CN108534537A - A kind of import cyclone and spouted bed - Google Patents
A kind of import cyclone and spouted bed Download PDFInfo
- Publication number
- CN108534537A CN108534537A CN201810200850.4A CN201810200850A CN108534537A CN 108534537 A CN108534537 A CN 108534537A CN 201810200850 A CN201810200850 A CN 201810200850A CN 108534537 A CN108534537 A CN 108534537A
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- spouted bed
- nozzle
- inner tube
- cyclone
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1818—Feeding of the fluidising gas
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cyclones (AREA)
Abstract
The present invention provides a kind of import cyclone and spouted beds, including spouted bed main body, the entrance of the spouted bed main body is equipped with import cyclone, the import cyclone includes the nozzle inner tube and nozzle outer tube of coaxial arrangement, circular passage is formed between nozzle inner tube and nozzle outer tube, multiple swirl vanes are uniformly installed in circular passage, swirling inlet channel is formed between two neighboring swirl vane.The spouted bed of the present invention is compared to traditional spouted bed, and cyclone is mounted on spouted bed entrance, enhances the radial motion in spouted area and annular space area particle, momentum, heat and the mass transfer process of reinforcing particle and injection gas.
Description
Technical field
This hair is related to chemical equipment technical field, and in particular to a kind of import cyclone and spouted bed.
Background technology
The tapered spouted bed of column is a kind of efficient gas-solid contact device, has been widely used in the various lists of chemical production field
Atom operation process, for example, the drying of large granular materials, coating, granulation, scrap rubber low temperature pyrogenation and solution drying, powder
It is broken, the removal etc. of low-quality coal gasification, coal-fired flue gas desulfurization, flue gas desulfurization for waste incineration desalination acid gas, carbon dioxide.
The development of spouted bed has more than 50 years, and there are many forms for it, wherein most widely used, most typical spouted bed is column
Tapered spouted bed there is apparent 3rd area fluidal texture：Dilute phase inlet zone, Mi Xiang annular spaces area and fountain area.In inlet zone
Particle is carried secretly and gone out by high-speed gas, and makees co-current contact with gas, and after particle falls back to annular space area by fountain area, slowly
Make counter current contacting while moving down with the gas in annular space area, i.e. the media particle of spouted bed has apparent inside and outside laminar flow
Feature.But for the processing of fine particle, there is also some shortcomingss for this spouted bed：Annular space area, particularly spouted bed cone
Area's particle movement is slow, and particle agglomerate, tubercle occurs and flow dead zone even occurs, and annular space area lacks with inlet zone particle, gas
Radial mixing, and then influence and reduce the whole material treatment effeciency and chemical reaction rate of spouted bed.
Invention content
For the deficiency in above-mentioned existing spouted bed technology, the purpose of the present invention is to provide a kind of spouted beds, solve existing
Have spouted bed in technology due to there is flow dead zone, lacking radial mixing etc. caused by material treatment effeciency and chemistry
The undesirable technical problem of reaction rate.
It is a further object of the invention to provide a kind of import cyclones, and the rotation to match is provided for above-mentioned spouted bed
Flow device.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme：
The entrance of a kind of spouted bed, including spouted bed main body, the spouted bed main body is equipped with import cyclone, institute
The import cyclone stated includes the nozzle inner tube and nozzle outer tube of coaxial arrangement, and annular is formed between nozzle inner tube and nozzle outer tube
Channel is uniformly equipped with multiple swirl vanes in circular passage, swirling inlet channel is formed between two neighboring swirl vane；
The present invention also has following distinguishing feature：
Preferably, the outer diameter of the nozzle inner tube is denoted as D2, the internal diameter of the nozzle outer tube is denoted as D1, D2/D1=
0.4~0.5, D1The height of=19mm, the nozzle inner tube are 50mm.
Preferably, the swirl vane uses width for 6.4mm, and thickness is the sheet fabrication of 1mm into single thread
The helix angle of blade, the central axis in panel length direction is 45 °, the height of swirl vane and the height phase of nozzle inner tube
Deng.
Preferably, the number of the swirl vane is 8, angle of inclination of the swirl vane in circular passage
It can adjust, the adjustment angle with vertical direction is 30 °.
