CN106018002A - Matrix type mixed constant-speed sampling device - Google Patents
Matrix type mixed constant-speed sampling device Download PDFInfo
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- CN106018002A CN106018002A CN201610326693.2A CN201610326693A CN106018002A CN 106018002 A CN106018002 A CN 106018002A CN 201610326693 A CN201610326693 A CN 201610326693A CN 106018002 A CN106018002 A CN 106018002A
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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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Abstract
The invention provides a matrix type mixed constant-speed sampling device, relates to an online monitoring device for solid particulates or gaseous pollutants in exhaust gas of electric power, petroleum and chemical industry and aims to provide a matrix type mixed constant-speed sampling device which is objective and accurate in sampling and convenient to use. The matrix type mixed constant-speed sampling device comprises an analysis unit and a sampling unit, wherein the sampling unit comprises a constant-speed circular sampling device; the constant-speed circular sampling device comprises a sampling gun; orifices of sampling pipe of the sampling gun are located in a flue; pitot pipe speed measurement devices are arranged on the outer sides of the sampling pipes; a sampling pipeline is connected onto the gun body; a sampling fan is mounted on the sampling pipeline; a sampling solenoid valve is mounted at each of a gas inlet and a gas outlet of the sampling fan; the other end of the sampling pipeline is connected with an inlet joint of a mixer; the pipe diameter of a vertical pipe of the mixer is equal to the sum of the pipe diameters of the sampling pipes, and the length of the vertical pipe is equal to the sum of ten times of length of each sampling pipe; a secondary sampling pipeline is arranged at the lower part of the vertical pipe.
Description
Technical field
The present invention relates to solid particulate matter or gaseous contaminant monitoring technical field, particularly relate to a kind of for electric power, oil and
The solid particulate matter of chemical industry aerofluxus or gaseous contaminant on-Line Monitor Device.
Background technology
At present, the sampling apparatus of all flue gas in power station boiler solid particulate matters or gaseous contaminant monitoring system all uses single-point to sample
Mode, use environment and the condition of the design of this sample mode are can accurately to measure under the conditions of uniform flow field or relatively uniform flow field
Flue gas particles or the concentration of gaseous contaminant.But owing to domestic large-sized station boiler flue is due to technique and space restriction etc.
Reason, flue is arranged that complexity, narrow space, straight length are shorter, is extremely difficult to uniform flow field or the straight length in relatively uniform flow field
Measuring condition (" in Concentration in Fixed Pollutants Source, solid particulate matter measures and the gaseous contaminant method of sampling " (GB/T16157-1996)
Should there is the flow development length of 6 times of equivalent diameters before requiring sampled measurements cross section, after measuring cross section, should have the straight tube of 3 times of equivalent diameters
Segment length).At present station boiler flue is the most all not up to the sampling condition of above-mentioned national regulations, its single-point sample mode relative to
The complexity of heavy in section flue gas duct and disorderly practical situation, occasionality that its sampling is layouted is very big, the sample being extracted from more without
Method represents this cross section particulate matter of flue or the mean concentration of pollutant, causes flue gas solid particulate matter or pollutant levels measurement data
Error is relatively big, cannot meet environmental administration's relevant criterion to particulate matter or the requirement of pollutant on-line monitoring system, also cannot make
For blowdown enterprise being carried out the lawful basis of collection of drainage dues.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of matrix form sampling objective and accurate, easy to use mixing isokinetic sampling's dress
Put.
Matrix form of the present invention mixing isokinetic sampling's device, including analytic unit and sampling unit, described sampling unit includes many sets etc.
Speed circulating sampling device, constant speed circulating sampling device includes that sampling gun, sampling gun include the body of a gun and sampling tube, the mouth of pipe of sampling tube
Being positioned at inside flue, be provided with pitot tube speed measuring device outside sampling tube, the mouth of pipe of multiple sampling tubes is internal same transversal at flue
Surrounding in face is uniformly distributed, and the mouth of pipe is towards direction of the wind comes from, and the body of a gun is positioned at outside flue, and the body of a gun connects sampling conduit,
Being provided with sampling blower fan on sampling conduit, sampling blower fan is provided with converter, converter can change the rotating speed of sampling blower fan,
One sampling electromagnetic valve, the other end of sampling conduit and the import of blender are respectively installed at the air inlet of sampling blower fan and gas outlet
Joint is connected, and the tube wall below the inlet union of blender is long funnel-form, is VERTICAL TUBE below long funnel-form pipe, VERTICAL TUBE
Caliber is identical with the caliber sum of each sampling tube, and the length of VERTICAL TUBE is more than the length of ten sampling pipes, and VERTICAL TUBE bottom is provided with
Double sampling pipeline, double sampling pipeline one end is stretched into inside VERTICAL TUBE, and the other end is connected with the air inlet of analytic unit, and second
Distance between sampling tube and VERTICAL TUBE upper end is the length of ten sampling pipes, and the gas outlet of analytic unit is connected with inside flue,
Being provided with blowback between sampling electromagnetic valve and the sampling gun matched at sampling fan air inlet and sweep pipeline, blowback is swept and is pacified on pipeline
Equipped with blowback electromagnetic valve, the connection of the pipeline other end is swept in blowback back-blowing device, sampling electromagnetic valve and the duty of blowback electromagnetic valve
Switching is controlled by PLC.
