CN104330380A - Sample collection and preparation device for collecting near infrared spectrum of coal powder on line - Google Patents
Sample collection and preparation device for collecting near infrared spectrum of coal powder on line Download PDFInfo
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- CN104330380A CN104330380A CN201410555355.7A CN201410555355A CN104330380A CN 104330380 A CN104330380 A CN 104330380A CN 201410555355 A CN201410555355 A CN 201410555355A CN 104330380 A CN104330380 A CN 104330380A
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Abstract
The invention discloses a sample collection and preparation device for collecting a near infrared spectrum of coal powder on line. The sample collection and preparation device comprises a shell box body, a sample processing unit assembled in the shell box body and a system control unit. The defect that relevant equipment is easily affected by relevant factors such as the compactness, temperature and surface flatness of a material when collecting the near infrared spectrum of a powdered substance is overcome. The sample collection and preparation device is characterized in that a pressure sensor is mounted on a sample collection pipe in the sample processing unit; an approach temperature sensor, a sapphire window and a near infrared standard reference plate are mounted on a coal powder sample preparation device; the coal powder temperature is automatically adjusted by the system control unit by controlling the cold air amount, and the coal powder compactness is automatically adjusted by controlling the pressure difference between compressed air and a coal powder pipeline; furthermore, the device also has a function of automatically catching outside samples. Compared with a product of the same type, the sample collection and preparation device is reasonable in structural design, and can be used for obviously improving the repetitiveness and stability of near infrared spectrum collection and thus ensuring the accuracy of on-line near infrared coal quality detection.
Description
Technical field
The present invention relates to a kind of sampling sample preparation device for gathering coal dust near infrared spectrum on a production line, particularly one has control coal dust sampling packing, temperature, surface smoothness automatically, there is the on-line period sample preparation device of automatic calibration, the automatic capturing model out-of-bounds function such as sample, also can be used for powder near infrared spectrum or other spectrum such as online acquisition flour, milk powder and animal feed.
Background technology
Near infrared spectrum is the absorption spectrum frequently produced by frequency multiplication and combination, and its wavelength range of definition is 780nm ~ 2500nm.Because this technology has, measuring speed is fast, testing efficiency is high, analysis cost is low, without the need to plurality of advantages such as damaged sample, cleanliness without any pollution, so since the nineties in 20th century, be used widely in the process analysis procedure analysis projects such as agricultural, industry, food, pharmacy, petrochemical industry.
Generally speaking, near-infrared spectrum technique, when detecting some fluids, needs constantly to take out sample from production line according to certain requirement, and after corresponding pre-service, just can be further analyzed.Relative to liquid, the sampling sample preparation difficulty of solid-state flour is larger.At present, the method for online acquisition granular material near infrared spectrum mainly contains: the first, direct probe method.As in " Korea S's Journal of Chemical Industry and Engineering (Korean J. Chem. Eng) " (the 2nd phase in 2009, 26th volume, 489-495 page) on the name delivered be called " application near-infrared diffuse reflection spectrum carries out online ature of coal measurement (Application of near infrared diffuse reflectance spectroscopy for on-line measurement of coal properties) ", and the name of Chinese utility model patent CN200820012725.2 is called that " near infrared ature of coal on-line checkingi analyser " and the name of Chinese utility model patent CN201120308336.6 are called " near infrared coal dust moisture on-line measurement mechanism ", involved is a kind of so just directly by receiving the device of the near infrared spectrum that measured object returns on production line.The second, screw rod method.Name as BrP 2142721A is called " a kind of mounting means (An arrangement in infrared analyzers) of near-infrared analyzer " and the name of Chinese patent is called " the NIR On-line Measuring Method of food in bulk and equipment ", involved so just one utilizes screw rod by material bypass to stopple coupon, is then obtained the device of granular material near infrared spectrum by the near infrared online measurement mechanism be arranged on outside stopple coupon.3rd, cyclone separator method.Name as Chinese utility model patent CN200720031421.6 is called " Dual-Phrase Distribution of Gas olid multiple tracks constant speed automatically sample division and polycomponent real-time analysis device ", coal dust samples by involved a kind of so just cyclone separator by being arranged on two-phase flow gas-solid pipeline side, and after crawler belt sample preparation, then obtain the device of coal dust near infrared spectrum by being arranged on the coal dust near infrared online analyzer transmitted above crawler belt.
Although some method above-mentioned puts into operation in actual production, but consider the compressibility of pressed powder, and its temperature, surface smoothness etc. are when affecting the key factor of near infrared spectrum repeatability, these methods will certainly introduce certain error, particularly stricter online qualitative and quantitative analysis is required for precision of prediction, the judgement of mistake obviously will reduce production efficiency, even causes serious safety consequences.
Summary of the invention
The object of this invention is to provide a kind of sampling sample preparation device for gathering coal dust near infrared spectrum on a production line, it overcomes the existing shortcoming having relevant device to be vulnerable to the related factors such as material compacting degree, temperature, surface smoothness when gathering powder near infrared spectrum, it compared with similar products, not only reasonable in design, and collection near infrared spectrum repeatability and stability can be significantly improved, thus ensure the accuracy of near infrared ature of coal on-line checkingi.
