CN207456501U - Exhaust Measurement Equipment - Google Patents
Exhaust Measurement Equipment Download PDFInfo
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- CN207456501U CN207456501U CN201720983426.2U CN201720983426U CN207456501U CN 207456501 U CN207456501 U CN 207456501U CN 201720983426 U CN201720983426 U CN 201720983426U CN 207456501 U CN207456501 U CN 207456501U
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Abstract
The utility model is related to Exhaust Measurement Equipments, measuring device is the exhaust socket containing straight pipeline section, inside has been horizontally disposed with partition plate along airflow direction, exhaust socket is divided into more than two autonomous channels, each autonomous channel is internally provided with the monitoring section vertical with exhaust socket axial line, monitoring sample is provided on the monitoring section, is provided with monitoring holes at exhaust pipe drum outer wall on monitoring sample extension cord, the position of the monitoring section meets the following conditions：L=lBefore+lAfterwards；lBefore≥2D；lAfterwards≥0.5D；D is the equivalent diameter of each autonomous channel；L is the length of the straight pipeline section in each autonomous channel；lBeforeThe length of the straight pipeline section in upstream before monitoring section is flowed through for air-flow；lAfterwardsThe straight length of pipe section in the downstream after monitoring section is flowed through for air-flow.The measuring device can make straight pipeline section in exhaust pipe meet technology requirement, accurate measurements exhaust flow rate and/or flow, particulate matter and gaseous matter, and then accurately measure gas emissions.
Description
Technical field
The utility model is related to be vented detection field, and in particular to a kind of Exhaust Measurement Equipment.
Background technology
According to《Particulate matter measures and the gaseous pollutant method of sampling in 16157-1996 Concentration in Fixed Pollutants Source of GB/T》、
《The fixed pollution source smoke discharge continuous monitoring technical specifications of HJ/T75-2007》With《The waste gas in fixed source of HJ/T397-2007 is supervised
Survey technology specification》Requirement, the survey for gas discharge speed flow and particle concentration and gas species concentration in a organized way
The crucial key facility part of device is measured as straight socket, length and equivalent diameter and ratio to the straight socket channel section have
Three kinds of primary conditions, first, flow velocity of the gas at this should be typically no less than 5m/s, second is that measurement gas flow rate flow and particle
During object, gas flows through automatic monitoring section (monitoring sample) and the straight pipe before manual monitoring section (monitoring sample)
Cylinder passage segment length is four times to six times of length of its equivalent diameter, and the straight socket channel section after air-flow flows through is at least it
Two times of length to three times of equivalent diameter, referred to as " two, after preceding four " " three after the first six ", third, during measurement gaseous matter, similarly
Referred to as " the first two is later half ".To rectangular flue, equivalent D, D=2AB/ (A+B), A, B are the length of side in formula.
Under these conditions, gas just can guarantee not at vicinity before and after by monitoring section (monitoring sample)
Vortex/wadding stream/turbulence state is in, is vented along straight tube axis method and flows vertically through monitoring section (monitoring sample),
It just can guarantee held stationary state, i.e. current stabilization state when conveying is flowed in exhaust in the pipeline, just can guarantee with capacity
Variation so that the flow velocity of each monitoring sample and the mean flow flow rate of passage set up linear functional relation；It could be with
The variation of capacity, ensure at automatic monitoring section, automatic point measurement flow rate, transfer matic measurement flow rate and from
Dynamic planar survey flow rate, sets up with the mean flow rate flow of flow velocity, that is, passage of manual monitoring section (monitoring sample)
Linear functional relation, by automatic monitoring method or manual monitoring method calculate exhaust by the flow velocity of the monitoring section,
Particle concentration and gas species concentration and total emission volumn.
Utility model content
The utility model solve the technical issues of be：If the key facility of a gas measurement device, that is, straight socket,
The length of its straight socket channel section and the size and ratio of equivalent diameter, manual monitoring section (monitoring site) and automatic monitoring
The position of section (monitoring site), which is set, to be met《In 16157-1996 Concentration in Fixed Pollutants Source of GB/T particulate matter measure with
The gaseous pollutant method of sampling》、《The fixed pollution source smoke discharge continuous monitoring technical specifications of HJ/T75-2007》With《HJ/T
397-2007 waste gas in fixed source Specifications of Monitoring Technology》When providing technical conditions, gas flows through monitoring section (monitoring sampled point
Position) when then in vortex/wadding stream/turbulence state, can not all be fitted using manual methods and automated process in each monitoring sample
When accurately measure the flow rate of exhaust, can not accurately gather the representational particulate matter of measurement, gaseous matter (pollutant), nothing
Method accurately calculates corresponding particulate matter, the concentration and discharge capacity of gaseous matter (pollutant).
If thermal power plant flue gas exhaust amount is big, rate of discharge is high, when discharging flue gas using a smoke evacuation socket, socket
Equivalent diameter is big, and socket section is big；Length is restricted when its socket is in narrow space, measurement exhaust flow rate flow,
One straight socket channel section of particulate matter and pollutant is not achieved " preceding " two after preceding four " as defined in above-mentioned three technology specification
Three " when requiring after six, and flue gas then generates vortex/wadding stream/turbulence state when flowing through monitoring section (monitoring sample).Even if
In the case of flue gas emission rate stabilization, unsure state is also in the flow velocity that flows to of each monitoring sample flue gas, no
The flue gas flow rate flow and pollutant discharge amount of monitoring sample where energy Accurate Determining, each flue gas stream for monitoring sample
Fast flow can not represent the flow rate of peripheral region section.Especially when point measurement flow velocity, the line using automatic monitoring method
When measuring flow velocity or local planar survey flow velocity, it is impossible to pass through the flow rate and the mean flow rate flow of passage monitored automatically
Linear functional relation, that is, the velocity field coefficient of (the mean flow rate flow of manual methods monitoring) or velocity field linear functional relation,
Exhaust flow rate flow and total emission volumn are accurately measured using real-time automatic monitoring.Using the pipe before flue gas flows through straight socket section
It installs deflector at cylinder additional, the mode of water conservancy diversion is carried out to corresponding flue gas, by air flow guiding at each monitoring site of straight pipe, but still
Can generate flow instabilities state at the straight pipeline section of measuring device, by the flue gas of monitoring section (monitoring sample) according to
It is so vortex/wadding stream/turbulence state, is still not achieved using manual monitoring method and automatic monitoring method Accurate Determining flue gas stream
The requirement of fast flow and pollutant discharge amount.
