CN111229418B - Nano pearl powder slurry and preparation process thereof - Google Patents
Nano pearl powder slurry and preparation process thereof Download PDFInfo
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- CN111229418B CN111229418B CN202010057953.7A CN202010057953A CN111229418B CN 111229418 B CN111229418 B CN 111229418B CN 202010057953 A CN202010057953 A CN 202010057953A CN 111229418 B CN111229418 B CN 111229418B
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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
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
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Abstract
The invention discloses a nano pearl powder slurry and a preparation process thereof, and the preparation process comprises the following steps: crushing Margarita to obtain Margarita powder; continuously pressing pearl powder into the crushing chamber by using high-pressure dispersion liquid, performing vortex rotation motion in the crushing chamber by using the high-pressure dispersion liquid, further crushing the pearl powder by collision between the pearl powder and the inner wall of the crushing chamber when the pearl powder moves along the periphery of a vortex, arranging a discharge port with a filter screen at the top end of the crushing chamber, and discharging the crushed pearl powder reaching a preset particle size to a vortex center through the discharge port to obtain nano pearl powder slurry. Irregular turbulence is formed in the crushing chamber through the high-pressure dispersion liquid, the pearl powder particles are crushed, and the high-pressure dispersion liquid flow rotates at a high speed in the crushing chamber to enable the fluid to form a plurality of irregular small vortexes, so that the pearl powder particles in the crushing chamber are also in an irregular state, and the fine pearl powder particles continuously impact and rub with each other in the swirling flow process to achieve the nano-grade crushing effect.
Description
Technical Field
The invention relates to the technical field of crushing, in particular to nano pearl powder slurry and a preparation process thereof.
Background
With the improvement of living standard of people and the progress of pearl artificial breeding technology, the demand of people for pearls is more and more large. The pearl powder, especially the nano pearl powder, has strong cleaning capability of removing skin grease dirt, the pearl powder can reach the granularity of 1/200 pores of a human body after being nanocrystallized, the skin can be quickly and directly absorbed, and certain nano pearl powder is added into the cosmetics to clean the skin and present the most basic healthy skin color; the nano pearl powder has certain protective capacity to skin irradiated by ultraviolet rays, the finer the granularity is, the stronger the protective capacity is, meanwhile, the natural organic components of the pearl powder can promote the synthesis of new cells, continuously supplement nutrition to the surface layer of the skin, maintain the normal secretion of estrogen, make the skin smooth and fine, and remove melanin to achieve the effects of whitening and whitening skin color. Because the nano pearl powder has the advantages, people have higher and higher requirements on the granularity of the pearl powder, and the natural organic components such as taurine, polypeptide, trace elements required by human bodies and the like in the pearl are required not to be damaged when the granularity of the pearl powder is required.
At present, the pearl powder with volume fraction of more than 55 percent and granularity of less than 1um defined in international standard GB/T36930-2018 is the superfine pearl powder, because the hardness of the pearl is higher, the common crushing mode in the market at present adopts a superfine crusher and an airflow crusher, but the crushing granularity limit of the superfine crusher to the powder is in the thousand mesh range, and the crushing limit of the airflow crusher is also in the range of 2-5um, so that the nano-grade pearl powder is difficult to obtain.
Disclosure of Invention
The invention mainly aims to provide nano pearl powder slurry and a preparation process thereof, and aims to solve the technical problems that the existing pearl powder is low in crushing efficiency and difficult to achieve nano-grade crushed particle size.
In order to achieve the purpose, the invention provides a preparation process of nano pearl powder slurry, which comprises the following steps: crushing Margarita to obtain Margarita powder;
continuously pressing the pearl powder into a crushing chamber by using high-pressure dispersion liquid, wherein the high-pressure dispersion liquid performs vortex rotation motion in the crushing chamber, the pearl powder is further crushed by mutual collision and collision between the pearl powder and the inner wall of the crushing chamber when the pearl powder moves along the periphery of a vortex, a discharge port with a filter screen is arranged at the top end of the crushing chamber, and the pearl powder which reaches a preset particle size after being crushed moves to a vortex center and is discharged through the discharge port to obtain nano pearl powder slurry;
the pressure of the high-pressure dispersion liquid is greater than 10MPa, the aperture of the filter screen is less than 120nm, and the preset particle size is consistent with the aperture of the filter screen;
the high-pressure dispersion liquid comprises the following components in percentage by mass: 86 to 93 percent of ultrapure water, 2.38 to 3.5 percent of ethanol, 1 to 4 percent of ethylene glycol, 0.5 to 1.6 percent of propylene glycol and 1.3 to 5 percent of glycerol.
Preferably, a liquid inlet is formed in the side wall of the crushing chamber, the high-pressure dispersion liquid is continuously pumped into the liquid inlet, and the incident angle of the high-pressure dispersion liquid is consistent with the rotation direction of the vortex.
Preferably, the mass ratio of the pearl powder to the high-pressure dispersion liquid is 15-25%.
Preferably, in the step of continuously pressing the pearl powder into the crushing chamber by using the high-pressure dispersion liquid, the pearl powder is pressed once every 2-3 hours.
Preferably, the incident direction of the high-pressure dispersion liquid and the tangent line at the incident opening of the crushing chamber form an incident angle alpha, and the incident angle alpha is 30-40 degrees.
Preferably, the temperature of the high-pressure dispersion liquid is 35-50 ℃.
Preferably, in the step of crushing pearls to obtain pearl powder, the pearls are crushed to have the particle size of less than 325 meshes.
In addition, the invention also provides the nano pearl powder slurry prepared by the preparation process of the nano pearl powder slurry.
The nano pearl powder slurry and the preparation process thereof have the following beneficial effects: irregular turbulence is formed in the crushing chamber through the high-pressure dispersion liquid to crush the pearl powder particles, because the wall vortex spreads into the fluid due to the viscosity of the fluid flow, and the fluid is in high-speed rotation, the interaction makes the fluid form a plurality of irregular small vortexes, so that the pearl powder particles in the crushing cavity are also in an irregular state, the fine pearl powder particles continuously collide and rub with each other in the continuous rotational flow process to achieve the nano-grade crushing effect without agglomeration, when the particle size is less than 800nm, the pearl powder slurry swirls to the center point of the vortex due to the action of centrifugal force, the pearl powder is discharged from the central discharge hole, and simultaneously, the high-pressure dispersion liquid is pumped into the liquid inlet, and continuous vortex action is formed by continuously pumping the double high-pressure dispersion liquids, so that energy dissipation when the high-pressure dispersion liquid collides with the inner wall of the crushing chamber is avoided, and the crushing efficiency of the pearl powder is improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention in the prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to the structures shown in the drawings without creative efforts, and the achievement, functional features and advantages of the object of the present invention will be further explained with reference to the drawings in combination with the embodiments.
FIG. 1 is a schematic view showing the direction of incidence of a high-pressure dispersion in a pulverization chamber according to the present invention.
The reference numbers illustrate: 1-crushing chamber, 2-entrance port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications such as up, down, left, right, front, and rear … … are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, motion, and the like between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indications are changed accordingly.
The invention provides a preparation process of nano pearl powder slurry, which is mainly used for preparing the nano pearl powder slurry, and the nano pearl powder slurry is mainly used in cosmetics and is used as one of main components of the cosmetics, so that the skin cell regeneration can be promoted, partial ultraviolet rays can be blocked, and the effects of whitening and brightening the skin can be achieved.
In one embodiment of the invention, a preparation process of nano pearl powder slurry comprises the following steps:
crushing Margarita to obtain Margarita powder;
continuously pressing the pearl powder into a crushing chamber 1 by using high-pressure dispersion liquid, wherein the high-pressure dispersion liquid makes vortex rotation motion in the crushing chamber 1, the pearl powder collides with each other and the pearl powder collides with the inner wall of the crushing chamber 1 when the pearl powder moves along the periphery of a vortex to further crush the pearl powder, a discharge port with a filter screen is arranged at the top end of the crushing chamber 1, and the pearl powder which reaches a preset particle size after being crushed moves to the center of the vortex and is discharged through the discharge port to obtain nano pearl powder slurry;
the pressure of the high-pressure dispersion liquid is greater than 10MPa, the aperture of the filter screen is less than 120nm, and the preset particle size is consistent with the aperture of the filter screen;
the high-pressure dispersion liquid comprises the following components in percentage by mass: 86 to 93 percent of ultrapure water, 2.38 to 3.5 percent of ethanol, 1 to 4 percent of ethylene glycol, 0.5 to 1.6 percent of propylene glycol and 1.3 to 5 percent of glycerol.
Specifically, the early coarse crushing of pearl powder mainly improves the crushing efficiency of subsequent high-pressure dispersion liquid, the high-pressure dispersion liquid and pearl powder are simultaneously pumped into the crushing chamber 1 through a multistage high-pressure piston pump, the high-pressure dispersion liquid pumped into the crushing chamber 1 forms irregular turbulence in the crushing chamber 1, the pearl powder particles have excellent crushing effect, wall surface vortex diffuses towards the fluid due to the viscous action of liquid flow, meanwhile, the fluid is in high-speed rotation, the interaction enables the fluid to form a plurality of irregular small vortexes, the pearl powder particles in the crushing chamber are also in an irregular state, the turbulence degree is higher than that of air flow crushing, the fine pearl powder particles continuously impact and rub with each other in the continuous swirling process, the nano-scale crushing effect is achieved, no agglomeration is generated, when the particle size of the pearl powder is less than 120nm, the slurry swirls to the center point of the vortex due to the action of centrifugal force, and flows out from the central discharge hole. Because the electrostatic field intensity on the surface of the pearl powder is high, and the adsorption agglomeration action exists among powder particles, a dispersing agent is required to be added to disperse the slurry, the components of the high-pressure dispersion liquid contain ethanol which is adsorbed on the surfaces of the pearl powder particles, so that the wettability of the high-pressure dispersion liquid on the pearl powder is enhanced, the dispersion action is realized, meanwhile, the ethanol also has the antibacterial action in the preparation process of the pearl powder slurry, the prepared nano pearl powder slurry is sterile and can be directly used, and the viscosity of the ethanol, the ethylene glycol, the propylene glycol and the glycerol is low, so that the pearl powder can be crushed. The pearl powder has the advantages that the granularity of the pearl powder is reduced at the early stage of crushing, the crushing speed of the pearl powder is slower and slower along with the prolonging of the crushing time, and the crushing difficulty is increased due to the fact that the pearl powder particles are smaller and smaller, the structural defects are fewer and less, and the strength is improved. The pressure of the high-pressure dispersion liquid is greater than 10MPa, specifically 10-100MPa, when the pressure of the high-pressure dispersion liquid is less than 10MPa, the pearl powder crushing effect is poor, and along with the gradual increase of the pressure, the pearl powder crushing effect is enhanced, but when the pressure exceeds 100MPa, the pearl powder is difficult to crush due to the fact that the pearl powder is small in particle size and high in hardness when the pearl powder is continuously pressurized, and the impact force of the high-pressure liquid flow on the inner wall of the crushing chamber 1 is large, so that the crushing chamber 1 is easily abraded excessively, and the service life is shortened.
Further, a liquid inlet is formed in the side wall of the crushing chamber 1, the high-pressure dispersion liquid is continuously pumped into the liquid inlet, and the incident angle of the high-pressure dispersion liquid is consistent with the rotation direction of the vortex. Therefore, except the high-pressure dispersion liquid pumped with the pearl powder at the same time, the high-pressure dispersion liquid is also continuously pumped into the liquid inlet, the high-pressure dispersion liquid is simultaneously pumped into the crushing chamber 1 at the position 2 to increase the energy of the vortex rotation motion, the incident direction of the high-pressure dispersion liquid is consistent with the rotation direction of the vortex, the high-pressure dispersion liquid continuously makes the vortex rotation motion in the crushing chamber 1, and the crushing efficiency of the pearl powder is improved. The pressure of the high-pressure dispersion liquid which is continuously pressed into the pearl powder in the crushing chamber 1 is greater than the pressure of the high-pressure dispersion liquid which is continuously pumped in from the liquid inlet. Because the high-pressure dispersion liquid pressure when the pearl powder is pressed in is larger, the nano pearl powder slurry can flow out from the discharge port with smaller pressure after being crushed, and can not flow out from the end where the pearl powder is pressed in.
