Baking soda drying fluidized bed hot air circulation device

Abstract

This utility model relates to the technical field of baking soda processing equipment, and discloses a hot air circulation device for a fluidized bed in baking soda drying process. The device includes a fluidized bed with an air inlet at its top. A mounting plate is attached to the top of the air inlet via bolts. An air inlet pipe is positioned above the mounting plate, and an air inlet fan is fixedly connected to the top of the air inlet pipe. In this utility model, a switching structure is used to switch the direction of the air inlet channel by rotating a sphere. This allows for flexible adjustment of the hot air flow direction, enabling heating through heating element A and heating element B respectively. The hot air temperature can be precisely adjusted according to the drying requirements of the baking soda, improving the drying effect. The switching operation is simple, requiring only a manual knob, eliminating the need for complex controls, reducing the difficulty and cost of equipment operation, and enhancing the applicability and flexibility of the equipment to meet the needs of different drying processes.

Description

Technical Field

[0001] This utility model relates to the technical field of baking soda processing equipment, and in particular to a hot air circulation device for drying baking soda in a fluidized bed. Background Technology

[0002] The sodium bicarbonate dryer fluidized bed hot air circulation device is an industrial equipment used for drying sodium bicarbonate. This device utilizes fluidized bed technology to keep the sodium bicarbonate granules in a fluidized state under the action of hot air, achieving a highly efficient and uniform drying effect. Its core lies in using a hot air circulation system to introduce heated air into the fluidized bed, removing moisture from the material, while simultaneously maintaining pressure balance within the system through an exhaust system, ensuring the stability and efficiency of the drying process.

[0003] In existing hot air circulation fluidized bed drying systems for baking soda, the typical operating procedure is as follows: First, the intake fan is started to introduce outside air into the heater for heating. The heated air then enters the inlet of the fluidized bed through pipes, causing the baking soda particles to remain suspended within the fluidized bed, thus achieving the drying process. Simultaneously, waste gas from the fluidized bed is discharged through the exhaust fan to maintain pressure balance within the system. Operators manually adjust the heater temperature according to the drying requirements of the baking soda to meet different drying process specifications.

[0004] First, when the heater malfunctions or requires maintenance, the entire unit must be shut down. This not only affects production efficiency but may also lead to excessively long residence time of materials in the fluidized bed, impacting product quality. Second, existing units cannot flexibly switch between different heating channels when adjusting temperature, making it difficult to achieve drying effects at different temperatures and limiting the equipment's applicability and flexibility. Therefore, a sodium bicarbonate drying fluidized bed hot air circulation device is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hot air circulation device for a sodium bicarbonate drying fluidized bed, which aims to improve the problems in the prior art where the electric heating tube needs to be shut down for maintenance when damaged and the temperature cannot be flexibly switched.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hot air circulation device for a sodium bicarbonate drying fluidized bed, comprising a fluidized bed, an air inlet at the top of the fluidized bed, a mounting plate at the top of the air inlet, the mounting plate being threadedly connected to the top of the air inlet by bolts, an air inlet pipe above the mounting plate, an air inlet fan fixedly connected to the top of the air inlet pipe, an air outlet at the outer wall of the fluidized bed, an air outlet fan fixedly connected to the outer wall of the air outlet, an air outlet pipe fixedly connected to the air outlet fan's outlet, the end of the air outlet pipe penetrating the outer surface of the air inlet pipe, and the end of the air outlet pipe communicating with the interior of the air inlet pipe; The bottom end of the air inlet pipe is provided with a switching structure, which includes an outer shell. The inner wall of the outer shell contacts a sphere. An air inlet channel is opened on the top of the sphere. Electric heating tube A and electric heating tube B are fixedly connected to the outer surface of the outer shell. A spiral air guide plate is fixedly connected to the inner wall of electric heating tube B. The bottom ends of electric heating tube A and electric heating tube B both penetrate the top of the mounting plate and are connected to the air inlet of the fluidized bed. The bottom of the air inlet channel is connected to the top of electric heating tube B. A positioning structure is provided between the sphere and the outer shell.

[0007] As a further description of the above technical solution: the switching structure also includes an extension plate, one side of which is fixedly connected to the outer surface of the housing, and a rotating rod is rotatably connected to the top of the extension plate via a bearing. A drive gear is fixedly connected to the surface of the rotating rod, and a toothed ring is fixedly connected to the outer surface of the sphere. A rectangular hole is opened on the side of the housing near the drive gear, and the side of the drive gear meshes with the outer side of the toothed ring. A knob is fixedly connected to the top of the rotating rod.

