A spray drying heating device and a spray drying apparatus

Abstract

The utility model relates to air drying filtration technical field, concretely relates to a kind of spray drying heating device and spray drying equipment.The spray drying heating device includes shell body, air inlet cylinder, baffle cylinder and multiple electric heating tubes;One end of air inlet cylinder is set in the inside of shell body by passing the first end of shell body, and there is gas flow gap between the end of air inlet cylinder and the second end of shell body;One end of baffle cylinder is fixed in the second end inside shell body, and is sleeved on the outside of air inlet cylinder, and there is gas flow gap between the other end of baffle cylinder and the first end of shell body;The second end of shell body has exhaust hole, and exhaust hole is arranged between the lateral wall of shell body and baffle cylinder;Electric heating tube is sequentially arranged on baffle cylinder.The utility model is set by air inlet cylinder, baffle cylinder, increases the pipe course of heating, increases heating time;By setting multiple electric heating tubes, ultimately realize to increase heating efficiency, reduce heat loss rate, satisfy the demand of efficient, stable spray drying.

Description

Technical Field

[0001] This utility model relates to the field of air drying and filtration technology, and more specifically, to a spray drying heating device and spray drying equipment. Background Technology

[0002] In the spray drying process, the air entering the drying tower needs to be preheated to ensure that the material can be dried rapidly under suitable temperature conditions. However, existing spray drying heating devices suffer from problems such as low heating efficiency, uneven heat distribution, serious heat loss, and complex structure, which affect the drying effect and the overall performance of the equipment, making it difficult to meet the requirements of efficient and stable spray drying. Summary of the Invention

[0003] The purpose of this invention is to provide a spray drying heating device and spray drying equipment that can solve the above-mentioned technical problems.

[0004] In the first aspect, this utility model provides a spray drying heating device, which includes an outer shell, an air inlet cylinder, a partition cylinder, and multiple electric heating tubes; One end of the air inlet cylinder passes through the first end of the outer shell and is disposed inside the outer shell, and there is a gas flow gap between the end of the air inlet cylinder and the second end of the outer shell; One end of the partition cylinder is fixedly disposed inside the second end of the outer shell and sleeved on the outside of the air inlet cylinder; the other end of the partition cylinder has a gas flow gap with the first end of the outer shell. The second end of the outer casing has a vent hole, which is located between the side wall of the outer casing and the partition cylinder. The electric heating tubes are sequentially arranged on the partition cylinder.

[0005] In a preferred embodiment, the outer shell includes a shell wall, a first end plate, and a second end plate; The first end plate and the second end plate are respectively disposed at opposite ends of the shell wall; The first end plate is provided with a connection hole and an air inlet hole. The connection hole is for the electric heating tube to pass through, and the air inlet hole is for the air inlet cylinder to pass through. The vent is located on the second end plate.

[0006] In a preferred embodiment, a sealing element is provided in the connection hole to achieve a seal between the electric heating tube and the outer casing.

[0007] In a preferred embodiment, the first end of the outer casing has a protective cover for protecting the connector of the electric heating tube; The protective cover has a wire hole on its side wall.

[0008] In a preferred embodiment, the electric heating tube is spirally arranged.

[0009] In a preferred embodiment, the partition cylinder includes an inner layer plate, an outer layer plate, and an end sealing plate; The outer layer is sleeved on the outside of the inner layer, and a heating space is formed between the inner layer and the outer layer. The electric heating tube is disposed in the heating space. One end of the heating space is sealed by the end sealing plate, and the other end is sealed by the second end of the outer shell.

[0010] In a preferred embodiment, a temperature sensor is provided in the gas flow gap, and the temperature sensor is connected to the electric heating tube to detect the temperature of the electric heating tube.

[0011] In a preferred embodiment, the outer shell is provided with a heat insulation layer.

[0012] In a preferred embodiment, the insulation layer is sealed to the outer shell.

[0013] Secondly, this utility model also provides a spray drying device, which includes the spray drying heating device described in any of the above claims.

[0014] The beneficial effects of this utility model are: By adding an air inlet and baffle, the heating tube length and heating time are increased. By adding multiple electric heating tubes, the heating efficiency is increased, the heat loss rate is reduced, and the demand for efficient and stable spray drying is met. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the spray drying heating device provided in an embodiment of the present utility model; Figure 2 for Figure 1 AA section view; Figure 3 This is a schematic diagram of the structure of the partition cylinder of the spray drying heating device provided in an embodiment of the present utility model; Figure 4 A three-dimensional structural diagram of the partition cylinder of the spray drying heating device provided in this embodiment of the utility model (excluding the outer layer plate).

