CN1785770A - Fixed fluidized bed powder metering and distributing delivery device and methed of realizing high stability transferring and distributing powder - Google Patents
Fixed fluidized bed powder metering and distributing delivery device and methed of realizing high stability transferring and distributing powder Download PDFInfo
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Abstract
The present invention discloses a fixed fluidized bed powder body metering, distributing and conveying equipment and method for implementing high-stable conveyance and distribution of powder body. Said invention includes the following several components: fluidizing tank, powder body feeding pipe, gas feeding pipe, powder body level indicator, fluidized gas distributor, mechanical stirring paddle and power-conveying pipeline, etc. Besides, said invention also provides its extensive application fields.
Description
Technical field
The invention belongs to powder metering distribution delivery technology and device in the powder technology.
Background technology
Powder material is a kind of intermediateness between solid and liquid.Someone calls material the 4th attitude that is positioned at outside solid, liquid, the gas to it.In view of its special physical property, developed into a kind of special powder technology subject, set about test, the processing of powder and measure with and the research of mechanics, optics, acoustic connection.Because the configuration of surface of powder material particle shape, particle Set Status and powder material is vacillated the physical property of powder between solid and liquid state, make the stable metering of powder, conveying and storage all compare difficulty.
Experts and scholars both domestic and external have done a large amount of tests and research to the close conveying aspect mutually of powder, but the article of delivering for the stability in the close phase course of conveying of powder and continuity problem aspect seldom, and ask often the metering of powder, distribution and load transfer device separately being studied and discussed in concentrated phase conveying aspect, there are problems such as the large and small flow powder metering of flow transient fluctuation inaccuracy and distribution powder lack of homogeneity in prior art always to powder concentrated phase conveying aspect.
Summary of the invention
The invention provides a kind of new process and equipment, can satisfy of the requirement of part industry stability, continuity and accurate measurement in the powder high concentration course of conveying.
Technical scheme of the present invention is as follows:
Fixed fluidized bed powder metering distributes sending set, include streaming tank, it is characterized in that the streaming tank top is linked with the powder feed pipe, the bottom of streaming tank is linked with the fluidizing gas air inlet pipe, the powder level-sensing device is installed on the streaming tank, the lower end is equipped with filter cloth fluidizing gas sparger in the streaming tank cavity, the mechanical agitation slurry is installed in the streaming tank, paddle horizontal arrangement and close filter cloth fluidizing gas sparger top, the sidewall first line of a couplet is connected with the powder feeding pipeline above stirring blade, and pressure control valve is installed on the streaming tank.
The paddle of described mechanical agitation slurry is that horizontal direction is sheared.The paddle of described mechanical agitation slurry is flat slurry.Described powder feeding pipeline is 1/many, and the caliber of pipeline is identical/difference.
Use the fixed fluidized bed powder metering distribution device and realize that high stable is carried and the method for distribution powder, it is characterized in that carrying powder to streaming tank through feed pipe, through the fluidizing gas air inlet pipe to streaming tank transportation flow oxidizing gases, the powder feeding pipeline is connected to and is subjected on the powder equipment, mechanical agitation slurry rotating speed is 60-300 rev/min, keep stabilization of speed, control powder inlet amount, guarantee that material level L is stable in the streaming tank, control flows gasification scale of construction Q1 keeps setting value, fluidized gas cloth gas sparger after filtration enters into streaming tank uniformly, fluidized gas is by the gas speed 0.002～0.01m/s of gas distributor, by the mechanical agitation slurry powder and gas are mixed admittedly, and has a good flowing power, control streaming tank pressure inside P1 keeps setting value, and control flows oxidizing gases stabilized uniform flows out from the streaming tank top simultaneously, and the gas that flows out streaming tank can be recycled after pressurization; Utilize and press P1 and the pressure differential deltap P=P1-P2 that is subjected to press in the powder equipment between P2 in the streaming tank, to being subjected in the powder equipment, by realizing the stable of each parameter, realization can distribute, balanced conveying powder, and measurable with powder conveying.
