CN208270376U - A kind of granularity on-line monitoring system - Google Patents
A kind of granularity on-line monitoring system Download PDFInfo
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- CN208270376U CN208270376U CN201820978736.XU CN201820978736U CN208270376U CN 208270376 U CN208270376 U CN 208270376U CN 201820978736 U CN201820978736 U CN 201820978736U CN 208270376 U CN208270376 U CN 208270376U
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Abstract
The utility model provides a kind of granularity on-line monitoring system.The utility model includes negative pressure sampling apparatus, laser measuring device for measuring and electric cabinet, and negative pressure sampling apparatus includes sampling pipe, sampling pipe hiding slot, sample introduction electrical ball valve, Venturi tube；Electric cabinet is electrically connected with negative pressure sampling apparatus and laser measuring device for measuring, is run with control system and is read measuring signal.The particle stream of the utility model sampler is directly ejected through from the measurement zone of laser measuring device for measuring, it can real-time monitoring grain graininess, measurement accuracy is not by tube cell turbulent flow influence of fluctuations, maintenance workload is small in use process, real-time, accurate data and guidance really can be provided for production run, and avoid the problem of particle is reunited again.
Description
Technical field
The utility model relates to a kind of granularity on-line monitoring systems.
Background technique
It is also increasingly wider in the application of every profession and trade with the continuous improvement and accumulation of powder technology, to powder granularity point
The requirement of cloth measurement is also higher and higher.For coal-burning power plant, coal powder size be influence boiler combustion efficiency an important factor for it
One, coal dust is thinner, burns more complete, unburned carbon in flue dust is smaller, and boiler combustion efficiency is higher.But coal dust is meticulous to will increase powder electricity processed
Consumption, therefore, the optimal control to coal powder size, to instruct coal pulverizer operation, reduce energy consumption, reduce pollution be of great significance.
For cement plant, the size distribution of cement powder directly determines the intensity and stability of cement.
The traditional measurement method of powder granularity distribution is sieve method, and coal-burning power plant surveys fineness of pulverized coal, cement plant with vibrating screen
It is sieved with negative pressure and surveys cement fineness.Using the laser particle analyzer of Mie theory, obtained in the past 20 years it is widely available, can be with
The detailed size distribution of powder is provided well, but both methods still falls within off-line measurement.The sampling amount of traditional sieve method is big,
Stability is relatively high, but can only provide one or two and tail over index, the size distribution situation of powder cannot be described in detail, to present
Production enough data supportings cannot be provided, and cumbersome, large labor intensity.And offline laser particle analyzer solves
Problem above, but be a kind of offline laboratory analysis methodologies as sieve method, need user to field sampling, then arrive experiment
Room analysis measurement, can not achieve real-time measurement, cannot provide for production run and timely and effectively instruct.
The On-line Measuring Method of current existing grain diameter is mainly electric method, ultrasonic method, digital image method and optics
Method etc..Electrical method includes electric induction method, electrostatic method and capacitance method.Using electrical method measurement granularity vulnerable to complicated electromagnetism ring
The interference in border, the example of rare business application.The main application that supercritical ultrasonics technology measures solid particle size is ultrasonic attenuation particle size analyzer, is surpassed
Acoustic attenuation particle size analyzer obtains the particle diameter distribution of particle according to the relationship between granular size and intensity of acoustic wave decaying.Optical means
Mainly light Fluctuation Method, light Fluctuation Method can realize the monitoring to average grain diameter in tube cell.
Interference of the on-line measurement that electrical method is realized vulnerable to complex electromagnetic environment, and the letter between partial size and particle diameter distribution
Number Relationship Comparison is complicated, it is difficult to realize accurate, stable granulometry.Ultrasonic attenuation particle size analyzer is then to be suitable for particles in solution
Granulometry, limitation is larger.Light Fluctuation Method measurement be pipeline endoparticle average grain diameter as sieve method, cannot
Provide detailed size distribution.
