CN109876734B - Core-shell spherical liquid drop preparation device and core-shell spherical liquid drop preparation method - Google Patents

Abstract

The invention relates to a core-shell spherical droplet preparation device and a core-shell spherical droplet preparation method, wherein the core-shell spherical droplet preparation device comprises several liquid storage bins, spray heads and driving parts; The liquid to be prepared; the nozzle includes several coaxial infusion pipes, and each infusion pipe is connected with the corresponding liquid storage tank to form multi-layer coated spherical droplets; the driving part is used to control the flow of the liquid to be prepared in each infusion pipe. flow speed. The core-shell spherical droplet preparation device and the core-shell spherical droplet preparation method can prepare a core-shell spherical droplet product coated with a multi-layered core, and the thickness of each layer can be adjusted as required to achieve taste adjustment.

Description

Core-shell spherical droplet preparation device and core-shell spherical droplet preparation method

technical field

The invention relates to the technical field of liquid coating, in particular to a core-shell spherical droplet preparation device and a core-shell spherical droplet preparation method.

Background technique

With the increasing market demand for healthy and nutritious food products, the demand for active ingredient wraps for food and beverages globally is also growing dramatically. The granulation process can be used to encapsulate the active ingredients of the paste, but the granulation process cannot encapsulate the liquid food and drugs. At present, the commonly used liquid coating technology on the market is the orifice method, that is, the droplet is dropped into the solidified liquid by a dropping device, so as to solidify the surface of the droplet to form a solidified film to cover the internal droplet. Although this method can prepare core-shell spherical droplets, this method can only coat one kind of liquid. For products with multiple mixed flavors, each liquid can only be mixed before coating, and it is inconvenient to adjust the mixed components. The proportions of the ingredients in it affect the taste.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a core-shell spherical droplet preparation device and a core-shell spherical droplet preparation method. The core-shell spherical droplet preparation device and the core-shell spherical droplet preparation method can prepare a core-shell spherical droplet product coated with a multi-layer core, and the thickness of each core layer can be adjusted as required to realize taste adjustment.

A core-shell spherical droplet preparation device, comprising several liquid storage bins, spray heads and driving components;

The plurality of liquid storage bins are used to store the liquids to be prepared;

The nozzle includes several coaxial infusion pipes, and each infusion pipe is communicated with the corresponding liquid storage tank;

The driving component is used to control the flow speed of the liquid to be prepared in each infusion tube.

In one of the embodiments, in any two adjacent infusion tubes, the output tube of the inner infusion tube is protruding from the output tube of the outer infusion tube.

In one embodiment, among the several coaxial infusion tubes, along the direction of the central axis of the infusion tubes, the distance between the output ends of any two adjacent infusion tubes h≤r ₂ -r ₁ , where r ₂ is the radius of the outer infusion tube located on the outer side of the two adjacent infusion tubes, and r ₁ is the radius of the inner layer infusion tube of the two adjacent infusion tubes.

In one embodiment, the core-shell spherical droplet preparation device further includes an optocoupler detector for detecting the particle size of the droplets ejected from the spray head.

In one embodiment, a solidification pool is further included, and the solidification pool is disposed opposite to the spray head for forming a solidified film on the surface of the droplet.

The method for preparing core-shell spherical droplets using the above-mentioned shell-core spherical droplet preparation device includes the following steps:

prepare each liquid to be prepared;

adding the prepared liquids to the corresponding liquid storage tanks;

The driving component is adjusted to control the flow speed of each liquid to be prepared in the infusion tube.

In one of the embodiments, the flow rate of the liquid to be prepared in any two adjacent infusion pipes satisfies the following formula: v ₁ /v ₂ =(R ^3- r ³ )/r ³ , where v ₁ represents the The flow rate of the liquid to be prepared in the outer infusion tube, v ₂ represents the flow rate of the liquid to be prepared in the inner infusion tube, R is the radius of the outer infusion tube, and r is the inner infusion tube. The radius of the inner infusion tube.

In one embodiment, the above-mentioned preparation method further includes the step of adding a solidification liquid to the solidification tank, and the added solidification liquid meets the following requirements:

h≤1.5d, where d represents the diameter of the droplets ejected from the nozzle, and h represents the vertical distance between the end of the output pipe of the innermost infusion pipe of the nozzle and the liquid level of the solidified liquid distance.