[0008] As a further description of the above technical solution: the positioning structure includes a movable groove, and a positioning ball is elastically connected to the inner wall of the movable groove by a spring, and the surface of the positioning ball abuts against the inner wall of the positioning groove.

[0009] As a further description of the above technical solution: one end of the spring is fixedly connected to the inner wall of the movable groove, and the other end of the spring is fixedly connected to the surface of the positioning ball.

[0010] As a further description of the above technical solution: the top of the mounting plate is threadedly connected to the top of the fluidized bed by bolts.

[0011] As a further description of the above technical solution: a one-way valve is fixedly connected to one end of the air outlet pipe that connects to the air inlet pipe.

[0012] As a further description of the above technical solution: the number of positioning slots is two, both positioning slots are arc-shaped, the two positioning slots are symmetrically opened on the inner walls of both sides of the outer shell, and the positioning ball is adapted to the two positioning slots respectively.

[0013] As a further description of the above technical solution: the air intake channel consists of a vertical channel and an oblique channel, and the air intake channel is obtuse-angled.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by setting a switching structure, when heating tube A or heating tube B is damaged or needs maintenance, it can be flexibly switched to another normally operating heating tube, realizing maintenance without stopping the machine, ensuring production continuity, improving equipment operating efficiency. At the same time, the switching structure can switch different channels according to different drying needs to achieve different drying effects at different temperatures, meet various process requirements, enhance the applicability and flexibility of the equipment, and improve product quality and production efficiency.

[0015] 2. In this utility model, the positioning structure is designed to fix the position of the ball by cooperating with the positioning ball and the positioning groove. The spring provides elastic force to ensure that the positioning ball and the positioning groove are tightly abutted, so that the position of the ball is stable and reliable after switching. This avoids the deviation of the air intake channel due to vibration or airflow impact, effectively ensuring the accuracy of the hot air flow direction, ensuring the stability of equipment operation, extending the service life of the equipment, and improving the accuracy and repeatability of the drying process, thus ensuring product quality. Attached Figure Description

[0016] Figure 1 This is a front view of the sodium bicarbonate drying fluidized bed hot air circulation device proposed in this utility model; Figure 2 This is a cross-sectional schematic diagram of the outer shell, mounting plate, and air outlet pipe of the sodium bicarbonate drying fluidized bed hot air circulation device proposed in this utility model; Figure 3 This is a cross-sectional schematic diagram of the sphere of the sodium bicarbonate drying fluidized bed hot air circulation device proposed in this utility model; Figure 4 This is a schematic diagram of the sphere and toothed ring of the sodium bicarbonate drying fluidized bed hot air circulation device proposed in this utility model. Figure 5 The sodium bicarbonate drying fluidized bed hot air circulation device proposed in this utility model Figure 3 Enlarged view of point A.

