A method for rapidly pelletizing small and irregular seeds

Abstract

The present invention discloses a method for rapid pelleting of small-grained heteromorphic seeds, the method comprising the following steps S1-S3: step S1, rotating a rotary kettle at a first speed until the pelletized seeds are ellipsoidal; step S2, according to the length of the pelletized seeds, putting suitable glass balls into the rotary kettle, and rotating the rotary kettle at a second speed; step S3, when the pelletized seeds are spherical, rotating the rotary kettle at a third speed, and increasing the frequency of water spraying and the frequency of seed coating powder delivery, until the diameter of the pelletized seeds reaches a preset requirement; the first speed, the second speed and the third speed are in an increasing relationship from front to back; during the process of steps S1-S3, the operation of water spraying and seed coating powder delivery is accompanied. In the present invention, by adding glass balls to the rotary kettle at an appropriate time, and changing the speed of the rotary kettle at an appropriate time, the rotary kettle has different speeds at different stages, which can effectively improve the quality and efficiency of the pelleting operation.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural seed pelleting, in particular to a method for quickly pelleting small-grained and irregular-shaped seeds. Background Art

[0002] Pelletizing technology is mainly used for seeds with small grains and irregular shapes. Insecticides, fungicides, fertilizers, plant growth regulators and solid (liquid) auxiliary materials are mechanically processed and coated on the seeds in an orderly and layered manner to make pelletized seeds with smooth surface, uniform size and large particles. The purpose is to change the shape of seeds, expand the volume of seeds, promote germination and plant growth, improve seed resistance, and significantly enhance the resistance of seeds to adverse environments, creating conditions for the mechanized precision sowing of small seeds and seeds with irregular shapes.

[0003] In the prior art, CN106489359A discloses a device for pelletizing seeds, which can spray water and supply powder into a rolling tank to form a seed coating layer on the surface of the seeds. However, for micro-shaped seeds (such as Figure 1 For irregular seeds with a thousand-grain weight of less than 10g and sharp edges and corners on the surface, the above-mentioned pelletizing equipment has great difficulty in pelletizing seeds. Due to their small size and irregular shape, these seeds are prone to multiple seeds sticking together during the pelletizing process, forming pelletized seed clusters. In addition, the seeds after pelletizing will have irregular shapes and poor appearance consistency, which is not conducive to subsequent sowing operations. For example, some particularly small or irregularly shaped seeds are difficult to achieve uniform pelletization during the pelletizing process due to their surface characteristics and size, which may affect the germination rate and field performance of the seeds. In addition, for micro-particle heteromorphic seeds, in order to improve the pelletizing quality, the pelletizing operation can only be carried out slowly, and the operating efficiency is very low. In order to meet the needs of large-scale sowing, it is necessary to increase the number of pelletizing equipment, which increases costs. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a method for quickly pelletizing small-grained and irregular-shaped seeds that can take into account both pelletizing quality and efficiency.

[0005] Technical solution: To achieve the above purpose, the method for rapidly pelletizing small-grained and irregular-shaped seeds of the present invention is used to pelletize small-grained and irregular-shaped seeds. The small-grained and irregular-shaped seeds of the present invention refer to irregular seeds with a thousand-grain weight of less than 10 g and sharp edges and corners on the surface. The method comprises:

[0006] The heteromorphic seeds to be pelletized are added into a rotary kettle, and water is sprayed into the rotary kettle and seed coating powder is added, so that the seed coating powder adheres to the surface of the heteromorphic seeds to form pelletized seeds; the pelletized seeds may refer to partially pelletized heteromorphic seeds or to pelletized heteromorphic seeds;

[0007] The method specifically comprises the following steps S1-S3:

[0008] Step S1, rotating the rotary kettle at a first speed until the pelletized seeds are ellipsoidal;

[0009] Step S2, according to the length of the pelletized seeds, putting suitable glass balls into the rotary kettle, and rotating the rotary kettle at a second speed;

[0010] Step S3, when the pelletized seeds are spherical, the rotary kettle is rotated at a third speed, and the water spraying frequency and the seed coating powder feeding frequency are increased until the diameter of the pelletized seeds reaches a preset requirement;

[0011] The first speed, the second speed and the third speed are in increasing relationship from front to back;

[0012] The processes of steps S1-S3 are accompanied by the operations of spraying water and adding seed coating powder.