In one embodiment, the solidification liquid is a calcium ion solution with a mass percentage content of 0.5%-2%;

The liquid to be prepared in the outermost infusion tube contains a sodium alginate solution with a mass percentage content of 0.5%-2%.

In one embodiment, the absolute viscosity of the liquid to be prepared is greater than or equal to 128 cP.

The above-mentioned core-shell spherical droplet preparation device is provided with several coaxial infusion tube nozzles, and the infusion tube is communicated with the corresponding liquid storage tank, so that a multi-layered core-shell structure can be formed through the action of each infusion tube. droplets. And it is also provided with a driving component to control the flow speed of the liquid in each infusion tube, so as to control the thickness of each layer of the formed core-shell droplets, so as to realize the adjustment of the product structure.

In addition, the above-mentioned core-shell spherical droplet preparation device can prepare spherical particle products without the need for a spherical mold to be inverted, the preparation process is simple, high technical requirements are not required, the production cost is low, and the application value is high.

Description of drawings

1 is a schematic diagram of an apparatus for preparing core-shell spherical droplets according to an embodiment;

In Fig. 2, a is a schematic diagram of a nozzle comprising two infusion tubes and a bottom view thereof, and b is a schematic diagram of a nozzle comprising three coaxial infusion tubes and a bottom view thereof;

FIG. 3 is a schematic diagram of the nozzle of the core-shell spherical droplet preparation device shown in FIG. 1 .

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention will be given. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The core-shell spherical droplet preparation device 10 according to an embodiment of the present invention includes a plurality of liquid storage tanks 101 , a spray head 102 and a driving part 103 . Among them, several liquid storage tanks 101 are used to store the liquids to be prepared. The shape and size of the liquid storage tanks 101 are not particularly limited. Preferably, the liquid storage tanks have the same size, and are arranged in the order of the corresponding layers in the formed core-shell spherical droplets. For example, the core-shell spherical droplet preparation device includes n liquid storage tanks, namely the first liquid storage tank 1011, the second liquid storage tank 1012, the second liquid storage tank 1013...the nth liquid storage tank (not shown), The first storage tank 1011 is used to store the liquid that forms the outer shell structure of the shell-core droplet, the second liquid storage tank 1012 is used to store the liquid that forms the first core layer adjacent to the shell layer, and the third storage liquid The tank 1013 is used to store the liquid forming the second core layer adjacent to the first core layer...the nth liquid storage tank is used to store the liquid of the n-1th core layer of the innermost layer, wherein n is an integer greater than or equal to 2 .

In addition, a first opening and a second opening can be provided on the wall of the liquid storage silo 101, and a pipeline matching the first opening and the second opening can be provided for introducing and exporting the liquid in the liquid storage silo, respectively. . In addition, a liquid level detector can also be set in the liquid storage tank to monitor the liquid level in the liquid storage tank, and a temperature controller can be set to control the temperature of the liquid in the liquid storage tank.

The spray head 102 includes several coaxial infusion tubes, and each infusion tube communicates with the corresponding liquid storage tank 101 . In FIG. 2 a is a schematic diagram of a spray head including two infusion tubes and its bottom view, and b in FIG. 2 is a schematic diagram of a spray head including three coaxial infusion tubes and its bottom view. Since the multiple infusion tubes of the spray head 102 are coaxial, when the liquid flows out of the infusion tube, a core-shell droplet with multiple layers can be formed, and it is only necessary to control the flow speed of the liquid in the infusion tube to realize each layer. Thickness adjustment is convenient and quick. As shown in FIG. 3 , in one embodiment, the spray head 102 includes three coaxial infusion tubes, namely a first infusion tube 1021 , a second infusion tube 1022 and a third infusion tube 1023 , wherein the first infusion tube 1021 is used for conveying For the liquid to be prepared for forming the shell layer, the second infusion tube 1022 is used for transporting the liquid to be prepared for forming the first core layer, and the third infusion tube 1033 is used for the liquid to be prepared for forming the second core layer.

