CN106607197A - Centrifugal atomizing nozzle and spray dryer - Google Patents
Centrifugal atomizing nozzle and spray dryer Download PDFInfo
- Publication number
- CN106607197A CN106607197A CN201510691501.3A CN201510691501A CN106607197A CN 106607197 A CN106607197 A CN 106607197A CN 201510691501 A CN201510691501 A CN 201510691501A CN 106607197 A CN106607197 A CN 106607197A
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- China
- Prior art keywords
- wind
- protection
- protection wind
- centrifugal
- spray
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
-
- 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
Abstract
The invention relates to the field of spray dryers and discloses a centrifugal atomizing nozzle and a spray dryer comprising the same. The centrifugal atomizing nozzle comprises a centrifugal atomizer and a protection wind guide pipe, wherein the centrifugal atomizer is internally provided with an atomizing disc which is used for spraying materials into fog drips and provided with atomizing holes, and a material guide pipe connected with the atomizing disc and a material inlet; and the protection wind guide pipe is provided with a protection wind inlet and a protection wind spraying opening. The protection wind guide pipe is arranged around the centrifugal atomizer, so that protection wind sprayed by the protection wind spraying opening surrounds the fog-drip-shaped materials sprayed by the atomizing holes. When spray drying is conducted by adopting the dryer comprising the centrifugal atomizing nozzle, the problems that microspheres are burst, abnormal shapes and fine powder are produced in the drying process can be solved, and the sphericity of obtained dried particles can be improved.
Description
Technical field
The present invention relates to spray dryer field, in particular it relates to a kind of centrifugal spraying nozzle and one
Plant spray dryer.
Background technology
Spray dryer be it is a kind of can and meanwhile complete be dried and pelletize device.Can be with by technological requirement
Pressure, flow, the size of spray orifice of feed pump are adjusted, the required ball for being sized ratio is obtained
Shape granule.At present, spray dryer is obtained extensively in fields such as chemical industry, pharmacy, food, water process
Using.
Spray dryer generally includes spray drying tower, hot air supply device, and (hot air supply device includes setting
Be placed in the hot-air distributor for being spray-dried top of tower), air exhausting device and liquid material atomising device (arrange
In spray drying tower).Its process characteristic is that gas phase media Jing is filtered and heated, via hot-air distributor
After distribution, into spray drying tower.Liquid material Jing liquid material atomising devices spray into trickle mist
Shape drop, contacts with hot blast cocurrent or countercurrent, and it is powder body finished product to be dried within the extremely short time.Finished product
Continuously by tower bottom output is dried, row is collected by cloth bag catcher or washed to the waste gas material containing micronic dust
It is empty.It is atomized into after droplet yet with liquid material and directly contacts with high-temperature hot-air, top layer material can be fast
Drying and form shell in speed, internal as temperature is constantly raised, moisture subsequent evaporation process therein there is
Pressure is formed, the microsphere for causing appearance molding is susceptible to explosion, produce special-shaped and a large amount of fine powders, because
There are the following problems for this above-mentioned spray dryer：The atomizing particle size distribution width of atomizer, generation
Fine powder amount is larger；Easily there is abnormity in the granule of molding, and sphericity is not high；To ensure drying effect, go out
Mouth EGT is higher, carries a large amount of waste heats and fails to make full use of.
Explanation of the prior art to spray dryer is more, and such as CN203565225U provides one kind
Atomizer, is gradually become by arranging cross-sectional area the bottom surface of nozzle body (surrounding bottom discharge mouth)
Big guidance cavity, so as to improve the sphericity of catalyst granules.CN102728490A provides a kind of mist
Change nozzle, fluid flow velocity when spray-hole is fast and wearability is good, can be with reduces cost, raising work
Efficiency.However, although said method can to a certain extent optimize spray shaping result, due to
The slurry of atomization is still directly contacted with high-temperature medium, thus fails to solve microsphere explosion in dry run,
Produce the problem of special-shaped and fine powder.
CN101979940A provides a kind of reverse-flow spray drying tower, and structure design makes serosity in tower
Contact with low temperature hot blast first, middle temperature, high-temperature hot-air are experienced successively, the design can make full use of remaining
Heat, reducing energy consumption, the discharge of reduction fine powder simultaneously mitigate to a certain extent microsphere explosion in dry run,
The problem of special-shaped and fine powder is produced, but the method industrially implements more difficult.
