Vacuum rotating fluidized bed

Abstract

The utility model discloses a vacuum rotating fluidized bed, which belongs to the technical field of pelletizers, and comprises a roller component, a vacuum device, a steam inlet system, a condensate water discharge system, a secondary steam treatment system and a rack component, the roller component is mounted on the rack component, and the roller component is rotatably connected with the rack component; the roller assembly comprises a rotating roller, a large material returning spiral is installed in the rotating roller, a tubular heat exchanger is installed in the large material returning spiral, a heating cavity is formed in the tubular heat exchanger and communicated with the interior of the rotating roller, and a feeding assembly is installed at the end of the rotating roller and used for conveying materials into the rotating roller. The material treatment efficiency and uniformity are remarkably improved, the device is particularly suitable for treatment of heat-sensitive materials, the quality loss of the materials in the treatment process is reduced to the maximum extent, and meanwhile the problem of environmental pollution caused by secondary steam emission is effectively solved.

Description

Technical Field

[0001] This utility model relates to a vacuum rotary fluidized bed, belonging to the field of granulator technology. Background Technology

[0002] Drying extracts from liquids is a common requirement in many industrial production processes, such as chemical, pharmaceutical, and food industries. Traditional fluidized bed equipment operates under normal pressure, which presents a series of limitations that cannot be ignored.

[0003] For heat-sensitive materials, their quality is easily affected by the high processing temperatures of traditional fluidized beds. For example, the active ingredients in pharmaceuticals may decrease, and the nutritional components of food may be lost. Moreover, atmospheric pressure fluidized beds face numerous difficulties when processing viscous materials, resulting in poor granulation and drying effects, huge energy consumption, and the secondary steam produced carries an odor, which would pollute the environment if directly released into the atmosphere. Atmospheric pressure fluidized beds can no longer meet the ever-increasing demands for high-efficiency production. In addition, traditional fluidized beds are prone to localized bed collapse when processing viscous materials, seriously affecting the stability and continuity of production.

[0004] While some improved vacuum drying equipment, such as the double-cone rotary vacuum dryer, has alleviated the drying difficulties of heat-sensitive materials to some extent, its drying efficiency is significantly lower than that of vacuum rotary fluidized bed equipment. These types of equipment cannot achieve continuous feeding and discharging, resulting in lower operating efficiency. Most existing vacuum drying equipment has a relatively simple structure and numerous design flaws, making it difficult to meet the complex requirements of modern drying processes, thus requiring significant improvement in both the efficiency and quality of material processing. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a vacuum rotary fluidized bed. Through a unique structural design, it realizes the spraying granulation and rotary fluidized drying of liquid materials with a certain viscosity in a vacuum environment, which significantly improves the material processing efficiency and uniformity. It is especially suitable for the processing of heat-sensitive materials, minimizes the quality loss of materials during the processing, and effectively solves the problem of environmental pollution caused by secondary steam emissions.

[0006] The technical solution adopted by this utility model to solve its existing problems is:

[0007] A vacuum rotary fluidized bed includes a drum assembly for fluidizing, drying, and granulating materials.

[0008] Vacuum device, connected to the roller assembly, is used to maintain the roller assembly in a vacuum state during operation;

[0009] The steam inlet system is connected to the drum assembly and is used to provide the heating steam required for the drum assembly to operate.

[0010] The condensate drainage system is connected to the drum assembly and is used to treat the condensate generated during the heat exchange process of the heating steam when the drum assembly is working.

[0011] A secondary steam treatment system is connected to the drum assembly and is used to treat the secondary steam generated when the drum assembly is working.

[0012] A frame assembly, a roller assembly mounted on the frame assembly, the roller assembly being rotatably connected to the frame assembly;

[0013] The drum assembly includes a rotating drum, inside which a return spiral is installed, and inside the return spiral is a tube heat exchanger. The tube heat exchanger has a heating chamber inside, which is connected to the inside of the rotating drum. A feeding assembly is installed at the end of the rotating drum, and the feeding assembly is used to convey materials into the rotating drum.

[0014] Preferably, the tube heat exchanger includes a shell, several tubes, and end caps installed at both ends of the shell. The tubes have a through-hole structure, and the end caps have mounting holes corresponding to each tube. The two ends of the tubes are fixed in the mounting holes of the two end caps respectively. The internal through holes of the several tubes are combined to form a heating chamber.