Preferably, the height of the spouted bed main body is denoted as H, and the diameter of spouted bed cylinder is denoted as D3, H=750mm, D3=
152mm；The spouted bed main body is the tapered spouted bed of column, the apex angle of the back taper structure at the spouted bed body inlet
It is denoted as θ, θ=60 °.
The present invention also protect a kind of import cyclone include coaxial arrangement nozzle inner tube and nozzle outer tube, nozzle inner tube and
Form circular passage between nozzle outer tube, multiple swirl vanes be uniformly installed in circular passage, two neighboring swirl vane it
Between form swirling inlet channel；
Preferably, the outer diameter of the nozzle inner tube is denoted as D2, the internal diameter of the nozzle outer tube is denoted as D1, D2/D1=
0.4~0.5, D1The height of=19mm, the nozzle inner tube are 50mm.
Preferably, the swirl vane uses width for 6.4mm, and thickness is the sheet fabrication of 1mm into single thread
The helix angle of blade, the central axis in panel length direction is 45 °, the height of swirl vane and the height phase of nozzle inner tube
Deng.
Preferably, the number of the swirl vane is 8, angle of inclination of the swirl vane in circular passage
It can adjust, the adjustment angle with vertical direction is 30 °.
Compared with prior art, the present invention beneficial has the technical effect that：
(I) spouted bed of the invention is compared to traditional spouted bed, and cyclone is mounted on spouted bed entrance, and enhancing is spouted
The radial motion in area and annular space area particle, momentum, heat and the mass transfer process of reinforcing particle and injection gas.
(II) hydrocyclone structure of the invention is simple, and using easy to operate；Cyclone of the present invention makes gas and particle
Rapid contact, improves the whole material processing capacity of spouted bed.
Description of the drawings
Fig. 1 is spouted bed body sections structural schematic diagram of the present invention；
Fig. 2 is import cyclone cross-sectional structure schematic diagram of the present invention；
Fig. 3 is import cyclone overall structure perspective diagram of the present invention；
Fig. 4 is spouted bed structural parameters value schematic diagram of the present invention；
Fig. 5 is spouted bed in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, the places H=0.15m, reality
The gas tubulence energy of example 1 and control group is applied with radial variation relation figure；
Fig. 6 is the gas tubulence energy longitudinal section cloud atlas of spouted bed (left side is embodiment 1, and the right side is control group)；
Fig. 7 is spouted bed in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, the places H=0.15m, reality
The radial particle velocity of example 1 and control group is applied with radial variation relation comparison diagram；
Fig. 8 is the radial particle velocity longitudinal section cloud atlas of spouted bed (left side is embodiment 1, and the right side is control group)；
Fig. 9 is spouted bed in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, the places H=0.15m, reality
The particle for applying example 1 and control group intends temperature with radial variation relation comparison diagram；
Figure 10 is that the particle of spouted bed intends temperature longitudinal section cloud atlas (left side is embodiment 1, and the right side is control group)；
Figure 11 is spouted bed in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, the places H=0.15m, reality
The particle for applying example 1 and control group intends temperature cross-sectional distribution cloud atlas.
Note:Fig. 6,8,10,11 be log scale, is more obvious in order to make cloud atlas color distinguish.
The meaning of each label is in figure：1- spouted beds main body, 21- nozzles inner tube (21), 22- nozzles outer tube, 3- annulars
Channel, 4- swirl vanes.
Explanation is further explained in detail to the particular content of the present invention with reference to embodiments.
Specific implementation mode
Fluid rotary flowing be used as a kind of Secondary Flow heat transfer enhancement technology, because its can be obtained with smaller resistance it is larger
Augmentation of heat transfer effect and one of research hotspot as enhanced heat exchange, the Basic Mechanism of augmentation of heat transfer is as follows：When work, fluid
Strong rotary motion is formed under the guide functions of cyclone, by fluid spirally shape under the guiding role of swirl vane
Formula is sent out, and generates quite high induction ratio, fluid is made to wash away solid wall surface at an angle, strong flow disturbance strengthens
Fluid boundary layer and momentum are transmitted and are conducted heat between fluid and wall surface.Here it is the heat conduction reinforced basic principles of cyclone.It is based on
Fluid rotary stream strengthens flow motion principle, and the present invention will realize the radial motion of fine particle by gas cyclone, destroys
The fine particle accumulation in spouted bed annular space area, circular cone area, to play the mixed process for strengthening spouted bed endoparticle and fluid.
