CN107515280A - The continuous on-line detection method and device of sulfur trioxide in a kind of flue gas - Google Patents
The continuous on-line detection method and device of sulfur trioxide in a kind of flue gas Download PDFInfo
- Publication number
- CN107515280A CN107515280A CN201710867597.3A CN201710867597A CN107515280A CN 107515280 A CN107515280 A CN 107515280A CN 201710867597 A CN201710867597 A CN 201710867597A CN 107515280 A CN107515280 A CN 107515280A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- reaction
- fluidized
- bed reactor
- sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention belongs to atmosphere pollution field of measuring technique, a kind of continuous on-line detection method and device of sulfur trioxide in flue gas is disclosed, this method comprises the following steps：Sampling flue gas in flue is divided into two-way, first via sampling flue gas, which is passed directly into the first flue gas analyzer, measures former smoke components, second tunnel sampling flue gas is passed through in fluidized-bed reactor, and irreversible reaction occurs for the solid salt particles with being positioned in fluidized-bed reactor, flue gas is passed through in the second flue gas analyzer smoke components after measurement reaction after reaction；Pass through SO in the difference of smoke components after more former smoke components and reaction, and the second tunnel sampling flue gas3With the equivalent proportion of solid salt particles reaction, SO in flue gas is calculated in flue in real time3Concentration.The present invention is simple in construction, and measurement accuracy is high, it is possible to achieve SO in flue gas3Continuous on-line detection.
Description
Technical field
The invention belongs to atmosphere pollution field of measuring technique, and in particular to sulfur trioxide is continuous online in a kind of flue gas
Detection method and device.
Background technology
SO3It is one of main reason of acid rain, because it is easily formed submicron aerosol, and then forms two sulfoxylates
Particle, therefore be also PM in air2.5One of important sources.In addition, SO3Boiler flue corrosion can be caused, with NH3、H2O combines generation
The NH of caking property4HSO4The problems such as also resulting in SCR inactivations, air preheater blocking.Especially in the political affairs of China's coal-fired flue-gas minimum discharge
Under plan requirement, to improve NOXRemoval efficiency, residence time of the flue gas in SCR is elongated, further increases SO in SCR2To
SO3Conversion ratio.Therefore SO in flue gas3Accurate measurement technology be increasingly taken seriously.
Due to SO3Chemical property is active, and easily with other substance reactions, it is combined generation H with vapor2SO4Also easily in pipe
Condensed in road, and SO in coal-fired flue-gas3Concentration be far below SO2, therefore efficiently sampling and avoid SO2Interference, be SO3It is accurate
The key really measured.At present, both at home and abroad on SO3Detection main standard it is as shown in table 1 below, its predominantly detect method include control
Two kinds of condensation method and isopropanol absorption process processed.Control condensation method refers to by controlling condenser pipe temperature in vapor and the dew of sulfuric acid
Between point temperature, ensure the SO in flue gas3Condensation and vapor does not condense, prevent SO2Condense in water, so as to reach separation SO3
And SO2Purpose.Isopropanol absorption process is to SO using 80% aqueous isopropanol under condition of ice bath3Solubility it is high and to SO2Dissolving
Spend extremely low and can prevent SO2The characteristic of oxidation, separate SO3And SO2.SO after collection3, then by detecting low concentration in solution
SO4 2-Method be converted to SO in flue gas3Content, mainly have gravimetric method, Barium Chromate Spectrophotometer, the chromatography of ions, nephelometry,
Volumetric precipitation method etc..
Table 1 often uses SO3Examination criteria
What above-mentioned examination criteria used is all first to sample the method measured afterwards, can not be realized to SO3Continuous on-line monitoring,
And volume is big, flow is complicated, and human error is larger, it is difficult to realizes the instrumentation of measurement.
Application No. US8021617 U.S. patent Nos application discloses Flue gas monitoring and
Dynamic spiking for sulfur trioxide/sulfuric acid, it uses two sets of parallel condensing devices and survey
Device is measured, alternates sampling and measurement, measurement accuracy is higher, but volume is larger, inconvenient to carry.
The Chinese invention patent application of Application No. 201310376879.5 disclose sulfur trioxide in a kind of flue gas
Line detector and method, it uses some condensing units in parallel, alternates sampling, then by absorbing liquid by condensation
SO3The SO measured by liquid phase detection unit in solution is washed out in turn4 2-SO in concentration conversion flue gas3Concentration, realize measurement
Minimize instrumentation.But because the sampling time of a condensing unit is typically in more than 3min, this application and US8021617 phases
Seemingly, still fall within semi-on-line continuously to measure, measurement period is not less than 3min.
