Drying machine with grading function

Abstract

The utility model relates to the technical field of spray dryers, and discloses a dryer with a grading function, which comprises a hot blast stove, an induced draft fan, a discharge bin and a grading pipeline. The hot-blast stove is communicated with the outside so as to introduce outside air into the hot-blast stove and heat the outside air into hot air; the induced draft fan is connected with the hot blast stove and is used for leading out hot air; the discharging bin is communicated with the induced draft fan, and materials in the storage bin can be taken away by hot air; and the grading pipeline is connected with the induced draft fan, so that the hot air can circulate in the grading pipeline, and the grading pipeline can allow materials passing through to be gradually reduced in size in the conveying direction of the grading pipeline, so that the materials with different sizes in the hot air are screened. And the materials can be classified into different grades according to the sizes through classified screening. And subsequent use of the materials is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of spray dryer technology, and in particular to a dryer with a grading function. Background Technology

[0002] The primary function of a dryer is to remove moisture or other solvents from materials. In many industrial production and daily life scenarios, the moisture content of materials affects their quality, shelf life, processing performance, and many other aspects. For example, in the food industry, foods like grains and dried fruits are prone to mold and spoilage if their moisture content is too high. Reducing the moisture content through a dryer can extend the shelf life of these foods. In the chemical industry, some chemical raw materials may contain a significant amount of moisture after synthesis, requiring drying before further processing or packaging. However, different industries have strict requirements regarding the particle size of their products. Directly drying materials would result in a mixture of particles of different sizes. Utility Model Content

[0003] The present invention aims to provide a dryer with a grading function to solve the technical problems raised in the prior art.

[0004] The technical problem solved by this utility model embodiment is addressed by the following technical solution:

[0005] A dryer with a grading function is provided, comprising:

[0006] A hot air furnace, which is connected to the outside world to introduce outside air into the furnace and heat the outside air into hot air;

[0007] An induced draft fan is connected to the hot air furnace and is used to exhaust hot air.

[0008] The discharge hopper is connected to the induced draft fan, and the material in the storage hopper can be carried away by hot air;

[0009] A grading pipe is connected to the induced draft fan so that hot air can circulate within the grading pipe, and the size of the material that can pass through the grading pipe gradually decreases along the transmission direction of the grading pipe, so as to screen materials of different sizes in the hot air.

[0010] In some embodiments, a first pipe is provided between the induced draft fan and the discharge hopper. The first pipe is used to connect the induced draft fan and the discharge hopper. The hot air from the induced draft fan can be transmitted through the first pipe, and the material in the discharge hopper can enter the first pipe and move with the hot air in the first pipe.

[0011] In some embodiments, the first pipe and the graded pipe are connected, and the hot air can enter the graded pipe through the first pipe.

[0012] In some embodiments, the graded conduit includes a second conduit, a third conduit, and a fourth conduit, which are connected sequentially, and the diameters of the second conduit, the third conduit, and the fourth conduit gradually decrease.

[0013] In some embodiments, a first screen is provided between the second pipe and the third pipe, and a second screen is provided between the third pipe and the fourth pipe, wherein the mesh diameter of the first screen is larger than the mesh diameter of the second screen.

[0014] In some embodiments, a feeding pump is provided on the discharge hopper, and the feeding pump is used to guide the material in the discharge hopper into the first pipe.

[0015] Compared with existing technologies, the dryer with grading function provided in this embodiment includes a hot air furnace, an induced draft fan, a discharge hopper, and a grading pipe. The hot air furnace is connected to the outside environment to introduce and heat outside air into it. The induced draft fan is connected to the hot air furnace and is used to exhaust the hot air. The discharge hopper is connected to the induced draft fan, allowing the hot air to carry away the material in the hopper. The grading pipe is connected to the induced draft fan, enabling the hot air to circulate within it. Along the transmission direction of the grading pipe, the size of the material allowed to pass through gradually decreases, thus screening materials of different sizes in the hot air. Through grading and screening, materials can be separated into different grades according to size, facilitating subsequent use of the materials. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the structure of a dryer with a grading function provided in one embodiment of the present invention.

