CN209656382U - SO in a kind of flue gas3Self-operated measuring unit - Google Patents
SO in a kind of flue gas3Self-operated measuring unit Download PDFInfo
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- CN209656382U CN209656382U CN201920219716.9U CN201920219716U CN209656382U CN 209656382 U CN209656382 U CN 209656382U CN 201920219716 U CN201920219716 U CN 201920219716U CN 209656382 U CN209656382 U CN 209656382U
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Abstract
The utility model relates to Contaminant measurement field, in particular to SO in a kind of flue gas3Self-operated measuring unit.Device in the utility model includes sampling system, collection system, analysis system and control system, flue gas enters in sampling system, sampling system therein, collection system, analysis system are sequentially connected through pipeline, and the equal signal of the sampling system, collection system, analysis system is connected to control system.Sampling system includes sampling gun, filter and compressed air system, and one end of sampling gun is equipped with filter, is also connected with compressed air system through pipeline above the end of sampling gun.The utility model is based on SO in control condensation method trapping flue gas3, acid ion measurement is carried out based on acid base titration, calculates SO in flue gas in conjunction with flue gas sampling volume3Concentration can reduce exhaust gas dust to SO3Measurement influences, improves measurement accuracy and reliability, high degree of automation, easy to operate, the SO suitable for flue gas3Automatic measurement.
Description
Technical field
The utility model relates to Contaminant measurement field, in particular to SO in a kind of flue gas3Self-operated measuring unit.
Background technique
SO3It is the important pollutant in coal-burning power plant, harm are as follows: (1) improve acid dew point, accelerate equipment corrosion, to coal-fired electricity
Factory's safety and economy threaten；(2) increase smoke evacuation opacity or generate blue smoke, the Yi Yinfa masses are to pollution situation
Worry；(3) important precursor that fine particulates are formed aggravates air pollution；(4) ear nose larynx and respiratory system, danger are stimulated
Evil health；(5) with the adsorption potential of mercury competition active carbon, the removal effect of gas mercury is influenced.In view of the foregoing, carry out combustion
Coal-fired plant SO3Administer most important, key is SO in flue gas3Measurement.
SO3Detection technique be always difficult point, SO first3Chemical property is active, easily reacts with the generation of other substances；In cigarette
SO in gas3Concentration relative to SO2Concentration is smaller, and SO2To SO3Measurement have a huge impact, so measurement be also easy to produce mistake
Difference；SO3Sulfuric acid is generated in conjunction with vapor in flue gas, sulfuric acid generates azeotropic mixture in 500 DEG C or less Shi Huiyu water；At a temperature of
When drop, sulfuric acid is easily condensed, and condensed sulfuric acid can be reacted with flue and measurement pipeline generation, causes measurement result relatively low.So that
In in the prior art, SO3Low measurement accuracy, poor reliability, the degree of automation it is not strong.
Utility model content
The purpose of the utility model is to provide SO in a kind of flue gas3Self-operated measuring unit, to solve the above problems.
In order to solve the above technical problems, the utility model adopts the following technical solutions:
SO in a kind of flue gas3Self-operated measuring unit, which is characterized in that including sampling system, collection system, analysis system and
Control system, flue gas 1 enter in sampling system, and sampling system therein, collection system, analysis system are sequentially connected through pipeline,
The equal signal of the sampling system, collection system, analysis system is connected to control system；Wherein sampling system includes sampling gun, mistake
Filter and compressed air system, one end of the sampling gun are equipped with filter, and the end top of the sampling gun is also through pipeline
It is connected with compressed air system；Sampling system further include through the sequentially connected non-return valve of pipeline, flowmeter, aspiration pump, it is described inverse
Only valve is connected to sample collection bottle through pipeline far from one end of flowmeter；Collection system includes condenser, sintered glass filter, surpasses
Grade thermostat water bath, elution liquid container and sample collection bottle, the elution liquid container, condenser, sintered glass filter, sample are received
Collection bottle is sequentially connected with through pipeline, and sintered glass filter is built in the bottom of condenser, one end of the thermostatic water-circulator bath pot
It is connected to through pipeline above the side of condenser, the other end of the thermostatic water-circulator bath pot is connected to the side of condenser through pipeline
Below face, the top of the condenser is also connected to the end of sampling gun through pipeline；Analysis system includes colorimetric device, stirring
Device, marker container and alkali liquor container, the sample collection bottle, marker container, alkali liquor container are filled with colorimetric by the road respectively
Connection is set, is additionally provided with blender below the colorimetric device.
