CN109959625A - On-line analysis detects SO2The method of content - Google Patents
On-line analysis detects SO2The method of content Download PDFInfo
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- CN109959625A CN109959625A CN201910219406.1A CN201910219406A CN109959625A CN 109959625 A CN109959625 A CN 109959625A CN 201910219406 A CN201910219406 A CN 201910219406A CN 109959625 A CN109959625 A CN 109959625A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
Abstract
A kind of on-line analysis disclosed by the invention detects SO2A kind of method of content, it is desirable to provide safety and stability, the high method of measuring accuracy.The technical scheme is that: SO2The solenoid valve that gas is connected by inlet suction port is fed through the electric T-shaped valve of diaphragm pump connection, controls the electric control circuit of the electric T-shaped valve, and the analyzer controller of connection electric T-shaped valve；Electric T-shaped valve connects photoelectric conversion module and mass flowmenter by cellular glass absorption tube, analyzer controller starts timing, the data that the continuous photoelectric conversion module for reading linking parsing instrument controller is sent, and the continuous data of mass flowmenter, according to the jump of reagent color in cellular glass absorption tube；Electric T-shaped valve is closed in the corresponding instruction of analyzer controller starting, according to the data that time and mass flowmenter measure, calculates the gas volume and tested gas SO after reacting by reagent2Content, and show over the display.
Description
Technical field
The present invention relates to a kind of methods of the content of sulfur dioxide in quickly detection sulphuric acid process, in particular for sulphur
To each stage SO in sour production process2The online content analysis detection method of concentration.
Background technique
Pernicious gas, SO are flooded in the environment of people's life2It is one such.Sulfur dioxide SO2It is most common
Oxysulfide sulfurous anhydride is the main component of sulfuric acid raw material.SO2It is colourless gas, there is intense irritation smell, is atmosphere master
Want one of pollutant.The gas can be sprayed when volcano eruption, and sulfur dioxide can be also generated in many industrial process.Work as titanium dioxide
Sulphur is soluble in water, will form sulfurous acid (main component of acid rain).If in catalyst (such as NO2) in the presence of, SO2Further oxygen
Change, sulfuric acid (H will be generated2SO4), encountering skin can corrode.Therefore, sulfur dioxide can be configured in sulfur dioxide field of employment
Detector is in real time monitored the content of sulfur dioxide at scene, to guarantee the personal safety of operating personnel.
Currently, SO2Detection technique can be divided into iodimetric titration, pararosaniline hydrochloridc colorimetric method, coulometry, conductance method, from
The methods of sub- chromatography, infrared absorption, Ultraluminescence and electrochemical process.Iodimetric titration is earliest national standard method, method detection
Range covering scope is big, and detection is only by H2S gases affect, detection stability are good.But the method needs to sample post analysis, inspection
The survey time is long, and demand of human resources is big.Pararosaniline hydrochloridc colorimetric method, conductance method and coulometry are only suitable for testing in air
SO2Content, detection range 0-10PPM；The chromatography of ions is needed using equipment valuableness, and testing process is complicated；Infrared absorption and purple
Outer fluorescence method is largely used in industrial waste gas on-line monitoring, and technology maturation is reliable.Currently, monitor range can accomplish 10000PPM
The detection of the method portable instrument can be used in left and right, monitoring point within this range.Method is by SO3、H2S, CO and moisture content are dry
It disturbs larger；Electrochemical process largely uses portable instrument, and range can accomplish 10000PPM or so, and this method is by H2S, CO and
Moisture content interference is larger；Electrochemical sensor is consumptive material, and according to detection range, service life about 2 years, more emat sensor price was big
About 60% or so of complete sets of instrument；SO is detected in sulphuric acid process at present2Concentration span is big, analysis time is long, artificial to miss
Poor big, high to testing staff's skill requirement, field condition is poor, live SO2Gas is easy leakage and causes to damage to operator's body
Do harm to and cause danger.
