Rotary flash evaporation hot air dryer

Abstract

The utility model belongs to the technical field of air dryers, and particularly relates to a rotary flash evaporation hot air dryer which comprises a bottom plate, a supporting column, an air drying cylinder, a hot air inlet pipe, an air inlet, a feeding pipe, a second motor, a rotating shaft, a stirring rod, an end cover, a particle extrusion hole, a first motor, a spiral conveying rod, a hopper, a butt joint hole, a sliding rod, a scraping rod, a spring, a discharging pipe and the like. A second motor drives a rotating shaft to rotate to drive a stirring rod to smash materials, a first motor drives a spiral conveying rod to convey filter cakes in a hopper into an air drying cylinder, after the materials are extruded into particles at particle extrusion holes, scraping rods continuously make contact with the inner wall of the air drying cylinder, and it is ensured that the materials are evenly distributed and make full contact with hot air; hot air is tangent to the surface of the air drying cylinder through the hot air inlet pipe to form a cyclone field, the contact efficiency of the hot air and materials is improved, the dried materials are conveyed to the cyclone separator through the discharging pipe, and the efficient and energy-saving drying process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air dryer, concretely relates to a rotary flash evaporation hot air dryer. BACKGROUND

[0002] In the industrial production process, filter cake as a common solid waste, widely exists in chemical industry, food processing, pharmaceutical industry and other industries. Effective treatment and resource utilization of filter cake has important significance for environmental protection and resource conservation. The traditional filter cake treatment method mainly includes natural air drying, mechanical pressing drying and hot air drying. Among them, hot air drying is widely used in filter cake treatment process because of its fast drying speed and low energy consumption.

[0003] The existing hot air drying equipment usually uses a spiral feeder to transport the filter cake into the drying chamber, and the filter cake is broken by the high-speed rotating stirring paddle inside to increase the contact between the material and the hot air. However, it is difficult to completely crush the material by relying on the stirring paddle alone. If the particle size of the material is too large, it will affect the drying effect, and the large particle material cannot flow with the hot air, causing blockage inside the dryer. SUMMARY

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a rotary flash evaporation hot air dryer, which can effectively crush filter cake during drying, improve the contact efficiency of hot air and material, and has automatic operation capability, so as to improve the drying efficiency and product quality.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A rotary flash evaporation hot air dryer, comprising a bottom plate, a support column is vertically arranged at each corner of the upper surface of the bottom plate, a drying cylinder is fixed inside the four support columns, the bottom of the drying cylinder is suspended, a hot air inlet pipe is arranged below one side of the drying cylinder, an air inlet is formed in the inside of the drying cylinder, the air inlet is communicated with the hot air inlet pipe, the hot air inlet pipe is tangent to the surface of the drying cylinder, a feeding pipe is further arranged below the other side of the surface of the drying cylinder, the feeding pipe is communicated with the inside of the drying cylinder, the feeding pipe is horizontal and arranged perpendicular to the axis of the drying cylinder, a second motor is fixed at the bottom of the drying cylinder, a rotating shaft is installed at the output end of the second motor, the rotating shaft is vertically rotated inside the bottom of the drying cylinder, stirring rods are uniformly installed on the surface of the rotating shaft, the stirring rods are horizontally arranged, a plurality of stirring rods are arranged in layers from top to bottom, an end cover is installed at the outlet of the feeding pipe, the end cover seals the outlet of the feeding pipe, the end cover is flush with the inner wall of the drying cylinder, particle extrusion holes are uniformly formed in the surface of the end cover, and the bottommost stirring rod corresponds to the feeding pipe.

[0007] Furthermore, a first motor is fixed to the outer end of the feed pipe, and a spiral conveying rod is installed at the output end of the first motor. The spiral conveying rod is rotatably placed inside the feed pipe.

[0008] Furthermore, a hopper is provided above the end of the feed pipe near the first motor. The hopper has a structure that is larger at the top and smaller at the bottom. The hopper is connected to the inside of the feed pipe, and the top of the hopper is open.

[0009] Furthermore, each of the bottommost stirring rods has a docking hole at its end, and the docking hole is hollow with its end open.

[0010] Furthermore, a slide rod is slidably installed at the end of the docking hole, and a scraper is vertically arranged at the outer end of the slide rod. The scraper contacts the inner wall of the drying cylinder, and the end of the scraper is at the same height as the end cover.

