CN1272620C - High cencentration powder on-line grain size optical monitoring system - Google Patents
High cencentration powder on-line grain size optical monitoring system Download PDFInfo
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- CN1272620C CN1272620C CN 200410067143 CN200410067143A CN1272620C CN 1272620 C CN1272620 C CN 1272620C CN 200410067143 CN200410067143 CN 200410067143 CN 200410067143 A CN200410067143 A CN 200410067143A CN 1272620 C CN1272620 C CN 1272620C
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Abstract
The present invention particularly relates to an online grain size optical monitoring system for powder with high concentration, which is used for the technical field of monitoring. The present invention comprises an automatic isokinetic sampling module, a powder concentration diluting module, a powder grain size optical measuring module, a sample returning module, a cleaning fluid source and a grain size signal output circuit, wherein both the automatic isokinetic sampling module and the sample returning module are connected with a powder production line; the automatic isokinetic sampling module, the powder concentration diluting module, the powder grain size optical measuring module and the sample returning module are sequentially connected by pipelines; the cleaning fluid source is connected with the powder concentration diluting module and the powder grain size optical measuring module by pipelines; the powder grain size optical measuring module is connected with the powder concentration diluting module and a computer by circuits; the computer is connected with the grain size signal output circuit. The present invention has the advantages of wide measuring objects, strong adaptability, wide measuring ranges, good real-time performance, etc.
Description
Technical field
The present invention relates to a kind of online particle diameter optical monitoring system, particularly a kind of high cencentration powder on-line grain size optical monitoring system is used for monitoring technical field.
Background technology
Powder relates to numerous industrial production sectors, all exist and carry out chemical reaction as many materials in the Chemical Manufacture with the powder form, in these class industrial processes, the powder grain diameter is all influential to production efficiency, product quality and even production run security, so modern industry is more and more higher to the on-line monitoring requirement of powder in producing.Because powder relates to numerous commercial production field, university, scientific research institution and company have carried out research work on the one hand at this both at home and abroad in recent decades, some particle on-line monitoring technique and instruments have been developed, wherein some has realized commercialization and seriation, in these commercial instruments, main measurement parameter is a concentration, can measure the also few of particle diameter.For the high concentration powder,, only there is the instrument of only a few to be competent at especially because the problem and the technological difficulties that relate to are many.
Find that by prior art documents publications such as author Yang Yuying have been introduced the application of laser diffraction formula particle sizing technology in powder body material is learned in " LS230 laser particle analyzer and application thereof " on " Modern Scientific Instruments " 2002 the 3rd phases.This particle size analyzer utilizes diffraction-type optical particulate measuring technique, and laser radiation is to particulate samples, because particle is to the diffraction of light effect, laser shows at particle and deflect that the distribution of diffraction luminous energy has direct relation with grain size.Particle size analyzer utilizes the ring light electric transducer to measure the luminous energy distribution of diffraction light on the different-diameter annulus area, actual measurement luminous energy distributed data is input to computing machine and is handled according to light scattering theory by computing machine, provide grain size and distribution, twin-lens and intensity of polarization light difference patented technology have been adopted on this particle size analyzer, when improving instrumentation, guaranteed the precision of measurement result.This measuring system in use has following weak point: the apparatus structure complexity, and need carry out flashlight with the ring light electric transducer and receive, thereby cost is higher; Instrument adjusting difficulty is big, and is higher to environmental requirement, particularly responsive especially to environmental factors such as vibrations; Need to receive the diffraction light of particle, required laser beam is thick, it is big to receive Lens, and during the very strong powder object of on-line monitoring tack, optical window protection difficulty is big; Measurand concentration height uses underaction, if can only at first carry out off-line measurement by sampling to sample; When poisonous particle is measured, need very complete safeguard procedures.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of high cencentration powder on-line grain size optical monitoring system is provided.Make its have measuring object wide, can survey that particle size range is wide, environmental suitability strong and the advantage of use robotization.The present invention can implement online particle diameter monitoring to powder particle in gas-solid, the liquid-solid polyphasic flow, when particularly being applied to the industrial processes monitoring, is not subjected to high powder concentration limit; Particle size range can be surveyed and general 2 microns to 2 millimeters scopes can be contained; System's tolerance is strong, can work under the rugged surroundings; Observation process is by the computing machine united and coordinating, the automaticity height, and can be the real-time information that production control system provides relevant powder particle size to change.
