Spray dryer

Abstract

The utility model discloses a spray dryer which comprises a drying chamber, a cyclone separator, an atomizing nozzle, an air pump, an air inlet pipe and a heater, the two ends of the air inlet pipe are communicated with the drying chamber and the air pump respectively, the heater is installed on the air inlet pipe, an air supply pipe is arranged between the cyclone separator and the drying chamber, and the atomizing nozzle is installed on the air supply pipe. The two ends of the air supply pipe are communicated with the drying chamber and the cyclone separator respectively, the atomization nozzle is installed on the drying chamber, the drying chamber is fixedly connected with a heat conduction piece, the heat conduction piece is arranged on the side wall of the drying chamber in a penetrating mode, the two ends of the heat conduction piece are provided with a heat absorption structure and a heat release structure respectively, and the heat absorption structure is located in the drying chamber. And the heat release structure is positioned on the air inlet pipe. The drying device has the beneficial effects that the influence of the drying time on the concentration of a finished product is reduced, the concentration of a concentrated extracting solution after drying is facilitated, and the advantage that moisture in the concentrated extracting solution of the finished product is not easy to evaporate is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of dryers, specifically to a spray dryer. Background Technology

[0002] A spray dryer is a device that can simultaneously perform drying and granulation. Liquid raw materials are atomized into a mist through an atomizer, allowing them to fully contact with hot air and thus be dried. The dried product is continuously output from the bottom of the drying chamber and a cyclone separator. The concentrated extract after drying exits from the bottom of the drying chamber, while the powdered material exits from the cyclone separator.

[0003] Chinese utility model patent CN205461058U discloses a spray dryer for testing traditional Chinese medicinal materials, including an atomizer, a drying chamber, a cyclone separator, an exhaust pipe, a peristaltic pump, a collection pipe, and a collection bottle. The inlet of the peristaltic pump is connected to the inlet pipe, and the outlet of the peristaltic pump is connected to the inlet of the atomizer via a food-grade silicone tube. The nozzle of the atomizer is connected to the inlet of the drying chamber. The bottom of the drying chamber is connected to the collection pipe, the outlet of the drying chamber is connected to the inlet of the cyclone separator, the outlet at the top of the cyclone separator is connected to the exhaust pipe, and the bottom of the cyclone separator is connected to the collection bottle. The atomizer, drying chamber, cyclone separator, exhaust pipe, collection pipe, and collection bottle are all made of transparent high borosilicate heat-resistant glass. This allows the spray drying process to be carried out in a pollution-free environment, and the entire spray drying experiment process can be directly observed, facilitating timely problem identification and resolution by the user; it is also easy to clean.

[0004] Because spray dryers require continuous drying over long periods, the concentrated extract below the drying chamber also continuously evaporates moisture, affecting the final product concentration due to the varying drying time. This makes it difficult to control the final concentration. Therefore, existing technologies suffer from the technical problem of easy evaporation of moisture from the concentrated extract. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a spray dryer, which includes a drying chamber, a cyclone separator, an atomizing nozzle, an air pump, an air inlet pipe, and a heater. This spray dryer has the advantage that the water in the concentrated extract of the finished product does not easily evaporate.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A spray dryer includes a drying chamber, a cyclone separator, an atomizing nozzle, an air pump, an air inlet pipe, and a heater. The air inlet pipe is connected to the drying chamber and the air pump at both ends. The heater is mounted on the air inlet pipe. An air supply pipe is provided between the cyclone separator and the drying chamber, with both ends connected to the drying chamber and the cyclone separator. The atomizing nozzle is mounted on the drying chamber. A heat-conducting component is fixedly connected to the drying chamber and passes through the side wall of the drying chamber. The heat-conducting component has a heat-absorbing structure and a heat-releasing structure at both ends. The heat-absorbing structure is located inside the drying chamber, and the heat-releasing structure is located on the air inlet pipe and between the air pump and the heater.