The content of the invention
The purpose of the present invention is the defect for overcoming prior art, there is provided one kind can industrially easily
The centrifugal spraying nozzle for being used, is sprayed using the drying machine containing the centrifugal spraying nozzle
Microsphere explosion in dry run is can solve the problem that when being dried, the problem of special-shaped and fine powder is produced, and can
Improve the sphericity of the dry particle for obtaining.
To achieve these goals, in a first aspect, the present invention provides a kind of centrifugal spraying nozzle, should
Nozzle includes：
Centrifugal type atomizer, is provided with for being carrying for droplet by material injection in the centrifugal type atomizer
The atomizing disk of orifice, and it is provided with the material conduit of the connection atomizing disk and material inlet；And
Protection wind guiding tube, the protection wind guiding tube is provided with protection wind entrance and protection wind jet；
The protection wind guiding tube is arranged around the centrifugal type atomizer so that by the protection wind spray
The protection bellows chamber that loophole sprays encloses the droplet shape material ejected by the orifice.
Second aspect, the present invention provides a kind of spray dryer, and the spray dryer includes being spray-dried
Tower, the spray dryer also includes that according to aforesaid centrifugal spraying nozzle of the invention the nozzle sets
It is placed in the tower body top of the spray drying tower.
The centrifugal spraying nozzle of the present invention on its nozzle due to being provided with for being by liquid material injection
The material inlet and material that the atomizing disk with orifice of droplet is connected with the material jet is led
Pipe, protection wind jet and the protection wind entrance connected with the protection wind jet, so as in spraying
During drying machine pelletize, the droplet shape material ejected by material jet is enclosed in by protecting
In the protection wind that wind jet sprays (wind is protected by the high temperature drying in droplet shape material and spray dryer
Wind is isolated), and then avoid droplet shape material and high temperature drying wind directly contact, therefore droplet shape material
Warming-up section with a mitigation, so as to substantially reduce due to being drastically dried the several of generation breakage of particles
Rate.And droplet shape material can fully develop molding in the mitigation temperature-rise period, it is to avoid droplet
Shape material tears in the early stage the too fast evaporation in atomization process, so as to reduce the formation of special-shaped granule, carries
The sphericity of high granule.
Other features and advantages of the present invention will give specifically in subsequent specific embodiment part
It is bright.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description,
It is used to explain the present invention together with detailed description below, but does not constitute the limit to the present invention
System.In the accompanying drawings：
Fig. 1 is the structural representation of centrifugal spraying nozzle of the invention.
Fig. 2 is the structural representation of spray dryer of the invention.
Description of reference numerals
1st, centrifugal type atomizer 2, orifice
3rd, atomizing disk 4, material inlet
5th, material conduit 6, protection wind guiding tube
7th, wind entrance 8, protection wind jet are protected
9th, material outlet 10, a tail wind outlet
11st, separator 12, separation wind outlet
13rd, mouth is arranged outside blower fan 14, separation wind
15th, dry wind allotter
Specific embodiment
The specific embodiment of the present invention is described in detail below.It should be appreciated that this place
The specific embodiment of description is merely to illustrate and explains the present invention, is not limited to the present invention.
In a first aspect, the invention provides a kind of centrifugal spraying nozzle, the nozzle includes：
Centrifugal type atomizer, is provided with for being carrying for droplet by material injection in the centrifugal type atomizer
The atomizing disk of orifice, and it is provided with the material conduit of the connection atomizing disk and material inlet；And
Protection wind guiding tube, the protection wind guiding tube is provided with protection wind entrance and protection wind jet；
The protection wind guiding tube is arranged around the centrifugal type atomizer so that by the protection wind spray
The protection bellows chamber that loophole sprays encloses the droplet shape material ejected by the orifice.
In the present invention, to the species of the material, there is no particular limitation, centrifugation of the present invention
Formula atomizer can be used in drying in need material, for example, material of the present invention includes
Any one or more in liquid slurry, gas-liquid mixed slurry and gas-solid-liquid mixed slurry.
Also centrifugal motion is carried out in centrifugal spraying nozzle of the present invention containing the guiding atomizing disk
The equipment such as motor, connecting rod, these are all known to those skilled in the art, and here of the present invention is no longer
List one by one.
In the present invention, the protection wind is by the spray drying tower of droplet shape material and spray dryer
High-temperature hot-air (namely high temperature drying wind) isolation, so as to avoid droplet shape material and high temperature drying wind
Directly contact, hence in so that droplet shape material have one mitigation warming-up section, so as to substantially reduce by
In the probability for being drastically dried generation breakage of particles.And droplet shape material energy in the mitigation temperature-rise period
Enough fully development molding, it is to avoid droplet shape material tears in the early stage the too fast evaporation in atomization process,
So as to reduce the formation of special-shaped granule, the sphericity of granule is improved.
