An integrated twin-screw feeding and fluidized bed drying of viscous material processing system

Abstract

The utility model belongs to material drying processing technical field, concretely relates to a kind of integrated double-screw feeding and fluidized bed drying's viscous material processing system, including differential speed feeding device, dynamic fixed-knife crushing device and fluidized bed that are sequentially sealed connection;The differential speed feeding device includes a group of parallelly arranged screw conveying shaft, two the screw conveying shafts rotate in same direction at differential speed;The dynamic fixed-knife crushing device includes the dynamic knife group that can high-speed rotation, the upper fixed-knife group and lower fixed-knife group being arranged in the upper and lower sides of dynamic knife group.Differential speed feeding device realizes the stable, continuous conveying of viscous material, and dynamic fixed-knife crushing device carries out online instant crushing to the caked material in conveying process, ensure that the material granularity that enters dryer is uniform and consistent, and fluidized bed carries out drying to the material after crushing.Viscous material is efficiently, stably conveyed and energy-saving dried.

Description

Technical Field

[0001] This utility model belongs to the field of material drying technology, and specifically relates to a viscous material processing system that integrates double spiral feeding and fluidized bed drying. Background Technology

[0002] Currently, the following are the main technical challenges in processing viscous materials with a moisture content of 15%-30% (such as chemical intermediates, pharmaceutical wet granules, fermentation products, etc.): 1. Difficult and unstable conveying: Conventional conveying equipment (such as single spiral, scraper, etc.) is prone to blockage and bridging due to material adhesion and agglomeration, resulting in poor conveying efficiency and stability, which affects the continuous operation of downstream drying equipment.

[0003] 2. High energy consumption in pretreatment: Material agglomeration requires an additional crushing process, increasing energy consumption and equipment investment.

[0004] 3. High energy consumption and low efficiency in drying: Due to unstable and uneven feeding, the fluidization state of the material in the fluidized bed dryer is poor, the hot air utilization rate is low, the drying time is long, and the energy consumption is significantly increased.

[0005] 4. Poor system coordination: The feeding system and the drying system are mostly designed independently, and the connection is prone to leakage and air leakage, which affects the drying efficiency and workshop environment.

[0006] Existing technologies lack an integrated solution that can effectively address the stable conveying of viscous materials and the efficient synergy between crushing and fluidized bed drying. Utility Model Content

[0007] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a viscous material processing system that integrates double spiral feeding and fluidized bed drying, aiming to effectively solve the problems of unstable conveying, easy clogging, high drying energy consumption and poor system coordination of viscous materials with high moisture content, and to achieve continuous, efficient and energy-saving drying processing.

[0008] Technical solution: To achieve the above objectives, this utility model provides a viscous material processing system integrating double-screw feeding and fluidized bed drying, including a differential feeding device, a moving and fixed blade crushing device, and a fluidized bed connected in sequence and sealed; the differential feeding device includes a set of parallel spiral conveying shafts, and the two spiral conveying shafts rotate in the same direction at a differential speed; The moving-fixed-blade crushing device includes a high-speed rotating moving blade assembly, and upper and lower fixed blade assemblies located on the upper and lower sides of the moving blade assembly. A differential speed feeding device enables stable and continuous conveying of viscous materials. The moving-fixed-blade crushing device performs online, real-time crushing of agglomerated materials during the conveying process, ensuring uniform particle size of the material entering the dryer. The fluidized bed then dries the crushed material.

[0009] Furthermore, the moving-fixed-blade crushing device is located downstream of the discharge port of the differential feeding device, and the two are sealed together by flanges or welding. The feed port of the fluidized bed is connected to the discharge port of the moving-fixed-blade crushing device, and the two are also sealed together by flanges or welding. All components are connected by welding or flanges, with no intermediate transfer links, minimizing leakage and airflow.