[0013] Furthermore, the first rotational speed is 35 r / min; the second rotational speed is 45 r / min; and the third rotational speed is 60 r / min.

[0014] Furthermore, after the diameter of the pelletized seeds reaches a preset requirement, the method further comprises:

[0015] The pelletized seeds were dried with hot air at 40° until the surface pressure of the pelletized seeds reached 3N.

[0016] In this step, the rotary kettle rotates while using hot air to blow the pelletized seeds, which can increase the drying speed of the outer coating layer of the irregular seeds. On the one hand, it can prevent the coating layer of the pelletized seeds from being deformed during natural drying, and on the other hand, it can prevent the seeds from being wrapped in a wet coating layer for a long time and becoming moldy or germinated.

[0017] Furthermore, the operations of spraying water into the rotary kettle and adding seed coating powder are specifically as follows:

[0018] First, water is sprayed on the surface of the irregular seeds in the rotary kettle; after the surface of the irregular seeds is moistened, seed coating powder is added into the rotary kettle to form a seed coating layer on the surface of the irregular seeds;

[0019] Then, water is sprayed into the rotary kettle to moisten the seed coat of the irregular seeds, and seed coat powder is added again, and so on. In this way, the operations of spraying water and adding seed coat powder are performed alternately, so that the seed coat layer can be gradually enlarged, and the seed coat powder will not roll into a ball without a seed as the core.

[0020] Furthermore, the step S2 specifically includes the following steps S201-S203:

[0021] Step S201, sampling the pelletized seeds in the rotary kettle, and determining whether the sampled pelletized seeds have a phenomenon of multiple seeds adhering, and if so, proceeding to step S202;

[0022] Step S202, according to the length of the pelletized seeds in the rotary kettle at this time, glass balls with a diameter closest to the length of the pelletized seeds are added; in this step, the length of the pelletized seeds in the shape of a ball refers to the maximum length of the seeds;

[0023] Step S203, adjusting the rotation speed of the rotary kettle to a second rotation speed.

[0024] By adopting the above structure, the timing of placing the glass balls is accurately grasped, and the size of the glass balls is appropriate, so that the glass balls and the pelletized seeds can be fully mixed. The glass balls can effectively participate in the operation of impacting multi-seed seed clusters and assisting the operation of pelletized seeds in forming. The glass balls and the pelletized seeds will not be stratified, and the glass balls will not damage the seed coating layer.

[0025] In actual operation, glass balls of various specifications can be prepared. After determining the length of the pelletized seeds, glass balls with a diameter closest to the length are selected and placed in the rotary kettle.

[0026] Furthermore, the operation of adding the adapted glass balls into the rotary kettle in step S2 specifically includes the following steps S301-S302:

[0027] Step S301, determining the number of pelletized irregular seeds, and determining the number of glass balls to be added according to the number and the mixing ratio; the mixing ratio of the glass balls to the irregular seeds is between 1 / 3 and 1 / 2;

[0028] Step S302, according to the number of glass balls to be put in, a corresponding number of glass balls are put into the rotary kettle.

[0029] Furthermore, when the rotation speed of the rotary kettle is increased to the second rotation speed and the third rotation speed, the water spraying frequency and the seed coating powder supply frequency are increased according to the current rotation speed. In this way, it can be ensured that as the pelletized seeds become larger and larger, the supply of water and seed coating powder is sufficient. The water spraying frequency and the seed coating powder supply frequency can be set to be proportional to the rotation speed.

[0030] Beneficial effects: The method for rapidly pelletizing small-sized and irregular-shaped seeds of the present invention has the following beneficial effects:

[0031] (1) In the process of pelletizing the irregular seeds, glass balls are added to mix the glass balls with the pelletized seeds. In the subsequent rotation of the rotary kettle, the glass balls can collide with the adhered multi-seed clusters, so that the adhered pelletized seeds are separated into independent pelletized seeds, thereby preventing the multi-seed clusters from becoming larger and affecting the subsequent pelletizing operation.

