CN108579654A - A kind of fluid bed of Ordering ultra-fine grain mixing - Google Patents
A kind of fluid bed of Ordering ultra-fine grain mixing Download PDFInfo
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- CN108579654A CN108579654A CN201810293472.9A CN201810293472A CN108579654A CN 108579654 A CN108579654 A CN 108579654A CN 201810293472 A CN201810293472 A CN 201810293472A CN 108579654 A CN108579654 A CN 108579654A
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- fine grain
- diversion pipe
- fluid bed
- ordering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/006—Baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/30—Mixing gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/30—Mixing gases with solids
- B01F23/34—Mixing gases with solids by introducing gases in solid materials, e.g. in masses of powder or particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/30—Mixing gases with solids
- B01F23/36—Mixing gases with solids by mixing in fluidised bed state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2455—Stationary reactors without moving elements inside provoking a loop type movement of the reactants
- B01J19/246—Stationary reactors without moving elements inside provoking a loop type movement of the reactants internally, i.e. the mixture circulating inside the vessel such that the upward stream is separated physically from the downward stream(s)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The present invention discloses a kind of fluid bed of Ordering ultra-fine grain mixing, including be arranged the diversion pipe among the outer barrel, the annular region being arranged between the diversion pipe and outer barrel grid type baffle, be arranged below diversion pipe and grid type baffle air distribution plate, be arranged among the air distribution plate and central jet pipe corresponding with diversion pipe.The present invention can be mixed with Ordering ultra-fine grain fluid bed granulate, strengthened bed endoparticle and circulated, improve gas-particle two-phase contacting efficiency, improved ultra-fine grain well and fluidized, stable, for ease of maintenaince.
Description
Technical field
The invention belongs to chemical equipment technical fields, are related to a kind of ultra-fine grain fluidized bed reaction.
Background technology
Ultra-fine grain (refer generally to size and be less than 10 particles) is widely used in the necks such as chemical industry, electronics, ceramics, biomedicine
Domain.Ultra-fine grain often exists in the form of agglomerate because its surface viscosity is big during synthesizing, transporting, store etc..Fluid bed due to
Its good gas-solid mixing, efficient heat and mass, and can effectively solve the keys such as the continuous smooth removal reactor of particle and ask
Topic, fluidized bed applications are more and more applied in ultra-fine grain, such as coat functional film on the surface of ultra-fine grain
Deng.But since Ultra-fine-particle Size is smaller, intergranular viscosity is larger, in traditional ultra-fine grain fluid bed, often goes out
Existing channel or other bad fluidisation situations.Therefore, the application of ultra-fine grain in a fluidized bed, it is necessary first to solve ultra-fine grain
It is normal fluidisation and mixing.In order to realize that the stabilization fluid of ultra-fine grain further realizes ultra-fine grain in fluid bed
Preferably mixing and reaction, need to be improved fluidization quality of the ultra-fine grain in conventional fluidization bed.
Measure usually in terms of improvement ultra-fine grain fluidization quality mainly has, and particle surface modification, shakes at sound field auxiliary fluidisation
Dynamic auxiliary fluidisation, magnetic field auxiliary fluidisation, pulse fluidisation, stirring auxiliary fluidisation etc., these measures mainly make ultra-fine grain fluidisation by
Agglomerate change of flow is even inflation flow pattern.Although to a certain degree may be used in traditional gas-solid fluidized bed upper addition auxiliary fluidisation measure
To achieve the purpose that improve ultra-fine grain fluidisation, still, from the point of view of particle mixing, even inflation fluidisation is detrimental to particle
Mixing.In addition, it is traditional it is gas-solid fluidized bed in, usually can with it is bladdery formed, rise, grow up, merge, explosion etc. one
Serial behavior promotes the strong back-mixing of an endoparticle, is equally unfavorable for the mixing of particle.Due to the density of the secondary agglomerate of ultra-fine grain
It is very low, lead in ultra-fine grain fluid bed the density contrast of discrete phase and fluidizing agent and tradition is gas-solid fluidized bed differs greatly,
But with liquid-solid fluid bed there are more similarities.