[0017] Icons: 1-Outer shell; 1.1-Shell wall; 1.2-First end plate; 1.3-Second end plate; 2-Protective cover; 3-Air inlet cylinder; 4-Baffle cylinder; 4.1-Inner layer plate; 4.2-Outer layer plate; 4.3-End sealing plate; 4.4-Heating space; 4.5-Through hole; 5-Electric heating element; 6-Temperature sensor; 6.1-Second mounting base; 3.2-First mounting base; 7-Connecting hole; 8-Insulation layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is combined with Figures 1-4 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Firstly, this utility model provides a spray drying heating device, such as... Figure 1 and Figure 2 As shown, it includes an outer shell 1, an air inlet cylinder 3, a partition cylinder 4, and multiple electric heating tubes 5; one end of the air inlet cylinder 3 passes through the first end of the outer shell 1 and is located inside the outer shell 1, and there is a gas flow gap between the end of the air inlet cylinder 3 and the second end of the outer shell 1; one end of the partition cylinder 4 is fixedly located inside the second end of the outer shell 1 and is sleeved on the outside of the air inlet cylinder 3, and there is a gas flow gap between the other end of the partition cylinder 4 and the first end of the outer shell 1; the second end of the outer shell 1 has an exhaust hole, which is located between the side wall of the outer shell 1 and the partition cylinder 4; the electric heating tubes 5 are sequentially arranged on the partition cylinder 4.

[0026] Specifically, this embodiment provides a spray drying heating device, the core components of which include an outer shell 1, an air inlet cylinder 3, a partition cylinder 4, and multiple electric heating tubes 5. The outer shell 1 is cylindrical in shape, possessing certain mechanical strength and stability, providing support and protection for other internal components. The air inlet cylinder 3 is a cylindrical pipe with a smooth surface and good corrosion resistance. One end of the air inlet cylinder 3 passes through the first end of the outer shell 1, is sealed, and extends into the internal space of the outer shell 1, while its other end maintains a certain distance from the second end of the outer shell 1, forming a gas flow gap. The partition cylinder 4 is a cylindrical tube, fitted outside the air inlet cylinder 3, with one end fixedly installed inside the second end of the outer shell 1, and the other end also leaving a gas flow gap with the first end of the outer shell 1. An exhaust port is provided on the second end of the outer shell 1, located in the annular area between the side wall of the outer shell 1 and the partition cylinder 4, for discharging the heated gas from the device. The electric heating element 5 is a slender tubular structure with a smooth surface and good thermal conductivity. It is arranged sequentially along the length of the partition cylinder 4 and fixedly installed on the partition cylinder 4. The components are assembled by welding or bolting to form a complete heating device structure.

[0027] The main function of the spray drying heating device provided in this embodiment is to provide a heat source for the spray drying process, heating the gas entering the device to a suitable temperature to meet the drying requirements of the material. The air inlet cylinder 3 is responsible for introducing external air or other gases into the device. The gas flows inside the air inlet cylinder 3, passes through the gas flow gap between the end of the air inlet cylinder 3 and the second end of the outer shell 1, enters the area between the air inlet cylinder 3 and the partition cylinder 4 inside the outer shell 1, then passes through the gas flow gap between the partition cylinder 4 and the first end of the outer shell 1, enters the gap between the partition cylinder 4 and the inner wall of the outer shell 1, and finally exits from the exhaust port.

[0028] The portion of the air inlet cylinder 3 inside the outer shell 1, the gas flow gap between the air inlet cylinder 3 and the second end of the outer shell 1, the gas flow gap between the air inlet cylinder 3 and the partition cylinder 4, the gas flow gap between the partition cylinder 4 and the first end of the outer shell 1, and the gas flow between the air inlet cylinder 3 and the partition cylinder 4 form a relatively long reciprocating gas channel. The electric heating tube 5 is located on the partition cylinder 4 in the middle. The partition cylinder 4 is a non-insulating plate, which can preheat the gas in the air inlet cylinder 3 and continue to heat the gas between the air inlet cylinder 3 and the partition cylinder 4, and between the air inlet cylinder 3 and the partition cylinder 4. This allows the gas to fully contact the electric heating tube 5 in the space between the partition cylinder 4 and the outer shell 1, realizing the transfer and exchange of heat, thereby improving the heating efficiency.