In order to ensure that the formed shell-core spherical droplet has a good multi-layer coating structure, it is preferable that in any two adjacent infusion tubes, the output tubes of the inner infusion tube located in the inner layer protrude from the outer infusion tube. The output tube of the outer infusion tube. More preferably, in several coaxial infusion tubes, along the direction of the central axis of the infusion tubes, the distance between the output ends of any two adjacent infusion tubes h≤r ₂ -r ₁ , where r ₂ is adjacent Among the two infusion tubes, the radius of the outer layer of infusion tubes located outside, r ₁ is the radius of the inner layer of infusion tubes in the two adjacent infusion tubes, so as to facilitate the formation of a concentric core with better sphericity. Shell spherical droplets.

The spray head 102 can be connected in a detachable manner. On the one hand, it is convenient to replace infusion tubes of different diameters according to requirements, and on the other hand, it is convenient for cleaning, so as to prevent the infusion tube from being blocked and the instrument needs to be dismantled as a whole.

In addition, the material for preparing the infusion tube is not particularly limited, and it can be made of stainless steel or rubber resin material. It is preferable to form a layer of coating with the opposite polarity to the liquid to be prepared in the infusion tube to avoid drag caused by liquid adhesion. tail. In one embodiment, the inner wall of the infusion tube has a hydrophobic surface.

The driving component 103 is an instrument for controlling the flow velocity of the liquid in each infusion tube, and its installation position and number are not particularly limited. The driving part 103 can be an electric driving part, which has a control panel for presetting the flow speed of the liquid in each infusion tube.

In addition, the above-mentioned core-shell spherical droplet preparation device may further include a solidification pool 104 , which is disposed opposite to the spray head 102 and used to form a solidified film on the surface of the droplets sprayed from the spray head 102 . The components in the curing bath can be set up according to the curing method chosen. The curing method can be curing liquid curing, light curing, temperature-controlled curing, and the like. In one embodiment, the curing bath contains a curing liquid. In another embodiment, the liquid level of the solidified liquid satisfies the following formula: h≤1.5d, where d represents the diameter of the droplets ejected from the nozzle, and h represents the end of the output pipe of the innermost infusion pipe of the nozzle and the vertical distance between the liquid level of the solidification liquid. The type of the solidified liquid is not particularly limited, and it can be a calcium ion solution such as calcium chloride, calcium lactate, etc., or a polymer such as agarose, gelatin, and chitosan. In one embodiment, the solidification liquid is a calcium ion solution with a mass percentage content of 0.5%-2%. It is only necessary to add a small amount of alginate to the liquid to be prepared, and after the droplets enter the solidified liquid, they can be rapidly solidified, which can effectively prevent the deformation of the droplets due to the resistance of the solution. In addition, other materials or auxiliary materials that need to be wrapped can also be added to the solidifying liquid to meet the needs of various products, which are not particularly limited here.

In addition, the above-mentioned core-shell spherical droplet preparation device 10 may further include an optocoupler detector 105 for detecting properties of the droplets ejected from the spray head 102 , such as the particle size of the droplet, the sphericity of the droplet, and the like. The photocoupler detector can be arranged in the area between the spray head and the curing pool, which is not particularly limited here.

The above-mentioned core-shell spherical droplet preparation device 10 is provided with a nozzle 102 having several coaxial infusion tubes, and the infusion tubes are communicated with the corresponding liquid storage tanks 101, so that the multi-layer coating can be formed by the action of each infusion tube. core-shell structure droplets. In addition, the above-mentioned core-shell spherical droplet preparation device is also provided with a driving component 103 to control the flow speed of the liquid in each infusion tube, thereby controlling the thickness of each layer of the formed core-shell droplets, and realizing product structure and taste adjustment. .

In addition, the above-mentioned core-shell spherical droplet preparation device can form spherical products without the need to pour a spherical mold, the preparation process is simple, no high technical requirements are required, the production cost is low, and the application value is high.

A method for preparing core-shell spherical droplets using the above-mentioned shell-core spherical droplet preparation device according to another embodiment of the present invention includes the following steps:

S101: Prepare each liquid to be prepared.