Summary of the invention
The purpose of the present invention is be directed in current sulphuric acid process to detect SO2Concentration span is big, scene SO2Gas is easy
Leakage causes danger to operator and to the demanding problem of testing staff, provides a kind of safety and stability, measuring accuracy is high
Quick detection sulphuric acid process in sulfur dioxide SO2The method of content.
Above-mentioned purpose of the invention can be realized by following measures: a kind of on-line analysis detection SO2The method of content, tool
There is following technical characteristic: SO2The solenoid valve that gas is connected by inlet suction port is fed through the electric three passes of diaphragm pump connection
Valve controls the electric control circuit of the electric T-shaped valve, and the analyzer controller of the connection electric T-shaped valve；It is electronic
Triple valve connects photoelectric conversion module by cellular glass absorption tube and mass flowmenter constitutes on-line analysis SO2The dress of content
It sets；Analyzer controller control electric T-shaped valve makes tested gas source enter cellular glass absorption tube, linking parsing instrument controller
Photoelectric conversion module utilizes fixed wave length light source irradiation absorption pipe, continues to monitor cellular glass and absorbs solution transmittance change in phial
Change, monitor the inflection point of its transmittance variation, when absorbing reagent colour fading in phial according to cellular glass, passes through gas mass flow meter
Gas volume, quickly detect sulphuric acid process in content of sulfur dioxide；Analyzer controller continuously reads photoelectric conversion
The continuous data of data and mass flowmenter that module is sent, is opened according to the jump of reagent color in cellular glass absorption tube
Electric T-shaped valve is closed in dynamic corresponding instruction, according to the data that time and mass flowmenter measure, is calculated and is inhaled by cellular glass
Gas volume and tested gas SO in closed tube bottle after reagent reaction2Content, the sulfur dioxide gas that field monitoring is arrived is dense
Degree is converted into current signal, voltage, frequency standard signal, is shown over the display by RS485 bus.
The present invention has the following effects that compared with the prior art.
It is highly-safe.Solenoid valve of the present invention using connection inlet suction port, the electric T-shaped valve being connected to by diaphragm pump, control
The electric control circuit of the electric T-shaped valve is made, inlet suction port is securely connect with tested gas source, and tail gas absorption uses hydroxide
Sodium as absorbing liquid, by field monitoring to concentration of SO 2 gas be converted into 4-20mA current signal, 0-5V voltage,
The standard signals such as RS485, frequency can have very high safety to avoid the spilling of exhaust gas when manual detection mode sampling.
Stability is high.Photoelectric conversion module of the present invention using the control connection of analyzer controller, photoelectric conversion module benefit
With fixed wave length light source irradiation absorption pipe, continues to monitor solution transmittance in absorption bottle and change, monitor turning for its transmittance variation
Point quickly detects the sulfur dioxide in sulphuric acid process, inspection according to gas volume when fading by gas mass flow meter
The speed and convenience of survey greatly improve.Sample concentration is calculated by formula, and is shown in touch display.Analyzer control
Device starts blowback program, by remaining SO in analyzer pipeline2Gas is blown by the check-valves being connected with the electric T-shaped valve
Enter and fully absorb the sulfurous anhydride and sulfuric anhydride of generation in tail gas absorption bucket, in the sulfuric acid standard solution of sodium hydroxide of generation
With solve artificial detection method operating error, improve the stability of test result.
Accuracy is high.The present invention makes tested gas source enter cellular glass suction using analyzer controller control electric T-shaped valve
The analog signal of the concentration of SO 2 gas monitored is converted into 4-20mA current signal, 0- by closed tube, photoelectric conversion module
The digital signal of the various standards such as 5V voltage, RS485, frequency, while starting timing, continuously reading what photoelectric conversion module was sent
The continuous data of data and mass flowmenter, according to the jump of color in cellular glass absorption tube, the starting of analyzer controller
Corresponding instruction calculates sample concentration, and analysis precision is high, stability is good.Situ concentration span is solved by more than 400ppm to 30
Ten thousand ppm, the problem of manual test test result inaccuracy.
