A spray drying system to prevent clogging of the discharge elbow.

Abstract

This utility model discloses a spray drying system for preventing clogging of the discharge elbow, including a drying tower, a material collection device, and an induced draft fan. The discharge port of the drying tower is connected to a discharge elbow, which is connected to the material collection device via a pipe. The induced draft fan is also connected to the material collection device via a pipe. A Laval nozzle is installed inside the discharge elbow, and a hot air supply device connected to the Laval nozzle is also included. The spray drying system of this application, by spraying hot air into the discharge elbow through the Laval nozzle, can disperse the material accumulated in the discharge elbow, effectively improving the problem of material accumulation at the discharge elbow, avoiding clogging, and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of spray drying technology, specifically relating to a spray drying system that prevents the discharge elbow from clogging. Background Technology

[0002] Spray drying is a drying process in which a liquid raw material is dispersed into droplets using an atomizing disc, and then contacted with hot air (or other gas) to obtain a powder or granular product. The raw material can be a solution, emulsion, melt, or paste. The dried product can be made into powder, granules, hollow spheres, or agglomerates as needed.

[0003] The performance of sodium-ion battery cathode materials depends not only on their chemical composition but also on their microstructure. Among the various synthesis routes currently available, the method of milling raw materials followed by spray drying demonstrates unique advantages. Spray drying technology can not only accurately control the particle size distribution of the material but also significantly increase its specific surface area, thereby optimizing the electrochemical performance of the battery.

[0004] However, in actual production, the spray-dried material is prone to accumulating at the discharge bend of the drying tower, eventually completely blocking the discharge pipe and making normal production impossible. Furthermore, the material blocked at the discharge bend loses its properties, resulting in material waste. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a spray drying system that prevents the discharge bend from clogging, so as to effectively improve the problem of material accumulation at the discharge bend, avoid the discharge bend from clogging, and improve production efficiency.

[0006] This utility model solves the above problems through the following technical means:

[0007] A spray drying system for preventing clogging of the discharge elbow includes a drying tower, a material collection device, and an induced draft fan. The discharge port of the drying tower is connected to a discharge elbow, which is connected to the material collection device via a pipe. The induced draft fan is also connected to the material collection device via a pipe. A Laval nozzle is installed inside the discharge elbow, and the system also includes a hot air supply device connected to the Laval nozzle.

[0008] Furthermore, the hot air supply device includes a gas tank and a gas supply pipe. A heating wire is installed inside the gas tank, and an insulation layer is installed on the outside of the gas tank. The gas tank has an inlet end and an outlet end, and the outlet end of the gas tank is connected to a Laval nozzle through the gas supply pipe.

[0009] Furthermore, the discharge elbow comprises a metal outer tube and a plastic inner liner tube.

[0010] Furthermore, one end of the inner lining tube is connected to the gas supply pipe, and the other end is connected to the outlet of the drying tower.

[0011] Furthermore, the outer metal tube is made of stainless steel, and the inner plastic liner is made of polytetrafluoroethylene.

[0012] Furthermore, the air supply pipe is slidably fitted with the side wall of the discharge elbow.

[0013] This utility model has at least the following beneficial effects:

[0014] This invention discloses a spray drying system for preventing clogging of the discharge elbow, comprising a drying tower, a material collection device, and an induced draft fan. The discharge port of the drying tower is connected to a discharge elbow, which is connected to the material collection device via a pipe. The induced draft fan is also connected to the material collection device via a pipe. A Laval nozzle is installed inside the discharge elbow, and a hot air supply device connected to the Laval nozzle is also included. This spray drying system, by spraying hot air into the discharge elbow through the Laval nozzle, can disperse the material accumulated at the discharge elbow, effectively improving the problem of material accumulation at the discharge elbow, preventing clogging, and increasing production efficiency. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a spray drying system for preventing clogging of the discharge elbow provided by this utility model;

[0017] Figure 2 This is an enlarged schematic diagram of the discharge elbow;

[0018] Figure 3 This is an enlarged schematic diagram of the gas tank. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] like Figures 1-3As shown, this utility model discloses a spray drying system for preventing clogging of the discharge elbow, including a drying tower 1, a material collection device 2, and an induced draft fan 3. The discharge port of the drying tower is connected to a discharge elbow 5, which is connected to the material collection device through a pipe 4. The induced draft fan is connected to the material collection device through a pipe. During operation, the material is spray-dried in the drying tower. After spray drying, the material flows out from the discharge port under the suction of the induced draft fan, flows through the discharge elbow and the corresponding pipe, and is collected by the material collection device. The material collection device can be a cyclone separator, a bag filter, or other equipment.