The interface of each road powder feeding pipeline on the streaming tank sidewall is in same level height, near mechanical agitation.
The powder feeding pipeline that has is delivered directly to and is subjected to powder equipment, and the powder feeding pipeline that has is through the powder acceleration equipment, thereby after making the powder acceleration of its conveying, kinematic velocity reaches setting value, is transported to be subjected to powder equipment again.
The present invention adopts a streaming tank equipment to finish powder conveying, the work of metering and multichannel powder feeding, metering outfit adopts computer control system, computing machine accurately calculates the amount of carrying powder according to predefined invariant parameter and collection in worksite parameter, invariant parameter comprises: the height of the quantity friction coefficient drag coefficient mechanical agitation rotating speed fluidizing gas density fluid bed of the real density powder feeding pipes diameter powder feeding pipes length powder feeding pipe of the bulk density powder of diameter of particle powder etc., acquisition parameter comprises: the gaseous tension device interior pressure etc. that is pollinated in the fluidization gas fluidisation difference bed.Characteristics such as parameter control feeding coal such as gaseous tension in the material height by the computer regulated streaming tank, the flow of fluidizing gas, the fluid bed, this flow process have that equipment is simple, technological process is short, gas-solid ratio is high, stable height and continuity are strong.
Below illustrate this powder metering of the present invention from the acceleration of the fluidisation of powder, powder metering, powder granule and computer control system and distribute conveying principle.
The fluidisation of powder
The powder rheomorphism is that powder has good fluidity under high gas-solid ratio and gas-solid mixes, and therefore jar interior powder fluidization quality plays crucial effects to realizing high stable, high concentration and successional powder conveying.
Gas distributor version is a lot, and straight hole fluidisation nozzle, turbulence nozzle filled type multihole distributor etc. are arranged, and the shortcoming of these devices is fluidizing gas skewness, and fluid effect is poor, carries unstable.The present invention adopts multilayer filter cloth sparger to add churned mechanically method, has solved the fluidised problem of powder, for the powder conveying of high stable, high concentration is created necessary condition.
Fluidization gas Q1 is most important to the stable effect of powder fluidisation and gas-solid ratio, and fluidization gas Q1 causes the powder fluidization bad less, and course of conveying stops up easily; Fluidization gas Q1 causes that gas-solid is low in the powder fluid bed, gas-solid is unstable more, finally causes powder metering inaccuracy and moment powder flow fluctuation.
The position of powder feeding pipeline is stable extremely important to powder conveying.By experimental work and simulation, gas is in the position of pressing close to mechanical agitation paddle height and position and Lve Gao, and gas can fully mix with powder and is in more stable zone, is referred to as the stable region; Along with the rising of gas, the pressure decay of gas is separated out bubble in the powder, be referred to as the bubble district; It is big that bubble constantly becomes in uphill process, to such an extent as to break, this is referred to as boiling section.Therefore, for guaranteeing the stability of powder delivery, the position of powder feeding pipeline will be selected near the stable region.
Mechanical agitation helps out: destroy the formation of bubble, strengthen the effect of fluidisation, find from the experimental observation of little test fluidizer: when identical fluidization gas, when fluid bed stir speed (S.S.) speed is lower than 30 rev/mins of kinds, fluid effect with do not have mechanical agitation the same; Stir speed (S.S.) speed is 60～120 rev/mins of kinds, and the split fluidisation is had the effect of enhancing, and stir speed (S.S.) speed is higher than 300 rev/mins of kinds, can destroy fluidisation.When identical fluidization gas and mechanical agitation speed, the shape that changes paddle also has certain influence to fluidisation.