In compliance with the above technical solution, specific embodiments of the present invention are given below, it should be noted that the present invention not office
It is limited to following specific examples, all equivalent transformations made on the basis of the technical solutions of the present application each falls within the protection model of the present invention
It encloses.
Embodiment 1：
The present embodiment provides a kind of import cyclone, as shown in Figures 2 and 3, includes the nozzle inner tube and nozzle of coaxial arrangement
Outer tube forms circular passage between nozzle inner tube and nozzle outer tube, multiple swirl vanes are uniformly equipped in circular passage, adjacent
Swirling inlet channel is formed between two swirl vanes.
As a kind of preferred embodiment of the present embodiment, import cyclone is made of metal or poly (methyl methacrylate) plate.
As a kind of preferred embodiment of the present embodiment, the outer diameter of nozzle inner tube is denoted as D2, the internal diameter of the nozzle outer tube
It is denoted as D1, D2/D1=0.5, D1The height of=19mm, the nozzle inner tube are 50mm.
As a kind of preferred embodiment of the present embodiment, swirl vane 4 uses width for 6.4mm, and thickness is that the plank of 1mm adds
Work is at the blade of single thread, and the helix angle of the central axis in panel length direction is 45 °, the height of swirl vane 4 and spray
The height of mouth inner tube 21 is equal.
A kind of preferred embodiment as the present embodiment, it is preferred that the number of swirl vane is 8, and swirl vane is in annular
Angle of inclination in channel can adjust, and the adjustment angle with vertical direction is 30 °.As the most preferably scheme of the present embodiment,
It is 30 ° with angle of inclination of the swirl vane in circular passage and does relevant simulation test.
Specifically, four vertex of swirl vane respectively with the circular passage both ends of the surface annulus seamless connectivity.In this way can
Enough ensure that cyclone has enough arrangement sizes and influences space, having can avoid hydrocyclone structure from influencing and destroy spouted bed
The flowing of fluid in annular space area.
Embodiment 2：
The present embodiment provides a kind of spouted bed, as shown in Figures 1 to 3, including spouted bed main body, the spouted bed main body
Entrance is equipped with import cyclone, and the import cyclone is using the import cyclone described in embodiment 1.
As a kind of preferred embodiment of the present embodiment, the height of spouted bed main body is denoted as H, and the diameter of spouted bed cylinder is denoted as
D3, H=750mm, D3=152mm；The spouted bed main body is to fall the tapered spouted bed of column, at the spouted bed body inlet
The apex angle of back taper structure be denoted as θ, θ=60 °.
Performance test：
The calculating parameter and boundary condition of numerical simulation are as shown in table 1, table 2.
1 spouted bed geometric dimension of table and parameters for numerical simulation setting
| Model parameter | Parameter value | Model parameter | Parameter value |
| Column diameter | 152mm | Inlet diameter | 19mm |
| Full bed height | 750mm | The static height of bed | 325mm |
| Centrum angle | 60° | Particle diameter | 1.41mm |
| Grain density | 2503kg/m3 | Particle internal friction angle | 28.5° |
| Particle maximum volume score | 0.59 | Particle maximum friction volume fraction | 0.588 |
| Particle recovery coefficient | 0.9 | Operating pressure | 0.1mpa |
| Gas density | 1.225kg/m3 | Gas viscosity | 1.7894×10-5Pa·s |
| Time step | 2×10-5s | Calculate convergence | 1×10-4 |
2 model boundary condition setting of table
When work, the high-speed gas with certain pressure enters spouted bed from import cyclone, is formed in cyclone strong
Air is spirally sent out using the rotation of outlet air and enters spouted bed lathe bed, contacted rapidly with particle by strong rotary motion,
As gas is moved upwards into inlet zone, realizes effective mixing of gas, particle, and constantly rise, enter fountain area, so
Afterwards under the influence of gravity, material enters along spouted bed wall surface in annular space area, and slowly declines in annular space area, finally due to weight
Force effect, granule materials, which return to, to be brought inlet zone by inlet gas again behind spouted bed bottom end and realizes new Matter Transfer, so
Constantly cycle realizes dynamic drying or chemical reaction.
