CN105628454B - A kind of smoke components measuring device of Non-uniform Currents - Google Patents
A kind of smoke components measuring device of Non-uniform Currents Download PDFInfo
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- CN105628454B CN105628454B CN201610079912.1A CN201610079912A CN105628454B CN 105628454 B CN105628454 B CN 105628454B CN 201610079912 A CN201610079912 A CN 201610079912A CN 105628454 B CN105628454 B CN 105628454B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/26—Devices for withdrawing samples in the gaseous state with provision for intake from several spaces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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Abstract
The present invention provides a kind of smoke components measuring device of Non-uniform Currents, is installed on the flue connector that interior flow field is Non-uniform Currents；Include: be set to the flue connector inlet and exit at least two sets of sampling lines；The sampling line includes: a main line；It is evenly arranged in more branch pipelines being connected in the inlet of the flue connector or a cross section in exit with the main line；The multiple sampling holes being distributed in aforementioned cross-sectional are offered in the more branch pipelines；The main line connects a smoke components and collects measuring unit.It can be realized the precise measurement in Non-uniform Currents to smoke components.
Description
Technical field
The present invention relates to smoke components field of measuring technique, and in particular to a kind of smoke components measurement dress of Non-uniform Currents
It sets.
Background technique
Measurement for coal steam-electric plant smoke ingredient, mainly for the pollutant (SO2, NOx etc.) in flue gas, oxygen amount, moisture
And unreacted ammonia of denitration etc..The state that puts into operation of thermal power plant's environmental protection facility, need to be according to the on-line measurement knot of above-mentioned smoke components
Fruit is adjusted in real time, to reach optimal discharge control level.Control with China to Air Pollutant Emission level
It is increasingly stringenter, the measurement of smoke components is just gradually taken seriously.
Currently, as power plant units scale is increasing, flue cross section is gradually increased, it is sometimes desirable to irregularly, no
Uniform flue gas flow field ingredient measures, and existing smoke components on-line measurement means have been unable to satisfy current use and have wanted
It asks.There are some disadvantages for existing smoke components on-line measurement means, comprising: point layout protrudes into cigarette only close to flue side
Sampling part inside road is too short, is unable to measure the smoke components of flue center and opposite side, does not have representativeness；Measuring point is very little,
The actual value of entire flue cross section is often replaced with the measurement result of one or two of measuring point so that test data with point position at
Smoke components fluctuation and fluctuate, cause the big ups and downs of the inaccuracy and test result of test result；It is unable to satisfy
Irregularly, unevenly the measurement request of flue gas flow field ingredient, measurement result and actual value deviation are larger.
Summary of the invention
For deficiency existing for existing online smoke components measurement means, the object of the present invention is to provide a kind of non-uniform flows
The smoke components measuring device of field, can be realized the precise measurement in Non-uniform Currents to smoke components.
In order to achieve the above objectives, the present invention, which sets the specific technical solution taken, is:
A kind of Non-uniform Currents smoke components measuring device is installed on the flue that interior flow field is Non-uniform Currents and connects
Part；Include:
Be set to the flue connector inlet and exit at least two sets of sampling lines；The sampling line
It include: a main line；It is evenly arranged in the inlet of the flue connector or a cross section in exit and the supervisor
More branch pipelines of road connection；The multiple sampling holes being distributed in aforementioned cross-sectional are offered in the more branch pipelines；
The main line connects a smoke components and collects measuring unit.
Further, the flue connector is selected from changes of section pipe connections, angle change pipe connections and pipe quantity
Change connector.
Further, the opening direction of the sampling hole is consistent with flue gas flow direction in the flue connector.
Further, the multiple sampling hole array is uniformly distributed or annular is distributed in the cross section.
Further, the area of section of the inlet or exit of the flue connector is more than or equal to 0.3 ㎡.
Further, the smoke components collect content of the measuring unit to measure pollutant in flue connector.