[0015] Preferably, the secondary steam treatment system includes a secondary steam discharge pipe and a condensation device connected to the secondary steam discharge pipe, the steam inlet system includes a steam inlet pipe, the condensate discharge system includes a second condensate discharge pipe, and the drum assembly includes an atmospheric-sealed rotary joint, one end of which is installed at one end of the rotating drum, and the other end of which is connected to the secondary steam discharge pipe, the steam-sealed rotary joint, and the first discharge hopper.

[0016] The atmospheric sealing rotary joint is equipped with a transition pipe. One end of the transition pipe is connected to one end of the steam sealing rotary joint, and the other end of the transition pipe extends into the rotating drum. The other end of the steam sealing rotary joint is connected to the steam inlet pipe and the second condensate outlet pipe.

[0017] Preferably, the steam inlet system includes a steam assembly, which includes a steam connecting pipe disposed opposite to the heat exchanger. One end of the steam connecting pipe is installed on the tube heat exchanger and communicates with the inner cavity of the shell of the tube heat exchanger. The other end of the steam connecting pipe is connected to a transition pipe.

[0018] Preferably, the condensate drainage system includes a first condensate drain pipe, a condensate outlet device, and a condensate inlet pipe. The condensate outlet device is mounted on a rotating drum and is an annular channel with a semi-circular groove cross-section. The condensate inlet pipe is located between the condensate outlet device and the shell-and-tube heat exchanger, with both ends of the condensate inlet pipe connected to the condensate outlet device and the shell-and-tube heat exchanger, respectively.

[0019] The first condensate drain pipe is installed between the condensate outlet device and the transition pipe, and the two ends of the first condensate drain pipe are respectively connected to the condensate outlet device and the transition pipe.

[0020] Preferably, the secondary steam discharge pipe is connected to a vacuum device, which is a vacuum pump.

[0021] Preferably, a power device is provided between the frame assembly and the rotating drum, and the power device drives the rotating drum to rotate on the frame assembly.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] Improving material handling efficiency: In a vacuum environment, the boiling point of materials is significantly reduced, and volatile substances such as moisture evaporate more easily, which greatly shortens the drying time. Simultaneously, the large return spiral inside the rotating drum facilitates rapid and thorough transfer of granular material from the discharge end to the feed end, allowing liquid material to be evenly sprayed onto the fluidized granular material before entering the tube heating system, further accelerating the heat transfer process and significantly improving moisture evaporation efficiency.

[0024] Ensuring uniformity of material processing: The coordinated rotation of the return spiral and the rotating drum allows the material to not only move in a circular motion within the drum, but also move back and forth inside the equipment. This effectively avoids local accumulation or uneven processing of materials during the process, ensuring a high degree of uniformity in material processing.

[0025] Suitable for heat-sensitive materials: Low-temperature processing under vacuum conditions effectively avoids the quality degradation of heat-sensitive materials caused by high temperatures, and can retain the original characteristics of materials to the greatest extent, such as the active ingredients of drugs and the nutritional components of food.

[0026] Reduce environmental pollution: The secondary steam generated during the evaporation of liquid materials can have an odor. If it is directly released into the atmosphere, it will pollute the environment. However, in the vacuum environment of this equipment, the secondary steam is absorbed into the condensate, which greatly reduces the pollution to the atmospheric environment.

[0027] High degree of automation: The control system can monitor and precisely adjust the equipment operating parameters in real time, realizing automated operation of the equipment. This not only reduces manual intervention and improves the stability and reliability of the production process, but also reduces labor intensity. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the vacuum rotating fluidized bed of this utility model;

[0029] Figure 2 This is a full sectional front view of the vacuum rotating fluidized bed of this utility model;

[0030] Figure 3 This is a three-dimensional sectional view of the vacuum rotating fluidized bed of this utility model;

[0031] Figure 4 This is a full sectional left view of the vacuum rotating fluidized bed of this utility model;

[0032] Figure 5 This is a right-side sectional view of the vacuum rotating fluidized bed of this utility model.