Application No. US8368896 U.S. patent Nos disclose Measurement of sulfur trioxide
Via spectroscopy, utilize SO3Difference with other gas componants to light absorption wavelength, the laser for measuring smoke components are inhaled
Spectrum is received, SO is determined by the quantitative analysis of spectrum3Concentration value, it is possible to achieve SO3Continuous on-line measurement, but due to SO2
With SO3Absorption spectrum exist it is certain overlapping, it is difficult to avoid high concentration SO2To SO3The interference of measurement, and vapor and fly
Ash also has a significant effect to laser absorption, therefore the technology requires higher to actual measuring environment and the Quantitative Separation of spectrum, tool
There is certain technical limitation.
The content of the invention
It is an object of the invention to provide a kind of continuous on-line detection method and device of sulfur trioxide in flue gas, its structure
Simply, measurement accuracy is high, it is possible to achieve SO in flue gas3Continuous on-line detection.
The technical solution adopted for the present invention to solve the technical problems is：
The continuous on-line detection method of sulfur trioxide, comprises the following steps in a kind of flue gas：
S1, the sampling flue gas in flue is divided into two-way, first via sampling flue gas is passed directly into the first flue gas analyzer
Measure former smoke components；
S2, the second tunnel sampling flue gas are passed through in fluidized-bed reactor, and the solid salt with being positioned in fluidized-bed reactor
Irreversible reaction occurs for particle, and the reaction is carried out by fixed mol ratio, the solid salt particles and SO in flue gas3Reaction generation
Chemical property is stable, is not easy to condense, be easy to the gas of detection, and flue gas is passed through in the second flue gas analyzer after measurement reaction after reaction
Smoke components；
S3, pass through flue gas after the reaction that measures to obtain in the former smoke components and step S2 that measure to obtain in comparison step S1
SO in the difference of composition, and the second tunnel sampling flue gas3With the equivalent proportion of solid salt particles reaction, flue gas in flue is calculated in real time
Middle SO3Concentration, realize on-line continuous detect.
By above-mentioned technical proposal, in addition to step S4：First via sampling flue gas is controlled by first flowmeter in step S1
The instantaneous delivery of the first flue gas analyzer is passed through, flue gas is passed through the second flue gas by second flowmeter control after being reacted in step S2
The instantaneous delivery of analyzer, pass through the SO being calculated in the two instantaneous deliveries and step S33Concentration, calculate solid salt
The consumption of particle.
By above-mentioned technical proposal, in step S2, first fluidized-bed reactor is heated and keeps constant temperature, at such a temperature second
SO in road sampling flue gas3Quick irreversible reaction all occurs with solid salt particles.
By above-mentioned technical proposal, the solid salt particles are NaCl, NaCl and the SO in flue gas3React 1 or reaction
2,
SO3(g)+H2O (g)+2NaCl=Na2SO4+ 2HCl (g) reactions 1
SO3(g)+H2O (g)+NaCl=NaHSO4+ HCl (g) reactions 2；
When fluidized-bed reactor is heated to 400-460 DEG C and keeps constant temperature, the NaCl and SO in flue gas3React 1,
Mol ratio is fixed as 2:1, and the equilibrium constant of reaction 1 is more than 105, so that SO3Reaction is complete.
By above-mentioned technical proposal, the solid salt particles are FeS, FeS and the SO in flue gas3React 3,
FeS+SO3(g)+H2O (g)=FeSO4+H2S (g) reactions 3；
When fluidized-bed reactor is heated to 200-460 DEG C and keeps constant temperature, SO31 is fixed as with FeS mol ratio:1,
And the equilibrium constant of reaction 3 is more than 105, so that SO3Reaction is complete.
Accordingly, the present invention also provides the continuous on-line detection device of sulfur trioxide in flue gas a kind of, including sampling pipe, the
One passage and second channel, the import of the sampling pipe are connected with flue, the outlet of the sampling pipe respectively with first passage and
Second channel connects, and is provided with the first flue gas analyzer on the first passage, is set successively from front to back on the second channel
Fluidized-bed reactor and the second flue gas analyzer are equipped with, being placed with the fluidized-bed reactor can be with SO3Reaction generation chemistry
Property is stable, is not easy to condense, be easy to the solid salt particles of the gas of detection.
