Screening device for evening primrose seeds

Abstract

The utility model discloses a screening device for evening primrose seeds, and belongs to the technical field of oil screening. Comprising a seed feeding hopper, a compound air-screen cleaner, a temporary storage tank, a magnetic soil separator, a stoning machine, a fine screening machine and a self-circulation winnowing machine which are connected in sequence, evening primrose seed raw materials contain evening primrose seeds and other impurities, the compound air-screen cleaner is connected with a centrifugal fan, and preliminary impurity removal is conducted through combined treatment of the compound air-screen cleaner and the centrifugal fan; secondary impurity removal of the evening primrose seeds is realized by the magnetic soil separator, so that the evening primrose seeds are separated from magnetic impurities; the stone removing machine is used for screening out stones with the specification similar to that of the evening primrose seeds in the materials subjected to secondary impurity removal, and third-time impurity removal is completed; at least two layers of screens with preset apertures are arranged in the fine screening machine, the output end of the fine screening machine is connected with the self-circulation winnowing machine, and products gathered after winnowing treatment of the self-circulation winnowing machine are finally screened evening primrose seeds. The device is thorough in impurity removal, the purity of the evening primrose seeds can reach 99.5% or above, and dust raising in a plant is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil screening technical field, concretely relates to a screening device for evening primrose seeds. BACKGROUND

[0002] The oil and fat industry usually refers to plant raw materials with oil content higher than 10% as oil materials. Evening primrose seeds are one of the oil materials. The existing technology, such as CN118788418A "Flaxseed Hulling Refining Process", mainly considers the treatment in the production process of oil materials, but the existing technology cannot guarantee the pre-treatment of the impurities in the evening primrose seed raw materials, such as sand, gravel, iron impurities, soil, dust, grass stems, grass skin, grass seeds, etc. The sand, gravel and iron impurities should be removed before rolling to prevent damage to the rolling machine. The soil and dust should be removed before leaching because the soil not only makes the mixed oil turbid but also causes the waste of mixed oil. The grass stems, grass skin and grass seeds should also be removed before leaching because these impurities can absorb oil and contain pigments, which can cause the color of the leached oil to deepen and indirectly increase the loss of oil refining. The impurities in the evening primrose seed raw materials can have many adverse effects on oil leaching and refining, so it is urgent to design a screening device for evening primrose seeds to efficiently remove the impurities in the evening primrose seed raw materials. SUMMARY

[0003] According to the above technical problems, a screening device for evening primrose seeds is provided, which can completely remove impurities and make the purity of evening primrose seeds reach more than 99.5%, and the use of this device to screen impurities will not cause dust to rise in the factory building. The technical means adopted by the utility model is as follows:

[0004] A screening device for evening primrose seeds, comprising an input seed hopper, a complex wind screen cleaner, a temporary storage tank, a magnetic soil separator, a stone removal machine, a precision screen and a self-circulating air separator connected in sequence, the input seed hopper is used to input evening primrose seed raw materials, the evening primrose seed raw materials contain evening primrose seeds and other impurities, the complex wind screen cleaner is connected with a centrifugal fan, and the combined treatment of the complex wind screen cleaner and the centrifugal fan is used for preliminary impurity removal; the magnetic soil separator is used to realize secondary impurity removal of the evening primrose seeds to separate the impurities with magnetism; the stone removal machine is used to screen out the stones similar in size to the evening primrose seeds after secondary impurity removal to complete tertiary impurity removal; the precision screen is internally provided with at least two layers of screens with preset aperture, the output end of the precision screen is connected with the self-circulating air separator, the input end of the self-circulating air separator is connected between the two layers of screens, and the product gathered after the air separation treatment of the self-circulating air separator is the final screened evening primrose seeds.

[0005] Furthermore, the bottom of the feed hopper is connected to the top of screw conveyor I, the bottom right side of screw conveyor I is connected to the bottom side of elevator I, the top side of elevator I is connected to the top side of compound air screen cleaner, the middle side of compound air screen cleaner is connected to the bottom side of elevator II, the top side of elevator II is connected to the top side of temporary storage tank, the bottom of temporary storage tank is connected to the top side of screw conveyor II, the bottom side of screw conveyor II is connected to the bottom side of elevator III, the top side of elevator III is connected to the top side of magnetic soil separator, the bottom side of magnetic soil separator is connected to the top side of destoner, the bottom side of destoner is connected to the bottom side of elevator IV, the top side of elevator IV is connected to the top side of fine screening machine, the middle side of fine screening machine is connected to the inlet of self-circulating air separator, the outlet of self-circulating air separator is connected to the bottom side of elevator V, and the top side of elevator V is connected to the top side of finished product tank.

