CN113578487A - Jet flow nozzle - Google Patents
Jet flow nozzle Download PDFInfo
- Publication number
- CN113578487A CN113578487A CN202110835378.3A CN202110835378A CN113578487A CN 113578487 A CN113578487 A CN 113578487A CN 202110835378 A CN202110835378 A CN 202110835378A CN 113578487 A CN113578487 A CN 113578487A
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- Prior art keywords
- nozzle
- resonant cavity
- cavity
- diameter
- jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
Abstract
The invention relates to a jet flow spray head which is arranged at the liquid outlet end of a high-pressure pump and comprises an upper spray nozzle, a resonant cavity and a lower spray nozzle, wherein the upper spray nozzle is connected with the resonant cavity, the resonant cavity is connected with the lower spray nozzle, and the axes of the upper spray nozzle, the resonant cavity and the lower spray nozzle are collinear. The resonant cavity and the lower nozzle are cylindrical cavities, the upper nozzle comprises a conical cavity and a cylindrical cavity, and the conical cavity and the cylindrical cavity are integrally formed. The lower nozzle has a diameter greater than the diameter of the upper nozzle tip and defines a diameter ratio of the upper nozzle tip diameter to the resonant cavity. Compared with a nozzle with a single bell-mouthed flow channel, the jet nozzle provided by the invention has obvious advantages in the aspect of material crushing, and can obtain superfine grain size. Compared with a homogenizing valve of a high-pressure homogenizer, the jet flow nozzle provided by the invention has the advantages that the pressure for obtaining the same particle size is lower, the service life of each component of the flow channel unit can be greatly prolonged, the technical implementation difficulty is reduced, the economic benefit can be improved, and the energy consumption can be reduced.
Description
Technical Field
The invention relates to the field of material crushing, in particular to ultrafine crushing of food. In particular to a jet nozzle.
Background
The principle of high-pressure jet milling is different from conventional mill grinding equipment. Firstly, coarse pulp after coarse grinding is pressurized to working pressure in a high-pressure jet mill, then the pressurized coarse pulp passes through a specially designed pore channel structure, at the moment, the coarse pulp flows in the pore channel at high speed, and particles in the coarse pulp realize crushing and refining under the high shearing, collision and cavitation effects generated in the high-speed flow process. The high-pressure jet crushing technology can be applied to the fields of food, medicine, daily chemicals, coating and the like. Particularly in the field of food processing, the peel residue, the grain and the fiber components of the food materials are also crushed and refined in the process, and the uniform suspension state is achieved. Under the condition of high-pressure jet flow, besides the particles in the slurry can be further crushed, the molecular conformation and the charging condition of the food components can be changed, so that the texture state of the slurry can be changed to a great extent. The taste of the beverage is improved, the stability is greatly improved, and the use of the emulsifier stabilizer can be reduced.
Technical scheme of prior art
The similar equipment as jet flow crushing is a high pressure homogenizer which utilizes the crushing principle of high shearing and cavitation effect, but has essential difference in structure, and the flow passage is a narrow annular gap, and the pressure and the grain size are controlled by adjusting the size of the gap.
Disadvantages of the prior art
The crushing unit is easy to wear under the ultrahigh pressure working condition, and the service life is short; the crushing particle size is closely related to pressure, and the obtaining of finer particle size can only be realized by increasing the pressure, so that the technical bottleneck exists;
disclosure of Invention
Aiming at the defects in the prior art, the invention aims to: under the prerequisite that does not improve current crushing pressure, increase the resonant cavity structure, utilize fluidic self-excited vibration technique, improve the crushing effect of material, especially the crushing of fibre class material reduces the degree of difficulty and the cost that the technique was realized. Meanwhile, a sound wave generator is additionally arranged at the liquid inlet end, and harmonic resonance is generated in the jet flow nozzle by external high-frequency vibration and self-excited vibration of fluid, so that the crushed particle size is more ultrafine.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a jet flow spray head is arranged at a liquid outlet end of a high-pressure pump and comprises an upper spray nozzle 1, a resonant cavity 2 and a lower spray nozzle 3, wherein the upper spray nozzle 1 is connected with the resonant cavity 2, the resonant cavity 2 is connected with the lower spray nozzle 3, the diameter of the lower spray nozzle 3 is larger than that of the tail end of the upper spray nozzle 1, and the diameter ratio of the tail end of the upper spray nozzle 1 to the resonant cavity 2 is 1: 4-1: 10.