[0032] (2) Glass balls have the characteristics of smooth surface and high hardness. After mixing them with pelletized seeds, seed coating powder will not adhere to the surface of the glass balls. When the rotary kettle rotates, the glass balls can promote the pelletized seeds to become spherical and make the coating layer formed on the outside of the irregular seeds dense. Not only does the consistency of the pelletized seeds improve, but the coating layer is also not easy to crack, dent, or fall off.

[0033] (3) By changing the operating speed of the rotary kettle at different stages of pelleting, the pelleting needs of each stage can be better met. When the rotary kettle rotates at the first speed, due to the slow rotation speed, the seed coating powder can adhere to the surface of the irregular seeds under the action of water, fully filling and compensating for the depressions, grooves and other features on the surface of the seeds to prevent the formation of hollow parts; when the rotary kettle rotates at the second speed, due to the high rotation speed, the glass balls can form a moderate impact force to fully separate the adhered pelletized seeds. At the same time, in the process of the pelletized seeds continuing to be coated with the seed coating agent and changing from an ellipsoid to a sphere, the glass balls can play a shaping role; when the rotary kettle rotates at the third speed, since the pelletized seeds are already spherical at this time, increasing the rotation speed and simultaneously increasing the water supply frequency and powder supply frequency can accelerate the enlargement of the pelletized seeds and improve the pelleting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a photo of a micro-sized heteromorphic seed;

[0035] Figure 2 The figure is a schematic diagram of the process of rapid pelleting of small and odd-shaped seeds. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] like Figure 2 The method for rapidly pelletizing small-grained and irregular-shaped seeds is used to pelletize small-grained and irregular-shaped seeds. The small-grained and irregular-shaped seeds in the present invention refer to irregular seeds with a thousand-grain weight of less than 10 g and sharp edges and corners on the surface. The method comprises:

[0038] The heteromorphic seeds to be pelletized are added into a rotary kettle, and water is sprayed into the rotary kettle and seed coating powder is added, so that the seed coating powder adheres to the surface of the heteromorphic seeds to form pelletized seeds; the pelletized seeds may refer to partially pelletized heteromorphic seeds or to pelletized heteromorphic seeds;

[0039] The method specifically comprises the following steps S1-S3:

[0040] Step S1, rotating the rotary kettle at a first speed until the pelletized seeds are ellipsoidal;

[0041] Step S2, according to the length of the pelletized seeds, putting suitable glass balls into the rotary kettle, and rotating the rotary kettle at a second speed;

[0042] Step S3, when the pelletized seeds are spherical, the rotary kettle is rotated at a third speed, and the water spraying frequency and the seed coating powder feeding frequency are increased until the diameter of the pelletized seeds reaches a preset requirement;

[0043] The first speed, the second speed and the third speed are in increasing relationship from front to back;

[0044] The processes of steps S1-S3 are accompanied by the operations of spraying water and adding seed coating powder.

[0045] The innovations of the above pelleting method are reflected in the following three aspects:

[0046] First, glass balls are added during the pelletizing process of the irregular seeds so that the glass balls are mixed with the pelletized seeds. During the subsequent rotation of the rotary kettle, the glass balls can collide with the adhered multi-seed clusters, separating the adhered pelletized seeds into independent pelletized seeds, thereby preventing the multi-seed clusters from becoming larger and affecting the subsequent pelletizing operations.

[0047] Second, the glass balls have the characteristics of smooth surface and high hardness. After mixing them with pelletized seeds, the seed coating powder will not adhere to the surface of the glass balls. When the rotary kettle rotates, the glass balls can promote the pelletized seeds to become spherical, and make the coating layer formed on the outside of the irregular seeds have a dense characteristic. Not only is the consistency of the pelletized seeds good, but the coating layer is also not easy to crack, dent, or fall off.