[0033] In the picture:

[0034] 1. Base, 2. Large gear ring, 3. Small gear, 4. Reducer, 5. Motor, 6. Drag wheel, 7. Rolling ring, 8. Hydraulic outrigger, 9. Rotary drum, 10. First condensate drain pipe, 11. Condensate outlet device, 12. Steam connection pipe, 13. Atmospheric seal rotary joint, 14. Secondary steam drain pipe, 15. Steam seal rotary joint, 16. Steam inlet pipe, 17. Condenser, 18. Vacuum pump, 19. Water collection tank, 2 0. Second condensate drain pipe; 21. First discharge bin; 22. Return feed spiral; 23. Shell and tube heat exchanger; 24. Shell and tube; 25. First automatic valve; 26. Second automatic valve; 27. Front support leg; 28. Transition pipe; 29. ​​Discharge port; 30. Condensate drain pipe; 31. Heating inlet; 32. Fluidization chamber; 34. Particle feed pipe; 35. Liquid spray gun; 36. End cap; 37. Mounting hole; 38. Shell. Detailed Implementation

[0035] This specification and claims do not distinguish components by differences in name, but by differences in function. In the description of this utility model, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the 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 this utility model, unless otherwise expressly specified and limited, terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0036] like Figures 1-5 The vacuum rotary fluidized bed shown includes a drum assembly, a vacuum device, a steam inlet system, a condensate discharge system, a secondary steam treatment system, a frame assembly, and a control system.

[0037] The roller assembly is used for fluidization, drying, and granulation of materials. The vacuum device is used to maintain the roller assembly in a vacuum state during operation. The vacuum device is connected to the roller assembly and is a vacuum pump 18. The vacuum pump 18 can quickly extract the air from the rotating roller 9 to achieve a predetermined vacuum level inside the rotating roller 9.

[0038] The steam inlet system is used to provide the heating steam required when the drum assembly is working. The steam inlet system is connected to the drum assembly. The core function of the steam inlet system is to transport the steam, which serves as a heat source, into the inside of the drum so that the heat energy can be efficiently transferred to the particulate material. The steam inlet system includes a steam inlet pipe 16, which is connected to a steam source, such as a conventional steam generator.

[0039] The condensate drainage system is used to treat the condensate generated during the heat exchange process of the heating steam when the drum assembly is working. The condensate drainage system is connected to the drum assembly.

[0040] The secondary steam treatment system is used to handle the secondary steam generated during the operation of the drum assembly. This secondary steam carries an odor, and direct release into the atmosphere would cause environmental pollution. However, in the vacuum environment of this equipment, the secondary steam is absorbed into the condensate, significantly reducing atmospheric pollution. The secondary steam treatment system is connected to the drum assembly. The system includes a secondary steam discharge pipe 14 and a condensing device connected to it. The condensing device is a condenser 17, installed at the end of the secondary steam discharge pipe 14. The condenser 17 condenses the secondary steam into a liquid. The condenser 17 is connected to a water collection tank 19, where the condensate enters and is subsequently discharged from the vacuum rotating fluidized bed. The secondary steam discharge pipe 14 is also connected to a vacuum pump 18 to remove air from the rotating drum 9.

[0041] A roller assembly is mounted on a frame assembly and is rotatably connected to the frame assembly. A power unit is provided between the frame assembly and the rotating roller 9, driving the rotating roller 9 to rotate on the frame assembly. The roller assembly includes a rotating roller 9, on the outer surface of which a large gear ring 2 and a rolling ring 7 are mounted opposite each other. The frame assembly includes a base 1, in the middle of which a small gear 3 meshes with the large gear ring 2 and a drag wheel 6 rotatably connected to the rolling ring 7 is mounted. The small gear 3 is connected to the power unit, which includes a reducer 4 and a motor 5. A hydraulic support leg 8 is hinged to the base 1 at one end, and a front support leg 27 is hinged to the base 1 at the other end. The hydraulic support leg 8 can adjust the height of one end of the rotating roller 9 so that the material inlet end is higher than the outlet end. The hydraulic support leg 8 is connected to a hydraulic device.

[0042] The drum assembly includes a rotating drum 9, which has a hollow interior. A feeding assembly is installed at one end of the rotating drum 9 to convey material into it. An atmospheric-sealed rotary joint 13 is installed at the other end of the rotating drum 9. A large return spiral 22 is installed inside the rotating drum 9. The return spiral 22 has a fast return speed; material can return from the discharge end to the feed end after one and a half rotations. The returned material moves like flowing water throughout the fluidization process, preventing the particles from sticking together. A shell-and-tube heat exchanger 23 is installed inside the large return spiral 22. The shell-and-tube heat exchanger 23 has a heating chamber that communicates with the interior of the rotating drum 9. The rotating drum 9, the large return spiral 22, the heating chamber of the shell-and-tube heat exchanger 23, and the feeding assembly work together to complete the material circulation, fluidization, and drying granulation. The rotating drum 9 is also provided with a discharge port 29, which is a pipe for discharging particulate material and washing water from the rotating drum 9 after the vacuum rotating fluidized bed has finished running.