In the present invention, those skilled in the art can adopt after the technical scheme for having understood the application
With conventional various means in the art by the protection wind beyond the nozzle via protection wind entrance
In being introduced into the protection wind guiding tube of the nozzle.The present invention does not have to the number of the protection wind entrance yet
It is special to limit, as long as so that enough uniform from the protection wind energy for protecting wind jet to eject
Ground surrounds the droplet shape material ejected by the orifice.
In the present invention, to the material to be dried at the material inlet flow is without special
Restriction.Those skilled in the art can determine the material to be dried in institute according to actual needs
State the flow at material inlet.
In the present invention, it is preferred to the droplet shape material shape mist formation ejected by the orifice is bored, more
It is preferred that controlling the rotating speed of the atomizing disk so that the cone angle of the mist cone for being formed is 60-150 degree.
In the present invention, it is preferred to the protection wind jet is the annular spray around atomizing disk arrangement
Loophole.That is, jet of the protection wind jet of the present invention for annular.
Preferably, the external diameter of the protection wind jet of annular is with the diameter ratio of the atomizing disk
More than 1：1 to less than or equal to 50：1.The computational methods of the external diameter are to disregard to form the protection wind spray
The thickness of the material of loophole.
In the present invention, it is preferred to the cross section of the protection wind jet is located parallel to the atomizing disk
Plane.
In the present invention, to the protection wind guiding tube that is arranged on the centrifugal type atomizer with should
There is no particular limitation for the connected mode of centrifugal type atomizer, and those skilled in the art can adopt ability
Conventional various methods are attached in domain.Under preferable case, in order to utilize prior art as much as possible
In spray-drying installation, the preferably described protection wind guiding tube of the present invention and the centrifugal type atomizer
Connected mode includes being welded to connect, be threadedly coupled or connecting by arranging fixed plate.
In the case of more preferably, in the present invention, in order to utilize spraying of the prior art as much as possible
Drying device, and existing spray-drying installation transformed as few as possible, the present invention is preferably
By arranging fixed plate at the top of the centrifugal type atomizer, then institute is caused by the fixed plate
State protection wind guiding tube to arrange around the centrifugal type atomizer.
It will be appreciated to those of skill in the art that in the present invention, outside the protection wind guiding tube
Footpath is bigger than the radius of the nozzle body on same plane.Sprayed according to centrifugal spraying of the present invention
Mouth, the external diameter of particularly preferably described protection wind guiding tube is than the centrifugal type atomizer on same plane
The big 2-30mm of radius.In the present invention, the computational methods of the external diameter and the radius are disregarded
Form centrifugal type atomizer or form the thickness of the material of protection wind guiding tube.
In the present invention, the number of the protection wind entrance can be at least one, as long as enabling to
The protection wind of the protection wind guiding tube is entered by protecting wind jet by the protection wind entrance
The droplet shape material (forming mist cone) ejected by the orifice can be equably surrounded during ejection i.e.
Can.In order that the protection wind energy ejected from the protection wind jet is enough more uniformly wrapped
Enclose aforesaid mist cone, the number of particularly preferably described protection wind entrance is two or more, and two
The individual or plural protection wind distribution mouth is symmetric.
In the present invention, to it is described protection wind entrance shape there is no particular limitation, for example can be
It is square, circular or unsetting etc., as long as the protection wind energy of the present invention is enough via the protection wind entrance
Into protection wind guiding tube, and can equably surround aforesaid after being sprayed by the protection wind jet
Mist is bored.
In the present invention, it is preferred to the protection wind is introduced along the tangential direction of the protection wind entrance,
So that enough the surrounding in the protection wind guiding tube of the protection wind energy is advanced.
In the present invention, it is preferred to the protection wind causes the guarantor in the flow of the protection wind jet
Shield wind energy enough equably surrounds aforesaid mist cone, more preferably in the case of, the protection wind is in the guarantor
Flow at shield wind jet is 0.1-10m3/min。
The first preferred embodiment of the invention, centrifugal spraying of the present invention
As shown in figure 1, wherein, the nozzle specifically includes the structural representation of nozzle：
Centrifugal type atomizer 1, is provided with for being droplet by material injection in the centrifugal type atomizer 1
Atomizing disk 3 with orifice 2, and it is provided with the thing of the connection atomizing disk 3 and material inlet 4
Material conduit 5；And protection wind guiding tube 6, the protection wind guiding tube 6 is provided with protects the He of wind entrance 7
Protection wind jet 8；
The protection wind guiding tube 6 is arranged around the centrifugal type atomizer 1 so that by the protection wind
The protection bellows chamber that jet 8 sprays encloses the droplet shape material ejected by the orifice 2.