[0048] Third, by changing the operating speed of the rotary kettle at different stages of pelleting, it is more in line with the needs of pelleting at each stage. When the rotary kettle rotates at the first speed, due to the slow rotation speed, the seed coating powder can adhere to the surface of the irregular seeds under the action of water, fully filling and compensating for the depressions, grooves and other features on the surface of the seeds to prevent the formation of hollow parts; when the rotary kettle rotates at the second speed, due to the high rotation speed, the glass balls can form a moderate impact force to fully separate the adhered pelletized seeds, and at the same time, in the process of the pelletized seeds continuing to be coated with the seed coating agent and changing from an ellipsoid to a sphere, the glass balls can play a shaping role; when the rotary kettle rotates at the third speed, since the pelletized seeds are already spherical at this time, increasing the rotation speed and simultaneously increasing the water supply frequency and powder supply frequency can accelerate the enlargement of the pelletized seeds and improve the pelleting efficiency.

[0049] It can be seen that in the present invention, by adding glass balls into the rotary kettle at an appropriate time and changing the speed of the rotary kettle at an appropriate time, the rotary kettle has different rotation speeds at different stages, which can effectively improve the quality and efficiency of the pelletizing operation.

[0050] Preferably, the first rotational speed is 35 r / min; the second rotational speed is 45 r / min; and the third rotational speed is 60 r / min.

[0051] Preferably, after the diameter of the pelletized seeds in the above step S3 reaches a preset requirement, the following step S4 is further included:

[0052] Step S4, hot air drying the pelletized seeds with 40° hot air until the surface pressure of the pelletized seeds reaches 3N.

[0053] In this step, the rotary kettle rotates while using hot air to blow the pelletized seeds, which can increase the drying speed of the outer coating layer of the irregular seeds. On the one hand, it can prevent the coating layer of the pelletized seeds from being deformed during natural drying, and on the other hand, it can prevent the seeds from being wrapped in a wet coating layer for a long time and becoming moldy or germinated.

[0054] Preferably, the operations of spraying water into the rotary kettle and adding seed coating powder are specifically as follows:

[0055] First, water is sprayed on the surface of the irregular seeds in the rotary kettle; after the surface of the irregular seeds is moistened, seed coating powder is added into the rotary kettle to form a seed coating layer on the surface of the irregular seeds;

[0056] Then, water is sprayed into the rotary kettle to moisten the seed coat of the irregular seeds, and seed coat powder is added again, and so on. In this way, the operations of spraying water and adding seed coat powder are performed alternately, so that the seed coat layer can be gradually enlarged, and the seed coat powder will not roll into a ball without a seed as the core.

[0057] Preferably, the step S2 specifically includes the following steps S201-S203:

[0058] Step S201, sampling the pelletized seeds in the rotary kettle, and determining whether the sampled pelletized seeds have a phenomenon of multiple seeds adhering, and if so, proceeding to step S202;

[0059] Step S202, according to the length of the pelletized seeds in the rotary kettle at this time, glass balls with a diameter closest to the length of the pelletized seeds are added; in this step, the length of the pelletized seeds in the shape of a ball refers to the maximum length of the seeds;

[0060] Step S203, adjusting the rotation speed of the rotary kettle to a second rotation speed.

[0061] By adopting the above structure, the timing of placing the glass balls is accurately grasped, and the size of the glass balls is appropriate, so that the glass balls and the pelletized seeds can be fully mixed. The glass balls can effectively participate in the operation of impacting multi-seed seed clusters and assisting the operation of pelletized seeds in forming. The glass balls and the pelletized seeds will not be stratified, and the glass balls will not damage the seed coating layer.

[0062] In actual operation, glass balls of various specifications can be prepared. After determining the length of the pelletized seeds, glass balls with a diameter closest to the length are selected and placed in the rotary kettle.

[0063] Preferably, the operation of adding the adapted glass balls into the rotary kettle in step S2 specifically includes the following steps S301-S302:

[0064] Step S301, determine the number of pelletized irregular seeds, and determine the number of glass balls to be added according to the number and the mixing ratio; the mixing ratio of the glass balls to the irregular seeds is between 1 / 3 and 1 / 2; the mixing ratio is reasonable, and after the glass balls are mixed with the pelletized seeds, the distribution density of the glass balls is high, which can fully take into account the needs of anti-adhesion and auxiliary molding of the pelletized seeds.