On the basis of the scheme, the upper nozzle 1, the resonant cavity 2 and the lower nozzle 3 are made of diamond.
On the basis of the scheme, the axes of the upper nozzle 1, the resonant cavity 2 and the lower nozzle 3 are collinear.
On the basis of the scheme, the resonant cavity 2 and the lower nozzle 3 are cylindrical cavities, the upper nozzle 1 comprises a conical cavity and a cylindrical cavity, and the conical cavity and the cylindrical cavity are integrally formed.
On the basis of the scheme, the ratio of the diameter of the resonant cavity 2 to the length of the resonant cavity 2 is 1: 1.
On the basis of the scheme, the working pressure of the jet flow spray head is as follows: 50 to 130 MPa.
On the basis of the scheme, the jet flow spray head further comprises a sound wave generator, the sound wave generator is arranged at the liquid outlet end of the high-pressure pump, and the frequency of the sound wave generator is an integral multiple of the inherent frequency of the resonant cavity 2;
the natural frequency of the resonant cavity 2 is calculated by formula 1:
wherein c is the speed of sound; d1Diameter of the upper nozzle 1, D2Is the diameter of the resonant cavity 2, lambda is the length-diameter ratio of the upper nozzle 1, L2The length of the cavity 2.
On the basis of the scheme, the jet spray head further comprises a collision wall 4, and the collision wall 4 is arranged in front of the lower nozzle 3.
On the basis of the scheme, the collision wall 4 is arranged 3-10mm in front of the lower nozzle 3.
The invention also protects the application of the jet nozzle in food material crushing.
The working principle of the invention is as follows:
the fluid is accelerated by the upper nozzle 1 and enters the resonant cavity 2, the fluid can generate self-excited oscillation, namely, the periphery of the jet flow generates axisymmetric disturbed flow fluctuation, the fluctuation has certain frequency, the frequency is related to the diameter of the upper nozzle 1 and the jet flow speed, the fluctuation can be reserved in the resonant cavity, and the cavitation effect generated by the jet flow is enhanced; the central part enters the lower nozzle 3 again and then is accelerated again to obtain the maximum jet velocity, and simultaneously, the pressure drops sharply to meet the high shearing and cavitation required by crushing.
The space of the resonant cavity 2 is limited, the retained fluid is increased continuously, and the surplus fluid is converged into the jet flow again and is sprayed out through the lower nozzle 3.
The upper nozzle 1, the resonant cavity 2 and the lower nozzle 3 are sequentially connected from front to back, the diameter of the lower nozzle 3 is slightly larger than that of the upper nozzle 1, and the diameter and the length of the resonant cavity 2 are related to the diameter of the tail end of the upper nozzle 1.
The fluid obtains the maximum velocity after passing through the lower nozzle 3, and the fluid collides and spreads at the collision wall 4, so that the high-velocity fluid is instantaneously decelerated and the pulverization is assisted.
Before fluid enters the upper nozzle 1, the fluid is excited to vibrate by the sound wave generator 5, when the fluid enters the resonant cavity 2, self-excited vibration is generated, if the frequency of the two vibrations meets the resonance condition, a resonance reaction is generated in the resonant cavity, and the crushing effect is enhanced and amplified.
The beneficial effects of the invention are as follows:
compared with a nozzle with a single bell-mouth flow channel, the jet nozzle provided by the invention has obvious advantages in the aspect of material crushing, and can obtain superfine grain size.