Sampling system is made of sampling gun, filter, compressed air system etc., flue gas heat temperature raising in sampling gun, warp
Filter removes chalk dust removing；After sampling, starting compressed air system backwashes sampling gun and filter；Sampling system
In aspiration pump for extracting flue gas；Flowmeter extracts exhaust gas volumn for calculating；Sampling flue need to be returned in view of exhaust gas, is also set up
Non-return valve prevents the flue gas from playing a reversed role.Collection system by condenser, sintered glass filter, thermostatic water-circulator bath pot, elution liquid container,
Sample collection bottle etc. forms, SO in flue gas3It is trapped by condenser and sintered glass filter, the elution through being flowed out in elution liquid container
Enter sample collection bottle after liquid washing；Wherein, thermostatic water-circulator bath pot is connected with condenser, and condenser is by glass tube and inside
Helix tube composition, glass tube and helix tube exterior space water-filling, are provided by thermostatic water-circulator bath pot, so that condenser is protected
65 DEG C -80 DEG C of constant temperature is held, if temperature is too low, moisture can be condensed, and influence measurement result；If temperature is excessively high, sulfur trioxide
It cannot all trap, influence measurement accuracy.Analysis system is by groups such as colorimetric device, blender, marker container, alkali liquor containers
At extracting a certain amount of leacheate from sample collection bottle and enter colorimetric device and the indicator in marker container is added, starting is stirred
Device is mixed, the lye in alkali liquor container is then added until solution colour is in order setting with given pace.Control system
Logic built module, control sampling system, collection system, analysis system according to each measuring process sequence and acquire movement letter respectively
It number is calculated.
SO in flue gas above-mentioned3Self-operated measuring unit further includes than color light source, and control system is built-in with controller, the ratio
Color light source is electrically connected at controller.The absorbance of wherein colorimetric optical source wavelength 530nm, different colours are different, feedback to control
The signal of device is different, judges titration end-point whereby；Controller is a part of control system, feedbacks and controls titration for signal
Terminal.
SO in flue gas above-mentioned3Self-operated measuring unit further includes valve, is pacified on the sampling gun close to one end of filter
Equipped with valve；Valve is also installed in connecting pipe between the sampling gun and condenser；The condenser and leacheate hold
Connecting pipe between device is also equipped with valve.
SO in flue gas above-mentioned3Self-operated measuring unit further includes peristaltic pump a, peristaltic pump b, peristaltic pump c, peristaltic pump d, described
Connecting pipe between condenser and elution liquid container is equipped with peristaltic pump a, between the sample collection bottle and colorimetric device
Connecting pipe also installs peristaltic pump b, and the connecting pipe between the marker container and colorimetric device is equipped with peristaltic pump c, institute
It states the connecting pipe between alkali liquor container and colorimetric device and peristaltic pump d is installed.
SO in flue gas above-mentioned3Self-operated measuring unit, the sampling gun are heat tracing sampling gun, and the filter is ceramic mistake
Filter, the colorimetric device are cuvette, and the blender is magnetic stirring apparatus.
SO in a kind of flue gas3Method for automatic measurement, using SO in flue gas above-mentioned3Self-operated measuring unit, including following mistake
Journey:
After device starting, sampling gun and thermostatic water-circulator bath pot are begun to warm up, after design temperature to be achieved, starting pumping
Pump；
Sampling gun carries out heat temperature raising to the flue gas of extraction, and flue gas is after filter removes dust, into condenser, cold
Under the action of condenser and sintered glass filter, SO in flue gas3It is captured；
Peristaltic pump a on starting elution liquid container and condenser connecting pipe extracts leacheate in 100ml elution liquid container
Enter sample collection bottle after being rinsed to condenser and sintered glass filter, be captured SO3The flue gas discharged afterwards is through non-return valve
Return to former flue；
The instruction that 10ml leacheate enters colorimetric device, and is added in 0.25ml marker container is extracted from sample collection bottle
Agent starts blender；
It is then titrated with the lye that the rate of 5ml/min is added in alkali liquor container, (is than color light source according to absorbance
530nm light source, different colours liquid absorbance is different, and control system feedback signal is different, and then judges titration end-point) determine drop
Determine terminal；
According to fume extraction amount and alkali lye consumption amount, control system calculates SO in flue gas automatically3Concentration；
Every time after measurement, starting compressed air system backwashes sampling gun and filter.
