Self-circulating climbing film evaporator

Abstract

The utility model relates to the technical field of lift film evaporator, and disclose self -circulation lift film evaporator from circulating, including heating evaporation cylinder, feed head and discharge head, heating evaporation cylinder bottom is equipped with feed head, and heating evaporation cylinder top is equipped with discharge head, and heating evaporation cylinder both ends are equipped with two connecting flanges that are axis symmetry distribution, feed head with discharge head and heating evaporation cylinder both ends pass through bolt and flange cooperation connection, still include uniform heating subassembly, set up in heating evaporation cylinder inside, the uniform heating subassembly bottom axle end corresponds with heating evaporation cylinder inside bottom end through bolt cooperation connection, and this self -circulation lift film evaporator passes through the innovative design of oval tube bundle and spiral baffle, has improved equipment performance significantly.

Description

Technical Field

[0001] This utility model relates to the field of rising film evaporator technology, specifically a self-circulating rising film evaporator. Background Technology

[0002] In industries such as chemical, food, and pharmaceutical, evaporation and concentration are crucial steps in material handling. Self-circulating rising film evaporators are widely used due to their high efficiency and energy-saving characteristics. Traditional rising film evaporators typically employ circular heating tube bundles and horizontal baffles. However, with the expansion of production scale and the increasing complexity of materials, the limitations of traditional equipment have become increasingly apparent. Circular heating tube bundles have limited heating area, making it difficult to meet the heat transfer efficiency requirements of high-load production. Horizontal baffles can easily create dead zones in fluid flow, leading to increased pressure drop and energy consumption. Furthermore, uneven material distribution within the tubes can result in excessively thick or dry liquid films in certain areas, affecting evaporation efficiency. In addition, the traditional structure lacks sufficient fluid scouring force against the tube walls, making it easy for dirt to adhere and requiring frequent shutdowns for cleaning, resulting in high equipment maintenance costs. Moreover, the uneven support provided by the horizontal baffles to the tube bundle increases the risk of fluid-induced vibration, shortening the equipment's lifespan. Therefore, we have proposed a self-circulating rising film evaporator. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a self-circulating rising film evaporator, which solves the aforementioned problems.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a self-circulating rising film evaporator, comprising: The heating evaporator includes a heating evaporator, a feed end cap, and a discharge end cap. The heating evaporator has a feed end cap at the bottom and a discharge end cap at the top. The heating evaporator has two symmetrically distributed connecting flanges at both ends. The feed end cap and the discharge end cap are connected to the heating evaporator by bolts and flanges at both ends. A uniform heating component is disposed inside the heating evaporation cylinder, and the bottom shaft end of the uniform heating component is connected to the bottom end of the heating evaporation cylinder by bolts.

[0005] Preferably, the heating evaporator is a hollow cylindrical structure with openings at both ends. The bottom of the side wall of the heating evaporator is provided with a steam inlet and a liquid outlet, which are distributed in opposite directions. Both the steam inlet and the liquid outlet are connected to the interior of the heating evaporator. The top of the side wall of the heating evaporator is provided with a steam outlet, which is on the same side as the steam inlet and is connected to the interior of the heating evaporator.

[0006] Preferably, the bottom shaft end of the heating evaporator is provided with a connecting ring, and four lifting lugs arranged in a ring array are welded to the side wall of the heating evaporator, and the lifting lug group is placed between the steam inlet and the steam outlet.

[0007] Preferably, the top of the feed head is provided with a flange that is connected to the heating evaporation cylinder, and the top of the feed head is an open structure, the bottom of the feed head is provided with a feed port, and the side wall of the feed head is provided with a circulation return port, which is connected to the inside of the feed head.

[0008] Preferably, the bottom of the discharge head is provided with a flange that is connected to the heating evaporation cylinder, the bottom of the feed head is an open structure, and the top of the discharge head is provided with a discharge port.

[0009] Preferably, the uniform heating assembly includes a heating tube bundle and a baffle, with the baffle positioned inside the heating tube bundle.

[0010] Preferably, both ends of the heating tube bundle are provided with tube plates, the bottom tube plate of the heating tube bundle is connected to the connecting ring by a matching bolt, and the heating tube bundle is provided with a group of tube bundles distributed in equal rings at equal intervals inside, and the radial cross section of the tube bundles is elliptical.