[0022] The discharge elbow is equipped with a Laval nozzle 6, and also includes a hot air supply device connected to the Laval nozzle. In this embodiment, the hot air supply device includes a gas tank 8 and a gas supply pipe 7. A heating wire 10 is installed inside the gas tank, and an insulation layer 9 is installed on the outside of the gas tank. The gas tank has an inlet end 12 and an outlet end 11, and the outlet end of the gas tank is connected to the Laval nozzle through the gas supply pipe. In specific implementation, both the inlet end and the outlet end are equipped with corresponding valves to regulate the flow of air; air can be supplied to the gas tank through the inlet end. During operation, the gas tank has a certain pressure, the gas inside the gas tank is heated by the heating wire, the valve at the outlet end is opened, and the hot air flows to the Laval nozzle, and then is ejected through the Laval nozzle.

[0023] The spray drying system of this embodiment sprays hot air into the discharge bend through Laval nozzles. The spray direction is consistent with the material flow direction, which can disperse the material accumulated in the discharge bend, avoid material accumulation and caking, effectively improve the problem of material accumulation at the discharge bend, avoid blockage of the discharge bend, and improve production efficiency.

[0024] As a further improvement to the above technical solution, the discharge elbow includes a metal outer tube 501 and a plastic inner liner tube 502. One end of the inner liner tube is connected to the gas supply pipe, and the other end is connected to the discharge port of the drying tower. During the pipe connection process, clamps or similar structures can be used for fixation. In this embodiment, the metal outer tube is made of stainless steel, and the plastic inner liner tube is made of polytetrafluoroethylene (PTFE). The thickness of the PTFE inner liner tube is approximately 12mm. The surface of the PTFE inner liner tube is etched with a sodium naphthalene solution to leave a carbonized layer. Then, a high-temperature resistant phenolic epoxy resin is evenly applied to the surface, and the tube is fitted into the stainless steel outer tube. Bonding is completed by allowing it to stand at 24-30℃ for 24 hours. The surface friction coefficient of PTFE is only 0.05 (compared to 0.8 for glass), exhibiting excellent non-stick properties. Furthermore, PTFE possesses both high-temperature resistance (stable below 260℃) and superior chemical stability, ensuring that surface deformation and corrosion do not occur during long-term operation.

[0025] As a further improvement to the above technical solution, the air supply pipe and the side wall of the discharge elbow are sealed and slidably assembled. In specific implementation, a sealing element can be installed at the assembly point of the air supply pipe and the discharge elbow. With this structural form, the air supply pipe can be moved as needed to adjust the micro-strip Laval nozzle, which not only allows for fine adjustment of the spray point and direction of the hot airflow, but also allows for material agitation, thereby further preventing material bridging, accumulation, and blockage.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A spray drying system for preventing clogging of the discharge elbow, characterized in that: The device includes a drying tower, a material collection device, and an induced draft fan. The discharge port of the drying tower is connected to a discharge elbow, which is connected to the material collection device via a pipe. The induced draft fan is also connected to the material collection device via a pipe. A Laval nozzle is installed inside the discharge elbow, and the device also includes a hot air supply device connected to the Laval nozzle.

2. The spray drying system for preventing clogging of the discharge elbow according to claim 1, characterized in that: The hot air supply device includes a gas tank and a gas supply pipe. A heating wire is installed inside the gas tank, and an insulation layer is installed on the outside of the gas tank. The gas tank has an inlet end and an outlet end, and the outlet end of the gas tank is connected to a Laval nozzle through the gas supply pipe.

3. The spray drying system for preventing clogging of the discharge elbow according to claim 2, characterized in that: The discharge elbow comprises a metal outer tube and a plastic inner liner tube.

4. The spray drying system for preventing clogging of the discharge elbow according to claim 3, characterized in that: One end of the inner lining tube is connected to the gas supply pipe, and the other end is connected to the outlet of the drying tower.

5. The spray drying system for preventing clogging of the discharge elbow according to claim 4, characterized in that: The outer metal tube is made of stainless steel, and the inner plastic liner is made of polytetrafluoroethylene.

6. The spray drying system for preventing clogging of the discharge elbow according to claim 5, characterized in that: The air supply pipe is slidably and sealed to the side wall of the discharge elbow.

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