To solve the above problems, the utility model provide it is a kind of be suitable for measurement gas flow rate flow, particle concentration and
The measuring device of gas species concentration, and detection method and application are provided, by the way that socket and its measuring device main part will be vented
The straight socket Tong Duan roads divided are arranged to the space of several autonomous channels, the straight socket of each independent measuring device main part
Passage length and equivalent diameter and ratio reach requirement as defined in above-mentioned three technology specification, in each independent measuring device master
Set respectively at the straight socket channel section of body portion the manual monitoring section (monitoring sample) that meets technical stipulation and from
Dynamic monitoring section (monitoring sample), meets using manual monitoring method and automatic monitoring method to flow rate, particulate matter
With the measurement of gaseous matter.
Specifically, in view of the deficiencies of the prior art, the utility model provides following technical solution：
A kind of Exhaust Measurement Equipment, which is characterized in that the measuring device is the exhaust socket containing straight pipeline section, internal
Partition plate has been horizontally disposed with along airflow direction, exhaust socket is divided into more than two autonomous channels, is set inside each autonomous channel
The monitoring section vertical with exhaust socket axial line is equipped with, monitoring sample is provided on the monitoring section, is adopted in monitoring
Monitoring holes are provided at exhaust pipe drum outer wall on the extension cord of sampling point position, the position of the monitoring section meets the following conditions：
L=lBefore+lAfterwards；lBefore≥2D；lAfterwards≥0.5D；
Wherein, D is the equivalent diameter of each autonomous channel；
L is the length of the straight pipeline section in each autonomous channel；
lBeforeThe length of the straight pipeline section in upstream before monitoring section is flowed through for air-flow；
lAfterwardsThe straight length of pipe section in the downstream after monitoring section is flowed through for air-flow.
Preferably, in above-mentioned measuring device, the position of the monitoring section meets the following conditions：L=lBefore+l Afterwards；lBefore≥
4D；lAfterwards≥2D。
Preferably, in above-mentioned measuring device, the position of the monitoring section meets the following conditions：L=lBefore+lAfterwards；lBefore≥6D；
lAfterwards≥3D。
Preferably, in above-mentioned measuring device, the position of the monitoring section meets the following conditions：6D≥lBefore≥2D；3D≥
lAfterwards≥0.5D。
Preferably, in above-mentioned measuring device, the position of the monitoring section meets the following conditions：6D≥lBefore≥4D；3D≥
lAfterwards≥2D。
Preferably, in above-mentioned measuring device, the monitoring section includes manual monitoring section and automatic monitoring section, respectively
It is provided with manual monitoring sample and automatic monitoring sample, the spacing of the manual monitoring section and automatic monitoring section
≥0.5m。
Preferably, in above-mentioned measuring device, the monitoring section is rectangle or circle.
Preferably, in above-mentioned measuring device, the partition plate cross arrangement, it is preferred that in mesh font, matrix pattern or groined type
Arrangement.
Preferably, in above-mentioned measuring device, the measuring device is internally provided with inner cylinder, the inner cylinder and exhaust socket it
Between form annular waste air duct, partition plate is disposed radially in annular waste air duct, and the inner cylinder is in airflow inlet and exit
Baffle is provided with, makes to form enclosure space inside inner cylinder.
Preferably, in above-mentioned measuring device, the automatic monitoring site is arranged at automatic monitoring section center；In hand
On dynamic monitoring section, manual monitoring point position is set up in the radial line between two endplate of autonomous channel.
Preferably, in above-mentioned measuring device, the automatic monitoring site is arranged at automatic monitoring section near center location
Or line when measuring by center, on manual monitoring section, set up between two endplate of autonomous channel 1~6
Item by the straight radial line at cylinder section center, setting up 1~10 manual monitoring point position respectively, each generation for monitoring sample
The monitoring section of its neighboring area same shape of table.
Preferably, in above-mentioned measuring device, the measuring device is detachable exhaust socket, for dismantling or being mounted on
On discharge duct.
The utility model also provides a kind of exhaust sampling apparatus, which is characterized in that the sampling apparatus is to contain straight pipe
The exhaust socket of section, inside have been horizontally disposed with partition plate along airflow direction, and exhaust socket is divided into more than two autonomous channels,
Each autonomous channel is internally provided with the monitoring section vertical with exhaust socket axial line, and being provided with monitoring on the monitoring section adopts
Sampling point position, monitoring sample extension cord on exhaust pipe drum outer wall at be provided with monitoring holes, the position of the monitoring section
Meet the following conditions：
L=lBefore+lAfterwards；lBefore≥2D；lAfterwards≥0.5D；
Wherein, D is the equivalent diameter of each autonomous channel；
L is the length of the straight pipeline section in each autonomous channel；
lBeforeThe length of the straight pipeline section in upstream before monitoring section is flowed through for air-flow；
lAfterwardsThe straight length of pipe section in the downstream after monitoring section is flowed through for air-flow.
Preferably, in above-mentioned sampling apparatus, the position of the monitoring section meets the following conditions：L=lBefore+l Afterwards；lBefore≥
4D；lAfterwards≥2D。
Preferably, in above-mentioned sampling apparatus, the position of the monitoring section meets the following conditions：lBefore≥6D；lAfterwards≥3D。
Preferably, in above-mentioned sampling apparatus, the position of the monitoring section meets the following conditions：6D≥lBefore≥2D；3D≥
lAfterwards≥0.5D。
Preferably, in above-mentioned sampling apparatus, the position of the monitoring section meets the following conditions：6D≥lBefore≥4D；3D≥
lAfterwards≥2D。
Preferably, in above-mentioned sampling apparatus, the quantity of the autonomous channel is 2~20, is preferably 4~12.
Preferably, in above-mentioned sampling apparatus, the measuring device is detachable exhaust socket, for dismantling or being mounted on
On discharge duct.
In above-mentioned sampling apparatus, the monitoring sample is used to sample.
