High-efficiency flow-optimized reboiler

Abstract

The utility model provides a high-efficiency flow-optimized reboiler, which relates to the technical field of chemical equipment and comprises a reboiling tower, an air outlet is arranged at the top of the reboiling tower, a liquid injection port is arranged at the top of one side of the reboiling tower, a conical separation cover is mounted at the top in the reboiling tower, isolation sieve pores are annularly arrayed at the top of the separation cover, and the separation sieve pores are communicated with the liquid injection port. According to the high-efficiency reboiler, the hole diameter of the isolation sieve hole in the center of the top of the separation cover is the smallest, the hole diameter of the isolation sieve hole in the outermost part is the largest, a heat exchange pipe is installed at the bottom, close to the separation cover, in the reboiling tower, the high-efficiency reboiler abandons a traditional single feeding mode, and fluid to be vaporized can be rapidly and evenly distributed in the tower after being injected from a liquid injection opening. Through the unique internal structural design, the occurrence of short-circuit flow and dead zones during liquid flowing is effectively avoided, and the heat and mass transfer efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a high-efficiency flow-optimized reboiler. Background Technology

[0002] A reboiler according to Chinese Patent No. CN 216062016 U. The reboiler includes a main body, an upper head, and a lower head. A top perforated plate and a bottom perforated plate are fixedly installed at the top and bottom of the main body, respectively, and connected to the upper and lower heads. Reboiler tubes are arranged between the top and bottom perforated plates, perpendicular to both plates. The reboiler also includes an anti-impact plate located inside the lower head, with several small holes for air bubbles to pass through. By adding the anti-impact plate, the corrosion rate of the bottom perforated plate is significantly reduced, greatly decreasing the frequency of shutdowns due to equipment corrosion, stabilizing production, and reducing the waste of raw materials and energy caused by start-ups and shutdowns. The temperature is more uniform throughout the reboiler, avoiding the impact of localized temperature differences caused by uneven liquid flow, improving the evaporation efficiency of the reboiler, and saving energy.

[0003] In numerous industrial sectors such as petrochemicals, pharmaceuticals, and food processing, reboilers are core equipment for achieving liquid vaporization and substance separation, and their performance directly impacts production efficiency and product quality. Currently, traditional reboilers exhibit several drawbacks during operation:

[0004] 1. Traditional reboilers have a crude internal flow channel design, frequently resulting in short-circuit flow and dead zones during liquid flow, leading to unbalanced fluid distribution and significantly reduced heat and mass transfer efficiency. In the feeding stage, the single feeding method prevents rapid and uniform liquid dispersion, easily causing localized overheating or undercooling, severely impacting the overall performance and stability of the reboiler. Furthermore, conventional separation devices are inefficient in gas-liquid separation, failing to effectively separate gas-liquid mixtures of different particle sizes, resulting in steam carrying a large amount of liquid. 2. Existing reboiler heating methods suffer from low energy utilization and uneven heating. Some equipment relies solely on single methods such as steam or electric heating, failing to meet the heating requirements under various operating conditions. Therefore, a high-efficiency, flow-optimized reboiler is needed to solve these problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency flow-optimized reboiler.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency flow-optimized reboiler, comprising a reboiler tower, wherein the top of the reboiler tower is provided with an outlet, and the top of one side of the reboiler tower is provided with a liquid injection port. A separation hood is installed at the top of the reboiler tower, the separation hood being conical in shape, and the top of the separation hood having a ring array of isolation sieve holes, the isolation sieve hole at the very center of the top of the separation hood having the smallest diameter and the isolation sieve hole at the outermost edge having the largest diameter. A heat exchange tube is installed inside the reboiler tower near the bottom of the separation hood.

[0007] Preferably, the heat exchange tube contains a high-temperature liquid, one end of the heat exchange tube has an outlet, and the other end of the heat exchange tube has an inlet.

[0008] Preferably, a collecting hopper is installed near the bottom of the heat exchange tube inside the reboiler tower, and the collecting hopper is in the shape of an inverted frustum.

[0009] Preferably, a processing cylinder is installed at the bottom of the reboiling tower, and an inner cylinder is provided inside the processing cylinder, with a microwave heating plate snapped into the bottom of the inner cylinder.

