Fluidized bed dryer

Abstract

The utility model relates to a fluidized bed dryer which comprises a filtering bin, a material bearing plate used for filtering materials is arranged in the filtering bin, a plurality of air inlet hoppers are arranged at the bottom of the material bearing plate, and a heat supply mechanism is arranged at the bottom of the filtering bin; the heat supply mechanism comprises an air supply box arranged at the bottom of the filter bin, one end of the air supply box is communicated with a heater, the other end of the heater is communicated with a fan, and the bottom end of the air inlet hopper is communicated with the air supply box; and the heater comprises a pipeline, a shell is arranged outside the pipeline, and a spiral electric heating wire located on the outer side of the pipeline is arranged in the shell. According to the device, through cooperation of the material bearing plate, the air inlet hopper, the air supply box and the heater, hot air can rise evenly and stably and make uniform contact with materials on the material bearing plate, and the heating efficiency is improved. And it is ensured that the materials are fully dried in the fluidized state, and the drying efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of drying technology, and in particular to a fluidized bed dryer. Background Art

[0002] In the chemical, pharmaceutical, food and other industries, fluidized bed dryers are widely used in material drying as a high-efficiency, continuous drying equipment.

[0003] Existing fluidized bed dryers typically use bottom-heating, where heated air is delivered to the filter chamber via a heating mechanism, drying the material while fluidized. However, the relatively limited heat supply path within the heating mechanism results in extremely uneven distribution of the heated air within the filter chamber. The material near the heating mechanism is overheated, which can easily lead to localized overheating, burning, or deterioration. Meanwhile, material further away from the heating mechanism experiences insufficient temperature, resulting in incomplete drying and even underdrying.

[0004] In view of the above problems, a fluidized bed dryer is now designed. Utility Model Content

[0005] The embodiment of the present application provides a fluidized bed dryer to solve the problem in the related art that the heating channel of the heating mechanism of the existing fluidized bed dryer is relatively single, resulting in extremely uneven distribution of heated air in the filter chamber.

[0006] In a first aspect, a fluidized bed dryer is provided, comprising:

[0007] A filter chamber, wherein the filter chamber has a receiving plate for filtering materials, a plurality of air inlet hoppers are provided at the bottom of the receiving plate, and a heating mechanism is provided at the bottom of the filter chamber;

[0008] The heating mechanism includes an air supply box arranged at the bottom of the filter bin, one end of the air supply box is connected to a heater, the other end of the heater is connected to a fan, and the bottom end of the air inlet hopper is connected to the air supply box;

[0009] The heater comprises a pipe, a shell is arranged outside the pipe, and a spiral electric heating wire is arranged inside the shell and located outside the pipe.

[0010] In some embodiments, a plurality of metal perforated meshes are provided inside the pipe, and the plurality of metal perforated meshes are spliced ​​together to form a filter channel for air filtration.

[0011] In some embodiments, a partition plate is provided inside the air supply box. The partition plate is L-shaped and is used to separate the air supply box into two chambers while supplying air to the air intake hopper.

[0012] In some embodiments, the air intake hopper includes a conveying pipe and an air storage hopper connected to each other. The air storage hopper is conical and has an opening on the top. The other end of the conveying pipe is connected to the air supply box, and several of the conveying pipes are distributed along the length of the air supply box.

[0013] In some embodiments, a feed hopper and a discharge hopper are respectively provided at both ends of the filter bin, and an exhaust pipe is provided above the filter bin, and the exhaust pipe is used to discharge dust and gas.

[0014] In some embodiments, a plurality of mounting holes are provided on the material receiving plate, and a filter is embedded in the mounting holes. The filter is fixed to the material receiving plate by bolts, and the filter is located above the corresponding gas storage hopper.

[0015] In some embodiments, two vibration motors are disposed opposite to each other on the filter chamber;

[0016] The bottom of the filter bin is further provided with an elastic bracket, which includes a plurality of support seats arranged at the bottom of the filter bin. The bottom of the support seat is provided with a spring, and the bottom end of the spring is provided with a plurality of supporting legs.

[0017] An embodiment of the present application provides a fluidized bed dryer, which, through the cooperation of a material receiving plate, an air inlet hopper, an air supply box and a heater, enables hot air to rise evenly and stably and evenly contact the material on the material receiving plate, ensuring that the material is fully dried in a fluidized state and improving the drying efficiency.