[0006] Furthermore, the bottom of the temporary storage tank is equipped with discharge valve I, and the bottom of the finished product tank is equipped with discharge valve II.

[0007] Furthermore, the top middle position of the compound air screen cleaning machine is connected to the upper part of one side of the cyclone dust collector, the top of the cyclone dust collector is connected to one side of the centrifugal fan, and the top of the centrifugal fan is connected to the bottom of one side of the pulse dust collector.

[0008] Furthermore, the compound air-screen cleaning machine is equipped with an upper screen and a lower screen, with the upper screen having a mesh size of 14-16 and the lower screen having a mesh size of 38-40.

[0009] Furthermore, a valve is provided at the bottom of the cyclone dust collector.

[0010] Furthermore, the fine screening machine is equipped with an upper screen and a lower screen, with the upper screen having a mesh size of 16-18 and the lower screen having a mesh size of 38-40.

[0011] Furthermore, the self-circulating air separator has an internal damper with several adjustable positions to control the airflow of the self-circulating air separator.

[0012] Furthermore, a screw conveyor is provided on the bottom right side inside the self-circulating air separator, and the discharge plug of the screw conveyor is equipped with a pushable sealing plate.

[0013] This invention has the following advantages: The device removes several impurities from the evening primrose seed raw material by removing impurities in stages and steps. Through a compound air sieve cleaning machine and a fine sieve machine with screens of different specifications, evening primrose seeds of similar specifications are uniformly transported to a self-circulating air separator, which removes impurities thoroughly and can make the purity of evening primrose seeds reach more than 99.5%. Moreover, the use of this device to screen impurities will not cause dust to be raised in the factory, thus ensuring the working environment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the evening primrose seed screening device of this utility model.

[0016] In the diagram, 1. Feed hopper; 2. Screw conveyor I; 3. Elevator I; 4. Compound air screen cleaner; 5. Cyclone dust collector; 6. Centrifugal fan; 7. Pulse dust collector; 8. Valve; 9. Elevator II; 10. Temporary storage tank; 11. Discharge valve I; 12. Screw conveyor II; 13. Elevator III; 14. Magnetic soil separator; 15. Destoner; 16. Elevator IV; 17. Fine screening machine; 18. Self-circulating air separator; 19. Elevator V; 20. Finished product tank; 21. Discharge valve II. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0020] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] Figure 1 This utility model protects a screening device for evening primrose seeds, comprising a seed inlet hopper, a double-stage air sieve cleaner, a temporary storage tank, a magnetic soil separator, a destoner, a fine sieve, and a self-circulating air separator connected in sequence. The seed inlet hopper is used to input evening primrose seed raw materials, which contain evening primrose seeds and other impurities. The double-stage air sieve cleaner is connected to a centrifugal fan, and preliminary impurity removal is performed through the combined processing of the double-stage air sieve cleaner and the centrifugal fan. The magnetic soil separator is used to achieve secondary impurity removal of the evening primrose seeds, separating them from magnetic impurities. The destoner is used to remove stones of similar size to the evening primrose seeds from the material after secondary impurity removal, completing a third impurity removal. The fine sieve has at least two layers of screens with preset apertures. The output end of the fine sieve is connected to the self-circulating air separator, and the input end of the self-circulating air separator is connected between the two layers of screens. The product collected after air separation by the self-circulating air separator is the final screened evening primrose seeds.

[0024] Specifically, the device includes a seed feed hopper. The bottom of the seed feed hopper 1 is connected to the top of the screw conveyor I2. The bottom right side of the screw conveyor I2 is connected to the bottom side of one side of the elevator I3. The top side of the other side of the elevator I3 is connected to the top side of one side of the compound air screen cleaner 4. The middle part of the other side of the compound air screen cleaner 4 is connected to the bottom side of one side of the elevator II9. The top side of the other side of the elevator II9 is ​​connected to the top side of one side of the temporary storage tank 10. The bottom of the temporary storage tank 10 is connected to the top side of one side of the screw conveyor II12. The bottom side of the other side of the screw conveyor II12 is connected to one side of the elevator III13. The bottom side of the elevator III 13 is connected to the top side of the magnetic soil separator 14, the bottom side of the magnetic soil separator 14 is connected to the top side of the destoner 15, the bottom side of the destoner 15 is connected to the bottom side of the elevator IV 16, the top side of the elevator IV 16 is connected to the top side of the fine screening machine 17, the middle side of the fine screening machine 17 is connected to the inlet of the self-circulating air separator 18, the outlet of the self-circulating air separator 18 is connected to the bottom side of the elevator V 19, and the top side of the elevator V 19 is connected to the top side of the finished product tank 20.

