CN202757723U - Device for measuring stress of coal particles in concentrated phase gas-solid fluidized bed - Google Patents
Device for measuring stress of coal particles in concentrated phase gas-solid fluidized bed Download PDFInfo
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- CN202757723U CN202757723U CN 201220336986 CN201220336986U CN202757723U CN 202757723 U CN202757723 U CN 202757723U CN 201220336986 CN201220336986 CN 201220336986 CN 201220336986 U CN201220336986 U CN 201220336986U CN 202757723 U CN202757723 U CN 202757723U
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- 239000002245 particle Substances 0.000 title claims abstract description 66
- 239000003245 coal Substances 0.000 title claims abstract description 54
- 239000007787 solid Substances 0.000 title claims abstract description 48
- 238000005259 measurement Methods 0.000 abstract description 12
- 230000007246 mechanism Effects 0.000 description 7
- 238000009530 blood pressure measurement Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 238000005243 fluidization Methods 0.000 description 5
- 230000036651 mood Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
一种浓相气固流化床中煤炭颗粒的受力测量装置，包括内置有煤炭颗粒的气固流化床，在气固流化床的下部设有布风气室和气流分布板，气固流化床的底部顺序连接有转子流量计、风压控制装置、风包和风机，在气固流化床的侧面连接有动态压差测量装置；气固流化床内设有与煤炭颗粒紧密接触的柔性绳索；柔性绳索的外端与高精度触点拉力器、信号转换器、数据采集输出装置和数据信号显示器顺序连接，通过柔性绳索将煤炭颗粒的受力信息实时传递到高精度触点拉力器上。其结构简单、操作方便、易控制、测量精度高、可靠性好，能实现浓密气固多相流中大尺寸多种颗粒的准确受力测量，应用范围广。
A force measuring device for coal particles in a dense-phase gas-solid fluidized bed, including a gas-solid fluidized bed with built-in coal particles, an air distribution chamber and an air distribution plate are arranged at the lower part of the gas-solid fluidized bed, The bottom of the fluidized bed is sequentially connected with a rotameter, wind pressure control device, wind bag and fan, and a dynamic pressure difference measuring device is connected to the side of the gas-solid fluidized bed; Contact flexible rope; the outer end of the flexible rope is sequentially connected with the high-precision contact tensioner, signal converter, data acquisition output device and data signal display, and the force information of the coal particles is transmitted to the high-precision contact tensioner in real time through the flexible rope superior. It has the advantages of simple structure, convenient operation, easy control, high measurement accuracy and good reliability, and can realize accurate force measurement of large-sized and various particles in dense gas-solid multiphase flow, and has a wide range of applications.
Description
Technical field
The utility model relates to a kind of stress measuring device of coal particles, the stress measuring device of coal particles in especially a kind of dense gas solid bed.
Background technology
The coal resources of China mainly are distributed in the drought and water shortage areas such as Shanxi, Shaanxi, Inner Mongol, Xinjiang, adopt the technical difficulty of wet coal preparation very large, and therefore exploitation and popularization High Effective Dry Coal Beneficiation Technology are extremely urgent.Concentrated phase high density fluidisation bed accessory based on gas-solid multiphase flow has the advantages such as applied range, the efficiency of separation is high, environmental pollution is little, is applied to gradually the dry coal preparation field.This fluidized bed mainly is to form the stable loose formula bubbling fluidized bed of standard of each point even density in the bed by the abundant contact of gas-solid two-phase and stable-state flow, and separating by density stratification for coal particles provides good environment.Coal particles stressed is the key factor that determines its movement locus and dynamic behavior, so on raw coal by the vital impact of density separation behavior generation.At present for the stressed measurement research of large-size particle in the airtight polyphasic flow of concentrated phase seldom, only a small amount of bibliographical information is arranged by means of external force field to the stressed method of estimating of particle, as indirectly measuring etc. particle is stressed by means of externally-applied magnetic field or electric field, but measuring accuracy and reliability are all lower.
Summary of the invention
The purpose of this utility model is the weak point that overcomes in the prior art, provide a kind of simple in structure, easy to operate, easy to control, measuring accuracy is high, the stress measuring device of coal particles in the dense gas solid bed of good reliability.
The stress measuring device of coal particles in the dense gas solid bed of the present utility model, it comprises and is built-in with the gas-solid fluidized bed of coal particles, be provided with cloth general mood chamber and airflow-distribution board in gas-solid fluidized bed bottom, gas-solid fluidized bed bottom be linked in sequence spinner-type flowmeter, air pressure control device, bellows chamber and blower fan are connected with the dynamic differential pressure measurement mechanism in gas-solid fluidized bed side; Be provided with the flexible rope with the coal particles close contact in gas-solid fluidized bed; The outer end of flexible rope and high precision contact chest expander, signal converter, data acquisition output unit and data-signal display are linked in sequence, and are delivered in real time on the chest expander of high precision contact by the force information that is subjected to of flexible rope with coal particles.
