Preparation method and equipment for processing energy storage and temperature regulation phase change material

Abstract

The invention relates to the technical field of energy storage material processing, in particular to a preparation method and equipment for processing an energy storage and temperature regulation phase change material, silica sol and paraffin are used as raw materials, a surfactant is used as a paraffin dispersion liquid, and absolute ethyl alcohol is used as an auxiliary dispersing agent, so that molten paraffin is better dispersed, and the energy storage and temperature regulation phase change material is prepared. According to the energy-storage temperature-regulation phase-change material and the preparation method thereof, micro-emulsion liquid drops in a uniform state are formed, so that the uniformity of the heat storage property of the prepared microcapsules is improved, the performance of the obtained energy-storage temperature-regulation phase-change material is more stable in the using process, the actual application requirements can be met, and a pH value regulation method is adopted, so that the method that a precipitator needs to be added in the conventional preparation process is omitted, and the energy-storage temperature-regulation phase-change material is more environment-friendly. On one hand, the operation steps are reduced, the production cost is reduced, on the other hand, the pollution of a traditional precipitator to the microcapsule generation process is reduced, and the heat transfer property and the capsule wall strength are prevented from being reduced due to the fact that the precipitator is attached to the outer surface of the capsule wall.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage material processing, and in particular to a preparation method and equipment for processing energy storage temperature regulating phase change material. Background Art

[0002] Phase change energy storage materials can store temporarily unused energy and release it when needed, thereby alleviating the contradiction between energy supply and demand and saving energy. They are widely used in construction, air conditioning energy saving, solar energy, aerospace, electricity and other fields. Existing phase change energy storage materials are usually prepared from a single raw material, and phase change materials prepared from a single raw material have unstable performance during use and cannot meet the needs of practical applications.

[0003] Prior art CN101333432A discloses a method for preparing a paraffin composite phase-change energy storage material shaped by silica sol. The method uses silica sol and paraffin as raw materials. During preparation, paraffin-like substances are first added to the silica sol, and then necessary additives are added, the mixing system is heated, and the system is quickly stirred to form an emulsion. Then, a pH regulator and a precipitant are added, and the pH value is between 6 and 9. The mixture of paraffin and silicic acid is allowed to precipitate from the system, and a paraffin-like shaped composite phase-change energy storage material shaped by silica sol can be obtained. The phase-change energy storage material has stable performance during use and can meet the needs of practical applications.

[0004] However, in the above-mentioned preparation method of phase change energy storage material, the surfactant is simply used as the paraffin dispersion liquid, and its dispersion effect is not ideal, which easily causes the wax content of the coated microcapsules to be uneven. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation method and equipment for energy storage temperature regulating phase change material processing, which solves the technical problem that the existing preparation method of phase change energy storage material simply uses surfactant as paraffin dispersion liquid, the dispersion effect is not ideal, and it is easy to cause uneven wax content in the coated microcapsules.

[0006] To achieve the above object, the present invention provides a method for preparing an energy storage temperature regulating phase change material, comprising the following steps: Selecting high-purity silicon dioxide raw materials, and using the silicon dioxide raw materials to prepare silica sol; Pour the prepared silica sol into a reaction tank, and add paraffin, surfactant and anhydrous ethanol into the silica sol according to a specific ratio; The reaction tank is heated to melt the silica sol, the paraffin, the surfactant and the anhydrous ethanol in the reaction tank; While the reaction tank is heated, the reaction tank is stirred at a high speed to allow the silica sol, the paraffin, the surfactant and the anhydrous ethanol to be fully mixed; During the stirring process, a pH adjuster is added into the reaction tank to adjust the pH value in the reaction tank to 10.0-12.0 to obtain the desired solution; After the mixing is completed, the solution in the reaction tank is cooled and solidified rapidly, and after solidification, the solidified material is crushed, screened and processed in sequence to obtain the required energy storage temperature regulating phase change material.

[0007] Wherein, the content of the silica raw material in the silica sol prepared using the silica raw material is 30wt%-60wt%.

[0008] Wherein, the content of the silica sol in the reaction tank is 30-45 parts, the content of the paraffin is 50-100 parts, the content of the surfactant is 1-10 parts, and the content of the anhydrous ethanol is 20-50 parts.

[0009] Wherein, the melting temperature of the silica sol, the paraffin, the surfactant and the anhydrous ethanol in the reaction tank is higher than the melting point of the paraffin.