By above-mentioned technical proposal, the both sides in the fluidized-bed reactor positioned at solid salt particles are respectively arranged with sieve plate.
By above-mentioned technical proposal, the fluidized-bed reactor is arranged vertically.
By above-mentioned technical proposal, heating furnace is provided with outside the fluidized-bed reactor, thermoelectricity is configured with the heating furnace
It is even.
By above-mentioned technical proposal, first flowmeter, the first sampling pump and the first valve are additionally provided with the first passage,
Rear end on the second channel positioned at fluidized-bed reactor is additionally provided with second flowmeter, the second sampling pump and the second valve.
The present invention, have the advantages that：By the present invention in that sampling flue gas enters fluidized-bed reactor all the way, and make
Solid salt particles disposed within and the SO in flue gas3The chemical property stabilization of reaction generation, it is not easy to condense, be easy to the gas of detection
Body, SO in flue gas is characterized by generating the concentration of gas3Concentration, SO can be achieved3High-acruracy survey；It is additionally, since SO3With consolidating
The reaction of body salt particle is carried out continuously, and is generated gas and be easy to on-line measurement, therefore is characterized by generating gas concentration in flue gas
SO3Concentration, SO can be achieved3Continuous on-line measurement；In addition, measuring method of the present invention is simple, tediously long SO is avoided3Collect link,
It is easily achieved miniaturization and the instrumentation of measurement apparatus.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure：1- sampling pipes, 2- first passages, 3- second channels, the sieve plates of 4- first, 5- solid salt particles, 6- fluid beds
Reactor, 7- thermocouples, 8- heating furnaces, the sieve plates of 9- second, 10- charging/discharging valves, 11- feed inlet and outlets, the flue gas analyses of 12- first
Instrument, 13- first flowmeters, the sampling pumps of 14- first, the valves of 15- first, the flue gas analyzers of 16- second, 17- second flowmeters,
The sampling pumps of 18- second, the valves of 19- second.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
In the preferred embodiment, as shown in figure 1, in a kind of flue gas sulfur trioxide continuous on-line detection side
Method, comprise the following steps：
S1, the sampling flue gas in flue is divided into two-way, first via sampling flue gas is passed directly into the first flue gas analyzer 12
The middle former smoke components of measurement；
S2, the second tunnel sampling flue gas are passed through in fluidized-bed reactor 6, and the solid with being positioned in fluidized-bed reactor 6
Irreversible reaction occurs for salt particle 5, and the reaction is carried out by fixed mol ratio, solid salt particles 5 and SO in flue gas3Reaction generation
Chemical property is stable, is not easy to condense, be easy to the gas of detection, and flue gas, which is passed through in the second flue gas analyzer 16, after reaction measures reaction
Smoke components afterwards；
S3, pass through flue gas after the reaction that measures to obtain in the former smoke components and step S2 that measure to obtain in comparison step S1
SO in the difference of composition, and the second tunnel sampling flue gas3With the equivalent proportion of solid salt particles reaction, flue gas in flue is calculated in real time
Middle SO3Concentration, realize on-line continuous detect.
In a preferred embodiment of the invention, as shown in figure 1, this method also includes step S4：The first via is adopted in step S1
Sample flue gas controls the instantaneous delivery for being passed through the first flue gas analyzer 12 by first flowmeter 13, and flue gas leads to after being reacted in step S2
Cross second flowmeter 17 and control the instantaneous delivery for being passed through the second flue gas analyzer 16, pass through the two instantaneous deliveries and step S3
In the SO that is calculated3Concentration, calculate the consumptions of solid salt particles, in order to supplement fresh solid salt particle, realize length
Time Continuous detects.Fluidized-bed reactor is configured with charging/discharging valve 10 and feed inlet and outlet 11, can discharge the solid salt reacted
Grain, supplement fresh solid salt particle.
In a preferred embodiment of the invention, in step S2, first fluidized-bed reactor is heated and keeps constant temperature, in the temperature
SO in the lower second tunnel sampling flue gas of degree3Quick irreversible reaction all occurs with solid salt particles.