The present invention is achieved through the following technical solutions, and the present invention includes: automatic isokinetic sampling's module, powder concentration dilution module, powder particle size optical measurement module, sample loopback module, source of clean fluid, computing machine, particle diameter signal output apparatus.Its connected mode: isokinetic sampling's module one end is connected to the powder production equipment and gathers particulate samples and enters detection system inside automatically, automatically the outlet conduit of isokinetic sampling's module links to each other with the inlet end pipeline of powder particle size optical measurement module, the outlet conduit of powder particle size optical measurement module is connected by pipeline with the sample loopback module, the endpiece pipeline of sample loopback module is connecting the powder production equipment, is used for the particle sample of finishing measurement is sent back in the powder production line.Draw two pipelines from source of clean fluid and link to each other with powder particle size optical measurement module with automatic isokinetic sampling's module respectively, both provide the cleaning fluid of dilution powder sample and protection optical device for the back.Be connected with two bars circuit on the computing machine, the primary light electric signal that first powder particle size optical measurement module measures, this signal is transferred to computing machine by lead, calculates the powder grain diameter by computing machine according to optical theory; Another is the particle diameter signal output apparatus, according to the powder production requirement, by computing machine the grain diameter measurement result is converted to the output of corresponding standard signal, and this output signal can be used for other production divisions.
Automatically isokinetic sampling's module is made up of isokinetic sampling's pipe, minute-pressure transmitter, power amplifier, vacuum pump and corresponding connecting tube.Isokinetic sampling's pipe is connected with vacuum pump by pipeline, and the outlet conduit of vacuum pump has constituted the outlet of automatic isokinetic sampling's module.Pressure tap on the inside and outside wall of isokinetic sampling's pipe links to each other with the minute-pressure transmitter, and the minute-pressure transmitter is transformed to the standard electric signal with the pressure reduction of pressure tap, and this electric signal is imported power amplifier as control signal, drives vacuum pump by power amplifier, realizes isokinetic sampling's process.
The vacsorb powder sample that isokinetic sampling's pipe utilizes vacuum pump to extract, the size of vacuum tightness is being controlled the speed that sample enters isokinetic sampling's pipe.Have static opening on the inside and outside wall of isokinetic sampling's pipe, pressure differential inside and outside the minute-pressure transmitter is managed the isokinetic sampling between wall is converted to the standard electric signal and is input to power amplifier, drive vacuum pump and control its vacuum tightness by power amplifier, control the isokinetic sampling thus and manage the speed that sucks polyphasic flow, the inside and outside polyphasic flow speed of pipe is equated, finish the isokinetic sampling.The isokinetic sampling makes the powder particulate samples that collects representative, guarantees that monitoring system provides the reliability of particle diameter information for production control system.
Powder concentration dilution module is made up of flow control valve, sample delivery pipeline, the first cleaning fluid pipeline, mixing tube.Automatically isokinetic sampling's module outlet conduit directly links to each other with the sample delivery pipeline of powder concentration dilution module, and the sample delivery pipeline connects with the bigger mixing tube of diameter.The first cleaning fluid pipeline links to each other with source of clean fluid, is connected with mixing tube through the other end behind the flow control valve, after the sample of collection and cleaning fluid mix in mixing tube, flows to powder particle size optical measurement module.In this module, powder sample process sample delivery pipeline from automatic isokinetic sampling's module input, together be input in the mixing tube with cleaning fluid, both fully mix and at utmost reduce between powder reunite after, powder particle size optical measurement module output downstream.Wherein the cleaning fluid flow is by Flux Valve Control, and the control signal of flow control valve is taken from powder particle size optical measurement module.
