Rotary drying device for drying metal powder
By designing a thermal energy circulation device in the rotary drying device, the aluminum oxide layer, molecular sieve layer, activated carbon layer and electric heating network absorb and filter water vapor, retain heat energy, and realize heat recycling, the heat exchanger blockage caused by dust impurities and metal particles in the water vapor during the drying process of metal powder is solved, and the heat exchange efficiency and heat energy utilization rate are improved.
Patent Information
- Application Number
- CN202421331529.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In the prior art, the water vapor generated by the metal powder during the drying process contains dust impurities and metal particles, which leads to the internal pipeline of the heat exchanger being easily blocked, increasing energy consumption, and reducing heat exchange efficiency and heat energy utilization.
A rotary drying device is designed, including a drying device, a rotary drum and a thermal energy circulation device. The thermal energy circulation device is composed of a fan, a gas pipe, a drying box and a connecting pipe. The drying box is composed of an alumina layer, a molecular sieve layer, an activated carbon layer and an electric heating network. Through these layers, water vapor is absorbed and filtered, thermal energy is retained, and gas is heated again through the electric heating network, and the gas is circulated in the rotary drum for drying.
It effectively solves the problem of heat exchanger blockage, improves heat exchange efficiency and heat energy utilization, realizes heat recycling, and reduces energy consumption.
Smart Images
Figure CN222578742U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal powder drying, in particular to a rotary drying device used for drying metal powder. Background Art
[0002] Metal powder may absorb moisture from the air during production and storage, which will increase the water content of the metal powder. Moisture will affect the physical and chemical properties of the metal powder, such as electrical conductivity, thermal conductivity and chemical activity. Drying can remove this unnecessary moisture to ensure the quality and performance of the metal powder. Drying can also improve the stability of the metal powder and prevent unnecessary chemical reactions during storage and use.
[0003] In the prior art, a portion of water vapor is generated during the drying process of metal powder and remains in the drying drum. At this time, the water vapor usually carries a large amount of heat, and the heat in the water vapor can be recycled. Most production sites choose to use heat exchangers to extract the heat energy in the water vapor. However, the water vapor generated during the drying of metal powder contains dust impurities and metal particles. The internal pipes of the heat exchanger are easily blocked after long-term use, resulting in increased energy consumption, reduced surface area for heat transfer, decreased heat exchange efficiency, and reduced thermal energy utilization. Summary of the invention
[0004] The purpose of the utility model is to provide a rotary drying device for drying metal powder to solve the problems raised in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] The invention comprises a drying device and a rotary drum, and also comprises a heat energy circulation device for recycling steam. The rotary drum is movably connected to the interior of the drying device, and the heat energy circulation device is arranged on one side of the rotary drum. The heat energy circulation device is composed of a fan, an air pipe, a drying box, and a connecting pipe. The fan is connected to one side of the rotary drum, and the fan is connected to one end of the air pipe, and the other end of the air pipe is connected to the drying box. One side of the drying box is connected to the connecting pipe, and one end of the connecting pipe is fixed to the rotary drum. The steam generated during the drying process passes through the fan through the air pipe to reach the drying box, and then enters the interior of the rotary drum from the connecting pipe. The drying box is composed of an aluminum oxide layer, a molecular sieve layer, an activated carbon layer, and an electric heating network. The above filter layers have the same size and equal spacing. The aluminum oxide layer is connected to the interior of the drying box, the molecular sieve layer is arranged on one side of the aluminum oxide layer, and the activated carbon layer is arranged on one side of the molecular sieve layer. After the water vapor contacts the above structure, the water molecules are absorbed, and the heat energy can be retained. The electric heating network is arranged on one side of the activated carbon layer, and the electric heating network further heats the filtered gas. The invention solves the problem that the heat energy in water vapor is extracted by using a heat exchanger in the prior art. However, the water vapor generated when the metal powder is dried contains dust impurities and metal particles. The internal pipes of the heat exchanger are easily blocked after long-term use, resulting in increased energy consumption, reduced surface area for heat transfer, decreased heat exchange efficiency and reduced thermal energy utilization.