Matrix form of the present invention mixing isokinetic sampling's device, wherein said sampling tube uses the 316L stainless steel tube of a diameter of 25mm.
Matrix form of the present invention mixing isokinetic sampling's device, wherein said sampling conduit outer wall is provided with heater and drying device.
Matrix form of the present invention mixing isokinetic sampling's device, the lower end of wherein said long funnel-form pipe is provided with automatic ash removing rod, automatically
Deashing rod can be around the axis of rotation being fixed in mixer inner walls.
Matrix form of the present invention mixing isokinetic sampling's device, the gas outlet of wherein said analytic unit is internal with flue by exhaustor phase
Connection, is connected between the gas outlet of analytic unit and exhaustor and has threeway, and threeway is also connected with the bottom of VERTICAL TUBE.
Matrix form of the present invention mixing isokinetic sampling's device, the pressure that the purging pressure of wherein said back-blowing device is slightly above in flue.
Matrix form of the present invention mixing isokinetic sampling's device, wherein said source purge gas uses compressed air.
Matrix form of the present invention mixing isokinetic sampling's device, the switching action time of wherein said sampling electromagnetic valve and blowback electromagnetic valve is equal
Less than 1s, its valve body is all sampled Stainless steel 316 L.
Matrix form of the present invention mixing isokinetic sampling's device difference from prior art is matrix form of the present invention mixing isokinetic sampling's dress
Installing and be equipped with double sampling, when once sampling, converter is believed by being arranged on the wind speed that on sampling tube, pitot tube speed measuring device records
Number adjust the rotating speed of sampling blower fan, make among the wind speed once sampled and flue identical.The gas once sampled enter blender it
After, in the VERTICAL TUBE of blender, carry out current-sharing and double sampling.The diameter of VERTICAL TUBE is identical with the diameter sum of all sampling tubes,
Wind speed time in the gas entrance VERTICAL TUBE that guarantee is once sampled is still identical with flue, it is ensured that sampling constant speed is carried out；VERTICAL TUBE
Ten times of a length of sampling tube length, both met the length requirement of particulate matter detection front end, sample gas can be made again to mix more
Add fully.Being provided with double sampling pipeline in blender, be used for carrying out double sampling, double sampling is isokinetic sampling, design
More reasonable, sampled data is the most objective and accurate, more representative.It is also associated with blowback on sampling conduit and sweeps pipeline, not
Can periodically carry out blowback when sampling to sweep, the mouth of pipe or the sampling conduit blocking of sampling tube is greatly decreased, improving equipment operation can
By property, avoid safeguarding, easy to use.
Below in conjunction with the accompanying drawings matrix form mixing isokinetic sampling's device of the present invention is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of matrix form of the present invention mixing isokinetic sampling's device.
