A heating device for a dry fluidized bed
By adopting an embedded steam ring pipe and spiral finned tube structure in the drying fluidized bed, the problems of low efficiency and fluidization dead zone in existing devices are solved, and a highly efficient material drying effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUOHE XIN YUHUA GONG EQUIP CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-09
AI Technical Summary
Existing heating devices for dry fluidized beds are inefficient when using vinyl chloride converters, and the built-in heating coils are prone to forming fluidization dead zones, affecting heat transfer capacity.
The system employs an embedded steam ring tube and spiral finned tube structure. Steam heat is transferred to the fluidized air through the spiral finned tube for primary drying, while the steam ring tube embedded in the fluidized bed performs secondary drying. This avoids adhesion on the surface of the internal heat exchanger and fully utilizes a single heating system to dry materials twice as efficiently.
It improves drying efficiency, avoids the formation of fluidization dead zones, and achieves efficient drying of materials.
Smart Images
Figure CN224340495U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of heating devices for dry fluidized beds, and particularly to a heating device for a dry fluidized bed. Background Technology
[0002] Current heating devices for fluidized bed drying require hot water heaters and vinyl chloride converters, which are less efficient than steam heating and more suitable for large-scale continuous production. Furthermore, the built-in heating coils are prone to accumulating a layer of fine powder, creating fluidization dead zones within the bed. For example, Chinese patent 202322118352.4 discloses a heating device for a fluidized bed drying system. This novel device uses a vinyl chloride converter to produce polyvinyl chloride through polymerization, heating the converted hot water to supply heat to the fluidized bed. However, when drying other substances without the heat supply from the vinyl chloride converter, it is necessary to increase the supply of hot water to the fluidized bed via a hot water circulation pump and a hot water heater. The heating coils are placed inside the fluidized bed, inevitably creating fluidization dead zones. When a layer of fine powder adheres to the surface, it significantly reduces the heat transfer capacity. Summary of the Invention
[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a heating device for drying fluidized beds. The embedded steam ring pipe can avoid the problem of adhesion in the dead corners on the surface of the internal heat exchanger. The steam heat is transferred to the fluidized air through the spiral finned tube to achieve primary drying. At the same time, the material is dried secondary by the steam ring pipe embedded in the fluidized bed, which can make full use of a single heating system to dry the material twice as efficiently.
[0004] This utility model also provides a heating device having the above-mentioned drying fluidized bed, comprising: a steam boiler, the upper surface of which is fixedly connected to a steam pipe, the steam pipe being fixedly connected to a shell, and a steam regulating valve provided on the steam pipe; a shell, the upper part of which is a fluidized bed, the lower part of which is a wind chamber, the inner wall of which is embedded with multiple layers of steam ring pipes, the steam ring pipes being fixedly connected to a steam vertical pipe, the steam vertical pipes being fixedly connected to a spiral finned tube, the spiral finned tubes being fixedly connected to the wind chamber, a fan being fixedly connected to the left surface of the wind chamber, an air inlet pipe being fixedly connected to the upper surface of the wind chamber, and an air distribution plate being fixedly connected to the upper surface of the air inlet pipe; and a condensate outlet, the condensate outlet being fixedly connected to a condensate pipe, the condensate pipe being fixedly connected to the steam ring pipe, and a drain valve provided on the condensate pipe. With the above components, the embedded steam loop avoids the problem of adhesion in the dead corners on the surface of the internal heat exchanger, and the steam heat is transferred to the fluidized air through the spiral finned tube to achieve primary drying. At the same time, the material is dried secondary by the steam loop embedded in the fluidized bed, which can make full use of a single heating system to dry the material twice as efficiently.
[0005] According to the heating device for the drying fluidized bed provided by this utility model, a feed hopper is provided on the left surface of the shell. Through the above components, materials can be continuously added into the fluidized bed.
[0006] According to the heating device for the drying fluidized bed provided by this utility model, a discharge pipe is provided at the top of the shell, and the discharge pipe is fixedly connected to a cyclone separator. Through the above components, the dried material can be collected, and the material and exhaust gas can be separated.
[0007] According to the heating device for the dry fluidized bed provided by this utility model, the steam boiler is equipped with a water level gauge. Through these components, the water level inside the boiler can be monitored at any time, and water can be continuously added to maintain a certain water level in the boiler.
