Plant selenium extraction equipment and extraction process

Abstract

The invention relates to the technical field of food processing, and specifically to a plant selenium extraction device and an extraction process, comprising an extraction barrel, the top of the extraction barrel is funnel-shaped, a control module is fixedly installed on the side of the extraction barrel, four support legs are fixedly installed on the bottom of the extraction barrel, two support plates are fixedly installed on the top of the extraction barrel, a crushing mechanism is installed on the two support plates through a flipping mechanism, a receiving mouth matched with the crushing mechanism is fixedly installed on the side of the upper end of the extraction barrel, the receiving mouth is connected to the interior of the extraction barrel, a filtering mechanism is installed in the extraction barrel, a liquid outlet at the bottom of the extraction barrel is connected to one end of a liquid outlet pipe, an electromagnetic valve is installed on the liquid outlet pipe, and the electromagnetic valve is electrically connected to the control module. The plant selenium extraction device and the extraction process have the advantages of high extraction efficiency, simplified operation process, easy maintenance and cleaning, etc., and can meet the needs of efficient and pure extraction of plant selenium.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, in particular to plant selenium extraction equipment and an extraction process. Background Art

[0002] Selenium is divided into two types: plant active selenium and inorganic selenium. Inorganic selenium generally refers to sodium selenite and sodium selenate, including yeast selenium and malt selenium with a large amount of inorganic selenium residues, which are obtained from the by-products of metal mines. Inorganic selenium is highly toxic and difficult to absorb, and is not suitable for human and animal use. Plant active selenium is formed by combining with amino acids through biotransformation, generally in the form of selenomethionine. Plant active selenium is a selenium source allowed for use by humans and animals. Crops absorb selenium from selenium-rich soil through nano-root absorption technology. Through the entire growth process of crops, through photosynthesis and the biological transformation of crops themselves, mineral and organic selenium elements are converted into selenomethionine, which is easy for the human body to absorb and metabolize. In order to utilize plant selenium, it is necessary to extract active selenium from plants. At present, when extracting plant selenium from plants, the plants need to be chopped, soaked in water, and separated to dissolve the plant selenium in water. However, the common extraction equipment is mostly split-type design, and multiple manual interventions are required in the process of plant selenium extraction, such as transportation and filtration after crushing, which all need to be done manually. This is not only time-consuming and labor-intensive, but also easy to introduce new pollution, affecting the extraction purity of plant selenium. In addition, when the existing plant selenium extraction equipment filters the crushed plants, whether it is centrifugal filtration or conventional gravity filtration, after filtration, the plant residues will adhere to the bottom and inner wall of the filter cartridge, and cleaning and maintenance are very cumbersome, which brings great inconvenience to users. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention discloses a plant selenium extraction device, which adopts a technical solution comprising an extraction barrel, wherein the top of the extraction barrel is funnel-shaped, a control module is fixedly installed on the side of the extraction barrel, four support legs are fixedly installed on the bottom of the extraction barrel, two support plates are fixedly installed on the top of the extraction barrel, a crushing mechanism is installed on the two support plates through a flipping mechanism, a receiving mouth matched with the crushing mechanism is fixedly installed on the side of the upper end of the extraction barrel, the receiving mouth is connected to the interior of the extraction barrel, a filtering mechanism is installed in the extraction barrel, a liquid outlet at the bottom of the extraction barrel is connected to one end of a liquid outlet pipe, a solenoid valve is installed on the liquid outlet pipe, and the solenoid valve is electrically connected to the control module;

[0004] The filtering mechanism includes a pulley, a filtering motor, a belt, a belt groove and a centrifugal cylinder. The pulley is rotatably mounted on the top of the protruding part of the side of the extraction barrel, and the centrifugal cylinder is rotatably mounted on the supporting surface in the middle of the extraction barrel. A belt groove is provided on the side of the upper end of the centrifugal cylinder, and the belt groove and the pulley are connected by a belt. The filtering motor is fixedly mounted on the bottom of the protruding part of the side of the extraction barrel, and the output shaft of the filtering motor passes through the through hole at the bottom of the side view part of the extraction barrel and is fixedly connected to the middle of the bottom of the pulley. The centrifugal cylinder is composed of a cylinder body and a bottom cover, and a plurality of green water holes are provided on the side of the lower end of the cylinder body, and the filtering motor is electrically connected to the control module.