The utility model also provides the measuring method of above-mentioned measuring device, which is characterized in that including to exhaust flow rate and stream
The measurement of amount, wherein, the measuring method of the exhaust flow rate comprises the following steps：
(1) measurement autonomous channel monitoring section respectively monitors the flow velocity of sample, then by following formula calculate it is each solely
The mean flow rate of vertical passage；
Wherein,For the mean flow rate of autonomous channel A, measurement unit m/s；
VAiFor each monitoring sample A of autonomous channel AiFlow velocity, measurement unit m/s；
SAiRespectively to monitor sample A in the A of autonomous channeliThe sectional area of the monitoring sampled point section of representative, measurement unit
For m2；
(2) flow velocity of overall gas in exhaust socket is calculated by following formula：
Wherein, VAlwaysFor the flow velocity of overall gas in exhaust socket, measurement unit m/s；
ViFor the mean flow rate of autonomous channel i, measurement unit m/s；
SiFor the sectional area of autonomous channel i, measurement unit m2；
Preferably, in above-mentioned measuring method, the measuring method of the extraction flow comprises the following steps：
(1) measurement autonomous channel monitoring section respectively monitors the flow velocity of sample, then by following formula calculate it is each solely
The mean flow rate of vertical passage；
Wherein,For the mean flow rate of autonomous channel A, measurement unit m/s；
VAiIt is each monitoring sample A of autonomous channel AiFlow velocity, measurement unit m/s；
SAiTo monitor sample A in the A of autonomous channeliThe sectional area of the monitoring point section of representative, measurement unit m2；
(2) flow of each autonomous channel is obtained by following formula：
Wherein, QAFor the flow of autonomous channel A, measurement unit m3/s；
SAFor the sectional area of autonomous channel A, measurement unit m2；
(3) total flow of gas in exhaust socket is obtained by following formula：
Wherein, QAlwaysFor the total flow of overall gas in exhaust tube, measurement unit m3/s；
QiFor the flow of autonomous channel i, measurement unit m3/s。
Preferably, in above-mentioned measuring method, the measuring method further includes the survey of particle concentration and gas species concentration
Amount process, comprises the following steps：
Particle concentration and gas species concentration establish total amount according to the mixability before exhaust imports each measuring device
Discharge capacity and each independent measured levels relation, when assert import before be uniformly mixed when, using the measurement data of a measuring device
Total discharge capacity is calculated to represent.
The utility model also provides above-mentioned measuring device particulate matter measure or gas in exhaust flow rate and/or flow, exhaust
The application in body substance-measuring field.
Measuring device described in the utility model also can be applicable in Concentration in Fixed Pollutants Source to particulate matter and gaseous pollutants
Sampling.
The beneficial effects of the utility model are：
(1) it can realize big in discharge duct equivalent diameter, but be vented socket air stream axle to direction because of narrow space, exhaust
The socket air-flow axial direction confined space only sets an independent exhaustion socket, and the straight socket passage segment length of measuring device is with working as
Defined " three after the first six ", " two after preceding four " and " the first two is later half " is not achieved when technical stipulations require in amount diameter and ratio, if
Found the autonomous channel measuring device of more than two parallel connection, make the straight socket passage segment length of its measuring device and equivalent diameter and
Ratio reaches defined technology requirement.
(2) when setting up an exhaust socket, equivalent diameter is big, reaches " the first six after three ", " two after preceding four " and " after the first two
Half " when technical stipulations require, the straight socket of measuring device is long, and occupied space is big, and construction cost is expensive, and set up two with
On autonomous channel measuring device in parallel, will exponentially reduce the straight socket length of measuring device, occupied space and construction into
This, improves Construction and operation benefit.
(3) when discharge duct equivalent diameter is big, only there are one the straight socket monitorings of exhaust socket one measuring device of passage
Section super large when manual monitoring sample quantity is more, needs multiple manual monitoring sampling platforms, is adopted when selecting a set of manual monitoring
Sampling instrument equipment, an effective period is longer, (its exhaust flow rate size variation in effective period within a longer effective period
In the range of 12% within increase and decrease or continuous discharge 1h) it completes to an independent measuring apparatus manual monitoring section (prison
Survey sample) a flow rate measurement and particle sampling, it is difficult to ensure its exhaust flow rate size variation in 12% scope
Interior increase and decrease, and multigroup personnel are monitored within an effective period and are adopted using more set manual monitoring sampling instrument equipment
Sample can generate uncontrollable factor and the uncertainty of measurement, and therefore, it is difficult to ensure the manual monitoring in the monitoring section of super large
Accuracy.
When discharge duct equivalent diameter is big, only there are one the exhaust straight socket monitoring sections of one measuring device of socket passage
Super large, automatic monitoring section is larger, and automatic monitor sampled measurements apparatus has been difficult to reach monitoring section central area,
It is difficult to ensure that the stability accuracy of measurement flow rate measurement.
If setting up more than two autonomous channel in parallel measuring devices, it will cause the straight of each independent measuring apparatus
The area of the monitoring section of socket passage is appropriate, the width and construction cost of each monitoring sampling platform will be greatly reduced, every
At one autonomous channel measuring device, time effective period greatly reduces, and the monitoring sampling platform used will greatly reduce,
Manual methods monitoring, which can be used, is no longer than the shorter measurement sampling guns of 4m, the socket outer wall that can adjust the distance at monitoring holes (or
Person monitors outer end of hole) monitoring site within 3m, the gradually arrival of exactly one by one, and steady specification accurately carries out flow velocity
Flow and particulate matter measurement sampling.Simultaneously to complete once to monitor, the sampling platform quantity used is reduced, and improves spot sampling prison
The convenience flexibility stability of survey.It, can be in due course accurately effectively all at one in time in each autonomous channel measuring device
Once effectively measurement is completed in phase, reduce the input of manual monitoring instrument and equipment and increases the monitoring that monitoring personnel's number is brought
Cost, and then complete the measurement of each independent socket channel vent, ensure that the manual monitoring of whole autonomous channels real-time and
Accuracy.
(4) when straight socket passage segment length and equivalent diameter and ratio reach " the first six after three ", " two after preceding four " and " preceding
Two is later half " when technical stipulations require, each autonomous channel is measured using point measurement flow rate, the line of automatic monitoring method
The mean flow rate flow of flow rate or the passage of automatic local planar survey flow rate and manual monitoring establishes linear letter
Number relation that is, by the accurate velocity field coefficient function set up, realizes that real-time and accurate measurement is arranged by automatic monitoring method
Gas velocity flow, particle concentration and gas species concentration and its discharge capacity.