The technical solution adopted in the present invention is: this sampling sample preparation device being used for online acquisition coal dust near infrared spectrum comprises container body of outer cover, be assembled in the sample preparation unit in container body of outer cover and system control unit, its technical essential is: described container body of outer cover is made up of casing, box cabinet door, box cabinet door switch, and it is arranged near as-fired coal powder pipeline, and be connected with as-fired coal powder pipeline by blast pipe, sampling pipe.
In described sample preparation unit, blast pipe is provided with one end insertion as-fired coal powder pipeline of pressure transducer, and one end is connected to the first electrically operated valve in addition; Negtive-pressure implement has three interfaces, is connected with the first electrically operated valve, the first electric voltage regulator, the second electrically operated valve respectively by connecting tube; First electric voltage regulator is connected by a three-way pipeline interface with the second electric voltage regulator, and introduces pressurized air from the remaining interface of this three-way pipeline; 6th electrically operated valve is connected to the second electric voltage regulator respectively by pipeline, the first coal dust persists storehouse draft tube, the second coal dust persists storehouse draft tube; Cyclone separator has three interfaces, the upper end interface that powder falling mouth and first coal dust of its lower end persist storehouse is connected, the exhausr port of its upper end is connected with the second electrically operated valve by pipeline, and its air intake opening is connected with the 3rd electrically operated valve, the 4th electrically operated valve, the 5th electrically operated valve by pipeline; The lower end interface of the 5th electrically operated valve is connected to that the first coal dust persists storehouse escape pipe, the second coal dust persists storehouse escape pipe; The lower end interface that upper end interface and first coal dust of sample preparation device persist storehouse is connected, and the upper end interface that lower end interface and second coal dust of sample preparation device persist storehouse is connected; As-fired coal powder pipeline is inserted in sampling pipe one end, and the other end is connected with the 3rd electrically operated valve.
In described sample preparation unit, coal dust sample preparation device rear end is provided with coal dust sample preparation device stepper motor, and this stepping motor rotating shaft is set with can around the rearmounted panel of coal dust sample preparation device of its synchronous rotary, the solid interlayer of coal dust sample preparation device first, the solid interlayer of coal dust sample preparation device second, the solid interlayer of coal dust sample preparation device the 3rd, the hollow interlayer of coal dust sample preparation device and coal dust sample preparation device front panel, wherein, coal dust sample preparation device front panel and the rearmounted panel parallel of coal dust sample preparation device are installed, the solid interlayer of coal dust sample preparation device first, the solid interlayer of coal dust sample preparation device second, the solid interlayer of coal dust sample preparation device the 3rd, the hollow interlayer of coal dust sample preparation device is level fan cylinder, and the solid interlayer of coal dust sample preparation device first, the solid interlayer of coal dust sample preparation device the 3rd and the hollow interlayer similar shape of coal dust sample preparation device, their sector crosssection central angle is 45 °, the sector crosssection central angle being provided with the solid interlayer of coal dust sample preparation device second of near infrared standard reference plate in close this side of coal dust sample preparation device front panel is 135 °, the outside of coal dust sample preparation device front panel installs the first sapphire window according to 90 ° of angles with circumference, second sapphire window, 3rd sapphire window, 4th sapphire window, and ensure the first sapphire window just to and be close near infrared standard reference plate, second sapphire window is just to the dead slot between the solid interlayer of coal dust sample preparation device second and the solid interlayer of coal dust sample preparation device the 3rd, to the hollow interlayer of coal dust sample preparation device, 3rd sapphire window just ensures that light can inject its inside, 4th sapphire window is just to the dead slot between the solid interlayer of coal dust sample preparation device first and the solid interlayer of coal dust sample preparation device second, the center pit of coal dust sample preparation device front panel is sleeved on coal dust sample preparation device stepping motor rotating shaft.
In described sample preparation unit, the first coal dust persists in storehouse and is provided with temperature sensor, and its exit, lower end is provided with the first coal dust persists storehouse electrically operated valve.
In described sample preparation unit, the second coal dust persists in storehouse and leaves the controlled pressurized air gas orifice of two start and stop near coal dust sample preparation device front panel side, and its exit, lower end is provided with the second coal dust and persists storehouse electrically operated valve; Its exit lower end is placed with some sample storage bottles simultaneously, and these sample storage bottles are equidistantly put on stepping crawler belt, and stepping crawler belt is driven by stepping crawler belt roller bearing.
