Production device and production method of selenium gluconate
By combining continuous flow reaction technology with zoned temperature-controlled reactors, the problems of uneven material mixing and low heat transfer efficiency in traditional selenium gluconate production have been solved, achieving high-efficiency and high-purity selenium gluconate production.
Patent Information
- Application Number
- CN202512018129.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional selenium gluconate production suffers from problems such as uneven material mixing, low mass and heat transfer efficiency, by-product generation, and selenium loss, resulting in slow reaction, low product purity, and low yield.
The continuous flow reaction technology is adopted, and the instantaneous uniform mixing of materials and real-time pH control are achieved by using Venturi reaction tubes and control valves. Combined with zoned temperature-controlled reactors and planetary stirrers, the reaction materials are ensured to be fully mixed and the temperature gradient is controlled in the high-temperature reaction zone, constant-temperature maturation zone and cooling termination zone.
This improved reaction efficiency and product purity, increased yield, and enabled the efficient production of selenium gluconate.
Smart Images
Figure CN121819741A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of selenium gluconate preparation technology, specifically a selenium gluconate production apparatus and production method. Background Technology
[0002] Selenium gluconate, as a highly bioavailable organic selenium supplement, is mainly used to compensate for insufficient dietary selenium intake. Through its antioxidant effects and support for selenoprotein synthesis, it enhances immunity and maintains thyroid and male reproductive health. Clinically, it can be used as an adjunct to reduce the side effects of radiotherapy and chemotherapy. In animal husbandry, it is used to improve animal disease resistance and produce selenium-enriched products.
[0003] Traditional selenium gluconate production uses a batch reactor. This method is prone to generating byproducts due to uneven material mixing, slow reaction due to low mass and heat transfer efficiency, and yield loss due to prolonged heating and contact with metals causing selenium to be reduced to elemental selenium. In addition, insufficient precision in controlling the key process parameter pH is the main reason for the generation of byproducts and selenium precipitation, which further affects product purity, color and overall production efficiency.
[0004] Therefore, it is necessary to provide a production apparatus and method for selenium gluconate to solve the problems mentioned in the background art. Summary of the Invention
[0005] To achieve the above objectives, the present invention provides the following technical solution: a selenium gluconate production apparatus, comprising a base, a reaction vessel horizontally arranged above the base, a motor arranged on one side of the reaction vessel, a belt drive device arranged between the motor and the reaction vessel; and a Venturi reaction tube vertically arranged above the reaction vessel near one end of the belt drive device.
[0006] The Venturi reaction tube is divided into a primary mixing section, a secondary mixing section, and a diffusion section from top to bottom; a third liquid inlet is provided on the outer circumferential side wall of the secondary mixing section, and a control valve is sealed at one end of the third liquid inlet; a hydraulic control device is provided on one side of the base, and a hydraulic pipe is provided between the hydraulic control device and the control valve.
[0007] Furthermore, as a preferred embodiment, the initial mixing section has a double-layer structure, with a first liquid inlet and a second liquid inlet respectively opened along the vertical direction of the inner layer and the outer circumferential sidewall of the outer layer.
[0008] Furthermore, as a preferred embodiment, a plurality of pH sensors are arranged along the circumference of the inner wall of the diffusion section.
[0009] Furthermore, as a preferred embodiment, the control valve includes a valve body, with a fourth inlet and a first outlet respectively opened on both sides of the valve body; a hydraulic cylinder is vertically arranged inside the valve body, and a valve seat fixed to the valve body is arranged at the lower end of the hydraulic cylinder, with a fifth inlet opened along the axial direction of the valve seat; a slidable floating valve core is coaxially arranged inside the hydraulic cylinder; and inlet holes are evenly opened along the outer circumferential sidewall of the hydraulic cylinder.