Control group：This comparative example is in addition to the import cyclone for not installing the present invention, spouted bed lathe bed, other parameters and experiment
Condition is the same as embodiment 2.
By numerical simulation study it is found that import cyclone is as follows to the flow effect effect in spouted bed：
1, in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, H=0.15m (spouted bed annular space area)
The gas tubulence energy of place, embodiment 1 and comparative example 1 is with radial variation relation figure.
By Fig. 4, Fig. 5 changes with radial direction at waveform it can be found that there is the tubulence energy of gas in the case of cyclone to be distributed, and whole
Body is more than acylic motion device situation.The increase of gas tubulence energy is conducive to strengthen being mutually mixed for gas and fluid, strengthen gas,
Grain flowing with mix.
2, in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, H=0.15m (spouted bed annular space area)
The radial particle velocity of place, embodiment 1 and comparative example 1 is with radial variation relation comparison diagram.
Show that import rotational flow gas can increase the radial velocity of particle, increase in certain degree in Fig. 6, Fig. 7
The whole turbulence intensity of grain, to the transmittance process between reinforcing particle and fluid.
3, in three depth of sections a, b, c, respectively H=0.05m, H=0.10m, H=0.15m (spouted bed annular space area)
The particle of place, embodiment 1 and comparative example 1 intends Temperature Distribution cloud atlas.
Fig. 8, Fig. 9, Figure 10 can see, and under the action of rotational flow gas, central area particle intends temperature and is apparently higher than nothing
Central area particle under rotational flow gas effect intends temperature.Show that import rotational flow gas can play reinforcing in certain degree
The effect transmitted between particle and fluid.
In conclusion the cyclone of the present invention is located at spouted bed entry zone, it ensure that hydrocyclone structure not and influence and is spouted
The spouted effect of entirety of bed, ensure that the spiral air flow of generation can effectively enhance the mixing of gas-particle two-phase, while ensureing eddy flow
Reasonable installation size of the device in spouted bed, can effectively drive the flowing of particle by spiralling air-flow in this way.
It is the tapered spouted bed of three-dimensional column to be particularly suitable for overall structure using the cyclone of the present invention, can effectively be enhanced
Inlet zone and gas in annular space area, particle are sufficiently mixed, and are enhanced the radial motion in spouted area and annular space area particle, are strengthened annular space
Momentum, heat and the mass transfer process of area's particle and injection gas break through the limitation of traditional spouted bed, improve spouted bed
Whole efficiency and production capacity.
Import rotational flow gas can be in efficient hardening spouted bed whole gas-particle two-phase transmittance process, improve the whole of spouted bed
Body efficiency.
Claims (9)
1. a kind of spouted bed, including spouted bed main body (1), which is characterized in that the entrance of the spouted bed main body (1) is installed
There is an import cyclone, the import cyclone includes the nozzle inner tube (21) and nozzle outer tube (22) of coaxial arrangement, in nozzle
Circular passage (3) are formed between pipe and nozzle outer tube, multiple swirl vanes (4) are uniformly installed in circular passage, it is two neighboring
Swirling inlet channel is formed between swirl vane.
2. spouted bed as described in claim 1, which is characterized in that the outer diameter of the nozzle inner tube (21) is denoted as D2, described
The internal diameter of nozzle outer tube (22) is denoted as D1, D2/D1=0.4~0.5, D1The height of=19mm, the nozzle inner tube (21) is
50mm。
3. spouted bed as described in claim 1, which is characterized in that the swirl vane (4) uses width for 6.4mm, thick
The sheet fabrication that degree is 1mm is at the blade of single thread, and the helix angle of the central axis in panel length direction is 45 °, eddy flow
The height of blade (4) is equal with the height of nozzle inner tube (21).
4. spouted bed as claimed in claim 3, which is characterized in that the number of the swirl vane (4) is 8；Described
Angle of inclination of the swirl vane (4) in circular passage (3) can adjust, and the adjustment angle with vertical direction is 30 °.
