CN112325956A - Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof - Google Patents
Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof Download PDFInfo
- Publication number
- CN112325956A CN112325956A CN202011084495.2A CN202011084495A CN112325956A CN 112325956 A CN112325956 A CN 112325956A CN 202011084495 A CN202011084495 A CN 202011084495A CN 112325956 A CN112325956 A CN 112325956A
- Authority
- CN
- China
- Prior art keywords
- probe
- solid
- phase flow
- pipeline
- adaptation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005514 two-phase flow Effects 0.000 title claims abstract description 62
- 239000007787 solid Substances 0.000 title claims abstract description 61
- 230000006698 induction Effects 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 89
- 239000003245 coal Substances 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 239000002245 particle Substances 0.000 claims abstract description 27
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 10
- 230000006978 adaptation Effects 0.000 claims description 80
- 230000003044 adaptive effect Effects 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 28
- 239000002817 coal dust Substances 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 12
- 238000012937 correction Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000001939 inductive effect Effects 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000010219 correlation analysis Methods 0.000 abstract description 3
- 238000007405 data analysis Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000011160 research Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000005686 electrostatic field Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
Abstract
The invention discloses an induction type high-temperature gas-solid two-phase flow measuring instrument, which comprises: the device comprises a sensing module inserted in a gas-solid two-phase flow pipeline and an analysis unit connected with the sensing module; the sensing module consists of two sensors with the distance of 200 mm; the sensor comprises a probe inserted in the gas-solid two-phase flow pipeline and a sensor base connected with the probe; an electrostatic induction sheet connected with the probe and an amplifier connected with the electrostatic induction are arranged in the sensor base; the amplifiers in the two sensors are connected by a cable. The charge induction detection technology utilizes the characteristics of static charges generated in the process of detecting pulverized coal grinding and pulverized coal particle crushing in a coal grinding mill and the process of pulverized coal pneumatic transmission to calculate the current important parameters of pulverized coal such as concentration, flow rate and the like through data analysis and processing and a correlation analysis method, and provides the parameters for boiler operators to guide combustion adjustment.
Description
Technical Field
The invention relates to a two-phase flow measuring instrument, in particular to an induction type high-temperature gas-solid two-phase flow measuring instrument.
Background
The research of gas-solid two-phase flow relates to the extensive industrial production processes of electric power, chemical industry, food processing, steel, metallurgy, mechanical manufacturing, medicine and the like, and the optimization control of the process is realized by carrying out online measurement on key parameters of the research, so that the research has very positive significance for improving the production efficiency, reducing the energy consumption and saving the energy, and the high-efficiency utilization of the energy meets the development requirement of low-carbon economy advocated globally.
Only taking the combustion process of a thermal power coal-fired boiler as an example, China is a big coal-producing country and is also a big coal-fired country, at present, more than 70 percent of electric power in China is provided by a coal-fired unit, the concentration, the speed and the mass flow of pulverized coal in a primary air pipe of the boiler directly influence the combustion condition of the boiler, measured values of the parameters are obtained on line, and reasonable air distribution is carried out to obtain low-temperature air distribution
The discharge has important function and can bring huge economic benefit and social benefit.
The existing gas-solid two-phase flow measuring instrument directly measures the concentration of pulverized coal through a microwave method, so that the detection precision is higher, and a detection unit is only required to be installed on a pulverized coal pipeline, so that the microwave flow measuring instrument is suitable for all pulverized coal system boilers, but the problems encountered by the real realization of engineering application, such as fluctuation of pulverized coal flow in the pipeline, abrasion of pulverized coal to a sensor, pollution of pulverized coal to the sensor and cleaning problems, can possibly cause detection failure if the problems are not solved well.
Disclosure of Invention
The purpose of the invention is as follows: provides an induction type high-temperature gas-solid two-phase flow measuring instrument, which aims to solve the problems in the prior art.
The technical scheme is as follows: an inductive high temperature gas-solid two-phase flow meter, comprising:
the device comprises a sensing module inserted in a gas-solid two-phase flow pipeline and an analysis unit connected with the sensing module;
the sensing module consists of two sensors with the distance of 200 mm;
the sensor comprises a probe inserted in the gas-solid two-phase flow pipeline and a sensor base connected with the probe; an electrostatic induction sheet connected with the probe and an amplifier connected with the electrostatic induction are arranged in the sensor base;
the amplifiers in the two sensors are connected through a cable;
the cable connection analysis unit;
the analysis unit comprises a signal conditioning module connected with a cable and an embedded low-power-consumption host connected with the signal conditioning module.
In a further embodiment, a sealing mechanism is arranged at the contact part of the gas-solid two-phase flow pipeline and the sensing module;
the sealing mechanism comprises an adaptive part arranged on the gas-solid two-phase flow pipeline and an inserting part which is inserted into the adaptive part and fixedly connected with the probe, and is designed to seal the sensing module, so that rainwater is prevented from flowing into the gas-solid two-phase flow pipeline from the sensing module, and the detection effect and precision are further influenced.
In a further embodiment, the adaptation part is fixedly installed on the adaptation shell on the gas-solid two-phase flow pipeline, the adaptation channel is arranged in the adaptation shell, the adaptation convex ball is arranged at the end part of the adaptation channel, the adaptation convex ball is designed to be matched with the adaptation groove, and then when the adaptation convex ball is clamped, the best sealing position is achieved, and then the best sealing is completed.
