CN207649968U - A kind of flue gas sampling device - Google Patents
A kind of flue gas sampling device Download PDFInfo
- Publication number
- CN207649968U CN207649968U CN201721546593.7U CN201721546593U CN207649968U CN 207649968 U CN207649968 U CN 207649968U CN 201721546593 U CN201721546593 U CN 201721546593U CN 207649968 U CN207649968 U CN 207649968U
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- China
- Prior art keywords
- sampling
- pipe
- flue gas
- mouth
- flue
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 168
- 239000003546 flue gas Substances 0.000 title claims abstract description 64
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000000779 smoke Substances 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000005553 drilling Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 230000002411 adverse Effects 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 8
- 238000007664 blowing Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 206010022000 influenza Diseases 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model is related to the flue gas inspection field of coal-burning boiler, especially a kind of flue gas sampling device, the sampler is used for smoke on-line monitoring system, monitors the smoke pollution emission status of boiler of power plant.Average pollutant concentration problem cannot be represented greatly for flue gas source deviation is sampled existing for existing flue gas sampling device, the utility model provides a kind of flue gas sampling device, it includes the sampling pipe being set in flue cavity, the sampling pipe one terminates suction device and smoke on-line monitoring system air inlet pipe, multiple sampling mouths with trepanning are set along its length on sampling pipe, the sampling mouth is connected with sampling pipe, and sampling mouth self-priming leading-in device one end becomes larger to other end trepanning section.The utility model changes sampling mouth trepanning size, improved by open pore size Long-term change trend because apart from the weak adverse effect to flue gas soakage of remote attraction, the uniformity for promoting all sampling mouth drawing smokes, makes the mixed flue gas representativeness of sample finally acquired enhance.
Description
Technical field
The utility model is related to the flue gas inspection field of coal-burning boiler, especially a kind of flue gas sampling device, the sampling
Device is used for smoke on-line monitoring system, monitors the smoke pollution emission status of boiler of power plant.
Background technology
Thermal power generation is still China's currently main generation mode, to realize that environment protection emission, in-service coal unit can add mostly
The SCR flue gas denitrification systems that selective catalytic reduction (SCR) technique does denitration design are filled with, the nitrogen oxygen in combustion product gases is removed
Compound prevents environmental pollution caused by flue gas emission.The inlet and outlet of denitrating system is respectively mounted smoke on-line monitoring system（Letter
Claim CEMS）, the monitoring system is provided with the flue gas sampling device with several sample points in flue cross section, these sampled points
Uniform representativeness directly to determine that can smoke on-line monitoring system accurately measure pollutant concentration in flue gas horizontal, together
When performance automatically controlled to the spray ammonia in denitrating system also have a major impact.
The conventional structure of existing flue gas sampling device is as shown in Figure 1, be included in the sampling pipe 2 arranged in flue cavity 1, institute
It states 2 upper edge pipe range of sampling pipe and welds multiple sampling mouths 5 with trepanning, sampling pipe is conveyed to flue gas after sampling mouth sucking flue gas and exists
Line monitoring system air inlet pipe（Do not show in figure）, smoke components progress of the smoke on-line monitoring system according to the sampling of input to acquisition
Monitoring.This sampling apparatus has the following defects：The pollutant in flue gas is sucked when sampling near the walling of flue of side,
The average pollutant concentration of whole flue gases, which cannot be represented in entire flue cavity, can influence denitrating system normal work, and when work adopts
Sample pipe one terminates suction device and the flue gas of sampled mouth sucking different location is sent into smoke on-line monitoring system air inlet pipe, due to
Sampling mouth on-way resistance along sampling pipe welding is different, and the sampling mouth nearest from side walling of flue is small close to suction device, resistance,
Flue gas flow maximum is sucked, and close to the sampling mouth of flue center line and more distal end because leading to inside and outside differential pressure far from suction device
Small, also air inflow is zero to air inflow under very little or even extreme case, when contaminant component concentration field changes in flue, sucking
The flue gas of sampling pipe is near the walling of flue of side.In addition, sampling pipe blowback cleaning is not thorough, flue approximate centerline is adopted
Sample mouth easily blocks and data deviation when measurement is made to increase, and influencing denitrating system makes denitration spray ammonia Control platform deteriorate, clear in blowback
Enter compressed air to clear up unimpeded sampling mouth, to being blown into compressed air side close to walling of flue from main pipe to sampling pipe blowback when reason
Neighbouring edge sample mouth cleaning effect is good, and air supply obviously becomes smaller when being blown to distal end, the sampling mouth cleaning of corresponding position
Effect is poor, and sampling mouth has been used long to block, and causes measurement data that cannot really reflect that the flue gas pollutant concentration that be averaged is horizontal.
Utility model content
The technical problems to be solved in the utility model and the technical assignment of proposition are that existing flue gas sampling device is overcome to exist
Sampling flue gas source deviation cannot represent average pollutant concentration problem greatly, a kind of flue gas sampling device, the flue gas are provided
Sampling apparatus can uniformly acquire flue cavity flue gas, improve average pollutant concentration measurement accuracy；Further, moreover it is possible to solve
Certainly blowback cleaning is not thorough problem to fractional-sample mouth effect difference, and thorough cleaning can be carried out to all sampling mouths when blowback is cleared up
Unimpeded, avoiding sampling mouth from blocking influences follow-up flue gas sampling work.
The utility model solves the technical solution that technical problem uses：A kind of flue gas sampling device, including be set in flue
Sampling pipe in chamber, the sampling pipe one terminate suction device and smoke on-line monitoring system air inlet pipe, its length of sampling pipe upper edge
Multiple sampling mouths with trepanning are arranged in degree direction, and the sampling mouth is connected with sampling pipe, it is characterized in that the sampling mouth self-priming
Leading-in device one end becomes larger to other end trepanning section.The utility model changes sampling mouth trepanning size, passes through trepanning hole
Diameter Long-term change trend improves because apart from the weak adverse effect to flue gas soakage of remote attraction, promotes all sampling mouth drawing smokes
Uniformity, make the mixed flue gas representativeness of sample finally acquired enhance.When work, due to the sampling apart from suction device distal end
Mouth trepanning is more than sample near-end mouth trepanning, and more exhaust gas volumns can be being sucked using large opening apart from suction device distal end, away from
From suction device proximal end using small trepanning limitation sucking exhaust gas volumn, realization can proximally and distally suck difference apart from suction device not
More exhaust gas volumns makes sampling pipe uniformly acquire whole flue gases in flue cavity section, to contaminant component concentration field in flue
Variation detection accuracy greatly improves, and effectively works conducive to denitrating system.
As further improving and supplementing to above-mentioned technical proposal, the utility model uses following technical measures：It is described
Sampling pipe has more and side by side parallel is set to same working face, and homonymy one end of more sampling pipes is connected in same common end and is followed by mother
Pipe, the other end of more sampling pipe homonymies are connected in same common end and are followed by suction device and smoke on-line monitoring system air inlet pipe.
By the way that the sampling pipe of more side by side parallel is arranged on same working face, it is equal further to promote flue cavity cross section flue gas sampling
Even property, with flue gas corresponds to contaminant density field variation everywhere in wider scope measurement flue cavity；More sampling pipe homonymy one end
It is connected to main pipe, effect is to clear up the unimpeded sampling mouth for having used long to whole sampling pipe blowing compressed airs from main pipe in cleaning；It is more
Another termination suction device of homonymy and smoke on-line monitoring system air inlet pipe of root sampling pipe, effect are to suck flue gas in sampling
And it is sent to smoke on-line monitoring system air inlet pipe.
The more sampling pipes connect the public termination main pipe of suction device.Original due to sampling pipe connects suction device side
Common end also connect main pipe so that the both ends of sampling pipe are all docked with main pipe, are blown from the both ends of sampling pipe to centre when cleaning
Raising sampling mouth cleaning effect, specific air blowing, which may be used both ends while blow or successively blow and alternately blow, waits various ways work
Make, there was only a termination main pipe blowing compressed air to eliminate original sampling pipe, distance air blowing side proximal end cleaning effect is good, and distal end is cleared up
The defect of effect difference.
Be uniformly arranged along its length on the sampling pipe it is several connection sampling tube cavities branch pipes, described branch pipe one end with adopt
Sample pipe is fixed, and the other end is detachably connected with sampling mouth.Sampling mouth with branch pipe by being detachably connected and with branch tube transitions
Sampling pipe is connected, sampling mouth is enable very easily to be replaced and be adjusted, it can be according to the specific operating mode of different flues in use
The sampling mouth of different trepannings is replaced in row's branch pipe adjustment on sampling pipe, realizes flue gas sampling evenly；Detachable
Sampling mouth also allows for producing and making unified specification in batches, and sampling mouth shape unanimously only has trepanning of different sizes.
The sampling mouth and branch pipe one end are threaded connection or clamping or grafting.Spiral shell may be used between sampling mouth and branch pipe
Line connects or the common connection structure such as clamping or grafting, improves attaching/detaching convenience.
The sampling mouth is nut, and the trepanning is perforative drilling on nut, and boring aperture is in 2~5cm, the branch pipe
The external screw thread that one end is equipped with and nut matches.When sampling mouth and branch pipe is threadedly coupled, it can drill to work as directly on nut and adopt
Sample mouth is used, and branch pipe one end sets matching external screw thread, is produced convenient for batch machining, the trepanning changed from 2~5cm（The hole of drilling
Diameter）The appropriate sampling flue gas needs of sucking can be met.
The branch length of tube is in 12~16cm, and branch bore is in 3~6cm.Branch length of tube and inside diameter ranges meet sampling
It needs, branch pipe is long or the too short flue gas that can all cause the acquisition of different branch pipes interferes with each other, and causes sampling representativeness poor；In branch pipe
Diameter size can influence smoke collecting flow velocity, and wherein branch bore is big, and smoke collecting flow velocity is small to cause flue dust to be deposited in branch pipe,
Branch bore is small, and smoke collecting flow velocity is big, big to suction device power requirement, and the branch pipe of the inside diameter ranges can ensure that suitably
Smoke collecting flow velocity reduces dust deposition and reduces to suction device power requirement.
0.5~the 1.5m of branch interval is uniformly arranged on sampling pipe.Branch pipe on sampling pipe is in the distance interval
It is uniformly distributed, the sampling needs of uniform collection flue gas can be met.
The utility model changes sampling mouth trepanning size, is improved by varying aperture because weak to flue gas apart from remote attraction
The adverse effect of soakage promotes the uniformity of sampling mouth drawing smoke, and the mixed flue gas representativeness of sample finally acquired is made to increase
By force.
Description of the drawings
Fig. 1：Existing flue gas sampling device structural schematic diagram.
Fig. 2：Flue gas sampling device structural schematic diagram described in the utility model.
Fig. 3：Trepanning schematic diagram on sampling mouth described in the utility model.
In figure：1. flue cavity, 2. sampling pipes, 3. suction devices, 4. smoke on-line monitoring system air inlet pipe, 5. samplings
Mouth, 6. main pipes, 7. branch pipes, 8. trepannings.
Specific implementation mode
Explanation and specific implementation mode are described further the utility model below in conjunction with the accompanying drawings.
As shown in figures 2-3, a kind of flue gas sampling device includes the sampling pipe 2 in flue cavity 1 to the utility model,
The sampling pipe 2 one terminates suction device 3 and smoke on-line monitoring system air inlet pipe 4, is arranged along its length on sampling pipe 2
Multiple sampling mouths 5 with trepanning 8, the sampling mouth 5 are connected with sampling pipe 2,5 self-priming leading-in device of the sampling mouth, 3 one end to
Other end trepanning section becomes larger.When work, since the sampling mouth trepanning apart from suction device distal end is more than sample near-end mouth
Trepanning is sucking more exhaust gas volumns using large opening apart from suction device distal end, small trepanning is being utilized apart from suction device proximal end
Limitation sucking exhaust gas volumn, much the same exhaust gas volumn can proximally and distally be sucked apart from suction device by realizing, sampling pipe is to flue
Whole flue gases of intracavity section uniformly acquire, and are greatly improved to contaminant component concentration field variation detection accuracy in flue, profit
It effectively works in denitrating system.The utility model changes sampling mouth trepanning size, is improved by varying aperture because being inhaled apart from remote
The weak adverse effect to flue gas soakage of gravitation promotes the uniformity of sampling mouth drawing smoke, makes the mixed flue gas finally acquired
Representativeness of sample enhances.
The sampling pipe 2 has more and side by side parallel is set to same working face, and homonymy one end of more sampling pipes 2 is connected in together
One common end is followed by main pipe 6, and the other ends of more 2 homonymies of sampling pipe is connected in that same common end is followed by suction device 3 and flue gas exists
Line monitoring system air inlet pipe 4 and main pipe 6.The sampling pipe of more side by side parallel is set on same working face, can further be carried
Flue cavity cross section flue gas sampling uniformity is risen, with flue gas corresponds to pollutant concentration everywhere in wider scope measurement flue cavity
Field variation；More sampling pipe homonymy one end are connected to main pipe, and effect is to be blown into compressed air from main pipe to sampling pipe in cleaning, clearly
Manage the unimpeded sampling mouth for having used long；Another termination suction device of homonymy and smoke on-line monitoring system air inlet pipe of more sampling pipes
And main pipe, flue gas is sucked by suction device when sampling and is sent to smoke on-line monitoring system air inlet pipe, simultaneously because sampling pipe
Both ends all connect main pipe, and when cleaning can blow from the both ends of sampling pipe to centre improves sampling mouth cleaning effect, and specific blow can
Using both ends while equal various ways work is blown or successively blowing and alternately blow, to eliminate original sampling pipe one end blow pressure contracting sky
Gas, distance air blowing side proximal end cleaning effect is good, the defect of distal end cleaning effect difference.
The branch pipe 7 of 2 inner cavity of several connection sampling pipes, 7 one end of the branch pipe are uniformly arranged on the sampling pipe 2 along its length
It is fixed with sampling pipe 2, the other end is detachably connected with sampling mouth 5.It is preferably threadedly coupled in the present embodiment, sampling mouth 5 is spiral shell
Cap, the trepanning 8 are perforative drilling on nut, and in 2~5cm, 7 one end of the branch pipe is equipped with and nut matching boring aperture
External screw thread.In addition, clamping or grafting and other constructions for facilitating assembly and disassembly can also be used between sampling mouth and branch pipe.Sample mouth
By being detachably connected with branch pipe and connect sampling pipe with branch tube transitions, enable sampling mouth very easily carry out replacing and
Adjustment, in use branch pipe can one end to be fixedly welded on sampling pipe, then according to the specific operating mode of different flues in row's branch pipe
The sampling mouth of different trepannings is replaced in adjustment, realizes flue gas sampling evenly；It is raw that detachable sampling mouth also allows for batch
Unified specification is produced and makes, sampling mouth shape unanimously only has trepanning of different sizes；Boring aperture can root on nut in the present embodiment
The factually branch pipe quantity of border pipeline section setting adjusts drilling from range minimum-value aperture 2cm to maximum diameter of hole 5cm
It is whole, with meet uniformly sample flue gas needs, sample mouth on boring aperture from away from suction device it is distal-to-proximal have from greatly to
Small variation tendency.
The branch pipe 7 is spaced 0.5~1.5m and is uniformly arranged on sampling pipe 2, and 7 length of branch pipe is in 12~16cm, and branch pipe 7
Internal diameter is in 3~6cm.Branch pipe preferred length is 15cm and is spaced 1m and is welded and fixed on sampling pipe in the present embodiment, and branch bore is
The branch pipe of 5cm, the length can meet sampling needs, and different branch pipe acquisition flue gases will not interfere with each other, and sampling representativeness is good；Together
When the internal diameter branch pipe can ensure that suitable smoke collecting flow velocity, reducing dust deposition simultaneously reduces to suction device power requirement；
The branch pipe that interval 1m is welded and fixed disclosure satisfy that sampling needs.It, can be according to flue size in aforementioned dimensions model in actual use
Enclose interior confirmation branch tube spacing, length and internal diameter.
Claims (8)
1. a kind of flue gas sampling device, including it is set to flue cavity（1）In sampling pipe（2）, the sampling pipe（2）One termination is inhaled
Leading-in device（3）With smoke on-line monitoring system air inlet pipe（4）, sampling pipe（2）On multiple band trepannings are set along its length（8）
Sampling mouth（5）, the sampling mouth（5）With sampling pipe（2）It is connected, it is characterized in that the sampling mouth（5）Self-priming leading-in device（3）
One end becomes larger to other end trepanning section.
2. a kind of flue gas sampling device according to claim 1, it is characterized in that the sampling pipe（2）There are more and puts down side by side
Row is set to same working face, more sampling pipes（2）Homonymy one end be connected in same common end and be followed by main pipe（6）, more sampling pipes
（2）The other end of homonymy is connected in same common end and is followed by suction device（3）With smoke on-line monitoring system air inlet pipe（4）.
3. a kind of flue gas sampling device according to claim 2, it is characterized in that the more sampling pipes（2）Connect suction device
（3）Public termination main pipe（6）.
4. a kind of flue gas sampling device according to claim 1, it is characterized in that the sampling pipe（2）On it is uniformly distributed along its length
Several connection sampling pipes are set（2）The branch pipe of inner cavity（7）, the branch pipe（7）One end and sampling pipe（2）It is fixed, the other end with adopt
Sample mouth（5）It is detachably connected.
5. a kind of flue gas sampling device according to claim 4, it is characterized in that the sampling mouth（5）And branch pipe（7）One end
To be threadedly coupled or being clamped or grafting.
6. a kind of flue gas sampling device according to claim 5, it is characterized in that the sampling mouth（5）It is described to open for nut
Hole（8）For perforative drilling on nut, boring aperture is in 2~5cm, the branch pipe（7）The outer spiral shell that one end is equipped with and nut matches
Line.
7. a kind of flue gas sampling device according to claim 4, it is characterized in that the branch pipe（7）Length in 12~16cm,
And branch pipe（7）Internal diameter is in 3~6cm.
8. a kind of flue gas sampling device according to claim 4, it is characterized in that the branch pipe（7）It is equal to be spaced 0.5~1.5m
Cloth is set to sampling pipe（2）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721546593.7U CN207649968U (en) | 2017-11-17 | 2017-11-17 | A kind of flue gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721546593.7U CN207649968U (en) | 2017-11-17 | 2017-11-17 | A kind of flue gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207649968U true CN207649968U (en) | 2018-07-24 |
Family
ID=62889225
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721546593.7U Expired - Fee Related CN207649968U (en) | 2017-11-17 | 2017-11-17 | A kind of flue gas sampling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN207649968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655729A (en) * | 2017-11-17 | 2018-02-02 | 浙江浙能温州发电有限公司 | A kind of flue gas sampling device |
-
2017
- 2017-11-17 CN CN201721546593.7U patent/CN207649968U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655729A (en) * | 2017-11-17 | 2018-02-02 | 浙江浙能温州发电有限公司 | A kind of flue gas sampling device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 |
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| CF01 | Termination of patent right due to non-payment of annual fee |