[0010] Furthermore, preferably, the reactor includes a vessel body, which is divided axially into a high-temperature reaction zone, a constant-temperature curing zone, and a cooling termination zone; heat insulation plates are provided between the high-temperature reaction zone, the constant-temperature curing zone, and the cooling termination zone; a stirring device is coaxially arranged inside the vessel body, and the stirring device is fixed to the output shaft of a belt drive device; heating pipes, heat preservation pipes, and cooling pipes are respectively arranged on the inner walls of the high-temperature reaction zone, the constant-temperature curing zone, and the cooling termination zone; and material plate units are coaxially arranged inside the heating pipes, the heat preservation pipes, and the cooling pipes, located below the stirring device.
[0011] A first feed inlet is provided above the high-temperature reaction zone, and the first feed inlet is connected to the Venturi reaction tube; a first discharge outlet is provided below the cooling termination zone.
[0012] Furthermore, preferably, the stirring device includes planetary stirring modules symmetrically arranged inside the vessel body. Each planetary stirring module includes a sun gear, and a stirring frame is coaxially arranged outside the sun gear. The stirring frame is fixed inside the reactor. A set of planetary gears meshing with both the sun gear and the stirring frame is arranged between the stirring frame and the sun gear. A push screw fixedly connected to the sun gear and a stirring screw fixedly connected to the planetary gears are arranged between the two planetary stirring modules. The sun gear near the motor side is fixed to the output end of the belt drive device. A planetary carrier rotatably arranged outside the output shaft is connected to each planetary gear.
[0013] Furthermore, as a preferred embodiment, the material plate unit includes a material loading platform, the diameter of the arc surface of the material loading platform gradually increases along the axial direction; loading holes are uniformly opened along the outer circumferential surface of the material loading platform; a base is coaxially arranged inside each loading hole, and a compression plate and a compression spring are sequentially sleeved along the axial direction of the base from top to bottom, the two ends of the compression spring being connected to the compression plate and the base respectively; the upper surface of the compression plate is fixed to the material loading platform, and the compression plate can move along the axial direction of the base.
[0014] Furthermore, as a preferred embodiment, the heating pipe, the insulation pipe, and the cooling pipe are all configured with a cavity structure, and the configuration of each pipe is the same, wherein: a first inlet communicating with the cavity is provided on the bottom side of the outer circumferential sidewall of each pipe, which are respectively a first heating port, a first insulation port, and a first cooling port; a second outlet communicating with the cavity is provided on the top side of the outer circumferential sidewall of each pipe, which are respectively a second heating port, a second insulation port, and a second cooling port.
[0015] A method for producing selenium gluconate, comprising the selenium gluconate production apparatus as described in any one of claims 1-8, characterized in that it includes the following steps:
[0016] S1. Gluconic acid solution is introduced into the first inlet and selenite solution is introduced into the second inlet. The gluconic acid solution and selenite solution are mixed in the primary mixing section and then flow into the secondary mixing section. The liquid after primary mixing forms a negative pressure in the secondary mixing section, which accurately and stably draws in the alkaline solution and instantly shears and mixes it. The liquid after secondary mixing flows into the diffusion section.
[0017] S2. The pH sensor detects the pH value of the liquid after secondary mixing. The hydraulic control device controls the flow rate of the control valve in real time according to the change of pH value, thereby adjusting the pH value of the liquid after secondary mixing. The liquid after secondary mixing enters the reactor through the diffusion section.
[0018] S3. High-temperature oil, constant-temperature hot water, and coolant are respectively introduced into the heating pipe, insulation pipe, and cooling pipe to provide a suitable environment for the subsequent reaction. The mixed liquid enters the reactor through the first inlet and, under the action of the stirring device and the material plate unit, passes through the high-temperature reaction zone, the constant-temperature maturation zone, and the cooling termination zone to finally generate selenium gluconate, which is then discharged from the first outlet.
[0019] Compared with the prior art, the beneficial effects of the present invention are:
[0020] This invention employs continuous flow reaction technology, successfully transforming traditional batch reactor reactions into continuous production. By using a Venturi reactor and control valves, instantaneous and uniform mixing of materials and real-time pH control are achieved, thereby significantly improving reaction efficiency, product purity, and yield.
