A drum dryer cooling machine

Abstract

This utility model discloses a drum dryer and cooler, including a drum assembly. One end of the drum assembly has a settling chamber with a feeding port at the bottom and a suction port at the top. The other end of the drum has a discharge chamber. A central hot air duct is located near the center of the discharge end of the drum. A hot air inlet is located at the center of the outer end plate of the discharge chamber, connecting with the inlet of the central hot air duct. A cold air inlet is located at the upper part of the outer end plate of the discharge chamber. The central hot air duct extends to one-third of the depth of the drum. A baffle plate is located at the outlet of the central hot air duct at intervals to diffuse the hot air. After diffusion, the hot air mixes with cold air to form a drying zone. The area from the outer periphery of the central hot air duct to the discharge end is a pure cold air cooling zone. This drum dryer and cooler can improve the uniformity of drying and the flowability of the material, reduce mechanical damage to fructose particles, and lower equipment manufacturing and maintenance costs.

Description

Technical Field

[0001] This utility model relates to a fructose granule drying device, and more particularly to a drum dryer and cooler, belonging to the technical field of drying and cooling equipment. It can be used for drying and cooling fructose granules after starch or sucrose raw materials have undergone isomerization and chromatographic separation. Background Technology

[0002] As a high-value-added sugar product, crystalline fructose's drying and cooling process must meet the following requirements:

[0003] - Low temperature protection: Fructose is highly heat-sensitive, and the drying temperature must be ≤45℃ to avoid caramelization or clumping;

[0004] - Precise humidity control: The moisture content of the finished product must be ≤0.1% to meet food-grade standards;

[0005] - High efficiency and energy saving: Traditional fluidized bed equipment has high energy consumption (such as vibrating fluidized bed which requires a multi-stage dust removal system), and the split drying-cooling process increases equipment cost and floor space.

[0006] The current mainstream technology is the vibrating fluidized bed dryer, which adopts a drying-cooling series design, but it has the following limitations:

[0007] - Complex structure: It requires the combination of tongue-shaped holes and straight hole bed plates to balance material flow and residence time;

[0008] - Dust control is difficult: relying on cyclone separators and water film dust collectors to recover fine powder results in high maintenance costs;

[0009] - Damage to materials: Severe vibration may damage the crystal structure and affect the integrity of the finished product. Utility Model Content

[0010] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0011] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0012] The purpose of this invention is to overcome the problems existing in the prior art and provide a drum dryer and cooler that can improve the uniformity of drying and the flowability of materials, reduce mechanical damage to fructose particles, and lower equipment manufacturing and maintenance costs.

[0013] To solve the above technical problems, this utility model provides a drum dryer and cooler, including a drum assembly. One end of the drum assembly has a suction settling chamber with a feeding port at the bottom and a suction port at the top. The other end of the drum has a discharge chamber. A central hot air pipe is located near the center of the discharge end of the drum. A hot air inlet is located at the center of the outer end plate of the discharge chamber and connects to the inlet of the central hot air pipe. A cold air inlet is located at the upper part of the outer end plate of the discharge chamber.

[0014] As an improvement of this utility model, the central hot air pipe extends to one-third of the depth of the cylinder, and the outlet of the central hot air pipe is provided with a port baffle plate at a certain distance to allow the hot air to diffuse; after the hot air diffuses, it mixes with the cold air to form a drying zone, and the outer periphery of the central hot air pipe to the discharge end is a pure cold air cooling zone.

[0015] As a further improvement of this utility model, the discharge chamber is connected to the cylinder through a discharge end air-sealing device. The discharge end air-sealing device includes: two annular end plates that enclose and form a sealing chamber; a sealing chamber rib welded between the two annular end plates; a sealing gas inlet located on the outer peripheral wall of the sealing chamber; a cylinder gasket welded to the outer wall of the cylinder and opposite to the annular end plates; a sealing end plate consisting of multiple pieces that are spliced ​​together to cover the annular opening on the inner circumference of the annular end plate, with a 1-2mm venting gap between it and the cylinder gasket; and a sealing pressure ring that presses and fixes the sealing end plate to the annular end plate.