[0011] Furthermore, a spring is provided inside the docking hole, and one end of the spring is in contact with the end surface of the slide bar that is away from the scraper bar.

[0012] Furthermore, a discharge pipe is provided at the top of the drying cylinder, and the end of the discharge pipe is connected to a cyclone separator.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] First, by setting up a rotating shaft driven by a second motor and its surface with evenly installed multi-layered stirring rods, continuous stirring and crushing of the material is achieved during the drying process. The horizontal arrangement and multi-layered distribution of the stirring rods effectively prevent the material from clumping within the drying chamber, ensuring sufficient contact between hot air and the material. Simultaneously, the rotation of the screw conveyor not only transports the filter cake but also pre-crushes larger filter cakes, reducing material size. This design effectively solves the problem of pre-crushing large filter cakes in traditional hot air drying equipment, simplifying the production process.

[0015] Secondly, the screw conveyor can transport and compress the material inside the feed pipe, so that the material can only be discharged through the particle extrusion hole on the end cover, further preventing the material from agglomerating. The extruded material will be subjected to the shearing force of the scraper to cut it into small particles, which are easy to further crush. This structure not only improves the crushing effect of the material, but also improves the drying efficiency and product quality.

[0016] Furthermore, the tangential alignment of the hot air inlet pipe with the surface of the drying cylinder creates a powerful cyclone field, enhancing the circulation of hot air within the drying chamber. This cyclone field promotes the upward movement of the dehydrated material with the hot airflow, and the airflow containing hot air is then transported to the cyclone separator through the outlet pipe, achieving efficient separation and recycling of the hot air and material. This design not only improves the utilization efficiency of hot air and reduces energy consumption, but also ensures the purity of the dried material through the application of the cyclone separator, further optimizing the overall performance of the drying system.

[0017] Finally, this invention significantly reduces the need for manual operation through an automated motor drive system and the coordinated work of all components, thereby improving the level of automation and ease of operation. Simultaneously, the optimized design of the equipment structure makes the overall equipment more stable, operates more smoothly, and is easier to maintain. These beneficial effects collectively improve the working efficiency and reliability of the drying equipment, meeting the industrial demand for efficient, energy-saving, and environmentally friendly drying equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 1 A schematic diagram of the frontal sectional view of the structure;

[0021] Figure 4 For the present utility model Figure 1 A top-view cross-sectional structural diagram;

[0022] Figure 5 This is a three-dimensional structural diagram of the installation of the bottommost stirring rod and slide rod of this utility model;

[0023] Figure 6 For the present utility model Figure 3 A magnified structural diagram of area A.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Base plate; 11. Support column; 2. Drying tube; 21. Discharge pipe; 22. Hot air inlet pipe; 23. Air inlet; 24. Feed pipe; 25. Hopper; 26. First motor; 27. Screw conveyor rod; 3. Second motor; 31. Rotating shaft; 4. Stirring rod; 41. Connecting hole; 5. End cap; 51. Particle extrusion hole; 6. Slide rod; 7. Scraper rod; 8. Spring. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] refer to Figures 1-4 As shown, a rotary flash hot air dryer includes a base plate 1; support columns 11 are vertically installed at the four corners of the upper surface of the base plate 1 to ensure the structural stability of the entire drying equipment; drying cylinders 2 are fixed inside the four support columns 11, serving as the main drying chamber, and their design ensures that the material is heated evenly during the drying process; the bottom of the drying cylinder 2 is suspended to prevent the material from directly contacting the bottom and to promote effective circulation of hot air; a hot air inlet pipe 22 is installed on one side of the lower part of the drying cylinder 2 to preheat the air. Air is delivered into the drying chamber; an air inlet 23 is provided inside the drying cylinder 2, which is connected to the hot air inlet pipe 22 to ensure that hot air can enter the drying chamber efficiently; the hot air inlet pipe 22 is tangential to the surface of the drying cylinder 2, optimizing the flow path of the hot air so that the hot air can form a cyclone after entering the drying cylinder 2; a feed pipe 24 is also provided on the other side of the surface of the drying cylinder 2, which is connected to the inside of the drying cylinder 2 to ensure that the material can enter the drying chamber smoothly; the feed pipe 24 is horizontal. The drying cylinder 2 is perpendicular to its axis. A second motor 3 is fixed at the bottom of the drying cylinder 2, which drives the rotation of the rotating shaft 31. The output end of the second motor 3 is equipped with the rotating shaft 31, which rotates vertically inside the drying cylinder 2. The rotation of the rotating shaft 31 drives the movement of the stirring rods 4. The stirring rods 4 are evenly installed on the surface of the rotating shaft 31. The stirring rods 4 are horizontally arranged, and multiple stirring rods 4 are arranged in layers, with multiple stirring rods 4 in each layer, to ensure that the material is fully stirred and crushed during the drying process. An end cap 5 is installed at the outlet of the feed pipe 24, which seals the outlet of the feed pipe 24. The end cap 5 is flush with the inner wall of the drying cylinder 2 to ensure that the scraper 7 can pass along the surface of the end cap 5 during operation and cut off the material protruding from its surface. The surface of the end cap 5 is evenly provided with particle extrusion holes 51, which are used for extruding and shaping the material to form small particles. The bottom stirring rods 4 correspond to the feed pipe 24 to ensure that the material can be effectively stirred and crushed after entering.