[0029] In practical applications, the spray drying heating device is first installed in the air intake system of the spray drying equipment, ensuring a tight connection between the air intake cylinder 3 and the external air compressor or blower to provide a stable gas source. The electric heating element 5 is connected to the external electrical control system via a power cord to control its power-on and power-off status and adjust the heating power. Before starting the spray drying equipment, a comprehensive inspection of the heating device is required, including ensuring the connections of all components are secure, checking for damage to the electric heating element 5, and ensuring the gas flow path is unobstructed. When starting the equipment, first turn on the gas supply source, allowing gas to flow into the air intake cylinder 3 at a certain flow rate. Then, gradually increase the input power of the electric heating element 5 to begin heating the gas. During the heating process, by monitoring the temperature of the gas discharged from the exhaust port, the heating power of the electric heating element 5 is adjusted in real time using the electrical control system to stabilize the gas temperature within the range required by the spray drying process. Simultaneously, it is important to observe the operating status of the device and regularly clean the dust and impurities inside the device to ensure smooth gas flow and optimal heating effect. When not in use, first turn off the power to the electric heating element 5, and then stop the gas supply after the gas temperature drops to a safe range to avoid damage to the device due to sudden temperature changes.

[0030] In a preferred embodiment, the outer shell 1 includes a shell wall 1.1, a first end plate 1.2, and a second end plate 1.3; the first end plate 1.2 and the second end plate 1.3 are respectively disposed at opposite ends of the shell wall 1.1; the first end plate 1.2 is provided with a connecting hole 7 and an air inlet hole, the connecting hole 7 is for the electric heating tube 5 to pass through, and the air inlet hole is for the air inlet cylinder 3 to pass through; the exhaust hole is disposed on the second end plate 1.3.

[0031] In this embodiment, the outer shell 1 is composed of a shell wall 1.1, a first end plate 1.2, and a second end plate 1.3. The shell wall 1.1 is a cylinder made of a metal sheet of a certain thickness, possessing good mechanical strength and rigidity, and capable of withstanding certain pressure and temperature changes. The first end plate 1.2 and the second end plate 1.3 are respectively installed at both ends of the shell wall 1.1 and are fixed together with the shell wall 1.1 by welding, snap-fitting, or bolting to form a closed cavity structure.

[0032] A connecting hole 7 and an air inlet are provided on the first end plate 1.2. The diameter of the connecting hole 7 matches the outer diameter of the electric heating tube 5, and the size of the air inlet is designed according to the outer diameter of the air inlet cylinder 3 to ensure that the air inlet cylinder 3 can pass through smoothly and be installed in a sealed manner. The inner wall of the air inlet is usually machined with threads or has a sealing groove to ensure a tight connection with the air inlet cylinder 3 and prevent gas leakage. The exhaust port is located on the second end plate 1.3, and its position and size are precisely calculated to ensure that the heated gas can be discharged smoothly without affecting the airflow distribution and heating effect inside the device. The structural design of the entire outer shell 1 fully considers the gas flow path, the installation space of the components, and the overall sealing and stability.

[0033] In this embodiment, the main function of the outer shell 1 is to provide a sealed chamber environment for the spray drying heating device, ensuring that the gas flows along a predetermined path during the heating process, thereby improving heating efficiency and safety.

[0034] The shell wall 1.1 isolates the internal components, such as the electric heating tube 5, air inlet cylinder 3, and partition cylinder 4, from the external environment, preventing the entry of external impurities and heat loss, while also protecting operators from injury caused by high-temperature components. The first end plate 1.2 and the second end plate 1.3 not only fix and support other components but also, through the connection hole 7, air inlet, and exhaust hole, enable the introduction, heating, and discharge of gas. The connection hole 7 provides an installation channel for the electric heating tube 5 and, through a tight fit with the heating tube 5, ensures the safety of the electrical connection and gas sealing. The air inlet is responsible for introducing external gas into the device, providing a gas source for the heating process. The exhaust hole leads the heated gas out of the device, ensuring that the gas can be delivered to the spray drying tower in a timely manner, maintaining the normal operation of the entire drying system. Furthermore, the enclosed structure of the outer shell 1 helps reduce noise transmission and lower the noise pollution caused by the equipment operation.

