CN110243638A - A kind of smoke collecting apparatus and method for SCR denitration device - Google Patents
A kind of smoke collecting apparatus and method for SCR denitration device Download PDFInfo
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- CN110243638A CN110243638A CN201910413731.1A CN201910413731A CN110243638A CN 110243638 A CN110243638 A CN 110243638A CN 201910413731 A CN201910413731 A CN 201910413731A CN 110243638 A CN110243638 A CN 110243638A
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- flue gas
- smoke collecting
- absorption bottle
- gas
- serpentine condenser
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- 239000000779 smoke Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 161
- 239000003546 flue gas Substances 0.000 claims abstract description 161
- 238000005070 sampling Methods 0.000 claims abstract description 62
- 239000007789 gas Substances 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000011156 evaluation Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 64
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 44
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 32
- 229910021529 ammonia Inorganic materials 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 3
- 239000012159 carrier gas Substances 0.000 claims 1
- 239000003054 catalyst Substances 0.000 abstract description 10
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 238000013473 artificial intelligence Methods 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000005619 thermoelectricity Effects 0.000 description 3
- 241000270295 Serpentes Species 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
Abstract
The invention discloses a kind of smoke collecting apparatus and method for SCR denitration device, belong to SCR denitration device performance and catalyst performance detection and evaluation field.The present invention can acquire reaction inner flue gas of the stove using flue gas sampling pump with regime flow flow velocity, it is not influenced by exhaust gas volumn in external thermal power plant's denitrification apparatus or laboratory reacting furnace and pressure, at the uniform velocity stablize precise acquisition inner flue gas of the stove, so that flue gas is sufficiently reacted with absorbent, by the instruction of wet flow indicator, exhaust gas volumn volume is measured, the start and stop of PLC controller intelligent control flue gas sampler, the type of intelligence switching acquisition flue gas are passed through.It is consistent in temperature holding and external reactors in smoke collecting device, the under test gas of precise acquisition designated volume amount, have many advantages, such as that system artificial intelligence, acquisition flue gas flow rate is uniform, acquisition flue gas volume amount is accurate, device is easy to carry, is with a wide range of applications.
Description
Technical field
It is the invention belongs to SCR denitration device performance detection and evaluation field, in particular to a kind of for SCR denitration device
Smoke collecting apparatus and method.
Background technique
The situation is tense for Environmental Protection in China at present, and fired power generating unit fume side needs to reduce in flue gas by desulphurization and denitration and dedusting
The concentration of sulfur dioxide, nitrogen oxides and particulate matter.So requiring to carry out effect to the performance of desulphurization and denitration and dust-extraction unit
Evaluation.In-service unit mainly uses selective catalytic reduction (SCR) denitration technology, and the core component in the technology is catalysis
Agent, and the management of the row cycle lie for the national games of catalyst is particularly important.Index that there are many performances of evaluation catalyst, such as activity,
Denitration efficiency, the escaping of ammonia, SO2/SO3Conversion ratio and some physicochemical properties etc..Either evaluate live denitrification apparatus or laboratory
Inner evaluation catalyst performance, all multi-index parameters are required to extract flue gas out of denitrating catalyst reacting furnace and measure,
The device of this secondary design is to measure ammonia density, SO3Concentration, such as application No. is 201620574029.5 Chinese patents.Fire
Power plant's denitration SCR reaction unit is in air-introduced machine front end, so the outlet of thermal power plant's scene SCR reaction unit flue gas measuring point is negative
Pressure, laboratory SCR denitration test platform are positive pressure, and exhaust gas volumn is by the practical economizer exit exhaust gas volumn of unit and catalyst
Volume determines, so the exhaust gas volumn and pressure that are directed in every unit lab platform are all different.Cause in this way flue gas without
Method is sufficiently mixed with absorbing liquid reacts, therefore how constant flow current stabilization speed accurately comes out smoke collecting, be detection ammonia density,
SO3One important link of concentration index.
Summary of the invention
The purpose of the present invention is for fume extraction air-flow during SCR denitration device smoke collecting it is uneven it is unstable,
Exhaust gas volumn inaccuracy reacts insufficient incomplete problem with absorbing liquid, by the understanding to problem, proposes a kind of for SCR
The smoke collecting apparatus and method of denitrification apparatus.