[0043] The rotating drum 9 is also equipped with a fluidization chamber 32. The feeding assembly is located in the fluidization chamber 32 and includes a particle feed pipe 34 and a liquid spray gun 35. Particle material enters the rotating drum 9 through the particle feed pipe 34, and liquid material is sprayed onto the particle material inside the rotating drum 9 by the liquid spray gun 35. The particle feed pipe 34 is connected to a material source, and the liquid spray gun 35 is connected to a liquid material source.

[0044] The tube heat exchanger 23 includes a heating inlet 31, a shell 38, several tubes 24, and end caps 36 installed at both ends of the shell 38. The shell 38 is a hollow structure, and the several tubes 24 are arranged inside the shell 38 with a certain gap between each tube. The tubes 24 have a through-hole structure. The end caps 36 are provided with mounting holes 37 corresponding to each tube 24. The two ends of the tubes 24 are respectively fixed in the mounting holes 37 of the two end caps 36. The internal through holes of the several tubes 24 are combined to form a heating chamber.

[0045] The drum assembly includes an atmospheric-sealed rotary section 13, which is a mature existing technology product. One end of the atmospheric-sealed rotary section 13 is installed at one end of the rotating drum 9, and the other end of the atmospheric-sealed rotary section 13 is connected to a secondary steam discharge pipe 14, a steam-sealed rotary section 15, and a first discharge hopper 21. The steam-sealed rotary section 15 is a mature existing technology product. The steam-sealed rotary section 15 can ensure that steam can smoothly enter the tube heat exchanger 23 inside the rotating drum 9, and at the same time, it can ensure that the condensate in the tube heat exchanger 23 can be smoothly discharged outside the rotating drum 9. A first automatic valve 25 is installed at the upper end of the first discharge hopper 21, and a second automatic valve 26 is installed at the lower end of the first discharge hopper 21. The first automatic valve 25 and the second automatic valve 26 control the entry and exit of the dried granules into the first discharge hopper 21. The dried granules enter the atmospheric-sealed rotary joint 13 through the rotating drum 9, and then enter the first discharge hopper 21 through the atmospheric-sealed rotary joint 13 and exit through the first discharge hopper 21. The first automatic valve 25 and the second automatic valve 26 can be sealed automatic butterfly valve switches. Due to the function of the first automatic valve 25 and the second automatic valve 26, the discharge is smooth without affecting the vacuum degree inside the tank.

[0046] The condensate discharge system includes a second condensate discharge pipe 20. A transition pipe 28 is provided inside the atmospheric sealing rotary joint 13. One end of the transition pipe 28 is connected to the steam sealing rotary joint 15, and the other end of the transition pipe 28 extends into the rotating drum 9. The steam sealing rotary joint 15 is connected to the steam inlet pipe 16 and the second condensate discharge pipe 20 respectively.

[0047] The steam inlet system also includes a steam assembly, which includes a steam connecting pipe 12 arranged opposite to each other. One end of the steam connecting pipe 12 is installed on the tube heat exchanger 23, and the other end of the steam connecting pipe 12 is connected to the transition pipe 28. The steam connecting pipe 12 communicates with the inner cavity of the shell 38 of the tube heat exchanger 23. During operation, steam enters the shell 38 directly through the steam connecting pipe 12, increasing the heating space of the tube heat exchanger 23 and ensuring that each tube 24 is heated evenly, thereby making the heating of the material more uniform. When the rotating drum 9 is working, hot steam enters the steam sealing rotating section 15 through the steam inlet pipe 16, enters the transition pipe 28 through the steam sealing rotating section 15, enters the steam connecting pipe 12 through the transition pipe 28, and enters the shell 38 of the tube heat exchanger 23 through the steam connecting pipe 12. The hot steam acts directly on each tube 24.

