Granule delivery device for a vitamin b12 food additive

Abstract

The application provides a kind of granule conveying device for vitamin B12 food additive, relating to food additive processing technical field, including raw material tank, discharge pipeline is vertically connected to the lower end of raw material tank, discharge pipeline includes discharge section, anti-sticking section and feeding section from top to bottom, the pipe diameter of discharge section and the pipe diameter of feeding section are all greater than the pipe diameter of anti-sticking section;Cooling sleeve is sleeved on the outer periphery of discharge pipeline and covers anti-sticking section, cooling space is formed between cooling sleeve and discharge pipeline, the gas inlet and gas outlet for guiding cooling gas into and out of cooling space are arranged on the peripheral wall of cooling sleeve, to cool the raw materials flowing through anti-sticking section, avoid the oxidation and deterioration problem caused by long-term residence of raw materials adhering to pipe wall in high temperature environment in traditional way.

Description

Technical Field

[0001] This invention belongs to the field of food additive processing technology, specifically, it relates to a granule conveying device for vitamin B12 food additive. Background Technology

[0002] Vitamin B12, an essential water-soluble vitamin, cannot be synthesized by the human body and must be obtained through exogenous intake. As a food additive, it enhances the nutritional value of food and compensates for nutritional deficiencies. The raw material for producing vitamin B12 food additives is soil-like mycelium. This raw material is characterized by its moisture content, dust generation, and tendency to clump. On the one hand, the high moisture content of the raw material makes it prone to adhesion and clumping. If open conveying or mechanical pushing is used, clumping and blockage can easily occur, hindering smooth transport. On the other hand, soil-like raw materials easily generate dust. If non-enclosed conveying is used, dust can leak into the factory environment, causing raw material loss and potentially contaminating other production lines. Furthermore, external dust and impurities can easily enter the raw material, compromising its purity and failing to meet the hygiene and compliance requirements for food additives.

[0003] Therefore, negative pressure adsorption and transportation are usually carried out through closed pipelines to isolate the raw materials from external contact and achieve closed transfer of raw materials. In the traditional negative pressure adsorption process, the initial temperature of the mycelial raw material produced from the granulation and fermentation process can reach about 400℃. At this time, the moisture inside the mycelium is in a softened state, and the texture will change from the original dry soil to soft mud and sticky. Traditional negative pressure adsorption does not pre-treat the high-temperature mycelium and directly sucks the newly produced soft mud-like mycelium into the negative pressure pipeline.

[0004] However, during negative pressure transport, if the air velocity within the pipeline is insufficient, the soft, mud-like mycelium will settle to the bottom of the pipeline due to gravity. Simultaneously, the high temperature causes the mycelium to adhere strongly to the pipe wall. As transport continues, the adhesive material on the pipe wall accumulates thicker and thicker, eventually leading to pipe blockage. Secondly, the newly produced mycelium is at a higher temperature, resulting in heat exchange with the inner wall of the pipeline. The mycelium at high temperatures is more adhesive and difficult to remove from the pipe wall by airflow. Compared to raw materials at room temperature, the adhesive layer forms faster and is more tightly bound, increasing the workload and frequency of pipeline cleaning. Furthermore, dismantling the pipe for cleaning may cause raw material loss and hygiene contamination risks. Thirdly, the mycelium adhering to the pipe wall and remaining there for extended periods is prone to localized oxidation and deterioration due to the high temperature environment. If the deteriorated adhesive material mixes with subsequent raw materials, it will directly affect the purity of vitamin B12 extraction and the quality stability of the food additive, failing to meet the quality compliance requirements for food additives. Summary of the Invention

[0005] The purpose of this invention is to provide a granule conveying device for vitamin B12 food additives, which solves the technical problem in related technologies that soft, mud-like mycelia easily adhere to the pipe wall.