[0028] refer to Figure 1 and Figure 3As shown, a first motor 26 is fixed to the outer end of the feed pipe 24. The first motor 26 is used to drive the rotation of the screw conveyor 27. The output end of the first motor 26 is equipped with the screw conveyor 27, which is rotated inside the feed pipe 24. The screw conveyor 27 conveys the filter cake in the hopper 25 to the drying cylinder 2 through its spiral structure. The rotation of the screw conveyor 27 not only realizes the conveying of materials, but also performs preliminary crushing of larger filter cakes and squeezes the materials inside the feed pipe 24 so that they are discharged through the particle squeezing hole 51, reducing the particle size of the materials and improving the subsequent drying efficiency.

[0029] refer to Figure 3 As shown in the figure, a hopper 25 is provided above the end of the feed pipe 24 near the first motor 26. The hopper 25 has a structure that is larger at the top and smaller at the bottom. The hopper 25 is connected to the inside of the feed pipe 24. The top of the hopper 25 is open, which makes it easy for manual or automated equipment to unload the filter cake into the hopper 25. The design of the hopper 25 ensures that the material can enter the drying chamber evenly through the feed pipe 24, avoiding material accumulation or blockage, and improving the continuity and stability of the drying process.

[0030] refer to Figure 3 and Figure 6 As shown, the bottommost stirring rod 4 is provided with a docking hole 41 at each end. The docking hole 41 is hollow inside with an open end for installing the slide rod 6. The design of the docking hole 41 allows the slide rod 6 to slide freely at the end of the stirring rod 4, ensuring that the scraper 7 can flexibly contact the inner wall of the drying cylinder 2, thereby effectively scraping off the material, preventing the material from adhering, and ensuring the continuity and uniformity of the drying process.

[0031] refer to Figure 6 As shown, a slide rod 6 is slidably installed at the end of the docking hole 41, and a scraper 7 is vertically arranged at the outer end of the slide rod 6. The scraper 7 is in contact with the inner wall of the drying cylinder 2. The design of the scraper 7 ensures that the material squeezed out through the particle extrusion hole 51 can be effectively scraped off when the rotating shaft 31 rotates. The end of the scraper 7 is at the same height as the end cap 5, which ensures that the material can be evenly distributed during the drying process and avoids some material from not being cut off due to height differences. The slide rod 6 maintains continuous contact between the scraper 7 and the inner wall of the drying cylinder 2 through the action of the spring 8, ensuring the efficiency and effect of scraping the material during the rotation of the rotating shaft 31.

[0032] refer to Figure 1 and Figure 3 As shown, the top of the drying cylinder 2 is equipped with a discharge pipe 21, the end of which is connected to a cyclone separator. The cyclone separator is used to effectively separate the dried material from the hot air. The design of the discharge pipe 21 ensures that the dried small particles can be discharged smoothly, while the hot air is recycled through the cyclone separator, improving energy efficiency. The addition of the cyclone separator further optimizes the overall performance of the drying system, ensuring that the drying process is efficient and environmentally friendly.