Summary of the invention
For the above-mentioned deficiency of the prior art, the utility model proposes one kind to dissipate (Mie scattering) reason based on Michaelis
The laser particle size on-line monitoring system of opinion, solves that existing off-line measurement method is cumbersome, time-consuming, measurement result is not real-time
The problem of.
To achieve the above object, the technical solution of the utility model is: a kind of granularity on-line monitoring system, including negative
Sampler, laser measuring device for measuring and electric cabinet are pressed, the negative pressure sampling apparatus includes sampling pipe, sampling pipe hiding slot, sample introduction
Electrical ball valve, Venturi tube, counter sample electrical ball valve；The electric cabinet is electrically connected with negative pressure sampling apparatus and laser measuring device for measuring
It connects, run with control system and reads measuring signal；The laser measuring device for measuring include fiber coupled laser, collimation lens,
Diaphragm, fourier lense and multi channel detector, the negative pressure sampling apparatus are fixedly mounted on the tube wall of powder feeding pipe, powder feeding pipe
Tube wall on be provided with longitudinal sampling groove, sampling groove can hide slot with sampling pipe and be connected to, and sampling pipe hingedly may be used by hollow axle
Rotation is hidden in sampling pipe and hides in slot, and sampling pipe is equipped with thieff hatch, and sampling pipe is connected to Venturi tube, Venturi tube it is another
Both ends are connect with compressed air connecting tube and shaping tube respectively, and the discharge port of shaping tube is between diaphragm and fourier lense
Top.Counter sample pipe, the counter sample pipe and powder feeding pipe are equipped at lower section and the alignment of shaping tube nozzle between diaphragm and fourier lense
Connection.
Based on the above technical solution, the utility model can also do following improvement.
Further, the fiber coupled laser, collimation lens, diaphragm, fourier lense and multi channel detector according to
Secondary installation is fixed into same level height.It is modulated to after the collimated lens of laser that the fiber coupled laser issues parallel
Light is setting value using diaphragm adjustment beam diameter, when so that pulverized coal flow passing through laser, the laser that is radiated on pulverized coal particle
Scattering is generated, after fourier lense, the special modality that is radiated on multi channel detector simultaneously turns the scattering light of different angle
It is changed to electric signal, electric cabinet measures these electric signals, and thus calculates the particle diameter distribution of coal dust.
Further, the counter sample pipe is equipped with counter sample electrical ball valve, sets between sampling pipe end and the Venturi tube
There is sample introduction electrical ball valve.
Further, the sampling pipe is equipped with back blow port, to prevent using time longer rear powder particles blocking sampling pipe
On thieff hatch and/or inner hole.
The beneficial effects of the utility model are: the particle stream of 1, sampler is directly sprayed from the measurement zone of laser measuring device for measuring
Penetrate by, can real-time monitoring grain graininess, measurement accuracy is not by tube cell turbulent flow influence of fluctuations, maintenance workload in use process
It is small, real-time, accurate data and guidance really can be provided for production run, and avoid the problem of particle is reunited again；2, it adopts
Sample pipe is using that can hide design, and sampling mode reliability is higher, sampling pipe longer life expectancy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1- sampling pipe, 2- sampling pipe hide slot, 3- sample introduction electrical ball valve, 4- Venturi tube, 5- laser measurement dress
It sets, 6- electric cabinet, 7- counter sample electrical ball valve, 8- powder feeding pipe, 51- fiber coupled laser, 52- collimation lens, 53- diaphragm, 54-
Fourier lense, 55- multi channel detector, 56- particle stream.
Specific embodiment
In the description of the invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the invention.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the invention.
The utility model and its specific embodiment are described in further detail with reference to the accompanying drawing.
