Rice seed drying and impurity removing equipment
By designing a rice seed drying and decontamination equipment including a drying cylinder, a feed cone cylinder, a feed pipe, an air inlet duct and an exhaust pipe, a hot air flow is used to form a cyclone and an external cyclone, and the heating and exhaust of rice seeds is optimized, and the problems of local uneven heat, physical damage, high energy consumption and large area of the existing rice seed drying methods are solved, and efficient continuous operation and ideal drying effects are achieved.
Patent Information
- Application Number
- CN202510460650.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2025-06-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing rice seed drying methods have problems such as local uneven heat, physical damage, high energy consumption, and large equipment footprint, making it difficult to achieve efficient continuous operation and ideal drying effects.
A rice seed drying and decomposition equipment was designed, including a drying cylinder, a storage cone cylinder, a feed pipe, an inlet duct and an exhaust pipe. The hot air flow was used to form a cyclone and an external cyclone. The heat and exhaust of rice seeds were optimized through the dispersing cone plate and the shunt pipe, and the drying efficiency and utilization of the hot air flow were improved.
By optimizing the heating method of rice seeds, the equipment improves the drying efficiency and the utilization rate of hot air flow, reduces energy consumption, achieves uniform drying and efficient continuous operation of rice seeds, and reduces the equipment's footprint.
Smart Images
Figure CN120141087A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of agriculture and relates to a rice seed drying and impurity removing device. Background Art
[0002] The main purpose of rice seed drying is to reduce and control the moisture content of rice seeds to ensure their safe storage and germination rate during sowing. The common method of rice seed drying is hot air drying, that is, using hot air to blow and dry the spread rice seeds and turning them timely or in real time. The disadvantages of this method are as follows: turning while drying not only causes uneven local heating, but also physically damages the rice seeds, resulting in an increase in the cracking rate; on the other hand, it is difficult to operate efficiently and continuously, and the energy consumption is relatively high (using a conveyor belt to send rice seeds through the drying oven can achieve continuous operation, but the rice seeds cannot be effectively turned, resulting in high drying effect and energy consumption); furthermore, ideal rice seed drying generally adopts the process of preheating - drying - tempering - cooling - discharging grains, and the tempering time is required to be several times that of the drying time. The existing method of using a conveyor belt to pass through the drying oven requires a large site area for continuous operation; in summary, the existing rice seed drying methods are not ideal. Summary of the Invention
[0003] The purpose of the present invention is to provide a rice seed drying and impurity removing device for the above problems existing in the prior art. The technical problem to be solved by the present invention is how to optimize the drying effect of rice seeds.
[0004] The purpose of the present invention can be achieved by the following technical solutions: A rice seed drying and impurity removing device, characterized in that it includes a drying cylinder, a storage cone cylinder, a feed pipe, an air inlet pipe and an exhaust pipe. The lower end of the drying cylinder is connected to the large-diameter end of the storage cone cylinder. Part of the feed pipe is located inside the drying cylinder. The feed pipe is sleeved outside the exhaust pipe. The lower end of the exhaust pipe has a conical installation pipe. There are several scattered cone discs outside the installation pipe. The scattered cone discs are located below the outlet of the feed pipe. The scattered discs are arranged longitudinally at intervals. The large-diameter end of the installation pipe faces, and the large-diameter end of the scattered cone discs faces downward; from top to bottom, the outer diameters of the scattered cone discs gradually increase; several return holes are opened on the pipe wall of the installation pipe; the lower end of the storage cone cylinder has a discharge port.
[0005] Further, the airflow at the outlet of the air inlet pipe enters the drying cylinder in the tangential direction of the drying cylinder.
[0006] Further, a flow dividing pipe is arranged inside the installation pipe. The upper end of the flow dividing pipe is connected to the inner wall of the upper end of the installation pipe. The lower end of the installation pipe extends to the connection position between the storage cone cylinder and the drying cylinder.
[0007] Further, the flow dividing pipe is a conical pipe with a larger diameter at the upper end and a smaller diameter at the lower end.
[0008] Further, a contraction part is provided at the outlet of the feed pipe.
[0009] Further, an exhaust valve is provided at the outlet of the exhaust pipe.
[0010] Further, the feed pipe is connected to a feed hopper.