[0016] As a further improvement of this utility model, the exhaust settling chamber is connected to the feed end of the cylinder through a feed end air-tight device.

[0017] As a further improvement of this utility model, the inner cavity of the discharge chamber is provided with a cold air guide plate at the position corresponding to the cold air inlet to diffuse the cold air.

[0018] As a further improvement of this utility model, the inner wall of the cylinder is provided with a plurality of lifting plates arranged along a spiral line, and the outer edge of each lifting plate is provided with serrations, and the serration width near the feed end is greater than the serration width near the discharge end.

[0019] As a further improvement of this utility model, the feed end of the cylinder is higher than the discharge end; the bottom plate of the exhaust settling chamber is inclined at a 45° angle to the axis of the cylinder, and the top is higher than the highest point of the cylinder.

[0020] As a further improvement of this utility model, the roller assembly also includes a large toothed ring and two rolling rings fixed on the outer periphery of the cylinder body. The large toothed ring is located in the middle of the cylinder body, and the two rolling rings are close to both ends of the cylinder body.

[0021] As a further improvement of this utility model, the cylinder is driven by a drive device, which includes a geared motor, a coupling, a bearing housing, a pinion, and a drive mounting base. The geared motor is connected to the pinion through the coupling, and the pinion meshes with the large gear ring to form a two-stage reduction transmission.

[0022] As a further improvement of this utility model, the rolling rings are respectively supported on the roller assembly and roll, the bottom of the roller assembly is supported on the roller mounting base, and the roller assembly is provided with a stop roller assembly on both sides for limiting the axial displacement of the cylinder.

[0023] Compared to the prior art, the advantages or beneficial effects of the embodiments of this application include at least the following:

[0024] 1. Integrated drum design: The single drum integrates drying and cooling functions, enhances drying capacity through a central pipeline, and achieves continuous processing through segmented temperature control (high temperature evaporation in the front section and low temperature cooling in the back section). Material flow and residence time can be easily controlled by motor frequency conversion.

[0025] 2. Innovatively, a gas seal is used between the drum body and the inlet and outlet hoppers to improve the sealing performance. An external fan provides additional air pressure to the gas seal device to achieve a micro-positive pressure gas seal, completely blocking the risk of sugar powder leakage. It is low in cost, easy to maintain, and has a long service life.

[0026] 3. The gradient tooth height design of the serrated lifting plate can not only break up sugar granule clumps, making the material more effectively turned over, increasing drying uniformity, improving material flowability, but also reduce mechanical damage to fructose granules.

[0027] 4. Reduce costs, increase efficiency, and improve quality: The integrated roller solution enables continuous drying and cooling, increasing production capacity by 20%; optimized plate lifting ensures drying uniformity error of <5% and guarantees product particle integrity of >95%. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein:

[0029] Figure 1 This is a front view of the drum dryer and cooler of this utility model;

[0030] Figure 2 This is a front sectional view of the drum dryer and cooler of this utility model;

[0031] Figure 3 This is a perspective view of the central hot air duct of this utility model;

[0032] Figure 4 This is a cross-sectional view of the air-tight device at the discharge end in this utility model;

[0033] Figure 5 This is a perspective view of the copying plate in this utility model.

[0034] Reference numerals: 1. Drive unit; 1a. Gear motor; 1b. Coupling; 1c. Bearing housing; 1d. Pinion; 1e. Drive mounting base;

[0035] 2. Roller assembly; 2a. Large gear ring; 2b. Cylinder body; 2c. Roller ring; 2d. Lifting plate; 2e. Central hot air duct; 2e1. Radial support; 2e2. Port baffle;

[0036] 3. Ventilation settling chamber; 3a. Settling chamber support legs; 3b. Feed end angle adjustment device; 3c. Feed end airtight device;