In a further embodiment, the insertion part comprises an insertion base fixedly connected with the probe, and an adaptive groove matched with the adaptive convex ball is formed in the insertion base;
when the plug part and the adaptation part are in contact work, the adaptation convex ball is in clamping adaptation with the adaptation groove, and the probe penetrates through the adaptation channel to be in contact with the inside of the gas-solid two-phase flow pipeline.
In a further embodiment, a sealing ring is arranged at the contact part of the adapting part and the inserting part; the sealing ring comprises a fixing part fixedly connected with the adaptive channel and a butting part sleeved with the probe, the fixing part and the butting part are designed, the sealing work of the detection module and the gas-solid two-phase flow pipeline is mainly completed, and then rainwater and other substances are prevented from entering the gas-solid two-phase flow pipeline to a further degree, so that the detection effect and the precision are influenced.
In a further embodiment, the fixing portion includes two sets of fixing rings fixedly connected to the fitting passage, and a compression spring disposed between the two sets of fixing rings.
In a further embodiment, the abutting part comprises a rebound spring, a spring gasket, a spring fixture block, a rubber ring and a rubber ring fixture block which are sequentially sleeved with the probe;
when fixed part and butt portion contact, the grafting base extrudees the rubber ring fixture block, and then extrudees rubber ring, spring fixture block, spring shim and rebound spring and solid fixed ring butt, reach best sealing position after adaptation convex ball and adaptation recess joint, design rebound spring, spring shim, spring fixture block, rubber ring and rubber ring fixture block, adopt extruded mode to extrude these parts, and then reduce the clearance between ground connection portion and the adaptation portion, and then in order to reach sealed work.
In a further embodiment, a slide way with a preset angle is arranged on the end, close to the adaptive groove, of the insertion base; the adaptive convex ball is clamped in the adaptive shell, a pressure spring is arranged on the clamping surface of the adaptive convex ball and the adaptive shell, and the pressure spring is fixedly connected with the adaptive convex ball; at least three fifths of the adaptive convex ball is arranged in the adaptive shell; the utility model discloses a three-in-one adaptation convex ball, including the adaptation convex ball, the probe is scalable probe, the inside telescopic link that is equipped with of probe, with the three fifths part setting of adaptation convex ball at least mainly in the adaptation casing in order to avoid the adaptation convex ball to appear the phenomenon of droing after long-time work, three fifths part sets up back in the adaptation casing, because spheroidal diameter, will be longer than the longest straight-line distance of the two fifths part of naked exposure, consequently no matter how, the adaptation ball drops when can't follow in the adaptation casing.
In a further embodiment, a data acquisition card is arranged in the embedded low-power-consumption host; the signal conditioning module is used for pre-amplifying, isolating and amplifying, low-pass filtering and re-amplifying the original signal of the signal received by the probe;
the embedded low-power-consumption host is internally provided with a calculation module, the charged coal powder generates a certain electric field, when charged coal powder particles pass through a metal induction probe on the sensor, equivalent induction charges are generated on the surface of the probe, a large amount of charged coal powder can generate induction current when moving at the probe, the size of the induction current is related to the mass flow rate and the particle size diameter of the coal powder flowing through the probe, and the approximate function relationship is as follows:
wherein the content of the first and second substances,
the constant of proportionality is expressed as,
the mass flow rate is represented by the flow rate,
the mean particle size diameter is expressed as the average particle size diameter,
which is indicative of the relevant flow rate,
the coefficient of induction is represented by the coefficient of induction,
which is representative of the current flowing through it,
representing a temperature correction function; the concentration detection of the particulate medium is realized by utilizing the relationship that the sensor induces the alternating current charge disturbance quantity to form positive correlation with the concentration value of the particulate medium and measuring the real-time flow velocity
After the correction is carried out, the relative concentration value of the particulate medium in the two-phase flow fluid can be accurately measured, and the absolute value of the concentration value of the particulate medium can be obtained after the on-site calibration.