Powder metering
Discuss as can be known according to the article that domestic and international experts and scholars are a large amount of, the sectional area S that exports by the fluid bed side discharge gas-solid mixed flow scale of construction and Δ P (streaming tank and the pressure reduction that is subjected to powder equipment), powder has very strong correlativity.The powder conveying pipeline gets diameter and long can deciding, and the relational expression of the operational throughput of powder and Δ P is also corresponding to be determined.According to this relational expression, adopt computing machine to calculate corresponding Δ P according to the powder conveying amount, computer program is realized the target of accurate measurement by the automatic guidance valve regulation Δ P value of meeting the requirements of.
The acceleration of powder granule
Can in the powder conveying pipeline, increase acceleration device according to actual needs, enter the equipment of being pollinated after making powder accelerate to certain speed.
Computer control system
Control system is as the pilot-plant nervous centralis, and its main task is the accuracy control powder sending quantity and guarantees the stable and operation safely of device.
The invention effect
(1) only adopts an equipment to finish the conveying of powder, measure and share out the work, reduced the systems communicate error to greatest extent, reduced the equipment investment maintenance workload simultaneously.
(2) not pulsation in the powder conveying process, the powder conveying amount moment error less than 5%;
(3) the 1 road or the uniform and stable conveying powder of multiple-way duct; Each pipeline convey error is less than 5% under the identical situation of powder feeding caliber;
(4) can be to the stable powder of carrying of pressure container.
(5) energy consumption is the stable powder of carrying under 120～250 high gas-solid ratios in gas-solid ratio, reduces expenditure of energy, reduces pipe diameter and abrasion loss;
(6) owing to gas-solid ratio height in the course of conveying, the powder flowing velocity is low, is subjected to powder equipment can not use dusting equipment or the very little dusting equipment of use just can reach regulated discharge standard, reduces the equipment investment maintenance workload.
(7) quicken gas by powder, can realize gas-solid ratio 120 or more situation under (12～35m/s) to being subjected to powder equipment to advance powder at a high speed.
Description of drawings
Accompanying drawing is powder conveying of the present invention, distribution, gauging device structural representation.
The specific embodiment
Referring to Fig. 1.
Powder 7 adopts computing machine and frequency converter to adjust feeder motor 11 rotating speeds by entering into powder streaming tank 14 for tube cell through feeder 12, and the feeding coal of control feeder 12 guarantees that material level L is stable in the streaming tank.
Internally piloted valve 1 computerizeds control, control flows gasification Q1 measures setting value, fluidized gas enters into powder streaming tank 14 uniformly through gas distributor 9, by mechanical agitation 8 the powder gas-solid is mixed, and have good flowing power, and the internally piloted valve 6 that computerizeds control, control streaming tank 14 pressure inside P1 are to setting value, control flows gasification Q1 stabilized uniform flows out from streaming tank 14 tops simultaneously, and the gas Q1 that flows out streaming tank 14 can be recycled after pressurization.
Utilize tank pressure P1 and powder conveying is subjected in the powder equipment 4 by the pressure differential deltap P of 2 of powder equipment pressure P, the control Δ P and the diameter of powder feeding pipeline 10,15, the purpose that the length adjustment powder sending quantity reaches metering.Multichannel powder feeding pipeline 10,15 is distributed in position (stable region in the streaming tank) on the lower side, fluidisation dump tank 14 sides, guarantees each pipeline powder sending quantity homogeneity.
According to actual needs, powder feeding pipeline 15 is subjected to powder equipment 4 without quickening to be delivered directly to, powder feeding pipeline 10 powders 7 are through powder acceleration equipment 3, the internally piloted valve 2 that computerizeds control makes accelerating gas Q2 flow reach setting value, thereby make the powder kinematic velocity reach the technological requirement value, quicken the back powder conveying to being subjected to powder equipment 4.
The powder feeding pipeline can one or multichannel according to actual needs, not only can many powder feeding pipeline carry powder simultaneously but also powder feeding when can each powder feeding pipeline different, not only can equipment powder feeding of many powder feeding pipe road directions but also can the powder feeding of many powder feeding pipe road direction distinct devices.
