with the device of water filtration membrane; Inner water filtration membrane can stop that the aqueous water in the flue gas passes through; Prevent aqueous water entering sensor internal and cause corrosion, flue gas can pass through water filtration membrane, and the gas outlet of drainage filtration unit 2 is connected with the air intake opening of flue gas multiparameter measuring device 3; Flue gas multiparameter measuring device 3 is integrated in one with humidity sensor, temperature sensor and pressure transducer, measures humidity of flue gas, flue-gas temperature, 3 parameters of flue gas pressures simultaneously.The outlet of flue gas multiparameter measuring device 3 is through the SO of flexible pipe and gaseous contaminant sensing measurement chamber
2The air intake opening of sensor 1 links to each other, the SO of gaseous contaminant sensing measurement chamber
2Sensor 1 outlet is connected with the air intake opening of the oxygen sensor 5 of gaseous contaminant sensing measurement chamber; The gas outlet of the oxygen sensor 5 of gaseous contaminant sensing measurement chamber is connected with the gas outlet 20 of mark attitude butt intelligent analytical instrument, gas emptying after whole component tests to be measured finish.
2) data acquisition process unit
The data acquisition process unit comprises that front end data acquisition circuit, signal amplify conversion circuit, software processes analytic system; The front end data acquisition circuit is made up of electric power system 17 and main circuit board 10; Electric power system 17 provides all power supplys of front end system, comprise digital circuit power supply 5V switch voltage-stabilizing source, ± 15V simulates source of stable pressure; Main circuit board 10 is major parts of front end data acquisition circuit, adopts the conversion chip with 16 measuring accuracy.Signal amplifies conversion circuit and comprises extremely composition such as slow start-up control circuit of ultraviolet light photo conversion of signals and analog to digital conversion circuit, temperature-control circuit, electrochemistry oxygen sensor acquisition circuit, light source voltage stabilizing, and the UV signal detecting plate is mainly realized UV signal detection, amplification, filtering and AD sampling.Sampled signal is delivered to the software processes analytic system and carries out the data analysis processing, is converted to SO
2Mark attitude butt concentration.The software processes analytic system is that hardware system is controlled, and accomplishes data acquisition, processing and concentration conversion, intelligent diagnostics monitoring equipment running status, and the concentration value of real-time storage pollutant to be measured, and the concentration value that calculates exported to show communication unit etc.
3) output shows communication unit
Output shows that communication unit comprises compositions such as display screen 6, button 7, communication unit 13, communication output serial ports 21; Wherein display screen adopts 5 cun display screens; Button 7 adopts and touches button, and communication output serial ports 21 is the RS232 interface, and output demonstration communication unit can be realized following function:
Presentation Function: show SO in the current flue gas
2The mark attitude butt concentration value of component, demonstration monitoring gaseous contaminant SO
2Trend map over time;
Data storage and memory function: tested component concentrations value in the real-time storage flue gas, generate pollution source monitoring component database automatically, differentiate concentration of component to be measured automatically and have or not the situation of exceeding standard;
Wireless data transmission function: the form with note or mail is informed the user with flue gas analyzer equipment running status and smoke pollution measurement situation to be measured, realizes the monitoring equipment remote monitoring.
Intelligent diagnostics and alarm function: binding data acquisition process unit, the health degree of judgement monitoring equipment running status; When condensate water appears in gas circuit, start alarm function automatically, and cut off and to stop gaseous contaminant sensing measurement chamber operate as normal, prevent that sensor is because of condensate water and SO
2Cause corrosion and damage in conjunction with producing corrosive substance.
Subsidiary function: the management of measurement result inquiry, output, system operational parameters.
Structure is with embodiment 1, and difference is to mark the SO of attitude butt intelligent analytical instrument
2The measurement range is 0～3000mg/m
3, SO to be measured
2Appearance gas concentration is 1500mg/m
3, concrete measuring process is following:
1, connects mark attitude butt intelligent analytical instrument power supply;
2, demarcate:
(1) Zero calibration: the air intake opening 19 of zero gas with mark attitude butt intelligent analytical instrument is connected, through SO
2Sensor passes through the light intensity I of reference cell when recording zero gas
GinsengWith light intensity I through sample cell
0, draw the transmissivity T of monochromatic light through reference cell according to the data acquisition process unit of mark attitude butt intelligent analytical instrument
Ginseng=I
Ginseng/ I
0Deng the measured value of checking display screen 6 after 10 minutes; Measured value is stabilized in 1ppm, and relative error is 0.03%, satisfy HJ/T76 " technical requirement of fixed pollution source smoke discharge continuous monitor system and detection method " the full scale drift error (≤± 2F.S%) requirement.