A measuring method of an induction type high-temperature gas-solid two-phase flow measuring instrument comprises the following steps:
firstly, two circular holes with the diameter of 20mm are formed in the measured pipeline at intervals of 5cm along the pipeline direction, and a sensing module is installed; then, 4 identical circular holes are formed in the same section of the pipeline in the direction of 120-degree angle separation and used for installing sensing modules, the length of each probe is 160mm, the sensing modules are distributed according to 120 degrees, the fact that detection can cover all the sections of the pipeline is guaranteed, the influence of unstable coal dust flow distribution on detection results is reduced, and 6 sensors output two paths of signals;
the signal processing process comprises the following steps: the method comprises the following steps of pre-amplifying original small signals, isolating and amplifying signals, low-pass filtering (band-pass filtering) signals, amplifying the signals again, sending the amplified signals into a data acquisition board, and sending the amplified signals into an embedded low-power-consumption host to process and display the signals;
step 3, the charged coal powder generates a certain electric field, when charged coal powder particles pass through a metal induction probe on the sensor, equivalent induction charges are generated on the surface of the probe, and an induction current can be generated by the movement of a large amount of charged coal powder at the probe, wherein the magnitude of the induction current is related to the mass flow rate of the coal powder flowing through the probe and the particle size diameter, and the approximate function relationship is as follows:
wherein the content of the first and second substances,
the constant of proportionality is expressed as,
the mass flow rate is represented by the flow rate,
the mean particle size diameter is expressed as the average particle size diameter,
which is indicative of the relevant flow rate,
the coefficient of induction is represented by the coefficient of induction,
which is representative of the current flowing through it,
representing a temperature correction function; the concentration detection of the particulate medium is realized by utilizing the relationship that the sensor induces the alternating current charge disturbance quantity to form positive correlation with the concentration value of the particulate medium and measuring the real-time flow velocity
After the correction is carried out, the relative concentration value of the particulate medium in the two-phase flow fluid can be accurately measured, and the absolute value of the concentration value of the particulate medium can be obtained after the on-site calibration;
step 4, when the sensing module and the pipeline need to be sealed, the sensing module and the pipeline need to be sealed through a sealing mechanism, the adapting part is installed on the gas-solid two-phase flow pipeline, the adapting part is inserted through the inserting part and is clamped with the adapting groove through the adapting convex ball, so that the adapting part and the inserting part are clamped, and the probe penetrates through the adapting channel to be in contact with the inside of the gas-solid two-phase flow pipeline;
Has the advantages that: the invention discloses an induction type high-temperature gas-solid two-phase flow measuring instrument, wherein a charge induction detection technology utilizes the characteristics of static charges generated in the process of detecting pulverized coal which is ground and ground into pulverized coal particles in a coal mill and the process of pneumatically conveying the pulverized coal, and data analysis and processing are carried out, and calculates the current coal powder concentration, flow rate and other important parameters by using a correlation analysis method, provides the parameters for the boiler operator to guide combustion adjustment, the charge induction replaces the traditional microwave method and the alternating current charge induction detection technology, the flow velocity, the concentration and the flow rate of the fluid medium are calculated by measuring the static characteristic parameters in the high-temperature gas-solid two-phase flow pipeline, the real-time detection of the flow velocity, the concentration and the flow of the fluid medium provides a real-time basis for the optimal control of a monitoring system in the continuous production process.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the installation distribution of the present invention.
Fig. 3 is a schematic diagram of the basic principle of charge induction of the present invention.
Fig. 4 is a schematic view illustrating the principle of measuring the velocity of pulverized coal according to the present invention.
Fig. 5 is a schematic view of the sealing mechanism of the present invention.
FIG. 6 is a schematic view of a seal ring of the present invention.
Fig. 7 is an exploded view of the seal ring of the present invention.
The reference signs are: fixed part 1, solid fixed ring 11, compression spring 12, adaptation convex ball 2, probe 3, butt portion 4, rebound spring 41, spring fixture block 42, rubber ring 43, rubber ring fixture block 44, adaptation recess 5, grafting base 6, adaptation portion 7, grafting portion 8.
Detailed Description
Through research and analysis of the applicant, the reason for the problem (the existing automobile has higher maintenance cost) is that,
the principle of microwave method for detecting coal powder is to use one transmitting probe to transmit microwave into pipeline and another probe to receive microwave, the different content of coal powder will affect some characteristics of received microwave signal, and the variation of coal powder content in pipeline is obtained by analysis of these characteristic variationsThe powder, this layer of coal dust, which affects the signals received by the receiving probe, causes detection failures and great errors, some manufacturers avoid contamination by means of gas sources or corrections, but it has been proved that probes operating in the pipeline for a long time are always contaminated without exception, which causes detection failures, product Pf-FLOThe performance test of various coal powder detection devices in a Longhorn power plant organized in the British energy industry has failed detection, so that the microwave measurement has certain implementation problems which cannot be avoided fundamentally and the product is immature; the microwave detection utilizes a reference microwave source to emit reference microwaves, the microwave sources are active devices, and the reference deviation can be caused after long-term operation, which is the problem that the active devices cannot avoid, and some high-precision microwave sources are only small in the deviation amount, but the drift cannot be avoided fundamentally unless passive devices are used; the microwave source emits microwave injection energy into the pipeline, if the microwave source is out of control, high-power microwave is possibly injected into the pipeline, the coal dust in the pipeline is in danger of firing, although the probability is very small, the possibility still exists, which is hidden danger on safety, but the invention utilizes the characteristics of static charges generated in the process of detecting the coal dust ground and ground into coal dust particles in a coal mill and the pneumatic conveying process of the coal dust through a charge induction detection technology, and calculates the current important parameters of the coal dust such as concentration, flow rate and the like through data analysis and processing and a correlation analysis method, and provides the parameters for boiler operators to guide combustion adjustment;
the most difficult problem of detection in the wind pipeline of once more is the pollution of buggy, and the detection principle of charge induction method has utilized the response of electrostatic field, and the response silk of electrostatic field is not influenced by external medium at all (except that the metal arouses the shielding), and in the in-service use in-process, the sensor surface also can be polluted by the buggy, but because buggy itself is not the metal, the buggy on surface covers and does not influence the response of electrostatic field to the probe, and the experiment proves: the coal powder layer with the thickness of 10mm covered on the surface of the probe has no influence on detection, due to the characteristic of electrostatic detection, the pollution problem of detection of a sensor in a pipeline is solved revolutionarily, and the long-term working is ensured to be free of deviation, so that the coal powder detection probe becomes the most mature coal powder detection technology internationally and is also developed at a high speed, products of ABB (international famous manufacturers) and Tr-Tech (Tr-Tech) companies adopt various technologies, and the coal powder detection probe obtains the highest evaluation in performance tests of various coal powder detection devices of a Longhorn power plant organized in the energy industry of England;
the sensor manufactured by PCM by utilizing the charge induction technology is a source device which passively receives electrostatic signals generated by pulverized coal, so that the characteristics of the sensor can never be changed once the sensor is manufactured, the sensor works stably for a long time, the drift problem of an active device is fundamentally avoided, and extremely high detection precision is brought;
the charge induction method has no emission problem, so the probe is not an antenna fundamentally (the probe is actually an emission antenna in the microwave method), so special requirements on materials do not exist, the probe is only a metal conductor, PCM utilizes the latest research result of material science, the wear resistance of a special alloy probe specially made by the PCM is more than 24 times that of tool steel, the service life is greatly prolonged, the sensor does not need to be maintained in a overhaul period, and the use by users is facilitated.