Second preferred embodiment of the invention, adopts with structure as shown in Figure 1
Centrifugal spraying nozzle sprays material to be dried into the spray drying tower of spray dryer, specifically
For：
Material to be dried is introduced into the centrifugal spraying spray from the material inlet 4 of centrifugal type atomizer 1
Mouth, and be introduced into by material conduit 5 in the atomizing disk 3 that can carry out centrifugal motion, it is described to treat
Dry material sprays the material of droplet shape by the orifice on the atomizing disk 3 into spray drying tower
And formed mist cone；And, will protection wind from the protection wind entrance 7 of protection wind guiding tube 6 introduce it is described from
In core type atomizer, wherein, the protection wind guiding tube 6 sets around the centrifugal type atomizer 1
Put, and the protection wind jet 8 that the protection wind is arranged from the protection wind guiding tube 6 sprays,
And the protection bellows chamber for spraying encloses the droplet shape material ejected by the orifice 2 so that the droplet
The high-temperature hot-air being full of in shape material and spray drying tower is relatively isolated.
Second aspect, the invention provides a kind of spray dryer, the spray dryer includes spray dried
Dry tower, the spray dryer is also included according to aforesaid centrifugal spraying nozzle of the invention, the nozzle
It is arranged at the tower body top of the spray drying tower.
Under preferable case, in the present invention, the tower body of the spray drying tower includes cylindrical part and connection
Tapered portion below the cylindrical part, is provided with dry wind allotter at the top of the cylindrical part, described
The bottom of tapered portion is provided with material outlet, and the cylindrical part is arranged with the connecting portion of the tapered portion
There is a tail wind to export.
In the present invention, the dry wind allotter is used to introduce high warm into the spray drying tower
Material of the wind to be dried in the spray dryer.Specifically, the high-temperature hot-air can be Jing
The high-temperature hot-air crossed after heating stove heat.
In the present invention, the centrifugal spraying nozzle is arranged on the tower body top of the spray drying tower
Portion, is full of high-temperature hot-air in the spray drying tower, enter in the tower body from the orifice and formed
Mist cone by it is described protection bellows chamber enclose, be relatively isolated with the high-temperature hot-air in tower, in moving along droplet
Direction forms thermograde from low to high, and moist gradient from high to low.Droplet and protection wind
Contact can relax intensification and fully develop molding, then contact with high-temperature hot-air again and continue drying.
Bottom of towe is fallen directly into the larger product of granule, and product fine powder leads to a tail wind of spray drying tower
Outside spray drying tower.Also, the product fine powder preferably carries out separating with a tail wind of spray drying tower
To a tail wind for removing product fine powder.
Preferably, air can be by filter and heater, into the dry wind at the top of spray dryer
Allotter, hot-air is in the shape of a spiral even in spray drying tower.Material is through filter by being pumped to
In of the invention aforesaid centrifugal type atomizer below dry wind allotter, material is set to be sprayed into minimum mist
Drop-wise, the droplet shape material and hot-air current contacting in the tower body of the spray drying tower, moisture content is fast
Speed evaporation, it is powder finished product to be dried in very short time.
In the present invention, the spray dryer is also separated including entrance with a tail wind outlet
Device, the separation wind outlet of the separator is connected with the protection wind entrance, with to the protection wind injection
Mouth provides protection wind.In the present invention, the material to be dried is into the spray drying tower
It is oarse-grained bottom of towe is fallen directly into by dry material to go out device when in tower body, and short grained fine powder
Shape material then draws the spray drying tower with a tail wind in the spray drying tower from a tail wind outlet
Tower body, also, a tail wind containing the tiny powdered material separated by the separator, is obtained
To a tail wind utilization to be recycled of removing fine powder.
In the present invention, the wind that separates exports the pipe that blower fan is provided by with the protection wind entrance
Road is connected, and the pipeline between the blower fan and the protection wind entrance is additionally provided with to separate and arrange outside wind mouth.