[0018] Figure label:

[0019] 100. Dryer with grading function; 10. Hot air furnace; 20. Exhaust fan; 30. Discharge hopper; 31. Feed pump; 40. Grading pipe; 41. Second pipe; 411. First screen; 42. Third pipe; 421. Second screen; 43. Fourth pipe; 50. First pipe. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0022] The following combination Figure 1 The present application provides a detailed description of the dryer with a grading function through specific embodiments.

[0023] Please also refer to Figure 1 , Figure 1 This is a schematic diagram of a dryer with a grading function provided in one embodiment of the present invention. The dryer 100 with a grading function provided in one embodiment of the present invention includes a hot air furnace 10, an induced draft fan 20, a discharge bin 30, and a grading pipe 40. The hot air furnace 10 is connected to the outside environment to introduce outside air into the furnace and heat it into hot air; the induced draft fan 20 is connected to the hot air furnace 10 and is used to exhaust the hot air; the discharge bin 30 is connected to the induced draft fan 20, allowing the material in the bin to be carried away by the hot air; the grading pipe 40 is connected to the induced draft fan 20 so that the hot air can circulate within the grading pipe 40, and along the transmission direction of the grading pipe 40, the size of the material allowed to pass through the grading pipe 40 gradually decreases, thereby screening materials of different sizes in the hot air.

[0024] The hot air furnace 10 first introduces and heats outside air to form hot air. The induced draft fan 20 then extracts the hot air from the furnace 10 and circulates it within the system. In the discharge hopper 30, the hot air comes into contact with the material. Due to the speed and force of the airflow, it entrains the material, carrying it into the grading pipe 40. Once the hot air carrying the material enters the grading pipe 40, its special design allows for a gradual decrease in the size of the material that can pass through along its transport direction. This ensures that only smaller volumes of material can continue to move forward. In this way, materials of different sizes are screened out at different locations within the grading pipe 40. Through grading and screening, materials can be separated into different grades according to size, facilitating subsequent use.

[0025] In some embodiments, a first pipe 50 is provided between the induced draft fan 20 and the discharge bin 30. The first pipe 50 is used to connect the induced draft fan 20 and the discharge bin 30. Hot air from the induced draft fan 20 can be transmitted through the first pipe 50, and material in the discharge bin 30 can enter the first pipe 50 and move with the hot air in the first pipe 50.

[0026] Hot air generated by the hot air furnace 10 flows towards the discharge hopper 30 through the first pipe 50 under the action of the induced draft fan 20. The induced draft fan 20 acts as a power source, driving the hot air to be stably transmitted in the pipe, ensuring that the hot air reaches the discharge hopper 30. This process is similar to using a hairdryer to blow hot air towards a target object through an extension tube. The discharge hopper 30 contains the material to be dried. When hot air enters the discharge hopper 30 through the first pipe 50, the flow rate and pressure of the hot air will carry the material into the first pipe 50. This is because a certain airflow field is formed within the first pipe 50, and the material is entrained under the action of this airflow field. Thus, the material is dried while being moved.

[0027] In some embodiments, the first pipe 50 and the grading pipe 40 are connected, and hot air can enter the grading pipe 40 through the first pipe 50. This connection allows the material to enter the grading pipe 40 as intended, thereby initiating the grading and drying process. Once inside the grading pipe 40, the material is affected by the internal structure and airflow distribution of the grading pipe 40 and begins to be categorized according to size.

[0028] In some embodiments, the graded conduit 40 includes a second conduit 41, a third conduit 42, and a fourth conduit 43, which are connected sequentially, and the diameters of the second conduit 41, the third conduit 42, and the fourth conduit 43 gradually decrease.