An inductive high temperature gas-solid two-phase flow meter, comprising: fixed part 1, solid fixed ring 11, compression spring 12, adaptation convex ball 2, probe 3, butt portion 4, rebound spring 41, spring fixture block 42, rubber ring 43, rubber ring fixture block 44, adaptation recess 5, grafting base 6, adaptation portion 7, grafting portion 8.
An induction type high-temperature gas-solid two-phase flow measuring instrument comprises a sensing module inserted in a gas-solid two-phase flow pipeline and an analysis unit connected with the sensing module; the sensing module consists of two sensors with the distance of 200 mm; the sensor comprises a probe 3 inserted in the gas-solid two-phase flow pipeline and a sensor base connected with the probe 3; an electrostatic induction sheet connected with the probe 3 and an amplifier connected with the electrostatic induction are arranged in the sensor base; the amplifiers in the two sensors are connected through a cable; the cable connection analysis unit; the analysis unit comprises a signal conditioning module connected with a cable and an embedded low-power-consumption host connected with the signal conditioning module.
A sealing mechanism is arranged at the contact part of the gas-solid two-phase flow pipeline and the sensing module;
the sealing mechanism comprises an adaptation part 7 arranged on the gas-solid two-phase flow pipeline and an insertion part 8 which is inserted into the adaptation part 7 and fixedly connected with the probe 3, and is designed to seal the sensing module, so that rainwater is prevented from flowing into the gas-solid two-phase flow pipeline from the sensing module, and the detection effect and precision are further influenced.
Adaptation portion 7 fixed mounting is in adaptation casing on the gas-solid two-phase flow pipeline sets up adaptation way in the adaptation casing, and set up adaptation bead 2 of tip is said in the adaptation, design adaptation bead 2 carries out and carries out the cooperation work with adaptation recess 5, and then when adaptation bead 2 during adaptation recess 5 joint, reaches the best sealed position, and then accomplishes best sealed.
The inserting part 8 comprises an inserting base 6 fixedly connected with the probe 3, and an adapting groove 5 adapted to the adapting convex ball 2 is formed in the inserting base 6;
when the plug part 8 and the adaptation part 7 are in contact work, the adaptation convex ball 2 is in clamping adaptation with the adaptation groove 5, and the probe 3 penetrates through the adaptation channel to be in contact with the inside of the gas-solid two-phase flow pipeline.
A sealing ring is arranged at the contact position of the adapting part 7 and the inserting part 8; the sealing ring includes with adaptation way fixed connection's fixed part 1 to and cup joint the butt portion 4 of probe 3, design fixed part 1 and butt portion 4, mainly in order to further accomplish the sealed work to detection module and gas-solid two-phase flow pipeline, and then avoid rainwater and other materials to get into in the gas-solid two-phase flow pipeline to a further extent, and then influence detection effect and precision.
The fixing part 1 comprises two groups of fixing rings 11 fixedly connected with the adaptation channels and a compression spring 12 arranged between the two groups of fixing rings 11.
The abutting part 4 comprises a rebound spring 41, a spring gasket, a spring fixture block 42, a rubber ring 43 and a rubber ring fixture block 44 which are sequentially sleeved with the probe 3;
when fixed part 1 and butt portion 4 contact, 6 extrusion rubber ring fixture blocks 44 of grafting base, and then extrusion rubber ring 43, spring fixture block 42, spring shim and rebound spring 41 and fixed ring 11 butt, reach best sealing position after adaptation convex ball 2 and adaptation recess 5 joint, design rebound spring 41, spring shim, spring fixture block 42, rubber ring 43, and rubber ring fixture blocks 44, adopt the extruded mode to extrude these parts, and then reduce the clearance between ground connection portion and adaptation portion 7, and then in order to reach sealed work.
A slide way with a preset angle is arranged on the end, close to the adaptive groove 5, of the inserting base 6; the adaptive convex ball 2 is clamped in the adaptive shell, a pressure spring is arranged on the clamping surface of the adaptive convex ball 2 and the adaptive shell, and the pressure spring is fixedly connected with the adaptive convex ball 2; at least three fifths of the adaptive convex ball 2 is arranged in the adaptive shell; probe 3 is scalable probe 3, the inside telescopic link that is equipped with of probe 3, with the protruding ball 2 at least three fifths of parts of adaptation setting in the adaptation casing mainly in order to avoid the protruding ball 2 of adaptation to appear the phenomenon of coming off after long-time work, three fifths of parts set up in the adaptation casing after, because spheroidal diameter, will be longer than the two fifths partial longest straight-line distance of naked exposure, consequently no matter how, the adaptation ball is when unable from coming off in the adaptation casing.