Each liquid to be prepared can be fruit juice, medicinal liquid, or liquid skin care products, etc., which are not particularly limited here. In order to avoid mutual fusion of the layers in the multi-layer core-shell structure droplet preparation, the liquid to be prepared is preferably a liquid with relatively high viscosity. In one embodiment, the absolute viscosity of the liquid to be prepared is greater than or equal to 128cP, and in another implementation In an example, the absolute viscosity of the liquid to be prepared is greater than or equal to 2000 cP. In addition, it is preferable that the mass percentages of the solutes in the liquids to be prepared in each layer are close to each other. In one embodiment, the difference between the mass percentages of the solutes of the liquids to be prepared in two adjacent layers is 0-5%, so as to reduce the concentration of the solutes. diffusion. In addition, the liquids to be prepared in the two adjacent layers may use solvents with opposite polarities to form a coating structure of oil-in-water or water-in-oil, which is not particularly limited here.

In addition, auxiliary materials such as surfactants can also be added to the liquid to be prepared to adjust the surface tension of the droplets. And the type and addition amount of the liquid to be prepared or its auxiliary materials can be adjusted according to the curing method adopted. In one embodiment, the liquid to be prepared in the outermost infusion tube is seaweed with a mass percentage of 0.5%-2%. Sodium solution, solidification solution is 0.5%-2% calcium ion solution. In this way, a solidified film can be rapidly formed on the outer layer, wrapping the inner multi-layer liquid core layer.

S102: Add each prepared liquid to be prepared into a corresponding liquid storage tank.

It should be noted that the liquid can be directly added to the corresponding liquid storage tank according to the positional relationship of each layer in the shell-core spherical droplet to be formed, or the liquid can be added to the liquid storage tank first, and then formed according to the required liquid storage tank. The position of the liquid storage tank is adjusted by the position of each layer of the core-shell spherical droplet, which is not particularly limited here.

S103: Adjust the driving component to control the flow speed of each liquid to be prepared in the infusion tube.

Due to the different liquid flow rates in the infusion pipes, the thicknesses and shapes of the core-shell droplets formed are different. Preferably, the flow rates of the liquids to be prepared in any two adjacent infusion pipes satisfy the following formula: v ₁ /v ₂ = (R ³ - r ³ )/r ³ , where v ₁ represents the flow rate of the liquid to be prepared in the outer infusion tube located outside, v ₂ represents the flow rate of the liquid to be prepared in the inner infusion tube, R is the radius of the outer infusion tube located at the outer side, and r is the radius of the inner layer infusion tube located at the inner side, so as to ensure that a spherical droplet with a good shape and a uniform core-shell is obtained. In one embodiment, the outermost layer of the infusion tube has a radius of 5mm-8mm. The droplets of the outermost infusion tube within the above range have better sphericity. In one embodiment, the outermost layer of the infusion tube has a radius of 6 mm.

The above-mentioned preparation method of core-shell spherical droplets only needs to adjust the liquid to be prepared in each liquid storage tank as required to realize the preparation of a product coated with a multi-liquid core layer, which can effectively avoid the need to mix various flavor raw materials when preparing mixed flavor products. The above method only needs to adjust the flow speed of each layer to realize the thickness adjustment of each layer in the formed core-shell spherical droplet, and then realize the adjustment of taste, which is convenient and quick, and has high application value.