[0021] This invention employs a zoned temperature-controlled reactor, dividing the reactor into three distinct reaction zones: a high-temperature reaction zone, a constant-temperature curing zone, and a cooling termination zone. The constant-temperature curing zone is the main reaction zone, with a length greater than the other reaction zones, ensuring sufficient residence time for the reactants to be completely converted into selenium gluconate. The secondary mixed solution rapidly reaches the optimal reaction temperature in the high-temperature reaction zone, while the constant-temperature curing zone ensures a thorough and stable reaction. The cooling termination zone cools the product to the temperature required for subsequent processing, achieving precise gradient control of the reaction temperature.
[0022] This invention employs a planetary mixing device, which is equipped with a push screw and a planetary screw. The push screw not only plays a mixing role, but more importantly, it continuously pushes the material from the feed end to the discharge end, realizing the "piston flow" propulsion of the material. The mixing screw and the push screw rotate in opposite directions, and each mixing screw can provide the material with a force in the opposite direction to the pushing direction of the push screw, further promoting the full mixing and reaction of the reactants, while extending the residence time of the reactants, so that they are completely converted into selenium gluconate. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0024] Figure 2 This is a schematic diagram of the structure of the Tubrich reaction tube of the present invention.
[0025] Figure 3 This is a schematic diagram of the feeding via the Tubular reactor in the Chinese version of this invention;
[0026] Figure 4 This is a schematic diagram of the control valve in this invention;
[0027] Figure 5 This is a schematic diagram of the structure of the reaction vessel in this invention;
[0028] Figure 6 This is a partially enlarged view of the internal structure of the reactor in this invention;
[0029] Figure 7 This is a schematic diagram of the cross-section of the reactor in this invention;
[0030] Figure 8 This is a schematic diagram of the stirring device in this invention;
[0031] In the diagram: 1. Base; 2. Reactor; 21. Reactor body; 22. High-temperature reaction zone; 23. Constant-temperature curing zone; 24. Cooling termination zone; 25. Heating tube; 251. First heating port; 252. Second heating port; 26. Insulation tube; 261. First insulation port; 262. Second insulation port; 27. Cooling tube; 271. First cooling port; 272. Second cooling port; 28. First feed inlet; 29. First discharge port; 210. Heat insulation plate; 3. Motor; 4. Belt drive device; 41. Output shaft; 5. Venturi reaction tube; 51. Primary mixing section; 52. Secondary mixing section; 53. Diffusion section; 54. First feed inlet 55. Second liquid inlet; 56. Third liquid inlet; 6. Control valve; 61. Valve body; 62. Fourth liquid inlet; 63. First liquid outlet; 64. Hydraulic cylinder; 65. Valve seat; 66. Fifth liquid inlet; 67. Floating valve core; 68. Liquid inlet hole; 7. Hydraulic control device; 8. Hydraulic pipe; 9. Stirring device; 91. Planetary stirring module; 92. Sun gear; 93. Stirring frame; 94. Planetary gear; 95. Push screw; 96. Stirring screw; 97. Planetary carrier; 10. Material plate unit; 101. Material loading platform; 102. Loading port; 103. Base; 104. Compression plate; 105. Compression spring. Detailed Implementation
[0032] Please see Figures 1-8 In this embodiment of the invention, a selenium gluconate production device includes a base 1, a reaction vessel 2 horizontally arranged above the base, a motor 3 arranged on one side of the reaction vessel 2, a belt drive device 4 arranged between the motor 3 and the reaction vessel 2, and a Venturi reaction tube 5 vertically arranged above the reaction vessel 2 near one end of the belt drive device 4.
[0033] The Venturi reaction tube 5 is divided into a primary mixing section 51, a secondary mixing section 52 and a diffusion section 53 from top to bottom. A third liquid inlet 56 is provided on the outer circumferential side wall of the secondary mixing section 52. One end of the third liquid inlet 56 is sealed and connected to a control valve 6. A hydraulic control device 7 is provided on one side of the base 1. A hydraulic pipe 8 is provided between the hydraulic control device 7 and the control valve 6.