[0035] After the gas enters the outer shell 1 through the air inlet, it first passes through the gas flow gap between the air inlet cylinder 3 and the second end of the outer shell 1, and then flows into the heating area between the baffle cylinder 4 and the outer shell 1. During this process, the gas is heated by the electric heating tube 5, and its temperature gradually increases. Due to the sealed nature of the outer shell 1, the gas can only flow along the designed path, preventing leakage or short circuits, thus ensuring that heat is fully transferred to the gas. At the same time, the material and thickness of the shell wall 1.1 are selected to balance heat conduction and insulation performance, effectively transferring internal heat to the gas while minimizing heat loss to the external environment. Furthermore, the layout of the first end plate 1.2 and the second end plate 1.3, as well as the design of the connection hole 7, the air inlet, and the exhaust hole, all ensure smooth gas flow within the cavity, avoiding eddies, backflow, and other phenomena, thereby improving the heating efficiency and uniformity of the gas.

[0036] In a preferred embodiment, a sealing element is provided in the connection hole 7 to achieve a seal between the electric heating tube 5 and the outer casing 1.

[0037] In this embodiment, a sealing element is added inside the connection hole 7 to ensure the sealing performance when the connecting wire of the electric heating tube 5 passes through the connection hole 7.

[0038] Specifically, in this embodiment, the seal is typically made of a material that is high-temperature resistant, wear-resistant, and has good elasticity and compression resilience, such as fluororubber, silicone rubber, or graphite. The shape and size of the seal match the shape and size of the connecting hole 7, and it is installed on the inner wall of the connecting hole 7, tightly fitting the outer surface of the electric heating tube 5. A mounting groove or fixing structure may be provided in the peripheral area of ​​the connecting hole 7 to position and fix the seal, ensuring that it does not shift or deform during installation and use. The cross-sectional shape of the seal can be circular, square, rectangular, or other complex shapes, selected according to the specific sealing requirements and the structure of the connecting hole 7. Furthermore, to improve the sealing effect, a layer of lubricant or sealant can be coated on the surface of the seal to reduce the frictional resistance between the electric heating tube 5 and the seal, while enhancing the sealing performance.

[0039] In this embodiment, the main function of the seal is to seal the connection between the electric heating element 5 and the outer casing 1, preventing gas leakage from the connection hole 7 during heating and ensuring stable internal gas pressure and accurate gas flow. Since the electric heating element 5 generates high temperatures during operation, the seal needs to withstand the high-temperature environment while maintaining good sealing performance, preventing aging, deformation, or damage due to high temperatures. Furthermore, the seal also provides shock absorption and cushioning, reducing mechanical vibration and impact on the electric heating element 5 during operation and extending its service life. During gas heating, the seal effectively prevents outside air from entering the device, avoiding cold air contamination that could affect the heating effect, and also prevents high-temperature gas from leaking into the external environment, thus avoiding energy waste and safety hazards.

[0040] Specifically, in this embodiment, when the electric heating element 5 passes through the connecting hole 7 and presses against the seal, the seal undergoes elastic deformation in the radial direction, tightly fitting between the outer surface of the electric heating element 5 and the inner wall of the connecting hole 7, forming a continuous sealing barrier. Because the sealing material has high elasticity and compression resilience, it can maintain a certain sealing contact stress even under long-term high temperature and pressure, effectively preventing gas leakage. Furthermore, the high-temperature resistance of the seal allows it to function normally within the operating temperature range of the electric heating element 5, without performance degradation or failure due to temperature increases. In practical use, the smaller the clearance between the seal, the connecting hole 7, and the electric heating element 5, the better the sealing effect. Simultaneously, the material selection and structural design of the seal must also consider factors such as the properties, pressure, temperature of the gas, and vibration of the electric heating element 5 to ensure the reliability and stability of the sealing system.

[0041] When installing the electric heating element 5, first clean the surface of the connecting hole 7 and the electric heating element 5 to remove oil, dust, iron filings, and other impurities, ensuring the cleanliness of the connection area. Then, correctly install the seal in the predetermined position of the connecting hole 7, paying attention to the installation direction and positioning to avoid incorrect installation that could lead to seal failure. Slowly insert the electric heating element 5 into the connecting hole 7 while applying appropriate pressure to ensure the seal is evenly compressed and tightly adheres to the surface of the electric heating element 5. During installation, avoid excessive force or misaligned insertion to prevent damage to the seal or the electric heating element 5. After installation, inspect the connection area for signs of deformation, damage, or leakage in the seal. If any problems are found, adjust or replace it promptly. During equipment operation, regularly check the sealing performance of the seal. This can be done by observing for gas leaks at the connection area, such as bubbles or airflow sounds, or by using pressure testing equipment. If aging, wear, or decreased sealing performance is found in the seal, replace it promptly to ensure the normal operation and safe use of the device. When replacing the seal, follow the correct disassembly and installation procedures to avoid unnecessary damage to other components.

