A graphene quantum dot spray drying collection tower

Abstract

The utility model discloses a kind of graphene quantum dot spray drying collection tower, it is related to graphene quantum dot production technical field, including tower body, multistage hot air system and collection hopper, tower body bottom is equipped with collection hopper, collection hopper inside upper portion is equipped with high-voltage electrostatic ring, tower body one side is equipped with multistage hot air system, tower body inside upper portion is equipped with atomizer, tower body top is equipped with feed pipe, tower body inside is equipped with preheating chamber, drying chamber and cooling chamber, preheating chamber is communicated with drying chamber, drying chamber and cooling chamber are communicated, multistage hot air system is connected preheating chamber, drying chamber and cooling chamber respectively;The utility model can be realized using hot air of different temperature to dry after atomized raw material, drying is divided into preheating, drying and cooling three stages, preheating chamber can avoid high temperature to destroy the structure of graphene quantum dot, drying chamber with gradually increasing temperature can accelerate moisture evaporation, improve drying efficiency and quality, and lower temperature cooling chamber can realize cooling dry powder, prevent caking.

Description

Technical Field

[0001] This utility model relates to the field of graphene quantum dot production technology, and in particular to a graphene quantum dot spray drying collection tower. Background Technology

[0002] Graphene quantum dots are a novel type of zero-dimensional carbon nanomaterial with unique structure and excellent properties, showing broad application prospects in multiple fields. Graphene quantum dots are typically derived from graphite or graphene oxide, with no more than five layers and a diameter of less than 10 nanometers (some definitions extend to within 100 nanometers). Their two-dimensional planar dimensions are less than 100 nanometers, and they include graphene quantum dots, graphene oxide quantum dots, and derivatives such as partially reduced graphene oxide quantum dots.

[0003] Graphene quantum dots are typically dried using spray drying. However, traditional spray drying towers lack temperature grading, relying solely on external hot air intake from the top to dry the atomized graphene quantum dots. Graphene quantum dots are heat-sensitive and easily oxidize above 150°C. Single-stage drying within a single temperature range leads to poor drying quality and low efficiency. Therefore, this invention proposes a graphene quantum dot spray drying collection tower to address the shortcomings of existing technologies. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a graphene quantum dot spray drying collection tower that can dry the atomized raw materials using hot air at different temperatures. The drying process is divided into three stages: preheating, drying, and cooling. The preheating chamber prevents high temperatures from damaging the structure of the graphene quantum dots. The gradually increasing temperature in the drying chamber accelerates moisture evaporation, improving drying efficiency and quality. The lower temperature in the cooling chamber cools the dried powder, preventing agglomeration.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A graphene quantum dot spray drying collection tower includes a tower body, a multi-stage hot air system, and a collection hopper. The collection hopper is located at the bottom of the tower body, and a high-voltage electrostatic ring is located above the inside of the collection hopper. The multi-stage hot air system is located on one side of the tower body, and an atomizer is located above the inside of the tower body. A feed pipe is located at the top of the tower body, with one end of the feed pipe connected to the atomizer inlet and the other end connected to an external feeding system. The tower body is equipped with a preheating chamber, a drying chamber and a cooling chamber. The preheating chamber is connected to the drying chamber and the drying chamber is connected to the cooling chamber. The multi-stage hot air system is connected to the preheating chamber, the drying chamber and the cooling chamber respectively.

[0006] A further improvement is that the multi-stage hot air system includes a heating tower, an air inlet chamber, and an air outlet chamber. The air inlet chamber is located at the bottom of the heating tower, and the air outlet chamber is located at the top of the heating tower. The heating tower between the air inlet chamber and the air outlet chamber is equipped with a first heating chamber, a second heating chamber, and a third heating chamber.

[0007] A further improvement is that heating elements are provided inside the first heating chamber, the second heating chamber, and the third heating chamber, and the first heating chamber is connected to the second heating chamber, and the second heating chamber is connected to the third heating chamber.

[0008] A further improvement is that the first heating chamber is connected to the cooling chamber via a first pipe, the second heating chamber is connected to the preheating chamber via a second pipe, and the third heating chamber is connected to the drying chamber via a third pipe.

[0009] A further improvement is that the first pipe is equipped with a first valve, the second pipe is equipped with a second valve, and the third pipe is equipped with a third valve.

[0010] A further improvement is that a separation pipe is provided on one side wall at the middle section of the collection hopper, and the separation pipe is connected to the cyclone separation system.