Pressure transducer controller in described system control unit, temperature sensor controller are connected to industrial control computer respectively by connecting line A, connecting line B, be interconnected by corresponding line and pressure transducer controller near the venthole that pressure transducer is arranged on blast pipe, be arranged on the temperature sensor that the first coal dust persists in storehouse and be interconnected by corresponding line and temperature sensor controller; The scanning window of near infrared spectrometer just to the sapphire window on the right side of coal dust sample preparation device front panel, and is interconnected by connecting line C and industrial control computer; Industrial control computer is connected to electromechanical valve actuator, electric voltage regulator driver, stepping crawler belt roller motor driver, sample preparation device stepper motor driver respectively by connecting line D, connecting line E, connecting line F, connecting line G; Electromechanical valve actuator, electric voltage regulator driver, stepping crawler belt roller motor driver, sample preparation device stepper motor driver are interconnected to the 6th electrically operated valve, the first and second electric voltage regulator, stepping crawler belt roller motor, sample preparation device stepper motor by corresponding line respectively with the first.
The advantage that the present invention has and good effect are: first, because blast pipe of the present invention is provided with pressure transducer, by the automatic adjustment of the industrial control computer in its system control unit to the first electric pressure-regulating valve, the wind speed entered in cyclone separator can be made substantially to remain unchanged, thus make the coal dust separated fall into the first coal dust uniformly to persist in storehouse, so just ensure to gather the packing of coal dust suitable; Second, consider the change of temperature in pulverized coal channel, cold wind introduced by the sampling pipe of the present invention in sample preparation unit freeze, the size of its cold blast rate is determined automatically adjusting of the 4th electrically operated valve by the industrial control computer in system control unit, overcomes the temperature factor affecting coal dust near infrared spectrum repeatability like this; 3rd, coal dust sample preparation device of the present invention is provided with sapphire window, when each collection is close to the near infrared spectrum of coal dust on this window, because its surface smoothness is suitable, thus ensures that spectrum repeatability is higher; 4th, owing to being filled with standard coal dust in the hollow interlayer of coal dust sample preparation device in coal dust sample preparation device of the present invention, gathering and analyze the near infrared spectrum of this standard coal dust, can self-checking function be realized, make assessment to the duty of device further, handled easily personnel safeguard it; 5th, the present invention, under the cooperation of industrial control computer and near infrared spectrometer, finds out-of-bounds can utilize stepping crawler belt and this sample of sample storage bottle automatic capturing after sample, thus is convenient to expand model, online coal property test adaptability is improved further.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is a kind of sample preparation cellular construction schematic diagram of the present invention.
Fig. 2 is the decomposition texture schematic diagram of a kind of coal dust sample preparation device in Fig. 1, wherein Fig. 2 (a) is a kind of coal dust sample preparation device structural representation removing the solid interlayer of coal dust sample preparation device and the hollow interlayer of coal dust sample preparation device, Fig. 2 (b) is a kind of coal dust sample preparation device front panel structural representation, the 3-D view that Fig. 2 (c) is the solid interlayer of a kind of coal dust sample preparation device and hollow closed interlayer, the front view that Fig. 2 (d) is the solid interlayer of a kind of coal dust sample preparation device and the hollow interlayer of coal dust sample preparation device.
Fig. 3 is the structural representation that a kind of second coal dust in Fig. 1 persists storehouse.
Fig. 4 is a kind of system control unit structural representation of the present invention.
Fig. 5 is a kind of container body of outer cover structural representation of the present invention.
In figure, sequence number illustrates: 1 as-fired coal powder pipeline, 2 blast pipes, 3 first electrically operated valves, 4 the 3rd electrically operated valves, 5 negtive-pressure implements, 6 second electrically operated valves, 7 cyclone separators, 8 first electric voltage regulator, 9 second electric voltage regulator, 10 the 6th electrically operated valves, 11 stepping crawler belt roller bearings, 12 stepping crawler belts, 13 first coal dusts persist storehouse, 14 second coal dusts persist storehouse, 15 coal dust sample preparation devices, 16 the 5th electrically operated valves, 17 the 4th electrically operated valves, 18 sample storage bottles, 19 sampling pipes, 20 pressure transducers, 21 first coal dusts persist storehouse escape pipe, 22 first coal dusts persist storehouse electrically operated valve, 23 temperature sensors, 24 first coal dusts persist storehouse draft tube, 25 coal dust sample preparation device stepping motor rotating shafts, 26 coal dust sample preparation device stepper motors, 27 coal dust sample preparation device front panel, 28 first sapphire windows, 29 second sapphire windows, 30 the 3rd sapphire windows, 31 the 4th sapphire windows, 32 coal dust sample preparation device front panel center pits, the rearmounted panel of 33 coal dust sample preparation device, the solid interlayer of 34 coal dust sample preparation device first, the solid interlayer of 35 coal dust sample preparation device second, 36 near infrared standard reference plates, the solid interlayer of 37 coal dust sample preparation device the 3rd, the hollow interlayer of 38 coal dust sample preparation device, 39 second coal dusts persist storehouse escape pipe, 40 second coal dusts persist storehouse electrically operated valve, 41 second coal dusts persist storehouse draft tube, 42 controlled compression aerojet holes, 43 pressure transducer controllers, 44 industrial control computers, 45 near infrared spectrometers, 46 electromechanical valve actuators, 47 electric voltage regulator drivers, 48 stepping crawler belt roller motor drivers, 49 sample preparation device stepper motor drivers, 50 temperature sensor controllers, 51 casings, 52 box cabinet door switch, 53 box cabinet doors, 54 pressurized air, 55 cold wind, 56 pulverized coal flows to.