A data acquisition card is arranged in the embedded low-power-consumption host; the signal conditioning module is used for pre-amplifying, isolating and amplifying, low-pass filtering and re-amplifying the original signal of the signal received by the probe 3;
the embedded low-power-consumption host is internally provided with a calculation module, the charged coal powder generates a certain electric field, when charged coal powder particles pass through a metal induction probe 3 on the sensor, equivalent induction charges are generated on the surface of the probe 3, a large amount of charged coal powder can generate induction current in the movement of the probe 3, the size of the induction current is related to the mass flow rate of the coal powder flowing through the probe 3 and the particle size diameter, and the approximate function relationship is as follows:
wherein the content of the first and second substances,
the constant of proportionality is expressed as,
the mass flow rate is represented by the flow rate,
the mean particle size diameter is expressed as the average particle size diameter,
which is indicative of the relevant flow rate,
the coefficient of induction is represented by the coefficient of induction,
which is representative of the current flowing through it,
representing a temperature correction function; the concentration detection of the particulate medium is to utilize a sensor to sense the relationship of positive correlation between the disturbance quantity of alternating current charges and the concentration value of the particulate medium, correct the measured real-time flow velocity V to accurately measure the relative concentration value of the particulate medium in the two-phase flow fluid, and obtain the absolute value of the concentration value of the particulate medium after on-site calibration.
Description of the working principle: round holes with the diameter of 20mm are formed in the detected pipeline in the direction forming an angle of 120 degrees with each other, sensors are installed, three probes are arranged in a star shape, the two probes can ensure that the detection can cover the cross section of the whole pipeline, and the influence of unstable coal dust flow distribution on the detection result is reduced; because the sensor measures the electrostatic signal carried by the pulverized coal, the pipeline is required to be perforated, the position of the perforated is selected at a place where the flow field is relatively stable, and the position of the perforated is recommended to be selected to be more than 4-6 times of pipe diameter away from the previous pipeline bending part and more than 2-4 times of pipe diameter away from the next pipeline bending part; firstly, two circular holes with the diameter of 20mm are formed in the measured pipeline at intervals of 5cm along the pipeline direction, and a sensing module is installed; then, 4 identical circular holes are formed in the same section of the pipeline in the direction of 120-degree angle separation and used for installing sensing modules, the length of each probe is 160mm, the sensing modules are distributed according to 120 degrees, the fact that detection can cover all the sections of the pipeline is guaranteed, the influence of unstable coal dust flow distribution on detection results is reduced, and 6 sensors output two paths of signals; after the sensor is installed, the two paths of signals are transmitted to the signal conditioning module through the cable for signal processing; the signal processing process comprises the following steps: the method comprises the following steps of pre-amplifying original small signals, isolating and amplifying signals, low-pass filtering (band-pass filtering) signals, amplifying the signals again, sending the amplified signals into a data acquisition board, and sending the amplified signals into an embedded low-power-consumption host to process and display the signals; electrified buggy produces certain electric field, and when electrified buggy particle passed through metal inductive probe 3 on the sensor, produced equivalent response charge on the 3 surfaces of probe, the removal of a large amount of electrified buggy in probe 3 department can produce induced current, and the size of induced current is related to buggy mass flow, the particle size diameter of flowing through probe 3, and its approximate function relation is:
wherein the content of the first and second substances,
the constant of proportionality is expressed as,
the mass flow rate is represented by the flow rate,
the mean particle size diameter is expressed as the average particle size diameter,
which is indicative of the relevant flow rate,
the coefficient of induction is represented by the coefficient of induction,
which is representative of the current flowing through it,
representing a temperature correction function; the concentration detection of the particulate medium is realized by utilizing the relationship that the sensor induces the alternating current charge disturbance quantity to form positive correlation with the concentration value of the particulate medium and measuring the real-time flow velocity
After the correction is carried out, the relative concentration value of the particulate medium in the two-phase flow fluid can be accurately measured, and the absolute value of the concentration value of the particulate medium can be obtained after the on-site calibration; and when sensing module and pipeline need seal, need seal sensing module and pipeline through sealing mechanism this moment, install adaptation portion 7 on gas-solid two-phase flow pipeline this moment, carry out grafting adaptation portion 7 through grafting portion 8 this moment, through adaptation convex ball 2 and adaptation recess 5 joint, and then make adaptation portion7 and the plug-in part 8 are clamped, and the probe 3 penetrates through the adapting channel to contact with the inside of the gas-solid two-phase flow pipeline; in the clamping process of the adaptive convex ball 2 and the adaptive groove 5, the fixed part 1 is in contact with the abutting part 4, the rubber ring clamping block 44 is extruded by the inserting base 6, the rubber ring 43, the spring clamping block 42, the spring gasket and the rebound spring 41 are abutted against the fixing rings 11, then two groups of fixing rings 11 are extruded, the compression spring 12 arranged between the two groups of fixing rings 11 is arranged, and the extrusion is completed by the rubber ring 43, the spring clamping block 42, the spring gasket and the rebound spring 41, the fixing rings 11, the two groups of fixing rings 11 and the compression spring 12 arranged between the two groups of fixing rings 11, so that the sealing is completed; when the adaptive convex ball 2 is clamped with the adaptive groove 5, the optimal sealing position is achieved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (10)
1. An induction type high-temperature gas-solid two-phase flow measuring instrument is characterized by comprising:
the device comprises a sensing module inserted in a gas-solid two-phase flow pipeline and an analysis unit connected with the sensing module;
the sensing module consists of two sensors with the distance of 200 mm;
the sensor comprises a probe inserted in the gas-solid two-phase flow pipeline and a sensor base connected with the probe; an electrostatic induction sheet connected with the probe and an amplifier connected with the electrostatic induction are arranged in the sensor base;
the amplifiers in the two sensors are connected through a cable;
the cable connection analysis unit;
the analysis unit comprises a signal conditioning module connected with a cable and an embedded low-power-consumption host connected with the signal conditioning module.
2. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 1, wherein: a sealing mechanism is arranged at the contact part of the gas-solid two-phase flow pipeline and the sensing module;
the sealing mechanism comprises an adaptation part arranged on the gas-solid two-phase flow pipeline and an insertion part which is inserted into the adaptation part and fixedly connected with the probe.
3. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 2, wherein: the adaptation part is fixedly arranged on the adaptation shell on the gas-solid two-phase flow pipeline, the adaptation channel is arranged in the adaptation shell, and the adaptation convex ball is arranged at the end part of the adaptation channel.
4. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 2, wherein: the inserting part comprises an inserting base fixedly connected with the probe, and an adapting groove adapted to the adapting convex ball is formed in the inserting base;
when the plug part and the adaptation part are in contact work, the adaptation convex ball is in clamping adaptation with the adaptation groove, and the probe penetrates through the adaptation channel to be in contact with the inside of the gas-solid two-phase flow pipeline.
5. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 2, wherein: a sealing ring is arranged at the contact position of the adapting part and the inserting part; the sealing ring comprises a fixing part fixedly connected with the adapting channel and a butting part sleeved with the probe.
6. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 5, wherein: the fixed part include with the adaptation says two sets of solid fixed rings of fixed connection to and set up the compression spring between two sets of solid fixed rings.
7. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 5, wherein: the abutting part comprises a rebound spring, a spring gasket, a spring clamping block, a rubber ring and a rubber ring clamping block which are sequentially sleeved with the probe;
when fixed part and butt portion contact, the base extrusion rubber ring fixture block of pegging graft, and then extrusion rubber ring, spring fixture block, spring shim and rebound spring and solid fixed ring butt reach best sealing position after adaptation convex ball and adaptation recess joint.
8. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 5, wherein: a slide way with a preset angle is arranged on the end, close to the adaptive groove, of the inserting base; the adaptive convex ball is clamped in the adaptive shell, a pressure spring is arranged on the clamping surface of the adaptive convex ball and the adaptive shell, and the pressure spring is fixedly connected with the adaptive convex ball; at least three fifths of the adaptive convex ball is arranged in the adaptive shell; the probe is a telescopic probe, and a telescopic rod is arranged in the probe.
9. The inductive high-temperature gas-solid two-phase flow measuring instrument according to claim 1, wherein: a data acquisition card is arranged in the embedded low-power-consumption host; the signal conditioning module is used for pre-amplifying, isolating and amplifying, low-pass filtering and re-amplifying the original signal of the signal received by the probe;
the embedded low-power-consumption host is internally provided with a calculation module, the charged coal powder generates a certain electric field, when charged coal powder particles pass through a metal induction probe on the sensor, equivalent induction charges are generated on the surface of the probe, a large amount of charged coal powder can generate induction current when moving at the probe, the size of the induction current is related to the mass flow rate and the particle size diameter of the coal powder flowing through the probe, and the approximate function relationship is as follows:
wherein the content of the first and second substances,
the constant of proportionality is expressed as,
the mass flow rate is represented by the flow rate,
the mean particle size diameter is expressed as the average particle size diameter,
which is indicative of the relevant flow rate,
the coefficient of induction is represented by the coefficient of induction,
which is representative of the current flowing through it,
representing a temperature correction function; the concentration detection of the particulate medium is realized by utilizing the relationship that the sensor induces the alternating current charge disturbance quantity to form positive correlation with the concentration value of the particulate medium and measuring the real-time flow velocity
After the correction is carried out, the relative concentration value of the particulate medium in the two-phase flow fluid can be accurately measured, and the absolute value of the concentration value of the particulate medium can be obtained after the on-site calibration.