Compared with a homogenizing valve of a high-pressure homogenizer, the jet flow nozzle provided by the invention has the advantages that the pressure for obtaining the same particle size is lower, the service life of each component of the flow channel unit can be greatly prolonged, the technical implementation difficulty is reduced, the economic benefit can be improved, and the energy consumption can be reduced.
Drawings
The invention has the following drawings:
fig. 1 is a schematic sectional view of the structure of a jet spray head of the present invention.
Fig. 2 is a schematic sectional view of a jet nozzle structure with an additional collision wall.
Fig. 3 is a schematic sectional view of a jet spray head structure with an acoustic wave generator.
Fig. 4 is a schematic cross-sectional view of a nozzle of a conventional single bell-mouth flow passage.
FIG. 5 is a graph comparing the pulverizing effect of the nozzle of the present invention with a single bell-mouth flow channel.
FIG. 6 is a graph comparing the grinding particle diameter D90 of soybean milk when the diameter of the upper nozzle end is different from the diameter of the resonance chamber in the present invention.
Reference numerals:
1-upper nozzle, 2-resonant cavity, 3-lower nozzle. 4-collision wall. 5-sound wave generator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1 to 6.
Fig. 1 to 3 show the jet spray head provided by the invention, which is installed at the liquid outlet end of a high-pressure pump, and comprises an upper nozzle 1, a resonant cavity 2 and a lower nozzle 3, wherein the upper nozzle 1, the resonant cavity 2 and the lower nozzle 3 are made of diamond. The upper nozzle 1 is connected with the resonant cavity 2, the resonant cavity 2 is connected with the lower nozzle 3, and the axes of the upper nozzle 1, the resonant cavity 2 and the lower nozzle 3 are collinear. The resonant cavity 2 and the lower nozzle 3 are cylindrical cavities, the upper nozzle 1 comprises a conical cavity and a cylindrical cavity, and the conical cavity and the cylindrical cavity are integrally formed. The diameter of the lower nozzle 3 is larger than that of the tail end of the upper nozzle 1, and the diameter ratio of the tail end of the upper nozzle 1 to the resonant cavity 2 is 1: 4-1: 10. The ratio of the diameter of the resonant cavity 2 to the length of the resonant cavity 2 is 1: 1.
On the basis of the scheme, the working pressure of the jet flow spray head is as follows: 50 to 130 MPa.
On the basis of the scheme, the jet flow nozzle further comprises a sound wave generator, the sound wave generator is arranged at the liquid outlet end of the high-pressure pump, and the frequency of the sound wave generator is integral multiple of the natural frequency of the resonant cavity 2.
The natural frequency of the resonant cavity 2 is calculated by formula 1:
wherein c is the speed of sound; d1Diameter of the upper nozzle 1, D2Is the diameter of the resonant cavity 2, lambda is the length-diameter ratio of the upper nozzle 1, L2The length of the cavity 2.
On the basis of the scheme, the jet flow nozzle further comprises a collision wall 4, and the collision wall 4 is arranged 3-10mm in front of the lower nozzle 3.
The invention also protects the application of the jet nozzle in food material crushing.
Fig. 4 shows a nozzle with a single bell-mouth flow passage, which is provided by the present invention, and compared with the nozzle with a single bell-mouth flow passage, the present invention has obvious advantages in material crushing, and can obtain a more ultra-fine particle size.
FIG. 5 is a comparison of the pulverizing effect of the nozzle of the jet nozzle and the nozzle of a single bell-mouth flow channel provided by the present invention,
in the comparative example, soybean milk is used as a material raw material, as can be seen from fig. 5, after the soybean milk is pulverized by the jet nozzle provided by the invention, the whole particle size of the soybean milk is obviously reduced, the pulverizing fineness of the soybean milk passing through the nozzle of a single bell-mouth flow passage is D90-82 micrometers, and the pulverizing fineness of the soybean milk passing through the jet nozzle shown in fig. 1 is D90-62 micrometers; after being crushed by the jet flow nozzle provided with the collision wall shown in figure 2 of the invention, the crushing fineness D90 is 48 microns; after the mixture is crushed by a jet flow nozzle which is provided with a sound wave generator and is shown in figure 3 of the invention, the crushing fineness D90 is 30 microns.