[0008] This setup effectively reduces the evaporation rate of the concentrated extract stored at the bottom of the drying chamber, minimizes the impact of drying time on the final product concentration, facilitates the concentration of the concentrated extract after drying, and achieves the advantage that the water in the final concentrated extract does not easily evaporate.

[0009] Preferably, the heat-absorbing structure includes an outer annular tube, a support column is fixedly connected to the outer annular tube, the support column is fixedly connected to the inner wall of the drying chamber, and the outer annular tube is connected to a heat-conducting component.

[0010] This setup ensures that the outer ring tube remains stable within the drying chamber.

[0011] Preferably, the heat-conducting component is a heat-conducting pipe, which is connected to the outer annular pipe.

[0012] This setup improves the cooling effect on the air at the bottom of the drying chamber.

[0013] Preferably, the heat-absorbing structure further includes an inner annular tube, and a connecting member is provided between the inner annular tube and the outer annular tube.

[0014] This setup further enhances the cooling effect on the air at the bottom of the drying chamber.

[0015] Preferably, the connector is a connecting pipe whose two ends are respectively connected to the inner annular pipe and the outer annular pipe.

[0016] This setup improves the cooling effect on the air at the bottom of the drying chamber.

[0017] Preferably, the inner annular tube is fixedly connected to a connecting rod, and the connecting rod is fixedly connected to a heat-conducting sheet.

[0018] This setup further reduces the evaporation rate of the concentrated extract stored at the bottom of the drying chamber.

[0019] Preferably, the heat-conducting sheet has a through hole in the middle.

[0020] This setup further reduces the evaporation rate of the concentrated extract stored at the bottom of the drying chamber.

[0021] Preferably, the heat-absorbing structure includes a heat-conducting plate, which is fixedly connected to an air intake pipe.

[0022] This configuration improves the efficiency of the heat-conducting components in transferring heat to the air inside the intake pipe through the heat-absorbing structure.

[0023] Preferably, multiple heat-conducting plates are provided.

[0024] This configuration further improves the efficiency of the heat-conducting components in transferring heat to the air inside the intake pipe through the heat-absorbing structure.

[0025] Preferably, the heat-absorbing structure is located below the gas supply pipe.

[0026] This design allows the heat-absorbing structure to better absorb heat from the air at the bottom of the drying chamber.

[0027] Compared with the prior art, this utility model has achieved beneficial technical effects:

[0028] 1. By absorbing heat from the bottom of the drying chamber through the heat-absorbing structure, the evaporation rate of the concentrated extract stored at the bottom of the drying chamber can be effectively reduced, the impact of drying time on the concentration of the finished product can be reduced, and the concentration of the concentrated extract after drying can be facilitated, achieving the advantage that the water in the finished concentrated extract does not easily evaporate.

[0029] 2. The heat from the heat-absorbing structure is transferred to the heat-releasing structure through the heat-conducting component. The air in the intake pipe absorbs the heat from the heat-releasing structure, thereby preheating the air in the intake pipe, which improves the heating efficiency of the air and reduces energy consumption. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a spray dryer according to an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the structure of the air pump and air inlet pipe in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the heat-absorbing and heat-releasing structures in the embodiments of this utility model.

[0033] The technical features referred to by the various reference numerals in the accompanying drawings are as follows:

[0034] 11. Drying chamber; 12. Cyclone separator; 13. Atomizing nozzle; 14. Air pump; 15. Air inlet pipe; 16. Heater; 17. Air delivery pipe; 21. Heat-conducting component; 22. Heat-conducting plate; 31. Outer annular tube; 32. Support column; 33. Inner annular tube; 34. Connector; 35. Connecting rod; 36. Heat-conducting plate; 37. Through hole. Detailed Implementation

[0035] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. However, the scope of protection of this utility model is not limited to the specific embodiments described below.

[0036] refer to Figure 1-3 A spray dryer includes a drying chamber 11, a cyclone separator 12, an atomizing nozzle 13, an air pump 14, an air inlet pipe 15, and a heater 16.