In the present invention, it is preferred to temperature of the temperature of the protection wind less than the high-temperature hot-air, more
It is preferred that at puff prot of the protection wind at the protection wind jet with the dry wind allotter
High-temperature hot-air temperature difference be 50-500 DEG C.
The third preferred embodiment of the invention, spray dryer of the present invention
Structural representation as shown in Fig. 2 wherein, the spray dryer specifically include spray drying tower and this
Aforesaid centrifugal spraying nozzle is invented, the centrifugal spraying nozzle is arranged at the spray drying tower
Tower body top.The spray drying tower includes cylindrical part and the taper being connected to below the cylindrical part
Portion, is provided with dry wind allotter 15 at the top of the cylindrical part, the bottom of the tapered portion is provided with
Material outlet 9, the cylindrical part is provided with a tail wind outlet 10 with the connecting portion of the tapered portion.It is described
Spray dryer also includes the separator 11 that entrance is connected with a tail wind outlet 10, the separator 11
Separation wind outlet 12 connect with the protection wind entrance, with to the protection wind jet offer protection
Wind.It is described to separate wind outlet 12 and the pipeline communication for protecting wind entrance to be provided by blower fan 13,
Pipeline between the blower fan 13 and the protection wind entrance is additionally provided with and separates row's mouth 14 outside wind.
4th kind of preferred embodiment of the invention, illustrates using containing of the present invention
Centrifugal spraying nozzle spray dryer technological process, the technological process is in such as Fig. 1 and Fig. 2 institutes
Implement in the structure shown, in particular：
Material to be dried is introduced into the centrifugal spraying spray from the material inlet 4 of centrifugal type atomizer 1
Mouth, and be introduced into by material conduit 5 in the atomizing disk 3 that can carry out centrifugal motion, it is described to treat
Dry material sprays the material of droplet shape by the orifice on the atomizing disk 3 into spray drying tower
And formed mist cone；And, will protection wind from the protection wind entrance 7 of protection wind guiding tube 6 introduce it is described from
In core type atomizer, wherein, the protection wind guiding tube 6 sets around the centrifugal type atomizer 1
Put, and the protection wind jet 8 that the protection wind is arranged from the protection wind guiding tube 6 sprays,
And the protection bellows chamber for spraying encloses the droplet shape material ejected by the orifice 2 so that the droplet
The high-temperature hot-air being full of in shape material and spray drying tower is relatively isolated, wherein, the high-temperature hot-air by
Positioned at be spray-dried top of tower dry wind allotter 15 introduce into the tower body of the spray drying tower with
The drying material to be dried.The larger product of the granule that is dried to obtain falls directly into bottom of towe, from institute
State material outlet 9 to discharge.And product fine powder exports 10 with a tail wind in spray drying tower from a tail wind
Tower body is drawn to separator 11.The low temperature a tail wind for separating wind outlet 12 of the separator 11 is introduced to
In blower fan 13, the low temperature a tail wind part from the blower fan 13 is discharged by separating row's mouth 14 outside wind
Spray dryer, another part to protect wind in the form of enter the centrifugal spraying nozzle in.
The present invention is it should be strongly noted that to above-mentioned material conduit, atomizing disk, material inlet, mist
Change hole, protection wind entrance, protection wind guiding tube, the concrete size of protection wind jet without special
Limit, those skilled in the art can be using in the art after technical scheme has been understood
Conventional wisdom and determine above-mentioned each size according to actual needs.
The present invention includes protecting wind entrance and protection wind jet by installing in the periphery of centrifugal atomizer
In interior protection wind guiding tube, one protection wind is introduced in spray drying tower to spray orifice
Mist cone is relatively isolated with the high-temperature hot-air in spray drying tower, it is to avoid droplet directly connects with high-temperature hot-air
Touch, droplet has the warming-up section of a mitigation, therefore greatly reduces because drastically dry generation granule breaks
The probability for splitting.And drop can fully develop molding in the mitigation temperature-rise period, it is to avoid drop
The too fast evaporation in atomization process is torn in the early stage, so as to reduce the formation of special-shaped granule, improves granule
Sphericity.
Compared with prior art, the present invention also has following clear advantage：
1st, the product particle sphericity that present configuration is obtained under the equal flow of equal working condition pressure is high and thin
Powder amount is few；
2nd, simple structure, easy for installation, work space is little；
3rd, can be adapted to various pressure atomizers, it is unrestricted to the atomization angle of nozzle.
Hereinafter will be described the present invention by embodiment.In following examples and comparative example,
The various raw materials for being used are all from commercially available.