Measuring device and method described in the utility model are accurate measurement exhaust gas discharges, improve exhaust emission unit to exhaust gas
It discharges effective environmental management, while is government to environmental supervision and administrations such as the blowdown license of exhaust emission unit, environment tax revenues,
For receive social environment supervision by the public etc. provide just open fair scientific and effective monitoring evidence reliable measuring device and
Method.
Description of the drawings
Fig. 1-a are the structure chart of measuring device described in embodiment one；Fig. 1-b are to be monitored in measuring device described in embodiment one
The distribution schematic diagram of sample；Fig. 1-c are the distribution schematic diagram of manual monitoring sample in one autonomous channel A of embodiment.
Fig. 2-a are the structure chart of measuring device described in embodiment two；Fig. 2-b are to be monitored in measuring device described in embodiment two
The distribution schematic diagram of sample.
Fig. 3-a are the distribution schematic diagram that sample is monitored in measuring device described in embodiment three.
Fig. 3-b are the distribution schematic diagram that sample is monitored in measuring device described in example IV.
Specific embodiment
In view of current some fields, such as thermal power plant are vented the measurement of flue gas in socket：With showing for extraction flow
Variation is write, using manual monitoring method in manual monitoring section part, the measurement sheet of the flow rate of each manual monitoring sample
Ying represents the flow rate of the point position periphery certain area section flue gas emission, flow rate and be its entire manual monitoring
The mean flow rate flow of section；With the significant changes of extraction flow, using automatic monitoring method at automatic monitoring section,
Either the flow rate value of transfer matic measurement or automatic planar survey should be with the mean flow rate of manual monitoring section for automatic point measurement
Flow is linear functional relation, no matter using manual monitoring method or can in due course accurate measurements using automatic monitoring method
It is vented the rate of discharge and discharge capacity of flue gas in socket.But when its manual monitoring sample section and automatic monitoring sample
Straight socket channel section length violation residing for section closes technical stipulations such as " three after the first six ", " two after preceding four " or " the first two is later half "
When, it respectively monitors sample flue gas and is in unordered vortex/wadding stream/turbulence state, it can not Accurate Determining exhaust flow rate flow
Rate of discharge and discharge capacity.The utility model provides the measuring device of a kind of applicable flow rate, particulate matter and pollutant,
Measuring device is more than two independent measuring devices in parallel, and main body facility part is the straight pipe equipped with monitoring holes
Cylinder, length and equivalent diameter and ratio at straight socket channel section meet before " three after the first six " either " two after preceding four " or
Technical stipulations such as " the first two are later half ".
In a kind of preferred embodiment, the utility model provide it is a kind of be suitable for measurement gas, exhaust gas and flue gas flow rate and/
Or the measuring device of flow, particulate matter and gaseous matter, the straight pipeline section part setting for being vented socket passage is divided into several only
Passage A, B, C, the D ... in vertical space, using each independent straight pipeline section passage as an independent measuring apparatus main body facility
Unit sets manual monitoring thieff hatch and automatic monitoring sample devices, passes through the straight pipe according to demand of technical standard measurement
Flow rate, particle concentration or the gas species concentration and discharge capacity of gas/exhaust gas/flue gas of Duan Tongdao.For example, A leads to
The monitoring sample in road is A1、A2、A3……Ai, multiplied by the monitoring section in region near being represented with the monitoring sample
Area, for the flow rate in each monitoring sample region.The mean flow rate for then having A channel is：
Wherein,For the mean flow rate of autonomous channel A, measurement unit m/s；
VAiIt is the flow velocity of each monitoring site of autonomous channel A, measurement unit m/s；
SAiFor A in A channeliThe area for the monitoring point section that point position represents, measurement unit m2；
In addition, the flow of A channel is：
Wherein, QAFor the flow of autonomous channel A, measurement unit m3/s；
SAFor the sectional area of autonomous channel A, measurement unit m2；
In addition, the flow velocity of overall gas is in exhaust tube：
Wherein, VAlwaysFor the flow velocity of overall gas in exhaust socket, measurement unit m/s；
ViFor the mean flow rate of autonomous channel i, measurement unit m/s；
SiFor the sectional area of autonomous channel i, measurement unit m2；
The flow of overall gas is in exhaust tube：
QAlwaysFor the flow of overall gas in exhaust socket, measurement unit m3/s；
QiFor the flow of autonomous channel i, measurement unit m/s；
Each independent measuring device using automatic monitoring method measure gas emissions, manual monitoring flow rate with from
The dynamic corresponding calculated relationship of flow rate that monitors is to be with automatic monitoring velocity field coefficient function formula：
Kv=VManually×SManually/VAutomatically×SAutomaticallyFormula (5)
VManually×SManually=Kv×VAutomatically×SAutomatically+ b formula (6)
When automatic monitoring section area is equal with manual monitoring cross-sectional area：
VManually=Kv×VAutomatically+ b ' formula (7)
Wherein, KvTo monitor flow rate speed field coefficient automatically；
VManuallyFor the mean flow rate of manual monitoring section part exhaust, measurement unit m/s；
SManuallyFor the area of manual monitoring section (point position), measurement unit m2；
VAutomaticallyFor the flow velocity of the measurement of automatic monitoring point, line measurement or planar survey, measurement unit m/s；
SAutomaticallyFor the area of automatic monitoring section (point position), measurement unit m；
B be linear relation in functional value, measurement unit m3/s；
B ' be linear relation in functional value, measurement unit m/s；
Wherein, automatic monitoring velocity field coefficient function formula also can be according in range of flow different in flow rate《HJ/T75 consolidates
Determine pollution sources fume emission continuous monitoring technical specification》It is calculated.
K in the utility modelvScope be preferably 1/3 ＜ Kv＜ 3.