Technical solution used by the present invention solves the above problems is: a kind of smoke collecting dress for SCR denitration device
It sets, characterized in that including electronic valve, filter device, absorption bottle, fixed device, the connecting line with heat tracing thermocouple, wet type
Flowmeter, drying device, flue gas sampling pump, shell, serpentine condenser inlet valve, absorption bottle inlet valve, serpentine condenser, flue gas
Acquire pipeline；The flue-gas collection pipelines are connect by electronic valve with filter device, the filter device respectively with absorption bottle and
Serpentine condenser connection, and absorption bottle inlet valve and snakelike is separately installed in the import of absorption bottle and the import of serpentine condenser
Condenser pipe inlet valve, the absorption bottle is on a fixed device, and the absorption bottle and serpentine condenser are by with heat tracing warm
The connecting line of galvanic couple is connect with wet flow indicator, and the wet flow indicator, drying device, flue gas sampling pump are sequentially connected, institute
Flue gas sampling pump is stated to be connected to exhanst gas outlet；The filter device, absorption bottle, wet flow indicator, drying device, flue gas sampling pump
It is respectively positioned in shell with serpentine condenser.
It further, further include temperature controller, PLC command reception ultramagnifier, PLC controller, control panel；The temperature controller
It is connect respectively with the connecting line and control panel for having heat tracing thermocouple, the control panel is also connect with PLC controller, institute
It states PLC controller and passes through PLC command reception ultramagnifier and electronic valve and flue gas sampling pump connection respectively.
Further, smoke collecting device includes intelligent temperature control heat-insulation system, smoke absorption system, smoke collecting power with
Intelligent measuring system, smoke collecting control system；The intelligent temperature control heat-insulation system is mainly by intelligent temperature controller, heating mantle, electricity
Heater strip, thermocouple and insulating layer are constituted；The smoke absorption system is mainly by flue-gas collection pipelines, absorption bottle, snakelike condensation
Pipe, filter device and smoke collecting pipe fixed block are constituted；The smoke collecting power and intelligent measuring system are mainly by carrying gas
Supply line, wet flow indicator, flue gas drying device, flue gas sampling pump and fixed device are constituted；Smoke collecting control system
System is mainly by PLC controller, control panel, smart electronics valve, control power supply and valve switch electric power generating composition；Smoke collecting dress
The performance evaluation for denitration SCR catalyst in thermal power plant's denitration SCR device performance detection and laboratory is set, wherein predominantly detecting
Index be ammonia density and SO3Concentration；When Testing index is ammonia density, which mainly acquires the ammonia in flue gas
Ingredient passes through the stable flue gas for acquiring certain volume in reacting furnace of flue-gas collection pipelines to absorption bottle；When Testing index is SO3It is dense
When spending, by valve transfer to serpentine condenser, the SO in designated volume exhaust gas volumn is acquired3。
Further, the intelligent temperature control heat-insulation system realizes adjusting of the flue-gas temperature at 300 DEG C ~ 420 DEG C, to protect
The temperature demonstrate,proved in entire smoke collecting device in collection process is consistent with the flue-gas temperature in reacting furnace, and passes through thermocouple
The temperature point feedback moment adjusts the heated condition of each section electric heating wire, keeps temperature in entire intelligent temperature control heat-insulation system
Unanimously.
Further, the smoke absorption system is mainly used for being connected with flue gas in reacting furnace, will react inner flue gas of the stove
It is directed into the set smoke collecting device, flue gas to be measured is collected in absorption bottle or serpentine condenser；When smoke collecting starts, touching
Control panel issues instruction to PLC controller and opens smart electronics valve, and flue gas is entered in absorption bottle by filter device；Work as survey
When measuring ammonia in flue gas concentration, absorption bottle is provided with the dilute sulfuric acid of enough concentration as absorbing liquid；As measurement SO3When concentration, open
Serpentine condenser inlet valve carries out SO3The acquisition of flue gas uses the isopropanol of enough concentration as absorbing liquid.
Further, the smoke collecting power and intelligent measuring system provide power for acquisition flue gas, and accurately measure
The volume of acquired flue gas；Exhaust gas volumn every time in test reacting furnace is all different, therefore enters the pressure of smoke collecting device flue gas
Power is different, this but also pump it is necessary to install flue gas sampling additional so that the throughput into smoke collecting device is steady,
And flue gas can sufficiently be reacted with the absorbing liquid in absorption bottle or be come into full contact with serpentine condenser；Wet flow indicator is used to measure to adopt
Collect the volume of flue gas and enters the gas pressure before wet flow indicator.