[0018] The combined design of spiral electric heating wire and pipe makes the air heating area larger, the heat distribution more uniform, and the heating efficiency improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of a three-dimensional structure provided in an embodiment of the present application;

[0021] Figure 2 A front cross-sectional view provided for an embodiment of the present application;

[0022] Figure 3 A right side view provided for an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the filter provided in an embodiment of the present application;

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the metal perforated mesh provided in an embodiment of the present application.

[0025] In the figure: 1. Filter chamber; 11. Exhaust pipe; 2. Material receiving plate; 21. Filter screen; 3. Air inlet hopper; 31. Delivery pipe; 32. Air storage hopper; 4. Vibration motor; 5. Heating mechanism; 51. Air supply box; 52. Heater; 53. Fan; 521. Pipe; 522. Shell; 523. Spiral electric heating wire; 6. Metal perforated mesh; 7. Partition plate. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The embodiment of the present application provides a fluidized bed dryer, which can solve the problem in the related art that the heating channel of the heating mechanism of the existing fluidized bed dryer is relatively single, resulting in extremely uneven distribution of heated air in the filter chamber.

[0028] See also Figure 1-Figure 3 A fluidized bed dryer includes a filter chamber 1, wherein the filter chamber 1 has a receiving plate 2 for filtering material, and a plurality of air inlet hoppers 3 are provided at the bottom of the receiving plate 2. A heating mechanism 5 is provided at the bottom of the filter chamber 1. The heating mechanism 5 includes an air supply box 51 arranged at the bottom of the filter chamber 1, and one end of the air supply box 51 is connected to a heater 52, and the other end of the heater 52 is connected to a fan 53. The bottom end of the air inlet hopper 3 is connected to the air supply box 51. The heater 52 includes a pipe 521, and a housing 522 is provided outside the pipe 521. The housing 522 contains a spiral electric heating wire 523 located outside the pipe 521.

[0029] First, the material to be dried is fed into the receiving plate 2 in the filter bin 1. The design of the receiving plate 2 allows the material to be evenly distributed while allowing hot air to rise through the air inlet hopper 3 below it and contact the material.

[0030] The fan 53 draws in outside air and then sends it into the heater 52 for heating. The pipe 521 of the heater 52 is wrapped in a housing 522, which contains a spiral heating wire 523. This increases the heating area and improves heating efficiency. Furthermore, the heat generated by the spiral heating wire 523 is evenly transferred to the air in the pipe 521, ensuring uniformity and stability of the heated air.

[0031] The heated air is distributed to each air inlet hopper 3 through the air supply box 51. The hot air can rise evenly and stably through the air inlet hopper 3 and contact the material on the material receiving plate 2, thereby achieving fluidized drying of the material.

[0032] During the drying process, the moisture in the material is evaporated by the hot air, and the formed water vapor mixes with the air and is discharged through the exhaust pipe 11 above the filter bin 1.

[0033] Through the cooperation of the material receiving plate 2, the air inlet hopper 3, the air supply box 51 and the heater 52, the hot air can rise evenly and stably and evenly contact the material on the material receiving plate 2, ensuring that the material is fully dried in a fluidized state and improving the drying efficiency.

[0034] The combined design of the spiral electric heating wire 523 and the pipe 521 makes the heating area of ​​the air larger, the heat distribution more uniform, and the heating efficiency improved.

[0035] Specifically, such as Figure 2 and Figure 5 As shown, a plurality of metal perforated meshes 6 are provided inside the pipe 521 , and a plurality of the metal perforated meshes 6 are spliced ​​together to form a filter channel for air filtration.

[0036] The metal perforated mesh 6 is spliced ​​inside the pipe 521 to form a filtering channel. When hot air passes through this channel, the hole structure of the metal perforated mesh 6 can effectively disperse the gas, making the hot air flow in the pipe 521 more uniform, avoiding the problem of local overheating or insufficient drying.

[0037] The metal perforated mesh 6 itself has good thermal conductivity and can quickly transfer the heat generated by the spiral electric heating wire 523 to the hot air passing through the pipe 521, thereby improving the heating efficiency and ensuring uniform heating of the hot air.

[0038] like Figure 2 As shown, a partition plate 7 is provided inside the air supply box 51 . The partition plate 7 is L-shaped and is used to separate the air supply box 51 into two chambers while supplying air to the air intake hopper 3 .