[0017] Legend: 1. Fluidized bed; 2. Mounting plate; 3. Inlet duct; 4. Inlet fan; 5. Outlet duct; 6. Switching structure; 601. Outer shell; 602. Sphere; 603. Gear ring; 604. Extension plate; 605. Drive gear; 606. Heating element A; 607. Heating element B; 608. Spiral air guide plate; 609. Inlet channel; 7. Positioning structure; 701. Movable groove; 702. Spring; 703. Positioning ball; 8. One-way valve for duct; 9. Outlet fan. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 , Figure 2 This utility model provides an embodiment of a hot air circulation device for a sodium bicarbonate drying fluidized bed 1, comprising a fluidized bed 1 with an air inlet at its top. The top of the air inlet contacts a mounting plate 2, which is threadedly connected to the top of the fluidized bed 1 via bolts. This connection ensures the sealing and stability between the mounting plate 2 and the fluidized bed 1, preventing gas leakage. The mounting plate 2 is threadedly connected to the top of the air inlet via bolts. An air inlet pipe 3 is positioned above the mounting plate 2, and an air intake fan 4 is fixedly connected to the top of the air inlet pipe 3. The air intake fan 4 provides power to the entire device, introducing outside air into the device to provide hot air for the sodium bicarbonate drying process. An air outlet is provided on the outer wall of the fluidized bed 1. An exhaust fan 9 is fixedly connected to the outer wall of the air outlet. The function of the exhaust fan 9 is to extract the dried waste gas in the fluidized bed 1 and maintain the air pressure balance in the fluidized bed 1. An exhaust pipe 5 is fixedly connected to the air outlet of the exhaust fan 9. The end of the exhaust pipe 5 penetrates the outer surface of the inlet pipe 3 and is connected to the inside of the inlet pipe 3. This connection method realizes the recycling of hot air and improves energy utilization efficiency. A one-way valve 8 is fixedly connected to the end of the exhaust pipe 5 that is connected to the inlet pipe 3. The function of the one-way valve 8 is to ensure that the gas can only flow in one direction, prevent the waste gas from flowing back into the inlet pipe 3, and ensure the normal operation of the system. Reference Figure 2 - Figure 4The bottom end of the air inlet pipe 3 is provided with a switching structure 6. The switching structure 6 includes a housing 601. The inner wall of the housing 601 contacts a sphere 602. The top of the sphere 602 has an air inlet channel 609, which consists of a vertical channel and an oblique channel. The air inlet channel 609 is obtuse-angled, allowing the air inlet direction to be flexibly switched as needed. Heating tubes A606 and B607 are fixedly connected to the outer surface of the housing 601. The function of heating tubes A606 and B607 is to heat the air entering the fluidized bed 1, providing the heat required for drying. Heating tube B607... A spiral air guide plate 608 is fixedly connected to the inner wall. The function of the spiral air guide plate 608 is to guide the airflow so that the air flows evenly in the electric heating tube B607, thereby improving the heating efficiency. The bottom ends of the electric heating tubes A606 and B607 both penetrate the top of the mounting plate 2 and are connected to the air inlet of the fluidized bed 1, ensuring that the heated air can smoothly enter the interior of the fluidized bed 1. The bottom of the air inlet channel 609 is connected to the top of the electric heating tube B607. A positioning structure 7 is provided between the sphere 602 and the outer shell 601. The function of the positioning structure 7 is to fix the position of the sphere 602 and ensure the stability of the direction of the air inlet channel 609.

[0020] Reference Figure 2 - Figure 4 The switching structure 6 also includes an extension plate 604. One side of the extension plate 604 is fixedly connected to the outer surface of the housing 601. The top of the extension plate 604 is rotatably connected to a rotating rod via a bearing. The rotating rod provides power for the rotation of the ball 602. A drive gear 605 is fixedly connected to the surface of the rotating rod. The drive gear 605 drives the ball 602 to rotate by rotating. A gear ring 603 is fixedly connected to the outer surface of the ball 602. The gear ring 603 meshes with the drive gear 605, so that the rotation of the drive gear 605 can drive the ball 602 to rotate. A rectangular hole is opened on the side of the housing 601 near the drive gear 605. The rectangular hole provides space for the meshing of the gear ring 603 and the drive gear 605. The side of the drive gear 605 meshes with the outer side of the gear ring 603. A knob is fixedly connected to the top of the rotating rod. The knob allows the operator to manually control the rotation of the rotating rod, thereby realizing the switching of the air intake channel 609.

[0021] Reference Figure 3 , Figure 5The positioning structure 7 includes a movable groove 701. The inner wall of the movable groove 701 is elastically connected to a positioning ball 703 via a spring 702. The positioning ball 703 abuts against the positioning groove under the action of the spring 702, fixing the position of the ball 602. The surface of the positioning ball 703 abuts against the inner wall of the positioning groove. One end of the spring 702 is fixedly connected to the inner wall of the movable groove 701, and the other end of the spring 702 is fixedly connected to the surface of the positioning ball 703. This connection method allows the positioning ball 703 to move within the movable groove 701 while maintaining close contact with the positioning groove. There are two positioning grooves, both of which are arc-shaped. The two positioning grooves are symmetrically opened on the inner walls of both sides of the outer shell 601. The positioning ball 703 is adapted to the two positioning grooves respectively, so that the ball 602 can be fixed in two different positions, thereby realizing the switching of the direction of the air intake channel 609.

[0022] Working principle: The operator selects a suitable heating element for heating according to the initial moisture content and drying requirements of the baking soda. If heating element A606 is required, the operator rotates the lever by turning the knob, causing the drive gear 605 to drive the gear ring 603, which in turn causes the ball 602 to rotate. This switches the air intake channel 609 to the position connected to the heating element A606. The positioning ball 703 of the positioning structure 7 abuts against the positioning groove under the action of the spring 702, fixing the position of the ball 602. The air intake fan 4 is started, and outside air enters the switching structure 6 through the air intake pipe 3 and enters the heating element A606 through the air intake channel 609 for heating. The heated hot air enters the air inlet of the fluidized bed 1 through the mounting plate 2 to dry the baking soda in the fluidized bed 1.

[0023] During the drying process, the exhaust fan 9 continuously operates, extracting the dried waste gas from the fluidized bed 1 and discharging it through the exhaust pipe 5. The exhaust pipe 5 is connected to the inlet pipe 3. The residual heat in the waste gas can enter the inlet pipe 3 through the one-way valve 8, realizing the recycling of hot air and improving energy efficiency. If it is necessary to switch to the electric heating element B607 during the drying process, the operator only needs to rotate the knob again to switch the air inlet channel 609 to the position connected to the electric heating element B607 through the same switching mechanism. At the same time, the positioning structure 7 fixes the sphere 602. The new position ensures the stability of the hot air flow. When heating element A606 or heating element B607 malfunctions or requires maintenance, the operator can switch the hot air flow to another normally functioning heating element through the switching structure 6. Maintenance or replacement can be performed without stopping the machine, ensuring the continuity of the production process. Throughout the use, the operator can adjust the direction of the air intake channel 609 at any time according to the drying progress and temperature requirements of the baking soda, flexibly switching between hot air at different temperatures to achieve precise drying control and improve product quality and production efficiency.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot air circulation device for a sodium bicarbonate drying fluidized bed (1), comprising a fluidized bed (1), characterized in that: The fluidized bed (1) has an air inlet at the top, and the top of the air inlet contacts an installation plate (2). The top of the air inlet is connected to the installation plate (2) by bolt thread. An air inlet pipe (3) is provided above the installation plate (2). An air inlet fan (4) is fixedly connected to the top of the air inlet pipe (3). An air outlet is provided on the outer wall of the fluidized bed (1). An air outlet fan (9) is fixedly connected to the outer wall of the air outlet. An air outlet pipe (5) is fixedly connected to the air outlet of the air outlet fan (9). The end of the air outlet pipe (5) penetrates the outer surface of the air inlet pipe (3). The end of the air outlet pipe (5) is connected to the interior of the air inlet pipe (3). The bottom end of the air inlet pipe (3) is provided with a switching structure (6). The switching structure (6) includes a shell (601). The inner wall of the shell (601) contacts a sphere (602). The top of the sphere (602) is provided with an air inlet channel (609). The outer surface of the shell (601) is fixedly connected to an electric heating tube A (606) and an electric heating tube B (607). The inner wall of the electric heating tube B (607) is fixedly connected to a spiral air guide plate (608). The bottom ends of the electric heating tube A (606) and the electric heating tube B (607) both penetrate the top of the mounting plate (2) and are connected to the air inlet of the fluidized bed (1). The bottom of the air inlet channel (609) is connected to the top of the electric heating tube B (607). A positioning structure (7) is provided between the sphere (602) and the shell (601).

2. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 1, characterized in that: The switching structure (6) also includes an extension plate (604), one side of which is fixedly connected to the outer surface of the housing (601). The top of the extension plate (604) is rotatably connected to a rotating rod via a bearing. The surface of the rotating rod is fixedly connected to a drive gear (605). The outer surface of the sphere (602) is fixedly connected to a gear ring (603). A rectangular hole is provided on the side of the housing (601) near the drive gear (605). The side of the drive gear (605) meshes with the outer side of the gear ring (603). A knob is fixedly connected to the top of the rotating rod.

3. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 2, characterized in that: The positioning structure (7) includes a movable groove (701), and a positioning ball (703) is elastically connected to the inner wall of the movable groove (701) by a spring (702). The surface of the positioning ball (703) abuts against the inner wall of the positioning groove.

4. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 3, characterized in that: One end of the spring (702) is fixedly connected to the inner wall of the movable groove (701), and the other end of the spring (702) is fixedly connected to the surface of the positioning ball (703).

5. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 1, characterized in that: The top of the mounting plate (2) is threadedly connected to the top of the fluidized bed (1) by bolts.

6. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 1, characterized in that: One end of the air outlet pipe (5) that connects to the air inlet pipe (3) is fixedly connected to a one-way valve (8).

7. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 3, characterized in that: The number of positioning slots is two, both of which are arc-shaped and are symmetrically located on the inner walls of both sides of the outer shell (601). The positioning ball (703) is adapted to each of the two positioning slots.

8. The hot air circulation device for the sodium bicarbonate drying fluidized bed (1) according to claim 2, characterized in that: The air intake channel (609) consists of a vertical channel and an oblique channel, and the air intake channel (609) is obtuse-angled.

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