[0011] Preferably, the two axial ends of the flow deflector are welded to the opposite sides of the two tube sheets, and the flow deflector is provided with a spiral plate inside. The flow deflector has a set of annularly distributed mating holes in the axial direction. The mating holes penetrate the spiral plate and are mated to the tube bundle.

[0012] Compared with the prior art, this utility model provides a self-circulating rising film evaporator, which has the following beneficial effects: This self-circulating rising film evaporator significantly improves equipment performance through an innovative design of elliptical tube bundles and spiral baffles. The elliptical tube bundles increase the heat transfer area, and the spiral plates of the baffles enhance turbulence, resulting in a substantial increase in the heat transfer coefficient and material evaporation efficiency. Simultaneously, the optimized structure of both components improves fluid dynamics, reduces fouling, lowers the frequency of equipment cleaning, and extends continuous operation time. The spiral baffles provide uniform support to the tube bundle, reducing the risk of fluid-induced vibration and improving equipment stability and lifespan. Furthermore, the compact overall structure, along with the design of connecting rings and lifting lugs, facilitates installation and transportation, effectively improving industrial production efficiency and reducing overall operating costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the self-circulating rising film evaporator of this utility model; Figure 2 This is a cross-sectional schematic diagram of the self-circulating rising film evaporator of this utility model; Figure 3 This is a cross-sectional schematic diagram of the heating evaporation cylinder of this utility model; Figure 4 This is a cross-sectional schematic diagram of the heating tube bundle component of this utility model; Figure 5 This is a schematic diagram of the baffle element of this utility model.

[0014] In the diagram: 1. Heating evaporator; 2. Feed head; 3. Discharge head; 4. Heating tube bundle; 5. Baffle; 6. Feed inlet; 7. Circulation return outlet; 8. Discharge outlet; 9. Lifting lug; 10. Steam inlet; 11. Steam outlet; 12. Liquid outlet; 13. Connecting ring; 14. Tube sheet; 15. Tube bundle; 16. Spiral plate; 17. Mating hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 A self-circulating rising film evaporator includes: The heating evaporator 1 includes a feeding head 2 and a discharging head 3. The feeding head 2 is located at the bottom of the heating evaporator 1, and the discharging head 3 is located at the top of the heating evaporator 1. Two connecting flanges are symmetrically distributed at both ends of the heating evaporator 1. The feeding head 2 and the discharging head 3 are connected to the flanges at both ends of the heating evaporator 1 by bolts. A uniform heating component is installed inside the heating evaporation cylinder 1, and the bottom shaft end of the uniform heating component is connected to the bottom end of the heating evaporation cylinder 1 by bolts.

[0017] Furthermore, the heating evaporator 1 is a hollow cylindrical structure with openings at both ends. The bottom of the side wall of the heating evaporator 1 is provided with a steam inlet 10 and a liquid outlet 12, which are distributed in opposite directions. Both the steam inlet 10 and the liquid outlet 12 are connected to the interior of the heating evaporator 1. The top of the side wall of the heating evaporator 1 is provided with a steam outlet 11, which is on the same side as the steam inlet 10 and is connected to the interior of the heating evaporator 1. High-temperature steam enters the interior of the heating evaporator 1 through the steam inlet 10, allowing the uniform heating components to be heated in a spiral manner. Finally, the high-temperature steam is discharged through the steam outlet 11, and the water liquid after the high-temperature steam is liquefied will slide to the bottom of the interior of the heating evaporator 1 and finally be discharged through the liquid outlet 12.

[0018] Furthermore, a connecting ring 13 is provided inside the bottom shaft end of the heating evaporator 1, and four lifting lugs 9 arranged in a ring array are welded to the side wall of the heating evaporator 1. The lifting lugs 9 are positioned between the steam inlet 10 and the steam outlet 11. The connecting ring 13 provides support and connection for the uniform heating component, and the lifting lugs 9 on the side wall of the heating evaporator 1 facilitate hoisting and transportation.