[0025] The bottom of the temporary storage tank 10 is equipped with a discharge valve I11, and the bottom of the finished product tank 20 is equipped with a discharge valve II21.

[0026] The top middle position of the compound air screen cleaning machine 4 is connected to the upper part of one side of the cyclone dust collector 5, the top of the cyclone dust collector 5 is connected to one side of the centrifugal fan 6, and the top of the centrifugal fan 6 is connected to the bottom of one side of the pulse dust collector 7.

[0027] The compound air-screen cleaning machine 4 is equipped with an upper screen and a lower screen. In this embodiment, the upper screen has a mesh size of 14 and the lower screen has a mesh size of 38.

[0028] The bottom of the cyclone dust collector 5 is equipped with a valve 8.

[0029] The fine screening machine 17 is equipped with an upper screen and a lower screen. In this embodiment, the upper screen has a mesh size of 16 and the lower screen has a mesh size of 38.

[0030] The self-circulating air classifier 18 has an internal damper. In this embodiment, the damper has nine adjustable positions to control the airflow of the self-circulating air classifier 18. A screw conveyor is located on the bottom right side inside the self-circulating air classifier 18, and the discharge plug of the screw conveyor is equipped with a sealing plate.

[0031] The following are specific examples.

[0032] Example 1

[0033] Before screening evening primrose seeds, close valve 8 and discharge valve II 21, and turn on all equipment on the entire screening line. Then, the evening primrose seeds are conveyed into the seed hopper 1. Driven by screw conveyor I 2, the seeds enter elevator I 3. After being lifted to the highest point, the seeds are discharged into the double-layer air-screen cleaning machine 4. Large impurities (large stones, grass stems, large seeds) are screened out from the upper screen, while small impurities (sand, small stones, a small amount of soil, a small amount of turf, small seeds) are screened out from the lower screen. Dust and most of the turf are drawn away by centrifugal fan 6 and stored in cyclone dust collector 5. Centrifugal fan 6 then discharges the turf into pulse dust collector 7. The evening primrose seeds discharged from between the two screens enter elevator II 9. After being lifted to the highest point, the seeds are discharged into temporary storage tank 10. Adjust the discharge valve I11 at the bottom of the temporary storage tank to control the discharge speed of evening primrose seeds. The evening primrose seeds discharged from the temporary storage tank 10 are pushed by the screw conveyor II12 into the elevator III13. After being lifted to the highest point, the seeds are discharged into the magnetic soil separator 14. The seeds are transported from one side to the other on the conveyor belt of the magnetic soil separator (during this process, because most soil contains trace amounts of magnetic minerals such as ferrite, and iron impurities are magnetic, the high-intensity magnetic field formed by the magnetic rollers affects the movement trajectory of the soil and iron impurities in the evening primrose seeds), thus separating the seeds from the soil and iron impurities. Soil and iron impurities fall to the bottom of the magnetic soil separator 14 and are collected. Evening primrose seeds enter the destoner 15. Stones (pebbles similar in size to evening primroses) are discharged from above the destoner screen, while the evening primrose seeds enter the elevator IV 16 from below the destoner screen. After being lifted to the highest point, the evening primrose seeds are discharged into the fine screen 17. (Because the upper screen of the double air screen cleaner 4 has a mesh size of 14, and the upper screen of the fine screen 17 has a mesh size of 16) The upper screen of the fine screen 17 screens out the grass stems and seeds that were not screened out by the double air screen cleaner 4, while the lower screen screens out the small impurities that were missed during the screening process of the double air screen cleaner 4. Evening primrose seeds discharged from between two layers of screens enter the self-circulating air separator 18. After entering through the feed inlet of the self-circulating air separator 18, the seeds fall onto the damper of the self-circulating air separator 18. The air force of the self-circulating air separator 18 is controlled by adjusting the damper (9 adjustment positions). (During the process of the evening primrose seeds falling from the feed inlet onto the damper) The suction of the self-circulating air separator 18 draws grass stems and seeds of different mesh sizes (greater than 38 mesh and less than 16 mesh) into the upper part of the self-circulating air separator 18, where they impact the right side wall and fall onto the screw conveyor at the bottom. Driven by the screw conveyor, they accumulate to a certain amount, enough to open the sealing plate, and are discharged and collected in a woven bag as separated impurities. The evening primrose seeds are discharged from the outlet of the self-circulating air separator 18 into the elevator V19. After being lifted to the highest point, the evening primrose seeds are discharged into the finished product tank 20. The entire process of screening the evening primrose seed raw materials is completed.