10. A measuring method of an induction type high-temperature gas-solid two-phase flow measuring instrument is characterized by comprising the following steps:
step 1, opening circular holes with the diameter of 20mm in the direction forming an angle of 120 degrees with each other on a detected pipeline, installing a sensor, arranging three probes in a star shape, wherein the two probes can ensure that the detection can cover the cross section of the whole pipeline so as to reduce the influence of unstable coal dust flow distribution on a detection result; because the sensor measures the electrostatic signal carried by the pulverized coal, the pipeline is required to be perforated, the position of the perforated is selected at a place where the flow field is relatively stable, and the position of the perforated is recommended to be selected to be more than 4-6 times of pipe diameter away from the previous pipeline bending part and more than 2-4 times of pipe diameter away from the next pipeline bending part;
firstly, two circular holes with the diameter of 20mm are formed in the measured pipeline at intervals of 5cm along the pipeline direction, and a sensing module is installed; then, 4 identical circular holes are formed in the same section of the pipeline in the direction of 120-degree angle separation and used for installing sensing modules, the length of each probe is 160mm, the sensing modules are distributed according to 120 degrees, the fact that detection can cover all the sections of the pipeline is guaranteed, the influence of unstable coal dust flow distribution on detection results is reduced, and 6 sensors output two paths of signals;
step 2, after the sensor is installed, transmitting the two paths of signals to a signal conditioning module through a cable for signal processing;
the signal processing process comprises the following steps: the method comprises the following steps of pre-amplifying original small signals, isolating and amplifying signals, low-pass filtering (band-pass filtering) signals, amplifying the signals again, sending the amplified signals into a data acquisition board, and sending the amplified signals into an embedded low-power-consumption host to process and display the signals;
step 3, the charged coal powder generates a certain electric field, when charged coal powder particles pass through a metal induction probe on the sensor, equivalent induction charges are generated on the surface of the probe, and an induction current can be generated by the movement of a large amount of charged coal powder at the probe, wherein the magnitude of the induction current is related to the mass flow rate of the coal powder flowing through the probe and the particle size diameter, and the approximate function relationship is as follows:
wherein the content of the first and second substances,
the constant of proportionality is expressed as,
the mass flow rate is represented by the flow rate,
the mean particle size diameter is expressed as the average particle size diameter,
which is indicative of the relevant flow rate,
the coefficient of induction is represented by the coefficient of induction,
which is representative of the current flowing through it,
representing a temperature correction function; the concentration detection of the particulate medium is realized by utilizing the relationship that the sensor induces the alternating current charge disturbance quantity to form positive correlation with the concentration value of the particulate medium and measuring the real-time flow velocity
After the correction is carried out, the relative concentration value of the particulate medium in the two-phase flow fluid can be accurately measured, and the absolute value of the concentration value of the particulate medium can be obtained after the on-site calibration;
step 4, when the sensing module and the pipeline need to be sealed, the sensing module and the pipeline need to be sealed through a sealing mechanism, the adapting part is installed on the gas-solid two-phase flow pipeline, the adapting part is inserted through the inserting part and is clamped with the adapting groove through the adapting convex ball, so that the adapting part and the inserting part are clamped, and the probe penetrates through the adapting channel to be in contact with the inside of the gas-solid two-phase flow pipeline;
step 5, in the process of clamping the adaptive convex ball and the adaptive groove, the fixed part is in contact with the abutting part, the rubber ring fixture block is extruded by the splicing base, the rubber ring, the spring fixture block, the spring gasket, the rebound spring and the fixing ring are further extruded to abut against the fixing ring, then the two groups of fixing rings are extruded, the compression spring arranged between the two groups of fixing rings is further extruded, the extrusion is completed by the extrusion rubber ring, the spring fixture block, the spring gasket, the rebound spring, the fixing ring, the two groups of fixing rings and the compression spring arranged between the two groups of fixing rings, and then the sealing is completed; when the adaptive convex ball is clamped with the adaptive groove, the optimal sealing position is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084495.2A CN112325956A (en) | 2020-10-12 | 2020-10-12 | Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084495.2A CN112325956A (en) | 2020-10-12 | 2020-10-12 | Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112325956A true CN112325956A (en) | 2021-02-05 |
Family
ID=74313504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011084495.2A Pending CN112325956A (en) | 2020-10-12 | 2020-10-12 | Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112325956A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314011A (en) * | 2021-12-31 | 2022-04-12 | 成都瑞柯林工程技术有限公司 | Particulate matter recovery device |
| CN114408588A (en) * | 2021-12-31 | 2022-04-29 | 成都瑞柯林工程技术有限公司 | Pneumatic conveying detection method and detection equipment for particulate matters |
| CN116227982A (en) * | 2022-12-30 | 2023-06-06 | 中国矿业大学(北京) | Quantification method and device for pollution degree of coal dust |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093174A (en) * | 2002-08-29 | 2004-03-25 | Tokyo Gas Co Ltd | Flowmeter |