[0033] The working principle of this utility model is as follows: After the washed filter cake is unloaded, it is manually transported to the drying and packaging workshop. The filter cake is poured into the hopper 25, and at the same time, the second motor 3 and the first motor 26 are started. The start of the second motor 3 can drive the rotating shaft 31 to rotate, which in turn drives the multiple stirring rods 4 on its surface to rotate, crushing the incoming material. The start of the first motor 26 can drive the screw conveyor 27 to rotate, so as to convey the filter cake inside the hopper 25 into the drying cylinder 2. The rotation of the screw conveyor 27 can crush larger filter cakes. The material is crushed and then squeezed through the particle extrusion hole 51 to form strips or granules. At this time, since the bottom stirring rod 4 is at the same height as the end cover 5, and the presence of the spring 8 makes the slide rod 6 have a force away from the direction of the rotating shaft 31, the scraper 7 is always in contact with the inner wall of the drying cylinder 2. Therefore, when the rotating shaft 31 rotates, it can drive multiple scrapers 7 to scrape off the material extruded through the particle extrusion hole 51, thereby forming small particles. This ensures that the material entering the drying cylinder 2 can be fully crushed, improves the contact with hot air, and improves the heat drying effect.

[0034] During this process, hot air is delivered into the interior through the hot air inlet pipe 22. Since the hot air inlet pipe 22 is tangent to the drying cylinder 2, the hot air will form a strong cyclone field inside the drying cylinder 2 along the tangent. At this time, the dehydrated dry material inside will rise with the hot air flow and be transported to the cyclone separator through the discharge pipe 21 to achieve separation after drying.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A rotary flash hot air dryer, comprising a base plate (1), characterized in that: Support columns (11) are vertically installed at the four corners of the upper surface of the base plate (1). A drying cylinder (2) is fixed inside the four support columns (11). The bottom of the drying cylinder (2) is suspended. A hot air inlet pipe (22) is installed below one side of the drying cylinder (2). An air inlet (23) is opened inside the drying cylinder (2). The air inlet (23) is connected to the hot air inlet pipe (22). The hot air inlet pipe (22) is tangent to the surface of the drying cylinder (2). A feed pipe (24) is also installed below the other side of the surface of the drying cylinder (2). The feed pipe (24) is connected to the inside of the drying cylinder (2). The feed pipe (24) is horizontal and perpendicular to the axis of the drying cylinder (2). The bottom of the drying cylinder (2) is fixed with a second motor (3). The output end of the second motor (3) is equipped with a rotating shaft (31). The rotating shaft (31) rotates vertically and is mounted on the inside of the drying cylinder (2). Stirring rods (4) are evenly installed on the surface of the rotating shaft (31). The stirring rods (4) are horizontally arranged. Multiple stirring rods (4) are arranged in layers. An end cap (5) is installed at the outlet of the feed pipe (24). The end cap (5) seals the outlet of the feed pipe (24). The end cap (5) is flush with the inner wall of the drying cylinder (2). Particle extrusion holes (51) are evenly opened on the surface of the end cap (5). The bottom stirring rods (4) correspond to the feed pipe (24).

2. The rotary flash hot air dryer according to claim 1, characterized in that: A first motor (26) is fixed to the outer end of the feed pipe (24), and a spiral conveying rod (27) is installed at the output end of the first motor (26). The spiral conveying rod (27) is rotated inside the feed pipe (24).

3. A rotary flash hot air dryer according to claim 2, characterized in that: A hopper (25) is provided above one end of the feed pipe (24) near the first motor (26). The hopper (25) has a structure that is larger at the top and smaller at the bottom. The hopper (25) is connected to the inside of the feed pipe (24), and the top of the hopper (25) is open.

4. A rotary flash hot air dryer according to claim 1, characterized in that: The bottommost stirring rod (4) is provided with a docking hole (41) at its end, and the docking hole (41) is hollow with its end open.

5. A rotary flash hot air dryer according to claim 4, characterized in that: A slide rod (6) is slidably installed at the end of the docking hole (41), and a scraper (7) is vertically arranged at the outer end of the slide rod (6). The scraper (7) is in contact with the inner wall of the drying cylinder (2), and the end of the scraper (7) is at the same height as the end cover (5).

6. A rotary flash hot air dryer according to claim 5, characterized in that: A spring (8) is provided inside the docking hole (41), and one end of the spring (8) is in contact with the end surface of the slide rod (6) away from the scraper rod (7).

7. A rotary flash hot air dryer according to claim 1, characterized in that: The top of the drying cylinder (2) is provided with a discharge pipe (21), and the end of the discharge pipe (21) is connected to the cyclone separator.

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