Powder particle size optical measurement module is made up of tubular type measuring section, Laser emission end, transmitted light receiving end, the second cleaning fluid pipeline, computing circuit, A/D change-over circuit, concentration signal circuit.The outlet conduit of powder concentration dilution module directly is connected with the tubular type measuring section, the outlet conduit of tubular type measuring section has constituted the outlet of this module, link to each other the coaxial both sides that are installed in the tubular type measuring section of Laser emission end and transmitted light receiving end with the inlet duct of sample loopback module.The second cleaning fluid pipeline, one end links to each other with source of clean fluid, and the other end is connected with linkage section on the tubular type measuring section with Laser emission end, transmitted light receiving end respectively.The signal wire of drawing on Laser emission end and the transmitted light receiving end together is input to computing circuit, and computing circuit outlet line one tunnel connects with the concentration signal circuit, and another road is input to the A/D change-over circuit.
Laser emission end and transmitted light receiving end are installed in the both sides of tubular type measuring section respectively, when the powder particle passes through the tubular type measuring section with suitable concentration, the parallel beam that the Laser emission end-fire goes out passes through the powder particle, received by the transmitted light receiving end, the reference optical signal of this optical signal transmissive and Laser emission end transforms through photoelectricity, be input to computing circuit together and discuss computing, composite signal does not singly contain calculating powder grain diameter information needed, reflects the concentration of tested powder simultaneously yet.This composite signal is divided into two-way: the one tunnel through importing computing machine behind the A/D change-over circuit, is used to calculate the powder particle grain size; Another road outputs to powder concentration dilution module as control signal by the concentration signal circuit, and the flow control valve in the powder concentration dilution module is according to the flow of this Signal Regulation cleaning fluid, thus powder concentration in the control tubular type measuring section.The second cleaning fluid pipeline is introduced cleaning fluid respectively in Laser emission end and the cavity of transmitted light receiving end with tubular type measuring section linkage section, thereby cleaning fluid is discharged to the tubular type measuring section from here and is formed jet, play the effect that the powder particle is isolated with optical window, prevent that the powder material from polluting surface optical device, reduce its negative effect surveying work by the effluxvelocity of controlling cleaning fluid.
The sample loopback module is made up of conveyance conduit and discharge pump, and conveyance conduit one end is connected with the tubular type measuring section of powder particle size optical measurement module, and the other end is connected on the production line according to the concrete condition of production, and the discharge pump cross-over connection therebetween.The effect of sample loopback module is that sample is transmitted back to powder production line inside again, prevents that the powder particle is to surrounding environment and the possible pollution of equipment.Discharge pump provides necessary power, makes the smooth loopback of the sample that tests go into production line.
Cleaning fluid means that powder scatters optical clear fluid media (medium) wherein, pure, and source of clean fluid is the source that can provide or produce this fluid, as the instrument airduct road on the industrial production line, the liquid flux jar in the chemical reaction etc.Source of clean fluid is connected with powder particle size optical measurement module with powder concentration dilution module by pipeline, is provided for diluting the fluid of tested granule density and protection optical device.
Computing machine is connected with two bars circuits, and the one, the A/D change-over circuit incoming line of powder particle optical measurement module, another is the particle diameter signal output apparatus.Computing machine simultaneously according to the production run requirement, is converted into specified standard signal with the powder grain diameter that obtains according to the particle diameter of input signal calculating powder, by the output of particle diameter signal output apparatus, uses for other production divisions.
The concentration that the present invention has adopted powder concentration dilution module to dilute the powder sample automatically, make surveying work in real time, automatically regulate powder concentration in the tubular type measuring section, thereby have the characteristics of the extremely dense thick complicated stream shape polyphasic flow of measurement according to concentration change situation in the production run; Monitoring target is wide, no matter is gas-solid flow and liquid-solid stream, as long as pass through medium (gas phase or the liquid phase) optical clear of pipeline transportation powder, with regard to available the invention process monitoring; It is wide to survey particle size range, can change the optical measuring device of different measuring scope according to the condition of production, changes monitoring system and can survey particle size range; Real-time is good, because native system is directly installed on the powder production line, can reflect the situation of change of powder particle size in the production run at any time, and live signal can be provided; Easy to use, system can utilize the thieff hatch on the existing production line basically, need not production line is adjusted greatly and can be come into operation; Do not relate to potential hazards such as radioelement and high voltage, safe in utilization; Low to environmental requirement, utilize optical signal transmissive as the measuring-signal source, light hole can be done very for a short time, helps the protection of monitoring system self.