Further, SO in flue gas above-mentioned3Method for automatic measurement, according to fume extraction amount and alkali lye consumption amount, control
System calculates SO in flue gas automatically3Concentration；Specific calculation formula are as follows:
Wherein:For sulfur trioxide concentration, mg/m in flue gas3；CNaOHFor Concentration of Sodium Hydroxide Solution Standard, mol/L；
VNaOHStandard solution of sodium hydroxide volume, mL are consumed for titration；Vgas is to extract flue gas volume, m3。
SO in flue gas above-mentioned3Method for automatic measurement, the design temperature of sampling gun are 260 DEG C；Thermostatic water-circulator bath pot
Design temperature is 65 DEG C~80 DEG C.
SO in flue gas above-mentioned3Method for automatic measurement, the lye in alkali liquor container is standard solution of sodium hydroxide, and concentration is
0.1mol/L；Indicator A in marker container is bromophenol blue indicator；Eluting the leacheate A in liquid container is with bromophenol blue
5% neutral aqueous isopropanol is adjusted to for indicator.
SO in flue gas above-mentioned3Method for automatic measurement, the lye in alkali liquor container is standard solution of sodium hydroxide, and concentration is
0.5mol/L；Indicator B in marker container is the mixed indicator of bromocresol green and methyl red, wherein bromocresol green and first
The red mass ratio of base is 1:1；Leacheate B in elution liquid container is to be adjusted to neutrality using bromocresol green and methyl red as indicator
5% aqueous isopropanol, wherein bromocresol green and methyl red mass ratio are also 1:1.According to SO in flue gas3The difference of concentration, it is optional
Selecting the lye, two kinds of indicator and two kinds of leacheates of various concentration is all applicable, configuration method establishing criteria DL/T 998-
2016 " wet desulfurization of flue gas by limestone-gypsum method device performance acceptance test specifications ".
Compared with prior art, the utility model has the beneficial effect that
(1) back purge system of sampling gun and filter, i.e. compressed air system are increased, SO is improved3Measurement essence
Degree；
(2) using SO in control condensation method trapping flue gas3, improve the reliability of measurement；
(3) SO is calculated by test acid ion content3Concentration；
(4) acid ion concentration is measured using acid-base titration.
Comprehensive, the utility model is based on SO in control condensation method trapping flue gas3, acid ion survey is carried out based on acid base titration
Amount calculates SO in flue gas in conjunction with flue gas sampling volume3Concentration can reduce exhaust gas dust to SO3Measurement influences, improves measurement essence
Degree and reliability, high degree of automation, easy to operate, the SO suitable for flue gas3Automatic measurement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is control logic flow chart of the utility model in practical application.
The meaning of appended drawing reference: 1- flue gas, 2- sampling gun, 3- filter, 4- compressed air system, 5- valve, 6- condensation
Device, 7- sintered glass filter, 8- thermostatic water-circulator bath pot, 9- elute liquid container, 10a- peristaltic pump a, 10b- peristaltic pump b, 10c-
Peristaltic pump c, 10d- peristaltic pump d, 11- sample collection bottle, 12- colorimetric device, 13- blender, 14- marker container, 15- lye
Container, 16- is than color light source, 17- controller, 18- non-return valve, 19- flowmeter, 20- aspiration pump.
The utility model is further described with reference to the accompanying drawings and detailed description.