[0037] The intake pipe 15 is connected to the drying chamber 11 and the air pump 14 at both ends. A heater 16 is installed on the intake pipe 15 and is equipped with a heating wire for heating the air inside the intake pipe 15. An air supply pipe 17 is provided between the cyclone separator 12 and the drying chamber 11, with both ends connected to the drying chamber 11 and the cyclone separator 12. An atomizing nozzle 13 is installed on the drying chamber 11. A heat-conducting component 21 is fixedly connected to the drying chamber 11, passing through the side wall of the drying chamber 11. The heat-conducting component 21 has a heat-absorbing structure and a heat-releasing structure at both ends. The heat-absorbing structure is located inside the drying chamber 11, and the heat-releasing structure is located on the intake pipe 15, between the air pump 14 and the heater 16. The heat-absorbing structure is located below the air supply pipe 17, allowing it to better absorb heat from the air at the bottom of the drying chamber 11.

[0038] The heat-absorbing structure includes an outer annular tube 31, to which a support column 32 is fixedly connected. The support column 32 is fixedly connected to the inner wall of the drying chamber 11, and the outer annular tube 31 is connected to a heat-conducting component 21. The support column 32 and the outer annular tube 31 provide support, ensuring the stability of the outer annular tube 31 within the drying chamber 11. The heat-conducting component 21 is a heat-conducting pipe, which communicates with the outer annular tube 31. Air can circulate within the heat-conducting pipe and the outer annular tube 31, promoting heat transfer from the outer annular tube 31 to the heat-releasing structure, thereby improving heat exchange efficiency and enhancing the cooling effect on the air at the bottom of the drying chamber 11. The heat-absorbing structure also includes an inner annular tube 33, to which a connector 34 is provided. The inner annular tube 33 absorbs heat from the bottom of the drying chamber 11, further enhancing the cooling effect on the air at the bottom of the drying chamber 11. The connector 34 is a connecting pipe with its two ends connected to the inner annular pipe 33 and the outer annular pipe 31, respectively. Air can circulate within the inner annular pipe 33 and the outer annular pipe 31 through the connecting pipe, thereby promoting heat transfer from the inner annular pipe 33 to the outer annular pipe 31 and the heat-dissipating structure, improving heat exchange efficiency and enhancing the cooling effect on the air at the bottom of the drying chamber 11. A connecting rod 35 is fixedly connected to the inner annular pipe 33, and a heat-conducting plate 36 is fixedly connected to the connecting rod 35. The heat-conducting plate 36 absorbs heat from the air at the bottom of the drying chamber 11, further reducing the evaporation rate of the concentrated extract stored at the bottom of the drying chamber 11. A through hole 37 is provided in the middle of the heat-conducting plate 36, allowing air to circulate within it. This increases the contact area between the heat-conducting plate 36 and the air, improving the heat exchange efficiency between the heat-conducting plate 36 and the air, and increasing the efficiency of the heat-conducting plate 36 in absorbing heat from the air, further reducing the evaporation rate of the concentrated extract stored at the bottom of the drying chamber 11.

[0039] The heat-absorbing structure includes a heat-conducting plate 22, which is fixedly connected and located inside the intake pipe 15. Heat from the heat-conducting component 21 is transferred to the heat-conducting plate 22, ensuring full contact between the heat-conducting plate 22 and the air inside the intake pipe 15. This improves the efficiency of heat transfer from the heat-conducting component 21 to the air inside the intake pipe 15 through the heat-absorbing structure. Multiple heat-conducting plates 22 are provided; the arrangement of multiple heat-conducting plates 22 further enhances the efficiency of heat transfer from the heat-conducting component 21 to the air inside the intake pipe 15 through the heat-absorbing structure.