[0005] As a preferred technical solution of a plant selenium extraction device of the present invention, the flipping mechanism includes a worm wheel, a worm, a fixed plate and a flipping motor. The fixed plates are provided with two, and the two fixed plates are fixedly mounted on the side surfaces of the upper end of one of the support plates. The opposite sides of the two fixed plates are rotatably connected to the two ends of the worm. The worm wheel is fixedly mounted on the crushing mechanism, and the worm wheel is meshed with the worm. The flipping motor is fixedly mounted on the side surfaces of one of the fixed plates, and the output shaft of the flipping motor passes through the through hole on the side surface of the fixed plate and is fixedly connected to one end of the worm. The flipping motor is electrically connected to the control module.

[0006] As a preferred technical solution of a plant selenium extraction device of the present invention, the crushing mechanism includes a crushing barrel, the side surface of the upper end of the crushing barrel is fixedly connected to the end surface of the worm gear, the side surface of the upper end of the crushing barrel is rotatably connected to the side surface of the upper end of another support plate, a conical seat is rotatably installed at the bottom of the crushing barrel, a plurality of crushing blades are fixedly installed on the side of the conical seat, a crushing motor is fixedly installed in the middle of the bottom of the crushing barrel, the output shaft of the crushing motor passes through the through hole at the bottom of the crushing barrel and is fixedly connected to the middle of the bottom of the conical seat, and the crushing motor is electrically connected to the control module.

[0007] As a preferred technical solution for a plant selenium extraction device of the present invention, the middle part of the bottom of the bottom cover is in a downwardly protruding state, a plurality of through holes are provided in the groove on the top of the bottom cover, a plurality of positioning posts are fixedly installed at the edge of the bottom of the bottom cover, a positioning hole matching with the positioning post is provided at the bottom of the cylinder body, a plurality of positioning grooves are provided on the inner side surface of the lower end of the cylinder body, and a rotating block matching with the positioning groove is installed in the groove on the side of the protruding part of the bottom of the bottom cover.

[0008] As a preferred technical solution of a plant selenium extraction device of the present invention, the rotating block includes a rotating ring, a driving tooth and a rotating block, the rotating ring is rotatably mounted in the groove on the side of the protruding part of the bottom of the bottom cover, and multiple groups of driving teeth are arranged on the side of the rotating ring. The rotating block is in the shape of a long strip, and the rotating block is rotatably mounted on the edge of the groove on the side of the protruding part of the bottom of the bottom cover. The rotating block is located on the side of one end of the protruding part of the bottom cover and is provided with a plurality of teeth, and the teeth on the side of the rotating block are meshed with the driving teeth. As a preferred technical solution of a plant selenium extraction device of the present invention, the top of the rotating ring is fixedly connected to the two ends of the U-shaped handle bar, and the top of the bottom cover is provided with an arc groove that matches the handle bar. As a preferred technical solution of a plant selenium extraction device of the present invention, a discharge hopper is fixedly installed at the bottom of the extraction barrel, and a spiral heating wire is fixedly installed in the cavity of the discharge hopper, and the heating wire is connected to the control module.

