Spray drying nozzle for preparing nano composite material

Abstract

The utility model discloses a spray drying spray head for preparing a nano composite material. The spray drying spray head comprises an ultrasonic spray head part and a mixed flow part, the ultrasonic spray head part comprises a spray pipe and a plurality of ultrasonic generation units, a groove is formed in the center of the spray pipe, and the ultrasonic generation units are arranged in the groove of the spray pipe; a spray head part is arranged at the lower part of the spray pipe; the flow mixing part comprises an upper fixed pipe part, a central flow mixing cavity, a lower flow mixing pipe cavity, an air inlet hole and an air inlet pipe; the nozzle part is inserted into the central flow mixing cavity, an air inlet is formed in the area of the central flow mixing cavity, and an air inlet pipe is arranged on the outer side of the air inlet. The utility model provides a spray drying nozzle for preparing a nano composite material, in particular to a spray drying nozzle for preparing a nano composite material, which can realize spray drying of small particles, has the advantages of low drying cost, strong industrialization potential and the like, and can effectively reduce the particle size of the particles through the use of ultrasonic waves and a spiral spray channel in the specific structure. The performance of the finally prepared product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nanometer material preparation technical field, concretely is a kind of spray drying spray head for nanometer composite material preparation. BACKGROUND

[0002] With the attention to health, antibacterial material gets more and more application, and silver-containing nanometer antibacterial material is an important direction, which is currently considered to be applied in many commercial product fields. To further improve its antibacterial performance, further improvement of antibacterial material has been a research focus in the field, and the inventor has published a paper "Simple Synthesis of Silver Nanoparticles Grown in-situ on Graphene Oxide Silver Salt Nanocomposites and Their Antibacterial Performance (English)" in "New Carbon Materials" on this basis. A kind of nanometer silver particle in-situ growth nanocomposite of silver salt of graphene oxide is successfully synthesized by using a simple ultrasonic mixing method. The nanometer structure of the obtained material is studied by scanning electron microscope, transmission electron microscope, X-ray diffractometer and other analytical methods. The results show that graphene oxide not only can capture a large number of positively charged silver ions as a negatively charged macromolecule, but also can reduce silver ions in-situ to nanometer silver particles, so that a hybrid structure containing uniformly dispersed nanometer silver particles and silver ions on the surface of graphene oxide is obtained. This structure makes the prepared nanocomposite material can fully utilize the advantages of silver nanoparticles and graphene oxide silver salt, and shows strong antibacterial activity and long-lasting antibacterial ability to staphylococcus aureus and escherichia coli, which is a kind of efficient antibacterial agent. The synthesis steps of the material are as follows: graphene oxide (GO) is dispersed in deionized water, and ultrasonic treatment is carried out to obtain a uniform suspension. Then, silver nitrate (AgNO3) aqueous solution is added to the GO suspension, and ultrasonic treatment is carried out again. Then, the obtained mixture is fully stirred at 60 DEG C to promote the reaction of silver ions and graphene oxide surface. Finally, through centrifugation, washing and vacuum drying treatment, the final nanocomposite material product is obtained. In the landing attempt of this research result, it is found that the vacuum drying process in the experimental environment has disadvantages in yield and cost in landing, so other drying methods need to be selected.

[0003] Spray drying is a common drying method, but the commonly used spray drying nozzle sprays particles with large size, which is not conducive to the subsequent application of nanometer composite material. SUMMARY

[0004] The utility model aims at providing a kind of spray drying spray head for nanometer composite material preparation to solve the problems in prior art.

[0005] In order to achieve the above object, the technical scheme of the utility model provides a kind of spray drying nozzle for nanocomposite preparation, including ultrasonic nozzle part, mixed flow part;The ultrasonic nozzle part includes spray pipe, several ultrasonic generating units, the central part of the spray pipe is provided with recess, the ultrasonic generating unit is annular, and is arranged in the recess of spray pipe;The lower part of the spray pipe is provided with nozzle part;The mixed flow part includes upper fixed tube part, central mixed flow cavity, lower mixed flow tube cavity, air inlet hole, air inlet pipe;The mixed flow part is rotary structure, and is provided with through hole in the center, wherein the inner diameter of the upper fixed tube part is same with the outer diameter of the spray pipe, and is connected with the spray pipe by bolt structure;The nozzle part is inserted into the central mixed flow cavity, and the central mixed flow cavity region is provided with air inlet hole, and the air inlet pipe is provided outside the air inlet hole.

[0006] Further, the spray pipe side wall on the upper part of the recess is provided with wire slot.

[0007] Further, the nozzle part includes upper spray pipe part, lower spray pipe part, the outer diameter of the upper spray pipe part is less than the outer diameter of the lower part of the spray pipe, the outer diameter of the lower spray pipe part is less than the outer diameter of the upper spray pipe part, and the bottom of the lower spray pipe part is provided with inward chamfer.