[0010] Among them, after the mixing is completed, the solution in the reaction tank is allowed to cool and solidify rapidly, and after solidification, the solidified material is crushed, screened and processed in sequence to obtain the required energy storage temperature regulating phase change material in the specific manner of: After the mixing is completed, the solution in the reaction tank is cooled rapidly to allow the solution to solidify rapidly to obtain a solid material; After solidification, the solidified material is placed in a pulverizer to be pulverized to obtain granules; After the material is crushed, a screening machine is used to screen the granular matter obtained by the crushing to obtain the granular matter with uniform particle size; After screening, the particles with uniform particle size are processed and formed by a processing and forming machine to obtain the required energy storage temperature regulating phase change material.

[0011] The method for processing and shaping the obtained particles with uniform particle size includes pressing, extrusion and injection molding, and after pressing, extrusion and injection molding, a preservative is coated on the surface of the particles.

[0012] The present invention also provides a preparation device for processing energy storage temperature regulating phase change materials, comprising a reaction tank, a crusher, a screening machine and a processing and forming machine, wherein the reaction tank, the crusher, the screening machine and the processing and forming machine are placed in sequence; The reaction tank is used to melt the raw materials, stir and mix the raw materials thoroughly, and solidify them after mixing to obtain the desired material; The pulverizer is used to pulverize the solidified material to obtain the desired particles; The screening machine is used to screen the pulverized particles to obtain particles with uniform particle size; The processing and forming machine is used to process and form the obtained particles with uniform particle size to obtain the required energy storage and temperature regulating phase change material.

[0013] The invention discloses a preparation method and equipment for processing an energy storage temperature regulating phase change material. By using silica sol and paraffin as raw materials, using a surfactant as a paraffin dispersion liquid, and using anhydrous ethanol as a dispersant, the molten paraffin is better dispersed to form microemulsion droplets with a uniform state, thereby improving the uniformity of the heat storage properties of the prepared microcapsules, making the performance of the obtained energy storage temperature regulating phase change material more stable. By using a pH value adjustment method, the method of adding a precipitant in the previous preparation process is omitted, which reduces the operation steps and production costs on the one hand, and reduces the pollution of the traditional precipitant in the microcapsule generation process on the other hand, and prevents the heat transfer properties and capsule wall strength from decreasing due to the attachment of the precipitant to the surface of the capsule wall. The invention solves the technical problem that the existing preparation method of phase change energy storage material simply uses a surfactant as a paraffin dispersion liquid, the dispersion effect is not ideal, and the wax content of the coated microcapsules is easily uneven. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a flow chart of the preparation method of the energy storage temperature regulating phase change material processing according to the first embodiment of the present invention.

[0016] Figure 2 This is a specific flow chart of the first embodiment of the present invention, in which the solidified material is crushed, screened and processed in sequence to obtain the required energy storage temperature regulating phase change material.

[0017] Figure 3 It is a schematic diagram of the overall structure of the preparation equipment for energy storage temperature regulating phase change material processing according to the second embodiment of the present invention.

[0018] In the figure: 101-reaction tank, 102-crusher, 103-screening machine, 104-processing and forming machine. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0021] First embodiment: See also Figure 1 and Figure 2 The present invention provides a method for preparing an energy storage temperature regulating phase change material, comprising the following steps: S1. Select high-purity silicon dioxide raw material and use the silicon dioxide raw material to prepare silica sol.

[0022] Specifically, a high-purity silica raw material is selected and used to prepare silica sol, wherein the content of the silica raw material in the silica sol prepared using the silica raw material is 30wt%-60wt%.

[0023] S2. Pour the prepared silica sol into the reaction tank 101, and add paraffin, surfactant and anhydrous ethanol into the silica sol according to a specific ratio.

[0024] Specifically, the prepared silica sol is poured into the reaction tank 101, and paraffin, surfactant and anhydrous ethanol are added to the silica sol in a specific ratio, wherein the content of the silica sol in the reaction tank 101 is 30-45 parts, the content of the paraffin is 50-100 parts, the content of the surfactant is 1-10 parts, the content of the anhydrous ethanol is 20-50 parts, and the surfactant is one or more of polyethylene glycol, sucrose ester, polysorbate, octadecylbenzenesulfonic acid, sodium dodecyl sulfate, sodium tetradecyl sulfate, and sodium hexadecyl sulfate.

[0025] S3, heating the reaction tank 101 to melt the silica sol, the paraffin, the surfactant and the anhydrous ethanol in the reaction tank 101.