Description of drawings
Fig. 1 structural representation of the present invention
Tubular type measuring section, Laser emission end, transmitted light receiving end and cleaning fluid access diagram in Fig. 2 powder particle size optical measurement of the present invention module
The positive view of Laser emission end in Fig. 3 powder particle size optical measurement of the present invention module
The sectional view of Laser emission end in Fig. 4 powder particle size optical measurement of the present invention module
The front section view of transmitted light receiving end in Fig. 5 powder particle size optical measurement of the present invention module
Embodiment
As Fig. 1-shown in Figure 5, the present invention includes: isokinetic sampling's module 1, powder concentration dilution module 2, powder particle size optical measurement module 3, sample loopback module 4, source of clean fluid 5, computing machine 6, particle diameter signal output apparatus 7 automatically.Its annexation is: isokinetic sampling's module 1 one ends are connected to the powder production equipment automatically, the other end links to each other with the inlet duct of powder concentration dilution module 2, the outlet conduit of powder concentration dilution module 2 links to each other with the inlet end pipeline of powder particle size optical measurement module 3, the outlet conduit of powder particle size optical measurement module 3 is connected by pipeline with sample loopback module 4, the endpiece pipeline of sample loopback module 4 is connected to the powder production equipment, source of clean fluid 5 is connected with powder particle optical measurement module 3 with powder concentration dilution module 2 by pipeline, powder particle optical measurement module 3 links to each other with computing machine 6 with powder concentration dilution module 2 by circuit, and computing machine 6 links to each other with particle diameter signal output apparatus 7.
Automatically isokinetic sampling's module 1 by the isokinetic sampling manage 8, minute-pressure transmitter 9, power amplifier 10, vacuum pump 11 form.The isokinetic sampling manages 8 and directly is connected with vacuum pump 11, pressure transducer on the minute-pressure transmitter 9 links to each other with the pressure tap on constant speed sampling pipe 8 inside and outside walls, minute-pressure transmitter 9 standard electric signal output apparatus directly link to each other with power amplifier 10, the output of power amplifier 10 is connected vacuum pump 11, and the outlet conduit of vacuum pump 11 has constituted the outlet of automatic isokinetic sampling's module 1.The isokinetic sampling manages and has pressure tap 12 on 8 inside and outside walls, and these two pressure are delivered to respectively in the minute-pressure transmitter 9, and when sampling was carried out under isokinetic conditions, the pressure that two baroports inside and outside the isokinetic sampling manages record equated, otherwise has pressure reduction.Minute-pressure transmitter 9 is converted to the standard electric signal with the differential static pressure that non-isokinetic sampling's process produces, this electric signal drives power amplifier 10 as control signal, drive vacuum pump 11 duties, change vacuum tightness in the pipeline with this, the adjusting isokinetic sampling manages the flowing velocity of 8 inner fluids, realizes the isokinetic sampling.Send into powder concentration dilution module 2 by the powder sample that automatic isokinetic sampling's module 1 is gathered by connecting tube.
Powder concentration dilution module 2 is made up of flow control valve 13, sample delivery pipeline 14, the first cleaning fluid pipeline 15, mixing tube 16.Sample delivery pipeline 14 front ends are connected with the outlet conduit of automatic isokinetic sampling's module 1, and the other end connects with mixing tube 16, and the end of mixing tube 16 has constituted the outlet of this module.The first cleaning fluid pipeline 15 is connecting source of clean fluid 5 and mixing tube 16, and this ducted cleaning fluid flow is by variable valve 13 controls, and control signal is imported by lead by powder particle size optical measurement module 3.Sample delivery pipeline 14 powder samples are introduced in the mixing tube 16; The first cleaning fluid pipeline 15 links to each other with source of clean fluid 5, the other end communicates with mixing tube 16 through flow control valve 13, sample and cleaning fluid fully mix in mixing tube 16, are admitted to the tubular type measuring section 17 of powder particle size optical measurement module 3 after the reunion of eliminating powder.Flow control valve 13 makes the cleaning fluid flow that flows into from source of clean fluid 5 satisfy the requirement of measuring the sample concentration dilution according to its aperture of signal controlling that concentration signal circuit 23 in the powder particle size optical measurement module 3 provides.