[0011] The beneficial effects of this utility model are as follows: By setting a preheating chamber, a drying chamber, and a cooling chamber inside the tower body, and by setting a first heating chamber, a second heating chamber, and a third heating chamber inside the heating tower of the multi-stage hot air system, which are respectively connected to the cooling chamber, the preheating chamber, and the drying chamber, it is possible to use hot air of different temperatures to dry the atomized raw materials. The drying is divided into three stages: preheating, drying, and cooling. The preheating chamber can avoid high temperature damage to the structure of graphene quantum dots. The drying chamber with gradually increasing temperature can accelerate the evaporation of moisture, improve drying efficiency and quality, and the cooling chamber with lower temperature can cool the dried powder and prevent agglomeration. This invention improves powder collection efficiency by setting a high-voltage electrostatic ring above the inside of the collection hopper. The high-voltage electrostatic ring can generate a large number of positive and negative ions inside the collection hopper. When the graphene quantum dots pass through the electric field, they will adsorb negative ions from the surrounding air, thereby making the dry powder charged and finally adsorbed and collected by the positively charged collection hopper. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a front view schematic diagram of the multi-stage hot air system structure of this utility model.

[0013] The components are as follows: 1. Tower body; 2. Multi-stage hot air system; 201. Heating tower; 202. Air inlet chamber; 203. Air outlet chamber; 204. First heating chamber; 205. Second heating chamber; 206. Third heating chamber; 207. Heating element; 3. Collection hopper; 4. High-voltage electrostatic ring; 5. Atomizer; 6. Feed pipe; 7. Preheating chamber; 8. Drying chamber; 9. Cooling chamber; 10. First pipeline; 11. Second pipeline; 12. Third pipeline; 13. Separation pipe. Detailed Implementation

[0014] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0015] according to Figure 1-2 As shown in the figure, this embodiment proposes a graphene quantum dot spray drying collection tower, including a tower body 1, a multi-stage hot air system 2, and a collection hopper 3. The collection hopper 3 is located at the bottom of the tower body 1, and a high-voltage electrostatic ring 4 is located above the inside of the collection hopper 3. The multi-stage hot air system 2 is located on one side of the tower body 1, and an atomizer 5 is located above the inside of the tower body 1. A feed pipe 6 is located at the top of the tower body 1. One end of the feed pipe 6 is connected to the input port of the atomizer 5, and the other end of the feed pipe 6 is connected to an external feeding system. The tower body 1 has a preheating chamber 7, a drying chamber 8, and a cooling chamber 9 inside. The preheating chamber 7 is connected to the drying chamber 8, and the drying chamber 8 is connected to the cooling chamber 9. The multi-stage hot air system 2 is connected to the preheating chamber 7, the drying chamber 8, and the cooling chamber 9 respectively.

[0016] In this invention, a multi-stage hot air system 2 is activated to introduce hot air at different temperatures into the preheating chamber 7, drying chamber 8, and cooling chamber 9 inside the tower body 1. An external feeding system feeds graphene quantum dot liquid material into the atomizer 5 through the feed pipe 6. The atomizer 5 sprays the liquid material out in the form of a spray, allowing the liquid material to fully contact the hot air to achieve drying. First, the graphene quantum dots are preheated in the preheating chamber 7 at 80-100°C. Then, the graphene quantum dots enter the drying chamber 8 for continuous drying at 120-140°C. Then, the graphene quantum dots enter the cooling chamber 9 for cooling at 40-60°C to prevent the quantum dots from agglomerating due to a sudden drop in temperature. Finally, they enter the collection hopper 3.

[0017] The multi-stage hot air system 2 includes a heating tower 201, an air inlet chamber 202, and an air outlet chamber 203. The air inlet chamber 202 is located at the lower part of the heating tower 201, and the air outlet chamber 203 is located at the upper part of the heating tower 201. A first heating chamber 204, a second heating chamber 205, and a third heating chamber 206 are located inside the heating tower 201 between the air inlet chamber 202 and the air outlet chamber 203. Each of the first heating chamber 204, the second heating chamber 205, and the third heating chamber 206 is equipped with a heating element 207. The first heating chamber 204 is connected to the second heating chamber 205, and the second heating chamber 205 is connected to the third heating chamber 206. The first heating chamber 204 is connected to a cooling chamber 9 via a first pipe 10. The second heating chamber 205 is connected to a preheating chamber 7 via a second pipe 11. The third heating chamber 206 is connected to a drying chamber 8 via a third pipe 12. In this invention, the first heating chamber 204 serves as the first step of the heating system, where the initial heating hot air has the lowest temperature. Therefore, it is directed to the cooling chamber 9 and used as cooling air to cool the graphene quantum dots. The hot air initially heated in the first heating chamber 204 enters the second heating chamber 205 and is gradually heated. This hot air serves as the working hot air in the preheating chamber 7. Finally, the hot air heated to the highest temperature serves as the working temperature in the drying chamber 8. This invention's multi-stage hot air system 2 generates hot air through gradual heating and delivers it to different working areas, effectively and rationally utilizing the temperature at each stage, resulting in high efficiency and high resource utilization.