[0026] Specifically, the reaction tank 101 is heated to melt the silica sol, the paraffin wax, the surfactant and the anhydrous ethanol in the reaction tank 101, wherein the melting temperature of the silica sol, the paraffin wax, the surfactant and the anhydrous ethanol in the reaction tank 101 is higher than the melting point of the paraffin wax.

[0027] S4. While the reaction tank 101 is heated, the reaction tank 101 is stirred at a high speed to allow the silica sol, the paraffin, the surfactant and the anhydrous ethanol to be fully mixed.

[0028] Specifically, while the reaction tank 101 is heated, a spiral stirring rod is used to stir the silica sol, the paraffin wax, the surfactant and the anhydrous ethanol in the reaction tank 101 at a high speed to allow the silica sol, the paraffin wax, the surfactant and the anhydrous ethanol to be fully and evenly mixed.

[0029] S5. During the stirring process, a pH adjuster is added into the reaction tank 101 to adjust the pH value in the reaction tank 101 to 10.0-12.0 to obtain a desired solution.

[0030] Specifically, during the stirring process, a pH adjuster is added into the reaction tank 101 to adjust the pH value in the reaction tank 101 to 10.0-12.0 to obtain a desired solution, wherein the pH adjuster is one or more of NaOH, KOH, sodium methoxide, and ammonia water.

[0031] S6. After the mixing is completed, the solution in the reaction tank 101 is cooled and solidified quickly, and after solidification, the solidified material is crushed, screened and processed in sequence to obtain the required energy storage temperature regulating phase change material.

[0032] Specifically, after the mixing is completed, the solution in the reaction tank 101 is cooled and solidified quickly, and after solidification, the solidified material is crushed, screened and processed in sequence to obtain the required energy storage temperature regulating phase change material in the following specific manner: S61, after the mixing is completed, the solution in the reaction tank 101 is cooled rapidly to allow the solution to solidify rapidly to obtain a solid material; S62, after solidification, putting the solidified material into a pulverizer 102, so that the material is pulverized to obtain granules; S63, after the material is crushed, the granular matter obtained by crushing is screened by a screening machine 103 to obtain granular matter with uniform particle size; S64, after screening, the particles of uniform particle size are processed and formed by a processing and forming machine 104 to obtain the required energy storage temperature regulating phase change material.

[0033] Specifically, the method for processing and shaping the obtained particles with uniform particle size includes pressing, extrusion and injection molding, and after pressing, extrusion and injection molding, coating the surface of the particles with a preservative.

[0034] When using the preparation method of energy storage temperature regulating phase change material processing of the present embodiment, by using silica sol and paraffin as raw materials, using surfactant as paraffin dispersion liquid, and using anhydrous ethanol as a dispersant, it is beneficial to better disperse the molten paraffin and form microemulsion droplets with uniform state, thereby improving the uniformity of the heat storage properties of the prepared microcapsules, making the performance of the obtained energy storage temperature regulating phase change material more stable. By adopting the pH value adjustment method, the practice of adding precipitants in the previous preparation process is eliminated. On the one hand, the operation steps are reduced and the production cost is reduced. On the other hand, the pollution of the traditional precipitant in the microcapsule generation process is reduced, and the heat transfer properties and capsule wall strength are prevented from decreasing due to the attachment of the precipitant to the surface of the capsule wall. The technical problem that the existing preparation method of phase change energy storage material simply uses surfactant as paraffin dispersion liquid, the dispersion effect is not ideal, and it is easy to cause uneven wax content in the coated microcapsules is solved.

[0035] Second embodiment: Based on the first embodiment, please refer to Figure 3 The present invention also provides a preparation device for energy storage temperature regulating phase change material processing, including a reaction tank 101, a crusher 102, a screening machine 103 and a processing and forming machine 104.

[0036] In this embodiment, the required energy storage and temperature regulating phase change material can be prepared by the coordinated use of the reaction tank 101, the crusher 102, the screening machine 103 and the processing and forming machine 104. At the same time, the prepared energy storage and temperature regulating phase change material has stable performance during use and can meet the needs of practical applications.

[0037] Among them, the reaction tank 101, the crusher 102, the screening machine 103 and the processing and forming machine 104 are placed in sequence; the reaction tank 101 is used to melt the raw materials, allow the raw materials to be fully stirred and mixed, and after mixing, solidify to obtain the required material; the crusher 102 is used to crush the solidified material to obtain the required particles; the screening machine 103 is used to screen the crushed particles to obtain particles with uniform particle size; the processing and forming machine 104 is used to process and form the particles with uniform particle size to obtain the required energy storage temperature regulating phase change material.

