Spray nozzle and drying device for rubber powder preparation
阅读说明：本技术 一种胶粉制备用喷雾喷头及干燥装置 (Spray nozzle and drying device for rubber powder preparation ) 是由 张伟 张茂松 王泰东 于 2020-05-21 设计创作，主要内容包括：一种胶粉制备用喷雾喷头及干燥装置,包括用于将热气体以及液体进行导入的导流部,导流部与一混合部相连；所述混合部包括支座,在支座内设有一混合机构,所述导流部与混合部配合设置使得热气体处在混合机构的侧部,使得液体处在混合机构的中部。本申请采用配合设置的混合部和导流部,并设置混合机构,使得在将胶粉液体充分搅拌均匀的同时,还能够将热气体与液体进行充分的混合,从而为在喷雾干燥的过程中进行改性提供结构基础。(A spray nozzle and a drying device for preparing rubber powder comprise a flow guide part for guiding hot gas and liquid, wherein the flow guide part is connected with a mixing part; the mixing part comprises a support, a mixing mechanism is arranged in the support, and the guide part and the mixing part are matched to enable hot gas to be located on the side part of the mixing mechanism, so that liquid is located in the middle of the mixing mechanism. This application adopts the mixing portion and the water conservancy diversion portion that the cooperation set up to set up mixing mechanism, make when the rubber powder liquid intensive mixing is even, can also carry out abundant mixing with hot gas and liquid, thereby provide the structure basis for modifying at spray drying's in-process.)
1. The utility model provides a glue powder preparation is with spraying shower nozzle which characterized in that: comprises a flow guide part for guiding hot gas and liquid, wherein the flow guide part is connected with a mixing part; the mixing part comprises a support, a mixing mechanism is arranged in the support, and the guide part and the mixing part are matched to enable hot gas to be located on the side part of the mixing mechanism, so that liquid is located in the middle of the mixing mechanism.
2. The spray nozzle for preparing the rubber powder as claimed in claim 1, wherein: the mixing mechanism comprises a mixing main body, a rotating shaft is arranged at the bottom of the mixing main body, one end of the rotating shaft is fixedly arranged on the support, the other end of the rotating shaft is movably connected with the mixing main body, and a rotating assembly is arranged on the side part of the mixing main body.
3. The spray nozzle for preparing the rubber powder as claimed in claim 2, wherein: the rotating assembly comprises a supporting plate which is obliquely arranged, the supporting plate protrudes out of the mixing main body, an arc-shaped plate is arranged on the side portion of the supporting plate, the bottom of the arc-shaped plate is fixedly connected with the mixing main body, and a side plate of the arc-shaped plate is fixedly connected with the transverse plate.
4. The spray nozzle for preparing the rubber powder as claimed in claim 1, wherein: the flow guide part comprises a liquid flow guide cavity arranged in the middle, and a transverse liquid cavity is arranged on the side part of the liquid flow guide cavity; the side part of the liquid diversion cavity is also provided with a gas flowing cavity.
5. The spray nozzle for preparing the rubber powder as claimed in claim 4, wherein: the mixing portion further comprises a liquid pipeline which is connected with the liquid guide cavity in an abutting mode, an annular bulge is arranged on the liquid pipeline, one end of the liquid pipeline is inserted into the liquid guide cavity, the other end of the liquid pipeline is inserted into the connecting ring, a compression spring is arranged between the connecting ring and the annular bulge, the connecting ring is connected with the rotational flow component in an abutting mode, the spray head is further included, and the rotational component and the connecting ring are embedded into the spray head.
6. The spray nozzle for preparing the rubber powder as claimed in claim 5, wherein: the shower nozzle inserts in the support, the support cup joints with water conservancy diversion portion joint or screw thread.
7. A spray drying apparatus using the spray head of any one of claims 1 to 6, characterized in that: the device comprises a rotatable drying shell, a rubber powder outlet is arranged below the rotatable drying shell, a feeding distribution device is arranged above the rotatable drying shell, a spraying nozzle is arranged below the feeding distribution device, a liquid feeding pipe is arranged on the side part of the feeding distribution device, and a hot gas feeding pipe is arranged at the top of the feeding distribution device.