[0042] In this embodiment, in addition to commonly used sealants, other sealing methods such as sealant or sealing filler can also be used to achieve the seal between the electric heating tube 5 and the outer casing 1.

[0043] The sealant has good filling and adhesion properties, capable of filling the tiny gaps between the connecting hole 7 and the electric heating element 5, forming a unified sealing layer. When using the sealant, the surfaces of the connecting hole 7 and the electric heating element 5 must be thoroughly cleaned, and the application must be strictly followed according to the sealant's instructions, such as the mixing ratio and curing time. After curing, the sealant has high strength and sealing performance; however, once cured, disassembly and maintenance of the electric heating element 5 becomes relatively difficult. Therefore, it is suitable for applications where frequent disassembly is not required.

[0044] Sealing filler is a relatively traditional sealing material, usually made of soft, high-temperature resistant fibers or metal wires. In use, the sealing filler is wrapped around the connection point of the electric heating element 5, and a seal is achieved by compressing the filler. The advantages of sealing filler are easy installation, reusability, and the ability to adapt to vibration and displacement of the electric heating element 5 to a certain extent. However, its sealing effect may not be as good as that of sealing elements and sealants, and its selection needs to be based on specific sealing requirements and the operating environment.

[0045] In addition, connectors with sealing structures, such as sealing flanges or sealing joints, can be used to achieve a high-precision sealed connection between the electric heating tube 5 and the outer casing 1 through precise machining and sealing design.

[0046] In a preferred embodiment, the first end of the outer casing 1 has a protective cover 2, which is used to protect the connector of the electric heating tube 5; a wire hole is provided on the side wall of the protective cover 2.

[0047] In this embodiment, a protective cover 2 is added to the first end of the outer casing 1. The protective cover 2 is usually made of metal materials, such as stainless steel or aluminum plate, which have good mechanical strength and corrosion resistance and can withstand certain impacts and collisions.

[0048] In this embodiment, the protective cover 2 is shaped like a cylinder and a cone, that is, the cylindrical end is fixedly and sealed to the outer shell 1, and the smaller diameter end of the cone is sealed to the outer wall of the air inlet cylinder 3, ensuring that the joint of the electric heating tube 5 can be completely covered, and the sealed connection reduces heat dissipation.

[0049] Specifically, in this embodiment, the protective cover 2 is installed at the first end of the outer casing 1 by bolts, welding, or other fixing methods, and is tightly integrated with the outer casing 1 to form an integral structure. A wire passage hole is provided on the side wall of the protective cover 2. The size and shape of the wire passage hole are determined according to the diameter and number of wires in the electric heating element 5, and are usually circular or elliptical. The edges of the wire passage hole are chamfered or rounded to prevent wear on the wires during insertion. A sealing ring or sealing sleeve is provided at the wire passage hole to prevent external dust, moisture, and other foreign objects from entering the interior of the protective cover 2, while allowing the wires to pass through flexibly.

[0050] In this embodiment, the main function of the protective cover 2 is to protect the joint of the electric heating tube 5, preventing damage to the joint from external factors during equipment operation, such as mechanical impact, friction, dust intrusion, and moisture erosion, thereby extending the service life of the electric heating tube 5 and ensuring the stable operation of the heating system. The joint of the electric heating tube 5 is a relatively fragile and critical part of the entire heating device. Once the joint becomes loose, short-circuited, or damaged, it may cause the entire heating system to malfunction or even lead to a safety accident. The protective cover 2 can effectively isolate the influence of harmful external factors on the joint and reduce the risk of joint failure. At the same time, the design of the through hole facilitates the connection of the electric heating tube 5's wire to an external power source, ensuring the reliability and safety of the electrical connection. The sealing element on the through hole can further improve the protective performance of the protective cover 2, preventing foreign objects from entering the device and affecting the normal operation of other components.