Described coal particles be subjected to force information after high precision contact chest expander is measured, can instantaneously be delivered on the signal converter, and voltage signal is converted to mechanical signal, obtain through the data acquisition output unit.
Described high precision contact chest expander range is 0-300mN.
Beneficial effect: the utility model adopts flexible rope to connect needs to measure stressed coal particles, effectively reduced the interference effect of external force to movement of particles, make particle in fluidized bed, be in all the time the free movement state, avoided the impact of rigid attachment pole pair movement of particles; High precision contact chest expander connects with flexible rope, make the dynamic linkage effect occurs between coal particles and mechanical meaurement device constantly, be particle instantaneous stressed can being delivered to exactly on the mechanical meaurement device by flexible rope at any time, effectively avoided because the stressed reception information error that time delay produces has improved measuring accuracy; Signal converter can will be subjected to force information to be converted to mechanical signal and to be delivered to data collector by voltage signal, overcome that direct measurement coal particles is stressed to have larger difficulty and a very large defective of measuring error, the stressed situation of change of any time in the time of can collecting coal particles and in fluidized bed, move, accuracy is higher, and error is less; Image data is shown on the data-signal display through output unit, can observe at any time particle stressed accurate numerical value and fluctuation pattern, and dynamically adjusts the fluidisation parameter according to stressed fluctuation tendency, changes the motion state of particle.Use stress measuring device and the method for particle in the dense gas solid bed, efficiently solve the stressed bottleneck that can't directly measure of random motion particle, improved simultaneously measuring accuracy, measuring error is very little, have characteristics simple in structure, as to control convenience, good reliability, can be widely used in the stressed measurement of large-size particle in other dense gas-solid multiphase flow and the monitoring of motion state.This measurement mechanism is simple in structure, easy to operate, easy to control, measuring accuracy is high, good reliability, can realize the accurate stressed measurement of the multiple particle of large scale in the dense gas-solid multiphase flow, applied range, be applicable to the stressed measurement of coal particles in the dense gas solid bed, also be applicable to the stressed measurement of large-size particle in other dense gas-solid multiphase flow, coal particles is had important value and significance in the prediction and calculation that gas-solid fluidized bed medium power scholarship and moral conduct is.
Description of drawings
Fig. 1 is the work structuring figure of coal particles stress measuring device of the present utility model.
Fig. 2 is the stressed synoptic diagram of coal particles of the present utility model in the dense gas solid bed.
Among the figure: 1, blower fan; 2, bellows chamber; 3, air pressure control device; 4, spinner-type flowmeter; 5, cloth general mood chamber; 6, airflow-distribution board; 7, gas-solid fluidized bed; 8, coal particles; 9, flexible rope; 10, high precision contact chest expander; 11, signal converter; 12, data acquisition output unit; 13, data-signal display; 14, dynamic differential pressure measurement mechanism;
M, coal particles;
G, self gravitation;
F b, fluidized-bed layer buoyancy;
F D, the fluid drag force.
Embodiment
Below in conjunction with accompanying drawing an embodiment of the present utility model is further described:
The stressed measurement of coal particles has stress measuring device in the dense gas solid bed of the present utility model, mainly is made of gas-solid fluidized bed 7, cloth general mood chamber 5, airflow-distribution board 6, flexible rope 9, high precision contact chest expander 10.Cloth general mood chamber 5 and airflow-distribution board 6 are set in gas-solid fluidized bed 7 bottom, gas-solid fluidized bed bottom and spinner-type flowmeter 4, air pressure control device 3, bellows chamber 2 and blower fan 1 are linked in sequence, gas-solid fluidized bed 7 pass through cloth general mood chamber 5 is connected with air feed system, regulates the air-flow flux by spinner-type flowmeter 4; Be connected with dynamic differential pressure measurement mechanism 14 in gas-solid fluidized bed side; Coal particles is arranged, an end of flexible rope 9 and coal particles 8 close-coupled in gas-solid fluidized bed; The other end of flexible rope 9 and high precision contact chest expander 10, signal converter 11, data acquisition output unit 12 and data-signal display 13 are linked in sequence, flexible rope 9 and coal particles 8 close-coupled, and assurance is subjected to the reliability of force information transmitting and converting; Flexible rope 9 is in linkage status with coal particles 8, can be delivered in real time on the high precision contact chest expander 10 by force information.Flexible rope 9 and high precision contact chest expander 10 have also guaranteed to be subjected to the real-time reliable delivery of force information by outreaching the support close contact; High precision contact chest expander 10 is connected with signal converter 11, is voltage signal with stressed information conversion; Signal converter 11 is converted to mechanical signal with voltage signal and is input on the data acquisition output unit 12 after signal is amplified conversion; After data acquisition output unit 12 was processed, the force information that is subjected to that directly will obtain was presented on the data-signal display 13; Dynamic differential pressure measurement mechanism 14 is installed in gas-solid fluidized bed 7 sidewall, detects in real time the fluctuation of pressure drop situation of fluidized bed, and modification stability gas speed is had vital role.Coal particles 8 be subjected to force information after high precision contact chest expander 10 is measured, can instantaneously be delivered on the signal converter 11, and voltage signal is converted to mechanical signal, obtain through data acquisition output unit 12.Described high precision contact chest expander range is 0-300mN.