| CN2752754Y (en) * | 2004-10-15 | 2006-01-18 | 南京大陆中电科技股份有限公司 | Pulverized coal concentration on-line detector |
| CN201193747Y (en) * | 2008-04-30 | 2009-02-11 | 罗鹏超 | Connecting seal assembly |
| CN203148477U (en) * | 2012-12-03 | 2013-08-21 | 天津朗辰光电科技有限公司 | Oil-water mixed liquor meter |
| CN103837198A (en) * | 2012-11-26 | 2014-06-04 | 天津朗辰光电科技有限公司 | Multi-phase flow monitor |
| CN105020483A (en) * | 2014-04-24 | 2015-11-04 | 德卡富（徐州）测控技术有限公司 | Sealing structure for cable outgoing hole of electric device |
| CN204789462U (en) * | 2015-06-30 | 2015-11-18 | 南京达凯电力自动化设备有限公司 | Buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said |
| CN206161481U (en) * | 2016-09-28 | 2017-05-10 | 中国大唐集团科学技术研究院有限公司 | Wireless transmission type coal powder concentration on - line measuring device |
| CN107132166A (en) * | 2017-06-29 | 2017-09-05 | 苏州曼德克光电有限公司 | A kind of direct insertion dust concentration tester and measuring method |
| CN108331551A (en) * | 2018-02-11 | 2018-07-27 | 中国石油天然气股份有限公司 | A kind of method of selective shut-off tool and its plugging tubing string |
| CN209430758U (en) * | 2019-01-11 | 2019-09-24 | 福建裕全机械制造有限公司 | A kind of oil seal cover that leakproofness is strong |
| CN210661364U (en) * | 2019-09-17 | 2020-06-02 | 大连远东永昌自动化工程有限公司 | Pull rod sealing assembly |
| CN211038104U (en) * | 2019-10-25 | 2020-07-17 | 北京易成市政工程有限责任公司 | Assembled enclosure device |
-
2020
- 2020-10-12 CN CN202011084495.2A patent/CN112325956A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093174A (en) * | 2002-08-29 | 2004-03-25 | Tokyo Gas Co Ltd | Flowmeter |
| CN2752754Y (en) * | 2004-10-15 | 2006-01-18 | 南京大陆中电科技股份有限公司 | Pulverized coal concentration on-line detector |
| CN201193747Y (en) * | 2008-04-30 | 2009-02-11 | 罗鹏超 | Connecting seal assembly |
| CN103837198A (en) * | 2012-11-26 | 2014-06-04 | 天津朗辰光电科技有限公司 | Multi-phase flow monitor |
| CN203148477U (en) * | 2012-12-03 | 2013-08-21 | 天津朗辰光电科技有限公司 | Oil-water mixed liquor meter |
| CN105020483A (en) * | 2014-04-24 | 2015-11-04 | 德卡富（徐州）测控技术有限公司 | Sealing structure for cable outgoing hole of electric device |
| CN204789462U (en) * | 2015-06-30 | 2015-11-18 | 南京达凯电力自动化设备有限公司 | Buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said |
| CN206161481U (en) * | 2016-09-28 | 2017-05-10 | 中国大唐集团科学技术研究院有限公司 | Wireless transmission type coal powder concentration on - line measuring device |
| CN107132166A (en) * | 2017-06-29 | 2017-09-05 | 苏州曼德克光电有限公司 | A kind of direct insertion dust concentration tester and measuring method |
| CN108331551A (en) * | 2018-02-11 | 2018-07-27 | 中国石油天然气股份有限公司 | A kind of method of selective shut-off tool and its plugging tubing string |
| CN209430758U (en) * | 2019-01-11 | 2019-09-24 | 福建裕全机械制造有限公司 | A kind of oil seal cover that leakproofness is strong |
| CN210661364U (en) * | 2019-09-17 | 2020-06-02 | 大连远东永昌自动化工程有限公司 | Pull rod sealing assembly |
| CN211038104U (en) * | 2019-10-25 | 2020-07-17 | 北京易成市政工程有限责任公司 | Assembled enclosure device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314011A (en) * | 2021-12-31 | 2022-04-12 | 成都瑞柯林工程技术有限公司 | Particulate matter recovery device |
| CN114408588A (en) * | 2021-12-31 | 2022-04-29 | 成都瑞柯林工程技术有限公司 | Pneumatic conveying detection method and detection equipment for particulate matters |
| CN116227982A (en) * | 2022-12-30 | 2023-06-06 | 中国矿业大学(北京) | Quantification method and device for pollution degree of coal dust |
| CN116227982B (en) * | 2022-12-30 | 2023-10-31 | 中国矿业大学(北京) | Quantification method and device for pollution degree of coal dust |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112325956A (en) | Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof | |
| KR101224362B1 (en) | Device for Measuring Two-phase Flow Phase Concentration, System and Method for Measuring Flow Parameters of Two-phase Flow | |
| CN203981700U (en) | Dust through-current capacity pick-up unit | |
| CN1800821A (en) | Method and apparatus for measuring coal powder concentration and wind powder speed in coal power transportation pipe | |
| CN100460831C (en) | Method and device for detecting micro-charge type online dust and detector pollution | |
| WO2021203669A1 (en) | System and method for performing grid measurement on gaseous components in flue gas | |
| CN109270294A (en) | A kind of online detection of primary air system and measurement method | |
| CN202582596U (en) | System for integrally measuring air quantity, concentration, and granularity | |
| CN104614024A (en) | Method and device for representing electrostatic measurement of coal powder flows of milling and conveying system of power plant | |
| CN101349604A (en) | Apparatus and method for testing and monitoring pipe real time pressure | |
| CN202442118U (en) | Intelligent pipe network leakage detection system for compressed air system | |
| CN210833647U (en) | Powder speed, concentration and fineness online measurement system in powder conveying pipe | |
| CN106771047B (en) | Multi-sensor-based pulverized coal water content and coal type monitoring device and method | |
| CN219495323U (en) | Portable Pi Tuoer flowmeter | |
| CN204705569U (en) | Apparatus for measuring dust concentration | |
| CN204807419U (en) | Microwave concentration on line measurement system | |
| CN106443055A (en) | Coil-type wind powder online measuring system and method | |
| CN203894138U (en) | Double-charge full-automatic on-line pulverized coal detection device | |
| CN206788610U (en) | A kind of measurement apparatus | |
| CN204495409U (en) | A kind of power station powder process induction system pulverized coal flow electrostatic measurement characterization apparatus | |
| CN110145365A (en) | A kind of mine goaf fire monitoring prior-warning device | |
| CN112197913A (en) | Sliding type pipeline leakage point detection positioning device and detection positioning method thereof | |
| CN2731249Y (en) | Precision positioning device for defect of long conveying pipe line | |
| CN207181232U (en) | A kind of sensitive and durable ELECTROSTATIC DUST sensor | |
| CN108572128A (en) | A kind of comparison method of granular material discharged monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |