CN108553929A - A kind of pneumatic spray drying device atomizer - Google Patents
A kind of pneumatic spray drying device atomizer Download PDFInfo
- Publication number
- CN108553929A CN108553929A CN201810621366.9A CN201810621366A CN108553929A CN 108553929 A CN108553929 A CN 108553929A CN 201810621366 A CN201810621366 A CN 201810621366A CN 108553929 A CN108553929 A CN 108553929A
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- Prior art keywords
- feed liquid
- nozzle
- gas
- spout
- passage
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/20—Sprayers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nozzles (AREA)
Abstract
The invention discloses a kind of pneumatic spray drying device atomizers.Including：The feed liquid passage for being arranged in nozzle-axis center and reducing step by step, multiple gas passages are centrosymmetrically arranged along nozzle-axis and constitute cone structure in feed liquid passage circumferential direction, the cross-sectional area streamwise of the conical surface is gradually reduced, while each gas passage converges in the flowing direction, there is identical torsion angle along the radial direction of the conical surface；Each gas passage end and nozzle ring chamber unicom are simultaneously formed in end annular gas spout, and annular gas spout is around feed liquid spout arrangement and with feed liquid spout top in same plane.Present invention optimizes the atomizers of pneumatic spray drying technology, gas passage and feed liquid passage are separated, the air-flow for flowing through the above-mentioned geometry gas passage of the present invention is transformed into high speed rotation air-flow at gas spout, the pencil feed liquid to be throttled that feed liquid nozzle sprays fully is atomized, can a step stablize and make spherical shape dry powder of the grain size less than 20 microns.
Description
Technical field
The invention belongs to Design of Mechanical Structure technical fields, and in particular to two fluids used in a kind of spray drying device
Atomizer.
Background technology
Monoblock type catalytic converter is commonly used in motor vehicle tail-gas purifying or industrial smoke post-processing.Catalyst activity is loaded
The porous oxide carrier of component or other oxide additions are coated in a manner of similar coating has hundreds of regular 10-
On the metal or honeycomb ceramic carrier in 1000 microns of size ducts, then through subsequent processing, obtain monoblock type catalytic converter.Oxidation
Object grain size is an important indicator for influencing catalyst and being combined the degree of cementing with carrier, is converted to motor vehicle vent gas purification catalysis
Device generally requires the granularity of oxide powder to be less than 20 microns.
Spray drying technology can realize granulation and dry two procedures simultaneously, for manufacturing powder material in many industries
Material.
Nozzle drying equipment includes mainly air heating apparatus, air blower, hot-air distributor, nozzle, drying tower, whirlwind point
From device, several parts such as air-introduced machine.When equipment is run, air blower introduces hot-air by the hot-air distributor at the top of drying tower dry
Dry tower forms rotation shape flowing；Meanwhile the nozzle at the top of drying tower is atomization feed liquid penetrating drying tower, and moisture is made to evaporate rapidly,
Form dried powder；The separation of gas and powder is finally realized in cyclone separator.Wherein clog-free, continuous spray art is
The core of spray drying will realize continuous without hindrance spraying, and key is in nozzle.
Spray drying is often divided into air-flow (or air pressure) formula and centrifugal two ways.Atomizer dry technology is by changing
Become the grain size and size distribution of the rotational speed regulation product of centrifugal pan.With it prepare tail gas cleaner for motor-driven vehicle needed for oxidate powder
Body, the size distribution of powder can just be such that powder granularity is less than at 5-50 microns, by the method for follow-up separation, or grinding bonus point choosing
20 microns.
Vehicle Exhaust Gas Cleaning Catalysts presoma powder has certain viscosity, and pneumatic spray drying technology can be located
The larger feed liquid of viscosity is managed, so pneumatic spray drying mode, which also may be selected, produces satisfaction manufacture motor vehicle vent gas purification catalysis
The powder of device Particle size requirements.
Patent CN202097053U discloses a kind of air-flowing type sprayer that can handle high viscosity liquid or paste fluid, gas
Body spout and feed liquid spout are coaxial, and high pressure feed liquid wraps up compressed gas.Feed liquid flows through the expanding chamber in atomizer, density and viscosity
It reduces, then contacts and be atomized with high pressure gas in nozzle.
Patent CN203874940U, which further points out this nozzle, can handle high solids content feed liquid, and nozzle is not easy to be blocked.
Patent CN1320485A discloses a kind of air assisted spray nozzle component, and feed liquid is flowed along arrangement axis, and gas is along spray
Mouth outer rim flows, and has a feed liquid expanding chamber in nozzle, and the feed liquid into expanding chamber is pre- by the compressed air of part introducing expanding chamber
Atomization, and contacted with the air for flowing through specially designed water conservancy diversion and pressurized construction supercharging from exterior air drain in core flow outlet
It is atomized again.Wider partially flat jet shape can be efficiently generated with relatively low air mass flow and pressure, and enhances liquid
The crushing of body particle.
Patent CN104772244A discloses a kind of twin fluid atomization nozzle, and feed liquid flow to spray nozzle front end along nozzle-axis,
Again from several material-distributing hole inflow gas channels being evenly distributed on nozzle-axis direction, ring of the gas along nozzle outer rim
Shape channel is flowed, and is flowed through in distribution seat after the gas passage that the conical surface is distributed, by the way that band is fanned on airflow direction in nozzle
The thin layer gas distributor of leaf becomes to be vortexed, then contacts mixed aerosol with the feed liquid flowed out from material-distributing hole, and mixture can from one
Adjusting block to adjust feed liquid spray angle sprays into drying tower.
Patent CN2341721Y discloses a kind of pneumatic type atomizer, which can carry out feed liquid double atomization, spray
Be specifically designed a minor air cell in the mouth, along atomizer axle center flowing feed liquid in minor air cell by a part from exterior air drain along whirlpool
Air admission hole of being biased in flow chamber injects the compressed gas vortex primary atomization that minor air cell is formed, and the drop being atomized for the first time is in nozzle
Outlet is by exterior air drain surplus air secondary-atomizing.
Patent CN1320485A, CN2341721Y and CN104772244A are air-blast atomization nozzles, feed liquid passage with
The center line of nozzle assembly is coaxial, and gas passage is uniformly and symmetrically distributed in nozzle assembly outer rim.Three kinds of nozzles all contain two-stage
Atomization process, first order atomization are happened at nozzle interior.
Atomization in patent CN234172Y and CN104772244A nozzle is realized by generating vortex.The former vortex is
It is generated from outer rim gas passage along the deviation air inlet port entered between nozzle interior minor air cell in nozzle, centre may have gas
Distribution and gas and feed pressure matching problem between double atomization；The vortex of the latter passes through in nozzle exterior gas channel
Middle to be added what smaller than channel size sheet gas distributor with flabellum was realized, which does not occupy entirely
Gas passage.
Or nozzle arrangements disclosed in aforementioned patent are too simple or excessively complicated, and with the spray for having similar structures
Production motor-driven vehicle is not achieved with the Granularity Distribution that spray drying process produces in mouth or the atomizer being commercialized on the market
The requirement of gas catalyst for purifying powder body material.
Invention content
To solve the above-mentioned problems, we devise a kind of air-blast atomization nozzle by improving nozzle interior air-flow mode,
In conjunction with improved application method, producing 20 microns in air-blast atomization drying equipment previous step, below to meet manufacture motor-driven
The oxide powder material of tail gas catalyst for purifying.
The invention is realized by the following technical scheme：
Pneumatic spray drying device atomizer, including feed liquid passage and its feed liquid spout of end, gas passage and
Gas spout, it is characterised in that：
The feed liquid passage is arranged in nozzle-axis center, and feed liquid passage cross-sectional area streamwise reduces step by step；On
The spouting velocity of feed liquid can be increased by stating structure, promote the dispersion of feed liquid.
The gas passage has multiple, and multiple gas passages are centrosymmetrically arranged along nozzle-axis in feed liquid passage circumferential direction
Cone structure is constituted, the cross-sectional area streamwise of the conical surface is gradually reduced, and each gas passage converges same in the flowing direction
When, there is identical torsion angle along the radial direction of the conical surface；Each gas passage end and nozzle ring chamber unicom；Above-mentioned unique structure is set
Meter, can effectively ensure that a variety of flow velocitys, diversified forms air-flows become the swirling eddy of convergence type, makes to be formed high-speed rotating
Air-flow is conducive to feed liquid and is dispersed into smaller feed liquid particle, by powder body material in spout and feed liquid more fully contact-impact
Granularity is controlled at 20 microns or less.
The nozzle ring chamber cross-sectional area streamwise is gradually reduced and forms annular gas spout, annular in end
For gas spout around feed liquid spout arrangement, annular gas spout and feed liquid spout, center line is coaxial, top in same plane, this
It is designed with and forms uniform spherical feed liquid particle conducive to feed liquid.
The nozzle ring cavity wall is being axially arcuate structure, forms cross-sectional area streamwise camber and gradually subtracts
Small arc tapered roller ring.
The gas passage is 4 to 8.
While each gas passage converges in the flowing direction, along the radial direction of the conical surface have identical torsion angle be 5 to
45 degree.
Nozzle of the present invention is mounted on spray drying device drying tower top, side, bottom or drying tower centre position.
Nozzle described further is mounted on the axial location of drying tower cylinder bottom.
In use, feed liquid is flowed along the feed liquid passage among nozzle, the gas flow that gas is arranged in the circumferential
It moves and converges again in nozzle chambers, gas and feed liquid contact in respective nozzle and enter drying tower.
Present invention optimizes the atomizers of pneumatic spray drying technology, use pneumatic spray drying skill of the present invention
The atomizer of art handles feed liquid, and gas passage and feed liquid passage are separated, and it is logical to flow through the above-mentioned geometry gas of the present invention
The air-flow in road is transformed into the high speed rotation air-flow at gas spout, and the pencil feed liquid to be throttled that feed liquid nozzle sprays is filled
Point atomization, can a step stablize and make spherical shape dry powder of the grain size less than 20 microns.Nozzle of the present invention in spray drying for setting
In standby, especially suitable for manufacturing the oxide powder material of motor vehicle vent gas purification catalysis device, it can also be used to pharmacy, coating,
Food and other chemical industries.
Description of the drawings
Fig. 1 is nozzle body structure chart of the present invention；
Fig. 2 is nozzle partial enlarged view of the present invention；
Fig. 3 is cap of spraying nozzle structure chart of the present invention；
Fig. 4 is Fig. 1 distribution seat AA cross-sectional views；
Fig. 5 is Fig. 1 distribution seat BB cross-sectional views.
Component names in figure：1 is nozzle base, and 2 be distribution seat, and 3 be nozzle head, and 4 be nut, and 5 be cap of spraying nozzle, and 6 are
Nozzle chambers, 7 be gas spout, and 8 be feed liquid spout, and 9a is screw thread one, and 9b is screw thread two, and G is gas passage, and L is feed liquid passage,
θ is torsion angle.
Specific implementation mode
The present invention is further described With reference to embodiment, specific implementation mode be to the principle of the invention into
One step illustrates, does not limit the invention in any way, and is protected without departing from the present invention with the same or like technology of the present invention
Range.
In conjunction with attached drawing.
Pneumatic spray drying device atomizer, including feed liquid passage L and its feed liquid spout 8 of end, gas passage G
With gas spout 7；Feed liquid passage L is arranged in nozzle-axis center, and feed liquid passage L cross-sectional area streamwises reduce step by step.
Gas passage G has multiple, and multiple gas passage G are centrosymmetrically arranged along nozzle-axis in feed liquid passage L circumferential directions
Cone structure is constituted, the cross-sectional area streamwise of the conical surface is gradually reduced, and each gas passage G converges same in the flowing direction
When, there is identical torsion angle along the radial direction of the conical surface；The ends each gas passage G and 6 unicom of nozzle ring chamber；
6 cross-sectional area streamwise of nozzle ring chamber is gradually reduced and forms annular gas spout 7, annular gas in end
Body spout 7 arranges that annular gas spout 7 is with 8 top of feed liquid spout in same plane around feed liquid spout 8.
6 inner wall of nozzle ring chamber of the present invention it is axial be arcuate structure, formed cross-sectional area streamwise camber by
Decrescence small arc tapered roller ring.
Gas passage G of the present invention uses 4 to 8.While each gas passage G is converged in the flowing direction, along the conical surface
It is 5 to 45 degree that radial direction, which has identical torsion angle,.
Nozzle of the present invention is mounted on spray drying device drying tower top, side, bottom or drying tower centre position.Nozzle
Axis of the best position in drying tower cylinder bottom.
Below specifically to process structure explanation, specific structure of processing passes through 5 two parts of nozzle body and cap of spraying nozzle in this example
It realizes.
The structure of nozzle such as Fig. 1 shown in 2,3,4 and 5, is made of nozzle body and 5 two parts of cap of spraying nozzle.Nozzle body packet
Nozzle base 1 is included, seat 2, nozzle head 3 are distributed.Nozzle base 1 is fixed on feed pipe tail portion by one 9a of screw thread, and cap of spraying nozzle 5 is logical
It crosses nut 4 and two 9b of screw thread is fixed on 2 rear end of distribution seat.Feed liquid passage L is on the axis of nozzle body, and size is in distribution seat
Portion starts zooming out, and continues the size that feed liquid spout 8 is narrowed down to along the conical surface in feed liquid nozzle.The outer wall of nozzle base 1 with
Space between charging inside pipe wall is the annular gas passage of nozzle body front end.Have in distribution seat 2 several along fluid flow direction
Equally distributed isometrical cylindrical gas passage, along fluid flow direction, the axial line distance of each gas passage and nozzle body by
It is decrescence small.In addition, there are one radial angles between the axis and nozzle body axis of each gas passage, such as Fig. 4 and Fig. 5 institutes
Show.5 inner wall of cap of spraying nozzle, nozzle body top space constitute eddy current spraying nozzle chamber 6, the 8 periphery shape of feed liquid spout on 5 top of cap of spraying nozzle
The circlewise gas spout 7 of slot structure.Gas spout 7 is concordant with the outlet edge of feed liquid spout 8.
Feed liquid is flowed along feed liquid passage L, in nozzle body through compressing step by step, is sprayed into drying tower body from feed liquid spout 8.Gas
Body flows to 2 front end of distribution seat, the gas passage G in the allocated seat 2 by feed pipe, along the circular passage of 1 part of nozzle base
Into nozzle chambers 6.Between the multiple gas passage G and gas passage G and feed liquid passage L that collect along conical surface distribution in distribution seat 2
The presence of radial angle not only can import nozzle chambers 6 when flowing a gas over the gas passage L in distribution seat along the axial of nozzle,
Also swirling eddy can be formed in nozzle chambers 6 along the radial motion of nozzle.The total sectional area of gas passage G is less than in distribution seat 2
The circular passage sectional area of 1 part of nozzle base, the sectional area of gas spout 7 are much smaller than the section of gas passage in distributor chamber again
Product is formed in nozzle chambers 6 by the vortex of primary speedup, the vortex is in smaller so gas is partially compressed in distributor chamber
After the gas spout 7 of bore is sufficiently compressed, the form of air-flow sprays gas spout 7 rotate at high speed.This high speed injection
Gas swirl can come into full contact with, crush and be atomized the feed liquid come out from feed liquid spout 8.
Nozzle of the present invention is mounted on drying tower column axis bottom position, and the spout direction of nozzle is vertically upward, makes material
Liquid flow direction and the hot-air flowed from drying tower top down flow in opposite directions, this not only contributes to increase the mixing being atomized
The contact area of object and hot-air can also increase residence time of the material in drying tower, and object and heat sky are atomized to increase
Thermal energy exchange efficiency between gas.
In use, high speed eddy airstream surrounds feed liquid spout 8 when the throttling of gas spout 7 sprays, spout goes out nozzle of the present invention
Pressure at mouthful is smaller, introduces additional pressure difference on the basis of the static pressure difference between feed liquid port liquid level and feed liquid spout, this has
Conducive to the flowing of feed liquid.It is reduced when position of the feed liquid spout 8 on drying tower, can further be conducive to the flowing of feed liquid.
Experiment proves that nozzle is set to drying tower cylinder bottom axis position by the present invention, even if feed liquid port liquid level position is less than spray
Mouth position does not have to apply extra pressure to feed liquid, or feed liquid location of tank is not required to be higher than nozzle exit area, and feed liquid can be by air-flow
Formula spray drying device atomization drying is at 20 microns of powders below.
As shown in Figure 1, Figure 2, Figure 3 shows, Fig. 1 is nozzle body structure chart, and Fig. 2 is nozzle partial enlarged view, and Fig. 3 is cap of spraying nozzle
Structure chart；The tops Fig. 1 are divided into cross-sectional view, and lower part is shape assumption diagram, and lower part does not draw 5 shape of cap of spraying nozzle, and the tops Fig. 3 are divided into
Cross-sectional view, lower part are shape assumption diagram, and lower part includes 5 shape of cap of spraying nozzle.This legend uses screw connection structure by nozzle
Pedestal 1, distribution seat 2 and nozzle head 3 connect, gas passage G of the present invention, feed liquid passage L, nozzle chambers 6, gas spout 7, feed liquid
The structure settings such as spout 8 are wherein.Nozzle chambers 6 connect cap of spraying nozzle 5 by nut 4 and are formed with distribution seat 2.Gas passage G, feed liquid passage
L is set in nozzle base 1 and distribution seat 2, and in nozzle front top surface, same plane forms annular gas spout 7 and feed liquid spout
8。
As shown in Figure 4, Figure 5, Fig. 4 is distribution seat AA cross-sectional views, and Fig. 5 is distribution seat BB cross-sectional views.This
In legend, feed liquid passage L is located at axis center, and the feed liquid passage L diameters of streamwise distribution 2 axis center of seat are progressive to become smaller, Fig. 4
Middle feed liquid passage L diameters are more than feed liquid passage L diameters in Fig. 5；6 groups of gas passage G settings, streamwise, 6 gas passages
G forms cone structure, arranges that circumference is more than in Fig. 5 in Fig. 4 and arranges circumference, and has reversed torsion angle.