[0011] The paddy seeds to be dried are put into the drying cylinder from the feed hopper through the feed pipe. The hot air flow enters the drying cylinder tangentially from the intake pipe and forms a cyclone inside the drying cylinder. After the paddy seeds fall from the discharge pipe, they pass through the dispersion cone plates with gradually increasing outer diameters from top to bottom in sequence. The paddy seeds are dried under the action of the hot air flow. In order to further extend the time for the paddy seeds to fall and sink to the bottom, and also to enable the paddy seeds to have better contact with the hot air flow, a plurality of dispersion cone plates are longitudinally arranged at intervals outside the installation pipe, and their diameters gradually increase from top to bottom. In this way, the paddy seeds are in a vertical falling state between the longitudinally adjacent dispersion cone plates, with a relatively large windward area and heat-receiving area. After being heated, the paddy seeds are piled up in the storage cone cylinder for tempering, and are discharged at the discharge port at a speed equivalent to the feeding speed to ensure a certain accumulation amount in the storage cone cylinder.
[0012] When the shunt pipe is provided, part of the air flow can enter the shunt pipe and be discharged externally, and the other part enters through the installation pipe outside the shunt pipe and is discharged from the return holes, realizing lateral external discharge. This lateral external discharge exerts an air flow effect from the inside to the outside on the paddy seeds falling vertically between the adjacent dispersion cone plates, greatly improving the drying efficiency. In addition, the utilization rate of the hot air flow is also improved, realizing an increase in the wind-exposed time and frequency of the paddy seeds.
[0013] When the shunt pipe is not provided, part of the air flow can also escape externally at the shunt holes, but the escape amount and air flow intensity are relatively small.
[0014] This device is structurally similar to a cyclone dust collector. The hot air flow forms an external cyclone from top to bottom outside the installation pipe to retard the air flow to improve the heat-receiving efficiency and duration. The sinking air flow is affected by the conical structure of the storage cone cylinder and forms a small cyclone from bottom to top below the installation pipe. The small cyclone carries rice chaff and dust out for discharge. Of course, some rice chaff and dust will still re-enter the storage cone cylinder from the return holes, but generally it is a trend of external discharge. Description of the Drawings
[0015] Figure 1 is a perspective view of the drying and impurity-removing device.
[0016] Figure 2 is a cross-sectional view of the drying and impurity-removing device.
[0017] In the figure, 1 is a drying cylinder; 2 is a material storage conical cylinder; 3 is a feed pipe; 4 is an air inlet pipe; 5 is an exhaust pipe; 6 is an installation pipe; 7 is a dispersion conical disc; 8 is a return hole; 9 is a shunt pipe; 10 is a contraction part; 11 is an exhaust valve; 12 is a feed hopper. Detailed implementation mode
[0018] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.
[0019] As Figure 1 and Figure 2 shown in the rice seed drying and impurity removing equipment, which includes a drying cylinder 1, a material storage conical cylinder 2, a feed pipe 3, an air inlet pipe 4 and an exhaust pipe 5. The lower end of the drying cylinder 1 is connected to the large-diameter end of the material storage conical cylinder 2. Part of the feed pipe 3 is located inside the drying cylinder 1. The feed pipe 3 is sleeved outside the exhaust pipe 5. The lower end of the exhaust pipe 5 has a conical installation pipe 6. There are several dispersion conical discs 7 outside the installation pipe 6. The dispersion conical discs 7 are located below the outlet of the feed pipe 3. The dispersion discs are arranged longitudinally at intervals. The large-diameter end of the installation pipe 6 faces, and the large-diameter end of the dispersion conical disc 7 faces downwards; from top to bottom, the outer diameter of each dispersion conical disc 7 gradually increases; several return holes 8 are opened on the pipe wall of the installation pipe 6; the lower end of the material storage conical cylinder 2 has a discharge port, and the feed pipe 3 is connected to a feed hopper 12.
[0020] The air flow at the outlet of the air inlet pipe 4 enters the drying cylinder 1 in the tangential direction of the drying cylinder 1, so as to form a downward cyclone in the drying cylinder 1.
[0021] A shunt pipe 9 is arranged inside the installation pipe 6. The upper end of the shunt pipe 9 is connected to the inner wall of the upper end of the installation pipe 6, and the lower end of the installation pipe 6 extends to the connection position between the material storage conical cylinder 2 and the drying cylinder 1.
[0022] The shunt pipe 9 is a conical pipe with a larger diameter at the upper end and a smaller diameter at the lower end, which is an effective air guiding structure, so that the intensity of the air flow discharged from the shunt holes is relatively large.
[0023] There is a contraction part 10 at the outlet of the feed pipe 3, which on the one hand delays the feeding, and on the other hand makes full use of the uppermost dispersion conical disc 7.
[0024] An exhaust valve 11 is arranged at the outlet of the exhaust pipe 5, which is used to control the exhaust volume, and thus control the air flow intensity of the shunt holes.