Referring to Fig. 1, the utility model includes negative pressure sampling apparatus, laser measuring device for measuring 5 and electric cabinet 6.The negative pressure taking
Sampling device includes sampling pipe 1, sampling pipe hiding slot 2, sample introduction electrical ball valve 3, Venturi tube 4, counter sample electrical ball valve 7；The electricity
Control case 6 has control line and signal input line to be connected to sampler and laser measuring device for measuring 5, is run with control system and reads survey
Measure signal.The negative pressure sampling apparatus is fixedly mounted on the tube wall of powder feeding pipe 8, and longitudinal take is provided on the tube wall of powder feeding pipe 8
Sample slot, sampling groove can hide slot 2 with sampling pipe and be connected to, and hinged rotatable to be hidden in sampling pipe hidden by hollow axle for sampling pipe 1
It hides in slot 2, sampling pipe 1 is equipped with thieff hatch, and sampling pipe 1 is connected to Venturi tube 4, and the another both ends of Venturi tube 4 are separately connected
Compressed air connecting tube and shaping tube, shaping tube can be cyclone separator, and the discharge port of shaping tube is located at diaphragm 53 and Fourier
Top between lens 54, particle stream are directly ejected through from the measurement zone of laser measuring device for measuring, can real-time monitoring grain graininess,
Measurement accuracy is not by tube cell turbulent flow influence of fluctuations, and maintenance workload is small in use process, can really for production run provide in real time,
Accurate data and guidance, and avoid the problem of particle is reunited again.
Be equipped with counter sample pipe at lower section between diaphragm 53 and fourier lense 54 and the alignment of shaping tube nozzle, the counter sample pipe with
Powder feeding pipe connection.
The counter sample pipe is equipped with counter sample electrical ball valve, in the connecting tube between 1 end of sampling pipe and Venturi tube
Equipped with sample introduction electrical ball valve.
In order to prevent using the thieff hatch and/or inner hole on rear coal dust blocking sampling pipe of long duration, sampling pipe 1 is equipped with anti-
Mouthpiece.The connecting tube other end is equipped with venturi ring, and venturi ring one end is equipped with Venturi nozzle, venturi by internal screw thread
Inlet suction port is installed, Venturi nozzle can generate axial displacement by its external screw thread and venturi ring, to reach on nozzle
Adjust the purpose of negative pressure in sampling pipe 1.Shaping tube is installed on the outlet port of venturi ring, and counter sample pipe is installed on detection device
Powder outlet end is also equipped with counter sample electrical ball valve on counter sample pipe.When without sampling, sampling is withdrawn in the rotation of sampling pipe 1
It manages and hides in slot 2, each valve (3,7) is closed.
The laser measuring device for measuring 5 includes fiber coupled laser 51, collimation lens 52, diaphragm 53, fourier lense 54
With multi channel detector 55.It is modulated to directional light after the collimated lens 52 of laser that the fiber coupled laser 51 issues, then
By diaphragm 53, adjustment beam diameter is setting value；When laser passes through pulverized coal flow 56, the laser being radiated on pulverized coal particle is produced
Raw scattering, the scattering light of different angle are radiated at special modality on multi channel detector 55 simultaneously after fourier lense 54
Electric signal is converted to, electric cabinet 6 measures these electric signals, and thus calculates the particle diameter distribution of coal dust.
The utility model is mounted on powder feeding pipes, using negative pressure absorbing sample, and combines laser particle size measurement device, real
The system of existing grain graininess on-line monitoring.Its specific work process is as follows:
Electric cabinet 6 drives sampling pipe 1 to hide it from sampling pipe and pops up from slot 2, is in sample states；It is electronic to open counter sample
Ball valve 7, starting Venturi tube 4 carries out system purge, and laser measuring device for measuring 5 is made to be in original state, opens sample introduction electric ball
Valve 3 pipette samples and is sent into the measurement zone of laser measuring device for measuring 5 from tube cell, and the sample after measurement is by the counter sample electricity opened
Dynamic 7 loopback powder inlet pipe of ball valve；Sample introduction electrical ball valve 3 is closed after completing measurement, while returns to sampling pipe 1 from sampling pipe and hiding slot
2, continue to close Venturi tube 4 and counter sample electrical ball valve 7 after purging a period of time.So far one-shot measurement process is completed.System
Above-mentioned movement is repeated by the setting period, and real time on-line monitoring persistently is carried out to the grain graininess in tube cell.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other relevant technical fields, are also included in the patent protection scope of the utility model.