Powder particle size optical measurement module 3 is made up of tubular type measuring section 17, Laser emission end 18, transmitted light receiving end 19, the second cleaning fluid pipeline 20, computing circuit 21, A/D change-over circuit 22, concentration signal circuit 23.17 imports of tubular type measuring section directly connect with the outlet conduit of powder concentration dilution module 2, the outlet conduit of this module of export mixes of tubular type measuring section 17, Laser emission end 18 and the transmitted light receiving end 19 coaxial import of tubular type measuring section 17 and the both sides between the outlet of being installed in, the second cleaning fluid pipeline 20 is connecting source of clean fluid 5 and Laser emission end 18, on the transition section of transmitted light receiving end 19 and tubular type measuring section 17 junctions, all there is photosignal to be input to computing circuit 21 on Laser emission end 18 and the transmitted light receiving end 19 by lead, computing circuit 21 outlet lines one tunnel connect with concentration signal circuit 23, and another road is input to A/D change-over circuit 22.
Tubular type measuring section 17 is connected with the mixing tube 16 of powder concentration dilution module 2, and well-mixed powder is measured herein.Coaxial aperture 26 is offered in the both sides at tubular type measuring section 17 middle parts, the dead in line of this coaxial aperture 26 and be positioned at the xsect of measuring section pipeline.Laser emission end 18 and transmitted light receiving end 19 are installed on the tubular type measuring section 17 by screw thread respectively, the laser beam that Laser emission end 18 sends enters transmitted light receiving end 19 after via hole 26 passes through the powder two-phase flow, transmitted light is received and exports with the form of electric signal; All there are opto-electronic conversion and amplifying circuit thereof in Laser emission end 18 and transmitted light receiving end 19 inside, the light signal that they receive and change is input to computing circuit 21 via lead and discusss computing, composite signal after the computing is divided into two-way, one tunnel input A/D change-over circuit 22 carries out analog to digital conversion, digital signal input computing machine 6 after the conversion is handled, and calculates the powder grain diameter; Another road signal is transported to powder concentration dilution module 2 by concentration signal circuit 23 as control signal.On the pipe fitting of connection Laser emission end 18 on the tubular type measuring section 17 and delustring receiving end 19, cleaning fluid passage 20 is arranged; this pipeline is connected with source of clean fluid 5; cleaning fluid wherein flow into measuring section by hole 26 and forms jet; this jet is used for preventing that powder from entering Laser emission end 18 or transmitted light receiving end 19 by hole 26; with protection measuring system surface optical device; with Laser emission end 18 or transmitted light receiving end 19 junctions; isolate cleaning fluids with seal glass 27, it only can be from the hole on the tubular type measuring section 26 be flowed out.
Transmitted light receiving end 19 is made up of convex lens 39, diaphragm 40, walking regulating device 41, photelectric receiver 42, amplifying circuit 43, packaging body 44, and its connected mode is: convex lens 39, diaphragm 40, walking regulating device 41, photelectric receiver 42, amplifying circuit 43 are encapsulated in packaging body 44 inside; Convex lens 39 are fixed on the packaging body 44, diaphragm 40 is fixed on the walking regulating device 41, the distance that convex lens 39 and diaphragm are 40 equals the focal length of convex lens, finish adjusting on the one dimension direction by walking regulating device 41, cooperate with Laser emission end 18 like this, can planar finish the adjusting work that focused beam receives; Photelectric receiver 42 is installed in after the diaphragm 40, be not received by the light of particle scattering guaranteeing, by the photosignal of the amplification of amplifying circuit 43 via outside the lead output packaging body 44.