[0010] Preferably, the inner cylinder has alternating heating inclined plates, which are heated by heating wires, and the top of the heating inclined plates has a ring array of isolation protrusions.

[0011] Preferably, one end of the heating inclined plate is slidably connected to an adjusting tension plate, and a through hole is provided on one side between adjacent heating inclined plates inside the inner cylinder.

[0012] Preferably, a gap is left between the processing cylinder and the inner cylinder, and an infrared heater is installed in the gap between the processing cylinder and the inner cylinder, with the position of the infrared heater corresponding to the through hole.

[0013] Beneficial effects

[0014] In this invention, the high-efficiency reboiler abandons the traditional single-feed method. After the vaporized fluid is injected through the injection port, it can quickly achieve uniform distribution within the tower. Through a unique internal structural design, short-circuit flow and dead zones during liquid flow are effectively avoided, greatly improving heat and mass transfer efficiency. For example, the layout of the heat exchange tubes and collecting hopper guides the orderly flow of fluid, ensuring that the fluid throughout the reboiler can fully participate in the heat exchange process, fundamentally solving the problem of local overheating or undercooling, and ensuring the stability of the overall performance of the reboiler. Unlike conventional separation devices, the separation hood at the top of this reboiler plays a crucial role. Its conical structure, combined with a specially sized sieve, enables precise and efficient gas-liquid separation based on the flow rate and particle size differences of the gas-liquid mixture. High-velocity, large-particle droplets pass through the external large-aperture sieve, while slow-velocity, small-particle droplets pass through the central small-aperture sieve, effectively reducing the amount of liquid carried in the steam. This not only improves the purity of the steam and ensures the smooth operation of subsequent processes, but also reduces the risk of damage to downstream equipment and extends the service life of the equipment.

[0015] In this invention, the reboiler employs a multi-stage synergistic heating mode. Indirect heat exchange of the high-temperature liquid within the heat exchange tubes, microwave heating from the microwave heating plate, and infrared radiation heating from the infrared heater work in concert. Under different operating conditions, each heating method can be flexibly adjusted according to actual needs, avoiding energy waste. For example, during the initial heating stage, the microwave heating plate can rapidly raise the liquid temperature; in the subsequent stable heating process, the infrared heater and heat exchange tubes work together to maintain a stable heating state, significantly improving energy utilization and reducing production energy costs. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the reboiling tower of this utility model;

[0018] Figure 3 This is a structural diagram of the internal structure of the processing cylinder of this utility model;

[0019] Figure 4 This is a structural diagram of the processing cylinder of this utility model.

[0020] Legend:

[0021] 1. Reboiler; 2. Outlet; 3. Inlet; 4. Injection port; 5. Gas outlet; 6. Heat exchange tube; 7. Processing cylinder; 8. Separation hood; 9. Isolation sieve; 10. Collection hopper; 11. Inner cylinder; 12. Infrared heater; 13. Through hole; 14. Microwave heating plate; 15. Heating inclined plate; 16. Isolation protrusion; 17. Adjustment stretching plate. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0025] Reference Figure 1-4 A high-efficiency flow-optimized reboiler includes a reboiler tower 1, with an outlet 5 at the top and a liquid injection port 4 at the top of one side of the reboiler tower 1. A separation hood 8 is installed at the top inside the reboiler tower 1. The separation hood 8 is conical in shape and has a ring array of isolation sieve holes 9 at the top. The isolation sieve hole 9 at the very center of the top of the separation hood 8 has the smallest diameter, while the isolation sieve hole 9 at the outermost edge has the largest diameter. A heat exchange tube 6 is installed inside the reboiler tower 1 near the bottom of the separation hood 8.

[0026] The fluid to be vaporized is injected into the injection port 4. After being vaporized inside the tower, the gas will come out from the outlet port 5.

[0027] The heat exchange tube 6 contains a high-temperature liquid. One end of the heat exchange tube 6 is provided with a liquid outlet 2, and the other end of the heat exchange tube 6 is provided with a liquid inlet 3, so as to achieve circulation.

[0028] A collecting hopper 10 is installed inside the reboiling tower 1 near the bottom of the heat exchange tube 6. The collecting hopper 10 is in the shape of an inverted frustum.