[0019] Furthermore, the top of the feed head 2 is provided with a flange that is connected to the heating evaporation cylinder 1, and the top of the feed head 2 is an open structure. The bottom of the feed head 2 is provided with a feed inlet 6, and the side wall of the feed head 2 is provided with a circulation return port 7. The circulation return port 7 is connected to the inside of the feed head 2. The material after evaporation and filtration will be returned to the inside of the feed head 2 by the external matching device through the circulation return port 7, and the work will be repeated.

[0020] Furthermore, the bottom of the discharge head 3 is provided with a flange that is connected to the heating evaporation cylinder 1, the bottom of the feed head 2 is an open structure, and the top of the discharge head 3 is provided with a discharge port 8.

[0021] Furthermore, the uniform heating assembly includes a heating tube bundle 4 and a baffle 5, with the baffle 5 positioned inside the heating tube bundle 4.

[0022] Furthermore, both ends of the heating tube bundle 4 are provided with tube plates 14. The bottom tube plate 14 of the heating tube bundle 4 is connected to the connecting ring 13 by adapter bolts. Inside the heating tube bundle 4, there is a group of tube bundles 15 distributed in equal rings at equal intervals. The radial cross-section of the tube bundles 15 is elliptical. Under the same cross-sectional area, the elliptical structure of the tube bundles 15 has a larger perimeter, increasing the heating area and improving the heat transfer efficiency. Its streamlined structure improves the hydrodynamic properties, enhances turbulence scouring, reduces fouling, and makes the liquid film spread more evenly, avoiding local excessive thickness. At the same time, the elliptical tubes have high bending stiffness in the long axis direction and strong resistance to compression and deformation.

[0023] Furthermore, the two axial ends of the baffle 5 are welded to the opposite sides of the two tube sheets 14, and the baffle 5 is provided with a spiral plate 16 inside. The baffle 5 has a set of annularly distributed mating holes 17 in the axial direction. The mating holes 17 penetrate the spiral plate 16 and are inserted into the tube bundle 15. The spiral structure of the baffle 5 avoids the sudden flow deflection of the horizontal baffle plate, greatly reduces the flow dead zone and pressure drop, and enhances the turbulence intensity, destroys the heat transfer boundary layer, and greatly improves the heat transfer coefficient. The spiral flow scours the tube bundle 15 more evenly, which can reduce the probability of fouling and significantly enhance the anti-fouling ability. In addition, the spiral structure of the baffle 5 provides more uniform support for the tube bundle 15, which can reduce the risk of fluid-induced vibration and extend the service life of the equipment. Moreover, the fluid distribution is more uniform, avoiding the heat transfer efficiency decay caused by uneven local flow velocity.