[0034] In this embodiment, the primary mixing section 51 has a double-layer structure with an inner and outer layer. A first inlet 54 and a second inlet 55 are respectively opened along the vertical direction of the inner layer and the outer circumferential sidewall of the outer layer. The gluconic acid solution and the selenite solution enter the Venturi reaction tube 5 through the first inlet 54 and the second inlet 55, respectively. After being mixed in the primary mixing section 51, the gluconic acid solution and the selenite solution flow into the secondary mixing section 52. The liquid after the primary mixing forms a negative pressure in the secondary mixing section 52, which accurately and stably draws in the alkaline solution and instantly shears and mixes it. The liquid after the secondary mixing flows into the diffusion section 53.
[0035] In a preferred embodiment, a plurality of pH sensors (not shown in the figure) are arranged along the circumference of the inner wall of the diffusion section 53. After secondary mixing, the liquid flows through the diffusion section 53. The pH sensors detect the pH value of the liquid after secondary mixing. The hydraulic control device 7 controls the flow rate of the control valve 6 in real time according to the change of pH value, thereby adjusting the pH value of the liquid after secondary mixing. The liquid after secondary mixing enters the reactor 2 through the diffusion section 53.
[0036] In this embodiment, the control valve 6 includes a valve body 61, with a fourth inlet 62 and a first outlet 63 on each side of the valve body 61. A hydraulic cylinder 64 is vertically arranged inside the valve body 61, and a valve seat 65 fixed to the valve body 61 is located at the lower end of the hydraulic cylinder 64. A fifth inlet 66 is provided along the axial direction of the valve seat 65. A slidable floating valve core 67 is coaxially arranged inside the hydraulic cylinder 64. Inlet holes 68 are evenly provided along the outer circumferential sidewall of the hydraulic cylinder 64. The alkaline solution enters the hydraulic cylinder 64 through the fourth inlet 62 and the inlet holes 68. Under the negative pressure of the secondary mixing section 52, the alkaline solution enters the Venturi reaction tube 5 through the first outlet 63 and the third inlet 56. The fifth inlet 66 is connected to the hydraulic control device 7 through the hydraulic pipe 8. The hydraulic control device 7 controls the position of the floating valve core 67 by controlling the pressure below it, and then controls the flow rate of the control valve 6 in real time according to the pH value change, thereby adjusting the pH value of the liquid after secondary mixing.
[0037] When the pH sensor detects that the pH value of the secondary mixture is higher than the set threshold, the hydraulic control device 7 will increase the pressure below the floating valve core 67, driving the floating valve core 67 to move upward and partially block the inlet hole 68, thereby reducing the alkaline solution flow rate of the control valve 6 and causing the system pH value to fall back to the set range. Conversely, when the pH value is detected to be lower than the set threshold, the hydraulic control device 7 will reduce the pressure below the floating valve core 67, causing the floating valve core 67 to move downward, increasing the flow area of the inlet hole 68, increasing the alkaline solution flow rate, and thus adjusting the pH value to the normal range.
[0038] In this embodiment, the reactor 2 includes a reactor body 21, which is divided axially into a high-temperature reaction zone 22, a constant-temperature curing zone 23, and a cooling termination zone 24. A heat insulation plate 210 is provided between each of the high-temperature reaction zone 22, the constant-temperature curing zone 23, and the cooling termination zone 24. The heat insulation plate 210 isolates the temperature of adjacent reaction zones while preventing unreacted materials from entering the next reaction zone. A stirring device 9 is coaxially arranged inside the reactor body 21, and the stirring device 9 is fixed to the output shaft 41 of the belt drive device 4. Heating pipes 25, heat-insulating pipes 26, and cooling pipes 27 are respectively provided on the inner walls of the reactor body 21 in the high-temperature reaction zone 22, the constant-temperature curing zone 23, and the cooling termination zone 24. A material plate unit 10 is coaxially arranged inside the heating pipes 25, the heat-insulating pipes 26, and the cooling pipes 27, located below the stirring device 9.