[0009] The present invention also discloses a process for extracting plant selenium using the plant selenium extraction device, which comprises the following steps:

[0010] Step 1: placing the plant material to be extracted into the crushing mechanism of the plant selenium extraction device according to any one of claims 1 to 4, starting the crushing motor through the control module, driving the conical seat and the crushing blade thereon to rotate, and crushing the plant material;

[0011] Step 2: Start the flip motor through the control module to drive the worm and the worm gear, so that after the crushing barrel is flipped, the crushed plant material falls into the filtering mechanism in the extraction barrel through the receiving mouth, specifically into the centrifugal barrel; at this time, start the filtering motor through the control module to drive the pulley and the belt to rotate, and then drive the centrifugal barrel to rotate, centrifugally filter the plant material, and extract selenium;

[0012] Step 3: During the extraction process, the spiral heating wire in the discharge hopper at the bottom of the extraction barrel is heated under the control of the control module to help the selenium element to dissolve or separate better;

[0013] Step 4: After the plant selenium extraction is completed, the solenoid valve is opened through the control module to allow the extract to flow out through the liquid outlet pipe for subsequent collection and processing;

[0014] Step 5: After the extraction is completed, the handle can be used to drive the rotating block to rotate, and the rotating block can be separated from the positioning groove, so that the bottom cover can be easily taken out and disassembled, and the centrifuge cylinder can be cleaned and maintained.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention pulverizes the plant material through a pulverizing mechanism, thereby increasing the contact area between the plant material and the extraction solvent, thereby improving the extraction efficiency of selenium. At the same time, the filtering mechanism adopts a centrifugal filtration method, which can quickly and effectively separate the selenium from the plant material, further improving the extraction efficiency.

[0017] 2. The plant selenium extraction equipment of the present invention integrates the functions of crushing, filtering, heating and draining, realizes automatic control, simplifies the operation process, and can also prevent the pollution introduced by human participation, thereby improving the purity of plant selenium extraction.

[0018] 3. The detachable bottom cover can be easily taken out and disassembled, which is convenient for cleaning plant residues and cleaning and maintenance of the centrifuge cylinder, ensuring the long-term stable operation of the equipment and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the flipping mechanism of the present invention;

[0021] Figure 3 Schematic diagram of the crushing mechanism structure of the present invention

[0022] Figure 4 This is a schematic diagram of the extraction barrel structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the filtering mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the centrifuge cylinder of the present invention;

[0025] Figure 7 It is a schematic diagram of the cylinder body and bottom cover structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the rotating clamp block of the present invention;

[0027] Fig. 9 This is a schematic diagram of the internal structure of the bottom cover of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the rotating block of the present invention; Fig.11 This is a schematic diagram of the internal structure of the extraction barrel of the present invention; Fig.12 The figure is a process flow chart of plant selenium extraction according to the present invention.

[0029] In the figure: 1 extraction barrel, 2 control module, 3 support leg, 4 support plate, 5 flip mechanism, 51 worm gear, 52 worm, 53 fixed plate, 54 flip motor, 6 crushing mechanism, 61 crushing barrel, 62 crushing blade, 63 crushing motor, 64 conical seat, 7 filtering mechanism, 71 pulley, 72 filtering motor, 73 belt, 74 belt groove, 75 centrifugal cylinder, 751 cylinder body, 752 bottom cover, 753 water filter hole, 754 positioning hole, 755 positioning column, 756 positioning groove, 757 rotating block, 7571 rotating ring, 7572 driving tooth, 7573 rotating block, 8 receiving nozzle, 9 liquid outlet pipe, 10 solenoid valve, 11 handle rod, 12 heating wire, 13 discharge hopper. DETAILED DESCRIPTION