[0039] The partition plate 7 is L-shaped, which cleverly divides the internal space of the air supply box 51 into two independent chambers.

[0040] The upper chamber is primarily responsible for supplying air to the front air intake scoops 3, while the lower chamber is responsible for supplying air to the rear air intake scoops 3. This zoned air supply design allows for more rational distribution of hot air within the air supply box 51, avoiding issues such as uneven air supply or local overheating that may occur in traditional designs.

[0041] The partition plate 7 allows the hot air to be more evenly distributed inside the air supply box 51, thereby improving the uniformity of the air supply to each air inlet hopper 3. This helps to ensure that the material on the receiving plate 2 can be dried more fully.

[0042] In one embodiment, the air intake hopper 3 includes a conveying pipe 31 and an air storage hopper 32 that are interconnected. The air storage hopper 32 is conical and has an opening above it. The other end of the conveying pipe 31 is connected to the air supply box 51, and several of the conveying pipes 31 are distributed along the length of the air supply box 51.

[0043] The delivery pipe 31 is responsible for delivering hot air from the air supply box 51 to the air storage hopper 32. One end of the delivery pipe 31 is connected to the air supply box 51, and the other end is connected to the air storage hopper 32. Multiple delivery pipes 31 are distributed along the length of the air supply box 51 to ensure that the hot air can be evenly distributed to each air inlet hopper 3.

[0044] The air hopper 32 is tapered and open at the top, facilitating the even distribution and diffusion of hot air. When hot air enters the air hopper 32 through the delivery pipe 31, the tapered design of the hopper guides and evenly distributes the hot air through the upper opening of the hopper 32. The hot air then passes under the receiving plate 2 and enters the filter chamber 1, exchanging heat with the material.

[0045] In this embodiment, the filter chamber 1 is provided with a feed hopper and a discharge hopper at both ends, and an exhaust pipe 11 is provided above the filter chamber 1 for discharging dust and gas. The other end of the exhaust pipe 11 is connected to an external cyclone dust collector.

[0046] A feed hopper is provided at one end of the filter bin 1 for feeding the material to be dried into the bin; and a discharge hopper is provided at the other end for discharging the dried material.

[0047] The material receiving plate 2 is located inside the filter bin 1 to support the material and allow hot air to enter through the air inlet hopper 3 below it to exchange heat with the material. The design of the material receiving plate 2 should ensure that the material can be evenly distributed to improve drying efficiency.

[0048] Exhaust pipe 11 is located above filter chamber 1. Its primary function is to exhaust dust and gases generated during the drying process. The other end of exhaust pipe 11 is connected to an external cyclone dust collector, which effectively captures and collects dust particles in the gas, ensuring the cleanliness of the exhaust gas and preventing material waste.

[0049] like Figure 2 and Figure 4 As shown, the receiving plate 2 is provided with a plurality of mounting holes, and a filter screen 21 is embedded in the mounting hole. The filter screen 21 is fixed to the receiving plate 2 by bolts, and the filter screen 21 is located above the corresponding conical gas storage hopper 32.

[0050] The material support plate 2 is responsible for supporting the material to be dried and allowing hot air to enter through the air inlet hopper 3 below it to exchange heat with the material.

[0051] The filter screen 21 is embedded in the mounting hole on the receiving plate 2 so that the filter screen 21 can fit tightly against the receiving plate 2, preventing hot air or material from leaking from the gap between the filter screen 21 and the receiving plate 2, thereby ensuring the smooth progress of the drying process.

[0052] The filter screen 21 is fixed to the material receiving plate 2 by bolts. The tightening effect of the bolts not only ensures the stability of the filter screen 21, but also enables it to withstand the pressure from the material and hot air, preventing the filter screen 21 from being displaced or damaged during the drying process.

[0053] The filter screen 21 is located above the corresponding air storage hopper 32. When the hot air passes through the air storage hopper 32, the filter screen 21 can evenly distribute the hot air, so that the hot air can penetrate the material layer more evenly, thereby improving the drying efficiency.