5. spouted bed as described in claim 1, which is characterized in that the height of the spouted bed main body (1) is denoted as H, spouted bed
The diameter of cylinder (1) is denoted as D3, H=750mm, D3=152mm；Spouted bed main body (1) is the tapered spouted bed of column, spouted bed master
The apex angle of the back taper structure of body entrance is denoted as θ, θ=60 °.
6. a kind of import cyclone, include the nozzle inner tube (21) and nozzle outer tube (22) of coaxial arrangement, nozzle inner tube (21) and
Circular passage (3) are formed between nozzle outer tube (22), multiple swirl vanes (4) are uniformly installed in circular passage (3), it is adjacent
Swirling inlet channel is formed between two swirl vanes (4).
7. import cyclone as claimed in claim 6, which is characterized in that the outer diameter of the nozzle inner tube (21) is denoted as D2, institute
The internal diameter for the nozzle outer tube (22) stated is denoted as D1, D2/D1=0.4~0.5, D1=19mm, the height of the nozzle inner tube (21)
For 50mm.
8. import cyclone as claimed in claim 6, which is characterized in that the swirl vane (4) use width for
6.4mm, at the blade of single thread, the helix angle of the central axis in panel length direction is the sheet fabrication that thickness is 1mm
45 °, the height of swirl vane (4) is equal with the height of nozzle inner tube (21).
9. import cyclone as claimed in claim 6, which is characterized in that the number of the swirl vane (4) is 8；Institute
Angle of inclination of the swirl vane (4) stated in circular passage (3) can adjust, and the adjustment angle with vertical direction is 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200850.4A CN108534537A (en) | 2018-03-12 | 2018-03-12 | A kind of import cyclone and spouted bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200850.4A CN108534537A (en) | 2018-03-12 | 2018-03-12 | A kind of import cyclone and spouted bed |
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| Publication Number | Publication Date |
|---|---|
| CN108534537A true CN108534537A (en) | 2018-09-14 |
Family
ID=63484246
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810200850.4A Pending CN108534537A (en) | 2018-03-12 | 2018-03-12 | A kind of import cyclone and spouted bed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115784557A (en) * | 2023-02-02 | 2023-03-14 | 福建龙净环保股份有限公司 | Belt dryer |
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| CN2101838U (en) * | 1991-08-30 | 1992-04-15 | 中国科学院工程热物理研究所 | Drier with quick circulating fluidised-jet bed |
| US20060186041A1 (en) * | 2001-10-11 | 2006-08-24 | Dempsey Michael J | Fluid bed expansion and fluidisation |
| RU2388964C1 (en) * | 2008-11-07 | 2010-05-10 | Александр Сергеевич Цветко | Method for fuel combustion |
| CN101830627A (en) * | 2010-04-06 | 2010-09-15 | 东南大学 | Sludge vibrating mixing spouted bed drying device and method |
| CN204134608U (en) * | 2014-09-28 | 2015-02-04 | 西北大学 | A kind of air deflector and spouted bed |
| CN208432074U (en) * | 2018-03-12 | 2019-01-25 | 西北大学 | A kind of import cyclone and spouted bed |
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2018
- 2018-03-12 CN CN201810200850.4A patent/CN108534537A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0227550A2 (en) * | 1985-12-18 | 1987-07-01 | Wormser Engineering, Inc. | Apparatus for combusting fuels and method of cumbusting wet fuels |
| CN2101838U (en) * | 1991-08-30 | 1992-04-15 | 中国科学院工程热物理研究所 | Drier with quick circulating fluidised-jet bed |
| US20060186041A1 (en) * | 2001-10-11 | 2006-08-24 | Dempsey Michael J | Fluid bed expansion and fluidisation |
| RU2388964C1 (en) * | 2008-11-07 | 2010-05-10 | Александр Сергеевич Цветко | Method for fuel combustion |
| CN101830627A (en) * | 2010-04-06 | 2010-09-15 | 东南大学 | Sludge vibrating mixing spouted bed drying device and method |
| CN204134608U (en) * | 2014-09-28 | 2015-02-04 | 西北大学 | A kind of air deflector and spouted bed |
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| CN115784557A (en) * | 2023-02-02 | 2023-03-14 | 福建龙净环保股份有限公司 | Belt dryer |
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