[0037] 4. Discharge chamber; 4a. Main body of discharge chamber; 4b. Cold air inlet; 4c. Hot air inlet; 4d. Discharge end angle adjustment device; 4e. Discharge end support leg; 4f. Discharge port; 4h. Discharge end air sealing device; 4h1. Sealing gas inlet; 4h2. Annular end plate; 4h3. Sealing chamber rib; 4h4. Sealing end plate; 4h5. Sealing pressure ring; 4h6. Cylinder gasket; 4g. Cold air guide plate;

[0038] 5. Roller support device; 5a. Roller support assembly; 5b. Shielding roller assembly; 5c. Roller support mounting base. Detailed Implementation

[0039] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0040] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0042] like Figures 1 to 5 As shown, the drum dryer and cooler of this utility model includes a drive device 1, a drum assembly 2, an exhaust settling chamber 3, a discharge chamber 4, and a support roller device 5. The drive device 1 includes a geared motor 1a, a coupling 1b, a bearing seat 1c, a pinion 1d, and a drive mounting base 1e. The geared motor 1a forms a first-stage reduction transmission through the coupling 1b and the pinion 1c. The pinion 1c and the large gear ring 2a form a second-stage reduction transmission to drive the drum assembly 2 to rotate.

[0043] The roller assembly 2 includes a large gear ring 2a, a cylinder 2b, a rolling ring 2c, a lifting plate 2d, and a central hot air pipe 2e. The outer circumferences of both ends of the central hot air pipe 2e are supported on the inner wall of the cylinder 2b by radial brackets 2e1 and are coaxial with the cylinder 2b. The inner port of the central hot air pipe 2e is provided with port baffles 2e2 at intervals. The circumference of the port baffles 2e2 is fixed to the inner port of the central hot air pipe 2e by multiple axial connections. The hot air flowing out from the inner port of the central hot air pipe 2e is blocked by the port baffles 2e2 and overflows to the surroundings. After mixing with the cold air, the temperature drops and they flow together towards the feed end to dry the material.

[0044] Multiple lifting plates 2d are evenly arranged on the inner wall of the cylinder 2b. These plates lift the material from the bottom, carry it to a higher position, and scatter it downwards, ensuring full contact with the drying air. As the material is continuously lifted, it gradually moves towards the discharge end. The outer edges of the lifting plates 2d are serrated to facilitate the breaking up of clumps of sugar powder. Because the material near the feed end is wetter and more prone to clumping, the width of the serrated edge of the lifting plate 2d near the feed end is greater than the width at the other end, allowing the serrations to embed more deeply into the easily clumped sugar powder.

[0045] The roller assembly 2 has a 1.15° inclination angle with the ground, and the feed end is higher than the discharge end, which facilitates the movement of materials to the discharge end.

[0046] The exhaust settling chamber 3 is supported on settling chamber legs 3a, and the bottom plate of the exhaust settling chamber is inclined at an angle of approximately 45° to the axis of the cylinder. A feed inlet is provided on the inclined bottom plate, which connects to the outlet of the screw feeder. Symmetrical feed end angle adjustment devices 3b are provided on both sides of the exhaust settling chamber 3 to facilitate adjustment of the angle between the exhaust settling chamber 3 and the axis of the cylinder.

[0047] The top of the exhaust settling chamber 3 is equipped with a suction port for extracting the humidified mixed air. The top of the exhaust settling chamber 3 is higher than the highest point of the cylinder 2b, which facilitates the full settling of the sugar powder and prevents the powder from being drawn out with the airflow. The right side of the exhaust settling chamber 3 is sealed to the left port of the cylinder 2b through the inlet end air-sealing device 3c.

[0048] The discharge chamber 4 includes a discharge chamber body 4a, a cold air inlet 4b, a hot air inlet 4c, a discharge end angle adjustment device 4d, a discharge end support leg 4e, a discharge port 4f, a discharge end airtight device 4h, and a cold air guide plate 4g.

[0049] The discharge chamber body 4a is supported on the discharge end support leg 4e. The discharge end angle adjustment device 4d is provided on both sides of the discharge chamber body 4a to facilitate precise adjustment of the tilt angle of the discharge chamber body 4a, so that the discharge chamber body 4a and the cylinder 2b are coaxial.