[0010] Furthermore, the differential feeding device is equipped with a feeding hopper at its feeding end. The rotational speed ratio of the two screw conveyor shafts is 1:0.8 to 1:0.95, and the differential feeding device contains a sensor to detect the rotational speed of the screw conveyor shafts. The shearing and kneading action of the two screw conveyor shaft blades effectively breaks down the material's adhesion, preventing bridging and clogging. The system's control system monitors the rotational speed of the screw conveyor shafts in real time and automatically adjusts the crushing frequency of the moving blade assembly to the optimal value based on the material quantity corresponding to this speed (e.g., increasing the crushing frequency when the conveying volume is large), achieving intelligent matching between feeding and crushing.

[0011] Furthermore, the moving and fixed blade crushing device also includes a housing, the moving blade assembly is disposed inside the housing via a rotating shaft, and the upper fixed blade assembly and the lower fixed blade assembly are disposed on the inner wall of the housing.

[0012] Furthermore, a screen can be detachably installed in the housing. The screen is located below the lower fixed blade assembly with a gap of 5mm between them. The screen controls the maximum particle size of the crushed material, and the 5mm gap between the lower fixed blade assembly and the screen allows for adjustment of particle size.

[0013] Furthermore, the differential feeding device also includes a housing, the screw conveyor shaft is rotatably disposed inside the housing, the housing is equipped with a drive motor, and the two screw conveyor shafts are connected to the drive motor with different numbers of transmission teeth to achieve differential rotation.

[0014] Furthermore, the feed inlet of the fluidized bed is connected to the discharge outlet of the moving and fixed blade crushing device via a sealed transition section. This sealed transition section includes an upper vertical section, a middle contraction section, and a lower guide section. The vertical section is sealed to the moving and fixed blade crushing device, and the guide section is sealed to the fluidized bed. The contraction section is inverted conical, with a set of baffles positioned opposite each other and inclined downwards below it. The guide section is conical, containing a guide grid with several downward-sloping, laterally arranged guide plates. The crushed material can be evenly, continuously, and controllably spread onto the distribution plate of the fluidized bed dryer, effectively preventing airflow from flowing back from the fluidized bed to the feeding system and causing material dust leakage.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. Significantly improved conveying stability: The double-helix differential speed design effectively solves the clogging problem of viscous materials, improves the conveying stability of wet materials, and ensures the continuous operation of the system.

[0016] 2. Significantly reduced drying energy consumption: Stable and uniform feeding and suitable material particle size (controlled by screen) greatly improve the fluidization state of the material in the fluidized bed, increase the utilization efficiency of hot air, and at the same time, the hot air temperature can be reduced and the drying time can be shortened.

[0017] 3. High degree of integration and automation: Online crushing eliminates the need for independent crushing equipment, and seamless connection reduces leakage and air leakage. The linkage control system realizes the coordinated optimization of key links such as feeding, crushing, and drying, reduces manual intervention, and improves process controllability.

[0018] 4. High efficiency and sealing: All components are sealed together. The fluidized bed and the moving and fixed blade crushing device are connected by an anti-airflow device. The crushed material can be evenly, continuously and controllably spread onto the distribution plate of the fluidized bed dryer, effectively preventing airflow from flowing back from the fluidized bed to the feeding system or causing material dust leakage.

[0019] 5. Compact and efficient structure: The integrated design reduces the equipment footprint and connection links, thereby reducing the overall system complexity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a viscous material processing system integrating double-helix feeding and fluidized bed drying according to the present invention. Figure 2 This is a schematic diagram of the differential feeding device described in this utility model; Figure 3 This is a schematic diagram of the structure of the moving and fixed blade crushing device described in this utility model; Figure 4 This is a schematic diagram of the sealing transition section described in this utility model.

[0021] In the diagram: 1-Differential feeding device, 11-Screw conveyor shaft, 12-Feed hopper, 13-Machine casing, 14-Drive motor; 2-Moving and fixed blade crushing device, 21-Moving blade group, 22-Upper fixed blade group, 23-Lower fixed blade group, 24-Shell, 25-Screen; 3- Fluidized bed; 41-Vertical section, 42-Contraction section, 43-Guide section, 44-Baffle, 45-Guide grid. Detailed Implementation

[0022] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] Example 1 like Figure 1-3 As shown, a viscous material processing system integrating double-screw feeding and fluidized bed drying includes a differential feeding device 1, a moving and fixed blade crushing device 2, and a fluidized bed 3 connected in sequence and sealed. The differential feeding device 1 includes a set of parallel spiral conveying shafts 11, and the two spiral conveying shafts 11 rotate in the same direction at a different speed. The moving and fixed blade crushing device 2 includes a moving blade assembly 21 that can rotate at high speed, and an upper fixed blade assembly 22 and a lower fixed blade assembly 23 located on the upper and lower sides of the moving blade assembly 21.

