CN206756543U - A kind of denitration high-temperature flue gas sampling pretreatment unit - Google Patents
A kind of denitration high-temperature flue gas sampling pretreatment unit Download PDFInfo
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- CN206756543U CN206756543U CN201720647199.6U CN201720647199U CN206756543U CN 206756543 U CN206756543 U CN 206756543U CN 201720647199 U CN201720647199 U CN 201720647199U CN 206756543 U CN206756543 U CN 206756543U
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Abstract
The utility model belongs to flue gas analysis preconditioning technique field, is specifically related to a kind of denitration high-temperature flue gas sampling pretreatment unit.The denitration high-temperature flue gas sampling pretreatment unit of this patent, including sampling unit, pipeline heating unit and demarcation purging unit composition, in addition to pretreatment unit, described pretreatment unit include filter element and air pump unit in parallel.The pretreatment unit of this patent, advantages of simple is designed, the operation of intelligence control system can be coordinated, can manually be adjusted again, it is practical, and it is applied to laboratory and on-the-spot test, it is easy to promote.
Description
Technical field
The invention belongs to flue gas sampling equipment technical fields such as gas analysis, environment monitoring, energy-conservation detections, it is specifically related to
A kind of denitration high-temperature flue gas sampling pretreatment unit.
Background technology
Issue in 2010《Thermal power plant's nitrogen oxides technological policy for treatment》Advocate reasonable employment fuel and contamination control skill
The comprehensive preventive health measures that art is combined, combustion control technology and gas denitrifying technology are combined, to reduce coal-burning power plant's nitrogen oxidation
The discharge of thing.In numerous gas denitrifying technologies, selective catalytic reduction（Selective Catalytic Reduction,
SCR）It is the technology that denitration efficiency is higher, more ripe, its NOxRemoval efficiency can reach 80%~90%.In SCR denitration technology
In, denitration efficiency, SO to catalyst prod2/SO3The equivalent calculating of conversion ratio, the escaping of ammonia rate there is many influence factors,
And in these influence factors, and maximum is influenceed with the degree of purity of high-temperature flue gas.Therefore the pretreatment to high-temperature flue gas sampling proposes
Very high technical requirements, i.e. flue gas can not lose in measurement process, crystallize, this technical requirements to high temperature pretreatment unit
Also correspondingly mention.
Patent（CN2005317559U）The portable compound Flue Gas Pretreatment Device of double gas circuits includes intake channel, blowback
Composition, the patents such as gas path, high-temperature heating sampling pipe, condenser, drying tube, sampling pump, blowback pump remove water law with reference to condensation
Water law is removed with permeable membrane, can to the fume-dehydrating under low temperature, high- humility state to less than 15%, and using the design of double gas circuits
Dynamic real-time reference zero line is provided for follow-up flue gas measuring instrumentss, to suppress instrument drift problem to greatest extent.
But in the case that it can not be applied with high temperature, low humidity, it greatly have impact on its application.
Patent（CN105561765A）A kind of preprocess method and device for effectively absorbing flue gas escape ammonia, including absorb
Pond, atomization absorption threeway, smoke inlet pipe, absorbing liquid playpipe, absorbing liquid circulating pump, circulating electromagnetic valve, high temperature tracing system,
Absorbing liquid.The patent can avoid ammonia in flue gas from being reacted with sulfur dioxide, form hydrogen sulfate hinge, and be condensed with dust etc., viscous
It is connected on tube wall, declines the ammonia density in flue gas, causes measurement data not have representational problem.This method can be cigarette
Ammonia in gas, is dissolved in absorbing liquid to greatest extent, ammonia crystallization will not occur, the problems such as adhesion.It is only to solve
The problem of escape ammonia, and in the measurement in SCR denitration laboratory, also denitration efficiency, SO2/SO3The measurement demands such as conversion ratio, should
Patent can not solve problem above.
It can be seen that in existing flue gas sampling pretreatment unit, it is not a kind of suitable for SCR denitration experiment, pass through
High temperature pretreatment, it is possible to measure denitration efficiency, SO2/SO3The equivalent demand of conversion ratio, the escaping of ammonia rate, can be used for commenting
The flue gas sampling pretreatment unit and corresponding preprocess method of valency denitrating catalyst efficiency.
Goal of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of denitrating catalyst high-temperature flue gas pretreatment unit, the dress
Pipeline is put using high-temperature heating isothermal holding, equipment whole process is without cold spot, complete equipment heating-up temperature >=200 DEG C, ensure flue gas into
Divide and do not lose at utmost, and use intelligence control system, be easy to staff to operate, shorten the response time of equipment room.
Technical scheme
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
The denitration high-temperature flue gas sampling pretreatment unit of this patent, including sampling unit, pipeline heating unit and demarcation are blown
Unit composition is swept, in addition to pretreatment unit, described pretreatment unit include filter element and air pump unit in parallel.
In above-mentioned denitration high-temperature flue gas sampling pretreatment unit, described pretreatment unit is by the first magnetic valve, filtering
Unit, air pump unit in parallel and needle-valve flowmeter are sequentially connected composition；Described air pump unit in parallel includes sampling pump, sampling pump
It is connected on the pipeline of pretreatment unit, sampling pump is provided at both ends with shunt circuit, and the second needle-valve is provided with shunt circuit.
In above-mentioned denitration high-temperature flue gas sampling pretreatment unit, described demarcation purging unit includes the first scavenging pipeline
With the second demarcation scavenging pipeline, the first scavenging pipeline is sequentially connected and formed by the first needle-valve, first filter, the first capillary,
First scavenging pipeline is connected to the first magnetic valve；Second demarcation purging unit is sequentially connected group by the 3rd needle-valve and the second capillary
Into the second demarcation purging unit is connected to the rear end of air pump unit in parallel.
In above-mentioned denitration high-temperature flue gas sampling pretreatment unit, in addition to pressure sensor, described pressure sensor
It is arranged on the rear portion of sampling unit.
In above-mentioned denitration high-temperature flue gas sampling pretreatment unit, described sampling unit front end is provided with filter, mistake
Filter precision is 2um.
Beneficial effect：
1st, the denitrating catalyst high-temperature flue gas pretreatment unit of this patent can be suitably used for current denitrating catalyst lab scale, in
Examination, the requirement of full-scale performance detection platform point position, light to be moved easily, response is rapid fast, and fast reaction and can complete
Test, test data can store.
2nd, the denitrating catalyst high-temperature flue gas pretreatment unit of this patent, employs air pump unit in parallel, by air pump
Both ends form circulation, so as to form the reflowing result of sampling flue gas, have both ensured pipeline gas demand, while cause by pre- place
The flow for managing device output is more stable.This patent forms unnecessary flow circulation in pretreatment unit, so as to stablize cigarette
Flow in qi leel analyzer, it is in fact consistent with demand volume, it is also consistent with by the flow of filter, filter is extended with this
The service life of filter core；And the advantages of with the response time for shortening easy adsorbed gas.
3rd, the denitrating catalyst high-temperature flue gas pretreatment unit of this patent, equipment whole process is without cold spot, complete equipment heating temperature
>=200 DEG C of degree.Purging function is provided simultaneously with using preposition sampling, whole system possesses gas comparison function.The pre- place of this patent
Device is managed, solves the difficult point that current SCR denitration performance testing process surveys water and sulfur trioxide, the water in the present apparatus is complete
Journey is gaseous state, is not in condensed water, and the filter of use only filters dirt, will not remove vaporous water, it is ensured that water and sulfur trioxide
Do not lose（The detection of traditional sulfur trioxide can only use the measuring method sampled manually）.
4th, the scavenging pipeline of this patent is provided with capillary, and purge gas can be heated simultaneously, ensures to analysis
Gas and sample gas uniformity in instrument, avoid temperature error.Carry out the purging of pretreatment system before sampling simultaneously, can be more preferable
Guarantee sampling accuracy.
5th, blow valve port is located at the front and back end of aspiration pump respectively at the two of present apparatus design, it is ensured that flue gas can be just blown during purging
Analyzer, again can blowback sample lines, it is ensured that whole piece pipeline is in the range of purging.
6th, denitration high-temperature flue gas sampling preprocess method used by patent device, before sampling, pretreatment stage, point
Purged, and calibration process can be added for 2 times.Just blown successively during purging and blowback, it is ensured that pipeline is completed without dead angle, purging
Directly demarcated or sampled afterwards, demarcated and sample and carried out under similarity condition so that whole sampling process is more accurate.
7th, the pretreatment unit of this patent, advantages of simple is designed, the operation of intelligence control system can be coordinated, again can be manual
Ground is adjusted, practical, and is applied to laboratory and on-the-spot test, is easy to promote.
Brief description of the drawings
Fig. 1 is the denitration high-temperature flue gas sampling pretreatment unit structural representation of this patent.
Fig. 2 is the denitration high-temperature flue gas sampling pretreatment unit workflow schematic diagram of embodiment.
Fig. 3 is purging cellular construction schematic diagram；
Fig. 4 is demarcation cellular construction schematic diagram.
Embodiment
Embodiment 1
The denitration high-temperature flue gas sampling pretreatment unit of the present embodiment, including sampling unit 1, pipeline heating unit and demarcation
Unit composition is purged, in addition to pretreatment unit, described pretreatment unit include filter element and air pump unit in parallel.
As shown in figure 1, sampling unit 1 is made up of sampling feeler lever or sampling pipeline, and sampling feeler lever and sampling pipeline are adapted to
Acquisition operations under different operating modes.Sampling feeler lever uses high temperature samples feeler lever, and material is SS316L material feeler levers, can computer heating control
For temperature up to 250 DEG C, sampling feeler lever head can be arranged as required to the filter being convenient for changing, and filter is filtered using carborundum
Core, 2um filtering accuracies, it act as preventing in catalyst and detection line that fine dusts block, and prevent connection end from having cold spot to cause ammonium
Salt Crystallization Plugging.Sampling pipeline use high temperature sampling line, and its material is SS316L materials, and the stainless steel that internal EP levels polish
Pipeline.
Pretreatment unit is the major part for carrying out flue gas pretreatment, by the first magnetic valve 18, filter element, air pump in parallel
Unit and needle-valve flowmeter 12 are sequentially connected composition, and filter element is the second filter 17, can reach 0.1um using filtering accuracy
Stainless steel filter, its function for remove flue gas in flue dust, particulate matter；Air pump unit in parallel includes the pin of air pump 16 and second
Valve 15, the second needle-valve 15 form shunt circuit at the both ends of air pump 16, and big flow barrier film aspiration pump, Ke Yi great can be used by including air pump 16
Shorten the response time of easy adsorbed gas greatly.Always according to needs in the present embodiment, pretreatment unit is provided with pressure sensor
2, pressure sensor 2 is arranged on the front end of the first magnetic valve 18, and pressure sensor 2 is using the sensor for being resistant to 250 degree of high temperature, root
The pressure data monitored according to it can determine whether the stopping state in the sample gas circuit in monitoring process.Air pump unit and pin in parallel
Second solenoid valve 13 is additionally provided between valve flowmeter 12, temperature sensor 7 is arranged on the second filter 17 and air pump list in parallel
Between member, for implementing to measure flue-gas temperature.Flow of the needle-valve flowmeter 12 using corrosion resistance by force, with the regulation of high-precision needle-valve
Meter, it act as the flue gas flow that regulation flows into flue gas analyzer 11.Whole pipeline, joint can use stainless steel SS316L materials
Matter, EP levels are interior to polish or requires higher material, and must smooth, anti-corrosion, high temperature resistant.
Demarcation purging unit includes the first scavenging pipeline and the second demarcation scavenging pipeline, and the first scavenging pipeline is by the first needle-valve
5th, first filter 4, the first capillary 3 are sequentially connected composition, and nitrogen cylinder 6 is connected to the first needle-valve 5, and the first capillary 3 connects
To the first magnetic valve 18；Second demarcation purging unit is sequentially connected and formed by the 3rd needle-valve 9 and the second capillary 10, the second capillary
Pipe 10 is connected to second solenoid valve 13, and gas bottle 8 is connected to the 3rd needle-valve 9.First needle-valve 5, the 3rd needle-valve 9 control nitrogen respectively
The break-make of gas, gas, first filter 4 use ceramic element, and filtering accuracy reaches 0.1um stainless steel filter, its function
To filter out the particulate matter in N2 purge gass, the function of the first scavenging pipeline is purging aspiration pump front end pipeline and the residual in device
Thing, ensure before test to be clean in pipeline, test point, device；After the function of second demarcation scavenging pipeline is purging aspiration pump
Residue in end pipe road and device, and gas is provided for the demarcation of flue gas analyzer, improve analyzer precision.First capillary
3rd, the second capillary 10 act as pre-add hot nitrogen or gas, and guarantee entered in pretreatment unit and flue gas analyzer 11
Gas and sample gas uniformity, avoid temperature error.
The present embodiment also includes pipeline heating unit, and existing be wound in pipeline disposed outside heater strip can be used to add
Heat, tolerable temperature are up to 250 DEG C, and heater strip temperature regulating range is：0-230℃.
Using a kind of denitration high-temperature flue gas sampling pretreatment side of the denitration high-temperature flue gas sampling pretreatment unit of this patent
Method, including：
Step 1, sampling unit 1 is arranged into sampling location, is connected with monitoring point, then open pipeline heating unit,
Full line temperature is preheated to denitration high-temperature flue gas sampling pretreatment unit not less than 200 DEG C.
Step 2, the first scavenging pipeline is communicated to by pretreatment unit by the first magnetic valve 18, opens the first needle-valve 5, close
The second needle-valve 15 is closed, makes the nitrogen in nitrogen cylinder 6 after the heating of the first capillary 3, carrying out forward direction to pretreatment unit blows
Sweep.
After the completion of step 3, positive purging, the first needle-valve 5 is closed, the first scavenging pipeline is disconnected by the first magnetic valve 18,
And connect sampling unit 1 with pretreatment unit, open the second needle-valve 15 and the 3rd needle-valve 9, the gas in gas bottle 8 is by the
After the heating of two capillaries 10, reverse blow is carried out to pretreatment unit；, can be as needed after purging, to flue gas analysis
Instrument 11 is demarcated.
Step 4, above-mentioned steps all after the completion of, keep the first needle-valve 5, the 3rd needle-valve 9 to close, the second needle-valve 15 is opened, complete
Pre-processed into denitration high-temperature flue gas sampling, denitration high-temperature flue gas sampling pretreatment unit can carry out normal work, start to sample
And analyzed by flue gas analyzer 11.
Claims (5)
1. a kind of denitration high-temperature flue gas sampling pretreatment unit, including sampling unit, pipeline heating unit and demarcation purging unit
Composition, it is characterised in that：Also include pretreatment unit, described pretreatment unit includes filter element and air pump unit in parallel.
2. denitration high-temperature flue gas sampling pretreatment unit according to claim 1, it is characterised in that：Described pretreatment list
Member is sequentially connected and formed by the first magnetic valve, filter element, air pump unit in parallel and needle-valve flowmeter；Described air pump list in parallel
Member includes sampling pump, and sampling pump is connected on the pipeline of pretreatment unit, and sampling pump is provided at both ends with shunt circuit, and parallel connection is returned
The second needle-valve is provided with road.
3. denitration high-temperature flue gas sampling pretreatment unit according to claim 1 or 2, it is characterised in that：Described demarcation
Purge unit include the first scavenging pipeline and second demarcation scavenging pipeline, the first scavenging pipeline by the first needle-valve, first filter,
First capillary is sequentially connected composition, and the first scavenging pipeline is connected to the first magnetic valve；Second demarcation purging unit is by the 3rd pin
Valve and the second capillary are sequentially connected composition, and the second demarcation purging unit is connected to the rear end of air pump unit in parallel.
4. denitration high-temperature flue gas sampling pretreatment unit according to claim 3, it is characterised in that：Also include pressure sensing
Device, described pressure sensor are arranged on the rear portion of sampling unit.
5. denitration high-temperature flue gas sampling pretreatment unit according to claim 3, it is characterised in that：Described sampling unit
Front end is provided with filter, filtering accuracy 2um.
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| CN201720647199.6U CN206756543U (en) | 2017-06-06 | 2017-06-06 | A kind of denitration high-temperature flue gas sampling pretreatment unit |
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| CN201720647199.6U CN206756543U (en) | 2017-06-06 | 2017-06-06 | A kind of denitration high-temperature flue gas sampling pretreatment unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946205A (en) * | 2021-04-27 | 2021-06-11 | 南京呈禾信息科技有限公司 | Portable low-adsorption high-temperature pretreatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946205A (en) * | 2021-04-27 | 2021-06-11 | 南京呈禾信息科技有限公司 | Portable low-adsorption high-temperature pretreatment device |
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