[0030] Example 1

[0031] like Figures 1 to 11 As shown, the present invention discloses a plant selenium extraction device, which adopts the technical scheme of comprising an extraction barrel 1, the top of the extraction barrel 1 is funnel-shaped, a control module 2 is fixedly installed on the side of the extraction barrel 1, four support legs 3 are fixedly installed on the bottom of the extraction barrel 1, two support plates 4 are fixedly installed on the top of the extraction barrel 1, a discharge hopper 13 is fixedly installed on the bottom of the extraction barrel 1, a spiral heating wire 12 is fixedly installed in the cavity of the discharge hopper 13, the heating wire 12 is connected to the control module 2, a crushing mechanism 6 is installed on the two support plates 4 through a flipping mechanism 5, the flipping mechanism 5 comprises a worm wheel 51, a worm 52, a fixed plate 53 and a flipping motor 54, two fixed plates 53 are provided, the two fixed plates 53 are fixedly installed on the side of the upper end of one of the support plates 4, the opposite sides of the two fixed plates 53 are rotatably connected with the two ends of the worm 52, the worm wheel 51 is fixedly installed on the crushing mechanism 6, the worm wheel 51 is meshed with the worm 52, the flipping motor 54 is fixedly installed on the side of one of the fixed plates 53, and the output shaft of the flipping motor 54 The through hole passing through the side of the fixing plate 53 is fixedly connected to one end of the worm 52, the flip motor 54 is electrically connected to the control module 2, the crushing mechanism 6 includes a crushing barrel 61, the side surface of the upper end of the crushing barrel 61 is fixedly connected to the end surface of the worm wheel 51, the side surface of the upper end of the crushing barrel 61 is rotatably connected to the side surface of the upper end of another support plate 4, the bottom of the crushing barrel 61 is rotatably installed with a conical seat 64, a plurality of crushing blades 62 are fixedly installed on the side of the conical seat 64, and a crushing electric The output shaft of the crushing motor 63 passes through the through hole at the bottom of the crushing barrel 61 and is fixedly connected to the middle of the bottom of the conical seat 64. The crushing motor 63 is electrically connected to the control module 2. A receiving nozzle 8 matching with the crushing mechanism 6 is fixedly installed on the side of the upper end of the extraction barrel 1. The receiving nozzle 8 is connected to the interior of the extraction barrel 1. A filtering mechanism 7 is installed in the extraction barrel 1. The liquid outlet at the bottom of the extraction barrel 1 is connected to one end of the liquid outlet pipe 9. The liquid outlet pipe 9 is installed with an electromagnetic valve 10, and the electromagnetic valve 10 is electrically connected to the control module 2.

[0032] The filtering mechanism 7 includes a pulley 71, a filtering motor 72, a belt 73, a belt groove 74 and a centrifugal drum 75. The pulley 71 is rotatably mounted on the top of the protruding part of the side of the extraction barrel 1. The centrifugal drum 75 is rotatably mounted on the supporting surface in the middle of the extraction barrel 1. A belt groove 74 is provided on the side of the upper end of the centrifugal drum 75. The belt groove 74 and the pulley 71 are connected by a belt 73. The filtering motor 72 is fixedly mounted on the bottom of the protruding part of the side of the extraction barrel 1. The output shaft of the filtering motor 72 passes through the through hole at the bottom of the side view part of the extraction barrel 1 and is fixedly connected to the middle of the bottom of the pulley 71. The centrifugal drum 75 is composed of a barrel body 751 and a bottom cover 752. A plurality of green water holes 753 are provided on the side of the lower end of the barrel body 751. The filtering motor 72 is electrically connected to the control module 2.

[0033] The middle part of the bottom of the bottom cover 752 is in a downwardly protruding state, a plurality of through holes are provided in the groove at the top of the bottom cover 752, a plurality of positioning posts 755 are fixedly installed at the edge of the bottom of the bottom cover 752, a positioning hole 754 matching with the positioning post 755 is provided at the bottom of the cylinder 751, a plurality of positioning grooves 756 are provided on the inner side surface of the lower end of the cylinder 751, a rotating block 757 matching with the positioning groove 756 is installed in the groove on the side surface of the protruding part of the bottom of the bottom cover 752, the rotating block 757 includes a rotating ring 7571, a driving tooth 7572 and a rotating block 7573, the rotating ring 7571 It is rotatably installed in the groove on the side of the protruding part at the bottom of the bottom cover 752, and multiple groups of driving teeth 7572 are arranged on the side of the rotating ring 7571. The rotating block 7573 is long and strip-shaped. The rotating block 7573 is rotatably installed on the edge of the groove on the side of the protruding part at the bottom of the bottom cover 752. A plurality of teeth are arranged on the side of one end of the rotating block 7573 located inside the protruding part on the bottom cover 752. The teeth on the side of the rotating block 7573 are engaged with the driving teeth 7572. The top of the rotating ring 7571 is fixedly connected to the two ends of the U-shaped handle rod 11, and the top of the bottom cover 752 is provided with an arc groove matching the handle rod 11.