Invention content
Technical problem：The present invention provides a kind of fluid bed of Ordering ultra-fine grain mixing, can be ultra-fine with Ordering
The mixing of grain fluidized bed particle strengthens bed endoparticle and circulates, improves gas-particle two-phase contacting efficiency, stable, be easy to tie up
It repaiies.
Technical solution：The fluid bed of the Ordering ultra-fine grain mixing of the present invention, including be arranged among the outer barrel
Diversion pipe, the annular region being arranged between the diversion pipe and outer barrel grid type baffle, be arranged in diversion pipe and grid
Air distribution plate below formula baffle is arranged among the air distribution plate and central jet pipe corresponding with diversion pipe.
Further, in fluid bed of the present invention, diversion pipe top is higher than the upper edge of grid type baffle and is less than outer barrel top
The gas vent of setting, diversion pipe bottom end are flushed with the lower edge of grid type baffle.
Further, in fluid bed of the present invention, air distribution plate is concave structure.
Further, in fluid bed of the present invention, there are a spacing in central jet pipe upper end and diversion pipe lower end, on central jet pipe
End is higher than the centre bore to connect therewith on air distribution plate.
In specific embodiments of the present invention, the lower end of diversion pipe is located above air distribution plate, and upper end is less than gas vent and summary
Higher than grid type baffle.For grid type retaining device between diversion pipe and the annular space of outer barrel, lower end is concordant with diversion pipe.Concrete structure
It such as Fig. 2, is made of multiple coaxial seamless pipes, the caliber difference of adjacent steel pipe is equal.It is axially connected between steel pipe, connector will be between pipe
Annular space is divided into 8 parts.Central jet pipe is stretched by fluidized wind inlet, and caliber should be less than diversion pipe, the high cloth outputting wind of upper end level
Plate.Due to the presence of grating type baffle, the flowing of bed endoparticle will be different from traditional fluid bed, equal for the cloth wind of air distribution plate
Even property requires to reduce.Therefore, air distribution plate can be uniform or non-homogeneous hole, while can also be plate or concave.
The method for carrying out particle mixing using the fluid bed of Ordering ultra-fine grain of the present invention mixing, it is preferred that emphasis is need
It is passed through the gas of different wind speed.Fluidized wind, into fluidized bed, ensures the fluidized state of bed material via air distribution plate.It supplements in air quantity warp
It is passed through in heart jet pipe, supplement air quantity wind speed should be higher than that fluidized wind wind speed, be mainly used for pushing the recycle stream of bed material in fluid bed
It is dynamic so that gas carries bottom bed material and reaches reactor head via diversion pipe, and redisperse is flowed through to grid type baffle in annular space
The grid type baffle of setting, turns again to fluidized-bed bottom.
Interior cycle thought is introduced ultra-fine grain fluidization by the present invention, and by the way that grating type baffle controls particle is arranged in ring
The movement of Ordering bed endoparticle and mixing are realized in the movement in shape area, can be widely applied to the preparation of ultra-fine grain ultra-fine grain.This
Diversion pipe is arranged in region between invention in the reactor, and grating type baffle is arranged in the annular region between diversion pipe and outer barrel,
High-speed flow carries ultra-fine grain and moves upwards in diversion pipe, and ultra-fine grain reaches at draft tube outlets, is distributed to annular region
It in each grid, flows downward via grid channel, again returns to diversion pipe, form order cycle.It is intended that diversion pipe
Interior air-flow quickly carries ultra-fine grain and flows up, and grid baffle promotes particle in annular region flat-pushing flowing downwards, presses down simultaneously
Make pellet radial motion so that particle is consistent in the residence time destribution of annular region, forms the ordered mixing of particle.
Advantageous effect：Compared with prior art, the present invention haing the following advantages：
Compared with traditional ultra-fine grain fluid bed, this fluidized bed plant increases grid type baffle, diversion pipe in inside
With central jet pipe, it is put forward for the first time installation grid type baffle, is mixed with reinforcing ultra-fine grain in bed.
In ultra-fine grain fluid mapper process, the production of various bad phenomenons is caused due to the presence of particles' interaction power
It is raw, such as channel, it can be very good to improve ultra-fine grain fluidisation.
Meanwhile it bladdery would generally be generated in fluid mapper process.Grid type baffle will be divided into different areas inside fluid bed
Domain can effectively be crushed gas and inhibit the merging of bubble, to avoid the generation of air pocket, the mixing to ultra-fine grain in bed
And the uniformity etc. of reaction plays good facilitation.