Analysis time is short.The present invention is connected by solenoid valve with inlet suction port, and gas enters pretreatment system, analyzes instrument control
Device processed controls electric T-shaped valve, according to the jump for being tested gas source color is entered in cellular glass absorption tube, passes through all-wave length, high score
Distinguish absorption spectrum, it is easy to switch within the scope of limiting wave length, breakpoint analysis or continuous analysis 0-10ppm and 0-100% concentration
Sulfide in range calculates the gas volume after reacting by reagent and calculates tested gas SO2Content, it is automatic to calculate vulcanization
Object (such as H2S,SO2And mercaptan) concentration, by computer read total sulfur concentration, can accurately measure the dense of each sulfide
Degree, measures the total sulfur content of various ranges, as a result accurately, it is all-round, quickly, favorable reproducibility, entire analysis process is 20 minutes time-consuming,
Analysis time greatly reduced cost much smaller than artificial average analysis required time 1 hour.Overcome prior art analysis
Time is long, and human error is big, and skill requirement is high, needs more people to cooperate, the very high defect of analysis cost.
The present invention can be suitably used for the big SO of concentration span2Gas, from 400ppm to 30 more than ten thousand ppm can accurately measure.
Detailed description of the invention
Fig. 1 is on-line analysis SO of the present invention2The schematic illustration of content device.
The present invention is further illustrated with example with reference to the accompanying drawing, but does not therefore limit the present invention to described reality
It applies among a range.
Specific embodiment
] referring to Fig.1.In the embodiment described below, according to the present invention, a kind of to detect SO in on-line analysis2Content
Method has following technical characteristic: SO2The solenoid valve that gas is connected by inlet suction port is fed through the electricity of diaphragm pump connection
Dynamic triple valve controls the electric control circuit of the electric T-shaped valve, and the analyzer control of the connection electric T-shaped valve
Device；Electric T-shaped valve connects photoelectric conversion module by cellular glass absorption tube and mass flowmenter constitutes on-line analysis SO2Contain
The device of amount；Analyzer controller control electric T-shaped valve makes tested gas source enter cellular glass absorption tube, linking parsing instrument control
The photoelectric conversion module of device processed utilizes fixed wave length light source irradiation absorption pipe, and it is saturating to continue to monitor solution in cellular glass absorption phial
The inflection point for monitoring the variation of its transmittance than variation is penetrated, when absorbing reagent colour fading in phial according to cellular glass, passes through gaseous mass
The gas volume of flowmeter quickly detects the content of sulfur dioxide in sulphuric acid process；Analyzer controller continuously reads light
The continuous data of data and mass flowmenter that electric conversion module is sent, according to reagent color in cellular glass absorption tube
Electric T-shaped valve is closed in the corresponding instruction of jump starting, according to the data that time and mass flowmenter measure, is calculated by porous
Glass absorbs the gas volume and tested gas SO in phial after reagent reaction2Content, the sulfur dioxide that field monitoring is arrived
Gas concentration is converted into the standard signals such as 4-20mA current signal, 0-5V voltage, frequency, is shown in display by RS485 bus
On device.
SO2Online content analysis detection device, including, it is connected to the solenoid valve of inlet suction port, the diaphragm of current limliting needle-valve in parallel
Pump, controls the electric control circuit of electric T-shaped valve, the analyzer controller connected by cellular glass absorption tube.SO2Gas
By inlet suction port and solenoid valve, enter diaphragm pump through acid liquor filter, dust filter unit, then enter through glass rotameter
Electric T-shaped valve, SO2Gas is sent into cellular glass absorption tube by electric T-shaped valve, and cellular glass absorption tube connects photoelectric conversion
Module and mass flowmenter, cellular glass absorption tube tail end protrude into the analyzer controller being connected with photoelectric conversion module, analysis
Instrument controller continuously reads the data of photoelectric conversion module transmission, according in the cellular glass absorption tube of photoelectric conversion module conveying
The data of bound-time and the mass flowmenter metering of color, calculate through the gas after reagent reaction in cellular glass absorption tube
Volume and tested gas SO2Content, and show over the display.