Sample loopback module 4 is made up of conveyance conduit 24 and discharge pump 25, its connected mode is: the input end of conveyance conduit 24 is connected with the tubular type measuring section 17 of powder particle size optical measurement module 3, output terminal then is connected on the production line according to the condition of production, also can be directly connected on the powder tripping device and collect; Discharge pump 25 process for this reason provides power.
Source of clean fluid 5 according to circumstances can be pure medium reservoir or a transport pipeline on the production line, also can be special container.There are two groups of pipelines to be connected with powder concentration dilution module 2, powder particle size optical measurement module 3 respectively on it, are used to dilute powder and provide protection for the optical measurement module.
Particle diameter signal output apparatus 7 is open ports of the present invention, and it provides the electric signal of normalized powder particle size size, can use for administrative authority and production line control system.
Provide following examples in conjunction with content of the present invention:
According to external relevant, 1% of the annual generated energy in the whole world is used to cement, has consumed a large amount of electric power thus.It is not only relevant with the chemistry of cement composition to study surperficial concrete strength, and the cement granules particle diameter also has decisive action to a certain extent to concrete strength, if the particle diameter of cement is less than 3 microns, because hydration is very fast, they are to not contribution of concrete strength; And for the cement granules of particle diameter greater than 30 microns, it descends rapidly to the contribution of the concrete strength increase along with particle diameter, only plays filler effect during greater than 60 microns, so in the manufacture of cement grinding is had certain requirement.If can grind situation according to grog at any time in the production run, adjust in good time and grind the production line situation, the particle diameter of cement granules is kept in the reasonable scope, not only can improve concrete intensity, can also reduce the energy consumption of grinding production line.
The present invention can be used for the cement clinker process of lapping is monitored, and embodiment is as follows:
In the cement process, cement granules is dispersed in the air, and the source of clean fluid of monitoring system can utilize the pressurized air in the cement mill to obtain through clarifier.Exit at the production line muller, at former thief hatch sampling probe of the present invention is installed, automatically isokinetic sampling's module is managed the vacuum tightness that the differential static pressure of inside and outside wall is regulated vacuum pump automatically according to the isokinetic sampling, realize the isokinetic sampling, the cement granules sample of gathering enters powder concentration dilution system via pipeline, the transmitted light information that provides according to powder particle size optical measurement module, flow control valve is by the flow of control cleaning compressed air, the dilution sample is to appropriate concentration, and such sample is sent in the optical measuring system; Sample is sent into cement producing line by send-back system after finishing surveying work, finishes surveying work.Computing machine receives composite signal, the cement granules particle diameter that calculates, and according to the particle diameter situation, measurement result is quantified as the particle diameter control signal of standard according to the setting of producer, this signal is by the output of particle diameter signal output apparatus, use for administrative authority, or as the reference signal of grinding control system.
Claims (6)
1, a kind of high cencentration powder on-line grain size optical monitoring system, comprise: powder particle size optical measurement module (3), source of clean fluid (5), computing machine (6), it is characterized in that also comprising: automatic isokinetic sampling's module (1), powder concentration dilution module (2), sample loopback module (4) and particle diameter signal output apparatus (7), automatically isokinetic sampling's module (1) one end is connected to the powder production equipment, the other end links to each other with the inlet duct of powder concentration dilution module (2), the outlet conduit of powder concentration dilution module (2) links to each other with the inlet end pipeline of powder particle size optical measurement module (3), the outlet conduit of powder particle size optical measurement module (3) is connected by pipeline with sample loopback module (4), the endpiece pipeline of sample loopback module (4) is connected to the powder production equipment, source of clean fluid (5) is connected with powder particle size optical measurement module (3) with powder concentration dilution module (2) by pipeline, powder particle size optical measurement module (3) links to each other with computing machine (6) with powder concentration dilution module (2) by circuit, and computing machine (6) links to each other with particle diameter signal output apparatus (7).