Embodiment
Concrete structure of the present invention and the course of work is described in detail according to Fig. 1 ~ 5.
This sampling sample preparation device comprises sample preparation unit, system control unit and container body of outer cover.
Being arranged on container body of outer cover inside supplies the sample preparation unit of the coal dust sample of near infrared spectrometer 45 scanning to comprise blast pipe 2 for fetching from as-fired coal powder pipeline 1 and making, sampling pipe 19, first electrically operated valve 3, second electrically operated valve 6, 3rd electrically operated valve 4, 4th electrically operated valve 17, 5th electrically operated valve 16, 6th electrically operated valve 10, negtive-pressure implement 5, cyclone separator 7, first electric voltage regulator 8, second electric voltage regulator 9, stepping crawler belt roller bearing 11, stepping crawler belt 12, first coal dust persists storehouse 13, second coal dust persists storehouse 14, coal dust sample preparation device 15, sample storage bottle 18 is connected the pipeline of all parts with some.Wherein, coal dust sample preparation device 15 comprises the parts such as coal dust sample preparation device stepping motor rotating shaft 25, coal dust sample preparation device front panel 27, first sapphire window 28, second sapphire window 29, the 3rd sapphire window 30, the 4th sapphire window 31, the rearmounted panel of coal dust sample preparation device 33, the solid interlayer of coal dust sample preparation device first 34, the solid interlayer of coal dust sample preparation device second 35, near infrared standard reference plate 36, the solid interlayer 37 of coal dust sample preparation device the 3rd, the hollow interlayer 38 of coal dust sample preparation device.Wherein near infrared standard reference plate 36 can be formed with the standard diffuse reflectance reference white plate of Spectralon material; The hollow interlayer 38 of coal dust sample preparation device fills full certified reference coal, as country is numbered the bituminous coal of GSB06-2116-2007.
Be arranged on the inner system control unit for the co-ordination of Quality control processing unit of container body of outer cover and comprise pressure transducer controller 43, industrial control computer 44, near infrared spectrometer 45, electromechanical valve actuator 46, electric voltage regulator driver 47, stepping crawler belt roller motor driver 48, sample preparation device stepper motor driver 49, temperature sensor controller 50 and the parts such as interconnective line between industrial control computer 44 and other parts.Wherein, pressure transducer controller 43 can be formed with pressure unit general on general industry; Industrial control computer 44 can be made up of general industrial control computer; Near infrared spectrometer 45 can be made up of the near infrared spectrometer of applicable work on the spot, as AvaSpec-NIR25-2.5 is formed; Temperature sensor controller 50 is made up of temperature transmitter general on general industry.
Container body of outer cover for the protection of device internal unit comprises the parts such as casing 51, box cabinet door switch 52, box cabinet door 53.
In sample preparation unit, blast pipe 2 is provided with one end insertion as-fired coal powder pipeline 1 of pressure transducer 20, and one end is connected to the first electrically operated valve 3 in addition; Negtive-pressure implement 5 has three interfaces, is connected 6 respectively by connecting tube with the first electrically operated valve 3, first electric voltage regulator 8, second electrically operated valve; First electric voltage regulator 8 is connected by a three-way pipeline interface with the second electric voltage regulator 9, and the remaining interface of this three-way pipeline introduces pressurized air 54; 6th electrically operated valve 10 is connected to the second electric voltage regulator 9, first coal dust respectively by pipeline and persists storehouse draft tube 24, second coal dust and persist storehouse draft tube 41; Cyclone separator 7 has three interfaces, the upper end interface that powder falling mouth and first coal dust of its lower end persist storehouse 13 is connected, the exhausr port of its upper end is connected with the second electrically operated valve 6 by pipeline, and its air intake opening is connected with the 3rd electrically operated valve 4, the 4th electrically operated valve 17, the 5th electrically operated valve 16 by pipeline; The lower end interface of the 5th electrically operated valve 16 is connected to the first coal dust and persists storehouse escape pipe 21, second coal dust and persist storehouse escape pipe 39; The lower end interface that upper end interface and first coal dust of sample preparation device 15 persist storehouse 13 is connected, and the upper end interface that lower end interface and second coal dust of sample preparation device 15 persist storehouse 14 is connected; As-fired coal powder pipeline 1 is inserted in sampling pipe 19 one end, and the other end is connected with the 3rd electrically operated valve 4.Wherein, pressure transducer 20 can be made up of, as P51 pressure transducer the sensor of the measuring channel gaseous tension with stainless steel material.In sample preparation unit, coal dust sample preparation device 15 rear end is provided with coal dust sample preparation device stepper motor 26, and this