A drying device suitable for water-containing straw powder

Abstract

The utility model discloses a kind of drying device suitable for water-containing straw powder, including cylindrical dryer cylinder, support is symmetrically arranged in the lower part of dryer cylinder two sides, the upper surface of one side of dryer cylinder is provided with feed hopper, the outside of dryer cylinder is provided with dryer jacket, the lower surface of dryer jacket is connected with the natural gas combustion engine of the side of dryer cylinder by hot gas straight-through pipeline, hot gas straight-through pipeline is also communicated with the feed side of dryer cylinder by air inlet pipeline, the hot gas flow end of dryer jacket is communicated with air inlet pipeline by heat recovery pipeline. The dryer of the present application can effectively improve the drying efficiency of water-containing straw powder, reduce energy consumption, and is suitable for large-scale industrial production through the synergistic effect of dryer jacket heating, stirring paddle pushing and hot air circulation system.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically a drying device suitable for drying straw powder containing moisture. Background Technology

[0002] Straw, as an important biomass resource, is rich in chemical components, including elements such as nitrogen, phosphorus, potassium, calcium, and magnesium, as well as organic matter and crude fiber. Straw has wide applications in agriculture, industry, and energy, such as as animal feed, biomass fuel, and raw material for papermaking and furniture manufacturing. In these applications, straw typically needs to be crushed and dried to improve its utilization rate and product quality.

[0003] After being crushed, straw typically forms powdery particles. These particles are prone to absorbing moisture and becoming damp during storage or further processing, affecting their subsequent performance. Therefore, efficient and uniform drying of moisture-containing straw powder is a crucial step in biomass processing.

[0004] While existing drying technologies can achieve basic drying functions, they still have some shortcomings when processing straw powder. Specifically, existing drying equipment generally suffers from low thermal efficiency and insufficient utilization of heat energy. The main reasons are: the heat exchange efficiency of traditional single-stage hot air systems is insufficient, resulting in the direct emission of large amounts of high-temperature flue gas and energy waste; and the material is heated unevenly, with both local overheating and underheating occurring, affecting the drying quality. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a drying device suitable for moisture-containing straw powder. After the hot air completes the heat exchange in the jacket of the dryer, it can still enter the interior of the dryer and directly contact the material, making full use of the residual heat and reducing energy waste. This can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drying device suitable for drying straw powder containing moisture, comprising a cylindrical dryer body, with supports symmetrically arranged on the lower parts of both sides of the dryer body, a feed hopper arranged on the upper surface of one side of the dryer body, a dryer jacket arranged on the outer side of the dryer body, the lower surface of the dryer jacket being connected to a natural gas burner located on the side of the dryer body via a hot gas direct pipe, the hot gas direct pipe also being connected to the feed side of the dryer body via an air inlet pipe, and the hot gas flow end of the dryer jacket being connected to the air inlet pipe via a hot gas recovery pipe.

[0007] As a preferred embodiment of this utility model, a stirring shaft is horizontally rotatably arranged inside the dryer cylinder, and a plurality of stirring paddles are evenly arranged on the stirring shaft. One end of the stirring shaft is connected to the output shaft of a motor reducer arranged on the outside of the dryer cylinder through a coupling, and the other end of the stirring shaft is connected to a bearing arranged on the dryer cylinder.

[0008] As a preferred embodiment of this invention, a material lifting hopper is provided on the outer side of the stirring paddle.

[0009] As a preferred embodiment of this utility model, the material lifting hopper is provided with a scraping brush.

[0010] As a preferred embodiment of this utility model, an airlock is connected below the discharge port of the dryer cylinder, and the outlet of the airlock is connected to a screw propeller.