[0048] The condensate drainage system includes a first condensate drain pipe 10, a condensate outlet device 11, and a condensate inlet pipe 30. The condensate outlet device 11 is mounted on the rotating drum 9 and is an annular channel with a semi-circular cross-section. The condensate inlet pipe 30 is positioned between the condensate outlet device 11 and the shell-and-tube heat exchanger 23, with both ends connected to the condensate outlet device 11 and the inner cavity of the shell 38 of the shell-and-tube heat exchanger 23, respectively. The first condensate drain pipe 10 is positioned between the condensate outlet device 11 and the transition pipe 28, with both ends connected to the condensate outlet device 11 and the transition pipe 28, respectively. During the operation of the rotating drum 9, the rotating drum 9 is in an inclined state. The heating steam enters the tube heat exchanger 23 for heat exchange and produces condensate. When the condensate reaches a certain water level, the rotating drum 9 rotates to a certain angle, which is an angle that is easy to discharge the condensate. The condensate first enters the condensate drain pipe 30 from the shell 38, then enters the condensate outlet device 11 from the condensate drain pipe 30, and then enters the first condensate drain pipe 10 from the condensate outlet device 11. From the first condensate drain pipe 10, it enters the steam sealing rotating section 15 through the transition pipe 28, and then is discharged through the second condensate drain pipe 20.

[0049] The drum assembly, vacuum device, steam inlet system, condensate discharge system, secondary steam treatment system, power unit on the frame assembly, and hydraulic outriggers 8 are all electrically connected to the control system, which can be a conventional PLC control system. The control system may include a controller, sensors, and an operation panel. The sensors are responsible for real-time monitoring of key parameters such as vacuum level, temperature, and pressure within the tank and transmitting this data to the controller promptly. Based on preset parameter values ​​and sensor feedback data, the controller automatically and precisely controls the operation of equipment such as the vacuum pump, drive motor, steam input, or condenser, thereby achieving fully automated operation. The operation panel provides operators with convenient command input and equipment operating status viewing functions.

[0050] The working process of a vacuum rotating fluidized bed is as follows:

[0051] 1) Vacuuming: Start vacuum pump 18. Vacuum pump 18 starts to extract air from the rotating drum 9 and gradually increases the vacuum level inside the rotating drum 9 until the vacuum level is ≥0.08MPa.

[0052] 2) Start the motor: Start the motor 5, which drives the reducer 4, which drives the pinion 3 to rotate, which in turn drives the large gear ring 2 to rotate, causing the rotating drum 9 to rotate clockwise. The speed can be adjusted by the system according to specific needs.

[0053] 3) Feeding: Granular material is drawn into the rotating drum 9 under negative pressure through the granule feed pipe 34. Due to the rotation of the rotating drum 9 and a specific tilt angle, the material enters the fluidization chamber 32 from the feed end, then enters the heating inlet 31 from the fluidization chamber 32, and then enters each tube 24 of the heating chamber from the heating inlet 31. It moves from the tube 24 to the discharge end. Under the action of the return spiral 22, the material returns to the fluidization chamber 32 from the discharge end, thus forming a closed circulation system. During this circulation process, the solute-containing liquid material is evenly sprayed onto the granular material in the fluidization chamber 32 through the liquid spray gun 35. The coordinated rotation of the return spiral 22 and the rotating drum 9 makes the material not only move in a circular motion in the rotating drum 9, but also move back and forth inside the equipment, effectively avoiding local accumulation or uneven processing of the material during the processing, and ensuring the high uniformity of material processing.

[0054] 4) Heating and condensate treatment: After the material enters the rotating drum 9, hot steam enters the steam connecting pipe 12 through the steam inlet pipe 16, and then enters the shell 38 through the steam connecting pipe 12. The steam acts on the tubes 24, thereby heating and drying the material in the tubes 24. The condensate generated in the shell 38 during the heating process is discharged from the rotating drum 9 through the condensate outlet device 11 and the second condensate discharge pipe 20.

[0055] 5) Secondary steam treatment: Secondary steam is generated during the fluidized granulation drying process in the rotary drum 9. The secondary steam enters the condenser 17 through the secondary steam discharge pipe 14 for condensation treatment. The condensed liquid is discharged to the water collection tank 19.

[0056] 6) Discharge: Under the action of the return spiral 22, liquid material is continuously sprayed onto granular material through liquid spray gun 35. As the granulation process proceeds, large particles of material will enter the atmospheric sealed rotary section 13 and then enter the first discharge bin 21. Under the control of the control system, the first automatic valve 25 and the second automatic valve 26 work together to discharge the material from the vacuum rotating fluidized bed, ensuring that the vacuum inside the rotating drum remains stable and ensuring the normal operation of the equipment.