In a preferred embodiment of the invention, solid salt particles NaCl, NaCl and the SO in flue gas3React 1 or
Reaction 2,
SO3(g)+H2O (g)+2NaCl=Na2SO4+ 2HCl (g) reactions 1
SO3(g)+H2O (g)+NaCl=NaHSO4+ HCl (g) reactions 2；
When fluidized-bed reactor is heated to 400-460 DEG C and keeps constant temperature, the NaCl and SO in flue gas3React 1,
And react 2 and do not occur, mol ratio is fixed as 2:1, and the equilibrium constant of reaction 1 is more than 105, belong to typical irreversible reaction,
So that SO3Reaction is complete.
In a preferred embodiment of the invention, solid salt particles FeS, FeS and the SO in flue gas3React 3,
FeS+SO3(g)+H2O (g)=FeSO4+H2S (g) reactions 3；
When fluidized-bed reactor is heated to 200-460 DEG C and keeps constant temperature, SO31 is fixed as with FeS mol ratio:1,
And the equilibrium constant of reaction 3 is more than 105, belong to typical irreversible reaction, so that SO3Reaction is complete.
React the HCl or H of generation2The equal property of S gases is stable, is not easy to condense.
Accordingly, the present invention also provides a kind of continuous on-line detection device of sulfur trioxide in flue gas, as shown in figure 1, bag
Sampling pipe 1, first passage 2 and second channel 3 are included, the import of sampling pipe 1 is connected with flue, for gathering flue gas to be detected,
The outlet of sampling pipe 1 is connected with first passage 2 and second channel 3 respectively, and the first flue gas analyzer is provided with first passage 2
12, the flue gas analyzer 16 of fluidized-bed reactor 6 and second, fluidized-bed reactor 6 are disposed with from front to back on second channel 3
Inside being placed with can be with SO3Reaction generation chemical property is stable, is not easy to condense, be easy to the solid salt particles 5 of the gas of detection.
In a preferred embodiment of the invention, as shown in figure 1, being located at the both sides of solid salt particles 5 in fluidized-bed reactor 6
It is respectively arranged with sieve plate.Sieve plate positioned at solid salt particles front end is referred to as the first sieve plate 4, mainly plays cloth wind, is ensured
Flue gas reacts even into participation in fluidized-bed reactor；Sieve plate positioned at solid salt particles rear end is referred to as the second sieve plate 9,
Mainly play gas solid separation, prevent solid particle from entering in flue gas analyzer.Quartzy sieve plate can be selected in sieve plate.
In a preferred embodiment of the invention, as shown in figure 1, fluidized-bed reactor 6 is arranged vertically, solid salt particles are ensured
It is covered with the first sieve plate, so as to be contacted between flue gas and solid salt particles fully.
In a preferred embodiment of the invention, as shown in figure 1, being provided with heating furnace 8, heating furnace 8 outside fluidized-bed reactor 6
Inside it is configured with thermocouple 7.Heating furnace is used for heated fluidized bed reactor, not low by controlling reaction temperature, temperature control precision
In 1 DEG C, make solid salt particles and SO3The quick irreversible reaction of generation, and react and carried out by fixed mol ratio.
In a preferred embodiment of the invention, as shown in figure 1, being additionally provided with first flowmeter 13, first on first passage 2
The valve 15 of sampling pump 14 and first, on second channel 3 positioned at the rear end of fluidized-bed reactor 6 be additionally provided with second flowmeter 17,
Second sampling pump 18 and the second valve 19.The instantaneous delivery of two-way flue gas is controlled respectively by two flowmeters to meet two cigarettes
The measurement request of qi leel analyzer, first flowmeter are used to control the gas instantaneous delivery in the first flue gas analyzer, second flow
Count for controlling the gas instantaneous delivery in the second flue gas analyzer.First sampling pump is used to provide gas in the first flue gas analyzer
Pressure needed for body sampling collection, the second sampling pump are used to provide in the second flue gas analyzer pressure needed for gas sampling collection.The
One valve is used to control the gas in first passage to flow, the gas flowing that the second valve is used in second channel.
If solid salt particles are NaCl, then the first flue gas analyzer and the second flue gas analyzer should possess continuous on-line detection
The ability of HCl concentration, measure HCl concentration and be designated as n respectivelyHCl1、nHCl2.Calculated according to the stoichiometric ratio of reaction 1, SO3Concentration
nSO3=(nHCl2-nHCl1)/2。
If solid salt particles are FeS, then the first flue gas analyzer should possess continuous on-line detection HCl ability, measure HCl
Concentration is designated as nHCl3, the second flue gas analyzer should possess continuous on-line detection HCl and H2S ability, measures HCl and H2S concentration point
N is not designated as itHCl4And nH2S.Because FeS can also react 4 with HCl,
FeS+2HCl (g)=FeCl2+H2S (g) reactions 4,
Calculated according to the stoichiometric ratio of reaction 3 and reaction 4, SO3Concentration nSO3=nH2S-(nHCl3-nHCl4)/2。
Being exemplified below two embodiments, the present invention will be further described.
