CN205958319U - A multiple spot equidistance flue gas sample thief for horizontal gas pass - Google Patents
A multiple spot equidistance flue gas sample thief for horizontal gas pass Download PDFInfo
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- CN205958319U CN205958319U CN201621022930.8U CN201621022930U CN205958319U CN 205958319 U CN205958319 U CN 205958319U CN 201621022930 U CN201621022930 U CN 201621022930U CN 205958319 U CN205958319 U CN 205958319U
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Abstract
The utility model provides a multiple spot equidistance flue gas sample thief for horizontal gas pass, includes that a plurality of goes up the sample thief monomer of installation and feed through each sample thief monomer to the gas collection pipeline of blender along flue width direction, and the CEMS probe inserts blender extraction flue gas, has the sample connection on the sample thief monomer, 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 horizontal 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 horizontal flue
Gas sampling, this flue gas sampler be equidistant, etc. resistance, the flow sampling such as realize, sampling can be truly realized uniformly, can protect
The accuracy of barrier denitration flue gas inspection and reliability, and structure is simple, easily installs and safeguards, strong adaptability, supports large flue
Use, do 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 blender, CEMS probe insertion blender extracts
Flue gas, described sampler monomer includes two vertical sampling pipes and a vertical sampling escape pipe, two vertical adopting
Sample pipe is isometric and has thief hatch at the two ends of sampling pipe, and sampling pipe is symmetrically distributed in the lower section both sides of sampling escape pipe, sampling
The lower port of escape pipe is communicated to the middle part of sampling pipe by two connecting tubes, sampler monomer be located at after installing in flue and
It is uniformly distributed in flue cross section, the length of sampling pipe and sampling escape pipe is corresponding with the uiform section grid element center of flue；Described
Gas collection pipe includes multistage discharge, and often equidistant two sampler monomers pass through an one-level discharge connection, one-level discharge
Two ends be respectively connecting to two sampler monomers sampling escape pipe upper port, each two one-level discharge is further through one
Two grades of discharges are communicated to together, and the two ends of two grades of discharges are respectively connecting to the middle part of two one-level discharges, by that analogy,
Each two is connected to the two ends of an one-level discharge higher than it, final step discharge with the middle part of one-level discharge again
Middle part by one sampling house steward connect to blender, the series of therefore discharge is to be adapted with sampler monomer populations
, the quantity of sampler monomer 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 horizontal flue 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 blender is equal, and the resistance of ducting is identical, in line with the principle of uiform section, uniform flow, thus ensureing
The flue gas flow that each sample point extracts is basically identical, has been truly realized sampling uniformly, has ensured the standard of denitration flue gas inspection
Really property and reliability, and the utility model structure is simple, easily installs and safeguards, strong adaptability, supports that large flue uses, is not required to
Repeatedly to plug, not revealed using safety, long service life.
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, flash vessel, 4, one-level discharge, 5, blender, 6, regulating valve, 7, blow
Sweep valve II, 8, blow down valve I, 9, purging isolating valve, 10, sampling house steward, 11, two grades of discharges, 12, mounting flange, 13, isolating valve
Door, 14, sampling pipe, 15, connecting tube, 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 Fig. 1 is used for
The equidistant flue gas sampler of multiple spot of horizontal flue, the sampler monomer 2 installed along along flue 1 width including several and general
Each sampler monomer 2 is communicated to the gas collection pipe of blender 5, and CEMS probe insertion blender 5 extracts flue gas.Sampler monomer
2 are vertically mounted on above flue 1, and sample tap has essential choke preventing function, will not be blocked by the dust in flue gas.Referring to Fig. 2, institute
The sampler monomer 2 stated includes two vertical sampling pipes 14 and a vertical sampling escape pipe 16, two vertical samplings
Pipe 14 is isometric and has thief hatch at the two ends of sampling pipe 14, and sampling pipe 14 is symmetrically distributed in the lower section two of sampling escape pipe 16
Side, the lower port of sampling escape pipe 16 passes through the middle part that two connecting tubes 15 are communicated to sampling pipe 14, after sampler monomer 2 is installed
It is uniformly distributed in flue 1 and on flue 1 section, the length of sampling pipe 14 and sampling escape pipe 16 is cut with the grade of flue 1
Surface grids center is corresponding；Gas collection pipe described in Fig. 1 includes multistage discharge, and often equidistant two sampler monomers 2 pass through one
Individual one-level discharge 4 connects, and the two ends of one-level discharge 4 are respectively connecting to the sampling escape pipe 16 of two sampler monomers 2
Upper port, each two one-level discharge 4 is communicated to together further through two grades of discharges 11, and the two ends of two grades of discharges 11 are divided
Do not connect to the middle part of two one-level discharges 4, by that analogy, the middle part of two grades of discharges 11 of each two is connected to one again
The two ends of individual three-level discharge, next always each two with the middle part of one-level discharge be connected to again one higher by one than it
The two ends of level discharge, the middle part of the discharge of final step is connected to blender 5, therefore gas collection by a sampling house steward 10
The series of pipe is adapted with sampler monomer 2 sum, and the quantity of sampler monomer 2 is usually 2n, wherein n is discharge
Series, and n >=1；Fig. 1 gives the example of a two-stage discharge, and its sampler monomer 2 selects 4, therefore this collector
There are two one-level discharges 4 and two grades of discharges 11, often equidistant two sampler monomers 2 pass through an one-level discharge
4 connections, 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, each two
One-level discharge 4 is communicated to together further through two grades of discharges 11, and the two ends of two grades of discharges 11 are respectively connecting to two
The middle part of one-level discharge 4, the middle part of last two grades of discharges 11 is connected to blender 5 further through sampling house steward 10.