[0024] In a preferred embodiment, the moving and fixed blade crushing device 2 is located downstream of the discharge port of the differential feeding device 1, and the two are sealed together by a flange or welding. The feed port of the fluidized bed 3 is connected to the discharge port of the moving and fixed blade crushing device 2, and the two are sealed together by a flange or welding.

[0025] In a preferred embodiment, the feed end of the differential feeding device 1 is also provided with a feed hopper 12, the rotational speed ratio of the two screw conveyor shafts 11 is 1:0.8 to 1:0.95, and the differential feeding device 1 is provided with a sensor for detecting the rotational speed of the screw conveyor shafts 11.

[0026] In a preferred embodiment, the moving and fixed blade crushing device 2 further includes a housing 24, the moving blade assembly 21 is disposed inside the housing 24 via a rotating shaft, and the upper fixed blade assembly 22 and the lower fixed blade assembly 23 are disposed on the inner wall of the housing 24.

[0027] In a preferred embodiment, a screen 25 may also be detachably installed in the housing 24. The screen 25 is located below the lower fixed blade assembly 23, and the gap between the two is 5mm. The screen 25 can be selected with different specifications such as 5mm or 8mm aperture according to process requirements.

[0028] In a preferred embodiment, the differential feeding device 1 further includes a housing 13, the screw conveyor shaft 11 is rotatably disposed inside the housing 13, the housing 13 is provided with a drive motor 14, and the two screw conveyor shafts 11 are connected to the drive motor 14 with different numbers of transmission teeth.

[0029] Example 2 like Figure 4As shown, based on Embodiment 1, in this embodiment: the feed inlet of the fluidized bed 3 and the discharge outlet of the moving and fixed blade crushing device 2 are connected by a sealed transition section. The sealed transition section includes an upper vertical section 41, a middle constriction section 42, and a lower guide section 43. The vertical section 41 is sealed to the moving and fixed blade crushing device 2, and the guide section 43 is sealed to the fluidized bed 3. The constriction section 42 is inverted conical, and a set of baffles 44 are provided below the constriction section 42. The baffles 44 are opposite to each other and inclined downwards. The guide section 43 is conical, and a guide grid 45 is provided inside the guide section 43. The guide grid 45 is provided with several guide plates that are inclined downwards and arranged laterally.

[0030] The upper vertical section 41, serving as a feed buffer section, can be configured as an inverted cone shape to receive the crushed bulk material, initially buffering and eliminating the impact kinetic energy of the falling material, preventing feed blockage caused by material accumulation. The inner wall is polished to reduce material adhesion. The middle contraction section 42 gradually reduces the cross-sectional area, utilizing the "throat effect" to reduce the airflow velocity here and reduce the upward kinetic energy of the airflow. When the material falls, it is dispersed by impact with the baffles, and at the same time, the baffles form a "maze-like" seal, further blocking the backflow of airflow and preventing the airflow in the fluidized bed 3 from flowing upward. At the same time, it controls the falling speed of the material, laying the foundation for uniform material distribution. The lower guide section 43 evenly and continuously spreads the material on the distribution plate of the fluidized bed 3, avoiding local accumulation or flow deviation, and ensuring drying uniformity. The guide grid 45 set at the outlet divides the material passing through it into multiple streams, which are evenly distributed to various areas of the distribution plate.