Embodiment 1
Solid salt particles are NaCl, and the present invention comprises the following steps：
S1, the NaCl particles by 20g or so, are placed in fluidized-bed reactor, fluidized-bed reactor diameter 40mm, height
160mm, fluidized-bed reactor use quartz material, it is ensured that reactor does not react with the gas componant in flue gas in itself, fluid bed
Reactor configurations have two sieve plates；
S2, by heating furnace fluidized-bed reactor is heated to 400 DEG C；
S3, sampling pipe are connected with flue, gather flue gas to be detected, and sampling pipe is divided into two-way by flue gas is sampled, entered respectively
Enter first passage and second channel, the flue gas in first passage is passed directly into the first flue gas analyzer that to measure former flue gas HCl dense
Spend n1, measurement accuracy 0.1ppm, the flue gas in second channel is passed through in fluidized-bed reactor and is passed through the second flue gas again after reaction
HCl concentration n in flue gas after measurement is reacted in analyzer2, measurement accuracy 0.1ppm；
S4, first flowmeter are connected with the first flue gas analyzer, for controlling the gas in the first flue gas analyzer instantaneous
Flow V1, instantaneous delivery range 0-2L/min, control accuracy 0.01L/min, second flowmeter is connected with the second flue gas analyzer,
For controlling the gas instantaneous delivery V in the second flue gas analyzer2, instantaneous delivery range 0-2L/min, control accuracy 0.01L/
min；
S5, the first sampling pump are connected with first flowmeter, are mainly used in providing gas sampling in the first flue gas analyzer and adopt
Pressure head needed for collection, the second sampling pump are connected with second flowmeter, are mainly used in providing gas sampling in the second flue gas analyzer and adopt
Pressure head needed for collection；
S6, the SO according to the stoichiometric ratio real-time online calculating flue gas for reacting 13Concentration, measurement accuracy are reachable
0.05ppm, nSO3=(n2-n1)/2, NaCl consumption m is estimated according to the stoichiometric ratio of reaction 1NaCl,Unit mol；
S7、SO3Continuous on-line measurement stage, charging/discharging valve are always maintained at closed mode, estimate that NaCl consumption reaches
When 1/4, the first valve and the second valve are closed, opens charging/discharging valve, using sampling the pressure of flue gas by NaCl particles by entering
Discharging opening is discharged, then fresh NaCl particles are supplemented by feed inlet and outlet, after supplement is completed, opens the first valve and the second valve
Door, charging/discharging valve is closed, continue SO in on-line measurement flue gas3Concentration, it is simple to vary process, can complete, press within the 1min times
The average flue gas flow 1L/min of second flue gas analyzer, SO in flue gas3Mean concentration 50ppm is calculated, and 20g NaCl theories can connect
Continuous measurement is supplemented fresh NaCl particles after 3000 hours.
Embodiment 2
Solid salt particles are FeS, and the present invention comprises the following steps：
S1, the FeS particles by 40g or so, are placed in fluidized-bed reactor, fluidized-bed reactor diameter 40mm, height
160mm, fluidized-bed reactor use quartz material, and fluidized-bed reactor is configured with two sieve plates；
S2, by heating furnace fluidized-bed reactor is heated to 300 DEG C；
S3, sampling pipe are connected with flue, gather flue gas to be detected, and sampling pipe is divided into two-way by flue gas is sampled, entered respectively
Enter first passage and second channel, the flue gas in first passage is passed directly into the first flue gas analyzer that to measure former flue gas HCl dense
Spend n3, measurement accuracy 0.1ppm, the flue gas in second channel is passed through in fluidized-bed reactor and is passed through the second flue gas again after reaction
HCl concentration n in flue gas after measurement is reacted in analyzer4, H2S concentration n5, measurement accuracy 0.1ppm；
S4, first flowmeter are connected with the first flue gas analyzer, for controlling the gas in the first flue gas analyzer instantaneous
Flow V3, instantaneous delivery range 0-2L/min, control accuracy 0.01L/min, second flowmeter is connected with the second flue gas analyzer,
For controlling the gas instantaneous delivery V in the second flue gas analyzer4, instantaneous delivery range 0-2L/min, control accuracy 0.01L/
min；
S5, the first sampling pump are connected with first flowmeter, are mainly used in providing gas sampling in the first flue gas analyzer and adopt
Pressure head needed for collection, the second sampling pump are connected with second flowmeter, are mainly used in providing gas sampling in the second flue gas analyzer and adopt
Pressure head needed for collection；
S6, the SO according to the stoichiometric ratio real-time online of reaction 3 and reaction 4 calculating flue gas3Concentration, measurement accuracy are reachable
0.1ppm, nSO3=n5-(n3-n4)/2, FeS consumption m is estimated according to the stoichiometric ratio of reaction 3FeS,Unit mol；
S7、SO3Continuous on-line measurement stage, charging/discharging valve are always maintained at closed mode, estimate that FeS consumption reaches 1/
When 4, the first valve and the second valve are closed, charging/discharging valve is opened, FeS particles is passed through into input and output material using the pressure for sampling flue gas
Mouth discharge, then fresh FeS particles are supplemented by feed inlet and outlet, after supplement is completed, open the first valve and the second valve, pass
Charging/discharging valve is closed, continues SO in on-line measurement flue gas3Concentration, it is simple to vary process, can be completed within the 1min times, by the second cigarette
The average flue gas flow 1L/min of qi leel analyzer, SO in flue gas3Mean concentration 50ppm is calculated, and HCl mean concentrations 50ppm is calculated,
40g FeS theories are supplemented fresh FeS particles after can continuously measuring 1200 hours.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of continuous on-line detection method of sulfur trioxide in flue gas, it is characterised in that comprise the following steps：
S1, the sampling flue gas in flue is divided into two-way, first via sampling flue gas, which is passed directly into the first flue gas analyzer, to be measured
Former smoke components；
S2, the second tunnel sampling flue gas are passed through in fluidized-bed reactor, and the solid salt particles with being positioned in fluidized-bed reactor
Generation irreversible reaction, the reaction are carried out by fixed mol ratio, the solid salt particles and SO in flue gas3Reaction generation chemistry
Property is stable, is not easy to condense, be easy to the gas of detection, and flue gas is passed through in the second flue gas analyzer flue gas after measurement reaction after reaction
Composition；
S3, pass through smoke components after the reaction that measures to obtain in the former smoke components and step S2 that measure to obtain in comparison step S1
Difference, and the second tunnel sampling flue gas in SO3With the equivalent proportion of solid salt particles reaction, SO in flue gas is calculated in flue in real time3
Concentration, realize on-line continuous detect.
2. the continuous on-line detection method of sulfur trioxide in flue gas according to claim 1, it is characterised in that also include step
Rapid S4：First via sampling flue gas is passed through the instantaneous delivery of the first flue gas analyzer, step by first flowmeter control in step S1
Flue gas is passed through the instantaneous delivery of the second flue gas analyzer by second flowmeter control after being reacted in rapid S2, instantaneous by the two
The SO being calculated in flow and step S33Concentration, calculate the consumptions of solid salt particles.
3. the continuous on-line detection method of sulfur trioxide in flue gas according to claim 1, it is characterised in that step S2
In, first fluidized-bed reactor is heated and keeps constant temperature, at such a temperature SO in the second tunnel sampling flue gas3All with solid salt
Quick irreversible reaction occurs for grain.
4. the continuous on-line detection method of sulfur trioxide in flue gas according to claim 1, it is characterised in that the solid
Salt particle is NaCl, NaCl and the SO in flue gas3React 1 or reaction 2,
SO3(g)+H2O (g)+2NaCl=Na2SO4+ 2HCl (g) reactions 1
SO3(g)+H2O (g)+NaCl=NaHSO4+ HCl (g) reactions 2；
When fluidized-bed reactor is heated to 400-460 DEG C and keeps constant temperature, the NaCl and SO in flue gas3React 1, mole
Than being fixed as 2:1, and the equilibrium constant of reaction 1 is more than 105, so that SO3Reaction is complete.
5. the continuous on-line detection method of sulfur trioxide in flue gas according to claim 1, it is characterised in that the solid
Salt particle is FeS, FeS and the SO in flue gas3React 3,
FeS+SO3(g)+H2O (g)=FeSO4+H2S (g) reactions 3；
When fluidized-bed reactor is heated to 200-460 DEG C and keeps constant temperature, SO31 is fixed as with FeS mol ratio:1, and react
3 equilibrium constant is more than 105, so that SO3Reaction is complete.
6. a kind of be used to realize the continuous on-line detection method of sulfur trioxide in the flue gas any one of claim 1-5
Device, it is characterised in that including sampling pipe, first passage and second channel, the import of the sampling pipe is connected with flue, described
The outlet of sampling pipe is connected with first passage and second channel respectively, and the first flue gas analyzer is provided with the first passage,
Fluidized-bed reactor and the second flue gas analyzer, the fluidized-bed reactor are disposed with the second channel from front to back
Inside being placed with can be with SO3Reaction generation chemical property is stable, is not easy to condense, be easy to the solid salt particles of the gas of detection.
7. device according to claim 6, it is characterised in that be located at the two of solid salt particles in the fluidized-bed reactor
Side is respectively arranged with sieve plate.
8. device according to claim 6, it is characterised in that the fluidized-bed reactor is arranged vertically.
9. device according to claim 6, it is characterised in that heating furnace is provided with outside the fluidized-bed reactor, it is described
Thermocouple is configured with heating furnace.
10. device according to claim 6, it is characterised in that first flowmeter, are additionally provided with the first passage
One sampling pump and the first valve, second flowmeter, the are additionally provided with positioned at the rear end of fluidized-bed reactor on the second channel
Two sampling pumps and the second valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710867597.3A CN107515280A (en) | 2017-09-22 | 2017-09-22 | The continuous on-line detection method and device of sulfur trioxide in a kind of flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710867597.3A CN107515280A (en) | 2017-09-22 | 2017-09-22 | The continuous on-line detection method and device of sulfur trioxide in a kind of flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107515280A true CN107515280A (en) | 2017-12-26 |
Family
ID=60726520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710867597.3A Pending CN107515280A (en) | 2017-09-22 | 2017-09-22 | The continuous on-line detection method and device of sulfur trioxide in a kind of flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107515280A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085101A (en) * | 2018-10-25 | 2018-12-25 | 浙江三尼科技有限公司 | A kind of flue gas soluble matter continuously monitors analysis method and system on-line |
| CN112129898A (en) * | 2020-10-30 | 2020-12-25 | 江苏方天电力技术有限公司 | Device and method for on-line monitoring of sulfur trioxide concentration in coal-fired flue gas |
| CN113447604A (en) * | 2021-05-28 | 2021-09-28 | 中国石油化工股份有限公司 | Be arranged in simultaneous detection flue gas SO2、SO3Apparatus and method of |
| CN114636786A (en) * | 2021-11-19 | 2022-06-17 | 清华大学 | Device and method for detecting sulfur trioxide or sulfuric acid mist in flue gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854184A (en) * | 2012-09-07 | 2013-01-02 | 天津世纪动力科技发展有限公司 | Special measurement system for concurrently measuring ammonia gas and nitrogen oxide in motor tail gas |
| US20140127094A1 (en) * | 2012-11-02 | 2014-05-08 | Strategic Metals Ltd. | Processing of sulfate and/or sulfide-rich waste using co2-enriched gases to sequester co2, reduce environmental impacts including acid rock drainage and produce reaction products |
| CN106248442A (en) * | 2016-09-06 | 2016-12-21 | 山东能工低碳科技有限公司 | SO in a kind of detection flue gas3method and system |
| CN106289884A (en) * | 2016-09-06 | 2017-01-04 | 山东能工低碳科技有限公司 | A kind of SO3the method and device of on-line checking |
| CN106353457A (en) * | 2016-09-06 | 2017-01-25 | 山东能工低碳科技有限公司 | Method and system for detecting flue gas SO3 based on salt absorption |
| CN207301017U (en) * | 2017-09-22 | 2018-05-01 | 武汉凯迪电力环保有限公司 | The continuous on-line detection device of sulfur trioxide in a kind of flue gas |
-
2017
- 2017-09-22 CN CN201710867597.3A patent/CN107515280A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854184A (en) * | 2012-09-07 | 2013-01-02 | 天津世纪动力科技发展有限公司 | Special measurement system for concurrently measuring ammonia gas and nitrogen oxide in motor tail gas |