Further, the branch pipeline is cross-section pipe, and the proportionate relationship between the opening area of each sampling hole is full
Foot: the flue gas flow rate in each sampling hole is identical.
Further, the branch pipeline is ladder pipe, and the quantity of the sampling hole including being arranged in any branch pipeline is corresponding
More piece pipeline section, the proportionate relationship respectively saved between the area of section of pipeline section meet: the flue gas stream in the cross section in each sampling hole
Speed is identical.
Further, the cross section of the inlet or exit of the flue connector is rectangle, the sampling hole array
It is distributed in the cross section, the cross section is divided into the rectangle of multiple homalographics corresponding with the sampling hole number and position
Region, the area of the rectangular area are 0.08-1.0 ㎡.
Further, the cross section of the inlet or exit of the flue connector is circle, the sampling hole annular
It is distributed in the cross section, the cross section is divided into the annular of multiple homalographics corresponding with the sampling hole number and position
Or fan-shaped region, annular or fan-shaped region the area is 0.1-1.57 ㎡.
By taking above-mentioned technical proposal, the invention has the following advantages:
(1) it is designed by using more branch pipelines, is provided with multiple sampling holes in every branch pipeline, can accomplish to flue
The all standing of connector cross section, area covering degree are increased substantially compared with the prior art.
(2) non-homogeneous flue gas flow field can accurately be measured.Flue gas passes through sampling hole, sampling line, summarizes and flows into flue connection
The smoke components arranged outside part collect measuring unit, and the measurement result of smoke components is the average result of more sampling holes, i.e., entirely
Average result on cross section, and above-mentioned average result is average in real time, rather than (mathematic(al) mean is i.e. it is believed that multiple for mathematic(al) mean
One measuring point is measured, is finally again averaged multiple measurement results；Or it is measured respectively using same measuring device
After multiple measuring points, then multiple measurement results are averaged.Due in flue flue gas flow rate be not it is uniform, smoke distribution is also
Real-time change is very likely to will lead to measurement result inaccuracy in this way) effectively prevent smoke components fluctuation at spot sample hole
The fluctuation of measurement result caused by and, measurement result are more accurate, more representative.Measuring sampling line can be according to non-homogeneous flue gas
The flexible form in flow field arranges there is good section adaptability, and sampling line and sampling hole can cut irregular flue gas flow field
Face is completely covered, and can accurately be measured entire non-homogeneous flue gas flow field section；
(3) whole device is convenient to process and mount, adaptable.In engineer application, it can be adjusted flexibly according to the actual situation
The arrangement quantity of sampling hole, probe tube, the method that subregion arrangement can also be used are adaptable.
Detailed description of the invention
Fig. 1 is the sampling in the Non-uniform Currents smoke components measuring device in one embodiment of the invention in a cross section
The arrangement schematic diagram of pipeline.
Fig. 2 is the structural schematic diagram of the branch pipeline of the cross-section form of tubes in one embodiment of the invention.
Fig. 3 is the structural schematic diagram of the branch pipeline of the ladder tubular formula in another embodiment of the present invention.
Fig. 4 is the arrangement schematic diagram of the Non-uniform Currents smoke components measuring device in one embodiment of the invention.
Fig. 5 is the arrangement schematic diagram of the Non-uniform Currents smoke components measuring device in further embodiment of this invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.Cooperation institute's attached drawing elaborates to the features and advantages of the present invention below.
In conjunction with Fig. 1, in an embodiment, a kind of Non-uniform Currents smoke components measuring device is provided, interior flow field is installed on
For the flue connector 01 of Non-uniform Currents；Include:
Be set to flue connector 01 inlet and exit at least two sets of sampling lines 02；Sampling line 02 wraps
It includes: a main line；It is evenly arranged in and is connected to main line in the inlet of flue connector 01 or a cross section in exit
More branch pipelines；The multiple sampling holes 03 being distributed in aforementioned cross-sectional are offered in more branch pipelines；Main line connects flue gas
Component collection measuring unit 04.Smoke components collect content of the measuring unit 04 to measure various pollutants in flue gas, are mesh
Preceding known instruments, such as fume component analysis instrument can choose its dimension in practical applications according to different flow.It has
Body structure and function is known by those skilled in the art, and in the Practical Project for measuring, analyzing to smoke components at present
Middle extensive use, details are not described herein.