The course of work: at first regulate the quiescent bed layer height in gas-solid fluidized bed 7, the height of quiescent bed layer height is 2/5 of integral bed layer height, the quiescent bed layer height is that the high-density magnet breeze is added the apparent height that fluidized bed presents later on, choosing successively granularity is respectively-0.3+0.15mm, in the high-density magnet breeze of-0.15+0.074mm and-0.074+0.045mm any adds in gas-solid fluidized bed 7, open blower fan, the pressurized air that passes into is behind airflow-distribution board 6 even distributing winds, enter fluidized bed body, make the high-density magnet breeze in gas-solid fluidized bed 7 produce fluidisation, by regulating spinner-type flowmeter control gas speed fluctuation range, through 30 seconds, after high-density magnet breeze fluidisation is stable, to slowly at the uniform velocity place with the coal particles 8 of flexible rope 9 close-coupled gas-solid fluidized bed 7 bed body, described " slowly at the uniform velocity " is when the placement coal particles enters fluidized bed, the speed of external force should keep slowly evenly, make particle minimized by the impact of external force, and then make particle in fluidized bed, do random motion; Transient change of the every generation of the movement locus of coal particles, being about to the flexible rope that instantaneous stressed information exchange crosses connection is delivered on the chest expander of contact, the instantaneous force information that is subjected to that chest expander will obtain is delivered on the signal converter, after signal converter is converted to voltage signal mechanical signal and is delivered to the data acquisition output unit, be shown on the data-signal display 13 any instantaneous stressed fluctuation information when namely obtaining coal particles and in fluidized bed, moving; After the characteristics of motion of coal particles 8 kept relative stability, data acquisition output unit 12 and data-signal display 13 obtained and demonstration coal particles 8 stressed measurement results.Described data acquisition output unit 12 and data-signal display 13 are united use, detect in real time coal particles 8 and be subjected to the fluctuation situation in gas-solid fluidized bed 7.After the complete fluidisation of high-density magnet breeze, open dynamic differential pressure measurement mechanism 14, detect the fluctuation situation of bed pressure drop, the fluctuation situation of dynamic differential pressure measurement mechanism 14 Real-Time Monitoring bed pressure drops, in order to come control operation gas speed by regulating spinner-type flowmeter 4 at any time, guarantee the reliable and stable of coal particles 8 stressed measurement results.
Work as coal particles
MWhen in the dense gas solid bed, moving, mainly be subjected to self gravitation
G, fluidized-bed layer buoyancy
F bWith the fluid drag force
F DActing in conjunction, other stressed order of magnitude is less, can ignore.The result that the stress measuring device of coal particles obtains in the dense gas solid bed is coal particles
MComprehensively stressed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336986 CN202757723U (en) | 2012-07-12 | 2012-07-12 | Device for measuring stress of coal particles in concentrated phase gas-solid fluidized bed |
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| CN 201220336986 CN202757723U (en) | 2012-07-12 | 2012-07-12 | Device for measuring stress of coal particles in concentrated phase gas-solid fluidized bed |
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| CN202757723U true CN202757723U (en) | 2013-02-27 |
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| CN 201220336986 Expired - Lifetime CN202757723U (en) | 2012-07-12 | 2012-07-12 | Device for measuring stress of coal particles in concentrated phase gas-solid fluidized bed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778322A (en) * | 2012-07-12 | 2012-11-14 | 中国矿业大学 | Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed |
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2012
- 2012-07-12 CN CN 201220336986 patent/CN202757723U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778322A (en) * | 2012-07-12 | 2012-11-14 | 中国矿业大学 | Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed |
| CN102778322B (en) * | 2012-07-12 | 2014-04-16 | 中国矿业大学 | Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed |
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Granted publication date: 20130227 Effective date of abandoning: 20140416 |
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| AV01 | Patent right actively abandoned |
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