Boiling dryer with easy cleaning

Abstract

This utility model belongs to the technical field of drying equipment, and particularly relates to a fluidized bed dryer that is easy to clean. The device includes: a drying drum, the interior of which is suitable for drying materials; at least one stirring column disposed inside the drying drum, and the stirring column having a plurality of vents along its circumference; wherein, an adjusting column is rotatably disposed inside the stirring column, and the adjusting column has a plurality of blocking blocks along its circumference; and, when cleaning the inner wall of the drying drum, the adjusting column rotates so that the blocking blocks block the vents along the circumference of the stirring column, thereby allowing air to blow through the vents towards the inner wall of the drying drum to clean the material adhering to the inner wall of the drying drum. By setting an adjusting column inside the stirring column and controlling the rotation of the adjusting column, during material drying, the vents of the stirring column are fully open; during cleaning the drying drum, most of the vents are blocked, and the vents towards the inner wall of the drying drum are reduced in size, forming an air knife, which rotates with the stirring column to clean the inner wall of the drying drum.

Description

Technical Field

[0001] This utility model belongs to the field of drying equipment technology, and in particular relates to a fluidized bed dryer that is easy to clean. Background Technology

[0002] A fluidized bed dryer, also known as a boiling dryer, is a device that uses fluidization technology to efficiently dry wet granular, powdery, or paste-like materials. Its core principle is to allow hot air (or other inert gas) to pass through the material layer at a specific velocity, causing solid particles to suspend in the airflow and exhibit a state similar to "boiling," thereby achieving a large contact area and efficient heat and mass transfer between the gas and solid phases.

[0003] However, when drying viscous materials in a fluidized bed dryer, the hot air blows the material up, and the material tends to stick to the inner wall of the dryer. Since the fluidized bed dryer needs to maintain a fluidized state, high-power fans are usually not used, which makes it difficult to remove the sticky material. Once it reaches a certain level, the dryer must be shut down for maintenance and cleaning.

[0004] Therefore, there is an urgent need to design a fluidized bed dryer that is easy to clean in order to solve the technical problem of viscous materials adhering to the inner wall of the dryer and being difficult to remove.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] This disclosure provides at least one example of a fluidized bed dryer that is easy to clean.

[0007] In a first aspect, embodiments of this disclosure provide a fluidized bed dryer that is easy to clean, comprising: a drying drum, the interior of which is suitable for drying materials;

[0008] At least one stirring column is placed inside the drying tank, and the stirring column has several pores along its circumference;

[0009] The stirring column is equipped with an adjusting column that rotates inside, and the adjusting column has several blocking blocks around its circumference.

[0010] Additionally, when cleaning the inner wall of the drying drum, the adjusting column is rotated so that the blocking block blocks the circumferential air holes of the stirring column, allowing air to be blown towards the inner wall of the drying drum to clean the material adhering to the inner wall of the drying drum.

[0011] In one alternative embodiment, the inner bottom wall of the stirring column has an inclined groove;

[0012] The bottom of the adjusting column has a guide contact block;

[0013] The guide contact block is fitted with the inclined slide groove.

[0014] In one alternative embodiment, the bottom of the adjusting column has a cooperating spring, one end of which abuts against the adjusting column and the other end of which is connected to the stirring column.

[0015] In one optional embodiment, the drying drum has a rotating shaft, and the stirring column is connected to and communicates with the rotating shaft;

[0016] One end of the rotating shaft is rotatably connected to the vent pipe.

[0017] In one alternative embodiment, the drying drum has a transmission mechanism, and the rotating shaft is connected to the transmission mechanism for transmission.

[0018] In one alternative embodiment, the top of the regulating column has an extension rod that extends through the stirring column;

[0019] The top of the extension rod has an adjustment ring, and the end of the extension rod is inserted into the adjustment ring.

[0020] In one optional embodiment, the drying barrel is provided with a plurality of cleaning cylinders in the circumferential direction, and the movable end of the cleaning cylinder is inserted into the drying barrel.

[0021] The adjusting ring has a lifting slope on the side facing the moving end of the cleaning cylinder.

[0022] In one optional embodiment, the side wall of the drying drum has a feed inlet and a discharge outlet, with the feed inlet located above the discharge outlet;

[0023] A filter plate is located above the feed inlet, and the filter plate is located above the stirring column.

[0024] Below the discharge port is an air distribution plate.

[0025] In one optional embodiment, an air inlet pipe is provided below the air distribution plate, and an exhaust cap is provided at the end of the air inlet pipe, with the exhaust cap being rotatably connected to the air inlet pipe.

[0026] The beneficial effect of this utility model is that by setting an adjusting column inside the stirring column and controlling the rotation of the adjusting column, the air holes of the stirring column are fully opened when drying materials, and most of the air holes of the stirring column are covered when cleaning the drying barrel, and the air holes facing the inner wall of the drying barrel are reduced to form an air knife, which rotates with the stirring column to clean the inner wall of the drying barrel.

[0027] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained in the structures particularly pointed out in the description, claims, and drawings.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 A cross-sectional view of a fluidized bed dryer that is easy to clean, provided as an embodiment of this disclosure;

[0031] Figure 2 This is a schematic diagram of the structure of a stirring column provided in an embodiment of the present disclosure;

[0032] Figure 3 A cross-sectional view of a stirring column provided in an embodiment of this disclosure;

[0033] Figure 4 This is a schematic diagram illustrating the positional relationship between a guide contact block and an inclined slide groove, provided in an embodiment of this disclosure.

[0034] Figure 5 This is a schematic diagram of the structure of an adjusting column provided in an embodiment of the present disclosure.

[0035] In the picture:

[0036] 1. Drying drum; 11. Transmission mechanism; 12. Cleaning cylinder; 13. Feed inlet; 14. Discharge outlet; 15. Filter plate; 16. Air distribution plate; 17. Air inlet pipe; 18. Exhaust cap;

[0037] 2. Stirring column; 21. Air pores; 22. Inclined chute;

[0038] 3. Adjusting column; 31. Blocking block; 32. Guide contact block; 33. Matching spring; 34. Extension rod; 35. Adjusting ring; 36. Lifting ramp;

[0039] 4. Shaft; 43. Vent pipe. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] Research has found that when drying viscous materials in a fluidized bed dryer, the hot air blows the material up, and the material tends to stick to the inner wall of the dryer. Because the fluidized bed dryer needs to maintain a fluidized state, high-power fans are usually not used, which makes it difficult to remove the sticky material. Once it reaches a certain level, the dryer must be shut down for maintenance and cleaning.

[0042] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered as the inventor's contribution to this disclosure.

[0043] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the embodiments and features described below can be combined with each other. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] Based on the above research, and referring to Figure 1 This disclosure provides an easy-to-clean fluidized bed dryer, comprising: a drying drum 1 mounted on a frame, and the drying drum 1 having an internal cavity for drying materials. An air inlet pipe 17 is connected to the bottom of the drying drum 1, through which hot air enters the drying drum 1 to dry the materials within the cavity. Simultaneously, the side wall of the drying drum 1 has a feed inlet 13 and a discharge outlet 14, with the feed inlet 13 located above the discharge outlet 14, allowing materials to enter the drying drum 1 through the feed inlet 13 and exit through the discharge outlet 14.

[0046] Reference Figure 1 In at least one embodiment, the cavity is located in the middle part inside the drying barrel 1, and the air outlet of the air inlet pipe 17 is located at the bottom of the cavity. The portion of the air inlet pipe 17 located outside the drying barrel 1 has a branch to form a vent pipe 43, which extends to the top of the wall. That is, the air inlet pipe 17 and the vent pipe respectively introduce hot air into the cavity from the upper and lower sides.

[0047] Reference Figure 1 In at least one embodiment, a distribution plate 16 is provided below the discharge port 14. Simultaneously, an exhaust cap 18 is provided at the end of the air inlet pipe 17, and the exhaust cap 18 is rotatably connected to the air inlet pipe 17. The exhaust cap 18 is circumferentially provided with a plurality of air jet holes 21, with the outlets of each air jet hole 21 facing the same direction, so that when air is supplied from the air inlet pipe 17 to the exhaust cap 18, the gas is ejected through the exhaust cap 18, causing the exhaust cap 18 to rotate and thus forming a cyclone of hot air.

[0048] Reference Figure 1 In at least one embodiment, an air distribution plate 16 is provided between the air inlet pipe 17 and the cavity. The air distribution plate 16 has a large number of micropores to allow hot air to pass through, so that the airflow can pass through and block the powder material.

[0049] Reference Figure 1 In at least one embodiment, a filter plate 15 is provided between the vent pipe 43 and the cavity. The filter plate 15 is also provided with a large number of micropores to allow hot air to pass through, so that the airflow can pass through and block the powder material.

[0050] With the above setup, when drying materials, the materials are fed into the inlet 13, and the inlet 13 and outlet 14 are sealed. Hot air enters the cavity from the exhaust cap 18 through the air distribution plate 16 to make the materials dry in a fluidized state. Then the gas continues to be discharged upwards from the drying barrel 1 through the filter plate 15.

[0051] Reference Figure 1 In at least one embodiment, the drying drum 1 has a rotating shaft 4, which is hollow inside and has one end rotatably connected to a vent pipe 43. Preferably, a rotary joint is installed between the ends of the rotating shaft 4 and the vent pipe 43 to ensure that the rotation of the rotating shaft 4 does not affect the vent pipe 43. Simultaneously, the drying drum 1 has a transmission mechanism 11, which is drively connected to the rotating shaft 4. Preferably, the transmission mechanism 11 consists of a motor and a gear set. The gear set includes two helical gears, which are respectively mounted on the rotating shaft 4 and the output shaft of the motor. The two helical gears are meshed, thereby enabling the rotating shaft 4 to rotate via the helical gears when the motor starts.

[0052] Reference Figure 2 In at least one embodiment, the drying chamber 1 has at least one stirring column 2, preferably two, and the stirring column 2 has a plurality of air holes 21 circumferentially arranged. The stirring column 2 is connected and communicates with the rotating shaft 4 so that hot air in the rotating shaft 4 enters the stirring column 2 and is discharged through the air holes 21, thereby agitating the material in the chamber and accelerating the drying rate.

[0053] Reference Figure 3 In at least one embodiment, an adjusting column 3 is rotatably provided inside the stirring column 2, as shown in the reference. Figure 5The adjusting column 3 has several blocking blocks 31 around its circumference. The blocking blocks 31 are arc-shaped and have the same curvature as the inner wall of the stirring column 2, so that when the blocking blocks 31 rotate to coincide with the air hole 21, they can block or partially block the air hole 21, thereby adjusting the opening of the air hole 21.

[0054] According to the above configuration, when cleaning the inner wall of the drying barrel 1, the adjusting column 3 rotates so that the blocking block 31 blocks the circumferential air holes 21 of the stirring column 2, allowing air to blow through the air holes 21 towards the inner wall of the drying barrel 1 to clean the material adhering to the inner wall of the drying barrel 1. Furthermore, since the air holes 21 are circumferentially arranged, they can be divided into two types: air holes 21 facing the inner wall of the drying barrel 1 and other air holes 21. To achieve the above effect, two measures can be taken. One is to design the blocking block 31 corresponding to other air holes 21 to be the same size as other air holes 21, while designing the blocking block 31 facing the air hole 21 on the inner wall of the drying cylinder to be slightly larger in size so that the gas blown out from the air hole 21 facing the inner wall of the drying cylinder. The other is to design the air hole 21 facing the inner wall of the drying cylinder to be slightly smaller than other air holes 21, so as to ensure that the blocking block 31 of the same size can completely block other air holes 21, so that there is a certain gap between the air hole 21 facing the inner wall of the drying cylinder to blow out the gas, and the blown gas maintains a constant flow rate due to the large reduction in the outlet area, greatly accelerating the speed and forming an air knife to remove the material adhering to the inner wall of the drying cylinder 1.

[0055] Reference Figure 4 In at least one embodiment, the inner bottom wall of the stirring column 2 has an inclined groove 22, and the bottom of the adjusting column 3 has a guide contact block 32. The guide contact block 32 is in contact with the inclined groove 22. Specifically, when the stirring column 2 descends, the guide contact block 32 slides along the inclined groove 22, thereby driving the stirring column 2 to rotate and cover the air hole 21.

[0056] Reference Figure 3 In at least one embodiment, the top of the adjusting column 3 has an extension rod 34 that passes through the stirring column 2. Simultaneously, the top of the extension rod 34 has an adjusting ring 35, and the end of the extension rod 34 is inserted into the adjusting ring 35. With this configuration, when the adjusting ring 35 descends, it pushes the extension rod 34, causing the adjusting column 3 to descend, thereby allowing the adjusting column 3 to rotate under the cooperation of the guide contact block 32 and the adjusting column 3.

[0057] Reference Figure 1 In at least one embodiment, the drying barrel 1 is circumferentially provided with a plurality of cleaning cylinders 12, the movable ends of which are inserted into the drying barrel 1. (Refer to...) Figure 3The adjusting ring 35 has a lifting ramp 36 on the side facing the movable end of the cleaning cylinder 12. With the above arrangement, when the multiple cleaning cylinders 12 extend towards the center of the drying barrel 1, the movable end of the cleaning cylinder 12 pushes the lifting ramp 36, so that the adjusting ring 35 descends.

[0058] Reference Figure 5 In at least one embodiment, the bottom of the adjusting column 3 has a cooperating spring 33, one end of which abuts against the adjusting column 3, and the other end is connected to the stirring column 2. After the cleaning cylinder 12 is reset, the cooperating spring 33 extends and releases its elastic force to push the adjusting column 3 up to the reset position.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Based on the above-described ideal embodiments according to this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the technical spirit of the disclosed embodiments. The technical scope of the embodiments of this disclosure is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fluidized bed dryer that is easy to clean, characterized in that, include: Drying barrel (1), the interior of which is suitable for drying materials; At least one stirring column (2) is placed inside the drying barrel (1), and the stirring column (2) is provided with a number of air holes (21) in the circumferential direction; The stirring column (2) is rotatably equipped with an adjusting column (3), and the adjusting column (3) has several blocking blocks (31) in its circumferential direction; In addition, when cleaning the inner wall of the drying barrel (1), the adjusting column (3) is rotated so that the blocking block (31) blocks the circumferential air hole (21) of the stirring column (2), so that the air hole (21) towards the inner wall of the drying barrel (1) blows air to clean the material adhering to the inner wall of the drying barrel (1).

2. The easy-to-clean fluidized bed dryer as described in claim 1, characterized in that, The inner bottom wall of the stirring column (2) has an inclined groove (22); The bottom of the adjusting column (3) has a guide contact (32); The guide contact (32) is in contact with the inclined slide (22).

3. The easy-to-clean fluidized bed dryer as described in claim 1, characterized in that, The bottom of the adjusting column (3) has a matching spring (33), one end of which abuts against the adjusting column (3) and the other end is connected to the stirring column (2).

4. The easy-to-clean fluidized bed dryer as described in claim 1, characterized in that, The drying barrel (1) has a rotating shaft (4) inside, and the stirring column (2) is connected to and communicates with the rotating shaft (4); One end of the rotating shaft (4) is rotatably connected to the vent pipe (43).

5. The easy-to-clean fluidized bed dryer as described in claim 4, characterized in that, The drying barrel (1) has a transmission mechanism (11), and the rotating shaft (4) is connected to the transmission mechanism (11) for transmission.

6. The easy-to-clean fluidized bed dryer as described in claim 1, characterized in that, The top of the regulating column (3) has an extension rod (34), which extends through the stirring column (2). The top of the extension rod (34) has an adjustment ring (35), and the end of the extension rod (34) is inserted into the adjustment ring (35).

7. The easy-to-clean fluidized bed dryer as described in claim 6, characterized in that, The drying barrel (1) is provided with a plurality of cleaning cylinders (12) in the circumferential direction, and the movable end of the cleaning cylinder (12) is inserted into the drying barrel (1); The adjusting ring (35) has a lifting ramp (36) on the side facing the moving end of the cleaning cylinder (12).

8. The easy-to-clean fluidized bed dryer as described in claim 1, characterized in that, The side wall of the drying barrel (1) has a feed inlet (13) and a discharge outlet (14), with the feed inlet (13) located above the discharge outlet (14); The feed inlet (13) has a filter plate (15) above it, and the filter plate (15) is located above the stirring column (2); Below the discharge port (14) is an air distribution plate (16).

9. The easy-to-clean fluidized bed dryer as described in claim 8, characterized in that, The air distribution plate (16) has an air inlet pipe (17) below it, and an exhaust cap (18) is provided at the end of the air inlet pipe (17). The exhaust cap (18) is rotatably connected to the air inlet pipe (17).

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