Inlet suction port connects solenoid valve, and solenoid valve connects acid liquor filter and dust filter unit of connecting composition under test gas is pre-
Processing module, under test gas SO2It is pre-processed, the under test gas SO that inlet suction port is entered by solenoid valve control2, through peracid
After liquid filter and dust filter unit acid liquor filtering and dust-filtering, enter using the shunt circuit of current limliting needle-valve and diaphragm pump
Glass rotameter calculates flow.
The calculated flow of glass rotameter enters cellular glass by analyzer controller control electric T-shaped valve and inhales
The SO of closed tube2Gas, while when starting timer, SO2Gas is reacted with the reagent in cellular glass absorption tube occurs color change
Change, photoelectric conversion module judges reaction end according to the color change that reagent reacts, the concentration of SO 2 gas that will be monitored
Analog signal be converted into the digital signals of the various standards such as 4-20mA current signal, 0-5V voltage, RS485, frequency, photoelectricity turns
Digital signal is sent analyzer controller by mold changing block, and the corresponding instruction control electric T-shaped valve of analyzer controller starting closes
It holds one's breath body, calculates tested SO according to the data of time and mass flowmenter2Content, and show over the display.Optional real
It applies in example, display can be touch display.
Electric control circuit includes: the photoelectric conversion module for connecting cellular glass absorption tube, is connected to photoelectric conversion module
Micro-control unit MCU between display, micro-control unit MCU are by CPU, RAM of computer, ROM, timer conter and more
Kind I/O Interface integration on one chip, forms the computer of chip-scale, micro-control unit MCU connection, which has, overcharges protection function
The charge-discharge modules of energy, charge-discharge modules are powered using 48V colloid battery, and charging can do 24, sample every time, detector controller
One sample charge-discharge modules of every analysis are 20 minutes time-consuming, average consumption power 45w/h.Charge-discharge modules are powered configured with battery
Automatic alarm when scarce capacity stops doing the under-voltage protecting circuit of sample.
Check-valves is installed between mass flowmenter and tail gas absorption bucket, is pacified between electric T-shaped valve and tail gas absorption bucket
Loaded check valve.Electric T-shaped valve passes through matter by horizontal valve output end NC connection cellular glass absorption tube, cellular glass absorption tube
The first check-valve of tail gas absorption bucket is led in amount flowmeter F connection, and electric T-shaped valve leads to tail gas by flow divider connection connection
Absorb the second check-valve of bucket.For tail gas absorption using sodium hydroxide solution as absorbing liquid, tail gas absorption bucket is interior to use self-control glass
Glass pipe aeration plate cuts tail gas, is bubbled tail gas uniformly in absorption bucket, the sulfurous anhydride of generation and sulfuric anhydride are sufficiently inhaled
It receives, generates sulfuric acid and neutralized with standard solution of sodium hydroxide.
In an alternate embodiment of the invention, in cellular glass absorption tube reagent include fixed volume sulfamic acid ammonia absorbing liquid,
Starch solution, iodine solution and the distilled water for being added to assigned scale.Take absorbing liquid, starch solution, the iodine solution etc. of fixed volume
Into cellular glass absorption tube, distilled water is added to assigned scale.Start analyzer controller, control electric T-shaped valve is to porous
It is passed through in glass absorption tube containing SO2Gas, SO2Gas is absorbed by liquid absorption, and is reacted with iodine solution, iodine during this
It is constantly consumed, solution colour gradually becomes shallower as, and after iodine runs out of in the solution, solution becomes transparent, light in analyzer controller
Electric conversion module irradiates cellular glass absorption tube using fixed wave length light source, and it is saturating to continue to monitor solution in cellular glass absorption phial
The inflection point for monitoring the variation of its transmittance than variation is penetrated, is jumped according to color when fading, by all-wave length, high-resolution absorbs light
Spectrum switches the sulfide in breakpoint analysis or continuous analysis 0-10ppm and 0-100% concentration range within the scope of limiting wave length,
The gas volume after reagent reaction, which is calculated, by the gas volume of gas mass flow meter calculates tested gas SO2Content.