In addition, the above method also only needs to adjust the curing method or the concentration of the curing liquid to achieve the degree of softness and hardness of the prepared core-shell spherical droplet product, which is especially suitable for the technical fields of food processing and pharmaceutical preparations.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. A method for preparing core-shell spherical droplets coated with a multilayer core by a shell-core spherical droplet preparation device, wherein the core-shell spherical droplet preparation device comprises several liquid storage bins, spray heads and driving components ; wherein, the several liquid storage bins are used to store the liquids to be prepared; the spray head includes several coaxial infusion pipes, and each infusion pipe is communicated with the corresponding liquid storage tank to form a multi-layered coated spherical droplets; the driving component is used to control the flow speed of the liquid to be prepared in each infusion tube; Wherein, in the several coaxial infusion tubes, along the direction of the central axis of the infusion tubes, the distance between the output ends of any two adjacent infusion tubes h≤r ₂ -r ₁ , where r ₂ is the radius of the outer infusion tube located on the outer side of the two adjacent infusion tubes, and r ₁ is the radius of the inner layer infusion tube located in the inner side of the two adjacent infusion tubes; The radius of the infusion tube in the outermost layer is 5mm-8mm; In any two adjacent infusion pipes, the output pipe of the inner layer infusion pipe is protruded from the output pipe of the outer layer infusion pipe located outside; The method for preparing core-shell spherical droplets coated with multilayer cores includes the following steps: prepare each liquid to be prepared; adding the prepared liquids to the corresponding liquid storage tanks; adjusting the driving component to control the flow speed of each liquid to be prepared in the infusion tube; Wherein, the absolute viscosity of the liquid to be prepared is greater than or equal to 128cP, and the difference between the mass percentages of the solutes of the liquid to be prepared in the two adjacent layers is 0-5%; or the liquid to be prepared in the two adjacent layers adopts the opposite polarity solvent; The flow rate of the liquid to be prepared in any two adjacent infusion tubes satisfies the following formula: v ₁ /v ₂ =(R ³ -r ³ )/r ³ , where v ₁ represents the outer infusion tube located outside The flow rate of the liquid to be prepared in the middle, v ₂ represents the flow rate of the liquid to be prepared in the inner infusion pipe, R is the radius of the outer infusion pipe, and r is the radius of the inner infusion pipe. . 2 . The method according to claim 1 , wherein the core-shell spherical droplet preparation device further comprises an optocoupler detector for detecting the particle size of the droplets ejected from the nozzle. 3 . 3 . The method according to claim 1 , further comprising a solidification pool, the solidification pool is disposed opposite to the spray head, and is used to form a solidified film on the surface of the droplet. 4 . 4. method according to claim 3 is characterized in that, also comprises the step of adding solidified liquid in described solidification tank, and the described solidified liquid of adding meets following requirements: h≤1.5d, where d represents the diameter of the droplets ejected from the nozzle, and h represents the vertical distance between the end of the output pipe of the innermost infusion pipe of the nozzle and the liquid level of the solidified liquid distance. 5. The method according to claim 4, wherein the solidified liquid is a calcium ion solution with a mass percentage content of 0.5%-2%; The liquid to be prepared in the outermost infusion tube contains a sodium alginate solution with a mass percentage content of 0.5%-2%. 6. The method according to any one of claims 1-5, wherein the absolute viscosity of the liquid to be prepared is greater than or equal to 2000 cP. 7. A core-shell spherical droplet preparation device for preparing core-shell spherical droplets coated with a multilayer core, characterized in that the core-shell spherical droplet preparation device comprises several liquid storage bins, spray heads and drives Wherein, the several liquid storage bins are used to store the liquids to be prepared; the spray head includes several coaxial infusion pipes, and each infusion pipe is communicated with the corresponding liquid storage tank to form a multi-layered coating spherical droplets; the driving component is used to control the flow speed of the liquid to be prepared in each infusion tube; Wherein, in the several coaxial infusion tubes, along the direction of the central axis of the infusion tubes, the distance between the output ends of any two adjacent infusion tubes h≤r ₂ -r ₁ , where r ₂ is the radius of the outer infusion tube located on the outer side of the two adjacent infusion tubes, and r ₁ is the radius of the inner layer infusion tube located in the inner side of the two adjacent infusion tubes; The radius of the infusion tube in the outermost layer is 5mm-8mm; In any two adjacent infusion pipes, the output pipe of the inner infusion pipe is protruded from the output pipe of the outer infusion pipe. 8 . The device for preparing core-shell spherical droplets according to claim 7 , wherein the nozzles are connected in a detachable manner. 9 . 9 . The device for preparing core-shell spherical droplets according to claim 7 , wherein the device for preparing spherical core-shell droplets further comprises a solidification pool, and the solidification pool is arranged opposite to the spray head to be used in the A cured film is formed on the surface of the droplet. 10 . The core-shell spherical droplet preparation device according to claim 7 , wherein the core-shell spherical droplet preparation device further comprises an optocoupler detector, which is used to detect the droplets ejected from the nozzle. 11 . particle size.

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