[0031] This utility model provides an integrated double-screw feeding and fluidized bed drying system for handling viscous materials. During operation, high-moisture-content (15%-30%) viscous materials first enter the differential feeding device 1. The control system adjusts the rotation speeds of the two screw conveyor shafts 11 to N1 and N2 respectively (ensuring N1:N2 = 1:0.8~1:0.95) according to the set conveying capacity. Under shearing and kneading action, the material is stably conveyed forward to the moving and fixed blade crushing device 2. The moving blade group 21 rotates at high speed (e.g., crushing frequency 300-400 rpm), and in conjunction with the fixed blade group 22, powerfully crushes the material. The crushed material passes through a screen 25 with a set aperture to ensure qualified particle size. The qualified material is then evenly spread onto the distribution plate of the fluidized bed 3 through an optimized sealed transition section. Hot air passes from bottom to top through the distribution plate of the fluidized bed 3 to fluidize and dry the material. The dried material is discharged from the other end of the fluidized bed 3. Throughout the process, stable conveying, appropriate crushing, and uniform feeding work together to greatly improve fluidization quality and drying efficiency, while significantly reducing energy consumption.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An integrated twin-screw feeding and fluidized bed drying of cohesive material processing system, characterized by, It includes a differential feeding device (1), a moving and fixed blade crushing device (2), and a fluidized bed (3) that are sequentially sealed and connected; the differential feeding device (1) includes a set of parallel spiral conveyor shafts (11), and the two spiral conveyor shafts (11) rotate in the same direction at a different speed; The moving and fixed blade crushing device (2) includes a moving blade assembly (21) that can rotate at high speed, an upper fixed blade assembly (22) and a lower fixed blade assembly (23) located on the upper and lower sides of the moving blade assembly (21).

2. An integrated twin-screw feed and fluidized bed drying of cohesive material handling system as claimed in claim 1 wherein, The moving and fixed blade crushing device (2) is located downstream of the discharge port of the differential feeding device (1), and the two are sealed together by flange or welding. The feed port of the fluidized bed (3) is connected to the discharge port of the moving and fixed blade crushing device (2), and the two are sealed together by flange or welding.

3. An integrated twin-screw feed and fluidized bed drying of cohesive material handling system as claimed in claim 1 wherein, The differential feeding device (1) is also provided with a feeding hopper (12) at the feeding end. The speed ratio of the two screw conveyor shafts (11) is 1:0.8~1:0.

95. The differential feeding device (1) is provided with a sensor to detect the speed of the screw conveyor shaft (11).

4. The integrated twin-screw feed and fluid bed drying of cohesive material handling system of claim 1, wherein, The moving and fixed blade crushing device (2) also includes a housing (24), the moving blade group (21) is located inside the housing (24) via a rotating shaft, and the upper fixed blade group (22) and the lower fixed blade group (23) are located on the inner wall of the housing (24).

5. An integrated twin-screw feed and fluid bed drying of cohesive material handling system as claimed in claim 4 wherein, A screen (25) can also be detachably installed in the housing (24). The screen (25) is located below the lower fixed knife group (23) and the gap between the two is 5mm.

6. An integrated twin-screw feed and fluid bed drying of cohesive material handling system as claimed in claim 1, wherein, The differential feeding device (1) also includes a housing (13), the screw conveyor shaft (11) is rotatably disposed inside the housing (13), the housing (13) is provided with a drive motor (14), and the two screw conveyor shafts (11) are connected to the drive motor (14) with different transmission teeth.

7. An integrated twin-screw feed and fluid bed drying of cohesive material handling system as claimed in claim 1, wherein, The feed inlet of the fluidized bed (3) is connected to the discharge outlet of the moving and fixed blade crushing device (2) through a sealed transition section. The sealed transition section includes an upper vertical section (41), a middle contraction section (42), and a lower guide section (43). The vertical section (41) is sealed to the moving and fixed blade crushing device (2), and the guide section (43) is sealed to the fluidized bed (3).

8. An integrated twin-screw feed and fluid bed drying of viscous material handling system as claimed in claim 7, wherein, The contraction section (42) is an inverted cone shape. A set of baffles (44) is provided below the contraction section (42). The baffles (44) are arranged opposite each other and tilted downward. The guide section (43) is cone-shaped. A guide grid (45) is provided inside the guide section (43). Several guide plates with downward tilt and horizontal arrangement are provided on the guide grid (45).

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