Fluidizing gas can be the gas that air, nitrogen, hydrogen, oxygen, vinyl chloride, argon gas etc. do not react and do not liquefy in powder granule in fluid mapper process as required.If fluidizing gas is to be worth higher gas, can adopt to enter streaming tank again after recycle compressor or the blower fan supercharging and recycle.
Need powder granule to enter into the situation that is subjected to powder equipment fast, use the powder acceleration equipment, the powder granule kinematic velocity is accelerated to 12～35m/s.Accelerating gas can be the gas that air, nitrogen, hydrogen, oxygen, vinyl chloride, argon gas etc. do not react and do not liquefy in powder granule in fluid mapper process as required.
Above-mentioned powder delivery system is used following each example, and explanation in detail:
Example 1:
The hot plasma Coal Pyrolysis is directly made the acetylene dust feeder and is used
(1), be in the φ 500mm streaming tank with the coal dust diameter of packing into, computer control system is set Q1=60NM
3/ h;
Q2=10NM
3/ h; Powder-feeding amount=2500kg/h; Speed of agitator=200 rev/min; The rotating speed of feeder feeds back automatically in the streaming tank material level.Fluidizing gas Q1 and accelerating gas Q2 are nitrogen
(2), powder feeding pipe diameter phi 6mm, powder feeding pipe length 10m, 4 powder feeding pipe simultaneously to a plasma reactor for powder.
(3), computer control system is set powder-feeding amount=2500kg/h;
(4), the pressure 0.05～0.2Mpa of plasma reactor, temperature is 1800～3000 ℃.
The result: actual powder sending quantity 2450kg/h, powder granule enters into the speed 28m/s of plasma reactor, and the error of per second is 4%.
Example 2
Plastic working industry dust feeder is used
(1), 10 plastic extruding forming machines, each needs the amount difference of plastic powders, needs the asynchronism(-nization) situation with plastic powders.Technology is that every plastic extruding forming machine all has a cover powder metering and a load transfer device at present.
(2), to adopt a diameter be φ 1000mm powder fluidisation pay-off, fluidizing gas Q1 is an air, computer control system is set Q1=100NM
3/ h; Speed of agitator=200 rev/min; The rotating speed of feeder feeds back automatically in the streaming tank material level.Connect the powder feeding pipeline (according to putting and need plastic powders amount design in every plastic extruding forming seat in the plane) of 10 different-diameters and length in the streaming tank side.
(3), computer control system is set Q1; Speed of agitator; The rotating speed of feeder feeds back automatically in the streaming tank material level.
Fluidisation tank pressure P1 is a steady state value
(4), according to each plastic extruding forming machine needs, computer control system open each pipeline on internally piloted valve, realize one for the plastic powders of powder equipment to the different amounts of 1～10 plastic extruding forming machine supply.
Example 3
Add the nano-calcium carbonate powder in the pvc response process
(1), polyvinyl chloride sends out to answer in the process and adds the nano-calcium carbonate powder, intensity cost-cutting that can the reinforced plastics goods.Technology is for to disperse the nano-calcium carbonate calcium powder at aqueous phase at present, being driven into pressure with high-pressure hydraulic pump then is in the 0.8Mpa polymeric kettle, because the nano-calcium carbonate calcium powder is an oil wet grain, in the aqueous phase difficulties in dispersion, need to add inhibiter and disperse the operation of pump long period, done shortcoming like this:
A, inhibiter cause bad side reaction easily;
B, the operation of dispersion pump long period are grown up nano particle, lose the effect that increases plastic product intensity.
Adopting vinyl chloride gas is that dispersed medium just can be good at overcoming the above problems.
(2), to adopt a diameter be φ 500mm powder fluidisation pay-off, fluidizing gas Q1 is a vinyl chloride gas
Computer control system is set Q1=100NM
3/ h; Speed of agitator=100 rev/min; The rotating speed of feeder feeds back automatically in the streaming tank material level.
