CN207197590U - A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system - Google Patents
A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system Download PDFInfo
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- CN207197590U CN207197590U CN201721277437.5U CN201721277437U CN207197590U CN 207197590 U CN207197590 U CN 207197590U CN 201721277437 U CN201721277437 U CN 201721277437U CN 207197590 U CN207197590 U CN 207197590U
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- flue gas
- measuring cylinder
- gas flow
- nox
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- 239000003546 flue gas Substances 0.000 title claims abstract description 100
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000000523 sample Substances 0.000 claims abstract description 100
- 238000005070 sampling Methods 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 35
- 238000007664 blowing Methods 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 12
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 229910000679 solder Inorganic materials 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 6
- 238000006477 desulfuration reaction Methods 0.000 abstract description 2
- 230000023556 desulfurization Effects 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 28
- 229910021529 ammonia Inorganic materials 0.000 description 14
- 238000005507 spraying Methods 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 231100000572 poisoning Toxicity 0.000 description 5
- 230000000607 poisoning effect Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000012550 audit Methods 0.000 description 1
- ZETCGWYACBNPIH-UHFFFAOYSA-N azane;sulfurous acid Chemical compound N.OS(O)=O ZETCGWYACBNPIH-UHFFFAOYSA-N 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system, more particularly to flue gas field of measuring technique after power plant desulfurization denitration, first measuring cylinder including back-blowing device and in sampling flue, several second measuring cylinders and Duo Gen probe tubes, the back-blowing device is connected with first measuring cylinder, NOx flue gas measuring probes are equipped with first measuring cylinder and second measuring cylinder, first measuring cylinder described in all second measuring cylinder parallel communications, second measuring cylinder described in several described probe tube parallel communications, the probe tube is provided with multiple thief holes met to flue gas flow direction, the thief hole is distributed in the cigarette field of the sampling flue in mesh point.The utility model can be used in the inhomogeneities for solving the denitration SCR outlets sample point that domestic fired power generating unit is widely present, and solve the problems, such as denitration outlet NOx measurement and the NOX measured deviations at smoke stack emission mouth.
Description
Technical field
The utility model belongs to flue gas field of measuring technique after power plant desulfurization denitration, and in particular to a kind of power station denitration grid
Uiform section multiple spot differential pressure flue gas flow measuring system
Background technology
At present, China's environmental improvement is in the forward stage of bearing a heavy burden, and also needs to go into overdrive, assaults fortified position with all strength.2017, China
It will implement comprehensively《" 13 " ecological environmental protection is planned》, deeply implement big gas and water, Soil Pollution Control action plan, it is complete
Kind long-range monitoring Quality Monitoring Control System.In the case where Environmental is increasingly paid attention to, the pressure that power plant faces is certainly
Meeting will be increasing.Because power plant's sampling test point by mounting condition because being limited, denitration CEMS sampling test points are substantially unsatisfactory for《Gu
Determine particulate matter measure and the gaseous contaminant method of sampling in pollution sources exhaust》Point position is wanted in GB/T16157-1996
Ask, be also unsatisfactory for the requirement of thermal technology's sampling test point, cause measurement data relatively large deviation to be present with actual value.Again because current flue gas
It is sampled as extraction-type to sample, exhaust gas components skewness in flue, the sample gas for causing to adopt is without representativeness, existing measurement knot
Fruit exist environment protection digital be not inconsistent it is logical, denitration outlet NOx and actual value data deviation it is big, cause data to have the situation of conflict,
Have influence on green audit and control of the operations staff to ammonia spraying amount.
Just following problems may be encountered in this case：
1st, the NOx measurements before and after desulphurization and denitration are inaccurate, can influence ammonia spraying amount because the NOx that desulphurization and denitration exports is to use
In an important parameter of DCS control ammonia spraying amounts, if value measurement is inaccurate, certainly will cause ammonia crosses spray or few spray, directly affects
DS NOx Est value is up to standard.
2nd, desulphurization and denitration NOX measurements are inaccurate, environmental pollution caused by taking 600MW units as an example, by annual 5000 hours run
Calculate, the year ammonia spraying amount of 1 unit is about 1200T, and liquefied ammonia is converted to gas ammonia, and it is 700 that it, which expands multiple value,.Ammonia spraying amount is excessive, meeting
Cause the ammonia of escape to be diffused into air, easily form haze with micronic dust, surrounding environment is polluted.