Specific embodiment
Embodiment 1 of the present utility model:as shown in FIG. 1 and FIG. 2, SO in a kind of flue gas3Self-operated measuring unit, feature exist
In including sampling system, collection system, analysis system and control system, flue gas 1 enter in sampling system, and sampling therein is
System, collection system, analysis system are sequentially connected through pipeline, and the equal signal of the sampling system, collection system, analysis system is connected to
Control system；Wherein sampling system includes sampling gun 2, filter 3 and compressed air system 4, one end installation of the sampling gun 2
There is filter 3, is also connected with compressed air system 4 through pipeline above the end of the sampling gun 2；Sampling system further includes through pipe
The sequentially connected non-return valve 18 in road, flowmeter 19, aspiration pump 20, the non-return valve 18 connect far from one end of flowmeter 19 through pipeline
It is connected to sample collection bottle 11；Collection system includes condenser 6, sintered glass filter 7, thermostatic water-circulator bath pot 8, elution liquid container
9 and sample collection bottle 11, the elution liquid container 9, condenser 6, sintered glass filter 7, sample collection bottle 11 through pipeline sequentially
Connection, and sintered glass filter 7 is built in the bottom of condenser 6, one end of the thermostatic water-circulator bath pot 8 is connected to through pipeline
Above the side of condenser 6, the other end of the thermostatic water-circulator bath pot 8 is connected to below the side of condenser 6 through pipeline, institute
The top for stating condenser 6 is also connected to the end of sampling gun 2 through pipeline；Analysis system includes colorimetric device 12, blender 13, refers to
Show agent container 14 and alkali liquor container 15, the sample collection bottle 11, marker container 14, alkali liquor container 15 respectively by the road with than
Color device 12 connects, and is additionally provided with blender 13 below the colorimetric device 12.
Sampling system is made of sampling gun 2, filter 3, compressed air system 4 etc., and flue gas 1 heats in sampling gun 2 to be risen
Temperature removes chalk dust removing through filter 3；After sampling, starting compressed air system 4 recoils to sampling gun 2 and filter 3
It washes；Aspiration pump 20 in sampling system is for extracting flue gas；Flowmeter 19 extracts exhaust gas volumn for calculating；It needs to return in view of exhaust gas
Flue is sampled, being also provided with non-return valve 18 prevents flue gas from playing a reversed role.Collection system is by condenser 6, sintered glass filter 7, super perseverance
Warm water bath 8, elution liquid container 9, sample collection bottle 11 etc. form, SO in flue gas 13It is caught by condenser 6 and sintered glass filter 7
Collection enters sample collection bottle 11 after the leacheate washing through flowing out in elution liquid container 9；Wherein, thermostatic water-circulator bath pot 8 and cold
Condenser 6 is connected, and condenser 6 is made of glass tube and internal helix tube, glass tube and helix tube exterior space water-filling,
It is provided by thermostatic water-circulator bath pot 8, so that condenser 6 keeps 65 DEG C -80 DEG C of constant temperature, if temperature is too low, moisture can be condensed,
Influence measurement result；If temperature is excessively high, sulfur trioxide cannot be trapped all, influence measurement accuracy.Analysis system is filled by colorimetric
Set 12, blender 13, marker container 14, alkali liquor container 15 etc. composition, from sample collection bottle 11 extract a certain amount of leacheate into
The indicator for entering colorimetric device 12 and being added in marker container 14 starts blender 13, and lye then is added with given pace
Lye in container 15 is until solution colour is in order setting.Control system logic built module, control sampling system,
Collection system, analysis system according to each measuring process sequence and acquire action signal and are calculated respectively.Control system is market
Upper conventional use of system, such as PLC controller etc..