It is that described sampler monomer 2 also includes a flash vessel 3, dilatation as further improvement of this embodiment design
Device 3 is arranged on sampling escape pipe 16 near the position of upper port.One dilatation cavity at sampler monomer 2 middle part is to make flue gas
Slow down through here, make most dust settlings in flue 1, can prevent soot build-up from affecting flow in pipeline 4.
In embodiment, an isolation can be respectively mounted in each described sampler monomer 2 and the junction of gas collection pipe
Valve 13, separation valve door 13 is located at outside walling of flue.The separation valve door 13 herein arranging is normally opened, and its effect is can be to list
Individual sampler monomer 2 is purged, and removes the dust retaining in it.
Further improving is, is provided with peace on described sampler monomer 2 at its sampling escape pipe 16 upper port
Dress flange 12, sampler monomer 2 is passed through mounting flange 12 and is connected with walling of flue.Mounting flange 12 can ensure installation fixing and
No leakage.
Generally, in embodiment, the regulating valve 6 (regulating valve 6 is normally opened) of control blender 5 end can adjust the stream of sample gas
Amount, with SCR rear pass flue gas flow rate as reference, accomplishes isokinetic sampling；Blender one negative pressure flue of 5 end pipeline communication, mixes
The end pipeline of clutch 5 leads to the bigger negative pressure flue of negative pressure, attracts sampling flue gas flow direction blender 5 by flue negative pressure, with
Flue gas is driven to produce flowing.When being all provided with valve before and after described blender 5, the valve (blow down valve above before and after closing
Door 9 and regulating valve 6 below are easy to the maintenance of analysis meter (such as CEMS).
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 on the sampling house steward 10 between blender 5 and sampler, blows
Sweep pipeline to connect with compressed air line, connect from one upper branch road of compressed air line and connect to sampling after a blow down valve I 8
House steward 10, connect from another lower branch road of compressed air line and are also connected to, after a blow down valve II 7, the house steward 10 that samples, at upper
Sampling house steward 10 between road and lower branch road is provided with purging isolating valve 9.
Scavenging pipeline can be cleared up to sampler and blender 5 respectively：When not cleaned, the purging of upper branch road
The blow down valve II 7 of valve I 8 and lower branch road is normally closed, and the purging isolating valve 9 on blender 5 front end pipeline is normally opened；When needing to adopting
Sample device carry out clean dedusting when, before manual-lock blender 5 purging isolating valve 9 and lower branch road blow down valve II 7, for protecting
CMES pops one's head in, and then opens the blow down valve I 8 being connected with compressed air line in branch road on scavenging pipeline, by compressed air is
The dust cleaning work of sampler can be completed, after the completion of a period of time purges, manual-lock blow down valve I 8, before opening blender 5
Purging isolating valve 9 and lower branch road blow down valve II 7；When need to blender 5 and lead to negative pressure flue pipeline carry out clearly
During reason, blow down valve II 7 in branch road under manual unlocking, and the purging isolating valve 9 of manual-lock blender 5 front end, you can past
It is passed through the cleaning that compressed air carries out dust in blender 5.
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 (6)
1. a kind of equidistant flue gas sampler of the multiple spot for horizontal flue, installs along along flue (1) width including several
Sampler monomer (2) and the gas collection pipe that each sampler monomer (2) is communicated to blender (5), CEMS probe insertion is mixed
Clutch (5) extracts flue gas, it is characterized in that：
Described sampler monomer (2) two vertical sampling pipes (14) of inclusion and a vertical sampling escape pipe (16), two
The vertical sampling pipe of root (14) is isometric and has thief hatch at the two ends of sampling pipe (14), and sampling pipe (14) is symmetrically distributed in sampling
The lower section both sides of escape pipe (16), the lower port of sampling escape pipe (16) is communicated to sampling pipe (14) by two connecting tubes (15)
Middle part, sampler monomer (2) install after be located at flue (1) in and be uniformly distributed on flue (1) section, sampling pipe (14) and
The length of sampling escape pipe (16) is 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 (11), and the two ends of two grades of discharges (11) are respectively
Connect to the middle part of two one-level discharges (4), by that analogy, each two is connected to one with the middle part of one-level discharge again
The two ends of individual one-level discharge higher than it, the middle part of final step discharge is connected to blender by sampling house steward (10)
(5), therefore the series of discharge is adapted with sampler monomer (2) sum, and the quantity of sampler monomer (2) is 2n, its
Middle n is the series of discharge, and n >=1.
2. a kind of equidistant flue gas sampler of multiple spot for horizontal flue according to claim 1, is characterized in that：Described adopt
Sample device monomer (2) also includes a flash vessel (3), and flash vessel (3) is arranged on the upper position near upper port of sampling escape pipe (16)
Put.
3. a kind of equidistant flue gas sampler of multiple spot for horizontal flue according to claim 1 and 2, is characterized in that：?
Each described sampler monomer (2) is mounted on separation valve door (13), separation valve door (13) position with the junction of gas collection pipe
Outside walling of flue.
4. a kind of equidistant flue gas sampler of multiple spot for horizontal flue according to claim 1 and 2, is characterized in that：?
Described sampler monomer (2) is upper to be fixedly provided with mounting flange (12), sampler list at its sampling escape pipe (16) upper port
Body (2) is passed through mounting flange (12) and is connected with walling of flue.
5. a kind of equidistant flue gas sampler of multiple spot for horizontal flue according to claim 1, is characterized in that：Described mixed
Negative pressure flue of the end pipeline communication of clutch (5), is provided with regulating valve (6) in blender (5) and negative pressure flue between.
6. the equidistant flue gas sampler of a kind of multiple spot for horizontal flue according to claim 1 or 2 or 5, is characterized in that：
Also include a scavenging pipeline, scavenging pipeline is connected on sampling house steward (10) and sampler between for the blender (5), scavenging conduit
Road is connected with compressed air line, connects a blow down valve I (8) from one upper branch road of compressed air line and to sampling always connects 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 (7),
Sampling house steward (10) between upper branch road and lower branch road is provided with purging isolating valve (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621022930.8U CN205958319U (en) | 2016-08-30 | 2016-08-30 | A multiple spot equidistance flue gas sample thief for horizontal gas pass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621022930.8U CN205958319U (en) | 2016-08-30 | 2016-08-30 | A multiple spot equidistance flue gas sample thief for horizontal gas pass |
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Cited By (8)
| 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 |
| CN107966334A (en) * | 2018-01-16 | 2018-04-27 | 国电环境保护研究院 | A kind of fire coal boiler fume sampling system and sampling method |
| CN107991148A (en) * | 2018-01-03 | 2018-05-04 | 南京益彩环境科技股份有限公司 | Foldable flue gas sampling device and flue system |
| CN110132663A (en) * | 2019-04-29 | 2019-08-16 | 国网浙江省电力有限公司电力科学研究院 | A kind of smoke sampling auxiliary device suitable for high temperature positive flue |
| CN111610069A (en) * | 2020-06-08 | 2020-09-01 | 浙江浙能技术研究院有限公司 | Sample gas collection system and method for coal-fired unit denitration CEMS |
| CN114992665A (en) * | 2022-05-25 | 2022-09-02 | 宜兴市宏业保温工程有限公司 | Power station boiler temperature dust monitoring equipment and monitoring method thereof |
| CN117298861A (en) * | 2023-11-30 | 2023-12-29 | 中建材环保研究院（江苏）有限公司 | High-temperature high-dust SCR denitration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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 |
| CN107991148A (en) * | 2018-01-03 | 2018-05-04 | 南京益彩环境科技股份有限公司 | Foldable flue gas sampling device and flue system |
| CN107966334A (en) * | 2018-01-16 | 2018-04-27 | 国电环境保护研究院 | A kind of fire coal boiler fume sampling system and sampling method |
| CN107966334B (en) * | 2018-01-16 | 2024-03-22 | 国电环境保护研究院有限公司 | Flue gas sampling system and sampling method for coal-fired boiler |
| CN110132663A (en) * | 2019-04-29 | 2019-08-16 | 国网浙江省电力有限公司电力科学研究院 | A kind of smoke sampling auxiliary device suitable for high temperature positive flue |
| CN110132663B (en) * | 2019-04-29 | 2024-02-09 | 国网浙江省电力有限公司电力科学研究院 | Flue gas sampling auxiliary device suitable for high Wen Zhengya flue |
| CN111610069A (en) * | 2020-06-08 | 2020-09-01 | 浙江浙能技术研究院有限公司 | Sample gas collection system and method for coal-fired unit denitration CEMS |
| CN114992665A (en) * | 2022-05-25 | 2022-09-02 | 宜兴市宏业保温工程有限公司 | Power station boiler temperature dust monitoring equipment and monitoring method thereof |
| CN114992665B (en) * | 2022-05-25 | 2023-08-11 | 宜兴市宏业保温工程有限公司 | Power station boiler temperature dust monitoring equipment and monitoring method thereof |
| CN117298861A (en) * | 2023-11-30 | 2023-12-29 | 中建材环保研究院（江苏）有限公司 | High-temperature high-dust SCR denitration system |
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