Specifically, flue connector is selected from changes of section pipe connections, reducer union 07 for example, as shown in figure 4, day circle
Place etc.；Angle change pipe connections, such as elbow 08 as shown in Figure 5；Pipe quantity changes connector (not shown), such as three
Pass joint, at this point, the quantity of sampling line is identical as the interface quantity of connector, that is to say, that three-way connection is then arranged three and extracts
Sample pipeline.
The opening direction of sampling hole 3 is consistent with flue gas flow direction in flue connector.That is, sampling hole is backwards to flue gas
Carry out flow arrangement, sampling hole plug can be prevented.
In sampling line 02, especially branch pipeline can take two kinds of forms of cross-section pipe or ladder pipe according to actual needs.
For example, section is rectangle, circle or the class of rule as shown in Fig. 2, in some embodiments, branch pipeline 05 is cross-section pipe
It is round.When opening up sampling hole 03, guarantee that the proportionate relationship between the opening area of each sampling hole 03 meets: each sampling hole 03
Interior flue gas flow rate is identical.The exhaust gas volumn into each sampling hole 03 can be made to be consistent.
In another example as shown in figure 3, in another embodiment, branch pipeline 06 is to be arranged on ladder pipe, including any branch pipeline
Sampling hole 03 the corresponding more piece pipeline section of quantity, the proportionate relationship between each area of section for saving pipeline section meets: the branch pipeline
On each sampling hole 03 in flue gas flow rate it is identical, be consistent the exhaust gas volumn into each sampling hole 03.
Device when in use, summarize and flow into smoke components collection measuring unit 04 by the sampled hole 03 of flue gas, sampling line 02
Carry out analysis measurement.The measurement result of smoke components is the real-time average result of more sampling holes, i.e., being averaged on entire cross section
As a result, effectively prevent at spot sample hole smoke components fluctuation and caused by measurement result fluctuate, measurement result is more accurate,
It is more representative.
When the inlet of flue connector or the cross section in exit are rectangle, sampling hole array is distributed in cross section,
Cross section is divided into the rectangular area of multiple homalographics corresponding with sampling hole number and position, and the area of the rectangular area is
0.08-1.0㎡.And the inlet of flue connector or the cross section in exit are circle, sampling hole annular is distributed in cross section
Interior, cross section is divided into the annular or fan-shaped region, the annular or sector of multiple homalographics corresponding with sampling hole number and position
The area in region is 0.1-1.57 ㎡.
It samples bore dia and quantity, sampling pipe diameter and quantity, probe tube arrangement can be according to numerical simulation result, object
Mould test result and on-site actual situations are chosen.
Specific arrangement specification of the sampling hole in flue connector is as follows:
1) rectangular or square section
Cross section is divided into an appropriate number of homalographic region, using the center in each region as measuring point.It arranges and takes at measuring point
Sample hole.The quantity in homalographic region is chosen by table 1, and general measuring point is no more than 20.
| Flue connector area of section m2 | Homalographic region long side length m | Measuring point sum |
| 0.5~1.0 | <0.50 | 4~6 |
| 1.0~4.0 | <0.67 | 6~9 |
| 4.0~9.0 | <0.75 | 9~16 |
| >9.0 | ≤1.0 | ≤20 |
The homalographic region specification and measuring point number of 1 square of table (side) shape flue
2) circular cross-section
Cross section is divided into an appropriate number of homalographic annular concentric or fan-shaped region, each measuring point is selected in each homalographic center
On the intersection point of line and two straight lines of perpendicular intersection, wherein a diameter line should change in maximum plane in expected concentration.
