CN110275000A - A kind of continuous on-line monitoring system of flue gas and method - Google Patents
A kind of continuous on-line monitoring system of flue gas and method Download PDFInfo
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- CN110275000A CN110275000A CN201910695412.4A CN201910695412A CN110275000A CN 110275000 A CN110275000 A CN 110275000A CN 201910695412 A CN201910695412 A CN 201910695412A CN 110275000 A CN110275000 A CN 110275000A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 306
- 239000003546 flue gas Substances 0.000 title claims abstract description 306
- 238000012544 monitoring process Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 68
- 238000005070 sampling Methods 0.000 claims abstract description 35
- 238000004868 gas analysis Methods 0.000 claims abstract description 28
- 238000007791 dehumidification Methods 0.000 claims abstract description 25
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 22
- 231100000719 pollutant Toxicity 0.000 claims abstract description 22
- 238000011282 treatment Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 239000000112 cooling gas Substances 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 7
- 238000012952 Resampling Methods 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 abstract description 5
- 239000003517 fume Substances 0.000 abstract description 4
- 239000003245 coal Substances 0.000 description 22
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 235000019504 cigarettes Nutrition 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- -1 flue sampler Chemical compound 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of continuous on-line monitoring system of flue gas and methods, belong to fume emission continuous monitoring technical field.The present invention includes flue gas sampling unit, flue gas Dehumidifying element, flue gas deep cooling capture unit and flue gas analysis unit, and flue gas sampling unit is connected with the flue of flue gas；Flue gas sampling unit is connected through flue gas Dehumidifying element with flue gas analysis unit by pipeline, and flue gas deep cooling capture unit is provided between flue gas Dehumidifying element and flue gas analysis unit.The present invention is to progress deep cooling trapping after flue gas dehumidification treatments, wherein temperature≤0 DEG C of cold-trap flue gas, then the pollutant in flue gas is monitored using flue gas analysis unit again, by successively carrying out handling except wet purification and deep cooling trapping to flue gas, the interference component being mingled in flue gas is effectively reduced, to promote the accuracy of flue gas pollutant monitoring.
Description
Technical field
The present invention relates to fume emission continuous monitoring technical fields, continuously supervise online more specifically to a kind of flue gas
Examining system and method.
Background technique
With the fast development of science and technology and global economy, environmental pollution and ecological disruption are on the rise, air quality
It is continuous to deteriorate.It controls and reduces environmental pollution and be not only a kind of action by government and to enforce, and be a kind of nationality
Consciousness.Atmospheric environment pollution monitoring system is then to be controlled and mitigated the essential primary dress of air environmental pollution work
It is standby.For the monitoring of flue gas sampling, analysis in carbon industry, continuous emission monitoring system of flue gas CEMS just seems
It is particularly important.Conventional CEMS includes flue gas sampling unit, flue gas transmission unit, flue gas pretreatment unit and flue gas analysis unit
Equal component parts.
It often will appear monitoring data during carbon flue gas monitoring and the case where deviation occur, those skilled in the art is logical
Often it is considered that measurement result is wrong caused by existing due to reactant gas and compressibility gas etc., it is believed that these gases exist
It may react in the flow process of flue or they can be liquefied in the lower extraction sampling system of temperature, adsorb
Or just it is polymerize before reaching analyzer.But combine carbon preparation analysis it is found that aluminium with carbon industry usually with
Petroleum coke is raw material, and being aided with coal tar pitch by calcining is adhesive, is processed into the anode products of various specifications.In each of production
There is a large amount of industrial dust to overflow in process, can especially be generated in molding asphalt melting, kneading, forming process a large amount of
Asphalt smoke, bitumen flue gas loss point dispersion, if administering method is improper during actual motion, easily causes pitch
Flue gas escapes.Furthermore bitumen flue gas ingredient is extremely complex, containing hundreds of substances with certain degree of harm, is under normal conditions
The glance coal heating for using purified treatment is washed, still resulting in 10% in time is remained, and flue gas monitoring is interfered.It is existing
In technology, those skilled in the art does not consider influence of the glance coal to equipment monitoring, for current carbon industry
For, needing to design a needle can be improved the device of on-line monitoring stability, continuously accurately and reliably monitor mesh to reach
's.