[0006] At least one embodiment of the present invention provides a granule conveying device for vitamin B12 food additives, comprising: a raw material tank; The discharge pipe is vertically connected to the lower end of the raw material tank. From top to bottom, the discharge pipe includes a discharge section, an anti-sticking section, and a feeding section. The pipe diameter of the discharge section and the feeding section are both larger than the pipe diameter of the anti-sticking section. A cooling sleeve is fitted around the outer periphery of the discharge pipe and covers the anti-sticking section. A cooling space is formed between the cooling sleeve and the discharge pipe. The peripheral wall of the cooling sleeve has an air inlet and an air outlet for introducing and discharging cooling gas into and out of the cooling space to cool the raw material flowing through the anti-sticking section.

[0007] According to an exemplary embodiment of this disclosure, the anti-sticking section includes a first shrinkage section, which is eccentrically arranged relative to the discharge section.

[0008] According to an exemplary embodiment of this disclosure, the anti-sticking section further includes a first transition section located between the first shrinkage section and the discharge section. The inner diameter of the first transition section gradually shrinks from top to bottom, which can support part of the material and guide it to the first shrinkage section. The inner wall of the first contraction section is tangent to the inner wall of the discharge section at a single point in the circumferential direction.

[0009] According to an exemplary embodiment of this disclosure, the anti-sticking section further includes a second contraction section located below the first contraction section and a second transition section connecting the first contraction section and the second contraction section; The second shrinkage section is eccentrically arranged relative to the feeding section, and the axis of the second shrinkage section is parallel to and spaced apart from the axis of the first shrinkage section. The second transition section can receive the material below the first shrinkage section and guide it to the second shrinkage section.

[0010] According to an exemplary embodiment of this disclosure, the inner wall of the second shrinking section is tangent to the inner wall of the feeding section at a single point in the circumferential direction.

[0011] According to an exemplary embodiment of this disclosure, the air inlet is located on the lower side wall of the cooling sleeve, and the air outlet is located at the upper end of the cooling sleeve, so that the cooling air flows from bottom to top.

[0012] According to an exemplary embodiment of this disclosure, the outer sidewalls of the first transition section and the second transition section that receive the material can be subjected to the impact of cooling air.

[0013] According to an exemplary embodiment of this disclosure, two baffles are provided inside the cooling sleeve, and a ventilation opening is formed between the baffles and the inner wall of the cooling sleeve. The first contraction section and the second contraction section are respectively located inside the two ventilation openings. The baffle can block and guide the cooling air from bottom to top through the two ventilation openings, and cool the material inside the anti-stick section tube through the anti-stick section tube wall.

[0014] According to an exemplary embodiment of this disclosure, a valve is also included, which is located in the discharge section near the raw material tank and can be opened and closed to block or release material.

[0015] According to an exemplary embodiment of this disclosure, the cooling space extends above the valve, enabling the material falling onto the valve to be cooled by the peripheral pipe wall of the discharge section located above the valve.

[0016] This invention provides a granule conveying device for vitamin B12 food additives. By continuously introducing cooling gas into a cooling sleeve, heat is transferred into the pipe through the wall of the discharge pipe. Due to the small diameter and relatively fixed wall thickness of the anti-sticking section, and the fact that the cooling sleeve completely covers this section, the heat transfer efficiency is high. The surface temperature of the raw material flowing through this section is rapidly reduced. Since the viscosity of the raw material is positively correlated with temperature, its viscosity decreases as the temperature drops, significantly weakening the adhesion between the raw material and the pipe wall. Even if the raw material comes into contact with the pipe wall due to gravity, it is more likely to move downwards under the airflow and is less likely to form a stable adhesion layer. This avoids the oxidation and deterioration problems caused by the raw material adhering to the pipe wall and remaining in a high-temperature environment for a long time in traditional methods. This ensures the purity and freshness of the raw material entering the subsequent extraction process, thereby guaranteeing the extraction purity of vitamin B12 and the quality stability of the final food additive. Simultaneously, because the occurrence of pipe blockage due to wall adhesion is suppressed, the continuous conveying cycle is extended, reducing the risk of raw material loss, production interruption, and hygiene contamination caused by pipe disassembly and cleaning. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a granule conveying device for vitamin B12 food additive provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A cross-sectional view of the discharge pipe and cooling sleeve from a first-angle perspective; Figure 3 This is an embodiment of the present invention. Figure 1 A cross-sectional view of the discharge pipe and cooling sleeve from a second perspective.