Detailed description of the invention
As it is shown in figure 1, matrix form of the present invention mixing isokinetic sampling's device includes analytic unit 1 and sampling unit 3, sampling unit 3
Including overlapping constant speed circulating sampling device more.Constant speed circulating sampling device includes that sampling gun, sampling gun include the body of a gun and sampling tube 10,
The 316L stainless steel tube that wherein sampling tube 10 uses a diameter of 25mm thickness to be 2mm, the mouth of pipe of sampling tube 10 is positioned at flue
11 is internal, is provided with pitot tube speed measuring device (being not drawn in figure) outside sampling tube 10.The mouth of pipe of multiple sampling tubes 10 is at cigarette
Surrounding in the internal same cross section in road 11 is uniformly distributed, and the mouth of pipe is towards direction of the wind comes from.According to " in Concentration in Fixed Pollutants Source admittedly
Body particulate matter measures and the gaseous contaminant method of sampling " requirement of (GB/T16157-1996) 4.2.4.2, divides flue 11 section
Becoming suitable homalographic fritter, Ge Kuai center is measuring point.Flue 11 cross section is divided into four squares of homalographic by the present embodiment
Shape, the mouth of pipe of four sampling tubes 10 lays respectively at the center of four rectangles, so makes sampling have more objectivity and representativeness.Rifle
Body is positioned at outside flue 11, and the body of a gun connects sampling conduit 7, sampling conduit 7 outer wall is provided with heater and is dried dress
Putting, in keeping sampling conduit 7, flue-gas temperature is not less than 180 DEG C.Sampling blower fan 4 is installed, blower fan 4 of sampling on sampling conduit 7
On be provided with converter, converter can change the rotating speed of sampling blower fan 4, respectively pacifies at the sampling air inlet of blower fan 4 and gas outlet
Equipped with a sampling electromagnetic valve 5.The other end of sampling conduit 7 is connected with the inlet union of blender 2, the import of blender 2
Tube wall below joint is long funnel-form, and the lower end of long funnel-form pipe is provided with automatic ash removing rod 16, and automatic ash removing rod 16 is permissible
Around the axis of rotation being fixed on blender 2 inwall.Being VERTICAL TUBE 14 below long funnel-form pipe, the caliber of VERTICAL TUBE 14 is with each
The caliber sum of sampling tube 10 is identical, and in so can ensure that blender 2, flue gas flow rate is close to the mean flow rate of flue 11, carries
The objectivity of high double sampling and representativeness.The length of VERTICAL TUBE 14, more than the length of ten sampling pipes 10, so can make to adopt
Sample gas body is flow speed stability in VERTICAL TUBE 14, it is simple to carry out double sampling.VERTICAL TUBE 14 bottom is provided with double sampling pipeline 15,
It is internal that VERTICAL TUBE 14 is stretched in double sampling pipeline 15 one end, and the other end is connected with the air inlet of analytic unit 1, the second sampling tube
Distance between 10 and VERTICAL TUBE 14 upper end is the length of ten sampling pipes 10.In the gas outlet of analytic unit 1 and flue 11
Portion is connected by exhaustor 12, is connected and has threeway 13 between the gas outlet of analytic unit 1 with exhaustor 12, and threeway 13 is also
It is connected with the bottom of VERTICAL TUBE 14.It is easy to the gas after analysis being completed be discharged downstream in flue 11.
It is provided with blowback between sampling electromagnetic valve 5 and the sampling gun matched at sampling blower fan 4 air inlet and sweeps pipeline 9, blowback
Sweeping and be provided with blowback electromagnetic valve 6 on pipeline 9, the connection of pipeline 9 other end is swept in blowback back-blowing device 8.Purging pressure can be according to cigarette
The instant pressure in this cross section in road 11, slightly above this pressure purges, and reduces the interference to neighbouring sample operating point.Source purge gas
Station-service compressed air can be used to use after entering surge tank after pressure regulation, it is ensured that pressure stability.
The duty of sampling electromagnetic valve 5 and blowback electromagnetic valve 6 is controlled switching, sampling electromagnetic valve 5 and blowback electromagnetism by PLC
The switching action time of valve 6 is respectively less than 1s, and its valve body is all sampled Stainless steel 316 L.
The material of above-mentioned all pipelines all uses Stainless steel 316 L.
The operation principle of matrix form of the present invention mixing isokinetic sampling's device is as follows: when normally working, and four set isokinetic sampling's devices are respectively
Sample in the way of constant speed tracking, i.e. record the flow velocity of gas in flue 11 by pitot tube speed measuring device, by flow speed data
Feeding back in the converter arranged on sampling blower fan 4, converter adjusts the rotating speed of sampling blower fan 4, makes sample gas at sampling tube
Flow velocity in road 7 is the most identical with flue 11.Sample gas carries out secondary current-sharing in entering blender 2 afterwards, and by two
Secondary sampling conduit 15 obtains final sample gas, is sent to analytic unit 1.
When certain sampling gun breaks down, such as situations such as sampling blower fan 4 tripping operations, can pass through to close sampling blower fan 4 air inlet/outlet
The sampling electrodynamic valve of mouth will appear from the sampling blower fan 4 of fault isolates, after the signal that is concurrently out of order carries out online Fast-Maintenance and maintenance
Put into operation again.User can carry out branch reverse blow work by default, it is ensured that sampling tube according to practical situation every day
Road 7 is totally, dust stratification and the steady in a long-term of system do not run.