[0034] It should be noted that the screw conveyor, elevator, compound air screen cleaner, cyclone dust collector, centrifugal fan, pulse dust collector, magnetic soil separator, destoner, fine screener, self-circulating air separator, and other machines used in this invention can all adopt existing technologies.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such 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 screening device for evening primrose seeds, characterized in that The application relates to a seed input hopper, a compound air screen cleaner, a temporary storage tank, a magnetic soil separator, a stone removing machine, a precision screen machine and a self-circulation air cleaner which are sequentially connected, the seed input hopper is used for inputting evening primrose seed raw materials containing evening primrose seeds and impurities, the compound air screen cleaner is connected with a centrifugal fan, preliminary impurity removal is realized through combined treatment of the compound air screen cleaner and the centrifugal fan, the magnetic soil separator is used for realizing secondary impurity removal of the evening primrose seeds and separating the evening primrose seeds from impurities with magnetism, the stone removing machine is used for removing stones with a size similar to that of the evening primrose seeds from the secondary impurity removal materials, and three times of impurity removal are completed, the precision screen machine is internally provided with at least two layers of screen meshes with preset aperture, an output end of the precision screen machine is connected with the self-circulation air cleaner, an input end of the self-circulation air cleaner is connected between the two layers of screen meshes, and the self-circulation air cleaner is used for realizing final screening of the evening primrose seeds.

2. The screening device for oilseed of the evening primrose of claim 1, wherein The bottom of the seed input hopper (1) is connected with the top of the screw conveyor I (2), the right bottom of the screw conveyor I (2) is connected with the bottom of one side of the elevator I (3), the top of the other side of the elevator I (3) is connected with the top of one side of the compound air screen cleaner (4), the middle of the other side of the compound air screen cleaner (4) is connected with the bottom of one side of the elevator II (9), the top of the other side of the elevator II (9) is connected with the top of one side of the temporary storage tank (10), the bottom of the temporary storage tank (10) is connected with the top of one side of the screw conveyor II (12), the bottom of the other side of the screw conveyor II (12) is connected with the bottom of one side of the elevator III (13), the top of the other side of the elevator III (13) is connected with the top of one side of the magnetic soil separator (14), the bottom of the other side of the magnetic soil separator (14) is connected with the top of one side of the stone removing machine (15), the bottom of the other side of the stone removing machine (15) is connected with the bottom of one side of the elevator IV (16), the top of the other side of the elevator IV (16) is connected with the top of one side of the precision screen machine (17), the middle of the other side of the precision screen machine (17) is connected with the feeding port of the self-circulation air cleaner (18), the discharging port of the self-circulation air cleaner (18) is connected with the bottom of one side of the elevator V (19), and the top of the other side of the elevator V (19) is connected with the top of one side of the finished product tank (20).

3. The screening device for evening primrose seeds according to claim 2, characterized in that, The bottom of the temporary storage tank (10) is provided with a discharging valve I (11), and the bottom of the finished product tank (20) is provided with a discharging valve II (21).

4. The screening device for the evening primrose seeds according to claim 2, characterized in that, The middle position of the top of the compound air screen cleaner (4) is connected with the upper side of one side of the cyclone dust collector (5), the top of the cyclone dust collector (5) is connected with one side of the centrifugal fan (6), and the top of the centrifugal fan (6) is connected with the bottom of one side of the pulse dust collector (7).

5. The screening apparatus for the evening primrose seeds according to claim 2, characterized in that, The compound air screen cleaner (4) is internally provided with an upper layer of screen meshes and a lower layer of screen meshes, the upper layer of screen meshes is 14-16 meshes, and the lower layer of screen meshes is 38-40 meshes.

6. The screening device for the evening primrose seeds according to claim 4, characterized in that, The bottom of the cyclone dust collector (5) is provided with a valve (8).

7. The screening device for oilseed rape seeds according to claim 1 or 5, characterized in that, The precision screen machine (17) is internally provided with an upper layer of screen meshes and a lower layer of screen meshes, the upper layer of screen meshes is 16-18 meshes, and the lower layer of screen meshes is 38-40 meshes.

8. The screening apparatus of claim 1, wherein the screening apparatus is a seed screening apparatus. The self-circulation winnower (18) is internally provided with a damper, and the damper is provided with a plurality of adjusting notches to control the air power of the self-circulation winnower (18).

9. The screening apparatus of claim 1, wherein, A screw conveyor is arranged at the right bottom of the inside of the self-circulation winnower (18), and the discharge plug of the screw conveyor is provided with a pushable sealing plate.

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