[0019] In the diagram: 100, raw material tank; 200, discharge pipe; 210, discharge section; 220, anti-stick section; 221, first contraction section; 222, first transition section; 223, second contraction section; 224, second transition section; 230, feeding section; 300, cooling sleeve; 310, cooling space; 320, air inlet; 330, air outlet; 400, baffle plate; 500, ventilation opening; 600, valve. Detailed Implementation

[0020] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure. For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this disclosure will be explained and described below.

[0021] It should be understood that the described embodiments are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0022] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should be understood that the term "and / or" used in this article is merely a way of describing the logical relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Depending on the context, the word "if" as used here can be interpreted as "when" or "when" or "in response to determination" or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination" or "in response to determination" or "when detection (of the stated condition or event)" or "in response to detection (of the stated condition or event)."

[0025] It should be understood that the terms "first," "second," etc., used in this disclosure are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0026] In the description of this disclosure, the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to 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 should not be construed as a limitation of this disclosure.

[0027] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0028] In the production process of vitamin B12 food additives, the raw material is soil-like mycelium. When this mycelium is first produced from the granulation and fermentation process, it is at a high temperature and appears as a moist and sticky soft mud. It is characterized by being prone to dust and clumping. In the traditional negative pressure conveying method, the high-temperature soft mud-like mycelium directly enters the conveying pipeline. Due to gravity settling and viscosity, it is easy to form an adhesion layer on the pipe wall and gradually thicken, leading to pipe blockage. At the same time, the retained high-temperature mycelium is prone to oxidation and deterioration, which can mix into subsequent raw materials, affecting the extraction purity and product quality.

[0029] In response to the above problems, such as Figures 1-3 As shown in the example, this embodiment illustrates a granule conveying device for vitamin B12 food additives according to an embodiment of the present invention. It includes a raw material tank 100 for temporarily storing high-temperature mycelial raw materials, and a discharge pipe 200 vertically connected to the lower end of the raw material tank 100. The discharge pipe 200 consists of a discharge section 210, an anti-sticking section 220, and a feeding section 230 from top to bottom. The diameters of the discharge section 210 and the feeding section 230 are both larger than the diameter of the anti-sticking section 220. The discharge section 210, the anti-sticking section 220, and the feeding section 230 are coaxially arranged and connected end-to-end. The three sections can be integrally formed into a single pipe structure, or they can be segmented and then welded together. The flange connection is used for fixed connection. A cooling sleeve 300 is sleeved on the outer periphery of the discharge pipe 200. The cooling sleeve 300 covers the anti-stick section 220 and forms a cooling space 310 between it and the discharge pipe 200. The cooling sleeve 300 can be sleeved by coaxially placing it on the outside of the discharge pipe 200 and then fixing it to the discharge pipe 200 through flanges at both ends and sealing it with a sealing ring. Alternatively, the cooling sleeve 300 can be directly welded to the outer periphery of the discharge pipe 200 to form a closed sandwich structure. The peripheral wall of the cooling sleeve 300 has an air inlet 320 and an air outlet 330 for introducing and discharging cooling gas into and out of the cooling space 310.