[0011] As a preferred embodiment of this utility model, a cyclone separator is connected above the discharge port of the dryer cylinder via an air duct, and the cyclone separator is connected to the air blower.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: A dryer jacket is provided on the outer side of the dryer cylinder. The hot air flowing inside the dryer jacket is connected to the feed end of the dryer cylinder via a hot air recovery pipe at its end. This design allows the hot air to complete heat exchange within the dryer jacket and still directly contact the material inside the dryer, fully utilizing residual heat and reducing energy waste. The hot air direct pipe, while supplying hot air to the dryer jacket, also introduces hot air generated from natural gas combustion into the interior of the dryer cylinder through the air inlet pipe, ensuring direct contact with the material and efficient heat transfer. This direct contact with the material enhances heat transfer, accelerates the drying speed, and is particularly suitable for drying powder materials, significantly improving drying efficiency and reducing energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Dryer cylinder, 2. Dryer jacket, 3. Natural gas burner, 4. Hot gas direct pipe, 5. Air inlet pipe, 6. Hot gas recovery pipe, 7. Feed hopper, 8. Motor reducer, 9. Agitator shaft, 10. Agitator paddle, 11. Material lifting hopper, 12. Airlock, 13. Screw propeller, 14. Exhaust pipe, 15. Shackle, 16. Exhaust fan, 17. Support frame. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1 This utility model provides a technical solution: a drying device suitable for drying straw powder containing water, including a cylindrical dryer body 1, with supports 17 symmetrically arranged on the lower part of both sides of the dryer body 1, and a trumpet-shaped feed hopper 7 arranged on the upper surface of one side of the dryer body 1 for feeding the straw powder containing water into the dryer body 1.

[0017] A dryer jacket 2 is provided on the outside of the dryer cylinder 1. The hot air flow end of the dryer jacket 2 is connected to the air inlet pipe 5 through the hot air recovery pipe 6. The hot air flowing inside the dryer jacket 2 is connected to the feed end of the dryer cylinder 1 through the hot air recovery pipe 6 at the end. This design allows the hot air to enter the dryer and directly contact the material after completing heat exchange inside the dryer jacket 6, making full use of residual heat and reducing energy waste.

[0018] The lower surface of the dryer jacket 2 is connected to the natural gas burner 3 located on the side of the dryer cylinder 1 via a hot gas direct pipe 4. The hot gas direct pipe 4 is also connected to the feed side of the dryer cylinder 1 via an air inlet pipe 5. Both the hot gas direct pipe 4 and the hot gas recovery pipe 6 are equipped with corresponding air pumps for transporting hot gas. While supplying hot gas to the dryer jacket 2, the hot gas direct pipe 4 also introduces the hot gas generated by the combustion of natural gas into the interior of the dryer cylinder 1 through the air inlet pipe 5, ensuring direct contact with the material and efficient heat transfer. This direct contact with the material enhances the heat transfer effect, accelerates the drying speed, and is particularly suitable for drying powder materials, significantly improving drying efficiency and reducing energy consumption.

[0019] In a preferred embodiment, a horizontally rotating stirring shaft 9 is installed inside the dryer cylinder 1. Several stirring paddles 10 are evenly arranged on the stirring shaft 9, preferably in a spiral shape. These paddles, while stirring the moisture-containing straw powder, spirally convey it to the discharge port of the dryer cylinder 1. One end of the stirring shaft 9 is connected to the output shaft of a motor reducer 8 located outside the dryer cylinder 1 via a coupling. The other end of the stirring shaft 9 is connected to a bearing located on the dryer cylinder 1. The motor reducer 8 drives the stirring paddles 10 to rotate via the stirring shaft 9, thus stirring the moisture-containing straw powder and improving drying efficiency.

[0020] In a further preferred embodiment, a lifting hopper 11 is provided on the outer side of the stirring paddle 10. In traditional dryer designs, the effective drying area on the outer wall of the dryer cylinder is typically limited to one-quarter of the cylinder wall, which restricts the contact area between the material and the hot wall, thus affecting the drying rate. To improve drying efficiency, this invention adds a lifting hopper to the outermost end of each blade of the stirring shaft. This design expands the area available for drying to one-half or even two-thirds, significantly increasing the contact area between the material and the hot wall. Specifically, the lifting hopper can lift the material from the bottom of the cylinder to a higher position, distributing it evenly over a wider area of ​​the cylinder wall, thereby improving heat exchange efficiency.

[0021] Furthermore, the feeding hopper 11 is equipped with a scraper brush, which is in close contact with the inner wall of the cylinder to ensure that no material remains on the cylinder wall, thereby maximizing the utilization of the entire drying area of ​​the cylinder. The scraper brush design not only helps to clean the cylinder wall, but also prevents material from clumping, further improving the drying effect.