[0051] When installing the protective cover 2, first determine its installation position and fixing method to ensure that the protective cover 2 accurately covers the connector of the electric heating tube 5 and fits tightly against the outer shell 1. Align the fixing parts of the protective cover 2, such as bolts and nuts, with the corresponding mounting holes on the outer shell 1, and use tools to firmly fix the protective cover 2 to the first end of the outer shell 1. During installation, pay attention to the flatness and sealing of the protective cover 2 to avoid gaps between the protective cover 2 and the outer shell 1 due to improper installation, which would affect the protective effect. Next, pass the wire of the electric heating tube 5 through the through hole, and install sealing elements, such as sealing rings or sealing sleeves, at the through hole as needed to ensure the sealing performance of the through hole. When connecting the external power supply, ensure that the wire connection is firm and reliable, and operate according to the correct electrical connection method to avoid electrical faults or safety hazards caused by incorrect wiring. During equipment operation, regularly check the appearance and fixing of the protective cover 2 to see if there is any deformation, damage or loosening, and check whether the sealing elements at the through hole are intact. If there are any problems, repair or replace them in time. When performing equipment maintenance and repairs, if it is necessary to disassemble the protective cover 2, the correct disassembly procedure should be followed to avoid unnecessary damage to the connector and the protective cover 2. When reinstalling the protective cover 2, ensure that it is restored to its original protective state to guarantee the safe operation of the electric heating tube 5 connector.

[0052] In a preferred embodiment, such as Figure 2 and Figure 4 As shown, the electric heating element 5 is spirally arranged.

[0053] In this embodiment, the electric heating tube 5 is arranged in a spiral configuration on the partition cylinder 4. The spiral spacing of the electric heating tube 5 is determined according to the diameter of the partition cylinder 4, the length of the electric heating tube 5, and the required heating area to ensure that the electric heating tube 5 forms a tight and uniform spiral line on the partition cylinder 4.

[0054] Specifically, in this embodiment, the spirally arranged electric heating tube 5 presents a regular spiral shape in appearance. Multiple electric heating tubes 5 are arranged in a straight line along the axial direction, extending from one end of the partition cylinder 4 to the other end, thereby increasing the contact area between the electric heating tube 5 and the gas.

[0055] The spiral-arranged electric heating tube 5 can significantly improve the heating efficiency and heat distribution uniformity of the heating device. Because the electric heating tube 5 is arranged in a spiral shape, when the gas flows in the space between the inlet cylinder 3 and the baffle cylinder 4, it can be fully heated by the electric heating tube 5, which prolongs the time for the gas to be heated by the electric heating tube 5 and increases the opportunity for heat transfer.

[0056] In practical applications, the spiral parameters of the electric heating tube 5, such as spiral diameter, pitch, and number of turns, need to be determined first based on the size and shape of the partition cylinder 4 and the overall layout of the heating device. Typically, professional design software is used for simulation and optimization to ensure that the spiral setting achieves the best heating effect.

[0057] At the wiring terminals of the electric heating element 5, wiring must be performed according to electrical connection specifications to ensure a secure and reliable connection. Insulation protection measures must be in place to prevent electrical faults and safety hazards. Before operation, the spirally arranged electric heating element 5 should be visually inspected and its electrical performance tested. It can only be put into use after confirmation that everything is correct. During equipment operation, the working status of the electric heating element 5 should be monitored regularly, including parameters such as temperature, power, and current. Any potential faults, such as localized overheating, short circuits, or open circuits, should be promptly identified and addressed. Simultaneously, the temperature distribution of the gas should be observed. The heating effect can be optimized by adjusting the power of the electric heating element 5 or the spiral parameters to ensure the smooth operation of the spray drying process.

[0058] In a preferred embodiment, such as Figure 2 and Figure 3 As shown, the partition cylinder 4 includes an inner plate 4.1, an outer plate 4.2, and an end seal 4.3; the outer plate 4.2 is sleeved on the outside of the inner plate 4.1, and a heating space 4.4 is formed between the inner plate 4.1 and the outer plate 4.2. The electric heating tube 5 is installed in the heating space 4.4. One end of the heating space 4.4 is sealed by the end seal 4.3, and the other end is sealed by the second end of the outer shell 1.