[0038] When using the energy storage and temperature regulating phase change material processing and preparation equipment of the present embodiment, the required energy storage and temperature regulating phase change material can be prepared by the coordinated use of the reaction tank 101, the crusher 102, the screening machine 103 and the processing and forming machine 104, so that the prepared energy storage and temperature regulating phase change material has stable performance during use and can meet the needs of practical applications. At the same time, by using silica sol and paraffin as raw materials, using a surfactant as a paraffin dispersion liquid, and using anhydrous ethanol as a dispersant, it is beneficial to better disperse the molten paraffin and form uniform microemulsion droplets, thereby improving the uniformity of the heat storage properties of the prepared microcapsules, so that the performance of the obtained energy storage and temperature regulating phase change material is more stable and can meet the needs of practical applications.

[0039] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A method for preparing energy storage temperature regulating phase change material processing, characterized in that: The following steps are involved: Selecting high-purity silicon dioxide raw materials, and using the silicon dioxide raw materials to prepare silica sol; Pour the prepared silica sol into a reaction tank, and add paraffin, surfactant and anhydrous ethanol into the silica sol according to a specific ratio; The reaction tank is heated to melt the silica sol, the paraffin, the surfactant and the anhydrous ethanol in the reaction tank; While the reaction tank is heated, the reaction tank is stirred at a high speed to allow the silica sol, the paraffin, the surfactant and the anhydrous ethanol to be fully mixed; During the stirring process, a pH adjuster is added into the reaction tank to adjust the pH value in the reaction tank to 10.0-12.0 to obtain the desired solution; After the mixing is completed, the solution in the reaction tank is allowed to cool and solidify rapidly, and after solidification, the solidified material is crushed, screened and processed into a shape in sequence to obtain the required energy storage temperature regulating phase change material.

2. The method for preparing the energy storage temperature regulating phase change material according to claim 1, characterized in that: The silica sol prepared using the silica raw material has a content of 30wt%-60wt% of the silica raw material.

3. The method for preparing the energy storage temperature regulating phase change material according to claim 1, characterized in that: The content of the silica sol in the reaction tank is 30-45 parts, the content of the paraffin is 50-100 parts, the content of the surfactant is 1-10 parts, and the content of the anhydrous ethanol is 20-50 parts.

4. The method for preparing the energy storage temperature regulating phase change material according to claim 1, characterized in that: The melting temperature of the silica sol, the paraffin, the surfactant and the anhydrous ethanol in the reaction tank is higher than the melting point of the paraffin.

5. The method for preparing the energy storage temperature regulating phase change material according to claim 1, characterized in that: After the mixing is completed, the solution in the reaction tank is cooled and solidified quickly, and after solidification, the solidified material is crushed, screened and processed in sequence to obtain the required energy storage temperature regulating phase change material in the following specific manner: After the mixing is completed, the solution in the reaction tank is cooled rapidly to allow the solution to solidify rapidly to obtain a solid material; After solidification, the solidified material is placed in a pulverizer to be pulverized to obtain granules; After the material is crushed, a screening machine is used to screen the granular matter obtained by the crushing to obtain the granular matter with uniform particle size; After screening, the particles with uniform particle size are processed and formed by a processing and forming machine to obtain the required energy storage temperature regulating phase change material.

6. The method for preparing the energy storage temperature regulating phase change material according to claim 5, characterized in that: The method for processing and shaping the obtained particles with uniform particle size comprises pressing, extrusion and injection molding, and after pressing, extrusion and injection molding, a preservative is coated on the surface of the particles.

7. A preparation device for energy storage temperature regulating phase change material processing, applied to the preparation method for energy storage temperature regulating phase change material processing according to any one of claims 1 to 6, characterized in that: It includes a reaction tank, a crusher, a screening machine and a processing and forming machine, wherein the reaction tank, the crusher, the screening machine and the processing and forming machine are placed in sequence; The reaction tank is used to melt the raw materials, stir and mix the raw materials thoroughly, and solidify them after mixing to obtain the desired material; The pulverizer is used to pulverize the solidified material to obtain the desired particles; The screening machine is used to screen the pulverized particles to obtain particles with uniform particle size; The processing and forming machine is used to process and form the obtained particles with uniform particle size to obtain the required energy storage and temperature regulating phase change material.

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