The projected position in sampling hole or corresponding sample hole is arranged at measuring point.The circular cross-section homalographic number of rings of different-diameter, measurement are straight
Diameter number and measuring point number are shown in Table 2, and general measuring point is no more than 20.
| Flue connector diameter m | Homalographic number of regions | Measure diameter number | Measuring point number |
| 0.3~0.6 | 1~2 | 1~2 | 2~8 |
| 0.6~1.0 | 2~3 | 1~2 | 4~12 |
| 1.0~2.0 | 3~4 | 1~2 | 6~16 |
| 2.0~4.0 | 4~5 | 1~2 | 8~20 |
| >4.0 | 5 | 1~2 | 10~20 |
2 circular flue of table divides ring and measuring point number
It should be noted that the flue connector of the types such as hemispherical dome being mentioned above, while area of section and shape occurs
The variation of shape, the arrangement of sampling line and sampling hole at entrance and exit are pressed related specification above and are chosen.
Lower mask body combination practical measuring examples are illustrated the service condition of the device of the invention:
Specific practical measuring examples 1: measurement straightens runoff field smoke components.
In practical engineering applications, many occasion needs measure the smoke components for straightening runoff field, however flue gas
It is flowed in variable diameter region, can be due to the change of diameter, flow velocity changes suddenly, and generates stronger turbulent flow and disturbance, cigarette
The mobility status of gas is sufficiently complex in variable diameter region, and the smoke components measurement result of variable diameter region different location has significant area
Not.
Common measurement method is only arranged that single measuring point carries out smoke components measurement in variable diameter region upstream and downstream section, is surveyed
Measure that result fluctuation is big, and single measuring point can not represent the measurement result in whole cross section, can not know flue gas whole on section at
Divide distribution situation.
Using two sets of sampling lines in non-homogeneous flue gas flow field component measuring device of the present invention, connected in variable diameter
The runoff field upstream and downstream that straightens that part 07 is formed is respectively arranged, and arrangement is as shown in Figure 4.The sampling arranged on sampling line
Hole can will straighten runoff field section and completely cover, and sampling is uniform.Sampling flue gas summarizes entrance by sampling hole, sampling line
Smoke components collect measuring unit 04, and gained measurement result is the average value for entirely straightening runoff field section, have evaded using single
One measuring point and the measurement result fluctuation that generates is big, sampling does not have multiple problems such as representativeness.
It is illustrated below with specific data.Certain smoke pollution processing unit, locating region are variable diameters flue gas flow field,
Flue gas flow rate changes greatly in the variable diameters flue gas flow field, and has stronger turbulent flow and disturbance.It imports and exports and is arranged in the flow field
Single measuring point, measures the operational effect of the smoke pollution processing unit, and the following table 3 is measurement result.From measurement result as can be seen that
When using single measuring point, outlet pollutant concentration variation fluctuation is larger, and measurement result cannot keep stabilization, can not react flue gas dirt
Contaminate the true operational effect of processing unit.Reason is to straighten in runoff field, and smoke components, the variation of flow of flue gas situation are acutely, single
One measuring point is highly prone to influence, and measurement result is unstable.
The single measuring point measurement result of table 3
Non-homogeneous flue gas flow field component measuring device of the present invention is arranged to the flow field inlet port and outlet, measurement should
The operational effect of smoke pollution processing unit, the following table 4 are measurement result.From measurement result as can be seen that using described in invention
Non-homogeneous flue gas flow field component measuring device can effectively evade smoke components and the fluctuation of flow of flue gas situation in Non-uniform Currents
Influence to measurement result, measurement result is relatively stable, can accurately reflect the true smoke components of flow field inlet and outlet, have stronger
Stability and accuracy.
The non-homogeneous flue gas flow field component measuring device measurement result of the present invention of table 4
Specific practical measuring examples 2: measurement elbow flow field smoke components.