In the following Examples and Comparative Examples, the spray dryer processes catalyst within the unit interval
The ability of the amount of slurry is identical.
Embodiment 1
The present embodiment is dried the slurry for preparing catalyst using the spray dryer that the present invention is provided.
The spray dryer of the present embodiment contains centrifugal spraying nozzle as shown in Figure 1.
By high-pressure pump by catalyst pulp (total content of Kaolin and boehmite be 40 weight %)
It is introduced in centrifugal spraying nozzle from material inlet, centrifugation masterpiece of the slurry in the rotating disk of high-speed rotation
With lower accelerated, then spray to form mist cone into the tower body of the spray dryer from orifice,
Wherein, the cone angle of the mist cone is to be full of from the dry wind allotter in 120 degree, the tower body
High-temperature hot-air.Meanwhile, from protection wind entrance, (1) introduces protection wind, and the protection wind is via protection wind
Guiding tube and protection wind jet spray to the tower body to surround the mist cone so that the mist
The outer surface of cone is relatively isolated with the high-temperature hot-air in tower, wherein, the protection wind is in the protection wind
Flow at jet is 2.5m3The protection wind and institute at/min, and the protection wind jet
The temperature difference for stating the high-temperature hot-air at the puff prot of dry wind allotter is 450 DEG C, the protection wind guiding
The external diameter of pipe 10mm bigger than the radius of the centrifugal type atomizer on same plane, the guarantor of annular
The external diameter of shield wind jet is 1.2 with the diameter ratio of the atomizing disk：1.The catalyst pulp is formed
Droplet under the isolation of protection wind diverging decline a segment distance, then contact with high-temperature hot-air, in droplet
Moisture is evaporated, and leaves solid constituent, forms catalyst granules, wherein, product fine powder is with spray dried
A tail wind in dry tower draws tower body to separator from a tail wind outlet.By the separation wind of the separator
The low temperature a tail wind of outlet is introduced in blower fan, and the low temperature a tail wind part from the blower fan is by separating
Outside wind arrange mouth discharge spray dryer, another part to protect wind in the form of follow in the nozzle
Ring.
Catalyst particle size distribution is determined by laser particle analyzer, particle diameter is between 20-149 μm
Granule account for 92.1%, measure catalyst spherical degree (using sphericity instrument determine obtain, similarly hereinafter) be
0.93。
Embodiment 2
The present embodiment is dried the slurry for preparing catalyst using the spray dryer that the present invention is provided.
The spray dryer of the present embodiment contains centrifugal spraying nozzle as shown in Figure 1.
By high-pressure pump by catalyst pulp (total content of Kaolin and boehmite be 40 weight %)
It is introduced in centrifugal spraying nozzle from material inlet, centrifugation masterpiece of the slurry in the rotating disk of high-speed rotation
With lower accelerated, then spray to form mist cone into the tower body of the spray dryer from orifice,
Wherein, the cone angle of the mist cone is to be full of from the dry wind allotter in 110 degree, the tower body
High-temperature hot-air.Meanwhile, from protection wind entrance, (1) introduces protection wind, and the protection wind is via protection wind
Guiding tube and protection wind jet spray to the tower body to surround the mist cone so that the mist
The outer surface of cone is relatively isolated with the high-temperature hot-air in tower, wherein, the protection wind is in the protection wind
Flow at jet is 2.8m3The protection wind and institute at/min, and the protection wind jet
The temperature difference for stating the high-temperature hot-air at the puff prot of dry wind allotter is 430 DEG C, the protection wind guiding
The external diameter of pipe 12mm bigger than the radius of the centrifugal type atomizer on same plane, the guarantor of annular
The external diameter of shield wind jet is 1.3 with the diameter ratio of the atomizing disk：1.The catalyst pulp is formed
Droplet under the isolation of protection wind diverging decline a segment distance, then contact with high-temperature hot-air, in droplet
Moisture is evaporated, and leaves solid constituent, forms catalyst granules, wherein, product fine powder is with spray dried
A tail wind in dry tower draws tower body to separator from a tail wind outlet.By the separation wind of the separator
The low temperature a tail wind of outlet is introduced in blower fan, and the low temperature a tail wind part from the blower fan is by separating
Outside wind arrange mouth discharge spray dryer, another part to protect wind in the form of follow in the nozzle
Ring.
Catalyst particle size distribution is determined by laser particle analyzer, particle diameter is between 20-149 μm
Granule account for 92.3%, measure catalyst spherical degree for 0.94.