Claims (4)
1. a kind of granularity on-line monitoring system, it is characterised in that: including negative pressure sampling apparatus, laser measuring device for measuring (5) and automatically controlled
Case (6), the negative pressure sampling apparatus include sampling pipe (1), sampling pipe hiding slot (2), sample introduction electrical ball valve (3), Venturi tube
(4)；The electric cabinet (6) is electrically connected with negative pressure sampling apparatus and laser measuring device for measuring, is run with control system and reads survey
Measure signal；The laser measuring device for measuring (5) includes fiber coupled laser (51), collimation lens (52), diaphragm (53), Fourier
Lens (54) and multi channel detector (55), the negative pressure sampling apparatus are fixedly mounted on the tube wall of powder feeding pipe (8), powder feeding pipe
(8) longitudinal sampling groove is provided on tube wall, sampling groove can hide slot (2) with sampling pipe and be connected to, and sampling pipe (1) passes through middle idle running
The hinged rotatable sampling pipe that is hidden in of axis is hidden in slot (2), and sampling pipe (1) is equipped with thieff hatch, sampling pipe (1) and Venturi tube
(4) it is connected to, the another both ends of Venturi tube (4) are separately connected compressed air connecting tube and shaping tube, and the discharge port of shaping tube is located at
Top between diaphragm (53) and fourier lense (54), lower section and shaping tube between diaphragm (53) and fourier lense (54)
Counter sample pipe is equipped at nozzle alignment, which connect with powder feeding pipe.
2. granularity on-line monitoring system according to claim 1, it is characterised in that: the fiber coupled laser (51),
Collimation lens (52), diaphragm (53), fourier lense (54) and multi channel detector (55) are successively installed and are fixed into same level
Highly.
3. granularity on-line monitoring system according to claim 1, it is characterised in that: it is electronic that the counter sample pipe is equipped with counter sample
Ball valve (7), the sampling pipe (1) are equipped with sample introduction electrical ball valve (3) between end and Venturi tube.
4. granularity on-line monitoring system according to claim 1, it is characterised in that: the sampling pipe (1) is equipped with blowback
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820978736.XU CN208270376U (en) | 2018-06-25 | 2018-06-25 | A kind of granularity on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820978736.XU CN208270376U (en) | 2018-06-25 | 2018-06-25 | A kind of granularity on-line monitoring system |
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| CN208270376U true CN208270376U (en) | 2018-12-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044782A (en) * | 2019-05-20 | 2019-07-23 | 西南石油大学 | Across the scale wide spectrum partial size plugging formula Analytical Methods of Grain Grade of one kind |
| CN113551946A (en) * | 2021-06-26 | 2021-10-26 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Device and method for intelligently measuring fineness of pulverized coal |
| CN115629021A (en) * | 2022-12-20 | 2023-01-20 | 合肥金星智控科技股份有限公司 | Laser particle analyzer system, method of calibrating the same, medium, and computer apparatus |
-
2018
- 2018-06-25 CN CN201820978736.XU patent/CN208270376U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044782A (en) * | 2019-05-20 | 2019-07-23 | 西南石油大学 | Across the scale wide spectrum partial size plugging formula Analytical Methods of Grain Grade of one kind |
| CN110044782B (en) * | 2019-05-20 | 2019-10-11 | 西南石油大学 | Across the scale wide spectrum partial size plugging formula Analytical Methods of Grain Grade of one kind |
| US10782220B1 (en) | 2019-05-20 | 2020-09-22 | Southwest Petroleum University | Cross-scale wide-spectrum particle size plugging formula granularity analysis method |
| CN113551946A (en) * | 2021-06-26 | 2021-10-26 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Device and method for intelligently measuring fineness of pulverized coal |
| CN113551946B (en) * | 2021-06-26 | 2022-08-30 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Device and method for intelligently measuring fineness of pulverized coal |
| CN115629021A (en) * | 2022-12-20 | 2023-01-20 | 合肥金星智控科技股份有限公司 | Laser particle analyzer system, method of calibrating the same, medium, and computer apparatus |
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