Through retrieving, a kind of title of innovation and creation are as follows: the anti-blocking dehumidifying sample devices in flue gas continuous and automatic monitoring system
(number of patent application: CN201720521763.X, the applying date: 2017-05-11), including sequentially connected demister, anti-blocking dress
It sets, heating and dehumidification device and flue gas sampling machine, heating and dehumidification device includes the outer tube, interior that circumference is set gradually to ecto-entad
Casing and heating tube assembly, heating tube assembly include the first intermediate tube, the second intermediate tube and are set to the first intermediate tube, in second
Between pipe periphery heating tube, the first intermediate tube and the coaxial arrangement of the second intermediate tube and it is intermediate be equipped with gap, for wet process
The gypsum slurries carried secretly in desulfurization fume are removed.But present application still can not rule out glance coal to the shadow of monitoring device
It rings.
In addition, the title of innovation and creation are as follows: the continuous on-line monitoring system of flue gas (application number: CN201811534954.5, Shen
Please day: 2018-12-14), including flue sampler, heat tracing pipe, flue gas pretreatment system, HC remover and flue gas concentration analysis
Instrument, wherein heat tracing pipe is connected with flue sampler；Flue gas pretreatment system is connected with heat tracing pipe, before carrying out concentration analysis to flue gas
Pretreatment；The upstream or downstream of flue gas pretreatment system is arranged in HC remover, and HC remover includes ventilation pipe and adds
Thermal part；Flue gas concentration analyzer is connected with flue gas pretreatment system or HC remover, for eliminating hydrocarbon to purple
The interference of external spectrum or infrared spectroscopy monitor.But the device of present application still not can guarantee CEMS Real-time Monitoring Data
Accuracy.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art, the pollutant in flue gas is difficult to carry out the deficiency of accurate measurements,
A kind of continuous on-line monitoring system of flue gas and method are provided, successively flue gas trap except wet purification, deep cooling, passes through removal
Interfering substance in flue gas pollutant monitoring process, to improve the accuracy of flue gas monitoring.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
The continuous on-line monitoring system of a kind of flue gas of the invention, including flue gas sampling unit, flue gas Dehumidifying element, flue gas are deep
Cold trapping unit and flue gas analysis unit, wherein flue gas sampling unit is connected with the flue of flue gas；Flue gas sampling unit passes through pipe
Road is connected through flue gas Dehumidifying element with flue gas analysis unit, and flue gas depth is provided between flue gas Dehumidifying element and flue gas analysis unit
Cold trapping unit.
Preferably, the air inlet of flue gas Dehumidifying element is connected with flue gas sampling unit, the gas outlet of flue gas Dehumidifying element with
Flue gas deep cooling capture unit is connected, and is disposed with dehumidification device and first between the air inlet and air outlet of flue gas Dehumidifying element
Filter.
Preferably, refrigeration part, the cooling air inlet of flue gas deep cooling capture unit are provided in flue gas deep cooling capture unit
It is connected with the gas outlet of flue gas Dehumidifying element, the cooling gas outlet of flue gas deep cooling capture unit is connected with flue gas analysis unit, cold
But the second filter is provided between air inlet and cooling gas outlet.
Preferably, flue gas transmission unit, flue gas transmission unit are provided between flue gas sampling unit and flue gas Dehumidifying element
Inside it is provided with heating element.
Preferably, dehumidification device is dehumidification by condensation device or desiccant dehumidification device.
Preferably, condenser temperature T≤0 DEG C of flue gas deep cooling capture unit.
Preferably, it is provided with condensate drain mouth on the second filter of flue gas deep cooling capture unit, the port of condensate drain mouth extends to
The outside of flue gas deep cooling capture unit.
Preferably, filter core, pore size filter≤2 μm of filter core are provided in flue gas sampling unit.
A kind of method of monitoring concentration of flue gas pollutants of the invention, flue gas carry out deep cooling trapping after dehumidification treatments,
Wherein after cold-trap flue gas temperature≤0 DEG C, then the pollutant in flue gas is monitored using flue gas analysis unit again.
Preferably, the specific steps are as follows: flue gas is adopted using the flue gas sampling unit of filter element filtering precision d≤2 μm
Sample simultaneously filters；Flue gas after resampling filter is heated in flue gas transmission unit, wherein heating temperature >=120 DEG C, then cigarette
Gas enters flue gas Dehumidifying element and carries out dehumidification treatments, and wherein flue gas Dehumidifying element is cooling dehumidifier, the condensation of cooling dehumidifier
Temperature is 2~6 DEG C；Flue gas after dehumidifying enters flue gas deep cooling capture unit, temperature≤0 DEG C of flue gas after cold-trap, then uses
Flue gas analysis unit is monitored the pollutant in flue gas.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
(1) the continuous on-line monitoring system of a kind of flue gas of the invention, including flue gas sampling unit, flue gas Dehumidifying element, cigarette
Gas deep cooling capture unit and flue gas analysis unit, wherein flue gas sampling unit is connected with the flue of flue gas；Flue gas sampling unit is logical
Piping is connected through flue gas Dehumidifying element with flue gas analysis unit, is provided with cigarette between flue gas Dehumidifying element and flue gas analysis unit
Gas deep cooling capture unit improves conventional CEMS system by creative, can carry out deep cooling to the flue gas after dehumidifying and catch
Collection processing, effectively removes the interfering substance in flue gas pollutant monitoring process, to reach the mesh for improving flue gas monitoring accuracy
's；
(2) the continuous on-line monitoring system of a kind of flue gas of the invention, sets between flue gas Dehumidifying element and flue gas analysis unit
It is equipped with flue gas deep cooling capture unit, flue gas Dehumidifying element is for removing the moisture in flue gas, flue gas deep cooling capture unit
Deep cooling trapping is carried out to remaining glance coal, flue gas Dehumidifying element and flue gas deep cooling capture unit cooperate, go to improve
Except the effect of glance coal in flue gas, influence of the chaff interferent to system monitoring is avoided；
(3) method of a kind of monitoring concentration of flue gas pollutants of the invention, flue gas carry out deep cooling after dehumidification treatments and catch
Collection, wherein temperature≤0 DEG C of cold-trap flue gas, is then again monitored the pollutant in flue gas using flue gas analysis unit.Cigarette
By dehumidifying and deep cooling trapping processing its smoke components being mingled with can be effectively reduced, to promote the accuracy of flue gas monitoring in gas.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the continuous on-line monitoring system of flue gas of the invention；
Fig. 2 is the schematic diagram of internal structure figure of the flue gas Dehumidifying element of embodiment 1；
Fig. 3 is the structural schematic diagram of the flue gas deep cooling capture unit of embodiment 1；
Fig. 4 is a kind of flow chart of the method for monitoring concentration of flue gas pollutants of the invention.
Label declaration in schematic diagram:
100, flue；
200, flue gas sampling unit；
300, flue gas transmission unit；
400, flue gas Dehumidifying element；410, dehumidification device；420, first filter；
500, flue gas deep cooling capture unit；510, cooling air inlet；520, cooling gas outlet；530, condensate drain mouth；531, it holds
Mouthful；540, refrigeration part；550, the second filter；
600, flue gas analysis unit.
Specific embodiment
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing, wherein of the invention
Element and feature are identified by appended drawing reference.
Structure depicted in this specification attached drawing, ratio, size etc., only to cooperate the revealed content of specification,
So that those skilled in the art understands and reads, enforceable qualifications are not intended to limit the invention, therefore do not have technology
On essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size can be generated not influencing the present invention
The effect of and the purpose that can reach under, should all still fall in the range of disclosed technology contents obtain and can cover.Together
When, cited such as "upper", "lower", "left", "right", " centre " term in this specification are merely convenient to the clear of narration,
Rather than to limit enforceable range, relativeness is altered or modified, under the content of no substantial changes in technology, when also regarding
For the enforceable scope of the present invention；In addition to this, it is not independent from each other between each embodiment of the invention, but can be with
It is combined.
Embodiment 1
As shown in Figure 1, the continuous on-line monitoring system of a kind of flue gas of the invention, by changing to conventional CEMS system
Into, be in series with deep cooling capturing device in the back segment of flue gas pretreatment unit, to flue gas carry out dehumidification treatments after and to flue gas carry out
Deep cooling trapping, effectively removes the interfering substance in flue gas pollutant monitoring process, improves flue gas monitoring accuracy to reach
Purpose.
The continuous on-line monitoring system of a kind of flue gas of the invention, including flue gas sampling unit 200, flue gas Dehumidifying element 400,
Flue gas deep cooling capture unit 500 and flue gas analysis unit 600；Wherein flue gas sampling unit 200 is connected with the flue 100 of flue gas,
Flue gas enters flue gas sampling unit 200 from flue 100 and carries out primary filtration, is provided with filter core, filter core in flue gas sampling unit 200
Pore size filter≤2 μm avoid impurity from damaging monitoring system for removing the large granular impurity being mingled in flue gas.Flue gas sampling
The outlet of unit 200 is connected with flue gas Dehumidifying element 400, and flue gas Dehumidifying element 400 is mainly used for moisture in flue gas and residual
Remaining particulate matter carries out that it is single to be provided with the trapping of flue gas deep cooling between flue gas Dehumidifying element 400 and flue gas analysis unit 600 except wet purification
Member 500, flue gas deep cooling capture unit 500 remove the chaff interferent in flue gas by trapping to flue gas deep cooling.Flue gas Dehumidifying element
400 and flue gas deep cooling capture unit 500 cooperate, the residual rate of chaff interferent in flue gas can be mitigated and reduced in flue gas
The difficulty of chaff interferent removal, while the maintenance cost of monitoring system can also be reduced.The flue gas of removal chaff interferent continues to move to cigarette
The accurate measurements of the progress flue gas pollutant of gas analytical unit 600.
It is worth noting that there is the problem of deviation in the Real-time Monitoring Data that conventional CEMS system is frequently present of flue gas,
Cause the monitoring fault phenomenon of flue gas pollutant to occur again and again, brings extreme difficulties to smoke gas treatment, in the prior art not
People puts forward effective solutions.And applicant of the present invention by previous smoke components and instrument monitoring result experiment,
Analysis show that the very big reason that error occurs in flue gas monitoring is: during carbon baking, the pitch as adhesive can be heated
It forms glance coal and is entrained in flue gas, still remain in the flue gas after washed tower and electrostatic supplementary set tar device purified treatment
Glance coal.And exactly remaining glance coal measures equipment steadily in the long term in the presence of interference, especially for CEMS equipment zero point
Drift effect is caused, occurs the deviation of Real-time Monitoring Data appearance caused by deviation so as to cause Real-time Monitoring Data.But
In carbon industry, those skilled in the art does not have found glance coal interference caused by flue gas monitoring, in addition, the prior art
In also without relevant document record by exclude glance coal to instrument interference raising flue gas monitoring accuracy method.
And the setting flue gas deep cooling between conventional fume treatment unit and flue gas monitoring unit that proposes of the invention traps
Unit 500, and according to the component characteristic of flue gas, it effectively removes the glance coal in flue gas and is accurately supervised to reach air environmental pollution object
The purpose of survey.
The air inlet of flue gas Dehumidifying element 400 is connected (as shown in Figure 2) with flue gas sampling unit 200, and flue gas dehumidifying is single
Dehumidification device 410 and first filter 420 are disposed between the air inlet and air outlet of member 400.The dehumidifying of the present embodiment
Device 410 can be dehumidification by condensation device, such as compressor condenser, semiconductor cooling condenser, by reducing flue gas Dehumidifying element 400
It is set to export dew point≤4 DEG C；Dehumidification device 410 or desiccant dehumidification device, such as Nafion pipe drier.Due in flue gas
Glance coal mainly exists in the form of the thin object grain of 0.1~1.0 μm of tar, after flue gas enters flue gas Dehumidifying element 400, is condensing
Under the influence of dehumidification equipment (2~6 DEG C are removed wet temp), large quantity of moisture is converted into liquid in flue gas, and the condensate liquid of generation can be certainly
It is dynamic to collect and flue gas Dehumidifying element 400 is discharged.Filtering accuracy≤2 μm of first filter 420, the purified flue gas that dehumidifies is through
Enter flue gas deep cooling capture unit 500 after the filtering of one filter 420.It should be noted that with the continuous progress of flue gas emission,
Flue gas Dehumidifying element 400 removes moisture substantially, still remains a large amount of glance coals in flue gas at this time, can not effectively trap removing,
And extreme influence is caused to the monitoring of flue gas, and conventional flue gas monitoring device is typically only capable to carry out preliminary treatment to flue gas, this
Invention overcomes the prejudice of the prior art, creative to increase flue gas deep cooling capture unit 500 after flue gas Dehumidifying element 400,
To solve influence of the remaining glance coal to flue gas monitoring in flue gas.