[0007] Preferably, a motor is connected to one side of the drying device, and a rotating drum is connected to the output end of the motor. After the motor is started, the rotating drum is driven to rotate in the drying device, and the metal powder in the drum is turned over.
[0008] Preferably, a feed hopper is provided on one side above the drying device, and a discharge hopper is provided on one side below the drying device. Undried metal powder is poured into the feed hopper, and dried powder is discharged from the discharge hopper, which is convenient for later unified collection.
[0009] Preferably, a first electric telescopic tube is provided on one side of the rotating drum, and the caliber of the first electric telescopic tube matches the feed hopper, and a second electric telescopic tube is provided on the other side of the rotating drum, and the caliber of the second electric telescopic tube matches the discharge hopper. When the metal powder is ready to be poured into the drying device, the first electric telescopic tube is connected to the feed hopper, and the powder can smoothly enter the rotating drum. The first electric telescopic tube is then retracted, and the internal valve is closed. The metal powder is dried during the rotation of the rotating drum. The second electric telescopic tube is connected to the discharge hopper, and the valve inside the tube is opened, and the powder is poured out through the discharge hopper.
[0010] Preferably, a hot air blower is connected to the other side of the drying device. After the hot air blower is started, hot air is delivered to the drum, which can provide sufficient air flow speed to ensure that the hot air is fully in contact with the powder material and remove moisture in the powder.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] In the utility model, water vapor is drawn into the air delivery pipe, passes through the air delivery pipe and enters the interior of the drying box. After the water vapor contacts the alumina layer, the water molecules in the water vapor will not only diffuse through the tiny pores of the alumina, but also react with the water vapor at high temperature to form hydrated alumina, which has a strong hygroscopic property and helps the alumina absorb water molecules. The molecular sieve can selectively adsorb water molecules of specific size and shape, and then the water vapor is further dried when it contacts it. The activated carbon layer can not only adsorb a part of the water molecules, but also adsorb the metal particles and dust carried by the water vapor. The water vapor water The molecules can retain heat energy while being adsorbed. Finally, the dried water vapor gas is heated again through the electric heating network to make the heat in the gas higher. At this time, it is transported back to the rotary drum by the connecting pipe to help dry the metal powder, thereby achieving the purpose of heat recycling. This solves the problem of using a heat exchanger to extract heat energy from water vapor in the prior art. However, the water vapor generated by the drying of the metal powder contains dust impurities and metal particles. The internal pipes of the heat exchanger are easily blocked after long-term use, resulting in increased energy consumption, reduced surface area for heat transfer, reduced heat exchange efficiency, and reduced thermal energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the drying device in the utility model;
[0014] Figure 2 This is a schematic diagram of the first internal structure of the drying device in the utility model;
[0015] Figure 3 This is a schematic diagram of the second internal structure of the drying device in the utility model;
[0016] Figure 4 This is a schematic diagram of the structure of the heat energy circulation device in the utility model;
[0017] Figure 5 It is a schematic diagram of the internal structure of the drying box in the utility model.
[0018] In the figure: drying device 1, feed hopper 2, hot air blower 3, motor 4, discharge hopper 5, rotating drum 6, first electric telescopic tube 7, second electric telescopic tube 8, fan 9, gas pipe 10, drying box 11, connecting pipe 12, alumina layer 13, molecular sieve layer 14, activated carbon layer 15, electric heating network 16, thermal energy circulation device 17. DETAILED DESCRIPTION
[0019] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.
[0020] It should be noted that all terms used in the present invention for directional and positional indications, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.