[0040] The specific working process is as follows: Liquid material is injected into the atomizing nozzle 13, which sprays the liquid material into the drying chamber 11. The heater 16 heats the air in the air inlet pipe 15, and the air pump 14 delivers the higher-temperature air from the air inlet pipe 15 into the drying chamber 11, where the higher-temperature air heats and dries the liquid material. Incompletely evaporated droplets flow downwards to the bottom of the drying chamber 11, forming a concentrated extract. The evaporated droplets, after drying, form powder and are carried by air through the air supply pipe 17 into the cyclone separator 12, falling to the bottom of the cyclone separator 12 under gravity. The water vapor in the droplets flowing downwards to the bottom of the drying chamber 11 evaporates, increasing their concentration, thus achieving the functions of drying and adjusting the material concentration.

[0041] This embodiment has the following advantages:

[0042] By absorbing heat from the bottom of the drying chamber 11 through the heat-absorbing structure, the evaporation rate of the concentrated extract stored at the bottom of the drying chamber 11 can be effectively reduced, the impact of drying time on the concentration of the finished product can be reduced, and the concentration of the concentrated extract after drying can be facilitated, achieving the advantage that the water in the finished concentrated extract does not easily evaporate.

[0043] The heat from the heat-absorbing structure is transferred to the heat-releasing structure through the heat-conducting component 21. The air in the intake pipe 15 absorbs the heat from the heat-releasing structure, thereby preheating the air in the intake pipe 15, which improves the heating efficiency of the air and reduces energy consumption.

[0044] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the utility model.

Claims

1. A spray dryer, characterized in that: The system includes a drying chamber (11), a cyclone separator (12), an atomizing nozzle (13), an air pump (14), an air inlet pipe (15), and a heater (16). The two ends of the air inlet pipe (15) are connected to the drying chamber (11) and the air pump (14) respectively. The heater (16) is installed on the air inlet pipe (15). An air supply pipe (17) is provided between the cyclone separator (12) and the drying chamber (11). The two ends of the air supply pipe (17) are connected to the drying chamber (11) and the cyclone separator (13) respectively. The separator (12) is connected, and the atomizing nozzle (13) is installed on the drying chamber (11). The drying chamber (11) is fixedly connected to a heat-conducting component (21). The heat-conducting component (21) passes through the side wall of the drying chamber (11). The heat-conducting component (21) has a heat-absorbing structure and a heat-releasing structure at both ends. The heat-absorbing structure is located inside the drying chamber (11), and the heat-releasing structure is located on the air inlet pipe (15). The heat-releasing structure is located between the air pump (14) and the heater (16).

2. The spray dryer according to claim 1, characterized in that: The heat absorption structure includes an outer annular tube (31), which is fixedly connected to a support column (32). The support column (32) is fixedly connected to the inner wall of the drying chamber (11), and the outer annular tube (31) is connected to a heat-conducting component (21).

3. The spray dryer according to claim 2, characterized in that: The heat-conducting component (21) is a heat-conducting pipe, which is connected to the outer annular pipe (31).

4. The spray dryer according to claim 2, characterized in that: The heat absorption structure also includes an inner annular tube (33), and a connector (34) is provided between the inner annular tube (33) and the outer annular tube (31).

5. The spray dryer according to claim 4, characterized in that: The connector (34) is a connecting pipe whose two ends are respectively connected to the inner annular pipe (33) and the outer annular pipe (31).

6. The spray dryer according to claim 4, characterized in that: The inner annular tube (33) is fixedly connected to a connecting rod (35), and the connecting rod (35) is fixedly connected to a heat-conducting plate (36).

7. The spray dryer according to claim 6, characterized in that: The heat-conducting sheet (36) has a through hole (37) in the middle.

8. The spray dryer according to claim 1, characterized in that: The heat absorption structure includes a heat-conducting plate (22), which is fixedly connected to an air inlet pipe (15).

9. The spray dryer according to claim 8, characterized in that: Multiple heat-conducting plates (22) are provided.

10. The spray dryer according to claim 1, characterized in that: The heat-absorbing structure is located below the gas supply pipe (17).

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