[0029] A processing cylinder 7 is installed at the bottom of the reboiling tower 1. The processing cylinder 7 has an inner cylinder 11 inside, and a microwave heating plate 14 is snapped into the bottom of the inner cylinder 11.

[0030] Heating inclined plates 15 are staggered inside the inner cylinder 11. The heating inclined plates 15 are heated by heating wires. The top of the heating inclined plates 15 has a ring array of isolation protrusions 16.

[0031] One end of the heating inclined plate 15 is slidably connected to an adjusting tension plate 17. A through hole 13 is provided on one side between adjacent heating inclined plates 15 in the inner cylinder 11. The adjusting tension plate 17 can be stretched to adjust the gap between each layer of heating inclined plates 15.

[0032] There is a gap between the processing cylinder 7 and the inner cylinder 11. An infrared heater 12 is installed in the gap between the processing cylinder 7 and the inner cylinder 11. The infrared heater 12 is positioned corresponding to the through hole 13. The infrared heater 12 heats the fluid flowing from the upper heating plate 15 to the lower heating plate 15 through the through hole 13. In other words, it heats the fluid flowing downwards through radiation. Specific Implementation Example 2:

[0034] Reference Figure 1-4 The overall workflow is as follows:

[0035] The fluid to be vaporized is injected into the reboiler 1 through the injection port 4, where it undergoes multiple heating and vaporization processes. The vaporized gas is discharged through the outlet 5, while the unvaporized liquid is circulated within the tower. The entire process is achieved through the coordinated operation of components such as the heat exchange tube 6, microwave heating plate 14, heating inclined plate 15, and infrared heater 12, resulting in efficient flow optimization and heating vaporization.

[0036] Supplementary information on the working principles and details of each component

[0037] High-temperature liquid flows into heat exchange tube 6 through inlet 3. This tube is typically made of highly thermally conductive stainless steel, with fins added to increase the heat exchange area. While flowing inside the tube, the high-temperature liquid transfers heat to the fluid to be vaporized in reboiler 1. The cooled liquid flows out through outlet 2 and can be reheated and recycled by external heating equipment. After the fluid to be vaporized is heated, the gas-liquid mixture flows to a conical separation hood 8, whose top annular array of isolation sieve holes 9 has the smallest central aperture and the largest outer aperture. Gas-liquid mixtures with different flow rates and particle sizes tend to separate through the outer, larger aperture sieve holes, while slower-flowing, smaller particles pass through the central, smaller aperture sieve holes, achieving initial gas-liquid separation. The gas continues to rise and is discharged through outlet 5, while the liquid falls back. The falling liquid and incompletely vaporized liquid are collected by an inverted frustum-shaped collecting hopper 10, whose inclined inner wall guides the liquid flow to the processing cylinder 7.

[0038] Inside the processing cylinder 7, a microwave heating plate 14 installed at the bottom of the inner cylinder 11 generates microwaves after being powered on. Microwaves penetrate the liquid inside the inner cylinder 11, causing the liquid molecules to vibrate at high frequencies. The friction between the molecules generates heat, thus rapidly heating the liquid. The staggered heating ramps 15 inside the inner cylinder 11 are heated by heating wires. When energized, the heating wires generate heat, which is conducted to the heating ramps 15, providing direct contact heating of the liquid flowing on them. The annular array of isolation protrusions 16 at the top of the heating ramps 15 increases the residence time of the liquid on the ramps and also creates disturbance during the flow, enhancing heat transfer. An adjustable tension plate 17 at one end of the heating ramps 15 is extendable, adjustable manually or electrically, allowing the gap between each layer of heating ramps 15 to be adjusted according to the liquid flow rate and heating requirements. The infrared heater 12, located in the gap between the processing cylinder 7 and the inner cylinder 11, corresponds to the position of the through hole 13. After being powered on, the infrared heater 12 emits infrared rays, which are radiated through the through hole 13 onto the liquid flowing from the upper heating inclined plate 15 to the lower heating inclined plate 15. The liquid absorbs the energy of the infrared rays, intensifies molecular motion, and raises its temperature, thus achieving supplemental heating of the liquid during the flow process.