[0034] When in use, an external power source is connected, and selenium-rich plants, such as Cardamine violaceum and Astragalus membranaceus, are placed in the crushing barrel 61. The crushing motor 63 is controlled by the control module 2 to work, so that the output shaft of the crushing motor 63 drives the conical seat 64 to rotate, and the conical seat 64 drives the crushing blade 62 thereon to rotate, so that the high-speed rotating crushing blade 62 cuts the selenium-rich plants into pieces, and the flip motor 54 is controlled by the control module 2 to work, so that the output shaft of the flip motor 54 drives the worm 52 to rotate, so that the worm 52 drives the worm wheel 51 and the powder The crushing barrel 61 rotates to flip the crushing barrel 61, so that the crushed selenium-rich plants in the crushing barrel 61 slide into the receiving mouth 8. At the same time, the crushing barrel 61 is rinsed with solvent water with a weight equivalent to four times that of the selenium-rich plants, so that the crushed residues and solvent water flow into the centrifugal cylinder 75 through the receiving mouth 8 and the bucket-shaped structure inside the extraction barrel 1. Most of the water flows into the bottom of the extraction barrel 1 from the through holes and the water filter holes 753 on the bottom cover 752. The filter motor 72 is controlled by the control module 2 to work, so that the output shaft of the filter motor 72 The pulley 71 is driven to rotate, so that the pulley 71 drives the belt 73 to rotate, and the belt 73 drives the centrifugal drum 75 to rotate, so that the water and juice in the crushed plants in the centrifugal drum 75 are thrown out into the extraction barrel 1 by the centrifugal force, and flow into the solvent water in the extraction barrel 1. The control module 2 controls the electric heating wire 12 to work, so that the discharge hopper 13 heats the solvent water, so that the selenium element in the plant can be quickly dissolved in the water. After dissolution, the solenoid valve 10 is controlled by the control module 2 to discharge the extracted selenium-containing water to the outside. Yes, after the extraction is completed, the handle bar 11 can be held and pushed to rotate, so that the handle bar 11 drives the rotating ring 7571 to rotate, and the driving teeth 7572 on the rotating ring 7571 drive the rotating block 7573 to rotate, so that the outer end of the rotating block 7573 rotates out of the positioning groove 756. At this time, the bottom cover 752 is separated from the cylinder body 751, and the handle bar 11 and the bottom cover 752 are lifted up, and the bottom cover 752 is taken out of the cylinder body 751. At this time, the remaining plant residues in the bottom cover 752 can be cleaned.

[0035] Example 2

[0036] like Fig.12 As shown, the present invention also discloses a process for extracting plant selenium using the plant selenium extraction device, comprising the following steps:

[0037] Step 1: Put the plant material to be extracted into the crushing mechanism 6 of the plant selenium extraction device according to any one of claims 1 to 7, start the crushing motor 63 through the control module 2, drive the conical seat 64 and the crushing blade 62 thereon to rotate, and crush the plant material;

[0038] Step 2: Start the flip motor 54 through the control module 2 to drive the worm 52 and the worm wheel, so that the crushing barrel 61 is flipped, and the crushed plant material falls into the filtering mechanism 7 in the extraction barrel 1 through the receiving mouth 8, specifically into the centrifugal barrel 75; at this time, start the filtering motor 72 through the control module 2 to drive the pulley 71 and the belt 73 to rotate, and then drive the centrifugal barrel 75 to rotate, centrifugally filter the plant material, and extract selenium;