[0008] According to the heating device for the drying fluidized bed provided by this utility model, the air distribution plate is provided with multiple holes. Through the above components, the airflow is evenly distributed to form a fluidized bed layer.
[0009] According to the heating device for the drying fluidized bed provided by this utility model, the air distribution plate and the air inlet pipe are sealed by flanges. These components connect the air distribution plate and the air chamber, and prevent leakage of fluidized air.
[0010] According to the heating device for the dry fluidized bed provided by this utility model, the left surface of the spiral finned tube is fixedly connected to a condensate pipe, and the right surface is fixedly connected to a steam riser. Through these components, the condensate generated during the heat exchange process can be recovered and returned to the boiler for preheating, thereby improving energy utilization.
[0011] According to the heating device for the drying fluidized bed provided by this utility model, the left surface of the fan is provided with an air inlet. Air is drawn into the air chamber for heating through the above components.
[0012] Compared with existing technologies, the heating device of this drying fluidized bed can avoid the problem of adhesion in the dead corners on the surface of the internal heat exchanger by embedding steam ring pipes. It can also transfer steam heat to fluidized air through spiral finned tubes to achieve primary drying, and then use the embedded steam ring pipes in the fluidized bed to dry the material for secondary drying. This can make full use of a single heating system to dry the material twice as efficiently. Attached Figure Description
[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0014] Figure 1 This is an overall structural diagram of the heating device for the drying fluidized bed of this utility model;
[0015] Figure 2 This is an internal structural diagram of the heating device for the drying fluidized bed of this utility model;
[0016] Figure 3This is a structural diagram of the steam pipe, steam ring pipe, steam vertical pipe, spiral finned tube, air inlet pipe, air distribution plate, and condensate pipe of the heating device for the drying fluidized bed of this utility model.
[0017] Legend:
[0018] 1. Steam boiler; 2. Steam pipe; 3. Shell; 4. Steam regulating valve; 5. Fluidized bed; 6. Air chamber; 7. Steam ring pipe; 8. Steam riser; 9. Spiral finned tube; 10. Fan; 11. Air inlet pipe; 12. Air distribution plate; 13. Condensate outlet; 14. Condensate pipe; 15. Steam trap; 16. Feed hopper; 17. Discharge pipe; 18. Cyclone separator. Detailed Implementation
[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0020] Reference Figure 1 , Figure 2 , Figure 3 This utility model provides a heating device for a drying fluidized bed, which includes: a steam boiler 1 with a steam pipe 2 fixedly connected to its upper surface; a water level gauge on the steam boiler 1; a housing 3 with the steam pipe 2 fixedly connected to its shell; a feed hopper 16 on the left surface of the housing 3; and a steam regulating valve 4 on the steam pipe 2.
[0021] Specifically, the material is poured into the feed hopper 16, the water level gauge is observed, and the water level in the steam boiler 1 is checked to see if it is at a certain height. The steam boiler 1 is started to heat water and generate steam. The steam regulating valve 4 is adjusted according to the weight of the material, and the steam enters the shell 3 from the steam pipe 2.
[0022] Reference Figure 1 , Figure 2 , Figure 3 The upper part of the shell 3 is a fluidized bed 5, and the lower part of the shell 3 is a wind chamber 6. The inner wall of the fluidized bed 5 is embedded with a multi-layer steam ring pipe 7. The steam ring pipe 7 is fixedly connected to the steam vertical pipe 8. The steam vertical pipe 8 is fixedly connected to the spiral finned pipe 9. The spiral finned pipe 9 is fixedly connected to the wind chamber 6. The left surface of the spiral finned pipe 9 is fixedly connected to the condensate pipe 14. The right surface of the spiral finned pipe 9 is fixedly connected to the steam vertical pipe 8. The left surface of the wind chamber 6 is fixedly connected to the fan 10. The left surface of the fan 10 is provided with an air inlet. The upper surface of the wind chamber 6 is fixedly connected to the air inlet pipe 11. The upper surface of the air inlet pipe 11 is fixedly connected to the air distribution plate 12. The air distribution plate 12 and the air inlet pipe 11 are sealed by a flange. The air distribution plate 12 is provided with multiple holes. The top of the shell 3 is provided with a discharge pipe 17. The discharge pipe 17 is fixedly connected to the cyclone separator 18.