[0039] A first feed inlet 28 is located above the high-temperature reaction zone 22 and is connected to the Venturi reaction tube 5. A first discharge outlet 29 is located below the cooling termination zone 24. The secondary mixed liquid enters the reactor 2 through the first feed inlet 28 and, under the action of the stirring device 9 and the material plate unit 10, passes through the high-temperature reaction zone 22, the constant-temperature curing zone 23, and the cooling termination zone 24 to finally generate selenium gluconate, which is then discharged from the first discharge outlet 29. The constant-temperature curing zone 23 is the main reaction zone, and its length is greater than that of other reaction zones to ensure that the reactants have sufficient residence time to be completely converted into selenium gluconate. The secondary mixed liquid rapidly reaches the optimal reaction temperature in the high-temperature reaction zone 22, the constant-temperature curing zone 23 ensures that the reaction is thorough and stable, and the cooling termination zone 24 cools the product to the subsequent processing temperature, achieving precise gradient control of the reaction temperature.
[0040] In this embodiment, the stirring device 9 includes planetary stirring modules 91 symmetrically arranged inside the reactor body 2. Each planetary stirring module 91 includes a sun gear 92, and a stirring frame 93 is coaxially arranged outside the sun gear 92. The stirring frame 93 is fixed inside the reactor body 2. A set of planetary gears 94, meshing with both the sun gear 92 and the stirring frame 93, is arranged between the stirring frame 93 and the sun gear 92. A push screw 95 fixedly connected to the sun gear 92 and a stirring screw 96 fixedly connected to the planetary gears 94 are arranged between the two planetary stirring modules 91 to push... The screw 95 is designed with a multi-stage propulsion structure, which continuously moves the material from the feed end to the discharge end while stirring, realizing the "piston flow" propulsion of the material; the sun gear 92 near the motor 3 is fixed to the output end 41 of the belt drive device 4; the output shaft 41 is externally rotatably equipped with a planet carrier 97 connected to each planetary gear 94; when the motor 3 is started, the sun gear 92 and the push screw 95 are driven to rotate through the belt drive device 4, and the planetary gears 94 mesh with the sun gear 92, which drives the stirring screw 96 to rotate on its own axis while revolving around the sun gear 92.
[0041] After secondary mixing, the liquid enters the reactor 2 through the first inlet 28. Under the centrifugal force generated by the revolution of the stirring screw 96, it is thrown against the inner wall of the heating tube 25, achieving a third thorough mixing. Subsequently, the liquid further reacts along the inner wall of the heating tube 25 to form selenium gluconate, which finally falls onto the material plate unit 10. During this process, the stirring screw 96 and the push screw 95 rotate in opposite directions. Each stirring screw 96 applies a force to the material in the opposite direction to the push screw 95, which not only enhances the mixing effect but also prolongs its residence time in the reaction zone, facilitating a complete reaction. Simultaneously, the push screw 95 continuously pushes the material from the feed end to the discharge end, achieving continuous material transport and stable reaction.
[0042] In a preferred embodiment, the material plate unit 10 includes a material loading platform 101. The material loading platform 101 has a certain elasticity to ensure that its two sides are always tightly fitted to the inner walls of the heating pipe 25, the insulation pipe 26, and the cooling pipe 27. The cross-sectional diameter of the arc surface on the material loading platform 101 gradually increases along the axial direction. Loading holes 102 are uniformly opened along the outer circumferential surface of the material loading platform 101. A base 103 is coaxially arranged inside each loading hole 102. A compression plate 104 and a compression spring 105 are sequentially sleeved from top to bottom along the axial direction of the base 103. The two ends of the compression spring 105 are respectively connected to the compression plate 104 and the base 103. The upper end face of the compression plate 104 is fixed to the material loading platform 101, and the compression plate 104 can move along the axial direction of the base 103.