[0030] During operation, the raw material enters the discharge pipe 200 from the raw material tank 100 and flows downward along the pipe under the combined action of gravity and negative pressure, passing through the discharge section 210, the anti-sticking section 220, and the feeding section 230 in sequence. When the raw material flows through the anti-sticking section 220 with a smaller pipe diameter, the flow velocity increases significantly at the same flow rate. The increased flow velocity shortens the residence time of the raw material in this section, reducing the contact time between the raw material and the pipe wall and reducing adhesion. Secondly, the increased flow velocity enhances the scouring effect of the airflow on the pipe wall, making it easier for the raw material, which might have adhered to the pipe wall due to gravity, to move downward under the drive of the high-speed airflow and making it difficult to form initial adhesion on the pipe wall. Thirdly, the smaller pipe diameter reduces the amount of material that the pipe can hold at the same height, thus allowing the cooling energy provided by the cooling sleeve to be more concentrated on the smaller material capacity, thereby improving the cooling efficiency and ensuring a more sufficient temperature drop for the raw material when flowing through the anti-sticking section 220.

[0031] Meanwhile, cooling gas is continuously introduced into the cooling sleeve 300, and heat is transferred into the cooling space 310 through the wall of the discharge pipe 200. Because the anti-sticking section 220 has a small diameter, relatively fixed wall thickness, and is completely covered by the cooling sleeve 300, the heat transfer efficiency is high. The surface temperature of the raw material flowing through this section is rapidly reduced. Since the viscosity of the raw material is positively correlated with temperature, its viscosity decreases as the temperature drops, significantly weakening the adhesion between the raw material and the pipe wall. Even if the raw material comes into contact with the pipe wall due to gravity, it is more likely to move downwards under the airflow and is less likely to form a stable adhesion layer. This avoids the oxidation and deterioration problems caused by the raw material adhering to the pipe wall and remaining in a high-temperature environment for a long time in traditional methods, ensuring the purity and freshness of the raw material entering subsequent extraction processes, thereby guaranteeing the extraction purity of vitamin B12 and the quality stability of the final food additive. Furthermore, because the occurrence of wall adhesion and pipe blockage is suppressed, the continuous conveying cycle is extended, reducing the risk of raw material loss, production interruption, and hygiene contamination caused by pipe disassembly and cleaning.

[0032] It should be noted that the cooling sleeve 300 can be assembled from separate components. Specifically, [follow the instructions]. Figures 1-3 The cooling sleeve 300 can be divided into upper and lower parts, which are then fitted together for assembly.

[0033] In a further example, the anti-sticking section 220 includes a first shrinkage section 221, a first transition section 222 located between the first shrinkage section 221 and the discharge section 210, a second shrinkage section 223 located below the first shrinkage section 221, and a second transition section 224 connecting the first shrinkage section 221 and the second shrinkage section 223.

[0034] The first contraction section 221 is eccentrically arranged relative to the discharge section 210, and the inner wall of the first contraction section 221 is tangent to the inner wall of the discharge section 210 at a single point in the circumferential direction. The inlet position of the first contraction section 221 is offset to one side relative to the central axis of the discharge section 210, so that, under the premise that the discharge section 210 and the first contraction section 221 are set at a fixed height, a first transition section 222 with a larger inclination angle and a longer inclined surface can be set. The inner diameter of the first transition section 222 gradually contracts from top to bottom, forming an inclined guide slope. This gradual structure avoids the convex corner area generated by the step contraction, so that the material will not be stuck at the structural abruptness when entering the first contraction section 221 from the discharge section 210. At the same time, the inclined transition section can support part of the material falling from above and guide it along the slope to the first contraction section 221. The second contraction section 223 is eccentrically arranged relative to the feeding section 230, and the axis of the second contraction section 223 is parallel to and spaced apart from the axis of the first contraction section 221. The inner wall of the second contraction section 223 is tangent to the inner wall of the feeding section 230 at a single point in the circumferential direction. The second transition section 224 receives the material falling from the first contraction section 221 and guides it to the second contraction section 223.