[0054] In addition, in this embodiment, two vibration motors 4 are relatively arranged on the filter bin 1. An elastic bracket is also provided at the bottom of the filter bin 1, and the elastic bracket includes a plurality of support seats provided at the bottom of the filter bin 1. A spring is provided at the bottom of the support seat, and a plurality of legs are provided at the bottom end of the spring. A guiding mechanism is also provided at the bottom of the filter bin 1, and the guiding mechanism is used to guide the filter bin 1 to vibrate back and forth to one side. The guiding mechanism includes a support column relatively arranged on the air supply box 51, and four hinged pieces hingedly arranged at the bottom of the filter bin 1. The four hinged pieces are distributed in a rectangular shape, and a first connecting rod is hinged between two hinged pieces on the same side, and a second connecting rod is hinged between the support column and the adjacent hinged piece.

[0055] The vibration motor 4 is a key component for generating vibration force. Its function is to apply periodic vibration force to the filter bin 1 to keep the material in the bin loose during the drying process, prevent the material from agglomerating or clogging, and thus improve the drying efficiency and quality.

[0056] The elastic brackets at the bottom of the filter chamber 1 are key components for supporting and buffering vibration forces. These brackets include several support bases located at the bottom of the filter chamber 1, each with a spring at its base and several legs at its bottom. The vibration motor 4 allows the filter chamber 1 to generate a certain amplitude while simultaneously buffering and dispersing the vibration force through the elastic action of the springs, preventing excessive impact and damage to the equipment foundation.

[0057] The guide mechanism enables the filter chamber 1 to vibrate back and forth along a predetermined trajectory under the action of the vibration motor 4. This vibration method not only helps loosen and mix the materials, facilitating material loading and unloading, but also increases the contact area and contact time between the hot air and the materials, thereby improving drying efficiency. The guide mechanism also limits the vibration amplitude and direction of the filter chamber 1 to prevent excessive vibration or deviation from the predetermined trajectory.

[0058] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0059] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0060] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A fluidized bed dryer, characterized in that: include: A filter chamber (1), wherein the filter chamber (1) has a material receiving plate (2) for filtering materials, a plurality of air inlet hoppers (3) are provided at the bottom of the material receiving plate (2), and a heating mechanism (5) is provided at the bottom of the filter chamber (1); The heating mechanism (5) comprises an air supply box (51) arranged at the bottom of the filter bin (1); one end of the air supply box (51) is connected to a heater (52); the other end of the heater (52) is connected to a fan (53); and the bottom end of the air inlet hopper (3) is connected to the air supply box (51); The heater (52) comprises a pipe (521), a shell (522) is provided outside the pipe (521), and a spiral electric heating wire (523) is provided inside the shell (522) and is located outside the pipe (521).

2. A fluidized bed dryer according to claim 1, characterized in that: A plurality of metal perforated meshes (6) are provided inside the pipe (521), and the plurality of metal perforated meshes (6) are spliced ​​together to form a filter channel for air filtration.

3. The fluidized bed dryer according to claim 1, wherein: A partition plate (7) is provided inside the air supply box (51), and the partition plate (7) is L-shaped and is used to separate the air entering the air supply box (51) into two chambers while supplying air to the air intake hopper (3).

4. The fluidized bed dryer according to claim 1, wherein: The air inlet hopper (3) comprises a delivery pipe (31) and an air storage hopper (32) which are connected to each other. The air storage hopper (32) is conical and has an opening on the top. The other end of the delivery pipe (31) is connected to the air supply box (51). A plurality of the delivery pipes (31) are distributed along the length of the air supply box (51).

5. The fluidized bed dryer according to claim 1, wherein: A feed hopper and a discharge hopper are respectively provided at both ends of the filter bin (1), and an exhaust pipe (11) is provided above the filter bin (1), and the exhaust pipe (11) is used to discharge dust and gas.

6. A fluidized bed dryer according to claim 4, characterized in that: The receiving plate (2) is provided with a plurality of mounting holes, wherein a filter screen (21) is embedded in the mounting holes. The filter screen (21) is fixed to the receiving plate (2) by bolts, and the filter screen (21) is located above the corresponding gas storage hopper (32).

7. The fluidized bed dryer according to claim 1, wherein: Two vibration motors (4) are arranged opposite to each other on the filter chamber (1); The bottom of the filter bin (1) is also provided with an elastic bracket, and the elastic bracket comprises a plurality of support seats provided at the bottom of the filter bin (1), a spring is provided at the bottom of the support seat, and a plurality of supporting legs are provided at the bottom end of the spring.

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