In another preferred embodiment, the utility model provide it is a kind of be suitable for measurement gas (as discharge flue gas and
Exhaust gas) flow velocity and/or flow, the measuring device of particle concentration and gas species concentration, it is characterised in that the utility model
Measuring device original being divided by a socket passage on the autonomous channel of more than two parallel connections, to gas flow rate and/or
Flow and particle concentration and gas species concentration measure, that is, are characterized in that the utility model gas is produced from gas
The exhaust socket that more than two parallel connections are arranged to during raw or treatment facility discharge (discharge or be discharged into) is discharged, and
Established at the straight pipeline section of each in parallel exhaust socket measuring device measure or by one be vented socket and two with
The exhaust socket of upper parallel connection is established measuring device together with being discharged, in the straight socket section of the exhaust socket of each parallel connection and is carried out
Measurement, the shape of straight socket are mainly circular socket or square type socket, the length of each independent straight socket in parallel and
Equivalent diameter and ratio meet related Specifications of Monitoring Technology requirement, and each independent straight socket outer wall is provided with manual monitoring sampling
Hole and automatic monitoring sample devices device mounting hole.Manual monitoring sampling perforate is used to use using manual methods monitoring sampling,
Automatic monitoring perforate is mainly used for installing the mounting hole of automatic monitoring sample devices.Gas independently leads to by more than two in parallel
During the measuring device in road, manual monitoring method can be respectively adopted with automatic monitoring method to being carried out by the gas of each autonomous channel
The measurement of relevant item parameter.Gas can merge in an exhaust pipe again after the measuring device of more than two autonomous channels
Cylinder discharges together, can also be discharged respectively in different exhaust sockets.Some measure the item parameter (such as gas temperatures of the utility model
Degree, gas humidity) it can be surveyed at the shared pathway position before and after the measuring device of gas remittance or each autonomous channel of remittance abroad
Amount.
Wherein, the equivalent diameter of the straight socket section of each autonomous channel measuring device be respectively D1, D2, D3 ...；
To rectangular flue, equivalent diameter D=2AB/ (A+B), A, B are the rectangular flue length of side in formula.
Wherein, the length of the straight socket section of each autonomous channel measuring device is respectively l1、l2、l3、l4……。
Preferably, the structure of barrel wall of the straight socket section of each measuring device in airflow direction can connect also non-
Connection；Straight its equivalent diameter of socket section of each measuring device can be equal or unequal；Each measuring device it is straight
Its length of socket section can be equal or unequal；Each measuring device is integral or each with the exhaust socket before and after it
From the part of independent load.
Each measuring device disclosure satisfy that in certain space《Particulate matter in GB/T16157 Concentration in Fixed Pollutants Source
It measures and the requirement of gaseous pollutant method of sampling technology》、《HJ/T397 waste gas in fixed source Specifications of Monitoring Technology》With《HJ/T75 consolidates
Determine pollution sources fume emission continuous monitoring technical specification》Etc. technical specifications it is gentle to discharge gas flow velocity flow, particle concentration
When body material concentration and discharge capacity measure, to the length of the straight socket passage of its each measuring device and equivalent diameter and the two ratio
Example requirement and monitoring perforate and the requirement for monitoring sample.
It needs to meet following 4 conditions for the measurement of flow rate and particulate matter：
L=lBefore+lAfterwards；
lBefore>=(4~6) D；
lAfterwards>=(2~3) D.
It need to meet following 4 conditions for the measurement of the gaseous matter of discharge：
L=lBefore+lAfterwards；
lBefore≥2D；
lAfterwards≥0.5D.
Wherein, l be the straight socket section of each autonomous channel measuring device length, lBeforeIt is flowed through for air-flow upper before monitoring section
Swim the length of straight socket channel section, lAfterwardsThe straight socket passage segment length in the downstream after monitoring section is flowed through for air-flow, D is each only
The equivalent diameter of vertical passage.
In the straight socket section passage of above-mentioned measuring device, manual monitoring sampling pore cross section (monitoring sample) and automatically
The position of monitoring sampling section (monitoring sample) should meet《HJ/T75 fixed pollution source smoke discharge continuous monitorings technology is advised
Model》Regulation requirement：
(1) smoke canal elbow and section position jumpy should be avoided.
(2) for particulate matter and the automatic monitoring site of flow rate, should be arranged on away from elbow, valve, reducer pipe downstream side
It is to the straight channels not less than 4 times of flue equivalent diameters and straight not less than 2 times of flue diameters away from above-mentioned component updrift side
At passage；
(3) for gaseous pollutant CEMS (Continuous Emission Monitoring System, flue gas emission
Continuous monitor system), it should be arranged on straight not less than 2 times of flue equivalent diameters logical away from elbow, valve, reducer pipe downstream direction
At road and not less than 0.5 times away from above-mentioned component updrift side flue equivalent diameter.
In the straight socket channel section of above-mentioned measuring device, manual monitoring pore cross section (monitoring site) and automatic monitoring section
(monitoring site) should meet《Particulate matter measures and gaseous pollutant method of sampling technology in GB/T16157 Concentration in Fixed Pollutants Source
It is required that》With《HJ/T397 waste gas in fixed source Specifications of Monitoring Technology》Regulation requirement：
(1) prioritizing selection is answered in vertical section in exhaust flow rate flow and particle sampling position, should avoid smoke canal elbow and
Section position jumpy.Sampling location should be arranged on away from elbow, valve, reducer pipe downstream direction not less than 6 times of diameters i.e.
The length l of preceding straight pipeBefore>=6D and away from above-mentioned component updrift side not less than the i.e. length l of straight pipe after at 3 times of diametersAfterwards≥
3D, to rectangular flue, equivalent diameter D=2AB/ (A+B), A, B are the rectangular flue length of side in formula.
(2) air velocity of monitoring section (monitoring site) is preferably in more than 5m/s.
In the straight socket section passage of above-mentioned measuring device, flow to vertical manual monitoring pore cross section with discharge gas and set
There is manual monitoring sample, automatic monitoring sample is set on automatic monitoring section.
The straight socket section of above-mentioned measuring device is wherein：
(1) the straight socket channel section of each measuring device can connect also non-company in the socket wall construction of airflow direction
It connects.
(2) straight its equivalent diameter of socket section of each measuring device can be equal or unequal；
(3) straight its length of socket section of each measuring device can be equal or unequal；
The straight socket shape of above-mentioned measuring device is circle, wherein straight socket intersegmental part is along central shaft or non-central axis
Interior socket is provided with, interior socket is formed circular ring shape socket with outer tube pipe, outwards managed by interior barrel wall using socket central shaft as starting point
Partition plate at the straight radial line of barrel is set, annular socket is split into several separate gas passages.Said inner tube cylinder flue gas into
At mouthful and exit is provided with baffle, and measuring device inner cylinder straight channels intersegmental part is made to form enclosure space.Each separate gas
The shape of passage is half fan shape (bent bottom trapezoidal shape).When calculating its equivalent diameter, by its trapezoidal independent gas in each bent bottom
Body passage is considered as rectangular channel.