Embodiment 2: as depicted in figs. 1 and 2, SO in a kind of flue gas3Self-operated measuring unit, which is characterized in that including sampling
System, collection system, analysis system and control system, flue gas 1 enter in sampling system, sampling system therein, collection system,
Analysis system is sequentially connected through pipeline, and the equal signal of the sampling system, collection system, analysis system is connected to control system；Its
Middle sampling system includes sampling gun 2, filter 3 and compressed air system 4, and one end of the sampling gun 2 is equipped with filter 3,
Compressed air system 4 also is connected with through pipeline above the end of the sampling gun 2；Sampling system further includes being sequentially connected with through pipeline
Non-return valve 18, flowmeter 19, aspiration pump 20, the described one end of non-return valve 18 far from flowmeter 19 through pipeline be connected to sample receive
Collect bottle 11；Collection system includes that condenser 6, sintered glass filter 7, thermostatic water-circulator bath pot 8, elution liquid container 9 and sample are received
Collect bottle 11, the elution liquid container 9, condenser 6, sintered glass filter 7, sample collection bottle 11 are sequentially connected with through pipeline, and are burnt
Knot glass filter 7 is built in the bottom of condenser 6, and one end of the thermostatic water-circulator bath pot 8 is connected to condenser 6 through pipeline
Above side, the other end of the thermostatic water-circulator bath pot 8 is connected to below the side of condenser 6 through pipeline, the condenser 6
Top the end of sampling gun 2 is also connected to through pipeline；Analysis system includes colorimetric device 12, blender 13, marker container
14 and alkali liquor container 15, the sample collection bottle 11, marker container 14, alkali liquor container 15 respectively by the road with colorimetric device 12
It connects, is additionally provided with blender 13 below the colorimetric device 12.Sampling system is by sampling gun 2, filter 3, compressed air system 4
Deng composition, the heat temperature raising in sampling gun 2 of flue gas 1 removes chalk dust removing through filter 3；After sampling, start compressed air system
4 pairs of sampling guns 2 and filter 3 backwash；Aspiration pump 20 in sampling system is for extracting flue gas；Flowmeter 19 is based on
It calculates and extracts exhaust gas volumn；Sampling flue need to be returned in view of exhaust gas, being also provided with non-return valve 18 prevents flue gas from playing a reversed role.Collection system is by cold
Condenser 6, sintered glass filter 7, thermostatic water-circulator bath pot 8, elution liquid container 9, sample collection bottle 11 etc. form, SO in flue gas 13
It is trapped by condenser 6 and sintered glass filter 7, enters sample collection bottle after the leacheate washing through flowing out in elution liquid container 9
11；Wherein, thermostatic water-circulator bath pot 8 is connected with condenser 6, and condenser 6 is made of glass tube and internal helix tube, glass tube
Internal and helix tube exterior space water-filling, is provided by thermostatic water-circulator bath pot 8, so that condenser 6 keeps 65 DEG C -80 DEG C of perseverance
Temperature, if temperature is too low, moisture can be condensed, and influence measurement result；If temperature is excessively high, sulfur trioxide cannot be trapped all, shadow
Ring measurement accuracy.Analysis system is made of colorimetric device 12, blender 13, marker container 14, alkali liquor container 15 etc., from sample
Receiving flask 11 extracts the indicator that a certain amount of leacheate enters colorimetric device 12 and is added in marker container 14, starts blender
13, the lye in alkali liquor container 15 is then added until solution colour is in order setting with given pace.Control system
Logic built module, control sampling system, collection system, analysis system according to each measuring process sequence and acquire movement letter respectively
It number is calculated.Control system is conventional use of system, such as PLC controller etc. on the market.
SO in flue gas3Self-operated measuring unit further includes than color light source 16, and control system is built-in with controller 17, the colorimetric
Light source 16 is electrically connected at controller 17.Wherein than 16 wavelength 530nm of color light source, the absorbance of different colours is different, and feedback arrives
The signal of controller 17 is different, judges titration end-point whereby；Controller 17 is a part of control system, simultaneously for signal feedback
Control titration end-point.SO in flue gas3Self-operated measuring unit further includes valve 5, close to one end of filter 3 on the sampling gun 2
Valve 5 is installed；Valve 5 is also installed in connecting pipe between the sampling gun 2 and condenser 6；The condenser 6 and leaching
Connecting pipe between wash liquor vessel 9 is also equipped with valve 5.SO in flue gas3Self-operated measuring unit further includes peristaltic pump a10a, compacted
Dynamic pump b10b, peristaltic pump c10c, peristaltic pump d10d, the connecting pipe between the condenser 6 and elution liquid container 9 are equipped with compacted
Dynamic pump a10a, the connecting pipe between the sample collection bottle 11 and colorimetric device 12 are equipped with peristaltic pump b10b, the instruction
Connecting pipe between agent container 14 and colorimetric device 12 is equipped with peristaltic pump c10c, the alkali liquor container 15 and colorimetric device 12
Between connecting pipe peristaltic pump d10d is installed.Specifically, the sampling gun 2 is heat tracing sampling gun, the filter 3 is pottery
Porcelain filter, the colorimetric device 12 are cuvette, and the blender 13 is magnetic stirring apparatus.