stepping motor rotating shaft 25 is set with can around the rearmounted panel of coal dust sample preparation device 33 of its synchronous rotary, the solid interlayer of coal dust sample preparation device first 34, the solid interlayer of coal dust sample preparation device second 35, the solid interlayer 37 of coal dust sample preparation device the 3rd, the hollow interlayer 38 of coal dust sample preparation device and coal dust sample preparation device front panel 27, wherein, coal dust sample preparation device front panel 27 and the parallel installation of the rearmounted panel of coal dust sample preparation device 33, the solid interlayer 34 of coal dust sample preparation device first, the solid interlayer 35 of coal dust sample preparation device second, the solid interlayer 37 of coal dust sample preparation device the 3rd, the hollow interlayer of coal dust sample preparation device 38 is level fan cylinder, and the solid interlayer 34 of coal dust sample preparation device first, the solid interlayer 37 of coal dust sample preparation device the 3rd and coal dust sample preparation device hollow interlayer 38 similar shape, their sector crosssection central angle is 45 °, the sector crosssection central angle being provided with the solid interlayer 35 of coal dust sample preparation device second of near infrared standard reference plate 36 in close this side of coal dust sample preparation device front panel 27 is 135 °, the outside of coal dust sample preparation device front panel 27 installs the first sapphire window 28 according to 90 ° of angles with circumference, second sapphire window 29, 3rd sapphire window 30, 4th sapphire window 31, and ensure the first sapphire window 28 just to and be close near infrared standard reference plate 36, second sapphire window 29 is just to the dead slot between the solid interlayer of coal dust sample preparation device second and the solid interlayer of coal dust sample preparation device the 3rd, to the hollow interlayer 38 of coal dust sample preparation device, 3rd sapphire window 30 just ensures that light can inject its inside, 4th sapphire window 31 is just to the dead slot between the first solid interlayer and the solid interlayer of coal dust sample preparation device second, the center pit of coal dust sample preparation device front panel 27 is sleeved on coal dust sample preparation device stepping motor rotating shaft 25, the rearmounted panel 33 of coal dust sample preparation device, the solid interlayer 34 of coal dust sample preparation device first, the solid interlayer 35 of coal dust sample preparation device second, the solid interlayer 37 of coal dust sample preparation device the 3rd, the hollow interlayer 38 of coal dust sample preparation device and coal dust sample preparation device front panel 27 are when rotating around coal dust sample preparation device stepping motor rotating shaft 25, its relative position immobilizes, ensure thus between the coal dust solid interlayer 34 of sample preparation device first and the solid interlayer 35 of coal dust sample preparation device second, isopyknic dead slot is left between the solid interlayer of coal dust sample preparation device second 35 and the solid interlayer 37 of coal dust sample preparation device the 3rd, these two dead slot upper end open all can be rotated to the position just the first coal dust being persisted to storehouse electrically operated valve 22 lower ending opening.
In sample preparation unit, the first coal dust persists in storehouse 13 temperature sensor 20 being provided with and temperature in this storehouse can being transferred to industrial control computer 44, and its exit, lower end is provided with the first coal dust controlling whether sample preparation persists storehouse electrically operated valve 22.Wherein, temperature sensor 20 can be made up of, as DS18b20 temperature sensor the common temperature sensor having moisture proof, corrosion-resistant stainless steel encapsulates.In sample preparation unit, the second coal dust persists in storehouse 14 and leaves two near coal dust sample preparation device front panel 27 side for the controlled pressurized air gas orifice 42 of the start and stop of cleaning residual coal dust; Its exit, lower end is provided with the second coal dust whether control keep sample and persists storehouse electrically operated valve 40; Its exit lower end places described sample storage bottle 18 simultaneously, and sample storage bottle 18 is equidistantly put on stepping crawler belt 12, and stepping crawler belt 12 is driven by stepping crawler belt roller bearing 11.Wherein, sample storage bottle 18 can be used in laboratory the general steel cylinder formation storing granular material.
Pressure transducer controller 43 in system control unit, temperature sensor controller 50 are connected to industrial control computer 44 respectively by connecting line A, connecting line B; The scanning window of near infrared spectrometer 45 just to the sapphire window on the right side of coal dust sample preparation device front panel 27, and is interconnected by connecting line C and industrial control computer 44; Industrial control computer 44 is connected to electromechanical valve actuator 46, electric voltage regulator driver 47, stepping crawler belt roller motor driver 48, sample preparation device stepper motor driver 49 respectively by connecting line D, connecting line E, connecting line F, connecting line G.