Above-mentioned straight socket channel section cross sectional shape is rectangle or circle or half fan-shaped (bent bottom is trapezoidal) or other shapes.
Above-mentioned measuring device is non-disconnectable formula or detachable measuring device, can be dismantled or mounted on discharge duct
On.
The material of above-mentioned measuring device is metal material, nonmetallic materials or metal and nonmetallic composite.
The measuring method of above-mentioned measuring device includes the measurement of flow velocity and/or flow, wherein, measuring the method for flow velocity includes
Following step：
(1) first pass through manual monitoring method and automatic monitoring method measures flow velocity, then survey is calculated by following formula
Measure the mean flow rate of each autonomous channel in the straight socket of device；
Wherein,For the mean flow rate of autonomous channel A, measurement unit m/s；
VAiBe the monitoring section in the A of autonomous channel representated by manual monitoring point flow velocity or automatic monitoring point representated by prison
Survey the flow velocity of section, measurement unit m/s；
SAiFor A in the A of autonomous channeliThe area for the monitoring point section that manual monitoring or automatic monitoring site represent, metering are single
Position is m2；
(2) mean flow rate of overall gas in measuring device is calculated by following formula again：
Wherein, VAlwaysFor the mean flow rate of overall gas in exhaust tube, measurement unit m/s；
ViFor the flow velocity of autonomous channel i, measurement unit m/s；
SiFor the sectional area of autonomous channel i, measurement unit m2。
In above-mentioned measuring method, the method for the measurement flow comprises the following steps：
(1) first pass through manual monitoring and measure each monitoring site flow velocity automatically, be obtained by above-mentioned formula each only
The flow of passage is found, then the flow of each autonomous channel is obtained by following formula：
Wherein, QAFor the flow of autonomous channel A, measurement unit m3/s；
SAFor the sectional area of autonomous channel A, measurement unit m2；
(2) total flow of gas in exhaust tube is obtained by following formula：
Wherein, QAlwaysFor the flow of all gas in measuring device, measurement unit m3/s；
QiFor the flow of autonomous channel i, measurement unit m3/s。
The measuring method of above-mentioned measuring device further includes following step：
Particle concentration and gas species concentration can be established total according to the mixability before exhaust imports each measuring device
The discharge capacity of amount and the relation of each independent measured levels.When being uniformly mixed before assert remittance, the measurement of a measuring device can be used
Data calculate total discharge capacity for representative.
The utility model also provides above-mentioned measuring device in gas, exhaust gas, flue gas flow rate flow and particle concentration and gas
The application of the detection field of body material concentration and total emission volumn.
Exhaust flow rate and/or flow measurement device described in the utility model are further illustrated below by specific embodiment
And measuring method and application.
Embodiment one
It is rectangular channel that socket is vented described in the present embodiment, and straight exhaust socket section is placed for horizontal direction, straight
Socket section position sets 8 autonomous channels, autonomous channel and automatic monitoring site and manual monitoring hole and monitors the setting of position such as
Under：
Socket is vented as shown in Fig. 1-a and 1-b, described in the present embodiment and includes straight exhaust socket section, straight socket segment length
18m, wide 6m, high 8m.It is described to be placed equidistant in straight socket passage along the lateral horizontal position of flue gas flow direction there are three partition plate,
Vertical position is set there are one partition plate, by straight exhaust socket passage be equally divided into 8 autonomous channels be respectively A, B, C, D, E,
F, G and H.The a length of 18m, the wide a height of 2m of 3m of each separate space.
It is set with straight socket axial line vertical direction there are two monitoring section, automatic monitoring sample is located at certainly
At dynamic monitoring section n-n ', manual monitoring sample and monitoring holes are arranged at manual monitoring section m-m ', the monitoring
Section is divided into the section of 8 homalographics by above-mentioned 8 autonomous channels, as shown in Fig. 1-b, the automatic monitoring section n-n ' with
Flue gas enters the distance l at preceding straight socket front endBeforeFor 15m, manual monitoring section and straight socket rear end after flue gas discharge
Distance lAfterwardsFor the interval l of 9m, automatic monitoring section n-n ' and manual monitoring section m-m 'pIt is so far, each independent logical for 0.5m
In road, the equivalent diameter in section is 2.4m, and the preceding straight socket segment length of each autonomous channel is more than its six times equivalent diameter, after
Straight socket segment length is more than the equivalent diameter of its three times, meets to the " preceding of exhaust flow rate flow and measuring concentration of granules in certain
The requirement of three " conditions after six.
As shown in Fig. 1-b, the manual monitoring section of each autonomous channel of A, B, C, D, E, F, G and H is denoted as A-m-m ', B- respectively
M-m ', C-m-m ', D-m-m ', E-m-m ', F-m-m ', G-m-m ' and H-m-m '.In each monitoring section A-m-m ', B-m-m ', C-
6 monitoring sites are set at m-m ', D-m-m ', E-m-m ', F-m-m ', G-m-m ' and H-m-m ', such as "×" symbol institute in Fig. 1-b
Show, manual monitoring sample is 0.5m with the point position of barrel wall closely；It is opened on the barrel wall of the extension cord of monitoring site
If manual monitoring thieff hatch；Automatic monitoring sample is built up in the near center location of the automatic monitoring section of each autonomous channel
Or by center during line measurement, in Fig. 1-bShown in symbol.
As shown in fig 1-c, the section A-m-m ' equivalent of A channel is divided into 6 regions, heart position is set in each area
One manual monitoring sample, uses A respectively1、A2、A3、A4、A5And A6Symbolic indication, each monitoring for monitoring sample and representing
The area in area, that is, each region of point section.A as a result,1And A2Air line distance be 1m, A1And A4Air line distance for 1m,
The setting of monitoring site is similar with A on the section of his autonomous channel, and monitoring sample symbol is according to A channel sample side
Method is expressed as：B1、B2、B3、B4、B5And B6, C1、C2、C3、C4、C5And C6... ....Each independent monitoring device manual monitoring sampled point
Monitoring thieff hatch is set at the barrel wall on the extension line of position, as a result as shown in Fig. 1-b and Fig. 1-c.