Embodiment described above is only to be described the preferred embodiment of the present invention, not carries out the scope of the present invention
Limiting, on the premise of designing spirit without departing from the present invention, technical scheme is made by those of ordinary skill in the art
Various deformation and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (8)
1. matrix form mixing isokinetic sampling's device, including analytic unit and sampling unit, it is characterised in that: described sampling is single
Unit includes overlapping constant speed circulating sampling device more, and constant speed circulating sampling device includes that sampling gun, sampling gun include the body of a gun and sampling tube,
The mouth of pipe of sampling tube is positioned at inside flue, is provided with pitot tube speed measuring device outside sampling tube, and the mouth of pipe of multiple sampling tubes is at flue
Surrounding in internal same cross section is uniformly distributed, and the mouth of pipe is towards direction of the wind comes from, and the body of a gun is positioned at outside flue, and the body of a gun connects
Having sampling conduit, sampling conduit is provided with sampling blower fan, sampling blower fan is provided with converter, converter can change sampling
The rotating speed of blower fan, is respectively provided with a sampling electromagnetic valve at the sampling air inlet of blower fan and gas outlet, the other end of sampling conduit with
The inlet union of blender is connected, and the tube wall below the inlet union of blender is long funnel-form, is vertical below long funnel-form pipe
Pipe, the caliber of VERTICAL TUBE is identical with the caliber sum of each sampling tube, and the length of VERTICAL TUBE is more than the length of ten sampling pipes, vertically
Pipe bottom is provided with double sampling pipeline, and double sampling pipeline one end is stretched into inside VERTICAL TUBE, the other end and the air inlet of analytic unit
Mouth connects, and the distance between the second sampling tube and VERTICAL TUBE upper end is the length of ten sampling pipes, the gas outlet of analytic unit and cigarette
It is connected inside road, is provided with blowback between sampling electromagnetic valve and the sampling gun matched at sampling fan air inlet and sweeps pipeline,
Blowback is swept and is provided with blowback electromagnetic valve on pipeline, and the connection of the pipeline other end is swept in blowback back-blowing device, sampling electromagnetic valve and blowback electricity
The duty of magnet valve is controlled switching by PLC.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: described sampling tube uses diameter
316L stainless steel tube for 25mm.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: on described sampling conduit outer wall
It is provided with heater and drying device.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: under described long funnel-form pipe
End is provided with automatic ash removing rod, and automatic ash removing rod can be around the axis of rotation being fixed in mixer inner walls.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: giving vent to anger of described analytic unit
Mouth is internal with flue to be connected by exhaustor, and being connected between the gas outlet of analytic unit and exhaustor has threeway, and threeway is also with perpendicular
The bottom of straight tube is connected.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: the purging of described back-blowing device
Pressure is slightly above the pressure in flue.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: described source purge gas uses pressure
Contracting air.
Matrix form the most according to claim 1 mixing isokinetic sampling's device, it is characterised in that: described sampling electromagnetic valve is with anti-
The switching action time blowing electromagnetic valve is respectively less than 1s, and its valve body is all sampled Stainless steel 316 L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326693.2A CN106018002A (en) | 2016-05-17 | 2016-05-17 | Matrix type mixed constant-speed sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326693.2A CN106018002A (en) | 2016-05-17 | 2016-05-17 | Matrix type mixed constant-speed sampling device |
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| CN106018002A true CN106018002A (en) | 2016-10-12 |
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| CN201610326693.2A Pending CN106018002A (en) | 2016-05-17 | 2016-05-17 | Matrix type mixed constant-speed sampling device |
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Cited By (6)
| 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 |
| 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 |
| CN107631916A (en) * | 2017-09-12 | 2018-01-26 | 南京友智科技有限公司 | A kind of more dot matrix high-temperature sampling probes of gaseous contaminant |
| CN108663239A (en) * | 2018-06-14 | 2018-10-16 | 张立升 | Natural gas line sampler |
| CN109540612A (en) * | 2019-01-28 | 2019-03-29 | 河北工业大学 | A kind of multichannel constant speed flue gas sampler |
| CN110793815A (en) * | 2019-10-30 | 2020-02-14 | 南京透明度能源科技有限公司 | Matrix type flue gas sampling device |
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| 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 |
| 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 |
| CN107631916A (en) * | 2017-09-12 | 2018-01-26 | 南京友智科技有限公司 | A kind of more dot matrix high-temperature sampling probes of gaseous contaminant |
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| CN108663239A (en) * | 2018-06-14 | 2018-10-16 | 张立升 | Natural gas line sampler |
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| CN110793815A (en) * | 2019-10-30 | 2020-02-14 | 南京透明度能源科技有限公司 | Matrix type flue gas sampling device |
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Application publication date: 20161012 |