Further, the mass ratio of the pearl powder to the high-pressure dispersion liquid is 15-25%. In the specific pulverizing process of the pearl powder, when the mass of the pearl powder is too large (more than 25%), the viscosity of the blend of the high-pressure dispersion liquid and the pearl powder in the pulverizing chamber 1 is higher, the dispersion effect of the high-pressure dispersion liquid on the pearl powder is poorer, the agglomeration phenomenon is easily generated, so the pulverizing effect is also poor, and when the mass of the pearl powder is too small (less than 15%), the concentration of the pearl powder in the prepared nano pearl powder slurry is lower, and the actual using effect cannot be achieved.
Furthermore, in the step of continuously pressing the pearl powder into the crushing chamber 1 by using the high-pressure dispersion liquid, the pearl powder is pressed once every 2-3 hours. That is, the feeding speed in this embodiment also has a certain influence on the pulverizing efficiency, the pearl powder is fed intermittently, and since the volume of the pulverizing chamber 1 is limited and the pulverizing process of the pearl powder requires a certain time, continuous feeding easily causes the pearl powder in the pulverizing chamber 1 to be excessive, the viscosity increases, the pulverizing efficiency of the pearl powder is reduced, and even the pulverizing equipment is blocked, so that the pearl powder is fed every 2-3 hours.
Further, the incident direction of the high-pressure dispersion liquid and the tangent line at the incident port 2 of the crushing chamber 1 form an incident angle alpha, and the incident angle alpha is 30-40 degrees. As shown in figure 1, the direction that the arrow point pointed to is the incident direction of high-pressure dispersion, the incident angle of high-pressure dispersion is in the scope of 30-40 degrees, guaranteed that the impact force after high-pressure dispersion lets in crushing room 1 is great and can form the whirl fast at the same time, through letting in constantly of high-pressure dispersion make the whirl intensity that forms in crushing room 1 increase constantly, pearl powder can be smashed, after the particle size of pearl powder granule is less than 120nm, because the quality is less, the pearl powder particle motion of small-size particle is to the mid point of whirl and is flowed from central discharge gate together with the high-pressure dispersion at whirl center.
Further, the temperature of the high-pressure dispersion liquid is 35-50 ℃. It can be understood that in the crushing process of the pearl powder, the higher the temperature of the high-pressure dispersion liquid is, the larger the surface energy of the pearl powder particles after the pearl powder particles are introduced into the crushing chamber 1 is, the viscosity of the high-pressure dispersion liquid is reduced, the Brownian motion of the particles is accelerated, and the collision probability among the pearl powder particles is further increased, but when the temperature is higher than 50 ℃, partial heat can be generated due to the vortex rotation motion in the crushing chamber 1, the temperature is usually 10-15 ℃ or higher than the temperature when the pearl powder is pumped, and when the temperature of the high-pressure dispersion liquid reaches more than 65 ℃, partial effective components, namely polypeptide and the like in the pearl powder can lose efficacy under the influence of high temperature, so that the use effect of the nano pearl powder slurry is influenced; when the temperature is lower than 35 ℃, the surface energy of the pearl powder particles is reduced, the kinetic energy of the particles is insufficient, the collision probability is greatly reduced, and the crushing efficiency is reduced.
Further, in the step of crushing pearls to obtain pearl powder, the pearls are crushed to the granularity smaller than 325 meshes. When the high-pressure dispersion liquid is directly adopted to crush pearl particles, because the pearl particles have larger particle size and too large load during crushing, the pearl particles need to be coarsely crushed so as to improve the crushing efficiency of the high-pressure dispersion liquid and reduce the load in the crushing chamber 1, and the pearls are crushed to the particle size of less than 325 meshes during coarse crushing, so that the crushing efficiency of the follow-up high-pressure dispersion liquid on the pearl powder is improved.
In addition, the invention also provides the nano pearl powder slurry prepared by the preparation process of the nano pearl powder slurry. The nano pearl powder slurry contains nano pearl powder, ethanol, ethylene glycol, propylene glycol and glycerol, the components of the slurry are pure, the using effect of the pearl powder is not influenced, the production process is simple and easy to operate, the production cost is low, and the popularization and the use are easy.
To better illustrate the beneficial effects of the embodiments of the present invention, the present invention performed the following comparative experiments: the incident angle alpha formed by the incident direction of the high-pressure dispersion and the tangent line at the incident port 2 of the crushing chamber 1 is changed, the rest parameters are kept unchanged, and the performance detection parameters of each embodiment are shown in the following table:
| angle of incidence alpha/° | Particle size/nm of pearl powder | Standard deviation of particle size distribution | |
| Example 1 | 33 | ≦52 | 7.6 |
| Example 2 | 40 | ≦55 | 8.1 |
| Example 3 | 90 | ≦105 | 33 |
| Example 4 | 10 | ≦78 | 24 |
As can be seen from the above table, when the incident angle α is 30-40 °, the particle size of the pearl powder is small and the distribution is uniform, and the pulverization efficiency is high, and when the incident angle α is not in this range, the pulverization efficiency of the pearl powder is relatively reduced, but is still maintained below 120nm, so that the pearl powder achieves the nano-grade pulverization effect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A preparation process of nano pearl powder slurry is characterized by comprising the following steps:
crushing Margarita to obtain Margarita powder;
continuously pressing the pearl powder into a crushing chamber by using high-pressure dispersion liquid, wherein the high-pressure dispersion liquid performs vortex rotation motion in the crushing chamber, the pearl powder is further crushed by mutual collision and collision between the pearl powder and the inner wall of the crushing chamber when the pearl powder moves along the periphery of a vortex, a discharge port with a filter screen is arranged at the top end of the crushing chamber, and the pearl powder which reaches a preset particle size after being crushed moves to a vortex center and is discharged through the discharge port to obtain nano pearl powder slurry;
an incident angle alpha is formed between the incident direction of the high-pressure dispersion liquid and a tangent line at the incident opening of the crushing chamber, and the incident angle alpha is 30-40 degrees;
the pressure of the high-pressure dispersion liquid is greater than 10MPa, the aperture of the filter screen is less than 120nm, and the preset particle size is consistent with the aperture of the filter screen;
the high-pressure dispersion liquid comprises the following components in percentage by mass: 86 to 93 percent of ultrapure water, 2.38 to 3.5 percent of ethanol, 1 to 4 percent of ethylene glycol, 0.5 to 1.6 percent of propylene glycol and 1.3 to 5 percent of glycerol.
2. The process for preparing nano pearl powder slurry according to claim 1, wherein a liquid inlet is formed in a side wall of the pulverizing chamber, the high pressure dispersion liquid is continuously pumped into the liquid inlet, and an incident angle of the high pressure dispersion liquid is consistent with a vortex rotation direction.
3. The preparation process of the nano pearl powder slurry according to claim 2, wherein the mass ratio of the pearl powder to the high-pressure dispersion liquid is 15-25%.
4. The process for preparing nano pearl powder slurry according to claim 1, wherein in the step of continuously pressing the pearl powder into the pulverizing chamber with the high-pressure dispersion liquid, the pearl powder is pressed once every 2 to 3 hours.
5. The process for preparing nano pearl powder slurry according to claim 2, wherein the temperature of the high pressure dispersion is 35 to 50 ℃.
6. The process for preparing the nano pearl powder slurry according to claim 1, wherein in the step of crushing pearls to obtain pearl powder, the pearls are crushed to have a particle size of less than 325 meshes.
7. A nano pearl powder slurry prepared by the process for preparing nano pearl powder slurry according to any one of claims 1 to 6.
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| CN104161773A (en) * | 2013-05-16 | 2014-11-26 | 北海市弘健科技发展有限公司 | Preparation method of fully active component nano pearl powder |
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| US7300005B2 (en) * | 2004-10-13 | 2007-11-27 | U.S. Greenfiber, Llc | Single motor blower |
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| CN104161773A (en) * | 2013-05-16 | 2014-11-26 | 北海市弘健科技发展有限公司 | Preparation method of fully active component nano pearl powder |
| CN206356108U (en) * | 2016-12-28 | 2017-07-28 | 贵安新区瑞诚生物工程有限公司 | Microfluidizer and nano particle production equipment |
| CN109172608A (en) * | 2018-07-10 | 2019-01-11 | 河北王清任科技股份有限公司 | A kind of preparation method and applications of Nano pearl powder |
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