[0039] Through the above methods, the entire reboiling tower 1 can achieve efficient processing. The infrared heater 12 is a DR-966 model, which is a 240-volt hard-wired model with an adjustable power between 3000 watts and 6000 watts. It has a heating coverage area of ​​600 square feet and features overheat protection, manual temperature control, and an adjustable tilt head. The microwave heating plate here uses the same microwave heating method as in a microwave oven, so it will not be described in detail here. At the same time, all electronic components in the tower are waterproof and high-temperature resistant.

[0040] In summary:

[0041] 1. In this equipment, high-temperature liquid flows into the heat exchange tube 6 through the inlet 3. The tube is typically made of stainless steel with good thermal conductivity, and fins may be added to the surface to increase the heat exchange area. While flowing inside the tube, the high-temperature liquid transfers heat to the fluid to be vaporized in the reboiling tower 1. The cooled liquid flows out through the outlet 2 and can be reheated and recycled by external heating equipment. After the fluid to be vaporized is heated, the gas-liquid mixture flows towards the conical separation hood 8, whose top annular array of isolation sieve holes 9 has the smallest central aperture and the largest outer aperture. Gas-liquid mixtures with different flow rates and particle sizes tend to separate through the outer, larger aperture sieve holes, while slower-flowing, smaller particles pass through the central, smaller aperture sieve holes, achieving initial gas-liquid separation.

[0042] 2. Inside the processing cylinder 7, a microwave heating plate 14 installed at the bottom of the inner cylinder 11 generates microwaves after being powered on. Microwaves can penetrate the liquid inside the inner cylinder 11, causing the liquid molecules to vibrate at high frequencies under the influence of the microwaves. The friction between the molecules generates heat, thus rapidly heating the liquid. The alternating heating ramps 15 inside the inner cylinder 11 are heated by heating wires. When the heating wires are energized, they generate heat, which is conducted to the heating ramps 15, providing direct contact heating to the liquid flowing on them. The annular array of isolation protrusions 16 at the top of the heating ramps 15 increases the residence time of the liquid on the heating ramps 15 and also creates disturbance in the liquid flow, enhancing the heat transfer effect.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high performance flow-optimized reboiler comprising a reboil column (1), characterized in that: The top of the reboiler column (1) is provided with a gas outlet (5), the top of one side of the reboiler column (1) is provided with a liquid injection port (4), the top of the reboiler column (1) is provided with a separation cover (8), the shape of the separation cover (8) is conical, the top of the separation cover (8) is annularly arranged with isolation sieve holes (9), the most central isolation sieve hole (9) at the top of the separation cover (8) has the smallest aperture, and the outermost isolation sieve hole (9) has the largest aperture, and the bottom of the reboiler column (1) is provided with a heat exchange pipe (6) close to the separation cover (8).

2. A high efficiency flow optimized reboiler as claimed in claim 1, wherein: The inside of the heat exchange pipe (6) is used for storing high-temperature liquid, one end of the heat exchange pipe (6) is provided with a liquid outlet (2), and the other end of the heat exchange pipe (6) is provided with a liquid inlet (3).

3. A high efficiency flow optimized reboiler as claimed in claim 2, wherein: The bottom of the reboiler column (1) is provided with a collecting hopper (10) close to the heat exchange pipe (6), and the shape of the collecting hopper (10) is an inverted circular table.

4. A high efficiency flow optimized reboiler as claimed in claim 3, wherein: The bottom of the reboiler column (1) is provided with a processing cylinder (7), the inside of the processing cylinder (7) is provided with an inner cylinder (11), and the bottom of the inner cylinder (11) is clamped with a microwave heating disc (14).

5. A high efficiency flow optimized reboiler as claimed in claim 4, wherein: The inner cylinder (11) is provided with heating inclined plates (15) staggered arranged therein, the heating inclined plates (15) are heated by heating wires, and the top of the heating inclined plates (15) is annularly arranged with isolation convex columns (16).

6. A high efficiency flow optimized reboiler as claimed in claim 5 wherein: One end of the heating inclined plate (15) is slidably connected with an adjusting stretching plate (17), and one side between adjacent heating inclined plates (15) in the inner cylinder (11) is provided with a through hole (13).

7. A high efficiency flow optimized reboiler as claimed in claim 6, wherein: The processing cylinder (7) and the inner cylinder (11) are provided with a gap, an infrared heater (12) is arranged in the gap between the processing cylinder (7) and the inner cylinder (11), and the infrared heater (12) corresponds to the position of the through hole (13).

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