(3), connect 8 diameter phi 35mm powder feeding pipelines, according to every polymeric kettle Position Design powder feeding pipe length, extreme length and minimum length are than less than 3 times, and 1 powder feeding pipe is to a polymeric kettle in the streaming tank side.
(4), polymeric kettle pressure is under the 0.8Mpa condition, computer control system is set at every turn and is injected the 5000kg powder to a polymeric kettle.
Claims (7)
1, fixed fluidized bed powder metering distributes sending set, include streaming tank, its feature is linked with the powder feed pipe at hand streaming tank top, the bottom of streaming tank is linked with the fluidizing gas air inlet pipe, the powder level-sensing device is installed on the streaming tank, the lower end is equipped with filter cloth fluidizing gas sparger in the streaming tank cavity, the mechanical agitation slurry is installed in the streaming tank, paddle horizontal arrangement and close filter cloth fluidizing gas sparger top, the sidewall first line of a couplet is connected with the powder feeding pipeline above stirring blade, and pressure control valve is installed on the streaming tank.
2, fixed fluidized bed powder metering according to claim 1 distributes sending set, and the paddle that it is characterized in that described mechanical agitation slurry is that horizontal direction is sheared.
3, fixed fluidized bed powder metering according to claim 1 distributes sending set, it is characterized in that the paddle of described mechanical agitation slurry is flat slurry.
4, fixed fluidized bed powder metering according to claim 1 distributes sending set, it is characterized in that described powder feeding pipeline is 1/many, and the caliber of pipeline is identical/difference.
5, application rights requires 1 described fixed fluidized bed powder metering distribution device to realize that high stable is carried and the method for distribution powder, it is characterized in that carrying powder to streaming tank through feed pipe, through the fluidizing gas air inlet pipe to streaming tank transportation flow oxidizing gases, the powder feeding pipeline is connected to and is subjected on the powder equipment, mechanical agitation slurry rotating speed is 60-300 rev/min, keep stabilization of speed, control powder inlet amount, guarantee that material level L is stable in the streaming tank, control flows gasification scale of construction Q1 keeps setting value, fluidized gas cloth gas sparger after filtration enters into streaming tank uniformly, fluidized gas is by the gas speed 0.002～0.01m/s of gas distributor, by the mechanical agitation slurry powder and gas are mixed admittedly, and has a good flowing power, control streaming tank pressure inside P1 keeps setting value, and control flows oxidizing gases stabilized uniform flows out from the streaming tank top simultaneously, and the gas that flows out streaming tank can be recycled after pressurization; Utilize and press P1 and the pressure differential deltap P=P1-P2 that is subjected to press in the powder equipment between P2 in the streaming tank, to being subjected in the powder equipment, by realizing the stable of each parameter, realization can distribute, balanced conveying powder, and measurable with powder conveying.
6, method according to claim 5 is characterized in that the interface of each road powder feeding pipeline on the streaming tank sidewall is in same level height, near mechanical agitation.