8. A spray drying apparatus according to claim 7, wherein: the temperature of the hot gas is 140-160 ℃ nitrogen or helium.
9. A spray drying apparatus according to claim 7, wherein: the hot gas contains 0.5 wt% -0.8 wt% of acrylic acid by mass fraction.
10. A spray drying apparatus according to claim 7, wherein: the liquid comprises the following components in parts by mass: vinyl acetate-ethylene copolymer: 40-50 parts; talc powder: 5-10 parts; polyvinyl alcohol: 1-3 parts.
Technical Field
The application relates to a spray nozzle and drying device for preparing rubber powder.
Background
The re-dispersible emulsion powder is water-soluble re-dispersible powder, which is divided into ethylene/vinyl acetate copolymer, vinyl acetate/vinyl versatate copolymer, acrylic acid copolymer and the like, and is prepared into a powder adhesive after spray drying. The powder can be quickly redispersed into emulsion after contacting with water, and the redispersible emulsion powder has high binding capacity and unique performance. In the process of preparing the rubber powder, how to obtain the rubber powder with stable properties is crucial, but the existing atomization system is generally in a universal form, and spray drying is used as a drying process, and in the process, the performance of the rubber powder after rehydration can be basically reduced.
Disclosure of Invention
In order to solve the above problems, the present application provides a spray nozzle for preparing a gelatin powder, including a flow guide part for guiding hot gas and liquid, the flow guide part being connected to a mixing part; the mixing part comprises a support, a mixing mechanism is arranged in the support, and the guide part and the mixing part are matched to enable hot gas to be located on the side part of the mixing mechanism, so that liquid is located in the middle of the mixing mechanism. This application adopts the mixing portion and the water conservancy diversion portion that the cooperation set up to set up mixing mechanism, make when the rubber powder liquid intensive mixing is even, can also carry out abundant mixing with hot gas and liquid, thereby provide the structure basis for modifying at spray drying's in-process.
Preferably, the mixing mechanism comprises a mixing main body, a rotating shaft is arranged at the bottom of the mixing main body, one end of the rotating shaft is fixedly arranged on the support, the other end of the rotating shaft is movably connected with the mixing main body, and a rotating assembly is arranged on the side part of the mixing main body.
Preferably, the rotating assembly comprises a supporting plate which is obliquely arranged, the supporting plate protrudes out of the mixing main body, an arc-shaped plate is arranged on the side portion of the supporting plate, the bottom of the arc-shaped plate is fixedly connected with the mixing main body, and the side plate of the arc-shaped plate is fixedly connected with the transverse plate. The utility model provides a mixing mechanism is self-driven, realizes its three-dimensional structure configuration through arc and diaphragm to arc and diaphragm accept the effect of hot gas, make wholly can drive under the effect of hot gas, shear dispersion operation to fluid, improve dispersion efficiency and dispersion effect.
Preferably, the flow guide part comprises a liquid flow guide cavity arranged in the middle, and a transverse liquid cavity is arranged on the side part of the liquid flow guide cavity; the side part of the liquid diversion cavity is also provided with a gas flowing cavity.
Preferably, the mixing portion still includes the liquid pipeline with liquid water conservancy diversion chamber butt setting, be equipped with cyclic annular arch on the liquid pipeline, the liquid water conservancy diversion intracavity is inserted to the one end of liquid pipeline, and the other end of liquid pipeline is inserted in the link, is equipped with compression spring between link and cyclic annular arch, the link sets up with whirl subassembly butt, still includes a shower nozzle, rotating assembly and link are embedded into in the shower nozzle.
Preferably, the spray head is inserted into the support, and the support is clamped with the flow guide part or sleeved with the flow guide part in a threaded manner.