In practical engineering applications, many occasions need the smoke components to elbow flow field to measure, however flue gas exists
Flowing in elbow will form stronger turbulent flow and disturbance, the mobility status of flue gas is in elbow since flow direction changes suddenly
Sufficiently complex, the smoke components measurement result of elbow different location has significant difference.
Common measurement method only arranges that single measuring point carries out smoke components measurement, measurement knot in elbow upstream and downstream section
Fruit fluctuation is big, and single measuring point can not represent the measurement result in whole cross section, can not know smoke components whole on section point
Cloth situation.
Using non-homogeneous flue gas flow field component measuring device of the present invention, in elbow flow field, upstream and downstream is respectively arranged,
Arrangement is as shown in Figure 5.The sampling hole arranged on sampling line can completely cover in elbow flow field section, and sampling is equal
It is even.Sampling flue gas, which summarizes by sampling hole, sampling line into smoke components, collects measuring unit, and gained measurement result is entire
The average value in elbow flow field section has been evaded the measurement result generated using single measuring point and has fluctuated big, sampling without representative
Multiple problems such as property.
It is illustrated below with specific data.Certain smoke pollution processing unit, locating region are elbow flue gas flow field, cigarette
Gas velocity changes greatly in the elbow flue gas flow field, and has stronger turbulent flow and disturbance.It is single in flow field inlet and outlet setting
Measuring point, measures the operational effect of the smoke pollution processing unit, and the following table 5 is measurement result.From measurement result as can be seen that using
When single measuring point, outlet pollutant concentration variation fluctuation is larger, and measurement result cannot keep stabilization, can not react at smoke pollution
Manage the true operational effect of device.Reason is in elbow flow field, and smoke components, the variation of flow of flue gas situation are violent, single measuring point
It is highly prone to influence, measurement result is unstable.
The single measuring point measurement result of table 5
Non-homogeneous flue gas flow field component measuring device of the present invention is arranged to the flow field inlet port and outlet, measurement should
The operational effect of smoke pollution processing unit, the following table 6 are measurement result.From measurement result as can be seen that using described in invention
Non-homogeneous flue gas flow field component measuring device can effectively evade smoke components and the fluctuation pair of flow of flue gas situation in elbow flow field
The influence of measurement result, measurement result is relatively stable, can accurately reflect the true smoke components of flow field inlet and outlet, has stronger steady
Qualitative and accuracy.
The non-homogeneous flue gas flow field component measuring device measurement result of the present invention of table 6
Using non-homogeneous flue gas flow field component measuring device of the present invention, non-homogeneous flue gas flow field can be accurately measured
Ingredient, avoid flow field unevenly to the influence of measurement result, measuring device effectively covers entire flow field section, measurement result energy
Smoke components are enough represented in the distribution situation in entire flow field section.