Further, the smoke collecting control system, inputs relevant parameter on the control panel, passes through PLC controller
Command adapted thereto is issued, the electronic valve and starting/stopping flue gas sampling pump of air inlet is opened/closed, opens/closes serpentine condenser and enter
Mouth valve and absorption bottle inlet valve.
Further, the flue-gas collection pipelines are mainly used for the flue gas introduced in reacting furnace, and flue gas carrying is flowed through
Entire smoke collecting device, post-processes until flue gas is drained into outside smoke collecting device；It is described with heat tracing thermocouple
The material of connecting line can choose internal treated smooth glass material, and intelligent temperature control system is used outside pipeline
System is kept the temperature.
Further, the filter device be mainly used for by the flue gas in thermal power plant's denitrification apparatus and laboratory reacting furnace into
Row filtering.When smoke collecting device, which is applied to thermal power plant's denitrification apparatus, to be evaluated, the flue gas of acquisition is after power plant boiler burns
Flue gas, the impurity such as dust are more in flue gas, need to be filtered using the filter device.When smoke collecting device is applied in fact
When testing room SCR catalyst performance evaluation, though being laboratory experiment platform, catalyst sample etc. in power plant's operation is usually also had
It is detected, exists so also having certain density dust in flue gas, also have one when reacting in additional reacting furnace
The generation of quantitative ammonium hydrogen sulfate avoids dust and sulphur so filter membrane is needed to be filtered the flue gas for entering filter device
Sour hydrogen ammonium etc. blocks smoke collecting device.Periodically to replace filter membrane, it is ensured that flue gas passes through.
Further, the wet flow indicator is mainly used for the wet flue gas flow that smoke collecting device is flowed through in metering, meter
Numerical quantity also closes the standard of entrance electronics threshold switch and flue gas sampling switch pump as input PLC controller control；Wet type
It selects anti-corrosion heat-resisting alloy just to make in flowmeter, prevents high-temperature flue gas from corroding equipment.
Further, the drying device is mainly used for dry flowed out by wet flow indicator and is prepared to enter into flue gas sampling pump
Interior flue gas, this time the moisture content in dry abjection flue gas primarily into the flue gas in flue gas sampling pump be dry flue gas, this
Sample dry flue gas will not generate damage to the pump housing, be conducive to the operation steady in a long-term of flue gas sampling pump；It is loaded in the drying device
Desiccant is generally enough silica gel, periodically drying replacement.
Further, the flue gas sampling pump, in order to provide stable flue gas flow to smoke collecting device.Acquisition every time
Flue gas flow can be set by control panel, needed flue gas sampling to pump and stablized flue gas flow rate, it is ensured that flue gas flow.Flue gas sampling pump
Start and stop controlled by smoke collecting control system；Stainless steel or heat-resisting alloy steel can be selected in the material of the flue gas sampling pump, really
Guarantor's acidic flue gas flows through flue gas sampling pump will not be by pump housing corrosion damage.
Further, the PLC controller is connected with control panel, issues sampling starting/stopping by control panel and refers to
It enables, to control starting/stopping of air inlet electronic valve and flue gas sampling pump；Specified exhaust gas volumn and flue gas stream are arranged by control panel
Speed, when wet flow indicator display exhaust gas volumn, which reaches, presets exhaust gas volumn, PLC controller issues instruction and closes air inlet electronic valve
And stop sampling pump operating；Control panel can control switching acquisition ammonia density or SO3Concentration is issued by PLC controller
Instruction, control enter unlatching/closing of absorption bottle or serpentine condenser valve.
Further, the smart electronics valve is controlled by PLC, and pumping initial stage electronic valve is opened, and makes flue-gas collection pipelines
It is connected to inner flue gas of the stove is reacted.Pumping volume is arranged in control panel every time, is measured by wet flow indicator, works as wet flow indicator
It when measured value reaches designated value, is controlled by PLC and stops flue gas sampling pump work, and close smart electronics valve, disconnect smoke collecting
The connection of pipeline and reacting furnace.