In an alternate embodiment of the invention, photoelectric conversion module passes through electric T-shaped valve series connection cellular glass absorption tube and quality stream
Meter, the pipe network that electric T-shaped valve links glass rotameter by pipeline and under test gas preprocessing module controls, passes through
Manually open inlet suction port valve and solenoid valve, the SO of production process2Gas pipeline pressure effect under, automatically into
Gas preprocessing module is surveyed, analyzer controller controls glass rotameter and records flow, and control electric T-shaped valve makes to be measured
Gas enters cellular glass absorption tube, and under test gas is pumped into photoelectric conversion module.When under test gas reaches photoelectric conversion mould
Continue to be passed through gas when in block, photoelectric conversion module irradiates cellular glass absorption tube using fixed wave length light source, continues to monitor suction
Solution transmittance variation in bottle is received, the inflection point of its transmittance variation is monitored, according to gas when fading by gas mass flow meter
Body volume, calculates the content of under test gas, and is shown on touch display.Meanwhile analyzer controller issues acousto-optic report
It is alert that operator is reminded to close tested gas source valve.The blowback button finally clicked on analyzer display remains analyzer pipeline
SO2Gas is blown into tail gas absorption bucket.
In an alternate embodiment of the invention, analyzer controller connection has SO2Content analyzer touch display.SO2Content point
Analyzer is ready, and analyzer controller is then to enter under test gas pretreatment process it is first determined whether into process identification,
Time identifier is set according to shortest time interval, it is 20 minutes that the time interval of each time identifier is most short, otherwise returns and prepares
The data initialization of detection into after under test gas pretreatment process, opens electric T-shaped valve, according to work until ready
Make program and cycle detection flow startup time identifier, often detect a new time identifier, starts an analysis process, it will
Each analysis process can be divided into 4 step-by-step procedures, be under test gas pretreatment first；Followed by under test gas enters cellular glass
Absorption tube is reacted with reagent；It is that reagent color jumps in cellular glass absorption tube again, is finally data processing.
In under test gas preprocessing process, opens inlet suction port manually first and solenoid valve, under test gas enter acid solution
Filtering, enters back into dust filter unit, and after completing under test gas pretreatment finally by diaphragm pump, under test gas passes through glass rotors
Flowmeter controls air inflow by electric T-shaped valve, and under test gas enters cellular glass absorption tube, and gas is constantly carried out with reagent
Reaction, when liquid color jumps in cellular glass absorption tube, analyzer controller closes electric T-shaped valve, and is turned according to glass
Subflow meter and mass flowmenter calculate the SO of under test gas2Content data is shown on touch display.
In under test gas pretreatment, solenoid valve control under test gas, it is pre- that under test gas flows under test gas from pipeline
In pipeline in processing system, by, by dust filter unit, then, entering glass by diaphragm pump after an acid liquor filter
Spinner flowmeter, under test gas pretreatment are completed.