Claims (5)
1. a kind of Non-uniform Currents smoke components measuring device is installed on the flue that interior flow field is Non-uniform Currents and connects
Part；It is characterised by comprising:
Be set to the flue connector inlet and exit at least two sets of sampling lines；The sampling line packet
It includes: a main line；It is evenly arranged in the inlet of the flue connector or a cross section in exit and the main line
More branch pipelines of connection；The multiple sampling holes being distributed in aforementioned cross-sectional are offered in the more branch pipelines；It is described to take
The opening direction in sample hole is consistent with flue gas flow direction in the flue connector；The branch pipeline is ladder pipe, including any is in charge of
The corresponding more piece pipeline section of quantity of the sampling hole of road setting, the proportionate relationship respectively saved between the area of section of pipeline section meet: institute
The flue gas flow rate stated in cross section in each sampling hole is identical；
When the inlet of the flue connector or the cross section in exit are rectangle, the sampling hole array is distributed in the cross
In section, the cross section is divided into the rectangular area of multiple homalographics corresponding with the sampling hole number and position, the square
The area in shape region is 0.08-1.0m2；When the area of section of the flue is 0.5-1m2When, the quantity in the homalographic region
It is 4-6, the long side length of the rectangular area is less than 0.5m；When the area of section of the flue is 1-4m2When, the equal faces
The quantity in product region is 6-9, and the long side length of the rectangular area is less than 0.67m；When the area of section of the flue is 4-
9m2When, the quantity in the homalographic region is 9-16, and the long side length of the rectangular area is less than 0.75m；When the flue
Area of section be greater than 9m2When, the quantity in the homalographic region is no more than 20, and the long side length of the rectangular area is less than
Equal to 1.0m；
When the inlet of the flue connector or the cross section in exit are round, the sampling hole annular is distributed in the cross
In section, the cross section is divided into annular or the fan-shaped region of multiple homalographics corresponding with the sampling hole number and position,
The area of the annular or fan-shaped region is 0.1-1.57m2；When the diameter of the flue is 0.3-0.6m, annular or fan-shaped
The quantity in region is 1-2, and sampling hole number is 2-8；When the diameter of the flue is 0.6-1m, annular or fan-shaped region
Quantity be 2-3, sampling hole number is 4-12；When the diameter of the flue is 1-2m, the number of annular or fan-shaped region
Amount is 3-4, and sampling hole number is 6-16；When the diameter of the flue is 2-4m, the quantity of annular or fan-shaped region is
4-5, sampling hole number is 8-20；When the diameter of the flue is greater than 4m, the quantity of annular or fan-shaped region is 5,
Sampling hole number is 10-20；
The main line connects a smoke components and collects measuring unit.
2. Non-uniform Currents smoke components measuring device as described in claim 1, which is characterized in that the flue connector choosing
Change connector from changes of section pipe connections, angle change pipe connections and pipe quantity.
3. Non-uniform Currents smoke components measuring device as described in claim 1, which is characterized in that the multiple sampling hole battle array
Column are uniformly distributed or annular is distributed in the cross section.
4. Non-uniform Currents smoke components measuring device as described in claim 1, which is characterized in that the flue connector
The area of section in inlet or exit is more than or equal to 0.3m2。
5. Non-uniform Currents smoke components measuring device as described in claim 1, which is characterized in that the smoke components are collected
Content of the measuring unit to measure pollutant in flue connector.
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| CN201610079912.1A CN105628454B (en) | 2016-02-04 | 2016-02-04 | A kind of smoke components measuring device of Non-uniform Currents |
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| CN201610079912.1A CN105628454B (en) | 2016-02-04 | 2016-02-04 | A kind of smoke components measuring device of Non-uniform Currents |
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| CN107478469A (en) * | 2017-07-31 | 2017-12-15 | 南京圆点环境清洁技术有限公司 | A kind of waste gas collecting device |
| CN109855926A (en) * | 2019-03-26 | 2019-06-07 | 嘉兴求源检测技术有限公司 | A kind of smoke flue gas sampling instrument |
| CN109813854A (en) * | 2019-03-26 | 2019-05-28 | 嘉兴求源检测技术有限公司 | A kind of exhaust gas determination of moisture device |
| CN114432885A (en) * | 2021-12-24 | 2022-05-06 | 皖能铜陵发电有限公司 | Method for treating tail gas of coal-fired boiler |
| CN114432881A (en) * | 2021-12-24 | 2022-05-06 | 皖能铜陵发电有限公司 | Process for treating tail gas of coal-fired boiler |
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| CN201716219U (en) * | 2010-07-13 | 2011-01-19 | 山东电力研究院 | Smoke gas sampling pipe |
| CN103674631B (en) * | 2014-01-08 | 2016-05-04 | 国家电网公司 | Double pump current-sharing flue gas sampling device and sampling method |
| CN205562227U (en) * | 2016-02-04 | 2016-09-07 | 大唐环境产业集团股份有限公司 | Components of smoke measuring device of nonuniform flow field |
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