[0008] Further, the central mixed flow cavity is arranged in the lower part of the upper fixed tube part, the inner diameter of the upper part of the central mixed flow cavity is same with the outer diameter of the upper spray pipe part, and the height is greater than or equal to the height of the nozzle part;The lower mixed flow tube cavity is arranged in the lower part of the central mixed flow cavity, the outer diameter of the lower mixed flow tube cavity is greater than the outer diameter of the lower spray pipe part and less than the inner diameter of the upper part of the central mixed flow cavity;The lower part of the central mixed flow cavity and the lower mixed flow tube cavity are smoothly transitioned;The air inlet hole is located in the region of the lower spray pipe part;Wire slot is arranged outside the upper fixed tube part for air inlet hole to pass through.

[0009] Further, the nozzle further includes spiral spray channel;The spiral spray channel includes central rod, outer spiral surface, bottom ring, several bottom support plates;The central rod is connected with the bottom ring through several bottom support plates at the bottom, the bottom ring is connected to the bottom of the lower mixed flow tube cavity through thread structure, and the outer diameter of the bottom ring is same with the inner diameter of the lower mixed flow tube cavity.

[0010] Further, the outer diameter of the central rod is 25%-50% of the inner diameter of the lower mixed flow tube cavity.

[0011] Further, the height of the central rod is 50%-80% of the height of the lower mixed flow tube cavity 23, and cross recess is arranged at the bottom of the central rod 31.

[0012] This invention proposes a spray drying nozzle for the preparation of nanocomposite materials, specifically a spray drying nozzle for nanocomposite materials, which can achieve spray drying of small particles and has advantages such as low drying cost and strong industrialization potential. In terms of specific structure, the use of ultrasonic waves and spiral spray channels can effectively reduce particle size and improve the performance of the final prepared product. Attached Figure Description

[0013] Figure 1 This is an exploded view of the overall design of this utility model.

[0014] Figure 2 This is a partial exploded cross-section diagram of the overall scheme of this utility model.

[0015] Figure 3 This is a partially enlarged schematic diagram of this utility model.

[0016] Figure 4 This is a schematic diagram of the partial spiral spray channel of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] As attached Figures 1-4 As shown, the nanocomposite material preparation device involved in this utility model is specifically a spray drying nozzle for nanocomposite material preparation, including an ultrasonic nozzle head 1, a mixing section 2, and a spiral spray channel 3.

[0019] As attached Figures 1-2 As shown, the ultrasonic nozzle 1 includes a nozzle 11 and several ultrasonic generating units 12. Specifically, a groove 111 is provided in the center of the nozzle 11, and the ultrasonic generating units 12 are annular and are disposed in the groove 111 of the nozzle 11. A wire-passing groove 112 is provided on the side wall of the nozzle 11 above the groove 111 for the ultrasonic generating units 12 to pass wires.

[0020] Furthermore, the lower part of the nozzle 11 is provided with a nozzle head 113, which includes an upper nozzle section 1131 and a lower nozzle section 1132. The outer diameter of the upper nozzle section 1131 is smaller than the outer diameter of the lower part of the nozzle 11, and the outer diameter of the lower nozzle section 1132 is smaller than the outer diameter of the upper nozzle section 1131. The bottom of the lower nozzle section 1132 is provided with an inward chamfer. The lower nozzle section 1132 may also be in the shape of an inverted frustum.

[0021] The mixing section 2 includes an upper fixed pipe section 21, a central mixing chamber 22, a lower mixing pipe chamber 23, and an air inlet 24.

[0022] Intake pipe 25.

[0023] The mixing section 2 has a rotary structure with a through hole in the center. The inner diameter of the upper fixed tube section 21 is the same as the outer diameter of the nozzle 11, and it is connected to the nozzle 11 by a bolt structure. The thread structure is not shown in the attached figure.

[0024] A central mixing chamber 22 is provided at the lower part of the upper fixed pipe section 21. The upper inner diameter of the central mixing chamber 22 is the same as the outer diameter of the upper spray pipe section 1131, and its height is greater than or equal to the height of the spray head 113.

[0025] As attached Figure 1 , 2 As shown in Figure 3, a lower mixing chamber 23 is provided at the lower part of the central mixing chamber 22. The outer diameter of the lower mixing chamber 23 is larger than the outer diameter of the lower nozzle part 1132 and smaller than the inner diameter of the upper part of the central mixing chamber 22.

[0026] The lower part of the central mixing chamber 22 has a smooth transition with the lower mixing tube 23.