[0018] The first pipe 10 is equipped with a first valve, the second pipe 11 is equipped with a second valve, and the third pipe 12 is equipped with a third valve.

[0019] A separation pipe 13 is provided on one side wall at the middle section of the collection hopper 3, and the separation pipe 13 is connected to a cyclone separation system. The hot air that cannot be collected in the collection hopper 3 and the graphene quantum dots mixed in are fed into the cyclone separation system for separation, and the graphene quantum dots are further recovered.

[0020] This invention utilizes hot air at different temperatures to dry atomized raw materials by setting up a preheating chamber 7, a drying chamber 8, and a cooling chamber 9 inside the tower body 1, and by setting up a first heating chamber 204, a second heating chamber 205, and a third heating chamber 206 inside the heating tower 201 of the multi-stage hot air system 2, which are respectively connected to the cooling chamber 9, the preheating chamber 7, and the drying chamber 8. The drying process is divided into three stages: preheating, drying, and cooling. The preheating chamber 7 can prevent high temperatures from damaging the structure of graphene quantum dots. The gradually increasing temperature of the drying chamber 8 can accelerate moisture evaporation, improve drying efficiency and quality, while the lower temperature of the cooling chamber 9 can cool the dried powder and prevent agglomeration. This invention also uses a high-voltage electrostatic ring 4 set above the inside of the collecting hopper 3. The high-voltage electrostatic ring 4 can form a large number of positive and negative ions inside the collecting hopper 3. When the graphene quantum dots pass through the electric field, they will adsorb negative ions from the surrounding air, thereby charging the dried powder and finally collecting it by the positively charged collecting hopper 3, thus improving the powder collection efficiency.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A graphene quantum dot spray drying collection tower, characterized in that: The tower body (1), multi-stage hot air system (2), and collection hopper (3) are provided. The bottom of the tower body (1) is provided with collection hopper (3). A high-voltage electrostatic ring (4) is provided inside the upper part of the collection hopper (3). A multi-stage hot air system (2) is provided on one side of the tower body (1). An atomizer (5) is provided inside the upper part of the tower body (1). A feed pipe (6) is provided at the top of the tower body (1). One end of the feed pipe (6) is connected to the input port of the atomizer (5), and the other end of the feed pipe (6) is connected to an external feeding system. The tower body (1) is equipped with a preheating chamber (7), a drying chamber (8) and a cooling chamber (9). The preheating chamber (7) is connected to the drying chamber (8), and the drying chamber (8) is connected to the cooling chamber (9). The multi-stage hot air system (2) is connected to the preheating chamber (7), the drying chamber (8) and the cooling chamber (9) respectively.

2. The graphene quantum dot spray drying collection tower according to claim 1, characterized in that: The multi-stage hot air system (2) includes a heating tower (201), an air inlet chamber (202) and an air outlet chamber (203). The air inlet chamber (202) is located at the bottom inside the heating tower (201), and the air outlet chamber (203) is located at the top inside the heating tower (201). The heating tower (201) between the air inlet chamber (202) and the air outlet chamber (203) has a first heating chamber (204), a second heating chamber (205) and a third heating chamber (206).

3. The graphene quantum dot spray drying collection tower according to claim 2, characterized in that: Heating elements (207) are provided inside the first heating chamber (204), the second heating chamber (205) and the third heating chamber (206), and the first heating chamber (204) is connected to the second heating chamber (205), and the second heating chamber (205) is connected to the third heating chamber (206).

4. The graphene quantum dot spray drying collection tower according to claim 3, characterized in that: The first heating chamber (204) is connected to the cooling chamber (9) through the first pipe (10), the second heating chamber (205) is connected to the preheating chamber (7) through the second pipe (11), and the third heating chamber (206) is connected to the drying chamber (8) through the third pipe (12).

5. The graphene quantum dot spray drying collection tower according to claim 4, characterized in that: The first pipe (10) is provided with a first valve, the second pipe (11) is provided with a second valve, and the third pipe (12) is provided with a third valve.

6. The graphene quantum dot spray drying collection tower according to claim 1, characterized in that: A separation pipe (13) is provided on one side wall at the middle section of the collection hopper (3), and the separation pipe (13) is connected to the cyclone separation system.

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