2, high cencentration powder on-line grain size optical monitoring system according to claim 1, it is characterized in that, automatically isokinetic sampling's module (1) is by isokinetic sampling's pipe (8), minute-pressure transmitter (9), power amplifier (10), vacuum pump (11) is formed, isokinetic sampling's pipe (8) directly is connected with vacuum pump (11), pressure transducer on the minute-pressure transmitter (9) links to each other with the pressure tap on constant speed sampling pipe (8) inside and outside wall, the direct same power amplifier of minute-pressure transmitter (9) standard electric signal output apparatus (10) links to each other, the output of power amplifier (10) is connected vacuum pump (11), and the outlet conduit of vacuum pump (11) has constituted the outlet of automatic isokinetic sampling's module (1).
3, high cencentration powder on-line grain size optical monitoring system according to claim 1, it is characterized in that, powder concentration dilution module (2) is by flow control valve (13), sample delivery pipeline (14), the first cleaning fluid pipeline (15), mixing tube (16) is formed, sample delivery pipeline (14) front end is connected with the outlet conduit of automatic isokinetic sampling's module (1), the same mixing tube of the other end (16) connects, the end of mixing tube (16) has constituted the outlet of this module, the first same source of clean fluid of cleaning fluid pipeline (15) (5) links to each other, and the other end communicates through the same mixing tube of flow control valve (13) (16).
4, high cencentration powder on-line grain size optical monitoring system according to claim 1, it is characterized in that, powder particle size optical measurement module (3) is by tubular type measuring section (17), Laser emission end (18), transmitted light receiving end (19), the second cleaning fluid pipeline (20), computing circuit (21), A/D change-over circuit (22), concentration signal circuit (23) is formed, tubular type measuring section (17) import directly connects with the outlet conduit of powder concentration dilution module (2), the coaxial import of tubular type measuring section (17) and the both sides between the outlet of being arranged on of Laser emission end (18) and transmitted light receiving end (19), the second cleaning fluid pipeline (20) is connecting source of clean fluid (5) and Laser emission end (18), the front end of transmitted light receiving end (19), all there is photosignal to be input to computing circuit (21) on Laser emission end (18) and the transmitted light receiving end (19) by lead, computing circuit (21) outlet line one tunnel connects with concentration signal circuit (23), concentration signal circuit (23) is sent into powder concentration dilution module (2) with powder concentration electric signal as control signal, another road is input to A/D change-over circuit (22), digital signal input computing machine (6) from A/D change-over circuit (22) output is used to calculate the powder grain diameter.
5, high cencentration powder on-line grain size optical monitoring system according to claim 4, it is characterized in that, coaxial aperture (26) is offered in the both sides at tubular type measuring section (17) middle part, this coaxial aperture (26) axis is positioned at the xsect of measuring section pipeline, Laser emission end (18) and transmitted light receiving end (19) are separately positioned on the both sides of aperture (26), in aperture (26) and Laser emission end (18) or transmitted light receiving end (19) junction, seal glass (27) is installed.
6, high cencentration powder on-line grain size optical monitoring system according to claim 4, it is characterized in that, described powder particle size optical measurement module (3), sample loopback module (4) is made up of conveyance conduit (24) and discharge pump (25), its connected mode is: the input end of conveyance conduit (24) is connected with the tubular type measuring section (17) of powder particle size optical measurement module (3), the other end is connected on the production line, and discharge pump (25) cross-over connection therebetween.
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| CN 200410067143 CN1272620C (en) | 2004-10-14 | 2004-10-14 | High cencentration powder on-line grain size optical monitoring system |
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| CN 200410067143 CN1272620C (en) | 2004-10-14 | 2004-10-14 | High cencentration powder on-line grain size optical monitoring system |
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| CN105181537A (en) * | 2015-09-30 | 2015-12-23 | 丹东百特仪器有限公司 | Online laser particle size monitoring system and control method thereof |
| CA3003420C (en) * | 2015-12-29 | 2020-07-14 | Halliburton Energy Services, Inc. | Optical computing devices for measurement in custody transfer of pipelines |
| CN107202749A (en) * | 2017-05-16 | 2017-09-26 | 西安科技大学 | Mine Dust granule density and grain diameter measurement system |
| CN110879194B (en) * | 2019-12-16 | 2022-08-23 | 深圳市龙岗大工业区混凝土有限公司 | Fineness detection device of concrete aggregate |
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