[0029] When hot air carrying material enters the second pipe 41 of the grading pipe 40 from the first pipe 50, the flow rate of the hot air is relatively slow at this stage due to the relatively large diameter of the second pipe 41, allowing larger materials to move smoothly within the pipe. As the pipe extends, the material enters the smaller diameter third pipe 42. At this point, the flow rate of the hot air increases due to the narrowing of the pipe, allowing smaller materials to continue to be carried forward, while some larger materials gradually settle or become trapped near the connection between the second and third pipes 41 and 42 due to changes in flow rate and their own gravity. When the material enters the even smaller diameter fourth pipe 43, only smaller materials can pass through under the entrainment of the faster-flowing hot air, thus achieving the grading of materials of different sizes.

[0030] In some embodiments, a first screen 411 is provided between the second pipe 41 and the third pipe 42, and a second screen 421 is provided between the third pipe 42 and the fourth pipe 43, wherein the mesh diameter of the first screen 411 is larger than the mesh diameter of the second screen 421.

[0031] The arrangement of the first screen 411 and the second screen 421 forms a dual screening mechanism. When material flows from the second pipe 41 to the third pipe 42, the first screen 411 first screens the material. Due to its larger mesh diameter, it can intercept larger-sized materials, allowing smaller-sized materials to pass through and enter the third pipe 42. Then, when the material flows from the third pipe 42 to the fourth pipe 43, the second screen 421, with its smaller mesh diameter, screens again, intercepting the relatively larger portion of the material remaining after screening by the first screen 411. Only smaller-sized materials can enter the fourth pipe 43. This dual screening greatly improves the accuracy of grading, enabling more detailed separation of materials into different grades according to size.

[0032] In some embodiments, a feed pump 31 is provided on the discharge hopper 30, which is used to guide the material in the discharge hopper 30 into the first pipe 50. The feed pump 31 can provide power to the discharge hopper 30 to drive the material into the first pipe 50.

[0033] It should be noted that the dryer 100 with grading function provided in this embodiment of the present invention only shows the part related to the technical problem to be solved by this embodiment of the present invention. It can be understood that the dryer 100 with grading function provided in this embodiment of the present invention also includes other structures for realizing the function of the dryer 100 with grading function.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dryer with a grading function, characterized in that, include: A hot air furnace, which is connected to the outside world to introduce outside air into the furnace and heat the outside air into hot air; An induced draft fan is connected to the hot air furnace and is used to exhaust hot air. The discharge hopper is connected to the induced draft fan, and the material in the discharge hopper can be carried away by hot air; A grading pipe is connected to the induced draft fan so that hot air can circulate within the grading pipe, and the size of the material that can pass through the grading pipe gradually decreases along the transmission direction of the grading pipe, so as to screen materials of different sizes in the hot air.

2. The dryer with a grading function according to claim 1, characterized in that, A first pipe is provided between the induced draft fan and the discharge hopper. The first pipe is used to connect the induced draft fan and the discharge hopper. The hot air of the induced draft fan can be transmitted through the first pipe, and the material in the discharge hopper can enter the first pipe and move with the hot air in the first pipe.

3. The dryer with a grading function according to claim 2, characterized in that, The first pipe and the graded pipe are connected, and the hot air can enter the graded pipe through the first pipe.

4. The dryer with a grading function according to claim 3, characterized in that, The graded pipeline includes a second pipeline, a third pipeline, and a fourth pipeline, which are connected sequentially, and the diameters of the second pipeline, the third pipeline, and the fourth pipeline gradually decrease.

5. The dryer with a grading function according to claim 4, characterized in that, A first screen is provided between the second pipe and the third pipe, and a second screen is provided between the third pipe and the fourth pipe. The mesh diameter of the first screen is larger than that of the second screen.

6. The dryer with a grading function according to claim 5, characterized in that, The discharge hopper is equipped with a feeding pump, which is used to guide the material in the discharge hopper into the first pipe.

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