[0057] The vacuum rotary fluidized bed of this application can efficiently and stably perform spray granulation and drying treatment on liquid materials containing high concentrations of solutes, fully meeting the diverse needs of different industries for liquid material processing, and has significant economic and social benefits.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A vacuum rotating fluidized bed, characterized in that: Includes roller assemblies for fluidization and drying granulation of materials; Vacuum device, connected to the roller assembly, is used to maintain the roller assembly in a vacuum state during operation; The steam inlet system is connected to the drum assembly and is used to provide the heating steam required for the drum assembly to operate. The condensate drainage system is connected to the drum assembly and is used to treat the condensate generated during the heat exchange process of the heating steam when the drum assembly is working. A secondary steam treatment system is connected to the drum assembly and is used to treat the secondary steam generated when the drum assembly is working. A frame assembly, a roller assembly mounted on the frame assembly, the roller assembly being rotatably connected to the frame assembly; The drum assembly includes a rotating drum (9), a return spiral (22) is installed inside the rotating drum (9), a tube heat exchanger (23) is installed inside the return spiral (22), a heating chamber is provided inside the tube heat exchanger (23), the heating chamber is connected to the inside of the rotating drum (9), and a feeding assembly is installed at the end of the rotating drum (9), the feeding assembly is used to convey materials into the rotating drum (9).

2. The vacuum rotating fluidized bed according to claim 1, characterized in that: The tube heat exchanger (23) includes a shell (38), several tubes (24) and end caps (36) installed at both ends of the shell (38). The tubes (24) have a through-hole structure. The end caps (36) are provided with mounting holes (37) corresponding to each tube (24). The two ends of the tubes (24) are respectively fixed in the mounting holes (37) of the two end caps (36). The internal through holes of the several tubes (24) are combined to form a heating chamber.

3. The vacuum rotating fluidized bed according to claim 2, characterized in that: The secondary steam treatment system includes a secondary steam discharge pipe (14) and a condensation device connected to the secondary steam discharge pipe (14). The steam inlet system includes a steam inlet pipe (16). The condensate discharge system includes a second condensate discharge pipe (20). The drum assembly includes an atmospheric sealing rotary joint (13). One end of the atmospheric sealing rotary joint (13) is installed at one end of the rotating drum (9). The other end of the atmospheric sealing rotary joint (13) is connected to the secondary steam discharge pipe (14), the steam sealing rotary joint (15), and the first discharge bin (21). The atmospheric sealing rotary joint (13) is provided with a transition pipe (28). One end of the transition pipe (28) is connected to one end of the steam sealing rotary joint (15), and the other end of the transition pipe (28) extends into the rotating drum (9). The other end of the steam sealing rotary joint (15) is connected to the steam inlet pipe (16) and the second condensate outlet pipe (20).

4. The vacuum rotating fluidized bed according to claim 3, characterized in that: The steam inlet system includes a steam assembly, which includes a steam connecting pipe (12) arranged opposite to each other. One end of the steam connecting pipe (12) is installed on the tube heat exchanger (23), and the steam connecting pipe (12) is connected to the inner cavity of the shell (38) of the tube heat exchanger (23). The other end of the steam connecting pipe (12) is connected to the transition pipe (28).

5. The vacuum rotating fluidized bed according to claim 4, characterized in that: The condensate discharge system includes a first condensate discharge pipe (10), a condensate outlet device (11), and a condensate inlet pipe (30). The condensate outlet device (11) is mounted on a rotating drum (9). The condensate outlet device (11) is an annular channel with a semi-circular groove cross-section. The condensate inlet pipe (30) is located between the condensate outlet device (11) and the shell-and-tube heat exchanger (23). The two ends of the condensate inlet pipe (30) are respectively connected to the condensate outlet device (11) and the shell-and-tube heat exchanger (23). The first condensate drain pipe (10) is located between the condensate outlet device (11) and the transition pipe (28), and the two ends of the first condensate drain pipe (10) are respectively connected to the condensate outlet device (11) and the transition pipe (28).

6. The vacuum rotating fluidized bed according to claim 3, characterized in that: The secondary steam discharge pipe (14) is connected to a vacuum device, which is a vacuum pump (18).

7. The vacuum rotating fluidized bed according to claim 1, characterized in that: A power device is provided between the frame assembly and the rotating drum (9), and the power device drives the rotating drum (9) to rotate on the frame assembly.

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