[0024] Structural Description: Heating Evaporation Cylinder 1: Heating evaporation cylinder 1 is a hollow cylindrical cylinder with open ends. It is the core container of the self-circulating rising film evaporator. The bottom of the side wall is provided with a steam inlet 10 and a liquid outlet 12, and the top is provided with a steam outlet 11. Both ends are connected to the feed head 2 and the discharge head 3 through flanges, providing space and heat exchange site for material evaporation. Feed head 2: The feed head 2 is located at the bottom of the heating evaporation cylinder 1. It has an opening at the top and is connected to the cylinder body through a flange. The bottom feed port 6 is used for material input, and the side wall circulation return port 7 allows the insufficiently evaporated material to flow back, ensuring that the evaporation process is continuous and stable. Discharge head 3: The discharge head 3 is installed on the top of the heating evaporator 1 and is also connected by a flange. It has an opening at the bottom and a discharge port 8 at the top for discharging the concentrated material and completing the output of the evaporation product. Heating tube bundle 4: The tube bundle 15 is fixed by the tube plates 14 at both ends of the heating tube bundle 4. The bottom tube plate 14 is connected to the connecting ring 13. The internal elliptical tube bundle 15 increases the heating area and efficiently transfers the heat of high temperature steam to the material inside the tube to realize the heating and evaporation function. Baffle 5: Baffle 5 is placed inside the heating tube bundle 4, with its two shaft ends welded to the tube sheet 14. The internal spiral plate 16 is inserted into the tube bundle 15 through the mating hole 17, changing the material flow path to a spiral shape, enhancing turbulence, and improving heat transfer efficiency and anti-fouling ability. Feed inlet 6: Feed inlet 6 is located at the bottom of feed head 2 and serves as the starting channel for material to enter the self-circulating rising film evaporator, ensuring that the material can smoothly enter the heating evaporation cylinder 1 and participate in the evaporation process; Circulation return port 7: Circulation return port 7 is located on the side wall of the feed head 2 and is connected to the interior. Guided by an external device, the material that has not met the evaporation requirements is returned to the equipment for reprocessing, thereby improving the material evaporation efficiency and utilization rate. Discharge port 8: Discharge port 8 is located at the top of discharge head 3 and is used to output the material that has completed evaporation and concentration, and to transport the product that meets the process requirements to the subsequent stage to achieve the material processing goal; Lifting lugs 9: Four lifting lugs 9 are welded in a ring array on the side wall of the heating evaporator 1, distributed between the steam inlet 10 and the steam outlet 11, to provide a point of leverage for the hoisting and handling of the equipment, and to facilitate the installation and relocation of the equipment; Steam inlet 10: The steam inlet 10 is located at the bottom of the side wall of the heating evaporation cylinder 1. It is the inlet for high-temperature steam. High-temperature steam enters the cylinder through this inlet and exchanges heat with the heating tube bundle 4 to provide the heat required for material evaporation. Steam outlet 11: Steam outlet 11 is located at the top of the side wall of the heating evaporator 1 and on the same side as the steam inlet 10. It is used to discharge the steam after heat exchange is completed, maintain the steam circulation inside the equipment, and ensure a continuous supply of heat. Liquid outlet 12: Liquid outlet 12 is located at the bottom of the side wall of the heating evaporator 1, opposite to the steam inlet 10, and is used to discharge the water after the high temperature steam is liquefied to prevent liquid accumulation from affecting the normal operation of the equipment and heat transfer. Connecting ring 13: The connecting ring 13 is located inside the bottom shaft end of the heating evaporator cylinder 1. It is connected to the bottom tube plate 14 of the heating tube bundle 4 by the adapter bolt, which provides stable support for the uniform heating component and ensures the installation accuracy and stability of the component. Tube sheet 14: The tube sheet 14 is located at both ends of the heating tube bundle 4. It is used not only to fix the tube bundle 15, but also to be welded to the baffle 5. It is connected to the connecting ring 13 through the bottom tube sheet to ensure the structural stability and heat transfer performance of the heating assembly. Tube bundle 15: The tube bundle 15 is distributed in a ring at equal intervals within the heating tube bundle 4, and the radial cross section is elliptical. The larger perimeter increases the heating area, while the streamlined structure optimizes the hydrodynamic performance, improving heat transfer efficiency and anti-fouling ability. Spiral plate 16: The spiral plate 16 is located inside the baffle 5. The annularly distributed mating holes 17 on it are inserted into the tube bundle 15 to make the material spiral flow, enhance the turbulence effect, improve the heat transfer coefficient, and reduce the accumulation of dirt. Matching holes 17: The matching holes 17 are distributed in a ring at equal intervals on the spiral plate 16 of the baffle 5, and are inserted into the tube bundle 15 to accurately position the baffle 5 and the tube bundle 15, ensuring the stability of the spiral flow path of the material and guaranteeing the heat transfer effect.