Grid type baffle radially divides region, prevents the radial diffusion of gas, gas to prolong axial rising, keeps particle dense
Degree is radially more evenly distributed.Annular space area is acted on by wall effect, radial velocity, concentration, uniformity of temperature profile, based on it is anti-
Area is answered to provide good condition.
Due to the presence of central jet pipe so that bed endoparticle can be moved upwards along diversion pipe, reach throwing after top
It trickles down into grid type baffle area, moves downward, the design of concave air distribution plate is more conducive to ultra-fine grain in bed and is gathered in stream
Change bed bottom, whole process forms annularly flow.
Grid type baffle can effectively inhibit the influence of solid back-mixing, improve gas-solid contact efficiency in fluid bed, improve
The residence time destribution of particle in a fluidized bed, improves the uniformity of fluidized-bed reactor.
Description of the drawings
Fig. 1 is Ordering ultra-fine grain fluid bed granulate mixing arrangement structural schematic diagram；
Fig. 2 is the sectional view of grid type baffle in the present invention.
Reference numeral is in figure：Outer barrel 1, grid type baffle 2, diversion pipe 3, air distribution plate 4, central jet pipe 5.
Specific implementation mode
Technical solution of the present invention is described in detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
The embodiment.
Fig. 1 is the structural schematic diagram of the fluid bed of Ordering ultra-fine grain of the present invention mixing, including outer barrel 1, grid type
Baffle 2, diversion pipe 3, air distribution plate 4, central jet pipe 5 etc., diversion pipe 3 are arranged among the outer barrel 1, and grid type baffle 2 is set
2 of the annular region between diversion pipe 3 and outer barrel 1 are set, air distribution plate 4 is arranged below diversion pipe 3 and grid type baffle 2, in
The setting of heart jet pipe 5 is among the air distribution plate 4 and corresponding with diversion pipe 3.
The basic thought of the present invention is to promote bed endoparticle to mix using the novel inner member of ultra-fine grain fluid bed.
When carrying out operation using the ultra-fine grain fluid bed of the present invention, it is passed through with reaction gas in ultra-fine grain fluid bed
Ultra-fine grain is fluidized and is reacted through air distribution plate 4 by the gas carrier of body.Additional supplement is passed through from center jet pipe 5 simultaneously
Air quantity (gas carrier) carries fluidized-bed bottom ultra-fine grain to diversion pipe, and bed material is distributed to grid type baffle 2 later,
Fluidized-bed bottom is returned downward to, then is risen by diversion pipe and forms internal particle circulation flowing.This ultra-fine grain circulates, and promotees
Into the hybrid reaction of reaction gas and ultra-fine grain.In the present embodiment, Ordering ultra-fine grain mixed fluidized bed is mainly used for
Push the interior cycle of ultra-fine grain in fluid bed so that reaction gas is sufficiently mixed and reacts with ultra-fine grain.And ultra-fine
The change of grain flow pattern avoids the generation of air pocket, mitigates and reacts uneven or ultra-fine grain loss.
Diversion pipe 3 is placed among outer barrel 1 in the present embodiment, and upper end goes out higher than grating type baffle and less than fluidized bed gas
Mouthful.Grid type baffle 2 is placed in the annular space that diversion pipe 3 is constituted with outer barrel 1, and lower end is concordant with diversion pipe 3.
The upper and lower ends of diversion pipe 3 and grid type baffle 2 are fixed by outer barrel 1 in a preferred embodiment of the present invention.
In a preferred embodiment of the present invention, air distribution plate 4 uses concave, and ultra-fine grain can be promoted to be formed in bed and followed
Ring.
Central jet pipe 5 is arranged among fluidized wind entrance in a preferred embodiment of the present invention, and under diversion pipe
Side.Riser upper end is higher than air distribution plate, and specific height should adjust in force, in the hope of optimum efficiency.
The foregoing is merely the better embodiment of the present invention, protection scope of the present invention is not with the above embodiment
Limit, as long as those of ordinary skill in the art should all be included in power according to equivalent modification or variation made by disclosed content
In protection domain described in sharp claim.