[0025] The paddy seeds to be dried are put into the drying cylinder 1 from the feed hopper 12 and enter through the feed pipe 3. The hot air flow enters the drying cylinder 1 tangentially from the intake pipe, forming a cyclone inside the drying cylinder 1. After the paddy seeds fall from the discharge pipe, they pass through the respective dispersion cone plates 7 with gradually increasing outer diameters from top to bottom in sequence. The paddy seeds are dried under the action of the hot air flow. In order to further extend the time for the paddy seeds to fall and settle to the bottom and to enable the paddy seeds to have better contact with the hot air flow, a plurality of dispersion cone plates 7 are longitudinally arranged at intervals outside the installation pipe 6, and their diameters gradually increase from top to bottom. In this way, the paddy seeds are in a vertical falling state between the longitudinally adjacent dispersion cone plates 7, with a relatively large windward area and heat-receiving area. After being heated, the paddy seeds are accumulated in the storage cone cylinder 2 for tempering and are discharged at the discharge port at a speed equivalent to the feeding speed to ensure a certain accumulation amount in the storage cone cylinder 2.
[0026] When the shunt pipe 9 is provided, part of the air flow can enter the shunt pipe 9 and be discharged externally, while the other part enters through the installation pipe 6 outside the shunt pipe 9 and is discharged from the return holes 8, achieving lateral external discharge. This lateral external discharge exerts an air flow action from the inside to the outside on the paddy seeds that are falling vertically between the adjacent dispersion cone plates 7, greatly improving the drying efficiency. In addition, the utilization rate of the hot air flow is also improved, realizing an increase in the time and frequency of the paddy seeds being affected by the wind.
[0027] When the shunt pipe 9 is not provided, it is also possible to achieve partial air flow escaping externally at the shunt holes, but the escape amount and air flow intensity are relatively small.
[0028] This device is structurally similar to a cyclone dust collector. The hot air flow forms an outer cyclone from top to bottom outside the installation pipe 6 to retard the air flow to improve the heat-receiving efficiency and duration. The sinking air flow is affected by the conical structure of the storage cone cylinder 2 and forms a small cyclone from bottom to top below the installation pipe 6. The small cyclone carries rice chaff and dust out for discharge. Of course, some rice chaff and dust will still re-enter the storage cone cylinder 2 from the return holes 8, but generally the trend is for external discharge.
[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A rice seed drying and impurity removal device, characterized in that: The invention comprises a drying cylinder (1), a material storage cone cylinder (2), a feed pipe (3), an air inlet pipe (4) and an exhaust pipe (5), wherein the lower end of the drying cylinder (1) is connected to the large diameter end of the material storage cone cylinder (2), the feed pipe (3) is partially located inside the drying cylinder (1), the feed pipe (3) is sleeved outside the exhaust pipe (5), the lower end of the exhaust pipe (5) is provided with a conical installation pipe (6), the installation pipe (6) is provided with a plurality of dispersion cone disks (7), the dispersion cone disks (7) are located below the outlet of the feed pipe (3), the dispersion cone disks (7) are arranged alternately in the longitudinal direction, the large diameter end of the installation pipe (6) faces upward, and the large diameter end of the dispersion cone disk (7) faces downward; from top to bottom, the outer diameter of each dispersion cone disk (7) gradually increases; a plurality of reflux holes (8) are opened on the pipe wall of the installation pipe (6); the lower end of the material storage cone cylinder (2) is provided with a discharge port.
2. The rice seed drying and impurity removal equipment according to claim 1, characterized in that: The airflow at the outlet of the air inlet pipe (4) enters the drying cylinder (1) in the tangential direction of the drying cylinder (1).
3. The rice seed drying and impurity removal equipment according to claim 2, characterized in that: A shunt pipe (9) is arranged inside the installation pipe (6), the upper end of the shunt pipe (9) is connected to the inner wall of the upper end of the installation pipe (6), and the lower end of the installation pipe (6) extends to the connection position between the material storage cone (2) and the drying cylinder (1).
4. The rice seed drying and impurity removal equipment according to claim 3, characterized in that: The diverter pipe (9) is a conical pipe with an upper end having a larger diameter than a lower end.
5. A rice seed drying and impurity removal device according to claim 1, 2, 3 or 4, characterized in that: The outlet of the feed pipe (3) is provided with a contraction portion (10).
6. A rice seed drying and impurity removal device according to claim 1 or 2 or 3 or 4, characterized in that: An exhaust valve (11) is provided at the outlet of the exhaust pipe (5).
7. The rice seed drying and impurity removal equipment according to claim 1, 2, 3 or 4, characterized in that: The feed pipe (3) is connected to a feed hopper (12).