[0059] In this embodiment, the partition cylinder 4 consists of an inner plate 4.1, an outer plate 4.2, and an end seal 4.3. Both the inner plate 4.1 and the outer plate 4.2 are cylindrical bodies, typically made of metal materials such as stainless steel or aluminum alloy, which have good thermal conductivity and mechanical strength. The inner diameter of the inner plate 4.1 is larger than the outer diameter of the air inlet cylinder 3, thus forming a gas flow channel between the air inlet cylinder 3 and the inner plate 4.1.

[0060] The inner diameter of the outer layer plate 4.2 is larger than the outer diameter of the inner layer plate 4.1. It is fitted over the outer side of the inner layer plate 4.1, forming an annular heating space 4.4 between them. The end cap 4.3 is an annular metal plate installed at one end of the inner layer plate 4.1 and the outer layer plate 4.2. It seals the ends of the inner layer plate 4.1 and the outer layer plate 4.2 by welding or other sealing connection methods, ensuring the airtightness of the heating space 4.4. A through hole 4.5 is provided on the end cap 4.3 to allow the connection wire or part of the pipeline of the electric heating tube 5 to enter and exit. The other end of the partition cylinder 4 cooperates with the second end of the outer shell 1, sealing the heating space 4.4 between the inner layer plate 4.1 and the outer layer plate 4.2 through the second end of the outer shell 1, forming a relatively closed heating area. The electric heating tube 5 is installed in the heating space 4.4.

[0061] In this embodiment, the main function of the partition cylinder 4 is to form a heating space 4.4, so as to better and more evenly heat the gas in the gas flow channels inside and outside the partition cylinder 4, while avoiding the damage of impurities in the gas to the electric heating tube 5 and extending its service life.

[0062] In a preferred embodiment, a temperature sensor 6 is provided in the gas flow gap, and the temperature sensor 6 is connected to the electric heating tube 5 to detect the temperature of the electric heating tube 5.

[0063] In this embodiment, a temperature sensor 6 is added within the gas flow gap. The temperature sensor 6 is typically a thermocouple, resistance temperature detector (RTD), or temperature-sensitive resistor, which features fast response, high accuracy, and good linear output characteristics.

[0064] The probe of the temperature sensor 6 is installed in the heating space 4.4 and can directly contact the electric heating tube 5, or transfer the heat of the electric heating tube 5 to the temperature sensor 6 through the heat-conducting material, so as to accurately measure the temperature of the electric heating tube 5 itself.

[0065] The housing of temperature sensor 6 is typically made of high-temperature and corrosion-resistant metal materials, such as stainless steel or ceramic, to protect the internal temperature-sensing element from external environmental influences. The leads of temperature sensor 6 extend from the gas flow gap, are sealed, and then connect to the signal acquisition module of the external control system for transmitting temperature signals.

[0066] Specifically, in this embodiment, one end of the temperature sensor 6 is fixedly mounted on the end sealing plate 4.3 of the partition cylinder 4 via the first mounting base 6.2, and the other end of the temperature sensor 6 is fixedly mounted on the first end plate 1.2 of the outer casing 1 via the second mounting base 6.1.

[0067] The main function of temperature sensor 6 is to monitor the temperature of electric heating tube 5 in real time and feed the temperature signal back to the external control system.

[0068] The installation of temperature sensor 6 enables the heating device to have intelligent temperature monitoring and control capabilities. It can respond in a timely manner based on the temperature of electric heating tube 5, and promptly determine the maximum temperature of electric heating tube 5, avoiding damage to electric heating tube 5 due to abnormal temperature rise, thereby improving the reliability and safety of the heating device.

[0069] In a preferred embodiment, an insulation layer 8 is provided on the outside of the outer shell 1.

[0070] In this embodiment, the insulation layer 8 is a heat insulation board, which is cylindrically sleeved on the outside of the outer shell 1. There is a set gap between the inner side of the heat insulation board and the outer side of the shell wall 1.1 to increase the heat insulation effect.

[0071] Specifically, in this embodiment, the thickness of the insulation board is designed according to factors such as the required insulation effect, equipment size, and cost, and is generally between 5 and 50 mm.

[0072] In this embodiment, the main function of the insulation layer 8 is to reduce the heat lost by the heating device to the external environment during operation, improve the thermal efficiency of the heating device, and reduce energy consumption.