Specific detection process is as follows：
1. the measure of manual monitoring flow velocity
The method described in GB/T 16157 detects the flow velocity of each manual monitoring sampled point of each autonomous channel, respectively
It is denoted as VA1、VA2、VA3、VA4、VA5And VA6, and so on, other monitoring points are VB1、VB2、VB3、VB4、VB5And VB6, VC1、VC2、VC3、
VC4、VC5And VC6……。
In the present embodiment, each monitoring sample represents the face of monitoring section (abbreviation monitoring point section) near its measuring point
Product is respectively to be calculated as：SAi、SBi、SCi、SDi、SEi、SFi、SGiAnd SHi(i=1~6), in the present embodiment, each monitoring point section is cut
Area is identical.
So far, can be obtained according to formula (1) and formula (3) in the mean flow rate and exhaust tube being vented in each autonomous channel entirely
The mean flow rate V of portion's gasAlways。
2. the measure of manual monitoring flow
In the present embodiment, each autonomous channel SA、SB、SC、SD、SE、SF、SGAnd SHSectional area it is identical.
So far, the extraction flow Q of each autonomous channel can be calculated according to formula (2) and formula (4)A、QB、QC、QD、QE、QF、
QGAnd QHWith the flow Q being all vented in exhaust tubeAlways。
3. the flow velocity monitored automatically and its velocity field coefficient
In the present embodiment, the monitoring flow velocity of the automatic monitoring sample of each autonomous channel is to be denoted as VAutomatically, pass through flue gas
Automatic monitored control system (CEMS, Continuous Emission Monitoring System) detection obtains, can be according to formula
(5), formula (6) and formula (7) or according to《HJ/T75 fixed pollution source smoke discharge continuous monitoring technical specifications》It is counted
It calculates.
Embodiment two
It is rectangular channel that socket is vented described in the present embodiment, and straight exhaust socket section hangs down (perpendicular) Nogata to placement, suitable
Straight tube cylinder section position sets 4 and independently leads to, autonomous channel and automatically monitoring sample and manual monitoring hole and monitoring sampled point
The setting of position is as follows：
As shown in Fig. 2-a, described in the present embodiment be vented socket straight socket section rectangular cross-section, total length of side for 4m ×
6m, high 16m.It is described that rectangular channel is divided equally and is arranged to four autonomous channels along vertical (perpendicular) Nogata to partition plate is provided with, be respectively
A, B, C and D passage.Each autonomous channel space rectangle length of side is respectively 2m × 3m, high 16m.It is similar with embodiment one, it will be automatic
Monitoring site is located at automatic monitoring section n-n ', and manual monitoring hole is arranged at manual monitoring section m-m '.It is described manual
Monitoring section is divided into the section of 4 homalographics by above-mentioned 4 autonomous channels, is denoted as respectively：A-n-n’、B-n-n’、C-n-n’
And D-n-n ', as shown in Fig. 2-b, the automatic monitoring section n-n ' enters the distance l at preceding straight socket front end with flue gasBeforeFor
10m, the distance l of straight socket rear end after being discharged with flue gasAfterwardsFor 6m, automatic monitoring section n-n ' and manual monitoring section m-m '
At intervals of 0.5m.So far, in each autonomous channel, the equivalent diameter in section is 2.4m, the preceding straight socket of each autonomous channel
Segment length is more than its four times equivalent diameter, and rear straight socket segment length is more than two times of equivalent diameter, meets to exhaust stream
The requirement of fast flow and measuring concentration of granules in certain " two after preceding four " condition.
As shown in Fig. 2-b, the manual monitoring section of each autonomous channel of A, B, C and D is respectively A-m-m ', B-m-m ', C-m-
M ' and D-m-m '.The setting of manual monitoring sample is；Manual monitoring section part in each autonomous channel respectively sets 6 monitorings
Sample, each monitoring sample are 0.5m away from the near distance of barrel wall；In the barrel wall of the extension cord of monitoring sample
On open up monitoring thieff hatch.Automatic monitoring sample the automatic monitoring section of each autonomous channel near center location or
Line measurement point position is similar with embodiment one by center.
The method identical to embodiment one measures corresponding flow velocity and flow.
Embodiment three
The present embodiment is similar with embodiment one, is distinguished as：Socket is vented described in the present embodiment as circle, the exhaust socket
Straight exhaust socket section for horizontal direction either hang down (perpendicular) Nogata to or non-horizontal directions placement.In its straight exhaust socket
Segment pipe is provided centrally with interior socket, and interior socket is closed at both ends, and exhaust does not pass through the interior socket of the closing.Interior socket and outer tube
Tubular circularizes socket, within socket outer wall be starting point, to be vented outer tube pipe inner wall as terminal, be diametrically provided on line
Annular socket is divided into 3 autonomous channels by partition plate, and the shape of each autonomous channel (or claims curl bottom ladder for half fan shape
Shape shape), each autonomous channel is denoted as A, B, C respectively, as shown in Fig. 3-a.
Automatic monitoring sample is provided in the center of the automatic monitoring section of each autonomous channel, in Fig. 3-aShown in symbol, set on manual monitoring section, on several diameter lines between two endplate of autonomous channel manual
Sampled point is monitored, on manual monitoring section, 2 set up between two endplate of autonomous channel pass through cylinder section center
In straight radial line, respectively setting up 3 has manual monitoring point position, and 6 manual monitoring samples, each hand are set up in each autonomous channel altogether
The monitoring section of its neighboring area same shape of the representative of dynamic monitoring sample.As shown in "×" symbol in Fig. 3-a.It is being vented
The radial line in manual monitoring site is provided with manual monitoring thieff hatch on socket barrel.