[0022] In a preferred embodiment, a closed-loop valve 12 is connected below the discharge port of the dryer cylinder 1, and a screw propeller 13 is connected to the outlet of the closed-loop valve 12. A cyclone separator 15 is connected above the discharge port of the dryer cylinder 1 via an exhaust pipe 14, and the cyclone separator 15 is connected to an exhaust fan 16. In traditional dryer designs, discharge and exhaust are achieved through a fan connected to an opening at the bottom of the cylinder, with a cyclone separator and bag filter connected in between. This single-point discharge method can cause material blockage, leading to material accumulation at the discharge port, preventing moisture from escaping, reducing the dryer's drying efficiency, and increasing the load on the fan. In this design, a closed-loop valve 12 is connected to the funnel-shaped discharge port of the dryer cylinder 1, and a screw propeller 13 is connected to the outlet of the closed-loop valve 12, allowing most of the material to be discharged to the next stage by compression. Meanwhile, an opening is made at the top of the dryer cylinder 1, and a duct 14 is used to connect the cyclone separator 15 and the blower 16. This allows water vapor to be drawn away, and the material entrained in the water vapor is collected by the cyclone separator 15. The collected material can then enter the screw propeller 13 through a pipeline (not shown in the attached diagram), and most of the material will go to the next stage.

[0023] The air pump, natural gas burner 3, motor reducer 8, screw propeller 13, induced draft fan 16, etc. used in this application are all powered by an external power source and controlled by an external control switch or a commonly used controller such as a microcontroller or PLC controller. Furthermore, the air pump, natural gas burner 3, motor reducer 8, screw propeller 13, induced draft fan 16, and controllers used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, circuit connections, and control methods of the controller for each electronic component are all known technologies and will not be described in detail here.

[0024] The dryer described in this application can effectively improve the drying efficiency of moisture-containing straw powder and reduce energy consumption through the synergistic effect of dryer jacket heating, stirring paddle pushing and turning, and hot air circulation system, making it suitable for large-scale industrial production.

[0025] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying device suitable for drying straw powder containing moisture, comprising a cylindrical dryer body (1), wherein supports (17) are symmetrically arranged on the lower parts of both sides of the dryer body (1), characterized in that: A feed hopper (7) is provided on the upper surface of one side of the dryer cylinder (1), and a dryer jacket (2) is provided on the outer side of the dryer cylinder (1). The lower surface of the dryer jacket (2) is connected to a natural gas burner (3) provided on the side of the dryer cylinder (1) through a hot gas direct pipe (4). The hot gas direct pipe (4) is also connected to the feed side of the dryer cylinder (1) through an air inlet pipe (5). The hot gas flow end of the dryer jacket (2) is connected to the air inlet pipe (5) through a hot gas recovery pipe (6).

2. The drying device for moisture-containing straw powder according to claim 1, characterized in that: The dryer cylinder (1) is horizontally rotatably equipped with a stirring shaft (9), and a number of stirring paddles (10) are evenly arranged on the stirring shaft (9). One end of the stirring shaft (9) is connected to the output shaft of the motor reducer (8) arranged on the outside of the dryer cylinder (1) through a coupling, and the other end of the stirring shaft (9) is connected to the bearing arranged on the dryer cylinder (1).

3. A drying device suitable for drying moisture-containing straw powder according to claim 2, characterized in that: A material lifting hopper (11) is provided on the outside of the stirring paddle (10).

4. A drying device suitable for moisture-containing straw powder according to claim 3, characterized in that: The material lifting hopper (11) is equipped with a scraper brush.

5. A drying device for moisture-containing straw powder according to claim 1, characterized in that: A shut-off valve (12) is connected below the discharge port of the dryer cylinder (1), and a screw propeller (13) is connected to the outlet of the shut-off valve (12).

6. A drying device for moisture-containing straw powder according to claim 1, characterized in that: A cyclone separator (15) is connected above the discharge port of the dryer cylinder (1) via an air duct (14), and the cyclone separator (15) is connected to the blower (16).

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