Claims (4)
1. a kind of fluid bed of Ordering ultra-fine grain mixing, which is characterized in that the fluid bed includes that outer barrel (1), setting exist
The grid type of the intermediate diversion pipe (3) of the outer barrel (1), the annular region being arranged between the diversion pipe (3) and outer barrel (1)
Baffle (2), the air distribution plate (4) being arranged below diversion pipe (3) and grid type baffle (2), setting are intermediate in the air distribution plate (4)
And central jet pipe (5) corresponding with diversion pipe (3).
2. the fluid bed of Ordering ultra-fine grain mixing according to claim 1, it is characterised in that：The diversion pipe
(3) top higher than grid type baffle (2) upper edge and less than outer barrel (1) top setting gas vent, diversion pipe (3) bottom end with
The lower edge of grid type baffle (2) flushes.
3. the fluid bed of Ordering ultra-fine grain mixing according to claim 1, it is characterised in that：The air distribution plate
(4) it is concave structure.
4. the fluid bed of Ordering ultra-fine grain mixing according to claim 1,2 or 3, it is characterised in that：In described
Heart jet pipe (5) upper end has spacing, central jet pipe (5) upper end to be higher than on air distribution plate (4) and connect therewith with diversion pipe (3) lower end
Centre bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810293472.9A CN108579654A (en) | 2018-03-30 | 2018-03-30 | A kind of fluid bed of Ordering ultra-fine grain mixing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810293472.9A CN108579654A (en) | 2018-03-30 | 2018-03-30 | A kind of fluid bed of Ordering ultra-fine grain mixing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108579654A true CN108579654A (en) | 2018-09-28 |
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ID=63625326
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810293472.9A Pending CN108579654A (en) | 2018-03-30 | 2018-03-30 | A kind of fluid bed of Ordering ultra-fine grain mixing |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0104282A1 (en) * | 1982-09-24 | 1984-04-04 | Chisso Corporation | Apparatus for granulation or coating |
| CN1095810A (en) * | 1993-03-03 | 1994-11-30 | 株式会社荏原制作所 | Pressurized internal circulating fluidized-bed boiler |
| CN101906178A (en) * | 2009-06-08 | 2010-12-08 | 住友化学株式会社 | Spouted-fluidized bed-type olefin polymerization reactor |
| CN102641685A (en) * | 2012-05-03 | 2012-08-22 | 东南大学 | Particulate matter mixing device based on internal circulating fluidized bed |
| CN102784589A (en) * | 2012-09-03 | 2012-11-21 | 青岛科技大学 | Nonmetal particle fluidized bed coating device and method for waste circuit board |
| CN105062529A (en) * | 2015-09-09 | 2015-11-18 | 陕西美斯林能源科技研究院 | Spouted fluidized bed powdered coal pyrolysis device and method |
-
2018
- 2018-03-30 CN CN201810293472.9A patent/CN108579654A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0104282A1 (en) * | 1982-09-24 | 1984-04-04 | Chisso Corporation | Apparatus for granulation or coating |
| CN1095810A (en) * | 1993-03-03 | 1994-11-30 | 株式会社荏原制作所 | Pressurized internal circulating fluidized-bed boiler |
| CN101906178A (en) * | 2009-06-08 | 2010-12-08 | 住友化学株式会社 | Spouted-fluidized bed-type olefin polymerization reactor |
| CN102641685A (en) * | 2012-05-03 | 2012-08-22 | 东南大学 | Particulate matter mixing device based on internal circulating fluidized bed |
| CN102784589A (en) * | 2012-09-03 | 2012-11-21 | 青岛科技大学 | Nonmetal particle fluidized bed coating device and method for waste circuit board |
| CN105062529A (en) * | 2015-09-09 | 2015-11-18 | 陕西美斯林能源科技研究院 | Spouted fluidized bed powdered coal pyrolysis device and method |
Non-Patent Citations (2)
| Title |
|---|
| YUEMEI ZHANG等人: "Hydrodynamic behavior of silicon particles with a wide size distribution in a draft tube spout-fluid bed", 《CHEMICAL ENGINEERING JOURNAL》 * |
| 孟胜男、胡容峰: "《药剂学》", 31 January 2016 * |
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Application publication date: 20180928 |