[0050] The hot air inlet 4c is located at the center of the right end face of the main body 4a of the discharge chamber, and is connected to the right end of the central hot air pipe 2e. The cold air inlet 4b is located above the hot air inlet 4c, and a cold air guide plate 4g is provided inside the cylinder to guide the cold air to the entire cross-section of the cylinder. The cold air guide plate 4g can be a pair of bent plates, the tops of which are welded to the top wall of the cylinder and extend vertically downward to the lower edge of the cold air inlet 4b. The side facing the feed end has a V-shaped opening in the front-to-back direction to diffuse the cold air.

[0051] The roller support device 5 includes a roller support assembly 5a, a baffle roller assembly 5b, and a roller support mounting base 5c. The roller assembly 2 rotates freely under the support of the roller support device 5 and maintains its axial position under the action of the baffle roller assembly 5b. It forms an air seal with the exhaust settling chamber 3 and the discharge chamber 4 under the action of the inlet end air seal device 3c and the outlet end air seal device 4h to prevent sugar powder leakage.

[0052] Hot air enters the central hot air duct 2e through hot air inlet 4c and reaches one-third of the depth of the cylindrical assembly 2. Due to the action of the port baffle 2e2, it is evenly dispersed throughout the body and then flows towards the exhaust settling chamber 3. Cold air enters the interior of the cylindrical assembly 2 through cold air inlet 4b and is evenly dispersed inside the cylinder by the action of the cold air guide plate 4g. Due to the exhaust function of the exhaust settling chamber 3, the cold air also moves towards the feed end and mixes with the hot air at the outlet of the central hot air duct 2e. The first two-thirds of the cylindrical assembly 2 is a mixture of hot and cold air, forming a drying zone; the last one-third is pure cold air, forming a cooling zone.

[0053] Crystallized fructose is fed into the drum assembly 2 from the bottom plate of the exhaust settling chamber by a screw feeder. Under the action of the tilt angle and rotation of the drum assembly 2, it is conveyed and spread by the lifting plate 2d to improve drying efficiency and prevent clumping. It is dried in the drying area of ​​the drum assembly 2 and then enters the cooling area. The material temperature begins to drop. After reaching the preset residence time and moisture requirements, it is finally discharged from the discharge port 4f at the bottom of the discharge chamber 4.

[0054] The diameter of the discharge chamber body 4a is larger than the diameter of the cylinder 2b. The right end of the cylinder 2b is inserted into the left port of the discharge chamber body 4a. The connection is sealed by the discharge end air sealing device 4h. The discharge end air sealing device 4h includes a sealing chamber formed by two annular end plates 4h2. Multiple sealing chamber stiffeners 4h3 are welded between the two annular end plates 4h2 to improve strength. The outer peripheral wall of the sealing chamber is provided with a sealing gas inlet 4h1. Cylinder gaskets 4h6 are fitted and welded to the outer wall of cylinder 2b and the annular end plate 4h2 respectively. The outer periphery of the two annular end plates 4h2 is welded to the inner wall of the discharge chamber body 4a. The annular opening between the inner periphery of the two annular end plates 4h2 and the cylinder gaskets 4h6 is covered with sealing end plates 4h4. The sealing end plates 4h4 are composed of multiple pieces spliced ​​together. For example, one sealing end plate 4h4 is set every 30°. There is a stop between adjacent sealing end plates 4h4 to overlap each other. A 1-2mm venting gap is left between the inner periphery of each sealing end plate 4h4 and the cylinder gaskets 4h6. The sealing pressure ring 4h5 presses on the outer periphery of each sealing end plate 4h4 to fix each sealing end plate 4h4 on the annular end plate 4h2.

[0055] The sealing gas enters the sealing chamber through the sealing gas inlet 4h1. Due to the presence of the sealing end plate 4h4, a slight positive pressure is formed in the sealing chamber, and it leaks slightly outward from the gap between each sealing end plate 4h4 and the cylinder gasket 4h6. This can prevent external dust from entering the cylinder and sugar powder from leaking out, thereby improving product quality.