Start analyzer, is passed through into cellular glass absorption tube containing SO2Gas, SO2Gas is absorbed by liquid absorption, and and iodine
Solution reacts SO2+H2O=H2SO3, H2SO3+H2O+I2=H2SO4+ HI, iodine is constantly consumed during this, solution face
Color gradually becomes shallower as, and after iodine runs out of in the solution, solution becomes transparent.Photoelectric conversion module is inhaled using the irradiation of fixed wave length light source
Closed tube continues to monitor in absorption bottle solution transmittance and changes, monitors the inflection point of its transmittance variation, according to being passed through porous glass tube
By the gas volume of gas mass flow meter when the gas volume L of absorption tube fades, smoke is calculated by concentration calculation formula
The mass concentration of sulfur dioxide in gas
In formula: I2It is iodine solution concentration (mol/L), V is the volume of cellular glass absorption tube, VOIt is the volume of iodine solution, iodine standard is molten
Liquid (1/2I2) the quite sulfur dioxide (1/2SO of 32:1L 1mol/L2) quality (g)；
Then its sulfur dioxide in flue gas percent concentration are as follows:
In formula: C ' is the mass concentration of sulfur dioxide in flue gas, VmIt is the molal volume (L/ of gas under 1 atmospheric pressure of room temperature
Mol), M is the relative molecular mass of sulfur dioxide.
Tail gas absorption is using sodium hydroxide solution as absorbing liquid.It absorbs in bucket using self-control glass tube aeration plate, cutting
Tail gas makes tail gas according to reaction formula 2NaOH+SO2=Na2SO3+H2O is uniformly bubbled absorbing in bucket.
Above in conjunction with attached drawing to the present invention have been described in detail, it is to be noted that being described in examples detailed above
Preferred embodiment only of the invention, is not intended to restrict the invention, and for those skilled in the art, the present invention can
There are a various modifications and variations, for example process flow and processing sequence can be changed in conjunction with concrete implementation, can select and set identification
Different parameters in the process realize technical method of the invention.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of on-line analysis detects SO2The method of content has following technical characteristic: SO2Gas is connected by inlet suction port
Solenoid valve is fed through the electric T-shaped valve of diaphragm pump connection, controls the electric control circuit of the electric T-shaped valve, Yi Jilian
Connect the analyzer controller of the electric T-shaped valve；Electric T-shaped valve by cellular glass absorption tube connect photoelectric conversion module and
Mass flowmenter constitutes on-line analysis SO2The device of content, analyzer controller control electric T-shaped valve enter tested gas source
The photoelectric conversion module of cellular glass absorption tube, linking parsing instrument controller utilizes fixed wave length light source irradiation absorption pipe, continues
It monitors cellular glass and absorbs solution transmittance variation in phial, monitor the inflection point of its transmittance variation, absorbed according to cellular glass
When reagent fades in phial, by the gas volume of gas mass flow meter, the titanium dioxide in sulphuric acid process is quickly detected
Sulphur concentration；Analyzer controller continuously reads the data of photoelectric conversion module transmission and the continuous data of mass flowmenter, root
Electric T-shaped valve is closed according to the corresponding instruction of jump starting of reagent color in cellular glass absorption tube, according to time and quality stream
The data of meter metering calculate the gas volume and tested gas SO absorbed in phial after reagent reaction by cellular glass2's
Content, by field monitoring to concentration of SO 2 gas be converted into current signal, voltage, frequency standard signal, pass through RS485
Bus is shown over the display.
2. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: inlet suction port connects electromagnetism
Valve, solenoid valve connect acid liquor filter and dust filter unit of connecting composition under test gas SO2Carry out pretreated under test gas
Preprocessing module.
3. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: inlet suction port is by solenoid valve control
Make the under test gas SO entered2, after acid liquor filter and dust filter unit acid liquor filtering and dust-filtering, using current limliting
The shunt circuit of needle-valve and diaphragm pump enters glass rotameter and calculates flow.
4. on-line analysis as claimed in claim 3 detects SO2The method of content, it is characterised in that: glass rotameter calculates
Flow out is entered the SO of cellular glass absorption tube by analyzer controller control electric T-shaped valve2Gas, SO2Gas with it is porous
Color change, the color change judgement reaction that photoelectric conversion module is reacted according to reagent occur for the reagent reaction in glass absorption tube
Terminal, by the analog signal of the concentration of SO 2 gas monitored be converted into 4-20mA current signal, 0-5V voltage, RS485,
The digital signal of the various standards of frequency.
5. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: electric control circuit includes:
Connect the photoelectric conversion module of cellular glass absorption tube, the micro-control unit being connected between photoelectric conversion module and display
MCU, micro-control unit MCU are by CPU, RAM of computer, ROM, timer conter and a variety of I/O Interface integrations in a piece of chip
On, form the computer of chip-scale.
6. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: pretreated under test gas
Cheng Zhong opens inlet suction port manually first and solenoid valve, under test gas enters acid liquor filtering, enters back into dust filter unit, finally
After completing under test gas pretreatment by diaphragm pump, under test gas by glass rotameter, by electric T-shaped valve control into
Tolerance, under test gas enter cellular glass absorption tube, and gas is constantly reacted with reagent, when liquid in cellular glass absorption tube
When body color jumps, analyzer controller closes electric T-shaped valve, and is calculated according to glass rotameter and mass flowmenter
The SO of under test gas out2Content data is shown on touch display.
7. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: pre-processed under test gas
In, solenoid valve control under test gas, under test gas flows into the pipeline under test gas pretreatment system from pipeline, passes through one
By dust filter unit after a acid liquor filter, then, enter glass rotameter, under test gas pretreatment by diaphragm pump
It completes.
8. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: analyzer controller is sentenced first
It is disconnected whether to enter process identification, it is then to enter under test gas pretreatment process, time identifier is set according to shortest time interval, often
It is 20 minutes that the time interval of a time identifier is most short, otherwise returns to the data initialization for preparing detection, until ready, into
After entering under test gas pretreatment process, electric T-shaped valve is opened, according to working procedure and cycle detection flow startup time identifier,
It often detects a new time identifier, starts an analysis process, each analysis process can be divided into 4 step-by-step procedures, it is first
Under test gas pre-processed before this；Followed by under test gas enters cellular glass absorption tube and is reacted with reagent；It is porous again
Reagent color jumps in glass absorption tube, is finally data processing.
9. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: analyzer controller control electricity
Dynamic triple valve is passed through into cellular glass absorption tube containing SO2Gas, SO2Gas is absorbed by liquid absorption, and is occurred instead with iodine solution
It answers, iodine is constantly consumed during this, and solution colour gradually becomes shallower as, and after iodine runs out of in the solution, solution becomes transparent, light
Electric conversion module is jumped according to color when fading, and by all-wave length, High resolution absorption spectroscopy switches within the scope of limiting wave length
Sulfide in breakpoint analysis or continuous analysis 0-10ppm and 0-100% concentration range, passes through the gas of gas mass flow meter
The gas volume that volume calculates after reagent reaction calculates tested gas SO2Content.
10. on-line analysis as described in claim 1 detects SO2The method of content, it is characterised in that: photoelectric conversion module passes through
Electric T-shaped valve series connection cellular glass absorption tube and mass flowmenter, electric T-shaped valve link glass rotameter by pipeline
The pipe network controlled under test gas preprocessing module, by manually opening inlet suction port valve and solenoid valve, production process
SO2Gas is under pipeline pressure effect, and automatically under test gas preprocessing module, analyzer controller controls glass rotors
Cmf record flow, control electric T-shaped valve make under test gas enter cellular glass absorption tube, under test gas are pumped into photoelectricity
In conversion module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002248A (en) * | 2021-11-09 | 2022-02-01 | 中国洛阳浮法玻璃集团有限责任公司 | Monitoring and control method for sulfur dioxide consumption of float glass production line |
| CN114814254A (en) * | 2022-06-22 | 2022-07-29 | 自然资源部第二海洋研究所 | Seawater ammonium nitrogen profile continuous analysis device and analysis method thereof |
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| CN114814254B (en) * | 2022-06-22 | 2022-11-01 | 自然资源部第二海洋研究所 | Seawater ammonium nitrogen profile continuous analysis device and analysis method thereof |
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