[0021] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0023] In conjunction with the following drawings, the utility model provides a technical solution:
[0024] The invention comprises a drying device 1 and a rotary drum 6, and also comprises a heat energy circulation device 17 for recycling steam. The rotary drum 6 is movably connected to the interior of the drying device 1, and the heat energy circulation device 17 is arranged on one side of the rotary drum 6. The heat energy circulation device 17 is composed of a fan 9, an air supply pipe 10, a drying box 11, and a connecting pipe 12. The fan 9 is connected to one side of the rotary drum 6, and the fan 9 is connected to one end of the air supply pipe 10. The other end of the air supply pipe 10 is connected to the drying box 11. One side of the drying box 11 is connected to the connecting pipe 12. One end of the connecting pipe 12 is fixed to the rotary drum 6. The steam generated during the drying process passes through the fan 9 through the air supply pipe 10. The air pipe 10 reaches the drying box 11 and enters the inside of the drum 6 from the connecting pipe 12. The drying box 11 is composed of an aluminum oxide layer 13, a molecular sieve layer 14, an activated carbon layer 15, and an electric heating network 16. The above filter layers are of the same size and have equal spacing. The aluminum oxide layer 13 is connected to the inside of the drying box 11, the molecular sieve layer 14 is arranged on one side of the aluminum oxide layer 13, and the activated carbon layer 15 is arranged on one side of the molecular sieve layer 14. After water vapor contacts the above structure, water molecules are absorbed and heat energy can be retained. The electric heating network 16 is arranged on one side of the activated carbon layer 15, and the electric heating network 16 further heats the filtered gas.
[0025] During use, the metal powder in the drum 6 will generate water vapor during the drying process. The fan 9 is started, and the water vapor is sucked into the air pipe 10, and passes through the air pipe 10 into the interior of the drying box 11. The connection between the drying box 11 and the pipeline can be disassembled, which is convenient for regular replacement and cleaning of the internal structure. Several filter layers are arranged in the drying box 11. The water vapor with heat first contacts the aluminum oxide layer 13. Aluminum oxide is a metal material. The water molecules in the water vapor will not only diffuse through the tiny pores of aluminum oxide, but also react with water vapor at high temperature to form hydrated aluminum oxide. It has a strong hygroscopic property, which helps aluminum oxide absorb water molecules. Then it contacts the molecular sieve layer 14. The molecular sieve is a silicate or aluminum silicate material with a cubic lattice. It is characterized by a uniform microporous structure and can selectively adsorb water molecules of a specific size and shape. Then the water vapor is further dried when it contacts it. The remaining water vapor contacts the activated carbon layer 15. The micropores and mesoporous structures of the activated carbon provide a large number of adsorption surfaces. Water molecules can be physically adsorbed on these surfaces. The activated carbon layer 15 can not only adsorb a part of the water molecules, but also adsorb the metal particles and dust carried by the water vapor. The water vapor and water molecules can retain heat energy while being adsorbed. Finally, the gas of the dried water vapor is heated again through the electric heating network 16 to make the heat in the gas higher. At this time, it is transported back to the rotary drum 6 by the connecting pipe 12 to help dry the metal powder and achieve the purpose of heat recycling. It solves the problem of using a heat exchanger to extract heat energy from water vapor in the prior art. However, the water vapor generated by the metal powder during drying contains dust impurities and metal particles. The internal pipes of the heat exchanger are easily blocked after long-term use, resulting in increased energy consumption, reduced surface area for heat transfer, reduced heat exchange efficiency, and reduced thermal energy utilization.
[0026] In a further preferred embodiment, a motor 4 is connected to one side of the drying device 1 , and a rotating drum 6 is connected to an output end of the motor 4 .
[0027] In the present application, after the motor 4 is started, it drives the drum 6 to rotate in all directions in the drying device 1. The inner wall of the drum 6 is provided with spiral channels, which help to guide the flow of metal powder. The metal powder in the drum is constantly flipped. During the flipping process, the contact area between the powder and the drum 6 increases, and the moisture in the powder evaporates faster.
[0028] In a further preferred embodiment, a feed hopper 2 is provided on an upper side of the drying device 1 , and a discharge hopper 5 is provided on a lower side of the drying device 1 .