If the NOx measurement for the 3, causing desulphurization and denitration catalyst poisoning desulphurization and denitration to export is bigger than normal, DCS meeting increases automatically
Add ammonia spraying amount.Due to the smoke distribution inequality of SCR catalyst layer, ammonia is excessive easily adheres to Sulfates thing in catalyst surface for spray
Matter, these sulfate species can cause catalyst poisoning, cause catalyst activity reduction, and to detect poisoning and generally require to shut down
It could carry out.Thus, it is found that poisoning is essentially all permanent poisoning, its catalytic performance can not be recovered.
4th, air preheater is caused to block, if ammonia spraying amount is too high, ammonia density is too high, and the forward direction of ammonia and nitrogen oxides can be promoted anti-
It should accelerate so that reaction product is the increase of bisulfite ammonia amount.The material is a kind of high viscous liquid material, and easily condensation is deposited on
Air preheater heat exchange element surface, is bonded together with fly ash granule in flue gas, blocks the passage of flue gas, increases air preheater pressure difference
Height, increase resistance of the flue gas by air preheater, heat exchange efficiency reduces, and needs stoppage in transit unit to carry out maintenance cleaning under serious conditions.
Therefore it is badly in need of a kind of inequality that can be used in solving the denitration SCR outlets sample point that domestic fired power generating unit is widely present
Even property, solve the problems, such as denitration outlet NOx measurement and the power station denitration grid uiform section of the NOX measured deviations at smoke stack emission mouth
Multiple spot differential pressure flue gas flow measuring system.
Utility model content
The purpose of this utility model is to provide a kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system,
It can be used in the inhomogeneities for solving the denitration SCR outlets sample point that domestic fired power generating unit is widely present, solve denitration outlet NOX
Measured value and the NOX measured deviation problems at smoke stack emission mouth.
The utility model provides following technical scheme：
A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system, including back-blowing device and be located at
Sample first measuring cylinder, several second measuring cylinders and the Duo Gen probe tubes in flue, the back-blowing device and described the
One measuring cylinder is connected, in one end of the close back-blowing device of first measuring cylinder and one end of second measuring cylinder
Provided with NOx flue gas measuring probes, the remote of the first measuring cylinder described in all second measuring cylinder parallel communications is provided with the NOx
One end of flue gas measuring probe, the remote of the second measuring cylinder described in several described probe tube parallel communications are provided with the NOx cigarettes
One end of gas measuring probe, the probe tube are provided with multiple thief holes met to flue gas flow direction, and the thief hole is in the sampling
It is distributed in the cigarette field of flue in mesh point.The back-blowing device keeps first measuring cylinder, the second measurement by blowback effect
It is unimpeded in cylinder and probe tube, free from dust obstruction；The remote of first measuring cylinder described in all second measuring cylinder parallel communications sets
There is one end of the NOx flue gases measuring probe, the remote of the second measuring cylinder described in several described probe tube parallel communications is provided with
One end of the NOx flue gases measuring probe, in order to ensure the NOx flue gases measuring probe measurement in first measuring cylinder
It is the mixed mixed flue gas of flue gas in second measuring cylinder of all connection first measuring cylinders, described second measures
What the NOx flue gases measuring probe in cylinder measured is the mixing in the probe tubes of all connection second measuring cylinders
The mixed flue gas of flue gas afterwards.NOx flue gas measuring probes are equipped with first measuring cylinder and second measuring cylinder, can be with
Difference between the flue gas of judgment part mixing and the flue gas measurement all mixed, so as to be advantageous to the measurement adjustment side in later stage
Case.The thief hole is distributed in the cigarette field of the sampling flue in mesh point, is the multiple spot used based on flue gas environmental monitoring
Sampling theory, i.e., by the way that each point is measured or extracted simultaneously in flue gas flow area, flue gas is mixed and measured again, is protected
Demonstrate,prove the accuracy that the measurement of the high-precision flow in the case of short and straight pipe section, flow field turbulent flow namely ensures measurement.
Preferably, the NOx flue gases measuring probe respectively with first measuring cylinder and second measuring cylinder
Pipeline is inserted in first measuring cylinder and second measuring cylinder in 5 degree of angles are oblique.The NOx flue gases measuring probe and pipeline
It is consistent with flue gas flow direction in the oblique insertion pipeline in 5 degree of angles.The NOx flue gases measuring probe is connected with pipeline using flange, flange
Disk size is consistent with the NOx flue gases measuring probe mounting flange size.
Preferably, the NOx flue gases measuring probe is externally provided with ceramic protective sleeve pipe.Protect the NOx flue gases measuring probe
In order to avoid by the abrasion of dust etc., so as to increase the service life of the NOx flue gases measuring probe.
Preferably, the close measurement site in the gap between the ceramic protective sleeve pipe and the NOx flue gases measuring probe
End be provided with and prevent filter screen that dust is dropped in the ceramic protective sleeve pipe.When dust is by gravity or the back-blowing device
Effect when can drop, be easily stuck in the gap of the NOx flue gases measuring probe and the ceramic protective sleeve pipe, influence to measure
Precision, cause measurement delay, provided with the filter screen dust can be avoided to fall into the NOx flue gases measuring probe and the ceramics guarantor
In the gap of protecting pipe, so as to be advantageous to the accuracy of measurement.
Preferably, the number of the thief hole is 24-36.In theory, it is more that points are extracted, it is more representative, but
Excessive sample point be clearly it is unpractical can not also realize, according to cross-sectional sizes, 24 points to 36 points measurements just think have substantially
It is representative.
Preferably, the probe tube is welded on by angle steel or stainless steel tube in the side wall of the sampling flue, and described
The solder side of the probe tube of sampling flue welding is provided with projection.It is weldingly fixed on using angle steel on the inside of the sampling flue,
The outlet section of the probe tube carries out dual face seals welding with the sampling flue.In welding process, the pipe of the probe tube
Wall can melt it is thinning, it is easily damaged, cause poor sealing, set with the solder side of the probe tube of the sampling flue welding
The problem of having projection to be welded at the projection, the probe tube breakage would not be caused to influence sealing, occurs.
Preferably, it is provided with groove in the projection.Solder is directly entered in the groove and the sampling flue during welding
The more fastening of welding is firm.
Preferably, first measuring cylinder is provided with the suction pump for exhausting close to one end of the back-blowing device.Work as cigarette
Grey flow velocity can use the suction pump exhausting when too low, accelerate the flow velocity of flue gas.
The beneficial effects of the utility model are：It can be used in solving the denitration SCR outlets that domestic fired power generating unit is widely present
The inhomogeneities of sample point, solve the problems, such as denitration outlet NOx measurement and the NOX measured deviations at smoke stack emission mouth.
Brief description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and a part for constitution instruction, with this practicality
New embodiment is used to explain the utility model together, does not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the utility model structure diagram；
Fig. 2 is part distribution schematic diagram of the thief hole in flue is sampled；
Fig. 3 is the structural relation figure of NOx flue gases measuring probe of the present utility model and ceramic protective sleeve pipe；
Fig. 4 is the part-structure schematic diagram of probe tube of the present utility model.
Wherein in figure mark for：1st, back-blowing device；2nd, the first measuring cylinder；3rd, the second measuring cylinder；4th, probe tube；41st, sample
Hole；42nd, projection；421st, groove；5th, NOx flue gases measuring probe；6th, ceramic protective sleeve pipe；7th, filter screen；8th, flue is sampled.
Embodiment
As Figure 1-4, a kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system, including blowback dress
Put 1 and first measuring cylinder 2, several second measuring cylinders 3 and Duo Gen probe tubes 4 in sampling flue 8, blowback
Device 1 is connected with the first measuring cylinder 2, in one end of one end of the close back-blowing device 1 of the first measuring cylinder 2 and the second measuring cylinder 3
NOx flue gases measuring probe 5 is equipped with, the remote NOx flue gases that are provided with of all the first measuring cylinders of parallel communication 2 of second measuring cylinder 3 are surveyed
One end of amount probe 5, the remote of several the second measuring cylinders of parallel communication 3 of probe tube 4 are provided with the one of NOx flue gases measuring probe 5
End, probe tube 4 are provided with multiple thief holes 41 met to flue gas flow direction, and thief hole 41 is in mesh point in the cigarette field of sampling flue 8
Distribution.Probe tube 4 is welded on by angle steel or stainless steel tube in the side wall of sampling flue 8, and sampling is weldingly fixed on using angle steel
The inner side of flue 8, outlet section and the sampling flue 8 of probe tube 4 carry out dual face seals welding.The number of thief hole 41 is 24-36,
In theory, extract more, the more representative but excessive sample point of counting be clearly it is unpractical can not also realize, according to
Cross-sectional sizes, 24 points to 36 points measurements just think representative substantially.Back-blowing device 1 keeps the first measurement by blowback effect
It is unimpeded in the 2, second measuring cylinder 3 of cylinder and probe tube 4, free from dust obstruction；All the first measuring cylinders of parallel communication 2 of second measuring cylinder 3
Away from the one end for being provided with NOx flue gases measuring probe 5, several the second measuring cylinders of parallel communication 3 of probe tube 4 away from being provided with
One end of NOx flue gases measuring probe 5, what it is in order to ensure the measurement of NOx flue gases measuring probe 5 in the first measuring cylinder 2 is all companies
The mixed mixed flue gas of flue gas in second measuring cylinder 3 of logical first measuring cylinder 2, the NOx flue gases measurement in the second measuring cylinder 3
What probe 5 measured is the mixed flue gas of the mixed flue gas in the probe tubes 4 of all connection second measuring cylinders 3.First surveys
In the measuring cylinder 3 of graduated cylinder 2 and second it is equipped with NOx flue gases measuring probe 5, it can be determined that the flue gas and all mix that part mixes
Difference between flue gas measurement, so as to be advantageous to the measurement Adjusted Option in later stage.Thief hole 41 sampling flue 8 cigarette field in be in
Mesh point is distributed, and is the multi-point sampling theory used based on flue gas environmental monitoring, i.e., by flue gas flow area while to each
Point is measured or extracted, and flue gas is mixed and measured again, ensures the high accuracy stream in the case of short and straight pipe section, flow field turbulent flow
Measurement namely ensures the accuracy of measurement.
Specifically, NOx flue gases measuring probe 5 is in respectively 5 degree with the pipeline in the first measuring cylinder 2 and the second measuring cylinder 3
In angle the first measuring cylinder 2 of oblique insertion and the second measuring cylinder 3.NOx flue gases measuring probe 5 and the first measuring cylinder 2 and the second measurement
It is consistent with flue gas flow direction in the oblique insertion pipeline in 5 degree of angles of pipeline in cylinder 3.NOx flue gases measuring probe 5 and the first measuring cylinder 2 and
Pipeline in second measuring cylinder 3 is connected using flange, ring flange size and the mounting flange size one of NOx flue gases measuring probe 5
Cause.NOx flue gases measuring probe 5 is externally provided with ceramic protective sleeve 6 and managed.NOx flue gases measuring probe 5 is protected in order to avoid mill by dust etc.
Damage, so as to increase the service life of NOx flue gases measuring probe 5.
Specifically, ceramic protective sleeve 6 manages the end in the close measurement site in the gap between NOx flue gases measuring probe 5
Provided with the filter screen 7 for preventing that dust from dropping in the pipe of ceramic protective sleeve 6.The meeting when effect of the dust by gravity or back-blowing device 1
From dropping, easily it is stuck in the gap of NOx flue gases measuring probe 5 and the pipe of ceramic protective sleeve 6, influences measurement accuracy, cause to measure
Hysteresis, can avoid dust from falling into the gap of NOx flue gases measuring probe 5 and the pipe of ceramic protective sleeve 6, so as to have provided with filter screen 7
Beneficial to the accuracy of measurement.
Specifically, the solder side of the probe tube 4 welded with sampling flue 8 is provided with projection 42.In welding process, probe tube
4 tube wall can melt thinning, easy breakage, cause poor sealing, and the solder side of the probe tube 4 welded with sampling flue 8 is set
The problem of having projection 42 to be welded at projection 42, the breakage of probe tube 4 would not be caused to influence sealing, occurs.
Specifically, it is provided with groove 421 in projection 42.Solder is directly entered in groove 421 during welding welds with sampling flue 8
More fastening it is firm.
The advantages of the present embodiment, is as follows：
1st, it can be used in the inhomogeneities for solving the denitration SCR outlets sample point that domestic fired power generating unit is widely present, solve
Denitration exports NOx measurement and the NOX measured deviation problems at smoke stack emission mouth.；
2nd, it is equipped with NOx flue gases measuring probe 5 in the first measuring cylinder 2 and the second measuring cylinder 3, it can be determined that what part mixed
Difference between flue gas and the flue gas measurement all mixed, can contrast and preferably judge the NOx's for sampling the flue gas in flue 8
Concentration.
The installation method of the present embodiment：
1st, A/B sides are exported on vertical sampling flue 8 and more probe tubes 4 is respectively set, be horizontally inserted vertical sampling flue
8, the pipeline of every probe tube 4 takes several thief holes 41, and thief hole 41 is met to flue gas flow direction and arranged；Probe tube 4 is in sampling cigarette
The domestic demand of road 8 is fixed, and the inner side of sampling flue 8 is weldingly fixed on using angle steel or stainless steel tube, the outlet section of probe tube 4 is with taking
Sample flue 8 carries out dual face seals welding.Need to build a workbench scaffold, convenient construction team inside sampling flue 8
5 work and personal safety protection；
2nd, reducing twice is carried out at the pipeline of measuring table vertical sampling pipe 4 first measuring cylinder 2 is installed, in the first measurement
5 degree of angles of pipeline of the Pipe installing NOx flue gases measuring probe 5 of cylinder 2, NOx flue gases measuring probe 5 and the first measuring cylinder 5 are oblique to insert
Enter in pipeline, it is consistent with flue gas flow direction.NOx flue gases measuring probe 5 is connected with the pipeline of the first measuring cylinder 5 using flange, flange
Disk size is consistent with probe mounting flange size.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, although ginseng
The utility model is described in detail according to previous embodiment, for those skilled in the art, it still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic.It is all
Within the spirit and principles of the utility model, any modification, equivalent substitution and improvements made etc., this practicality should be included in
Within new protection domain.
Claims (8)
1. a kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system, it is characterised in that including back-blowing device
And first measuring cylinder, several second measuring cylinders and Duo Gen probe tubes in sampling flue, the blowback dress
Put and be connected with first measuring cylinder, one end of the close back-blowing device of first measuring cylinder and second measuring cylinder
One end in be equipped with NOx flue gas measuring probes, the first measuring cylinder is remote described in all second measuring cylinder parallel communications
One end provided with the NOx flue gases measuring probe, the remote of the second measuring cylinder described in several described probe tube parallel communications set
There is one end of the NOx flue gases measuring probe, the probe tube is provided with multiple thief holes met to flue gas flow direction, the thief hole
It is distributed in the cigarette field of the sampling flue in mesh point.
2. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 1, its feature exist
In the NOx flue gases measuring probe is respectively oblique in 5 degree of angles with the pipeline in first measuring cylinder and second measuring cylinder
Into insertion first measuring cylinder and second measuring cylinder.
3. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 1 or 2, its feature
It is, the NOx flue gases measuring probe is externally provided with ceramic protective sleeve pipe.
4. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 3, its feature exist
In the end in the close measurement site in the gap between the ceramic protective sleeve pipe and the NOx flue gases measuring probe, which is provided with, prevents
The filter screen that only dust is dropped in the ceramic protective sleeve pipe.
5. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 1, its feature exist
In the number of the thief hole is 24-36.
6. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 1, its feature exist
In the probe tube is welded on by angle steel or stainless steel tube in the side wall of the sampling flue, with the sampling flue welding
The solder side of the probe tube be provided with projection.
7. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 6, its feature exist
In the projection is interior to be provided with groove.
8. power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system according to claim 1, its feature exist
In first measuring cylinder is provided with the suction pump for exhausting close to one end of the back-blowing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721277437.5U CN207197590U (en) | 2017-09-30 | 2017-09-30 | A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721277437.5U CN207197590U (en) | 2017-09-30 | 2017-09-30 | A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system |
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| Publication Number | Publication Date |
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| CN207197590U true CN207197590U (en) | 2018-04-06 |
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ID=61787939
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| CN201721277437.5U Expired - Fee Related CN207197590U (en) | 2017-09-30 | 2017-09-30 | A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414300A (en) * | 2018-05-30 | 2018-08-17 | 上海云鱼智能科技有限公司 | Differential flow measures the gas analyzing apparatus synchronous with extraction |
| CN110987547A (en) * | 2019-12-17 | 2020-04-10 | 广州中电荔新电力实业有限公司 | Flue gas monitoring system of flue denitration export |
| CN113567203A (en) * | 2021-07-28 | 2021-10-29 | 国能濮阳热电有限公司 | Flue gas measuring device |
| CN118243462A (en) * | 2024-05-28 | 2024-06-25 | 山东创宇能源科技股份有限公司 | Nitrogen oxide monitoring instrument suitable for complex environment |
-
2017
- 2017-09-30 CN CN201721277437.5U patent/CN207197590U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414300A (en) * | 2018-05-30 | 2018-08-17 | 上海云鱼智能科技有限公司 | Differential flow measures the gas analyzing apparatus synchronous with extraction |
| CN110987547A (en) * | 2019-12-17 | 2020-04-10 | 广州中电荔新电力实业有限公司 | Flue gas monitoring system of flue denitration export |
| CN113567203A (en) * | 2021-07-28 | 2021-10-29 | 国能濮阳热电有限公司 | Flue gas measuring device |
| CN113567203B (en) * | 2021-07-28 | 2024-03-05 | 国能濮阳热电有限公司 | Flue gas measuring device |
| CN118243462A (en) * | 2024-05-28 | 2024-06-25 | 山东创宇能源科技股份有限公司 | Nitrogen oxide monitoring instrument suitable for complex environment |
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