During execute-in-place, its course of work is divided into " reference ", " sampling ", " sample preparation ", " inspection ", " purging " according to sequencing, and device also add the action of " correction ", " keeping sample " two specific uses in addition.Wherein, " reference " refer to the process of 45 pairs of near infrared standard reference plates 36 scannings of near infrared spectrometer in system control unit; " sampling " refers to that the coal dust in as-fired coal powder pipeline 1 takes out by sample preparation unit, and makes it to fall into the process that the first coal dust persists storehouse 13; " sample preparation " refers to that the coal dust that " sampling " obtains is made the process being convenient to the coal dust sample that near infrared spectrometer 45 scans by the sample preparation device 15 in sample preparation unit; " inspection " refers to that the standard coal dust of filling in the hollow interlayer 38 of near infrared spectrometer 45 pairs of coal dust sample preparation devices in system control unit scans and the process analyzed; " purging " refers to that the first coal dust is persisted the process that storehouse 13 or the second coal dust coal dust persisted in storehouse 14 blow back as-fired coal powder pipeline 1 by sample preparation unit; " correction " refers to the different operating modes that system control unit obtains according to pressure transducer 20 and temperature sensor 23, makes the process of corresponding adjustment; " keep sample " and refer to that the coal dust after " sample preparation " is put into the process of sample storage bottle 18 by system control unit.Concrete operation step is as follows:
The first step, performs " reference " action.First, sent the instruction of closing all electrically operated valves to electromechanical valve actuator 46 by connecting line D by industrial control computer 44, send reset instruction by connecting line G to sample preparation device controllor for step-by-step motor 49 again, this instruction makes the dead slot between the solid interlayer of coal dust sample preparation device first 34 and the solid interlayer 35 of coal dust sample preparation device second rotate the lower end interface position extremely just the first coal dust being persisted to storehouse 13; Then, industrial control computer 44 sends scan instruction by connecting line C near infrared spectrometer 45, because what now near infrared spectrometer 45 was just right is near infrared standard reference plate 36, so after scanning completes, industrial control computer 44 is just obtained with reference to light intensity by connecting line C.
Second step, performs " sampling " action.First, industrial control computer 44 sends " sampling " instruction by connecting line D to electromechanical valve actuator 46, this instruction makes the first electrically operated valve 3, second electrically operated valve 6, 3rd electrically operated valve 4, 4th electrically operated valve 17 and the first electric voltage regulator 8 are opened, 5th electrically operated valve 16, 6th electrically operated valve 10, second electric voltage regulator 9, first coal dust persists storehouse electrically operated valve 22 and the second coal dust and persists storehouse electrically operated valve 40 and close, and keep this state 5 minutes, so the coal dust in as-fired coal powder pipeline 1 is inhaled into sampling pipe 19, then after the 3rd electrically operated valve 4, cyclone separator 7 is entered together with the cold wind 55 entered from the 4th electrically operated valve 17, in cyclone separator 7, coal dust persists storehouse 13 because gravitate falls into the first coal dust, weary gas is successively through the second electrically operated valve 6, negtive-pressure implement 5, as-fired coal powder pipeline 1 is blown into after first electrically operated valve 3 and blast pipe 2.
While performing " sampling " action, device performs " correction " action, this action refers to: the as-fired coal powder pipeline 1 internal gas pressure intensity that industrial control computer 44 is passed back by connecting line A acquisition pressure transducer controller 43, adjustment instruction is sent to electric voltage regulator driver 47 again by connecting line E, the aperture of suitable adjustment first electric voltage regulator 8, the difference making pressurized air air pressure level and as-fired coal powder pipeline 1 internal gas pressure intensity is 0.5MPa; Simultaneously, industrial control computer 44 persists the temperature in storehouse 13 by the first coal dust that connecting line B acquisition temperature sensor controller 50 is passed back, adjustment instruction is sent to electric voltage regulator driver 47 again by connecting line E, the aperture of suitable adjustment the 4th electrically operated valve 17, makes to fall into the temperature that the first coal dust persists coal dust in storehouse 13 and maintains between 20 ~ 25 DEG C.
3rd step, performs " sample preparation " action.First, instruction is sent by connecting line D to electromechanical valve actuator 46 by industrial control computer 44, this instruction makes the first coal dust persist storehouse electrically operated valve 22 to open, other all electrically operated valve is closed, so be stored in the first coal dust to persist the dead slot that in storehouse 13, coal dust will fall between the solid interlayer of coal dust sample preparation device first 34 and the solid interlayer 35 of coal dust sample preparation device second; Then, " sample preparation " instruction is sent by connecting line G to sample preparation device stepper motor driver 49 by industrial control computer 44; This instruction makes coal dust sample preparation device stepper motor 26 turn clockwise after 90 °, and the dead slot between the solid interlayer of coal dust sample preparation device first 34 and the solid interlayer 35 of coal dust sample preparation device second rotates on the right side of coal dust sample preparation device front panel 27; Then, industrial control computer 44 sends scan instruction by connecting line C near infrared spectrometer 45, because be full of coal dust to be measured in the dead slot now between the solid interlayer of coal dust sample preparation device first 34 and the solid interlayer of coal dust sample preparation device second 35, so after having scanned, industrial control computer 44 has just obtained the near infrared spectrum data of current coal dust by connecting line C.