[0027] An air inlet 24 is provided in the central mixing chamber 22, and the air inlet 24 is located in the area where the lower nozzle section 1132 is located. The air inlet 24 is connected to an external air supply device through an air inlet pipe 25. A through-pipe groove 211 is provided on the outside of the upper fixed pipe section 21 for the air inlet 24 to pass through.

[0028] The upper fixed tube 21 is fixedly installed on the top of the spray drying tank.

[0029] As attached Figure 1 , 2 As shown in Figure 4, the spiral spray channel 3 includes a central rod 31, an outer spiral surface 32, a bottom ring 33, and several bottom support plates 34.

[0030] The bottom of the central rod 31 is connected to the bottom ring 33 via several bottom support plates 34. The bottom ring 33 is connected to the bottom of the lower mixing chamber 23 via a threaded structure. The outer diameter of the bottom ring 33 is the same as the inner diameter of the lower mixing chamber 23. The outer diameter of the central rod 31 is 25% to 50% of the inner diameter of the lower mixing chamber 23. The outer spiral surface 32 is located on the outside of the central rod 31, and its outer contour is less than or equal to the inner diameter of the lower mixing chamber 23.

[0031] The height of the central rod 31 is 50% to 80% of the height of the lower mixing chamber 23. The upper part of the lower mixing chamber 23 is not provided with a spiral spray channel 3, which is used for the full mixing of airflow and liquid flow. Then, under the action of the spiral, they collide with each other to obtain more small droplets.

[0032] A cross recess 311 is arranged at the bottom of the central rod 31, and is used for screwing the spiral spray channel 3 to the lower mixing flow lumen 23.

[0033] It should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", "arranging" and the like should be interpreted in a broad sense, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A spray drying nozzle for preparing nanocomposite materials, characterized in that, The device includes an ultrasonic nozzle and a mixing section. The ultrasonic nozzle includes a nozzle tube and several ultrasonic generating units. A groove is provided in the center of the nozzle tube, and the ultrasonic generating units are annular and disposed within the groove of the nozzle tube. The nozzle is located at the lower part of the nozzle tube. The mixing section includes an upper fixed tube, a central mixing chamber, a lower mixing tube, an air inlet, and an air inlet pipe. The mixing section has a rotary structure with a through hole in the center. The inner diameter of the upper fixed tube is the same as the outer diameter of the nozzle and is connected to the nozzle by bolts. The nozzle is inserted into the central mixing chamber, and an air inlet is provided in the central mixing chamber area. An air inlet pipe is provided outside the air inlet.

2. The spray drying nozzle for preparing nanocomposite materials according to claim 1, characterized in that, A wire groove is provided on the nozzle sidewall above the groove.

3. The spray drying nozzle for preparing nanocomposite materials according to claim 1, characterized in that, The nozzle head includes an upper spray pipe and a lower spray pipe. The outer diameter of the upper spray pipe is smaller than the outer diameter of the lower part of the spray pipe, and the outer diameter of the lower spray pipe is smaller than the outer diameter of the upper spray pipe. The bottom of the lower spray pipe is provided with an inward chamfer.

4. The spray drying nozzle for preparing nanocomposite materials according to claim 3, characterized in that, A central mixing chamber is provided at the lower part of the upper fixed pipe section. The upper inner diameter of the central mixing chamber is the same as the outer diameter of the upper spray pipe section, and its height is greater than or equal to the height of the nozzle head. A lower mixing pipe section is provided at the lower part of the central mixing chamber. The outer diameter of the lower mixing pipe section is greater than the outer diameter of the lower spray pipe section and less than the upper inner diameter of the central mixing chamber. The lower part of the central mixing chamber and the lower mixing pipe section have a smooth transition. The air inlet is located in the area where the lower spray pipe section is located. A through-pipe groove is provided on the outside of the upper fixed pipe section for the air inlet to pass through.

5. The spray drying nozzle for preparing nanocomposite materials according to claim 1, characterized in that, The nozzle also includes a spiral spray channel; the spiral spray channel includes a central rod, an outer spiral surface, a bottom ring, and several bottom support plates; the bottom of the central rod is connected to the bottom ring through several bottom support plates, and the bottom ring is connected to the bottom of the lower mixing chamber through a threaded structure, and the outer diameter of the bottom ring is the same as the inner diameter of the lower mixing chamber.

6. The spray drying nozzle for preparing nanocomposite materials according to claim 5, characterized in that, The outer diameter of the central rod is 25% to 50% of the inner diameter of the lower mixing tube cavity, and the outer spiral surface is set on the outside of the central rod, with the outer contour being less than or equal to the inner diameter of the lower mixing tube cavity.

7. The spray drying nozzle for preparing nanocomposite materials according to claim 6, characterized in that, The height of the central rod is 50% to 80% of the height of the lower mixing chamber, and a cross groove is provided at the bottom of the central rod.

Images