[0025] Working Principle: The self-circulating rising film evaporator is correctly installed according to the diagram. During operation, the material enters the equipment through the feed inlet 6 at the bottom of the feed head 2, and then flows into the heating evaporation cylinder 1. High-temperature steam enters through the steam inlet 10 at the bottom of the side wall of the heating evaporation cylinder 1, exchanging heat with the internal uniform heating assembly. The uniform heating assembly consists of heating tube bundles 4 and baffles 5. The radial cross-section of the tube bundles 15 of the heating tube bundles 4 is elliptical. The baffles 5 have spiral plates 16 inside. The high-temperature steam flows inside the heating evaporation cylinder 1, causing the heating tube bundles 4 to be heated spirally. The heat is transferred to the material inside the tubes. After being heated inside the elliptical tube bundles 15, the material forms a rising film on the tube wall. Due to the larger perimeter of the elliptical structure, the heating area is larger. The increased heat transfer efficiency accelerates the evaporation of materials. The spiral plate 16 of the baffle 5 changes the material flow path, making the material flow in a spiral manner, avoiding the sudden flow of traditional horizontal baffles, reducing dead zones and pressure drops, enhancing turbulence intensity, and further improving heat transfer efficiency. The steam generated by evaporation and the concentrated material rise to the discharge head 3. The steam is discharged from the top steam outlet 11, while the concentrated material flows out from the discharge outlet 8. Some of the material that is not fully evaporated flows back from the circulation return port 7 on the side wall of the feed head 2 through the external matching device and re-enters the heating evaporation cylinder 1 to participate in the evaporation process. The water after the high-temperature steam is liquefied slides to the bottom of the heating evaporation cylinder 1 and is finally discharged from the liquid outlet 12, realizing continuous evaporation and concentration of materials.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-circulating rising film evaporator, characterized in that, include: The heating evaporator (1), the feed end cap (2) and the discharge end cap (3) are provided. The bottom of the heating evaporator (1) is provided with the feed end cap (2) and the top of the heating evaporator (1) is provided with the discharge end cap (3). The two ends of the heating evaporator (1) are provided with two connecting flanges that are symmetrically distributed on the axis. The feed end cap (2) and the discharge end cap (3) are connected to the two ends of the heating evaporator (1) by bolts and flanges. A uniform heating component is disposed inside the heating evaporation cylinder (1), and the bottom shaft end of the uniform heating component is connected to the bottom end of the heating evaporation cylinder (1) by bolts.

2. The self-circulating rising film evaporator according to claim 1, characterized in that, The heating evaporator (1) is a hollow cylindrical structure with openings at both ends. The bottom of the side wall of the heating evaporator (1) is provided with a steam inlet (10) and a liquid outlet (12). The steam inlet (10) and the liquid outlet (12) are distributed opposite to each other. Both the steam inlet (10) and the liquid outlet (12) are connected to the interior of the heating evaporator (1). The top of the side wall of the heating evaporator (1) is provided with a steam outlet (11). The steam outlet (11) is on the same side as the steam inlet (10). The steam outlet (11) is connected to the interior of the heating evaporator (1).

3. The self-circulating rising film evaporator according to claim 2, characterized in that, The bottom shaft end of the heating evaporator (1) is provided with a connecting ring (13), and four lifting lugs (9) arranged in a ring array are welded to the side wall of the heating evaporator (1), and the lifting lugs (9) are respectively placed between the steam inlet (10) and the steam outlet (11).

4. The self-circulating rising film evaporator according to claim 1, characterized in that, The top of the feed head (2) is provided with a flange that is connected to the heating evaporation cylinder (1), and the top of the feed head (2) is an open structure. The bottom of the feed head (2) is provided with a feed port (6), and the side wall of the feed head (2) is provided with a circulation return port (7), which is connected to the inside of the feed head (2).

5. The self-circulating rising film evaporator according to claim 1, characterized in that, The bottom of the discharge end cap (3) is provided with a flange that is connected to the heating evaporation cylinder (1), the bottom of the feed end cap (2) is an open structure, and the top of the discharge end cap (3) is provided with a discharge port (8).

6. The self-circulating rising film evaporator according to claim 1, characterized in that, The uniform heating assembly includes a heating tube bundle (4) and a baffle (5), with the baffle (5) positioned inside the heating tube bundle (4).

7. The self-circulating rising film evaporator according to claim 6, characterized in that, The heating tube bundle (4) has tube plates (14) at both ends of the shaft. The bottom tube plate (14) of the heating tube bundle (4) is connected to the connecting ring (13) by the matching bolts. The heating tube bundle (4) has a set of tube bundles (15) distributed in an equal ring at equal intervals inside. The radial cross section of the tube bundles (15) is elliptical.

8. The self-circulating rising film evaporator according to claim 6, characterized in that, The two ends of the flow deflector (5) are welded to the opposite sides of the two tube sheets (14), and the flow deflector (5) is provided with a spiral plate (16). The flow deflector (5) is provided with a set of annularly distributed mating holes (17) in the axial direction. The mating holes (17) penetrate the spiral plate (16) and are mated to the tube bundle (15).

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