[0039] Step 3: During the extraction process, the spiral heating wire 12 in the discharge hopper 13 provided at the bottom of the extraction barrel 1 is heated under the control of the control module 2 to help the selenium element to be better dissolved or separated;

[0040] Step 4: After the plant selenium extraction is completed, the solenoid valve 10 is opened through the control module 2 to allow the extract to flow out through the liquid outlet pipe 9 for subsequent collection and processing;

[0041] Step 5: After the extraction is completed, the handle bar 11 can be used to drive the rotating block 757 to rotate, and the rotating block 757 can be separated from the positioning groove 756, so that the bottom cover 752 can be easily taken out and disassembled, and the centrifugal cylinder 75 can be cleaned and maintained.

[0042] The circuit connection involved in the present invention is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0043] Components not described in detail herein are prior art.

[0044] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the protection scope of the present invention.

Claims

1. A plant selenium extraction device, characterized in that: The invention comprises an extraction barrel (1), the top of the extraction barrel (1) is funnel-shaped, a control module (2) is fixedly mounted on the side of the extraction barrel (1), four support legs (3) are fixedly mounted on the bottom of the extraction barrel (1), two support plates (4) are fixedly mounted on the top of the extraction barrel (1), a crushing mechanism (6) is mounted on the two support plates (4) via a flipping mechanism (5), a receiving mouth (8) matched with the crushing mechanism (6) is fixedly mounted on the side of the upper end of the extraction barrel (1), the receiving mouth (8) is connected to the interior of the extraction barrel (1), a filtering mechanism (7) is mounted in the extraction barrel (1), a liquid outlet at the bottom of the extraction barrel (1) is connected to one end of a liquid outlet pipe (9), a solenoid valve (10) is mounted on the liquid outlet pipe (9), and the solenoid valve (10) is electrically connected to the control module (2); The filtering mechanism (7) comprises a belt pulley (71), a filtering motor (72), a belt (73), a belt groove (74) and a centrifugal drum (75); the belt pulley (71) is rotatably mounted on the top of a protruding portion of a side surface of the extraction barrel (1); the centrifugal drum (75) is rotatably mounted on a supporting surface in the middle of the extraction barrel (1); a belt groove (74) is provided on the side surface of the upper end of the centrifugal drum (75); the belt groove (74) and the belt pulley (71) are connected via a belt (73). The filtering motor (72) is fixedly mounted on the bottom of the protruding part of the side of the extraction barrel (1), and the output shaft of the filtering motor (72) passes through the through hole at the bottom of the side part of the extraction barrel (1) and is fixedly connected to the middle part of the bottom of the pulley (71). The centrifugal cylinder (75) is composed of a cylinder body (751) and a bottom cover (752). A plurality of green water holes (753) are provided on the side of the lower end of the cylinder body (751). The filtering motor (72) is electrically connected to the control module (2).

2. A plant selenium extraction device according to claim 1, characterized in that: The flipping mechanism (5) comprises a worm wheel (51), a worm (52), a fixed plate (53) and a flipping motor (54). Two fixed plates (53) are provided. The two fixed plates (53) are fixedly mounted on the side surface of the upper end of one of the support plates (4). The opposite side surfaces of the two fixed plates (53) are rotatably connected to the two ends of the worm (52). The worm wheel (51) is fixedly mounted on the crushing mechanism (6). The worm wheel (51) is meshed with the worm (52). The flipping motor (54) is fixedly mounted on the side surface of one of the fixed plates (53). The output shaft of the flipping motor (54) passes through a through hole on the side surface of the fixed plate (53) and is fixedly connected to one end of the worm (52). The flipping motor (54) is electrically connected to the control module (2).