[0023] Specifically, steam enters the steam riser 8 and steam ring 7 embedded in the shell 3 from the steam pipe 2, heating the air in the fluidized bed 5. Steam also enters the spiral finned tube 9 from the steam riser 8. At the same time, the blower 10 draws in filtered air into the air chamber 6. The air in the air chamber 6 is heated by the spiral finned tube 9 and then enters the air distribution plate 12 through the air inlet pipe 11. The airflow is evenly distributed through the holes on the air distribution plate 12 and enters the fluidized bed 5, forming a fluidized bed layer for drying the material. The dried material is discharged from the discharge pipe 17 and separated from the exhaust gas by the cyclone separator 18.
[0024] Reference Figure 1 , Figure 2 , Figure 3 The condensate outlet 13 is fixedly connected to the condensate pipe 14, the condensate pipe 14 is fixedly connected to the steam ring pipe 7, and the condensate pipe 14 is equipped with a steam trap 15.
[0025] Specifically, when the material in the fluidized bed 5 is drying, the condensate generated after heat exchange in the steam ring pipe 7 and the spiral finned tube 9 enters the condensate pipe 14 and is discharged through the steam trap 15.
[0026] Working principle: Material is poured into the feed hopper 16, and the steam boiler 1 is started to heat water and generate steam. The steam enters the shell 3 through the steam pipe 2, and then enters the steam riser 8 and steam ring pipe 7 embedded in the shell 3 to heat the air in the fluidized bed 5. The steam also enters the spiral finned tube 9 through the steam riser 8. At the same time, the blower 10 draws in filtered air and enters the air chamber 6. The air in the air chamber 6 is heated by the steam-heated spiral finned tube 9, and then enters the air distribution plate 12 through the air inlet pipe 11. The airflow is evenly distributed through the holes on the air distribution plate 12 and enters the fluidized bed 5, forming a fluidized bed layer for drying the material. The dried material is discharged from the discharge pipe 17 and separated from the exhaust gas by the cyclone separator 18. When the material in the fluidized bed 5 is dry, the condensate generated by the heat exchange in the steam ring pipe 7 and the spiral finned tube 9 enters the condensate pipe 14 and is discharged from the condensate outlet 13 through the drain valve 15.
Claims
1. A heating device for a dry fluidized bed, characterized in that, include: A steam boiler (1) has a steam pipe (2) fixedly connected to its upper surface. The steam pipe (2) is fixedly connected to the shell (3). A steam regulating valve (4) is provided on the steam pipe (2). The shell (3) has a fluidized bed (5) above it and a wind chamber (6) below it. The inner wall of the fluidized bed (5) is embedded with a multi-layer steam ring pipe (7). The steam ring pipe (7) is fixedly connected to a steam vertical pipe (8). The steam vertical pipe (8) is fixedly connected to a spiral finned tube (9). The spiral finned tube (9) is fixedly connected to the wind chamber (6). The left surface of the wind chamber (6) is fixedly connected to a fan (10). The upper surface of the wind chamber (6) is fixedly connected to an air inlet pipe (11). The upper surface of the air inlet pipe (11) is fixedly connected to an air distribution plate (12). A condensate outlet (13) is fixedly connected to a condensate pipe (14), which is fixedly connected to a steam ring pipe (7). A steam trap (15) is provided on the condensate pipe (14).
2. The heating device for a drying fluidized bed according to claim 1, characterized in that, The left surface of the shell (3) is provided with a feed hopper (16).
3. The heating device for a drying fluidized bed according to claim 1, characterized in that, The top of the housing (3) is provided with a discharge pipe (17), which is fixedly connected to the cyclone separator (18).
4. The heating device for a drying fluidized bed according to claim 1, characterized in that, The steam boiler (1) is equipped with a water level gauge.
5. The heating device for a drying fluidized bed according to claim 1, characterized in that, The air distribution plate (12) has multiple holes.
6. The heating device for a drying fluidized bed according to claim 1, characterized in that, The air distribution plate (12) and the air inlet pipe (11) are sealed by flanges.
7. The heating device for a drying fluidized bed according to claim 1, characterized in that, The left surface of the spiral finned tube (9) is fixedly connected to the condensate pipe (14), and the right surface is fixedly connected to the steam riser (8).
8. The heating device for a drying fluidized bed according to claim 1, characterized in that, The fan (10) has an air inlet on its left surface.