Embodiment 3: as depicted in figs. 1 and 2, SO in a kind of flue gas3Method for automatic measurement, using SO in flue gas above-mentioned3From
Dynamic measuring device, including following procedure:
After device starting, sampling gun 2 and thermostatic water-circulator bath pot 8 are begun to warm up, after design temperature to be achieved, starting pumping
Pump 20；
The flue gases 1 of 2 pairs of sampling gun extractions carry out heat temperature raisings, and flue gas is after filter 3 removes chalk dust removing, into condenser 6,
Under the action of condenser 6 and sintered glass filter 7, SO in flue gas3It is captured；
Peristaltic pump a10a on starting elution liquid container 9 and 6 connecting pipe of condenser is extracted in 100ml elution liquid container 9
Leacheate enters sample collection bottle 11 after being rinsed to condenser 6 and sintered glass filter 7, and be captured SO3The cigarette discharged afterwards
Gas returns to former flue through non-return valve 18；
10ml leacheate is extracted from sample collection bottle 11 and enters colorimetric device 12, and is added in 0.25ml marker container 14
Indicator, start blender 13；
It is then titrated with the lye that the rate of 5ml/min is added in alkali liquor container 15, color light source (is compared according to absorbance
16 be 530nm light source, and different colours liquid absorbance is different, and control system feedback signal is different, and then judges titration end-point) really
Determine titration end-point；
According to fume extraction amount and alkali lye consumption amount, control system calculates SO in flue gas automatically3Concentration；Measurement terminates every time
Afterwards, starting compressed air system 4 backwashes sampling gun 2 and filter 3.
Further, according to fume extraction amount and alkali lye consumption amount, control system calculates SO in flue gas automatically3Concentration；Tool
The calculation formula of body are as follows:
Wherein:For sulfur trioxide concentration, mg/m in flue gas3；CNaOHFor Concentration of Sodium Hydroxide Solution Standard, mol/L；
VNaOHStandard solution of sodium hydroxide volume, mL are consumed for titration；Vgas is to extract flue gas volume, m3。
Specifically, the design temperature of sampling gun 2 is 260 DEG C；The design temperature of thermostatic water-circulator bath pot 8 is 65 DEG C~80
℃。
Further, the lye in alkali liquor container 15 is standard solution of sodium hydroxide, concentration 0.1mol/L；Indicator holds
Indicator A in device 14 is bromophenol blue indicator；Leacheate A in elution liquid container 9 is in being adjusted to by indicator of bromophenol blue
5% aqueous isopropanol of property.Further, the lye in alkali liquor container 15 is standard solution of sodium hydroxide, concentration 0.5mol/
L；Indicator B in marker container 14 is the mixed indicator of bromocresol green and methyl red, wherein bromocresol green and methyl red
Mass ratio is 1:1；Leacheate B in elution liquid container 9 is different to be adjusted to neutral 5% using bromocresol green and methyl red as indicator
Propanol solution, wherein bromocresol green and methyl red mass ratio are also 1:1.According to SO in flue gas3Difference may be selected in the difference of concentration
The lye of concentration, two kinds of indicator and two kinds of leacheates are all applicable, configuration method establishing criteria DL/T 998-2016 " stone
Lime stone-gypsum wet flue gas desulfurizing device performance acceptance test specification ".