3. A plant selenium extraction device according to claim 2, characterized in that: The crushing mechanism (6) comprises a crushing barrel (61), the side surface of the upper end of the crushing barrel (61) is fixedly connected to the end surface of the worm wheel (51), the side surface of the upper end of the crushing barrel (61) is rotatably connected to the side surface of the upper end of another support plate (4), a conical seat (64) is rotatably mounted on the bottom of the crushing barrel (61), a plurality of crushing blades (62) are fixedly mounted on the side surface of the conical seat (64), a crushing motor (63) is fixedly mounted in the middle of the bottom of the crushing barrel (61), an output shaft of the crushing motor (63) passes through a through hole in the bottom of the crushing barrel (61) and is fixedly connected to the middle of the bottom of the conical seat (64), and the crushing motor (63) is electrically connected to the control module (2).

4. A plant selenium extraction device according to claim 1, characterized in that: The middle part of the bottom of the bottom cover (752) is in a downwardly protruding state, a plurality of through holes are provided in the groove at the top of the bottom cover (752), a plurality of positioning posts (755) are fixedly installed at the edge of the bottom of the bottom cover (752), a positioning hole (754) matching with the positioning post (755) is provided at the bottom of the cylinder (751), a plurality of positioning grooves (756) are provided on the inner side surface of the lower end of the cylinder (751), and a rotating block (757) matching with the positioning groove (756) is installed in the groove on the side surface of the protruding part of the bottom of the bottom cover (752).

5. A plant selenium extraction device according to claim 4, characterized in that: The rotating block (757) comprises a rotating ring (7571), driving teeth (7572) and a rotating block (7573); the rotating ring (7571) is rotatably mounted in a groove on the side of the protruding portion at the bottom of the bottom cover (752); a plurality of groups of driving teeth (7572) are arranged on the side of the rotating ring (7571); the rotating block (7573) is in the shape of an elongated strip; the rotating block (7573) is rotatably mounted on the edge of the groove on the side of the protruding portion at the bottom of the bottom cover (752); a plurality of teeth are arranged on the side of one end of the rotating block (7573) located inside the protruding portion on the bottom cover (752); the teeth on the side of the rotating block (7573) mesh with the driving teeth (7572).

6. A plant selenium extraction device according to claim 5, characterized in that: The top of the rotating ring (7571) is fixedly connected to the two ends of the U-shaped handle bar (11), and the top of the bottom cover (752) is provided with an arc groove matching the handle bar (11).

7. A plant selenium extraction device according to claim 1, characterized in that: A discharge hopper (13) is fixedly installed at the bottom of the extraction barrel (1), and a spiral heating wire (12) is fixedly installed in the cavity of the discharge hopper (13), and the heating wire (12) is connected to the control module (2).

8. The process for extracting plant selenium according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: placing the plant material to be extracted into the pulverizing mechanism (6) of the plant selenium extraction device according to any one of claims 1 to 7, starting the pulverizing motor (63) through the control module (2), driving the conical seat (64) and the pulverizing blade (62) thereon to rotate, and pulverizing the plant material; Step 2: The control module (2) starts the turning motor (54) to drive the worm (52) and the worm wheel, so that the crushing barrel (61) turns over, and the crushed plant material falls into the filtering mechanism (7) in the extraction barrel (1), specifically into the centrifugal barrel (75) through the receiving mouth (8); at this time, the control module (2) starts the filtering motor (72), drives the pulley (71) and the belt (73) to rotate, and then drives the centrifugal barrel (75) to rotate, so as to centrifugally filter the plant material and extract selenium; Step 3: During the extraction process, the spiral heating wire (12) in the discharge hopper (13) arranged at the bottom of the extraction barrel (1) is heated under the control of the control module (2) to help the selenium element dissolve better; Step 4: After the plant selenium extraction is completed, the solenoid valve (10) is opened through the control module (2) to allow the extract to flow out through the liquid outlet pipe (9) for subsequent collection and processing; Step 5: After the extraction is completed, the handle bar (11) can be used to drive the rotating block (757) to rotate, and the rotating block (757) can be separated from the positioning groove (756), so that the bottom cover (752) can be easily taken out and disassembled, and the centrifuge cylinder (75) can be cleaned and maintained.

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