7, method according to claim 5 is characterized in that the powder feeding pipeline that has is delivered directly to be subjected to powder equipment, and the powder feeding pipeline that has is through the powder acceleration equipment, thereby after the powder of its conveying was quickened, kinematic velocity reached setting value, is transported to be subjected to powder equipment again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100955507A CN100564206C (en) | 2005-11-09 | 2005-11-09 | Fixed fluidized bed powder metering and distributing delivery device and realization high stable are carried and the method for distributing powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100955507A CN100564206C (en) | 2005-11-09 | 2005-11-09 | Fixed fluidized bed powder metering and distributing delivery device and realization high stable are carried and the method for distributing powder |
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| CN1785770A true CN1785770A (en) | 2006-06-14 |
| CN100564206C CN100564206C (en) | 2009-12-02 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101323398B (en) * | 2008-07-18 | 2011-06-08 | 东南大学 | Pneumatic conveying bucket flow regulation apparatus and control method |
| CN102216182B (en) * | 2008-11-12 | 2015-04-15 | 埃克森美孚研究工程公司 | Gasifier injection system |
| CN104787581A (en) * | 2015-02-09 | 2015-07-22 | 杭州市特种设备检测研究院 | Small-flow pneumatic feeder for feeding gasification furnace |
| CN105173746A (en) * | 2014-06-10 | 2015-12-23 | 科林工业技术有限责任公司 | Method and device for increasing pressure in bulk material container |
| CN106494891A (en) * | 2016-12-07 | 2017-03-15 | 河南理工大学 | A kind of mineral grain eddy flow air-transport system |
| CN107628444A (en) * | 2017-10-16 | 2018-01-26 | 东莞市联洲知识产权运营管理有限公司 | A kind of pneumatic feeding device of toxic chemical powder |
| CN111620126A (en) * | 2020-05-28 | 2020-09-04 | 北京羿腾时代科技有限公司 | Powder feeding equipment with anti-hardening function |
| CN113104590A (en) * | 2021-04-06 | 2021-07-13 | 上海煜铠智能科技有限公司 | Vacuum conveying horizontal powder tank device |
| WO2022193621A1 (en) * | 2021-03-18 | 2022-09-22 | 煤科院节能技术有限公司 | Automatic control method and system for powder feeding system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2097691U (en) * | 1991-07-19 | 1992-03-04 | 中国矿业大学 | Fluidized bed coal dry method grading plant |
| CN2114124U (en) * | 1991-11-08 | 1992-08-26 | 中国科学院工程热物理研究所 | Multi-layer vertical fluid-bed dryer |
| CN2478983Y (en) * | 2000-10-27 | 2002-02-27 | 王敏 | Fluidized device |
| CN2498116Y (en) * | 2001-09-12 | 2002-07-03 | 青岛橡胶机械厂 | Power transporting and conveying container |
| JP3576518B2 (en) * | 2001-10-17 | 2004-10-13 | 月島機械株式会社 | Fluidized bed dryer |
| CN1274568C (en) * | 2005-03-25 | 2006-09-13 | 东南大学 | Dense phase pneumatic transmission feeding device and method |
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- 2005-11-09 CN CNB2005100955507A patent/CN100564206C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323398B (en) * | 2008-07-18 | 2011-06-08 | 东南大学 | Pneumatic conveying bucket flow regulation apparatus and control method |
| CN102216182B (en) * | 2008-11-12 | 2015-04-15 | 埃克森美孚研究工程公司 | Gasifier injection system |
| CN105173746A (en) * | 2014-06-10 | 2015-12-23 | 科林工业技术有限责任公司 | Method and device for increasing pressure in bulk material container |
| CN105173746B (en) * | 2014-06-10 | 2018-03-27 | 科林工业技术有限责任公司 | Method and apparatus for improving pressure in bulk material container |
| CN104787581A (en) * | 2015-02-09 | 2015-07-22 | 杭州市特种设备检测研究院 | Small-flow pneumatic feeder for feeding gasification furnace |
| CN106494891A (en) * | 2016-12-07 | 2017-03-15 | 河南理工大学 | A kind of mineral grain eddy flow air-transport system |
| CN107628444A (en) * | 2017-10-16 | 2018-01-26 | 东莞市联洲知识产权运营管理有限公司 | A kind of pneumatic feeding device of toxic chemical powder |
| CN111620126A (en) * | 2020-05-28 | 2020-09-04 | 北京羿腾时代科技有限公司 | Powder feeding equipment with anti-hardening function |
| WO2022193621A1 (en) * | 2021-03-18 | 2022-09-22 | 煤科院节能技术有限公司 | Automatic control method and system for powder feeding system |
| CN113104590A (en) * | 2021-04-06 | 2021-07-13 | 上海煜铠智能科技有限公司 | Vacuum conveying horizontal powder tank device |
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Granted publication date: 20091202 Termination date: 20111109 |