The gas outlet of flue gas Dehumidifying element 400 is connected with the cooling air inlet 510 of flue gas deep cooling capture unit 500, flue gas
It being provided in deep cooling capture unit 500 refrigeration part 540 (as shown in Figure 3), refrigeration part 540 has stable refrigeration performance,
In view of moisture in flue gas and the condensation point cross characteristic of glance coal, a large amount of steam are removed by flue gas Dehumidifying element 400,
But a large amount of glance coals are still remained in the filtered flue gas of dehumidifying, flue gas deep cooling capture unit 500 controls refrigeration part 540
Condenser temperature T≤0 DEG C, the flue gas after flue gas Dehumidifying element 400 avoid the occurrence of ice blockage problem.The trapping of flue gas deep cooling is single
The cooling gas outlet 520 of member 500 is connected with flue gas analysis unit 600, sets between cooling air inlet 510 and cooling gas outlet 520
It is equipped with the second filter 550.Glance coal can increase its particle diameter by condensation, be provided with ratio in the second filter 550
The biggish active material adsorbent of surface area, and adsorbent is avoided to chemically react with glance coal, the second filter 550 is used for
Filter pitch smoke particle.It should be noted that can dismantle, replace, clean for the ease of the second filter 550, the second filter
550 material can be ceramics, glass, stainless steel etc..Condensate drain mouth 530, condensate drain mouth 530 are additionally provided on second filter 550
Port 531 extend to the outside of flue gas deep cooling capture unit 500 and adopted in the present embodiment for condensate liquid to be discharged in time
Condensate drain mode can be peristaltic pump or control valve.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: the invention also includes flue gas transmission unit 300,
Flue gas transmission unit 300 is set between flue gas sampling unit 200 and flue gas Dehumidifying element 400, is set in flue gas transmission unit 300
It is equipped with heating element, heat tracing temperature >=120 DEG C, the flue gas filtered through flue gas sampling unit 200 still has surplus heat, and flue gas transmits
Twin-core gas circuit is additionally provided in unit 300, which is respectively used to flue gas sampling transmission and total system calibration, if not right
Flue gas carries out heating and thermal insulation, causes flue gas to be condensed into particle in flue gas transmission unit 300 and is attached in twin-core gas circuit, thus
Calibration of the influence system to flue gas.
Embodiment 3
As shown in figure 4, a kind of method of monitoring concentration of flue gas pollutants of the invention, flue gas carry out after dehumidification treatments
Deep cooling trapping, wherein temperature≤0 DEG C of cold-trap flue gas, then again using flue gas analysis unit 600 to the pollutant in flue gas into
Row monitoring.Successively after except wet purification and deep cooling trapping, the glance coal in flue gas can be effectively reduced, to promote flue gas in flue gas
The accuracy of monitoring.
Specific step is as follows for a kind of method of monitoring concentration of flue gas pollutants of the invention:
(1) flue gas is sampled and is filtered using the flue gas sampling unit 200 of filter element filtering precision d≤2 μm, avoid cigarette
Granule foreign in gas damages system；
(2) flue gas after resampling filter is heated in flue gas transmission unit 300, wherein heating temperature >=120 DEG C, and
Flue gas enters flue gas Dehumidifying element 400 and carries out except wet purification afterwards, and wherein the condensation temperature of dehumidification by condensation device is generally 2~6 DEG C, this
When flue gas in a large amount of steam form condensate liquid, the condensate liquid of generation can be collected automatically and flue gas Dehumidifying element 400 is discharged；
(3) flue gas after dehumidifying enters in flue gas deep cooling capture unit 500 progress deep cooling trapping, and the temperature of cold-trap flue gas≤
0 DEG C, glance coal can increase its particle diameter by deep cooling effect, and the biggish work of specific surface area is provided in the second filter 550
Property substance adsorber, and adsorbent is avoided to chemically react with glance coal, the second filter 550 is for filtering glance coal
Grain；
(4) flue gas pollutant is monitored using flue gas analysis unit 600, at this time the chaff interferent glance coal quilt in flue gas
Sufficiently filtering, to solve the interference effect of glance coal, and guarantees the accuracy of CEMS Real-time Monitoring Data.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited to
These embodiments, but modified, the omission, example that can be appreciated that including those skilled in the art according to the detailed description of front
Any and whole embodiments of combination, adaptive change and/or replacement between such as each embodiment.Restriction in claim
The language according to used in claim and widely explained, and be not limited in foregoing detailed description or implement should
The example described during application, these examples should be considered as nonexcludability.It is in office where to arrange in method or process claims
Any step lifted can execute in any order and be not limited to the sequence proposed in claim.Therefore, model of the invention
Enclosing only to be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai really
It is fixed.