Working principle of the utility model is: after the device in the utility model starts, sampling gun 2 and thermostatic water-circulator bath pot
8 begin to warm up, and after design temperature to be achieved, start aspiration pump 20；Flue gas is after filter 3 removes chalk dust removing, into condenser 6,
SO3It is trapped in condenser 6 and sintered glass filter 7；Peristaltic pump on starting elution liquid container 9 and 6 connecting pipe of condenser
A10a is extracted after 100ml leacheate is rinsed condenser 6 and sintered glass filter 7 and is entered sample collection bottle 11, exhaust gas
(trapping SO3The flue gas of equipment exhausting afterwards) through non-return valve 18 return to former flue；10ml leacheate is extracted from sample collection bottle 11, is added
Enter the indicator in 0.25ml marker container 14, start blender 13, extracts the lye in alkali liquor container 15 and with 5ml/min
Rate titrated；It (is 530nm light source than color light source 16, different colours liquid absorbance is different, control system according to absorbance
Feedback signal of uniting is different, and then judges titration end-point) determine titration end-point, acid ion concentration in solution is calculated, in conjunction with pumping
Volume calculates SO in flue gas3Concentration.Formula:WhereinIt is dense for sulfur trioxide in flue gas
Degree, mg/m3；CNaOHFor Concentration of Sodium Hydroxide Solution Standard, mol/L；VNaOHStandard solution of sodium hydroxide volume is consumed for titration,
mL；Vgas is to extract flue gas volume, m3。
Claims (5)
1. SO in a kind of flue gas3Self-operated measuring unit, which is characterized in that including sampling system, collection system, analysis system and control
System processed, flue gas (1) enter in sampling system, and sampling system therein, collection system, analysis system are sequentially connected through pipeline,
The equal signal of the sampling system, collection system, analysis system is connected to control system；
Wherein sampling system includes sampling gun (2), filter (3) and compressed air system (4), one end of the sampling gun (2)
It is equipped with filter (3), is also connected with compressed air system (4) through pipeline above the end of the sampling gun (2)；
Sampling system further includes through the sequentially connected non-return valve of pipeline (18), flowmeter (19), aspiration pump (20), the non-return valve
(18) one end far from flowmeter (19) is connected to sample collection bottle (11) through pipeline；
Collection system includes condenser (6), sintered glass filter (7), thermostatic water-circulator bath pot (8), elution liquid container (9) and sample
Product receiving flask (11), the elution liquid container (9), condenser (6), sintered glass filter (7), sample collection bottle (11) are through pipeline
It is sequentially connected with, and sintered glass filter (7) is built in the bottom of condenser (6), one end warp of the thermostatic water-circulator bath pot (8)
Pipeline is connected to above the side of condenser (6), and the other end of the thermostatic water-circulator bath pot (8) is connected to condenser through pipeline
(6) below side, the top of the condenser (6) is also connected to the end of sampling gun (2) through pipeline；
Analysis system includes colorimetric device (12), blender (13), marker container (14) and alkali liquor container (15), the sample
Receiving flask (11), marker container (14), alkali liquor container (15) are connect with colorimetric device (12) by the road respectively, the colorimetric dress
It sets and is additionally provided with blender (13) below (12).
2. SO in flue gas according to claim 13Self-operated measuring unit, which is characterized in that further include than color light source (16),
Control system is built-in with controller (17), described to be electrically connected at controller (17) than color light source (16).
3. SO in flue gas according to claim 13Self-operated measuring unit, which is characterized in that it further include valve (5), it is described to adopt
One end on sample rifle (2) close to filter (3) is equipped with valve (5)；Connection between the sampling gun (2) and condenser (6)
Valve (5) are also installed on pipeline；Connecting pipe between the condenser (6) and elution liquid container (9) is also equipped with valve
(5)。
4. SO in flue gas according to claim 13Self-operated measuring unit, which is characterized in that further include peristaltic pump a (10a),
Peristaltic pump b (10b), peristaltic pump c (10c), peristaltic pump d (10d), the connection between the condenser (6) and elution liquid container (9)
Pipe installing has peristaltic pump a (10a), and the connecting pipe between the sample collection bottle (11) and colorimetric device (12) is equipped with compacted
Dynamic pump b (10b), the connecting pipe between the marker container (14) and colorimetric device (12) are equipped with peristaltic pump c (10c),
Connecting pipe between the alkali liquor container (15) and colorimetric device (12) is equipped with peristaltic pump d (10d).
5. SO in flue gas according to claim 13Self-operated measuring unit, which is characterized in that the sampling gun (2) is heat tracing
Sampling gun, the filter (3) are ceramic filter, and the colorimetric device (12) is cuvette, and the blender (13) is magnetic
Power blender.
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| CN109632408A (en) * | 2019-02-21 | 2019-04-16 | 中国华电科工集团有限公司 | SO in a kind of flue gas3Self-operated measuring unit and method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632408A (en) * | 2019-02-21 | 2019-04-16 | 中国华电科工集团有限公司 | SO in a kind of flue gas3Self-operated measuring unit and method |
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