[0043] When the secondary mixed liquid reacts along the inner wall of the heating pipe 25 to form selenium gluconate and falls onto the upper arc surface of the material loading platform 101, its gravity forces the material loading platform 101 to compress the compression plate 104 and compression spring 105 below, causing the material loading platform 101 to move radially downward. The two sides of the material loading platform 101 are always tightly attached to the inner wall of the heating pipe 25, providing space for the material to accumulate. The liquid passing through the gap of the stirring device 9 and the unreacted liquid will flow along the upper arc surface of the material loading platform 101 to the constant temperature curing zone 23. The heat insulation plate 210 prevents the unreacted material from entering the constant temperature curing zone 23, allowing it to react fully on the upper arc surface of the material loading platform 101. At the same time, the stirring device 9 continuously pushes the material towards the discharge end. As the material decreases, the compression spring 105 is gradually released, driving the material loading platform 101 to rise radially. Utilizing the design of the axially increasing cross-sectional diameter of its upper arc surface, the remaining material is guided and smoothly enters the subsequent reaction zone.
[0044] In this embodiment, the heating pipe 25, the insulation pipe 26, and the cooling pipe 27 are all configured as hollow structures, and the configuration of each pipe is the same. Specifically, a first inlet communicating with the cavity is provided on the bottom side of the outer circumferential sidewall of each pipe, namely the first heating port 251, the first insulation port 261, and the first cooling port 271; a second outlet communicating with the cavity is provided on the top side of the outer circumferential sidewall of each pipe, namely the second heating port 252, the second insulation port 262, and the second cooling port 272; high-temperature oil, constant-temperature hot water, and coolant are respectively introduced into the heating pipe 25, the insulation pipe 26, and the cooling pipe 27 to provide a suitable environment for the subsequent reaction.
[0045] A method for producing selenium gluconate includes the following steps:
[0046] S1. Gluconic acid solution is introduced into the first inlet 54 and selenite solution is introduced into the second inlet 55. The gluconic acid solution and selenite solution are mixed in the primary mixing section 51 and then flow into the secondary mixing section 52. The liquid after primary mixing forms a negative pressure in the secondary mixing section 52, which accurately and stably draws in the alkaline solution and instantly shears and mixes it. The liquid after secondary mixing flows into the diffusion section 53.
[0047] S2. The pH sensor detects the pH value of the secondary mixed liquid. The hydraulic control device 7 controls the flow rate of the control valve 6 in real time according to the pH value change, thereby adjusting the pH value of the secondary mixed liquid: when the pH sensor detects that the pH value of the secondary mixed liquid is higher than the set threshold, the hydraulic control device 7 will increase the pressure below the floating valve core 67, drive the floating valve core 67 to move upward, partially block the liquid inlet 68, thereby reducing the alkaline solution flow rate of the control valve 6 and causing the system pH value to fall back to the set range; conversely, when the pH value is detected to be lower than the set threshold, the hydraulic control device 7 will reduce the pressure below the floating valve core 67, cause the floating valve core 67 to move downward, increase the flow area of the liquid inlet 68, increase the alkaline solution flow rate, and thus adjust the pH value to the normal range; the secondary mixed liquid enters the reactor 2 through the diffusion section 53.
[0048] S3. High-temperature oil, constant-temperature hot water, and coolant are respectively introduced into the heating pipe 25, the insulation pipe 26, and the cooling pipe 2 to provide a suitable environment for the subsequent reaction. The constant-temperature curing zone 23 is the main reaction zone, and its length is greater than that of other reaction zones to ensure that the reactants have sufficient residence time to be completely converted into selenium gluconate. The mixture after secondary mixing quickly reaches the optimal reaction temperature in the high-temperature reaction zone 22. The constant-temperature curing zone 23 ensures that the reaction is sufficient and stable. The cold zone termination zone 24 cools the product to the subsequent processing temperature, realizing precise gradient control of the reaction temperature.
[0049] After secondary mixing, the liquid enters the reactor 2 through the first inlet 28. Under the centrifugal force generated by the rotation of the stirring screw 96, it is thrown against the inner wall of the heating tube 25, achieving a third thorough mixing. Subsequently, the liquid further reacts along the inner wall of the heating tube 25 to form selenium gluconate. When it falls onto the upper arc surface of the material loading platform 101, its gravity forces the material loading platform 101 to compress the compression plate 104 and compression spring 105 below, causing the material loading platform 101 to move radially downward, providing space for the material to accumulate. At the same time, the stirring device 9 continuously pushes the material towards the discharge end. As the material decreases, the compression spring 105 gradually releases, driving the material loading platform 101 to rise radially. Utilizing the design of the axially increasing cross-sectional diameter of its upper arc surface, the remaining material is guided and smoothly enters the subsequent reaction zone. During this process, the stirring screw 96 and the pushing screw 95 rotate in opposite directions. Each stirring screw 96 applies a force to the material in the opposite direction to the pushing screw 95, which not only enhances the mixing effect of the material but also prolongs its residence time in the reaction zone, which is conducive to the full reaction. The pushing screw 95 continuously pushes the material from the feed end to the discharge end while stirring, realizing continuous material conveying and stable reaction. Under the action of the stirring device 9 and the material plate unit 10, selenium gluconate is finally generated after passing through the high-temperature reaction zone 22, the constant-temperature curing zone 23, and the cooling termination zone 24, and is discharged from the first discharge port 29.
[0050] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A production apparatus for selenium gluconate, characterized in that: It includes a base (1), a reactor (2) is horizontally arranged above the base, a motor (3) is arranged on one side of the reactor (2), and a belt drive device (4) is arranged between the motor (3) and the reactor (2); a Venturi reaction tube (5) is vertically arranged above the reactor (2) near the end of the belt drive device (4). The Venturi reaction tube (5) is divided into a primary mixing section (51), a secondary mixing section (52) and a diffusion section (53) from top to bottom. The outer circumferential sidewall of the secondary mixing section (52) is provided with a third liquid inlet (56), and a control valve (6) is sealed at one end of the third liquid inlet (56). A hydraulic control device (7) is provided on one side of the base (1), and a hydraulic pipe (8) is provided between the hydraulic control device (7) and the control valve (6).
2. The selenium gluconate production apparatus according to claim 1, characterized in that: The initial mixing section (51) has a double-layer structure with a first liquid inlet (54) and a second liquid inlet (55) respectively opened along the vertical direction of the inner layer and the outer circumferential sidewall of the outer layer.
3. The selenium gluconate production apparatus according to claim 1, characterized in that: Several pH sensors are arranged along the circumference of the inner wall of the diffusion section (53).
4. The selenium gluconate production apparatus according to claim 1, characterized in that: The control valve (6) includes a valve body (61), with a fourth inlet (62) and a first outlet (63) respectively on both sides of the valve body (61); a hydraulic cylinder (64) is vertically arranged inside the valve body (61), and a valve seat (65) fixed to the valve body (61) is arranged at the lower end of the hydraulic cylinder (64), with a fifth inlet (66) arranged along the axial direction of the valve seat (65); a slidable floating valve core (67) is coaxially arranged inside the hydraulic cylinder (64); and inlet holes (68) are evenly arranged along the outer circumferential sidewall of the hydraulic cylinder (64).
5. The selenium gluconate production apparatus according to claim 1, characterized in that: The reactor (2) includes a vessel body (21), which is divided into a high-temperature reaction zone (22), a constant-temperature curing zone (23), and a cooling termination zone (24) along the axial direction. A heat insulation plate (210) is provided between the high-temperature reaction zone (22), the constant-temperature curing zone (23), and the cooling termination zone (24). A stirring device (9) is coaxially arranged inside the vessel body (21), and the stirring device (9) is fixed to the output shaft (41) of the belt drive device (4). Heating pipes (25), heat insulation pipes (26), and cooling pipes (27) are respectively provided on the inner walls of the vessel body (21) of the high-temperature reaction zone (22), the constant-temperature curing zone (23), and the cooling termination zone (24). A material plate unit (10) is coaxially arranged inside the heating pipe (25), the heat insulation pipe (26), and the cooling pipe (27) and below the stirring device (9). A first feed inlet (28) is provided above the high-temperature reaction zone (22), and the first feed inlet (28) is connected to the Venturi reaction tube (5); a first discharge outlet (29) is provided below the cooling termination zone (24).