| US20140127094A1 (en) * | 2012-11-02 | 2014-05-08 | Strategic Metals Ltd. | Processing of sulfate and/or sulfide-rich waste using co2-enriched gases to sequester co2, reduce environmental impacts including acid rock drainage and produce reaction products |
| CN106248442A (en) * | 2016-09-06 | 2016-12-21 | 山东能工低碳科技有限公司 | SO in a kind of detection flue gas3method and system |
| CN106289884A (en) * | 2016-09-06 | 2017-01-04 | 山东能工低碳科技有限公司 | A kind of SO3the method and device of on-line checking |
| CN106353457A (en) * | 2016-09-06 | 2017-01-25 | 山东能工低碳科技有限公司 | Method and system for detecting flue gas SO3 based on salt absorption |
| CN207301017U (en) * | 2017-09-22 | 2018-05-01 | 武汉凯迪电力环保有限公司 | The continuous on-line detection device of sulfur trioxide in a kind of flue gas |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085101A (en) * | 2018-10-25 | 2018-12-25 | 浙江三尼科技有限公司 | A kind of flue gas soluble matter continuously monitors analysis method and system on-line |
| CN109085101B (en) * | 2018-10-25 | 2024-03-22 | 浙江三尼科技有限公司 | Continuous online monitoring and analyzing method and system for smoke solubles |
| CN112129898A (en) * | 2020-10-30 | 2020-12-25 | 江苏方天电力技术有限公司 | Device and method for on-line monitoring of sulfur trioxide concentration in coal-fired flue gas |
| CN113447604A (en) * | 2021-05-28 | 2021-09-28 | 中国石油化工股份有限公司 | Be arranged in simultaneous detection flue gas SO2、SO3Apparatus and method of |
| CN114636786A (en) * | 2021-11-19 | 2022-06-17 | 清华大学 | Device and method for detecting sulfur trioxide or sulfuric acid mist in flue gas |
| CN114636786B (en) * | 2021-11-19 | 2024-04-19 | 清华大学 | Device and method for detecting sulfur trioxide or sulfuric acid mist in flue gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107515280A (en) | The continuous on-line detection method and device of sulfur trioxide in a kind of flue gas | |
| US9410872B2 (en) | Exhaust gas flowmeter and exhaust gas analyzing system | |
| CN105300744B (en) | A kind of system of coal steam-electric plant smoke NO and mercury sampling and detection simultaneously | |
| CN102803943A (en) | Breath Condensate Sampler And Detector And Breath/breath Condensate Sampler And Detector | |
| CN103472061A (en) | Device and method for detecting sulfur trioxide in flue gas on line | |
| CN106855472A (en) | A kind of stationary source particulate Hg and gaseous mercury isokinetic sampling device and the method for sampling | |
| US9301709B2 (en) | Method for optimizing the gas conversion rate in a respiratory gas analyzer | |
| US8021617B2 (en) | Flue gas monitoring and dynamic spiking for sulfur trioxide/sulfuric acid | |
| CN106248442B (en) | SO in a kind of detection flue gas3Method | |
| CN106596198A (en) | Online SO3 measuring system and method | |
| CN104457852A (en) | On-line monitoring system for greenhouse gas emission of fixed combustion source | |
| CN109342284A (en) | A kind of detection system and detection method for harmful substances from flue gases | |
| CN112147287A (en) | Online measurement system and method for HCl in flue gas | |
| CN207301017U (en) | The continuous on-line detection device of sulfur trioxide in a kind of flue gas | |
| CN108414299A (en) | A kind of stationary source exhaust gas sampling apparatus and the method for sampling | |
| CN103207250B (en) | Method for testing ammonia escape of flue gas denitrification system | |
| CN203490171U (en) | Online detection device for sulfur trioxide in smoke | |
| CN105891382A (en) | Gas-liquid separating and sampling device and gas sampling method | |
| CN106289884A (en) | A kind of SO3the method and device of on-line checking | |
| CN107655728A (en) | The device and method of low volatility trace element sampling monitoring suitable for flue gas | |
| JP2007271460A (en) | Method and instrument for measuring mercury in coal combustion exhaust gas | |
| CN112129898A (en) | Device and method for on-line monitoring of sulfur trioxide concentration in coal-fired flue gas | |
| CN207248580U (en) | One kind is based on flue-gas temperature and thermostat water bath coolant controlled SO3Sampling system | |
| CN206563669U (en) | A kind of stationary source particulate Hg and gaseous mercury isokinetic sampling's device | |
| CN207730502U (en) | The device of low volatility trace element sampling monitoring suitable for flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |