CN205941111U - A multiple spot equidistance flue gas sample thief for vertical gas pass - Google Patents
A multiple spot equidistance flue gas sample thief for vertical gas pass Download PDFInfo
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- CN205941111U CN205941111U CN201620988989.6U CN201620988989U CN205941111U CN 205941111 U CN205941111 U CN 205941111U CN 201620988989 U CN201620988989 U CN 201620988989U CN 205941111 U CN205941111 U CN 205941111U
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Abstract
The utility model provides a multiple spot equidistance flue gas sample thief for vertical gas pass. It is the sample thief monomer of installation on flue width direction is followed to a plurality of and feeds through each sample thief monomer to the gas collection pipeline of sample gas blender that the CEMS probe inserts sample gas blender extraction flue gas, and sample connection evenly distributed is in the flue cross -section, and every sample connection is connected to the blender through gas collection pipeline equidistance. The utility model discloses can accomplish really that the sample is even, can ensure coal fired boiler denitration smoke detection's accuracy and reliability to simple structure, easy installation is safeguarded, strong adaptability supports big flue to use, does not safe in utilizationly reveal.
Description
Technical field
The utility model is related to a kind of flue gas sampling device for boiler technology field, and especially one kind is used for vertical cigarette
The equidistant flue gas sampler of multiple spot in road.
Background technology
Thermal power plant abbreviation thermal power plant, be by the use of coal, oil, natural gas as fuel production electric energy factory, it
The basic process of production is：Combustion heating water makes into steam to fuel in the boiler, and the chemical energy of fuel is transformed into heat energy, vapour pressure
Power pushing turbine rotates, and heat energy is converted into mechanical energy, and then steam turbine drives generator rotation, and mechanical energy is transformed into electricity
Energy.
In high-temp combustion, itrogenous organic substance is oxidized to generate nitrogen oxides (NOx) to fuel in boiler, and severe contamination is big
Compression ring border.For meet the requirement of environmental protection, reduce nitrogen oxides in effluent (NOx) content that boiler is discharged, need to carry out at denitration
Reason.Catalysts selective reduction gas denitrifying technology (SCR) is using vertical catalyst reaction tower and anhydrous ammonia, from coal-fired combustion
Burn and in device (boiler) and the flue gas of coal-burning power plant, remove nitrogen oxides (NOx).Flue gas after denitration passes through cigarette after over sampling
Gas automatic monitored control system (CEMS) comes continuous analysis measurement NOx content, automatically controlling and environment monitoring for denitrating system.
In order that taken fume sample is representative, all recommend in international and national standard to adopt total cross-section gridding method,
The cross section of flue is divided into many equal cellar areas, and takes fume sample from the center of these cellar areas, will adopt
The oxygen collecting delivers to CEMS measurement after being sufficiently mixed.In order to flue gas is extracted out from flue relevant position, testing crew master
To adopt following three kinds of methods：(1) by multitube combined smoke sampling rifle, flue gas is extracted out；(2) pass through fluted shape cast flue gas
Flue gas is extracted out by sampling gun；(3) by way of single stainless steel tube pointwise plug, flue gas is extracted out.
Multitube combined smoke sampling rifle be by many diameters are identical, length stainless steel tube not etc. combine, it is not
Rust steel pipe stretches into the length of flue and uiform section grid element center corresponds.Fluted shape cast smoke sampling rifle be one have some
The stainless steel tube of equal diameter aperture, its position of opening is alignd with uiform section grid element center.According to hydrodynamics correlation theory, adopt
The each point rate of air sucked in required of fluted shape cast and multitube combined smoke sampling rifle with along journey distance dependent, longer along journey distance, extraction
Exhaust gas volumn is fewer, and therefore, the fume sample representativeness being extracted using first two method is not good enough.Single stainless steel tube pointwise plug
Although mode can ensure the exhaust gas volumn uniformity of each sample point, can take a substantial amount of time and manpower in test process,
And many unsafe factors can be brought in swapping process repeatedly.
Content of the invention
In order to overcome the above-mentioned deficiency of prior art, the utility model provides a kind of equidistant cigarette of multiple spot for vertical gas pass
Gas sampling, this flue gas sampler be equidistant, etc. resistance, the flow sampling such as realize, sampling can be truly realized uniformly, can protect
Barrier denitration flue gas inspection accuracy and reliability, and structure is simple, easily installs and safeguards, strong adaptability, supports that large flue makes
With not revealed using safety.
The utility model solves its technical problem and employed technical scheme comprise that：Pacify along along flue width including several
The sampler monomer of dress and the gas collection pipe that each sampler monomer is communicated to sample gas blender, CEMS probe insertion sample gas mixes
Clutch extracts flue gas, and described sampler monomer includes the one-level sampling pipe of two horizontal direction arrangements, a horizontal direction cloth
The two grades of sampling pipes put and a sampling escape pipe tilting upward, one-level sampling pipe and two grades of sampling pipes are respectively provided with three ends
Mouthful, its upper port connects two lower port being symmetrically distributed in upper port both sides obliquely, and the lower port of one-level sampling pipe is to adopt
Sample mouth, the lower port of two grades of sampling pipes is respectively communicated with the upper port of one-level sampling pipe, and the upper port of two grades of sampling pipes connects again
One sampling escape pipe, sampler monomer is located in flue after installing and is uniformly distributed in flue cross section, one-level sampling pipe, two
The length of level sampling pipe and sampling escape pipe is corresponding with the uiform section grid element center of flue；Described gas collection pipe includes multistage collection
Tracheae, often by an one-level discharge connection, the two ends of one-level discharge are respectively connecting to two to equidistant two sampler monomers
The upper port of the sampling escape pipe of individual sampler monomer, each two one-level discharge is communicated to one further through two grades of discharges
Rise, the two ends of two grades of discharges are respectively connecting to the middle part of two one-level discharges, and by that analogy, each two is with one-level discharge
Middle part be connected to the two ends of an one-level discharge higher than it again, the middle part of final step discharge is passed through one and is sampled
House steward connects to sample gas blender, and the therefore series of discharge is adapted with sampler monomer populations, sampler monomer
Quantity is 2n, wherein n is the series of discharge, and n >=1.
Compare existing flue gas sampling device, a kind of equidistant flue gas sampling of the multiple spot for vertical gas pass of the present utility model
Device, is also the total cross-section gridding method adopting, and the cross section of flue is divided into many equal cellar areas, and from these elemental areas
Long-pending center takes fume sample, delivers to CEMS measurement, because the utility model is every after the flue gas collecting is sufficiently mixed
The distance of individual sample tap to sample gas blender is equal, and the resistance of ducting is identical, in line with the principle of uiform section, uniform flow, thus
Ensure that the flue gas flow that each sample point extracts is basically identical, be truly realized sampling uniformly, ensured denitration flue gas inspection
Accuracy and reliability, and the utility model structure is simple, easily installs and safeguards, strong adaptability, supports that large flue uses,
Do not revealed using safety.
Brief description
With reference to the accompanying drawings and examples the utility model is further illustrated.
Fig. 1 is the structural representation of the utility model one embodiment.
Fig. 2 is the structural representation of sampler monomer in the utility model one embodiment.
In figure, 1, flue, 2, sampler monomer, 3, gate valve, 4, one-level discharge, 5, two grades of discharges, 6, three-level gas collection
Pipe, 7, regulating valve, 8, sample gas blender, 9, blow down valve II, 10, sampling house steward, 11, purging isolating valve, 12, blow down valve I, 13,
Thief hatch, 14, one-level sampling pipe, 15, two grades of sampling pipes, 16, sampling escape pipe.
Specific embodiment
Purpose, technical scheme and advantage for making the utility model embodiment are clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described it is clear that being retouched to the technical scheme in the utility model embodiment
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all belong to
In protection domain of the present utility model.
Figures 1 and 2 show that the structural representation of one preferred embodiment of the utility model, one of figure is used for hanging down
The equidistant flue gas sampler of multiple spot of straight flue, include 8 installations along along flue 1 width sampler monomers 2 and by each
Sampler monomer 2 is communicated to the gas collection pipe of sample gas blender 8, and CEMS probe insertion sample gas blender 8 extracts flue gas.From Fig. 2
In visible, described sampler monomer 2 includes 14, horizontal direction arrangement of one-level sampling pipe of two horizontal directions arrangement
Two grades of sampling pipes 15 and a sampling escape pipe 16 tilting upward, one-level sampling pipe 14 and two grades of sampling pipes 15 are respectively provided with three
Port, its upper port connects two lower port being symmetrically distributed in upper port both sides, the lower port of one-level sampling pipe 14 obliquely
For thief hatch 13, the lower port of two grades of sampling pipes 15 is respectively communicated with the upper port of one-level sampling pipe 14, two grades of sampling pipes 15
Upper port connects a sampling escape pipe 16 again, and sampler monomer 2 is located in flue 1 and uniform on flue 1 section after installing
Distribution, 14, two grades of sampling pipes 15 of one-level sampling pipe are relative with the uiform section grid element center of flue 1 with the length of sampling escape pipe 16
Should.Referring to Fig. 1, described gas collection pipe includes 4, two grades of discharges 5 of one-level discharge and three-level discharge 6, often adopts for equidistant two
Sample device monomer 2 is connected by an one-level discharge 4, and the two ends of one-level discharge 4 are respectively connecting to two sampler monomers 2
The upper port of sampling escape pipe 16, each two one-level discharge 4 is communicated to together further through two grades of discharges 5, two grades of collection
The two ends of tracheae 5 are respectively connecting to the middle part of two one-level discharges 4, and then two grades of discharges 5 of each two are further through one three
Level discharge 6 is communicated to together, and the two ends of three-level discharge 6 are respectively connecting to the middle part of two two grades of discharges 4, last three-level
The middle part of discharge 6 is connected to sample gas blender 8 by a sampling house steward 10, but is not limited to this specific embodiment,
The series of discharge of the present utility model is adapted with sampler monomer 2 sum, and the quantity of sampler monomer 2 is 2n, its
Middle n is then the series of discharge, and n >=1 to be met.In order to be more convenient for connecting, the sampling escape pipe of described sampler monomer 2
16 can be connected by mouthpiece and bend pipe at walling of flue with gas collection pipe.
In boiler flow out flue gas contain a certain amount of dust, flue gas sampler in use for some time, in pipeline
Can remain, if cleaning can block sample lines and the accuracy of impact measurement not in time, in order to realize the clear of dust in equipment
Except function, also include a scavenging pipeline, scavenging pipeline is connected to the sampling house steward 10 between sample gas blender 8 and sampler
On, scavenging pipeline is connected with compressed air line, connects from one upper branch road of compressed air line and connects after a blow down valve I 12
To sampling house steward 10, connect from another lower branch road of compressed air line and be also connected to, after a blow down valve II 9, the house steward 10 that samples,
Purging isolating valve 11 is provided with the sampling house steward 10 between upper branch road and lower branch road.
Scavenging pipeline can be cleared up to sampler and sample gas blender 8 respectively：When not cleaned, upper branch road
The blow down valve II 9 of blow down valve I 12 and lower branch road is normally closed, and the purging isolating valve 11 on sample gas blender 8 front end pipeline is normally opened；
When needing sampler to be carried out clean dedusting, the purging isolating valve 11 before manual-lock sample gas blender 8, then open purging
The blow down valve I 12 being connected with compressed air line in branch road on pipeline, the dust that can complete sampler by compressed air is clear
Sweep work, after the completion of a period of time purges, manual-lock blow down valve I 12, open the purging isolating valve 11 before sample gas blender 8 with
And the blow down valve II 9 of lower branch road；When needing to clear up to sample gas blender 8 and towards the pipeline of negative pressure flue, close manually
Close the purging isolating valve 11 of sample gas blender 8 front end, open the blow down valve II 9 in lower branch road, and, you can toward sample gas blender
It is passed through the cleaning that compressed air carries out dust in 8.
In order to purge respectively to single sampler monomer 2, remove the dust retaining in it.Can each institute
Gate valve 3 is mounted on the pipeline that the sampler monomer 2 stated is connected with gas collection pipe, gate valve 3 is located at outside walling of flue.Gate valve
3 is normally opened, according to using needing, selection closing can be carried out one by one or the alternative of several sampler monomer 2 cleans.
In terms of dedusting and avoiding dust accumulation, also some design following：In order to prevent substantial amounts of dust in flue gas from blocking up
The sample tap of plug sampler, hangs in the thief hatch 13 of described sampler monomer 2 lower end and is provided with chain, chain can be passed through
Fixation with steel wire, can also adopt other any conventional fixed forms, and chain produces with vibrations when equipment runs and swings,
Chain continuously clashes into the inwall of thief hatch 13, can effectively dedusting and avoid dust gather；Furthermore, when mounted, position can be made
Inside and outside flue 1, pipeline, all using tilting trend, can make the dust stratification in pipeline flow to flue 1 or flue gas blender.
Generally, the regulating valve 7 (this regulating valve 7 is normally opened) of the end of flue gas blender is controlled can to adjust sample gas in embodiment
Flow, with SCR rear pass flue gas flow rate as reference, accomplish isokinetic sampling；The end pipeline of flue gas blender is communicated to one
The bigger flue of negative pressure, by flue negative pressure to drive flue gas to produce flowing, attracts sampling flue gas flow direction flue gas blender.Work as institute
Valve (purging isolating valve 11 above and regulation below when being all provided with valve before and after stating flue gas blender, before and after closing
Valve 7) it is easy to the maintenance of analysis meter (such as CEMS).
The above, be only preferred embodiment of the present utility model, and not the utility model is done with any pro forma limit
System, every according to technical spirit of the present utility model, to simple modification any done by above example and equal change, all fall
Enter within protection domain of the present utility model.
Claims (5)
1. a kind of equidistant flue gas sampler of the multiple spot for vertical gas pass, installs along along flue (1) width including several
Sampler monomer (2) and the gas collection pipe that each sampler monomer (2) is communicated to sample gas blender (8), CEMS probe insert
Enter sample gas blender (8) and extract flue gas, it is characterized in that：
Described sampler monomer (2) includes the one-level sampling pipe (14) of two horizontal direction arrangements, a horizontal direction arrangement
Two grades of sampling pipes (15) and a sampling escape pipe (16) tilting upward, one-level sampling pipe (14) and two grades of sampling pipes (15)
It is respectively provided with three ports, upper port connects two lower port being symmetrically distributed in upper port both sides, one-level sampling pipe obliquely
(14) lower port is thief hatch (13), and the lower port of two grades of sampling pipes (15) is respectively communicated with the upper end of one-level sampling pipe (14)
Mouthful, the upper port of two grades of sampling pipes (15) connects sampling escape pipe (16) again, and sampler monomer (2) is located at flue after installing
(1) it is uniformly distributed in and on flue (1) section, one-level sampling pipe (14), two grades of sampling pipes (15) and sampling escape pipe (16)
Length corresponding with the uiform section grid element center of flue (1)；
Described gas collection pipe includes multistage discharge, and often equidistant two sampler monomers (2) pass through an one-level discharge (4) even
Logical, the two ends of one-level discharge (4) are respectively connecting to the upper port of the sampling escape pipe (16) of two sampler monomers (2), often
Two one-level discharges (4) are communicated to together further through one two grades discharges (5), and the two ends of two grades of discharges (5) connect respectively
It is connected to the middle part of two one-level discharges (4), by that analogy, each two is connected to the middle part of one-level discharge (4) again
The two ends of one one-level discharge (4) higher than it, the middle part of final step discharge (4) is connected by sampling house steward (10)
To sample gas blender (8), the therefore series of discharge is adapted with sampler monomer (2) sum, sampler monomer (2)
Quantity is 2n, wherein n is the series of discharge, and n >=1.
2. a kind of equidistant flue gas sampler of multiple spot for vertical gas pass according to claim 1, is characterized in that：Also include
One scavenging pipeline, scavenging pipeline is connected on sampling house steward (10) and sampler between for sample gas blender (8), scavenging pipeline
Connect with compressed air line, connect a blow down valve I (12) from one upper branch road of compressed air line and to sampling always connect afterwards
Pipe (10), connects from another lower branch road of compressed air line and is also connected to the house steward (10) that samples after a blow down valve II (9),
Sampling house steward (10) between upper branch road and lower branch road is provided with purging isolating valve (11).
3. a kind of equidistant flue gas sampler of multiple spot for vertical gas pass according to claim 1 and 2, is characterized in that：?
It is mounted on gate valve (3), gate valve (3) is located at cigarette on the pipeline that each described sampler monomer (2) is connected with gas collection pipe
Outside road wall.
4. a kind of equidistant flue gas sampler of multiple spot for vertical gas pass according to claim 1 and 2, is characterized in that：?
Hang in the thief hatch (13) of described sampler monomer (2) lower end and be provided with chain.
5. a kind of equidistant flue gas sampler of multiple spot for vertical gas pass according to claim 1 and 2, is characterized in that：Institute
State one negative pressure flue of end pipeline communication of sample gas blender (8), be provided with and negative pressure flue between in sample gas blender (8)
Regulating valve (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620988989.6U CN205941111U (en) | 2016-08-30 | 2016-08-30 | A multiple spot equidistance flue gas sample thief for vertical gas pass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620988989.6U CN205941111U (en) | 2016-08-30 | 2016-08-30 | A multiple spot equidistance flue gas sample thief for vertical gas pass |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106872223A (en) * | 2017-02-27 | 2017-06-20 | 广州森瑟机电设备有限公司 | A kind of flue gas monitoring system multidraw method |
| CN107421790A (en) * | 2017-09-12 | 2017-12-01 | 南京友智科技有限公司 | A kind of more dot matrix mixing sampling apparatuses of gaseous contaminant and its method for sampling and blowback maintaining method |
| CN108007731A (en) * | 2018-01-16 | 2018-05-08 | 国电环境保护研究院有限公司 | A kind of gas fired-boiler smoke sampling system and smoke sampling method |
| CN109556928A (en) * | 2018-11-30 | 2019-04-02 | 国网山东省电力公司电力科学研究院 | A kind of fly ash sampling device and its operating method and its calibration measuring method |
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| CN110044661A (en) * | 2019-05-13 | 2019-07-23 | 国家电投集团电站运营技术（北京）有限公司 | A kind of measuring system and method monitoring boiler back end ductwork total cross-section CO concentration |
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- 2016-08-30 CN CN201620988989.6U patent/CN205941111U/en active Active
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| CN106872223A (en) * | 2017-02-27 | 2017-06-20 | 广州森瑟机电设备有限公司 | A kind of flue gas monitoring system multidraw method |
| CN106872223B (en) * | 2017-02-27 | 2019-04-23 | 广州森瑟机电设备有限公司 | A kind of flue gas monitoring system multidraw method |
| CN107421790A (en) * | 2017-09-12 | 2017-12-01 | 南京友智科技有限公司 | A kind of more dot matrix mixing sampling apparatuses of gaseous contaminant and its method for sampling and blowback maintaining method |
| CN107421790B (en) * | 2017-09-12 | 2023-11-03 | 南京友智科技有限公司 | Gaseous pollutant multi-point matrix mixed sampling device, sampling method thereof and blowback maintenance method |
| CN108007731A (en) * | 2018-01-16 | 2018-05-08 | 国电环境保护研究院有限公司 | A kind of gas fired-boiler smoke sampling system and smoke sampling method |
| CN108007731B (en) * | 2018-01-16 | 2024-03-22 | 国电环境保护研究院有限公司 | Gas boiler flue gas sampling system and flue gas sampling method |
| CN109556928A (en) * | 2018-11-30 | 2019-04-02 | 国网山东省电力公司电力科学研究院 | A kind of fly ash sampling device and its operating method and its calibration measuring method |
| CN109556928B (en) * | 2018-11-30 | 2022-03-18 | 国网山东省电力公司电力科学研究院 | Fly ash sampling device, operation method thereof and calibration measurement method thereof |
| CN109765078A (en) * | 2019-03-20 | 2019-05-17 | 爱文思控制系统工程(上海)有限公司 | One kind is across tank body sampling probe |
| CN109765078B (en) * | 2019-03-20 | 2024-03-22 | 爱文思控制系统工程(上海)有限公司 | Sampling probe crossing tank body |
| CN110044661A (en) * | 2019-05-13 | 2019-07-23 | 国家电投集团电站运营技术（北京）有限公司 | A kind of measuring system and method monitoring boiler back end ductwork total cross-section CO concentration |
| CN111381005A (en) * | 2020-03-20 | 2020-07-07 | 施令 | Combustion waste gas emission concentration detection device capable of adjusting coverage surface |
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