[0065] Step S302, according to the number of glass balls to be put in, a corresponding number of glass balls are put into the rotary kettle.

[0066] Preferably, when the rotary speed of the rotary kettle is increased to the second speed and the third speed, the water spraying frequency and the seed coating powder supply frequency are increased according to the current speed. In this way, it can be ensured that as the pelletized seeds become larger, the supply of water and seed coating powder is sufficient. The water spraying frequency and the seed coating powder supply frequency can be set to be proportional to the speed.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for rapidly pelletizing small-sized and odd-shaped seeds, the method comprising: Adding the irregular seeds to be pelletized into a rotary kettle, spraying water and adding seed coating powder into the rotary kettle, so that the seed coating powder adheres to the surface of the irregular seeds to form pelletized seeds; Characterized in that the method specifically comprises the following steps S1-S3: Step S1, rotating the rotary kettle at a first speed until the pelletized seeds are ellipsoidal; Step S2, according to the length of the pelletized seeds, putting suitable glass balls into the rotary kettle, so that the glass balls and the pelletized seeds are mixed, and the rotary kettle is rotated at a second speed; Step S3, when the pelletized seeds are spherical, the rotary kettle is rotated at a third speed, and the water spraying frequency and the seed coating powder feeding frequency are increased until the diameter of the pelletized seeds reaches a preset requirement; The first speed, the second speed and the third speed are in increasing relationship from front to back; The processes of steps S1-S3 are accompanied by the operations of spraying water and adding seed coating powder.

2. The method for rapidly pelletizing small-sized and irregular-shaped seeds according to claim 1, characterized in that: The first rotational speed is 35 r / min; the second rotational speed is 45 r / min; and the third rotational speed is 60 r / min.

3. The method for rapidly pelletizing small-sized and irregular-shaped seeds according to claim 1, characterized in that: After the diameter of the pelletized seeds reaches the preset requirement, the method further comprises: The pelletized seeds were dried with hot air at 40° C. until the surface pressure of the pelletized seeds reached 3N.

4. The method for rapidly pelletizing small-sized and irregular-shaped seeds according to claim 1, characterized in that: The operations of spraying water into the rotary kettle and adding seed coating powder are specifically as follows: First, water is sprayed on the surface of the irregular seeds in the rotary kettle; after the surface of the irregular seeds is moistened, seed coating powder is added into the rotary kettle to form a seed coating layer on the surface of the irregular seeds; Then, water is sprayed into the rotary kettle to moisten the seed coating layer of the irregular seeds, and seed coating powder is added again, and so on.

5. The method for rapidly pelletizing small-sized and irregular-shaped seeds according to claim 1, characterized in that: The step S2 specifically includes the following steps S201-S203: Step S201, sampling the pelletized seeds in the rotary kettle, and determining whether the sampled pelletized seeds have a phenomenon of multiple seeds adhering, and if so, proceeding to step S202; Step S202, according to the length of the pelletized seeds in the rotary kettle at this time, glass balls with a diameter closest to the length of the pelletized seeds are added; Step S203, adjusting the rotation speed of the rotary kettle to a second rotation speed.

6. The method for rapid pelleting of small-sized and irregular-shaped seeds according to claim 1, characterized in that: The operation of adding the adapted glass balls into the rotary kettle in step S2 specifically includes the following steps S301-S302: Step S301, determining the number of pelletized irregular seeds, and determining the number of glass balls to be added according to the number and the mixing ratio; the mixing ratio of the glass balls to the irregular seeds is between 1 / 3 and 1 / 2; Step S302, according to the number of glass balls to be put in, a corresponding number of glass balls are put into the rotary kettle.

7. The method for rapidly pelletizing small-sized and irregular-shaped seeds according to claim 1, characterized in that: When the rotation speed of the rotary kettle is increased to the second rotation speed and the third rotation speed, the water spraying frequency and the seed coating powder adding frequency are increased according to the current rotation speed respectively.

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