[0029] In the present application, undried metal powder is poured from the feed hopper 2 into the rotating drum 6. Since the inner wall of the rotating drum 6 is provided with a spiral channel to guide the flow of the metal powder, the dried powder can leak out from the discharge hopper 5, which is convenient for unified collection later.
[0030] In a further preferred embodiment, a first electric telescopic tube 7 is provided on one side of the rotating drum 6, and the caliber of the first electric telescopic tube 7 matches the feed hopper 2, and a second electric telescopic tube 8 is provided on the other side of the rotating drum 6, and the caliber of the second electric telescopic tube 8 matches the discharge hopper 5.
[0031] In the present application, when the metal powder is poured into the drying device 1, the position of the first electric telescopic tube 7 is located directly below the feed hopper 2, the tube mouth is automatically connected to the feed hopper 2, the valve in the tube is opened, and the powder is able to smoothly enter the rotating drum 6. The first electric telescopic tube 7 is retracted, the valve is closed, and the rotating drum 6 starts to rotate. When the rotation stops, the position of the second telescopic tube 8 is aligned with the discharge hopper 5, and the second electric telescopic tube 8 is automatically connected to the discharge hopper 5. The powder reaches the discharge hopper 5 through the telescopic tube and then leaks out of the drying device 1.
[0032] In a further preferred embodiment, a hot air blower 3 is connected to the other side of the drying device 1 .
[0033] In the present application, after the hot air blower 3 is started, the hot air is delivered to the drum 6, which can provide a sufficient air flow velocity to ensure that the hot air is fully in contact with the powder material and remove moisture in the powder.
[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A rotary drying device for drying metal powder, comprising a drying device (1) and a rotating drum (6), characterized in that: It also includes a heat energy circulation device (17) for circulating steam, the rotary drum (6) being movably connected to the interior of the drying device (1), and the heat energy circulation device (17) being arranged on one side of the rotary drum (6); The heat energy circulation device (17) is composed of a fan (9), an air supply pipe (10), a drying box (11), and a connecting pipe (12); the fan (9) is connected to one side of the drum (6); the fan (9) is connected to one end of the air supply pipe (10); the other end of the air supply pipe (10) is connected to the drying box (11); one side of the drying box (11) is connected to the connecting pipe (12); one end of the connecting pipe (12) is fixed to the drum (6); the steam generated during the drying process passes through the fan (9) through the air supply pipe (10) to the drying box (11), and then enters the interior of the drum (6) from the connecting pipe (12); The drying box (11) is composed of an aluminum oxide layer (13), a molecular sieve layer (14), an activated carbon layer (15), and an electric heating network (16); the aluminum oxide layer (13) is connected to the interior of the drying box (11); the molecular sieve layer (14) is arranged on one side of the aluminum oxide layer (13); the activated carbon layer (15) is arranged on one side of the molecular sieve layer (14); and the electric heating network (16) is arranged on one side of the activated carbon layer (15); the electric heating network (16) further heats the filtered gas.
2. A rotary drying device for drying metal powder according to claim 1, characterized in that: A motor (4) is connected to one side of the drying device (1), and a rotating drum (6) is connected to the output end of the motor (4).
3. A rotary drying device for drying metal powder according to claim 1, characterized in that: A feed hopper (2) is provided on one side above the drying device (1), and a discharge hopper (5) is provided on one side below the drying device (1).
4. The rotary drying device for drying metal powder according to claim 1, characterized in that: A first electric telescopic tube (7) is provided on one side of the rotating drum (6), and the caliber of the first electric telescopic tube (7) matches the feed hopper (2). A second electric telescopic tube (8) is provided on the other side of the rotating drum (6), and the caliber of the second electric telescopic tube (8) matches the discharge hopper (5).
5. The rotary drying device for drying metal powder according to claim 1, characterized in that: The other side of the drying device (1) is connected to a hot air blower (3).