Embodiment 3
The present embodiment is dried the slurry for preparing catalyst using the spray dryer that the present invention is provided.
The spray dryer of the present embodiment contains centrifugal spraying nozzle as shown in Figure 1.
By high-pressure pump by catalyst pulp (total content of Kaolin and boehmite be 40 weight %)
It is introduced in centrifugal spraying nozzle from material inlet, centrifugation masterpiece of the slurry in the rotating disk of high-speed rotation
With lower accelerated, then spray to form mist cone into the tower body of the spray dryer from orifice,
Wherein, the cone angle of the mist cone is to be full of from the dry wind allotter in 100 degree, the tower body
High-temperature hot-air.Meanwhile, from protection wind entrance, (1) introduces protection wind, and the protection wind is via protection wind
Guiding tube and protection wind jet spray to the tower body to surround the mist cone so that the mist
The outer surface of cone is relatively isolated with the high-temperature hot-air in tower, wherein, the protection wind is in the protection wind
Flow at jet is 2.3m3The protection wind and institute at/min, and the protection wind jet
The temperature difference for stating the high-temperature hot-air at the puff prot of dry wind allotter is 440 DEG C, the protection wind guiding
The external diameter of pipe 14mm bigger than the radius of the centrifugal type atomizer on same plane, the guarantor of annular
The external diameter of shield wind jet is 1.4 with the diameter ratio of the atomizing disk：1.The catalyst pulp is formed
Droplet under the isolation of protection wind diverging decline a segment distance, then contact with high-temperature hot-air, in droplet
Moisture is evaporated, and leaves solid constituent, forms catalyst granules, wherein, product fine powder is with spray dried
A tail wind in dry tower draws tower body to separator from a tail wind outlet.By the separation wind of the separator
The low temperature a tail wind of outlet is introduced in blower fan, and the low temperature a tail wind part from the blower fan is by separating
Outside wind arrange mouth discharge spray dryer, another part to protect wind in the form of follow in the nozzle
Ring.
Catalyst particle size distribution is determined by laser particle analyzer, particle diameter is between 20-149 μm
Granule account for 91.7%, measure catalyst spherical degree for 0.93.
Comparative example 1
This comparative example is carried out using method similar to Example 1, except that, in this comparative example
Do not contain in nozzle and introduce the unit of protection wind, namely do not introduce the protection wind, in particular：
By high-pressure pump by catalyst pulp (total content of Kaolin and boehmite be 40 weight %)
It is introduced in nozzle from material inlet, slurry rotates at a high speed in material cavity, then by nozzle head
Material jet sprays to form mist cone into the tower body of the spray dryer, wherein, the mist cone
Cone angle be 120 degree, the high-temperature hot-air from the dry wind allotter is full of in the tower body.It is described
The droplet that catalyst pulp is formed diverging in the tower full of high-temperature hot-air declines a segment distance, in droplet
Moisture is evaporated, and leaves solid constituent, forms catalyst granules, wherein, product fine powder is with spray dried
A tail wind in dry tower draws tower body to separator from a tail wind outlet.
Catalyst particle size distribution is determined by laser particle analyzer, particle diameter is between 20-149 μm
Granule account for 84.9%, measure catalyst spherical degree for 0.91.
Can be seen that using containing of the present invention by the result of above-mentioned comparative example 1 and embodiment 1-3
Nozzle microsphere explosion in dry run is can solve the problem that when being spray-dried, special-shaped and fine powder is produced
Problem so that the particle diameter distribution for obtaining is concentrated, and fine powder amount is few, and can improve acquisition
Dry particle sphericity.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited to above-mentioned
Detail in embodiment, in the range of the technology design of the present invention, can be to the skill of the present invention
Art scheme carries out various simple variants, and these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid not
Necessary repetition, the present invention is no longer separately illustrated to various possible compound modes.
Additionally, combination in any can also be carried out between a variety of embodiments of the present invention, as long as
, without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention for it.
Claims (9)
1. a kind of centrifugal spraying nozzle, it is characterised in that the nozzle includes：
Centrifugal type atomizer (1), is provided with for being by material injection in the centrifugal type atomizer (1)
The atomizing disk (3) with orifice (2) of droplet, and be provided with the connection atomizing disk (3) and
The material conduit (5) of material inlet (4)；And protection wind guiding tube (6), the protection wind guiding tube
(6) protection wind entrance (7) and protection wind jet (8) are provided with；
Protection wind guiding tube (6) is arranged around the centrifugal type atomizer (1) so that by described
The protection bellows chamber that protection wind jet (8) sprays encloses the mist drop ejected by the orifice (2)
Material.
2. centrifugal spraying nozzle according to claim 1, it is characterised in that the protection wind
Jet (8) is the annular spray mouth around the atomizing disk (3) arrangement.
3. centrifugal spraying nozzle according to claim 2, it is characterised in that annular it is described
The external diameter and the diameter ratio of the atomizing disk (3) of protection wind jet (8) is more than 1：1 to little
In equal to 50：1.
4. the centrifugal spraying nozzle according to any one in claim 1-3, its feature exists
In the plane that is located parallel to the atomizing disk (3) of cross section of protection wind jet (8).
5. centrifugal spraying nozzle according to claim 1, it is characterised in that the protection wind
The external diameter of guiding tube (6) 2-30mm bigger than the radius of the centrifugal type atomizer (1) on same plane.
6. a kind of spray dryer, the spray dryer includes spray drying tower, it is characterised in that institute
The centrifugal spraying nozzle that spray dryer also includes according to any one in claim 1-5 is stated,
The nozzle is arranged at the tower body top of the spray drying tower.
7. spray dryer according to claim 6, it is characterised in that the spray drying tower
Tower body include cylindrical part and the tapered portion that is connected to below the cylindrical part, set at the top of the cylindrical part
Dry wind allotter (15) is equipped with, the bottom of the tapered portion is provided with material outlet (9), described
Cylindrical part is provided with a tail wind outlet (10) with the connecting portion of the tapered portion.
8. spray dryer according to claim 7, it is characterised in that the spray dryer
Also the separator (11) that (10) connect is exported with a tail wind including entrance, the separator (11)
Separate wind outlet (12) to connect with protection wind entrance (7), with to protection wind jet (8)
Protection wind is provided.
9. spray dryer according to claim 8, it is characterised in that the separation wind outlet
(12) pipeline communication of blower fan (13), the wind are provided by with protection wind entrance (7)
Pipeline between machine (13) and protection wind entrance (7) is additionally provided with to separate and arrange outside wind mouth (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510691501.3A CN106607197A (en) | 2015-10-22 | 2015-10-22 | Centrifugal atomizing nozzle and spray dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510691501.3A CN106607197A (en) | 2015-10-22 | 2015-10-22 | Centrifugal atomizing nozzle and spray dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106607197A true CN106607197A (en) | 2017-05-03 |
Family
ID=58610541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510691501.3A Pending CN106607197A (en) | 2015-10-22 | 2015-10-22 | Centrifugal atomizing nozzle and spray dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106607197A (en) |
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| CN108246530A (en) * | 2018-01-31 | 2018-07-06 | 苏州极汇科技有限公司 | A kind of centrifugal disinfection tower of closed farm |
| CN108311304A (en) * | 2018-01-31 | 2018-07-24 | 苏州极汇科技有限公司 | A kind of centrifugal health care chemical spraying device and its method |
| WO2021036385A1 (en) * | 2019-08-30 | 2021-03-04 | 厦门金达威维生素有限公司 | Atomizing tray, spray drying atomizer and high viscosity material atomizing method therefor |
| CN112524902A (en) * | 2020-12-09 | 2021-03-19 | 江西倍得力生物工程有限公司 | Spray drying device is used in black-bone chicken peptide powder production |
| CN113510057A (en) * | 2021-04-27 | 2021-10-19 | 金溪县金港实业有限公司 | Sports equipment production is with novel machine of spraying plastics |
| CN113617044A (en) * | 2021-08-16 | 2021-11-09 | 邵东智能制造技术研究院有限公司 | Counter-flow spray drying equipment |
| CN113634385A (en) * | 2021-07-12 | 2021-11-12 | 中国人民解放军国防科技大学 | Vortex spraying atomization device |
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| CN113634385A (en) * | 2021-07-12 | 2021-11-12 | 中国人民解放军国防科技大学 | Vortex spraying atomization device |
| CN113634385B (en) * | 2021-07-12 | 2022-04-01 | 中国人民解放军国防科技大学 | Vortex spraying atomization device |
| CN113617044A (en) * | 2021-08-16 | 2021-11-09 | 邵东智能制造技术研究院有限公司 | Counter-flow spray drying equipment |
| CN113617044B (en) * | 2021-08-16 | 2022-06-21 | 邵东智能制造技术研究院有限公司 | Counterflow spray drying apparatus |
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Application publication date: 20170503 |