Measuring device is built up in the straight socket section of each autonomous channel, length and equivalent diameter at each straight socket section
And ratio and monitoring section (monitoring sample) position it is similar with embodiment one, meet " the first six after three ", " after preceding four two or
Technical stipulations such as " the first two are later half ".In the manual monitoring section part of each independent passage, monitoring holes and monitoring sample are set,
As shown in Fig. 3-a, away from no more than 1m, the distance of manual monitoring hole and adjacent separator is adjacent manual monitoring thieff hatch straight hole
The distance in 0.5 times of two adjacent manual monitoring holes, manual monitoring sample are distributed in monitoring holes and circular socket diameter to line
On, as shown in "×" symbol in figure, each manual monitoring sample represents half fan of the homalographic near centered on it
The exhaust flow rate flow of shape (bent bottom is trapezoidal) monitoring section.In each autonomous channel, the half of automatic monitoring section is fan-shaped (bent bottom is trapezoidal)
Near center location sets automatic monitoring sample by the position at center, in figureShown in symbol.Automatic prison
It is generally 0.5m that section, which is surveyed, with manual monitoring section distance.
Wherein, half fan-shaped equivalent diameter computational methods are：The sector Zhou Bianchang of the sectorial area of D=2 × half/half.Each monitoring
The monitoring point section that sample represents is the monitoring section from half sector of each homalographic centered on each monitoring site.
Example IV
Example IV is similar with embodiment three, differs only in：Annular socket is divided into 4 autonomous channels by the partition plate
A, B, C and D.Manual monitoring site, automatic monitoring site and manual monitoring hole to be arranged at embodiment three similar, such as Fig. 3-b institutes
Show：Automatic monitoring section is generally 0.5m with manual monitoring section spacing, and automatic monitoring site is arranged at 4 autonomous channels
The center of automatic monitoring section, in figureShown in symbol；2 set up between each two endplate of autonomous channel
There is manual monitoring point position by the straight radial line at cylinder section center, respectively setting up 3,6 hands are set up in each autonomous channel altogether
Dynamic monitoring sample, the monitoring section of its neighboring area same shape of the representative of each manual monitoring sample.In such as figure
Shown in "×" symbol, the radial line in manual monitoring site is provided with manual monitoring hole on exhaust socket barrel.
Embodiment five
Embodiment five is similar with embodiment three, differs only in：Interior socket is not provided with, directly to be vented socket central shaft
For starting point, exhaust tube walls are terminal, are provided with several partition plates, space in socket is divided into several autonomous channels.
Embodiment six
Embodiment six is similar with embodiment one, differs only in：Detachable company is installed at the exhaust socket both ends
Fitting, for being dismantled or mounted on discharge duct.
In conclusion detection device described in the utility model can be applied to the discharge duct of various sizes, make straight pipe
Section meets technology requirement, and then accurate measurements exhaust flow rate and/or flow, particulate matter and gaseous matter, accurate to measure gas row
High-volume, have broad application prospects.
Claims (10)
1. Exhaust Measurement Equipment, which is characterized in that the measuring device is the exhaust socket containing straight pipeline section, internal along air-flow
Direction has been horizontally disposed with partition plate, and exhaust socket is divided into more than two autonomous channels, each autonomous channel be internally provided with
The vertical monitoring section of socket axial line is vented, monitoring sample is provided on the monitoring section, in monitoring sample
Monitoring holes are provided at exhaust pipe drum outer wall on extension cord, the position of the monitoring section meets the following conditions：
L=lBefore+lAfterwards；lBefore≥2D；lAfterwards≥0.5D；
Wherein, D is the equivalent diameter of each autonomous channel；
L is the length of the straight pipeline section in each autonomous channel；
lBeforeThe length of the straight pipeline section in upstream before monitoring section is flowed through for air-flow；
lAfterwardsThe straight length of pipe section in the downstream after monitoring section is flowed through for air-flow.
2. measuring device according to claim 1, wherein, the position of the monitoring section meets the following conditions：L=lBefore+lAfterwards；
lBefore≥4D；lAfterwards≥2D。
3. measuring device according to claim 2, wherein, the position of the monitoring section meets the following conditions：L=lBefore+lAfterwards；
lBefore≥6D；lAfterwards≥3D。
4. measuring device according to claim 1, wherein the position of the monitoring section meets the following conditions：6D≥lBefore≥
2D；3D≥lAfterwards≥0.5D。
5. according to any one of the claim 1-4 measuring devices, wherein, the monitoring section is including manual monitoring section and certainly
Dynamic monitoring section, is respectively arranged with manual monitoring sample and automatic monitoring sample, the manual monitoring section with from
Spacing >=0.5m of dynamic monitoring section.
6. measuring device according to claim 5, wherein, the monitoring section is rectangle or circle.
7. measuring device according to claim 6, wherein, the partition plate cross arrangement, it is preferred that in mesh font, matrix pattern
Or groined type arrangement.
8. measuring device according to claim 6, wherein, the measuring device is internally provided with inner cylinder, the inner cylinder and row
Annular waste air duct is formed between tracheae cylinder, partition plate is disposed radially in annular waste air duct, and the inner cylinder is in airflow inlet
Exit is provided with baffle, makes to form enclosure space inside inner cylinder.
9. measuring device according to claim 8, wherein, the automatic monitoring site is arranged at automatic monitoring section centre bit
It puts；On manual monitoring section, manual monitoring point position is set up in the straight radial line between two endplate of autonomous channel.
10. measuring device according to claim 1, wherein, the measuring device is detachable exhaust socket, for dismantling
Or on discharge duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720983426.2U CN207456501U (en) | 2017-08-08 | 2017-08-08 | Exhaust Measurement Equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720983426.2U CN207456501U (en) | 2017-08-08 | 2017-08-08 | Exhaust Measurement Equipment |
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| CN207456501U true CN207456501U (en) | 2018-06-05 |
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ID=62247985
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389133A (en) * | 2017-08-08 | 2017-11-24 | 张晨 | Exhaust measurement, sampling apparatus and methods and applications |
| CN115069043A (en) * | 2022-07-21 | 2022-09-20 | 中国核动力研究设计院 | Active adsorption type nuclear-grade air filtering and online monitoring system and method |
-
2017
- 2017-08-08 CN CN201720983426.2U patent/CN207456501U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389133A (en) * | 2017-08-08 | 2017-11-24 | 张晨 | Exhaust measurement, sampling apparatus and methods and applications |
| CN115069043A (en) * | 2022-07-21 | 2022-09-20 | 中国核动力研究设计院 | Active adsorption type nuclear-grade air filtering and online monitoring system and method |
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