The course of work is as follows: inner flue gas of the stove temperature is inputted first in control panel, smoke collecting device is by intelligent temperature control
Heat-insulation system preheating, and smoke collecting device various places inside temperature in control sampling process is detected by thermocouple and keeps it from change,
Until sampling terminates；After system warm-up, specified exhaust gas volumn volume is inputted on the control panel and extracts flow velocity, selection acquisition
Flue gas type, and click starting；It is issued and is instructed by PLC controller, successively switch serpentine condenser inlet valve or absorption bottle entrance
Valve, starting flue gas sampling pump, opens air inlet electronic valve；After the registration of wet flow indicator reaches presetting flue gas volume, by PLC
Controller issues instruction, successively closes air inlet electronic valve, flue gas sampling pump serpentine condenser inlet valve or absorption bottle inlet valve；Phase
Between any time by the stop button on control panel, close air inlet electronic valve, stop flue gas sampling pump, terminate gas and adopt
Sample；After sampling, intelligent temperature control system stops heating and being cooled to room temperature.
Compared with prior art, the present invention having the following advantages that and effect:
For problem of the existing technology, the present invention has made several point designs, configures a flue gas sampling pump, sampling pump first
Stable draft is provided for acquisition flue gas, either in the negative pressure condition or laboratory experiment platform at thermal power plant scene just
Pressure, sampling pump can stability contorting enter the gas flow and flow velocity of flue-gas collection pipelines air extractor.Matched is wet
Formula flowmeter completes the smoke collecting of specified amount volume as exhaust gas volumn counting device.Secondly by smoke collecting control system,
Intelligent control entrance samples starting/stopping of electronic valve and flue gas sampling pump, enters in intelligent control smoke collecting device and absorbs
Starting/stopping of bottle or serpentine condenser valve, and flue gas sampling pump and exits and entrances valve can be orderly opened/close, in this way
It can be with the exhaust gas volumn volume of precise acquisition preset value.The absorption system for possessing filter device again can convey acquisition quality more
Flue gas that is high, removing impurity enters absorption bottle or serpentine condenser, thermal power plant's denitrification apparatus higher for dust concentration, filtering
Device is very necessary.Finally by intelligent temperature control heat-insulation system, it is ensured that when flue gas circulates in entire pipeline equipment temperature with
It is consistent to react in-furnace temperature, there is no making flue gas volume change because of thermal perturbation, to guarantee that exhaust gas volumn volume is adopted
The accuracy of collection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure: electronic valve 1, filter device 2, absorption bottle 3, fixed device 4, the connecting line 5 with heat tracing thermocouple are wet
Formula flowmeter 6, drying device 7, flue gas sampling pump 8, shell 9, temperature controller 10, PLC command reception ultramagnifier 11, serpentine condenser
Inlet valve 12, absorption bottle inlet valve 13, PLC controller 14, control panel 15, serpentine condenser 16, flue-gas collection pipelines 17.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to Fig. 1, the smoke collecting device for SCR denitration device in the present embodiment, including electronic valve 1, filtering dress
2 are set, absorption bottle 3, fixed device 4, the connecting line 5 with heat tracing thermocouple, wet flow indicator 6, drying device 7, flue gas is adopted
Sample pump 8, shell 9, serpentine condenser inlet valve 12, absorption bottle inlet valve 13, serpentine condenser 16, flue-gas collection pipelines 17；
Flue-gas collection pipelines 17 are connect by electronic valve 1 with filter device 2, filter device 2 respectively with absorption bottle 3 and snakelike condensation
Pipe 16 connects, and is separately installed with absorption bottle inlet valve 13 and snakelike in the import of absorption bottle 3 and the import of serpentine condenser 16
Condenser pipe inlet valve 12, absorption bottle 3 are located on fixed device 4, and absorption bottle 3 and serpentine condenser 16 are by having heat tracing thermoelectricity
Even connecting line 5 is connect with wet flow indicator 6, and wet flow indicator 6, drying device 7, flue gas sampling pump 8 are sequentially connected, flue gas
Sampling pump 8 is connected to exhanst gas outlet；Filter device 2, absorption bottle 3, wet flow indicator 6, drying device 7, flue gas sampling pump 8 and snake
Shape condenser pipe 16 is respectively positioned in shell 9.
It further include temperature controller 10, PLC command reception ultramagnifier 11, PLC controller 14, control panel 15；Temperature controller 10 divides
It not being connect with the connecting line 5 and control panel 15 for having heat tracing thermocouple, control panel 15 is also connect with PLC controller 14,
PLC controller 14 is connect by PLC command reception ultramagnifier 11 with electronic valve 1 and flue gas sampling pump 8 respectively.
Smoke collecting device includes intelligent temperature control heat-insulation system, smoke absorption system, smoke collecting power and intelligent metering
System, smoke collecting control system；Intelligent temperature control heat-insulation system is mainly by intelligent temperature controller 10, heating mantle, electric heating wire, thermoelectricity
Even summation insulating layer is constituted；Smoke absorption system is mainly by flue-gas collection pipelines 17, absorption bottle 3, serpentine condenser 16, filter device
2 and smoke collecting pipe fixed block constitute；Smoke collecting power and intelligent measuring system are mainly by carrying gas supply line, wet type stream
Meter 6, flue gas drying device 7, flue gas sampling pump 8 and fixed device 4 are constituted；Smoke collecting control system is mainly controlled by PLC
Device 14, control panel 15, smart electronics valve 1, control power supply and valve switch electric power generating composition；The smoke collecting device is used for thermoelectricity
The performance evaluation of denitration SCR catalyst in factory's denitration SCR device performance detection and laboratory, wherein the index predominantly detected is ammonia
Concentration and SO3Concentration；When Testing index is ammonia density, which mainly acquires the ammonia ingredient in flue gas, passes through
Flue-gas collection pipelines 17 stablize the flue gas of certain volume in acquisition reacting furnace to absorption bottle 3；When Testing index is SO3When concentration,
By valve transfer to serpentine condenser 16, the SO in designated volume exhaust gas volumn is acquired3。
Intelligent temperature control heat-insulation system realizes adjusting of the flue-gas temperature at 300 DEG C ~ 420 DEG C, to guarantee to adopt in entire flue gas
Temperature in acquisition means in collection process is consistent with the flue-gas temperature in reacting furnace, and by electric thermo-couple temperature measuring point feed back when
The heated condition for carving adjustment each section electric heating wire keeps the consistent of temperature in entire intelligent temperature control heat-insulation system.
Smoke absorption system is mainly used for being connected with flue gas in reacting furnace, and reaction inner flue gas of the stove is directed into the set flue gas
Acquisition device collects flue gas to be measured in absorption bottle 3 or serpentine condenser 16；When smoke collecting starts, control panel 15 is touched
Instruction is issued to PLC controller 14 and opens smart electronics valve 1, and flue gas is entered in absorption bottle 3 by filter device 2；Work as measurement
When ammonia in flue gas concentration, absorption bottle 3 is provided with the dilute sulfuric acid of enough concentration as absorbing liquid；As measurement SO3When concentration, snake is opened
Shape condenser pipe inlet valve 12 carries out SO3The acquisition of flue gas uses the isopropanol of enough concentration as absorbing liquid.
Smoke collecting power and intelligent measuring system provide power for acquisition flue gas, and the accurate First Astronautic Research Institute for Measurement and Test acquires flue gas
Volume；Exhaust gas volumn every time in test reacting furnace is all different, therefore the pressure for entering smoke collecting device flue gas is different, this
But also making the throughput into smoke collecting device steady it is necessary to install a flue gas sampling pump 8 additional, and flue gas can be with suction
The absorbing liquid received in bottle 3 is sufficiently reacted or is come into full contact with serpentine condenser 16；Wet flow indicator 6 is used to measure acquisition flue gas
Gas pressure before volume and entrance wet flow indicator 6.
Smoke collecting control system inputs relevant parameter on control panel 15, issues corresponding finger by PLC controller 14
It enables, opens/closes the electronic valve 1 and starting/stopping flue gas sampling pump 8 of air inlet, open/close 12 He of serpentine condenser inlet valve
Absorption bottle inlet valve 13.
The course of work is as follows: inner flue gas of the stove temperature is inputted first in control panel 15, smoke collecting device is by intelligent temperature
Heat-insulation system preheating is controlled, and smoke collecting device various places inside temperature in control sampling process is detected by thermocouple and is kept it from
Become, until sampling terminates；After system warm-up, specified exhaust gas volumn volume is inputted on control panel 15 and extracts flow velocity, choosing
Acquisition flue gas type is selected, and clicks starting；By PLC controller 14 issue instruct, successively switch serpentine condenser inlet valve 12 or
Absorption bottle inlet valve 13, starting flue gas sampling pump 8, opens air inlet electronic valve 1；When the registration of wet flow indicator 6 reaches presetting
It after flue gas volume, is issued and is instructed by PLC controller 14, successively close air inlet electronic valve 1, flue gas sampling pumps 8 serpentine condensers and enters
Mouth valve 12 or absorption bottle inlet valve 13；Any time period by the stop button on control panel 15, closes air inlet electronic valve
1, stop flue gas sampling pump 8, terminates gas sampling；After sampling, intelligent temperature control system stops heating and being cooled to room temperature.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology should belong to guarantor of the invention in made change without departing from the spirit and scope of the invention
Protect range.
Claims (8)
1. a kind of smoke collecting device for SCR denitration device, characterized in that including electronic valve (1), filter device (2) is inhaled
It receives bottle (3), fixed device (4), the connecting line (5) with heat tracing thermocouple, wet flow indicator (6), drying device (7), cigarette
Gas sampling pump (8), shell (9), serpentine condenser inlet valve (12), absorption bottle inlet valve (13), serpentine condenser (16), flue gas
It acquires pipeline (17)；The flue-gas collection pipelines (17) connect by electronic valve (1) with filter device (2), the filter device
(2) it is connect respectively with absorption bottle (3) and serpentine condenser (16), and in the import of absorption bottle (3) and serpentine condenser (16)
Import is separately installed with absorption bottle inlet valve (13) and serpentine condenser inlet valve (12), and the absorption bottle (3) is located at fixed dress
It sets on (4), the connecting line (5) and wet type of the absorption bottle (3) and serpentine condenser (16) by having heat tracing thermocouple
Flowmeter (6) connection, the wet flow indicator (6), drying device (7), flue gas sampling pump (8) are sequentially connected, and the flue gas is adopted
Sample pump (8) is connected to exhanst gas outlet；The filter device (2), absorption bottle (3), wet flow indicator (6), drying device (7), cigarette
Gas sampling pump (8) and serpentine condenser (16) are respectively positioned in shell (9).
2. the smoke collecting device according to claim 1 for SCR denitration device, characterized in that further include temperature controller
(10), PLC command reception ultramagnifier (11), PLC controller (14), control panel (15)；The temperature controller (10) respectively with band
Have heat tracing thermocouple connecting line (5) and control panel (15) connection, the control panel (15) also with PLC controller (14)
Connection, the PLC controller (14) is respectively by PLC command reception ultramagnifier (11) and electronic valve (1) and flue gas sampling pump (8)
Connection.
3. a kind of working method for the smoke collecting device of SCR denitration device as claimed in claim 1 or 2, feature
It is that smoke collecting device includes intelligent temperature control heat-insulation system, smoke absorption system, smoke collecting power and intelligent measuring system,
Smoke collecting control system；The intelligent temperature control heat-insulation system is mainly by intelligent temperature controller (10), heating mantle, electric heating wire, heat
Galvanic couple and insulating layer are constituted；The smoke absorption system is mainly by flue-gas collection pipelines (17), absorption bottle (3), serpentine condenser
(16), filter device (2) and smoke collecting pipe fixed block are constituted；The smoke collecting power is with intelligent measuring system mainly by taking
Carrier gas supply line, wet flow indicator (6), flue gas drying device (7), flue gas sampling pump (8) and fixed device (4) are constituted；Institute
Smoke collecting control system is stated mainly by PLC controller (14), control panel (15), smart electronics valve (1), control power supply and valve
Door switch electric power generating composition；The smoke collecting device is urged for thermal power plant's denitration SCR device performance detection with denitration SCR in laboratory
The performance evaluation of agent, wherein the index predominantly detected is ammonia density and SO3Concentration；When Testing index is ammonia density, the cigarette
Gas acquisition device mainly acquires the ammonia ingredient in flue gas, stablizes certain volume in acquisition reacting furnace by flue-gas collection pipelines (17)
Flue gas to absorption bottle (3)；When Testing index is SO3When concentration, by valve transfer to serpentine condenser (16), specified body is acquired
SO in product exhaust gas volumn3。
4. the working method of the smoke collecting device according to claim 3 for SCR denitration device, characterized in that institute
Intelligent temperature control heat-insulation system is stated, adjusting of the flue-gas temperature at 300 DEG C ~ 420 DEG C is realized, to guarantee in entire smoke collecting device
Temperature in interior collection process is consistent with the flue-gas temperature in reacting furnace, and feeds back moment adjustment by electric thermo-couple temperature measuring point
The heated condition of each section electric heating wire keeps the consistent of temperature in entire intelligent temperature control heat-insulation system.
5. the working method of the smoke collecting device according to claim 3 for SCR denitration device, characterized in that institute
It states smoke absorption system to be mainly used for being connected with flue gas in reacting furnace, reaction inner flue gas of the stove is directed into set smoke collecting dress
It sets, flue gas to be measured is collected in absorption bottle (3) or serpentine condenser (16)；When smoke collecting starts, touch control panel (15)
Instruction is issued to PLC controller (14) and opens smart electronics valve (1), and flue gas enters absorption bottle (3) by filter device (2)
It is interior；When measuring ammonia in flue gas concentration, absorption bottle (3) is provided with the dilute sulfuric acid of enough concentration as absorbing liquid；As measurement SO3It is dense
It when spending, opens serpentine condenser inlet valve (12), carries out SO3The acquisition of flue gas uses the isopropanol of enough concentration as absorption
Liquid.
6. the working method of the smoke collecting device according to claim 3 for SCR denitration device, characterized in that institute
Smoke collecting power and intelligent measuring system are stated, provides power, and the volume of accurate First Astronautic Research Institute for Measurement and Test's acquisition flue gas for acquisition flue gas；
Every time test reacting furnace in exhaust gas volumn it is all different, therefore enter smoke collecting device flue gas pressure be different, this but also
It is necessary to install a flue gas sampling pump (8) additional to make the throughput into smoke collecting device steady, and flue gas energy and absorption bottle
(3) absorbing liquid in is sufficiently reacted or is come into full contact with serpentine condenser (16)；Wet flow indicator (6) is used to measure acquisition flue gas
Volume and enter wet flow indicator (6) before gas pressure.
7. the working method of the smoke collecting device according to claim 3 for SCR denitration device, characterized in that institute
Smoke collecting control system is stated, inputs relevant parameter on control panel (15), is issued by PLC controller (14) and is accordingly referred to
It enables, opens/closes the electronic valve (1) and starting/stopping flue gas sampling pump (8) of air inlet, open/close serpentine condenser inlet valve
(12) and absorption bottle inlet valve (13).
8. the working method according to any one of claim 3-7 for the smoke collecting device of SCR denitration device,
It is characterized in, process is as follows: inputs inner flue gas of the stove temperature in control panel (15) first, smoke collecting device is protected by intelligent temperature control
Warm system warm-up, and smoke collecting device various places inside temperature in control sampling process is detected by thermocouple and keeps it from change, directly
Terminate to sampling；After system warm-up, specified exhaust gas volumn volume is inputted on control panel (15) and extracts flow velocity, selection is adopted
Collect flue gas type, and clicks starting；By PLC controller (14) issue instruct, successively switch serpentine condenser inlet valve (12) or
Absorption bottle inlet valve (13), starting flue gas sampling pump (8) are opened air inlet electronic valve (1)；When the registration of wet flow indicator (6) reaches
It to after presetting flue gas volume, is issued and is instructed by PLC controller (14), successively close air inlet electronic valve (1), flue gas sampling pump
(8) serpentine condenser inlet valve (12) or absorption bottle inlet valve (13)；Any time period on control panel (15) by stopping
Only button is closed air inlet electronic valve (1), and flue gas sampling pump (8) is stopped, and terminates gas sampling；After sampling, intelligent temperature control system
System stops heating and being cooled to room temperature.
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| CN110715551A (en) * | 2019-09-27 | 2020-01-21 | 华电电力科学研究院有限公司 | Ventilation device and method for preparing and calcining SCR (Selective catalytic reduction) honeycomb denitration catalyst |
| CN110954377A (en) * | 2019-12-03 | 2020-04-03 | 华电电力科学研究院有限公司 | SO in flue gas based on condensation separation3Detection device and method |
| CN112162530A (en) * | 2020-08-25 | 2021-01-01 | 嘉兴新嘉爱斯热电有限公司 | Control system and method for CMES (China Mobile communications System) blowing system |
| CN114323624A (en) * | 2022-01-12 | 2022-04-12 | 四川大学 | Device and method for detecting anti-suck-back effect of dental high-speed turbine handpiece |
| CN115792079A (en) * | 2022-10-20 | 2023-03-14 | 国能唯真(山东)测试分析有限公司 | Method for measuring ammonium sulfate and ammonium bisulfate in coal-fired flue gas |
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| CN115792079A (en) * | 2022-10-20 | 2023-03-14 | 国能唯真(山东)测试分析有限公司 | Method for measuring ammonium sulfate and ammonium bisulfate in coal-fired flue gas |
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