(2) demarcation of working to the last minute: with full scale 80% (2400mg/m
3) SO
2Calibrating gas feeds the air intake opening 19 of mark attitude butt intelligent analytical instrument, through SO
2Light intensity I through reference cell when sensor records the gas of full scale 80%
FullWith light intensity I through sample cell
0, draw the transmissivity T of monochromatic light through reference cell according to the data acquisition process unit of mark attitude butt intelligent analytical instrument
Full=I
Full/ I
0, on display screen 6, check measured value; Check the stable back of the measured value record reading of display screen 6, reading is 2402mg/m
3, relative error is 0.06%, satisfy HJ/T76 " technical requirement of fixed pollution source smoke discharge continuous monitor system and detection method " the full scale drift error (≤± 2F.S%) requirement.
Demarcate and finish back entering SO to be measured
2Appearance gas is measured.
3, SO
2Appearance gas detects:
(1) with SO to be measured
2Appearance gas feeds mark attitude butt intelligent analytical instrument air intake opening 19, measures three parameters of temperature, pressure, humidity of treating test sample gas through flue gas measuring multiple parameters chamber, and appearance gas gets into SO again
2Sensor determination calculates the transmissivity T=I/I of monochromatic light through sample cell through software processes analytic system in the mark attitude butt intelligent analytical instrument again through the light intensity I behind the sample cell
0;
4, obtain SO to be measured
2Appearance gas mark attitude butt concentration:, directly obtain SO to be measured through the software processes analytic system by following formula
2Gas mark attitude butt concentration value shows that on display screen 6 measured value is 1501mg/m
3
The sensor of a plurality of gaseous contaminant sensing measurements chamber is integrated in the same cabinet with series system, and like SO2, NO, NO2, CO sensor combination in any, collocation, the data acquisition process unit increases NO, NO
2, the CO signal acquisition channel and concentration conversion, output shows that communication unit increases the functions such as pollutant mark attitude butt kind that show, monitoring equipment has stronger expansibility, other apparatus structures are with embodiment 1.
Embodiment 4
To monitor desulfurization front and back SO simultaneously
2During concentration content, because SO in the flue gas after desulfurization
2Content is low, when single employing wide range sensor is monitored low concentration gaseous pollutant, receives the influence of measuring accuracy; When low concentration, do not detect pollutant, display result is zero, is not inconsistent with actual pollutant levels; Can select height two passages for use; Both guaranteed the high sensitivity of analyser, enlarged range of dynamic measurement again, installed other structures with embodiment 1.
Embodiment 5
Display screen adopts the color touch screen, shows and keypress function in the alternate embodiment 1, installs other structures with embodiment 1.
Embodiment 6
The communication serial ports meets the needs of different users with various ways such as RS485, RS232,4～20mA simulating signal output relevant information, and other apparatus structures are with embodiment 1.
Claims (9)
1. mark attitude butt intelligent analytical instrument for one kind; Comprise sensing and measuring unit, add thermal control units, data acquisition process unit and output shows communication unit; It is characterized in that; The said thermal control units and sensing and measuring unit of adding is in the same airtight chamber; Show that with output communication unit separates through thermal insulation board and data acquisition process unit all around; Sensing is connected with the data acquisition process unit through the signal transmission with measuring unit, and the data acquisition process unit will be exported signal and be transferred to output demonstration communication unit simultaneously, and wherein said sensing and measuring unit comprise flue gas drainage filtration unit, flue gas multiparameter measuring device and gaseous contaminant sensing measurement chamber; The gas outlet of flue gas drainage filtration unit is connected with the air intake opening of flue gas multiparameter measuring device, and the gas outlet of flue gas multiparameter measuring device is connected with the air intake opening of the sensor of gaseous contaminant sensing measurement chamber through the air intake opening of gaseous contaminant sensing measurement chamber.