6. The selenium gluconate production apparatus according to claim 5, characterized in that: The stirring device (9) includes planetary stirring modules (91) symmetrically arranged inside the vessel body (21). The planetary stirring module (91) includes a sun gear (92). A stirring frame (93) is coaxially arranged outside the sun gear (92). The stirring frame (93) is fixed inside the reactor (2). A set of planetary gears (94) meshing with both the sun gear (92) and the stirring frame (93) is arranged between the stirring frame (93) and the sun gear (92). A push screw (95) fixedly connected to the sun gear (92) and a stirring screw (96) fixedly connected to the planetary gears (94) are arranged between the two planetary stirring modules (91). The sun gear (92) near the motor (3) is fixed to the output end (41) of the belt drive device (4). A planetary carrier (97) connected to each planetary gear (94) is rotatably arranged outside the output shaft (41).
7. The selenium gluconate production apparatus according to claim 5, characterized in that: The material plate unit (10) includes a material loading platform (101), the cross-sectional diameter of the arc surface on the material loading platform (101) gradually increases along the axial direction; loading holes (102) are uniformly opened along the outer circumferential surface of the material loading platform (101); a base (103) is coaxially arranged inside each loading hole (102), and a compression plate (104) and a compression spring (105) are sequentially sleeved from top to bottom along the axial direction of the base (103), and the two ends of the compression spring (105) are respectively connected to the compression plate (104) and the base (103); the upper end face of the compression plate (104) is fixed to the material loading platform (101), and the compression plate (104) can move along the axial direction of the base (103).
8. The selenium gluconate production apparatus according to claim 5, characterized in that: The heating pipe (25), the insulation pipe (26) and the cooling pipe (27) are all configured as a cavity structure, and the configuration of each pipe is the same. Specifically, the bottom side of the outer circumferential sidewall of each pipe is provided with a first inlet communicating with the cavity, namely the first heating port (251), the first insulation port (261) and the first cooling port (271) in sequence; the top side of the outer circumferential sidewall of each pipe is provided with a second outlet communicating with the cavity, namely the second heating port (252), the second insulation port (262) and the second cooling port (272) in sequence.
9. A method for producing selenium gluconate, comprising using a selenium gluconate production apparatus as described in any one of claims 1-8, characterized in that, It includes the following steps: S1. Gluconic acid solution is introduced into the first inlet (54), and selenite solution is introduced into the second inlet (55). The gluconic acid solution and selenite solution are mixed in the primary mixing section (51) and then flow into the secondary mixing section (52). The liquid after primary mixing forms a negative pressure in the secondary mixing section (52), which accurately and stably draws in the alkaline solution and instantly shears and mixes it. The liquid after secondary mixing flows into the diffusion section (53). S2. The pH sensor detects the pH value of the liquid after secondary mixing. The hydraulic control device (7) controls the flow rate of the control valve (6) in real time according to the change of pH value, thereby adjusting the pH value of the liquid after secondary mixing. The liquid after secondary mixing enters the reactor (2) through the diffusion section (53). S3. High-temperature oil, constant-temperature hot water and coolant are respectively introduced into the heating pipe (25), the insulation pipe (26) and the cooling pipe (2) to provide a suitable environment for the subsequent reaction. The mixed liquid enters the reactor (2) through the first feed port (28). Under the action of the stirring device (9) and the material plate unit (10), it passes through the high-temperature reaction zone (22), the constant-temperature ripening zone (23) and the cooling termination zone (24) to finally generate selenium gluconate, and is sent out from the first discharge port (29).