Claims (10)
1. a kind of continuous on-line monitoring system of flue gas, it is characterised in that: including flue gas sampling unit (200), flue gas Dehumidifying element
(400), flue gas deep cooling capture unit (500) and flue gas analysis unit (600), wherein flue gas sampling unit (200) and flue gas
Flue (100) is connected；Flue gas sampling unit (200) is by pipeline through flue gas Dehumidifying element (400) and flue gas analysis unit (600)
It is connected, flue gas deep cooling capture unit (500) is provided between flue gas Dehumidifying element (400) and flue gas analysis unit (600).
2. the continuous on-line monitoring system of a kind of flue gas according to claim 1, it is characterised in that: flue gas Dehumidifying element
(400) air inlet is connected with flue gas sampling unit (200), and the gas outlet of flue gas Dehumidifying element (400) and flue gas deep cooling trap
Unit (500) be connected, be disposed between the air inlet and air outlet of flue gas Dehumidifying element (400) dehumidification device (410) and
First filter (420).
3. the continuous on-line monitoring system of a kind of flue gas according to claim 1, it is characterised in that: flue gas deep cooling capture unit
(500) it is provided on refrigeration part (540), cooling air inlet (510) and the flue gas dehumidifying of flue gas deep cooling capture unit (500) are single
The gas outlet of first (400) is connected, the cooling gas outlet (520) and flue gas analysis unit (600) of flue gas deep cooling capture unit (500)
It is connected, is provided with the second filter (550) between cooling air inlet (510) and cooling gas outlet (520).
4. the continuous on-line monitoring system of a kind of flue gas according to claim 1, it is characterised in that: flue gas sampling unit
(200) it is provided between flue gas Dehumidifying element (400) flue gas transmission unit (300), is provided in flue gas transmission unit (300)
Heating element.
5. the continuous on-line monitoring system of a kind of flue gas according to claim 1, it is characterised in that: dehumidification device (410) is
Dehumidification by condensation device or desiccant dehumidification device.
6. the continuous on-line monitoring system of a kind of flue gas according to claim 1, it is characterised in that: flue gas deep cooling capture unit
(500) condenser temperature T≤0 DEG C.
7. the continuous on-line monitoring system of a kind of flue gas according to claim 3, it is characterised in that: flue gas deep cooling capture unit
(500) it is provided with condensate drain mouth (530) on the second filter (550), the port (531) of condensate drain mouth (530) extends to flue gas depth
The outside of cold trapping unit (500).
8. the continuous on-line monitoring system of a kind of flue gas according to claim 1-7, it is characterised in that: flue gas sampling
Filter core, pore size filter≤2 μm of filter core are provided in unit (200).
9. a kind of method for monitoring concentration of flue gas pollutants, it is characterised in that: flue gas carries out deep cooling trapping after dehumidification treatments,
Temperature≤0 DEG C of flue gas after wherein condensation is cooling then again carries out the pollutant in flue gas using flue gas analysis unit (600)
Monitoring.
10. a kind of method for monitoring concentration of flue gas pollutants according to claim 9, it is characterised in that: use above-mentioned power
Benefit requires the continuous on-line monitoring system of flue gas described in 1-8 to be monitored flue gas, the specific steps are as follows:
(1) flue gas is sampled and is filtered using the flue gas sampling unit (200) of filter element filtering precision d≤2 μm；
(2) flue gas after resampling filter is heated in flue gas transmission unit (300), wherein heating temperature >=120 DEG C, then
Flue gas enters flue gas Dehumidifying element (400) and carries out dehumidification treatments, and wherein flue gas Dehumidifying element (400) is cooling dehumidifier or does
Dry dehumidifier, the condensation temperature of cooling dehumidifier are 2~6 DEG C；
(3) flue gas after dehumidifying, which enters, carries out deep cooling trapping, temperature≤0 of cold-trap flue gas in flue gas deep cooling capture unit (500)
DEG C, then the pollutant in flue gas is monitored using flue gas analysis unit (600).
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| CN112945887A (en) * | 2021-03-11 | 2021-06-11 | 西安交通大学 | Flue gas in-situ monitoring system and method |
| CN114047292A (en) * | 2021-10-30 | 2022-02-15 | 深圳世能科泰能源技术股份有限公司 | Flue gas analysis device with online monitoring function |
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