4th step, performs " inspection " action.First, out code is sent by connecting line D to electromechanical valve actuator 46 by industrial control computer 44, this instruction makes all electrically operated valves close, send to sample preparation device stepper motor driver 49 instruction of 90 ° of turning clockwise by connecting line G more afterwards, this instruction makes the hollow interlayer 38 of coal dust sample preparation device be on the right side of coal dust sample preparation device front panel 27, then, industrial control computer 44 sends scan instruction by connecting line C near infrared spectrometer 45, because the certified reference coal that what now near infrared spectrometer 45 was just right is in the hollow interlayer 38 of coal dust sample preparation device, so after scanning and analysis complete, industrial control computer 44 just obtains current working by connecting line C, simultaneously, Open Side Down and pour coal dust wherein into second coal dust and persist storehouse 14 for dead slot between the solid interlayer of coal dust sample preparation device first 34 and the solid interlayer 35 of coal dust sample preparation device second, dead slot opening upwards between the solid interlayer of coal dust sample preparation device second 35 and the solid interlayer 37 of coal dust sample preparation device the 3rd, be ready to perform " sample preparation " action next time.
5th step, performs " purging " action.First, out code is sent by connecting line D to electromechanical valve actuator 46 by industrial control computer 44, this instruction makes the 3rd electrically operated valve 4, 5th electrically operated valve 16, 6th electrically operated valve 10, second electric voltage regulator 9, first coal dust persists storehouse electrically operated valve 22 and controlled compression aerojet hole 42 is opened, first electrically operated valve 3, second electrically operated valve 6, 4th electrically operated valve 17, first electric voltage regulator 8 and the second coal dust persist storehouse electrically operated valve 40 and close, such pressurized air 54 is successively through the second electric voltage regulator 9, 6th electrically operated valve 10, first coal dust persists storehouse 13 and the second coal dust persists storehouse 14, 5th electrically operated valve 16, after 3rd electrically operated valve 4 and sampling pipe 19, coal dust remaining in device is blown into as-fired coal powder pipeline 1.
6th step, performs " keeping sample " action.Industrial control computer 44 is according to the coal dust near infrared spectrum data performing " sample preparation " action collection, judge current coal sample whether in known models storehouse, if just terminate " keeping sample " action in model bank, otherwise, then first send out code by connecting line D to electromechanical valve actuator 46, this instruction makes the second coal dust persist storehouse electrically operated valve 40 to open, and other all electrically operated valve is closed, thus pours in sample storage bottle 18 by the second coal dust coal dust persisted in storehouse 14; Then, industrial control computer 44 sends advancement commands by connecting line F to stepping crawler belt roller motor driver 48 again, this instruction makes stepping crawler belt roller bearing 11 to turn clockwise certain angle, thus make stepping crawler belt 12 advance to the right certain distance, next sample storage bottle is just in lower exit port that the second coal dust persists storehouse electrically operated valve 40, is ready to keep sample next time.
Principle of work of the present invention is: the present invention utilizes negative pressure by after the primary mixture intake system in as-fired coal powder pipeline 1, then relies on cyclone separator 7 to be separated in coal dust sample preparation device 15 by coal dust.In above process, because the principal element affecting online acquisition coal dust near infrared spectrum data has coal dust packing, coal dust temperature and coal dust surface smoothness, so for this problem, in the control of coal dust packing, the present invention is by adjusting as-fired coal powder pipeline 1 and compressed-air actuated pressure reduction in real time, the wind speed entered in cyclone separator 7 is remained unchanged substantially, thus makes coal dust fall into the first coal dust uniformly persisting in storehouse 13; In the control of coal dust temperature, the present invention utilizes cold wind to freeze to the coal dust in sample preparation unit, and according to the temperature that temperature sensor 23 gathers, industrial control computer 44 determines that whether this sampling is effective, substantially increase near infrared spectrum repeatability like this; Show in flatness at coal dust, the present invention is provided with sapphire window on coal dust sample preparation device 15, is close to this window after coal dust fills up in dead slot, thus when making collection coal dust near infrared spectrum, the flatness of its sample is almost constant.In addition, scan during each sampling and analyze the near infrared spectrum of coal dust sample preparation device hollow interlayer 38 Plays coal sample, the assessment for the duty of device provides authentic data dependence; Meanwhile, the present invention is under the cooperation of industrial control computer 44 and infrared spectrometer 45, and finding out-of-bounds can this sample of automatic capturing after sample, thus is convenient to expand model, and online coal property test adaptability is improved further.
The present invention, when performing " keeping sample " action, judges that the concrete steps of current coal sample whether in known models storehouse are as follows:
One, scan the near infrared spectrum of current tested coal dust, obtain its spectroscopic data S;
Two, utilize running mean algorithm, or Wavelets Filtering Algorithm carries out denoising to S;
Three, multiplicative scatter correction algorithm is utilized, or differential algorithm, or orthogonal transformation scheduling algorithm carries out pre-service to S;
Four, utilize principal component analysis (PCA), or Fourier Transform Algorithm etc. carries out feature extraction to S, the near infrared spectrum characteristic T of tested coal dust up till now;
Five, last according to characteristic T, utilize mahalanobis distance, K-average or SIMCA isotype recognition technology to judge it whether in known models storehouse.