Claims (6)
1. a kind of pneumatic spray drying device atomizer, including feed liquid passage and its feed liquid spout, the gas passage of end
And gas spout, it is characterised in that：
The feed liquid passage is arranged in nozzle-axis center, and feed liquid passage cross-sectional area streamwise reduces step by step；
The gas passage has multiple, and multiple gas passages are centrosymmetrically arranged along nozzle-axis and are constituted in feed liquid passage circumferential direction
The cross-sectional area streamwise of cone structure, the conical surface is gradually reduced, while each gas passage converges in the flowing direction, edge
The radial direction of the conical surface has identical torsion angle；Each gas passage end and nozzle ring chamber unicom；
The nozzle ring chamber cross-sectional area streamwise is gradually reduced and forms annular gas spout, annular gas in end
Spout is around feed liquid spout arrangement, and annular gas spout is with feed liquid spout top in same plane.
2. pneumatic spray drying device atomizer according to claim 1, it is characterised in that：The nozzle ring chamber
Inner wall is being axially arcuate structure, forms the arc tapered roller ring that cross-sectional area streamwise camber is gradually reduced.
3. pneumatic spray drying device atomizer according to claim 2, it is characterised in that：The gas passage is
4 to 8.
4. pneumatic spray drying device atomizer according to claim 2, it is characterised in that：Each gas passage
While convergence in the flowing direction, it is 5 to 45 degree to have identical torsion angle along the radial direction of the conical surface.
5. pneumatic spray drying device atomizer according to claim 2, it is characterised in that：The nozzle is mounted on
Spray drying device drying tower top, side, bottom or drying tower centre position.
6. pneumatic spray drying device atomizer according to claim 5, it is characterised in that：, the nozzle installation
Axial location in drying tower cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810621366.9A CN108553929B (en) | 2018-06-15 | 2018-06-15 | Atomizing nozzle for airflow type spray dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810621366.9A CN108553929B (en) | 2018-06-15 | 2018-06-15 | Atomizing nozzle for airflow type spray dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108553929A true CN108553929A (en) | 2018-09-21 |
| CN108553929B CN108553929B (en) | 2023-10-03 |
Family
ID=63554072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810621366.9A Active CN108553929B (en) | 2018-06-15 | 2018-06-15 | Atomizing nozzle for airflow type spray dryer |
Country Status (1)
| Country | Link |
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| CN (1) | CN108553929B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596363A (en) * | 2019-09-29 | 2019-12-20 | 上海化工研究院有限公司 | Forced dispersion type aerial fog quantitative release device and use method thereof |
| CN114871005A (en) * | 2022-06-02 | 2022-08-09 | 重庆大学 | Icing wind tunnel nozzle based on different distribution forms for feedback adjustment |
| CN115870117A (en) * | 2023-02-07 | 2023-03-31 | 山东浩纳新材料科技集团有限公司 | Novel spray nozzle |
| CN116271890A (en) * | 2023-05-19 | 2023-06-23 | 宁德时代新能源科技股份有限公司 | Sprayer, spray drying device, spray drying system and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596363A (en) * | 2019-09-29 | 2019-12-20 | 上海化工研究院有限公司 | Forced dispersion type aerial fog quantitative release device and use method thereof |
| CN114871005A (en) * | 2022-06-02 | 2022-08-09 | 重庆大学 | Icing wind tunnel nozzle based on different distribution forms for feedback adjustment |
| CN114871005B (en) * | 2022-06-02 | 2023-01-17 | 重庆大学 | Icing wind tunnel nozzle based on different distribution forms for feedback adjustment |
| CN115870117A (en) * | 2023-02-07 | 2023-03-31 | 山东浩纳新材料科技集团有限公司 | Novel spray nozzle |
| CN116271890A (en) * | 2023-05-19 | 2023-06-23 | 宁德时代新能源科技股份有限公司 | Sprayer, spray drying device, spray drying system and control method thereof |
| CN116271890B (en) * | 2023-05-19 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Sprayer, spray drying device, spray drying system and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN108553929B (en) | 2023-10-03 |
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