On the other hand, the application discloses spray drying device, including rotatable dry casing, be equipped with the rubber powder export in the below of rotatable dry casing, be equipped with a feeding distributor in the top of rotatable dry casing, be equipped with the spraying nozzle in feeding distributor below, feeding distributor's lateral part is equipped with the liquid inlet pipe, feeding distributor's top is equipped with the hot gas inlet pipe.
Preferably, the temperature of the hot gas is 140-160 ℃ nitrogen or helium.
Preferably, the hot gas contains 0.5 wt% to 0.8 wt% of acrylic acid by mass fraction. The adhesive powder is subjected to secondary protection on the premise of polyvinyl alcohol protection, and a substance subjected to secondary protection is placed in hot gas, so that the adhesive property of the adhesive powder after redispersion is improved.
Preferably, the liquid comprises the following components in parts by mass: vinyl acetate-ethylene copolymer: 40-50 parts; talc powder: 5-10 parts; polyvinyl alcohol: 1-3 parts.
This application can bring following beneficial effect:
1. the mixing mechanism is arranged, so that the hot gas and the liquid can be fully mixed while the rubber powder liquid is fully and uniformly stirred, and a structural basis is provided for modification in the spray drying process;
2. the mixing mechanism is of a self-driving type, and the three-dimensional structural configuration of the mixing mechanism is realized through the arc-shaped plate and the transverse plate, so that the arc-shaped plate and the transverse plate receive the action of hot gas, the whole mixing mechanism can be driven under the action of the hot gas, the fluid is sheared and dispersed, and the dispersion efficiency and the dispersion effect are improved;
3. the adhesive powder is subjected to secondary protection on the premise of polyvinyl alcohol protection, and a substance subjected to secondary protection is placed in hot gas, so that the adhesive property of the adhesive powder after redispersion is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of a spray head;
FIG. 2 is a schematic view of a flow guide portion;
FIG. 3 is a partial component schematic view of the mixing section;
FIG. 4 is a schematic structural view of a nozzle;
FIG. 5 is a schematic structural view of a base;
FIG. 6 is a schematic view of a mixing mechanism;
FIG. 7 is a side view of FIG. 6;
fig. 8 is a schematic view of a spray drying apparatus.
Detailed Description
In order to clearly explain the technical features of the present invention, the present application will be explained in detail by the following embodiments in combination with the accompanying drawings.
As shown in the drawings, the following detailed description is given by way of example in order to more clearly explain the overall concept of the present application.
In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In a first embodiment, as shown in fig. 1 to 7, a spray nozzle for preparing a gelatin powder comprises a guide part 1 for introducing hot gas and liquid, the guide part 1 being connected to a mixing part 2; the mixing part 2 comprises a
In a second embodiment, as shown in fig. 8, the present application discloses a spray drying device, which comprises a rotatable drying shell 18, a glue powder outlet 19 is arranged below the rotatable drying shell 18, a feeding distribution device 22 is arranged above the rotatable drying shell 18, a spray nozzle 17 is arranged below the feeding distribution device 22, a liquid feeding pipe 20 is arranged at the side part of the feeding distribution device, and a hot gas feeding pipe 21 is arranged at the top part of the feeding distribution device 22.
In a third example, with reference to the experimental procedure of example 1 of CN110684306A, the preparation method is as follows:
(1) dissolving polyvinyl alcohol powder in water in a dissolving kettle to prepare a polyvinyl alcohol water solution with the solid content of 20 percent as a protective colloid;
(2) fully stirring and mixing the protective colloid and the EVA emulsion to prepare spray liquid with the solid content of 50 percent;
(3) pumping the spray liquid into a spray drying tower for spray drying, and adding talcum powder at the top of the tower while spray drying; in the spray drying process, the rotating speed of the rotary atomizer was 13500 rpm, the inlet air temperature of the spray drying tower was the first temperature, the inlet air was nitrogen, and the acrylic acid content was as shown in table 1, and then the adhesive strength was measured.
Therefore, the acrylic acid has better protection effect after being incorporated, and the bonding strength is improved to a certain extent.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
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