Claims (5)
1. the sampling sample preparation device for online acquisition coal dust near infrared spectrum, comprise container body of outer cover, be assembled in the sample preparation unit in container body of outer cover and system control unit, it is characterized in that: in described sample preparation unit, blast pipe is provided with one end insertion as-fired coal powder pipeline of pressure transducer, and one end is connected to the first electrically operated valve in addition; 6th electrically operated valve is connected to the second electric voltage regulator respectively by pipeline, the first coal dust persists storehouse draft tube, the second coal dust persists storehouse draft tube; Cyclone separator has three interfaces, the upper end interface that powder falling mouth and first coal dust of its lower end persist storehouse is connected, the exhausr port of its upper end is connected with the second electrically operated valve by pipeline, and its air intake opening is connected with the 3rd electrically operated valve, the 4th electrically operated valve, the 5th electrically operated valve by pipeline; The lower end interface of the 5th electrically operated valve is connected to that the first coal dust persists storehouse escape pipe, the second coal dust persists storehouse escape pipe; The lower end interface that upper end interface and first coal dust of coal dust sample preparation device persist storehouse is connected, and the upper end interface that lower end interface and second coal dust of sample preparation device persist storehouse is connected; As-fired coal powder pipeline is inserted in sampling pipe one end, and the other end is connected with the 3rd electrically operated valve.
2. sampling sample preparation device according to claim 1, it is characterized in that: coal dust sample preparation device rear end is provided with coal dust sample preparation device stepper motor, and this stepping motor rotating shaft is set with can around the rearmounted panel of coal dust sample preparation device of its synchronous rotary, the solid interlayer of coal dust sample preparation device first, the solid interlayer of coal dust sample preparation device second, the solid interlayer of coal dust sample preparation device the 3rd, the hollow interlayer of coal dust sample preparation device and coal dust sample preparation device front panel, wherein, coal dust sample preparation device front panel and the rearmounted panel parallel of coal dust sample preparation device are installed, the solid interlayer of coal dust sample preparation device first, the solid interlayer of coal dust sample preparation device second, the solid interlayer of coal dust sample preparation device the 3rd, the hollow interlayer of coal dust sample preparation device is level fan cylinder, and the solid interlayer of coal dust sample preparation device first, the solid interlayer of coal dust sample preparation device the 3rd and the hollow interlayer similar shape of coal dust sample preparation device, their sector crosssection central angle is 45 °, the sector crosssection central angle being provided with the solid interlayer of coal dust sample preparation device second of near infrared standard reference plate in close this side of coal dust sample preparation device front panel is 135 °, the outside of coal dust sample preparation device front panel installs the first sapphire window according to 90 ° of angles with circumference, second sapphire window, 3rd sapphire window, 4th sapphire window, and ensure the first sapphire window just to and be close near infrared standard reference plate, second sapphire window is just to the dead slot between the solid interlayer of coal dust sample preparation device second and the solid interlayer of coal dust sample preparation device the 3rd, to the hollow interlayer of coal dust sample preparation device, 3rd sapphire window just ensures that light can inject its inside, 4th sapphire window is just to the dead slot between the first solid interlayer and the solid interlayer of coal dust sample preparation device second, the center pit of coal dust sample preparation device front panel is sleeved on coal dust sample preparation device stepping motor rotating shaft.
3. sampling sample preparation device according to claim 1, is characterized in that: in sample preparation unit, the first coal dust persists in storehouse and is provided with temperature sensor, and its exit, lower end is provided with the first coal dust persists storehouse electrically operated valve.
4. sampling sample preparation device according to claim 1, it is characterized in that: in sample preparation unit, the second coal dust persists in storehouse and leaves the controlled pressurized air gas orifice of two start and stop near coal dust sample preparation device front panel side, and its exit, lower end is provided with the second coal dust and persists storehouse electrically operated valve; Its exit lower end is placed with some sample storage bottles simultaneously, and these sample storage bottles are equidistantly put on stepping crawler belt, and stepping crawler belt is driven by stepping crawler belt roller bearing.
5. sampling sample preparation device according to claim 1, it is characterized in that: the pressure transducer controller in system control unit, temperature sensor controller are connected to industrial control computer respectively by connecting line A, connecting line B, the pressure transducer be arranged near blast pipe venthole is interconnected by corresponding line and pressure transducer controller, is arranged on the temperature sensor that the first coal dust persists in storehouse and is interconnected by corresponding line and temperature sensor controller; The scanning window of near infrared spectrometer just to the sapphire window on the right side of coal dust sample preparation device front panel, and is interconnected by connecting line C and industrial control computer; Industrial control computer is connected to electromechanical valve actuator, electric voltage regulator driver, stepping crawler belt roller motor driver, sample preparation device stepper motor driver respectively by connecting line D, connecting line E, connecting line F, connecting line G; Electromechanical valve actuator, electric voltage regulator driver, stepping crawler belt roller motor driver, sample preparation device stepper motor driver are interconnected to the 6th electrically operated valve, the first and second electric voltage regulator, stepping crawler belt roller motor, sample preparation device stepper motor by corresponding line respectively with the first.
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