[0056] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A drum dryer and cooler, comprising a drum assembly (2), wherein one end of the drum body (2b) of the drum assembly (2) is provided with a suction settling chamber (3), the bottom of the suction settling chamber (3) is provided with a feeding port, the top of the suction settling chamber (3) is provided with a suction port, and the other end of the drum body (2b) is provided with a discharge chamber (4), characterized in that: The cylinder (2b) has a central hot air pipe (2e) near the discharge end. The discharge chamber (4) has a hot air inlet (4c) at the center of the outer end plate that connects with the inlet of the central hot air pipe (2e). The discharge chamber (4) has a cold air inlet (4b) at the upper part of the outer end plate.

2. The drum dryer and cooler according to claim 1, characterized in that: The central hot air duct (2e) extends to one-third of the depth inside the cylinder (2b). The outlet of the central hot air duct (2e) is provided with a port baffle (2e2) at intervals to allow the hot air to diffuse. After the hot air diffuses, it mixes with the cold air to form a drying zone. The outer periphery of the central hot air duct (2e) to the discharge end is a pure cold air cooling zone.

3. The drum dryer and cooler according to claim 1, characterized in that: The discharge chamber (4) is connected to the cylinder (2b) via a discharge end air-sealing device (4h), the discharge end air-sealing device (4h) comprising: Two annular end plates (4h2) together form a sealed chamber; The sealing chamber stiffener (4h3) is welded between the two annular end plates (4h2); The sealed gas inlet (4h1) is located on the outer perimeter wall of the sealed chamber. The cylinder gasket (4h6) is welded to the outer wall of the cylinder (2b) and is opposite to the annular end plate (4h2); The sealing end plate (4h4) is made of multiple pieces spliced ​​together to cover the annular opening on the inner circumference of the annular end plate (4h2), and a 1-2mm venting gap is left between it and the cylinder gasket ring (4h6). The sealing ring (4h5) presses and fixes the sealing end plate (4h4) to the annular end plate (4h2).

4. The drum dryer and cooler according to claim 1, characterized in that: The exhaust settling chamber (3) is connected to the feed end of the cylinder (2b) through the feed end air-tight device (3c).

5. The drum dryer and cooler according to claim 1, characterized in that: The inner cavity of the discharge chamber (4) is provided with a cold air guide plate (4g) at the corresponding position of the cold air inlet (4b) to diffuse the cold air.

6. The drum dryer and cooler according to claim 1, characterized in that: The inner wall of the cylinder (2b) is provided with a plurality of lifting plates (2d) arranged along a spiral line. Each lifting plate (2d) has serrations on its outer edge, and the serrations near the feed end are wider than the serrations near the discharge end.

7. The drum dryer and cooler according to claim 1, characterized in that: The feed end of the cylinder (2b) is higher than the discharge end; the bottom plate of the exhaust settling chamber (3) is inclined at a 45° angle to the axis of the cylinder, and the top is higher than the highest point of the cylinder (2b).

8. The drum dryer and cooler according to claim 1, characterized in that: The roller assembly (2) also includes a large gear ring (2a) and two rolling rings (2c) fixed on the outer periphery of the cylinder (2b). The large gear ring (2a) is located in the middle of the cylinder (2b), and the two rolling rings (2c) are close to both ends of the cylinder (2b).

9. The drum dryer and cooler according to claim 8, characterized in that: The cylinder (2b) is driven by a drive device (1), which includes a geared motor (1a), a coupling (1b), a bearing housing (1c), a pinion (1d), and a drive mounting base (1e). The geared motor (1a) is connected to the pinion (1d) through the coupling (1b), and the pinion (1d) meshes with the large gear ring (2a) to form a two-stage reduction transmission.

10. The drum dryer and cooler according to claim 8, characterized in that: The rolling rings (2c) are supported on the roller assembly (5a) and the bottom of the roller assembly (5a) is supported on the roller mounting base (5c). The roller assembly (5a) is provided with a stop roller assembly (5b) on both sides to limit the axial displacement of the cylinder (2b).

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