2. according to the said mark attitude of claim 1 butt intelligent analytical instrument; It is characterized in that; Said flue gas multiparameter measuring device comprises humidity sensor, first temperature sensor and pressure transducer, and described humidity sensor, first temperature sensor and pressure transducer are integrated to be distributed in the same device.
3. according to the said mark attitude of claim 1 butt intelligent analytical instrument, it is characterized in that the sensor of said gaseous contaminant sensing measurement chamber is a microfluidic sensor, said microfluidic sensor is SO
2Sensor, NO sensor, NO
2Sensor, CO sensor or O
2Any two or more combinations of sensor adopt series system that each sensor is together integrated, and the gas outlet of sensor and neighboring sensors air intake opening interconnect, and the gas outlet of last sensor is connected with mark attitude butt intelligent flue gas analyser gas outlet.
4. according to the said mark attitude of claim 1 butt intelligent analytical instrument; It is characterized in that; The said thermal control units that adds comprises heating module, second temperature sensor and heat abstractor, and heating module inserts heat sink interior, and second temperature sensor is contained in airtight chamber's other end; The temperature of real-time induction sealing cavity space also feeds back to heating module, realizes temperature controlling.
5. according to the said mark attitude of claim 1 butt intelligent analytical instrument; It is characterized in that said data acquisition process unit comprises that front end data acquisition circuit, signal amplify conversion circuit, software processes analytic system and temperature and humidity pressure sensor, said front end data acquisition circuit; The analog or digital signal that pick-up transducers sends; Signal amplifies conversion circuit and carries out the amplification filtering of hardwareization to gathering the signal that comes, the unified digital signal that changes into, and the software processes analytic system is carried out digital filtering to the digital signal after transforming; And combine sensor output temperature, humidity, the pressure parameter in the flue gas multiparameter measuring device, calculate mark attitude butt concentration.
6. according to the said mark attitude of claim 1 butt intelligent analytical instrument; It is characterized in that; Said output shows communication unit; Comprise display screen, communication output serial ports and communication unit, be used for becoming the numerical value of human-computer interaction interface to show or the general transmission signal output conversion of signals of data acquisition process unit.
7. according to the said mark attitude of claim 2 butt intelligent analytical instrument, it is characterized in that said flue gas drainage filtration unit is the device that is provided with water filtration membrane.
8. according to the said mark attitude of claim 5 butt intelligent analytical instrument; It is characterized in that; Said software processes analytic system; Measure passage humidity of flue gas, cigarette temperature, cigarette pressure, component concentration to be measured through extracting each, Treatment Analysis is carried out in Information Monitoring, the gaseous contaminant concentration conversion is mark attitude butt concentration; Have intellectual status diagnosis and alarm function simultaneously.
9. according to the said mark attitude of claim 1 butt intelligent analytical instrument, its detection method step is:
The first step: zero gas is demarcated: mark attitude butt intelligent analytical instrument at first feeds zero gas, carries out zero point correction, passes through the light intensity I of reference cell when utilizing microfluidic sensor to record zero gas
GinsengWith light intensity I through sample cell
0, draw the transmissivity T of monochromatic light through reference cell according to the data acquisition process unit of mark attitude butt intelligent analytical instrument
Ginseng=I
Ginseng/ I
0
Second step: appearance gas detects: mark attitude butt intelligent analytical instrument feeds appearance gas; Carrying out operate as normal detects; Record through the light intensity I behind the sample cell through microfluidic sensor, calculate the transmissivity T=I/I of monochromatic light through software processes analytic system in the mark attitude butt intelligent analytical instrument again through sample cell
0
The 3rd step: obtain wet basis volume number under the measurement gas off-rating: Vx=(logT/logT by formula
Ginseng) V
Ginseng, obtain to treat test sample gas gas concentration value Vx through the software processes analytic system;
The 4th step: measure each parameter of flue gas, the volume number of humidity of flue gas, temperature, pressure and the tested pollutant of flue gas;
The 5th step: with the volume number conversion of the tested pollutant of flue gas is the volume number under the standard state;
The 6th step: tested pollutant unit converts mass concentration into by volumetric concentration with flue gas under the standard state;
The 7th step: the tested pollutant wet basis of flue gas under standard state concentration conversion is mark attitude butt concentration
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299927.0A CN102778445B (en) | 2012-08-21 | 2012-08-21 | Intelligent analyzer and detection method for standard state dry basis |
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