FIG. 6 is a graph comparing the grinding particle diameter D90 of soybean milk when the diameter of the end of the upper nozzle 1 is different from the diameter of the cavity 2 in the present invention.
It can be seen that the diameter ratio of the end of the upper nozzle 1 to the resonant cavity 2 has different effects on the crushing effect, and the diameter ratio of the end of the upper nozzle 1 to the resonant cavity 2 is preferably 1: 4-1: 10.
Compared with a homogenizing valve of a high-pressure homogenizer, the homogenizing valve of the high-pressure homogenizer has the advantages that the pressure for obtaining the same particle size is lower, the service life of each component of the flow passage unit can be greatly prolonged, the technical implementation difficulty is reduced, the economic benefit can be improved, and the energy consumption can be reduced.
Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. The jet flow spray head is characterized by being arranged at a liquid outlet end of a high-pressure pump and comprising an upper spray nozzle (1), a resonant cavity (2) and a lower spray nozzle (3), wherein the upper spray nozzle (1) is connected with the resonant cavity (2), the resonant cavity (2) is connected with the lower spray nozzle (3), the diameter of the lower spray nozzle (3) is larger than that of the tail end of the upper spray nozzle (1), and the diameter ratio of the diameter of the tail end of the upper spray nozzle (1) to that of the resonant cavity (2) is 1: 4-1: 10.
2. Jet nozzle according to claim 1, characterized in that the upper nozzle (1), the resonator (2) and the lower nozzle (3) are made of diamond.
3. Jet nozzle according to claim 1, characterized in that the axes of the upper nozzle (1), the resonant cavity (2) and the lower nozzle (3) are collinear.
4. Jet nozzle according to claim 1, characterized in that the resonant cavity (2) and the lower nozzle (3) are cylindrical cavities, and the upper nozzle (1) comprises a conical cavity and a cylindrical cavity, the conical cavity and the cylindrical cavity being formed integrally.
5. Jet nozzle according to claim 4, characterized in that the ratio of the diameter of the resonance chamber (2) to the length of the resonance chamber (2) is 1: 1.
6. The fluidic spray head of claim 1, wherein the operating pressure of the fluidic spray head is: 50 to 130 MPa.
7. The jet nozzle according to claim 1, characterized in that it further comprises a sound generator, which is arranged at the outlet end of the high-pressure pump, the frequency of the sound generator being an integer multiple of the natural frequency of the resonant cavity (2);
the natural frequency of the resonant cavity (2) is calculated by the formula (1):
wherein c is the speed of sound; d1Is the diameter of the upper nozzle (1), D2Is the diameter of the resonant cavity (2), lambda is the length-diameter ratio of the upper nozzle (1), L2Is the length of the resonant cavity (2).
8. Jet nozzle according to claim 1, characterized in that it further comprises an impact wall (4), which impact wall (4) is arranged in front of the lower nozzle (3).
9. Jet nozzle according to claim 8, characterized in that the collision wall (4) is arranged 3-10mm in front of the lower nozzle (3).
10. Use of a jet nozzle as claimed in any one of claims 1 to 9 in the comminution of food materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110835378.3A CN113578487A (en) | 2021-07-23 | 2021-07-23 | Jet flow nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110835378.3A CN113578487A (en) | 2021-07-23 | 2021-07-23 | Jet flow nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113578487A true CN113578487A (en) | 2021-11-02 |
Family
ID=78249183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110835378.3A Pending CN113578487A (en) | 2021-07-23 | 2021-07-23 | Jet flow nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113578487A (en) |
-
2021
- 2021-07-23 CN CN202110835378.3A patent/CN113578487A/en active Pending
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