[0073] By installing an insulation layer 8 on the outer side of the shell wall 1.1, the thermal conductivity of the shell wall 1.1 can be effectively reduced, minimizing heat transfer from the high-temperature internal space to the external environment, thus ensuring that as much heat as possible inside the device is used for gas heating. Furthermore, the insulation layer 8 reduces the risk of burns to operators due to accidental contact with the outer shell 1 during equipment operation, improving equipment safety. In applications with specific temperature requirements, the insulation layer 8 can also reduce the thermal impact of the heating device on the surrounding environment, preventing excessively high indoor temperatures or other adverse effects caused by heat dissipation from the equipment.

[0074] In a preferred embodiment, the insulation layer 8 is sealed to the outer shell 1.

[0075] In this embodiment, the insulation layer 8 is sealed to the outer shell 1. The sealing connection is typically achieved using sealant, sealing tape, sealing gaskets, or other specialized sealing materials and structures, and is placed in the gap between the insulation layer 8 and the first end plate 1.2 or the second end plate 1.3 to form a continuous sealing barrier.

[0076] Sealant generally possesses good elasticity and adhesion, forming a tight bond between the insulation layer 8 and the outer shell 1, while also accommodating certain thermal expansion and contraction deformations. At the junction of the insulation layer 8 and the outer shell 1, specialized sealing grooves or steps may be provided to position and secure the sealing material, ensuring reliable sealing performance. Furthermore, the sealing connection may combine mechanical fastening methods, such as using pressure strips, clips, or bolts to press the insulation layer 8 firmly onto the outer shell 1, while simultaneously incorporating sealing elements at the pressing points to further enhance sealing performance. This sealing connection method not only prevents heat loss from the gap between the insulation layer 8 and the outer shell 1 but also prevents external moisture, dust, and other foreign matter from entering the insulation layer 8, extending its service life.

[0077] Secondly, this utility model also provides a spray drying device, which includes the spray drying heating device described in any of the above claims.

[0078] The beneficial effects of this utility model are: By setting up the air inlet cylinder 3 and the baffle cylinder 4, the heating tube length is increased, and the heating time is increased; by setting up multiple electric heating tubes 5, the heating efficiency is increased and the heat loss rate is reduced, thus meeting the requirements of efficient and stable spray drying.

[0079] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A spray drying heating device, characterized in that, It includes an outer casing, an air intake cylinder, a partition cylinder, and multiple electric heating elements; One end of the air inlet cylinder passes through the first end of the outer shell and is disposed inside the outer shell, and there is a gas flow gap between the end of the air inlet cylinder and the second end of the outer shell; One end of the partition cylinder is fixedly disposed inside the second end of the outer shell and sleeved on the outside of the air inlet cylinder; the other end of the partition cylinder has a gas flow gap with the first end of the outer shell. The second end of the outer casing has a vent hole, which is located between the side wall of the outer casing and the partition cylinder. The electric heating tubes are sequentially arranged on the partition cylinder.

2. The spray drying heating device according to claim 1, characterized in that, The outer shell includes a shell wall, a first end plate, and a second end plate; The first end plate and the second end plate are respectively disposed at opposite ends of the shell wall; The first end plate is provided with a connection hole and an air inlet hole. The connection hole is for the electric heating tube to pass through, and the air inlet hole is for the air inlet cylinder to pass through. The vent is located on the second end plate.

3. The spray drying heating device according to claim 2, characterized in that, A sealing element is provided in the connection hole to achieve a seal between the electric heating tube and the outer casing.

4. The spray drying heating device according to claim 1, characterized in that, The first end of the outer casing has a protective cover, which is used to protect the joint of the electric heating tube; The protective cover has a through hole on its side wall.

5. The spray drying heating device according to claim 1, characterized in that, The electric heating element is spirally arranged.

6. The spray drying heating device according to claim 1, characterized in that, The partition cylinder includes an inner layer plate, an outer layer plate, and an end sealing plate; The outer layer is sleeved on the outside of the inner layer, and a heating space is formed between the inner layer and the outer layer. The electric heating tube is disposed in the heating space. One end of the heating space is sealed by the end sealing plate, and the other end is sealed by the second end of the outer shell.

7. The spray drying heating device according to claim 1, characterized in that, A temperature sensor is installed inside the gas flow gap, and the temperature sensor is connected to the electric heating tube to detect the temperature of the electric heating tube.

8. The spray drying heating device according to claim 1, characterized in that, The outer shell is provided with a heat insulation layer.

9. The spray drying heating device according to claim 8, characterized in that, The insulation layer is sealed to the outer shell.

10. A spray drying device, characterized in that, Includes the spray drying heating apparatus according to any one of claims 1-9.

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