[0035] During operation, the raw material flows downward from the discharge section 210, first entering the first transition section 222. Because the first transition section 222 is a gradually contracting inclined structure, some material falls onto this inclined surface under gravity instead of passing directly through in mid-air. The inclined surface supports and guides the material downward along the wall to the inner wall of the first contraction section 221. During this process, because the first contraction section 221 is eccentrically arranged relative to the discharge section 210, the inlet position of the first contraction section 221 shifts to one side, thus creating a flow between the discharge section 210 and the first contraction section 221. Within a limited height range, a larger tilt angle and a longer transition slope length are achieved. The larger the tilt angle, the smoother the material slides on the slope. The longer the transition slope, the more material can be supported and participate in the material guiding. As the material moves along the inclined wall, it maintains continuous contact with the pipe wall. Since the pipe wall is cooled at this time, the material achieves sufficient heat exchange by flowing along the wall. Compared with the method of material being suspended directly through the center of the pipe, the method of guiding the flow along the wall prolongs the contact time between the material and the low temperature pipe wall, thus improving the cooling effect.

[0036] Meanwhile, another portion of the material falls directly from the discharge section 210 into the first contraction section 221. Since this portion of material does not pass through the inclined wall of the first transition section 222 for guidance, its contact time with the low-temperature pipe wall is short, resulting in a relatively limited cooling effect. The material then enters the first contraction section 221. Within the first contraction section 221, due to the smaller pipe diameter and increased flow velocity, the contact time between the material and the pipe wall is further reduced, and the airflow scouring effect is enhanced. Simultaneously, the eccentric arrangement of the inner wall of the first contraction section 221 being tangent to the inner wall of the discharge section 210 creates a continuous vertical wall at the tangent position, allowing some material to smoothly fall directly from the discharge section 210 into the first contraction section 221, thus preventing material accumulation. After passing through the first contraction section 221, the material enters the second transition section 224. The second transition section 224 receives all the material falling from the first contraction section 221, including the portion that has been cooled by the inclined surface of the first transition section 222 and the portion that falls directly without being cooled by the inclined surface. The second transition section 224 also adopts an inclined structure to guide the material to the inner wall of the second contraction section 223, so that all the material flows along the inclined wall when entering the second contraction section 223, and undergoes sufficient contact and heat exchange with the low-temperature pipe wall again, thereby supplementing the cooling of the material that was not cooled enough before, and further enhancing the cooling effect of the already cooled material. The material then enters the second contraction section 223, where it undergoes another necking and accelerated scouring action. The inner wall of the second contraction section 223 is tangent to the inner wall of the feeding section 230 at a single point in the circumferential direction, so that the second contraction section 223 and the feeding section 230 also form a continuous wall surface in the vertical direction at the tangent position. When the material enters the feeding section 230 from the second contraction section 223, it can directly and smoothly transition without crossing steps or dead corners, thereby avoiding material accumulation due to structural abrupt changes when entering the feeding section 230.

[0037] In summary, the eccentric arrangement of the first contraction section 221 relative to the discharge section 210 maximizes the length and inclination angle of the transition slope within a limited height, thereby allowing some material to actively adhere to the low-temperature pipe wall under gravity and slide along the wall surface, achieving full contact and heat exchange between the material and the cooling wall surface. At the same time, by setting the second transition section 224 and the second contraction section 223, all the material is guided into the wall-adhering flow path, so that the temperature of the material continues to decrease and the viscosity continuously decreases under the alternating action of multiple wall-adhering cooling and necking acceleration, thus inhibiting the formation of the wall-adhering layer.

[0038] In a further example, the air inlet 320 is located on the lower side wall of the cooling sleeve 300, and the air outlet 330 is located at the upper end of the cooling sleeve 300, so that the cooling air forms an upward flow path within the cooling space 310. During operation, the cooling air enters the cooling space 310 from the lower air inlet 320. Since the air outlet 330 is located at the upper end of the cooling sleeve 300, the cooling air flows upward under the action of pressure difference or thermal buoyancy, forming a directional airflow from bottom to top. During this process, the cooling air first flows through and impacts the outer wall of the second transition section 224 located at the bottom of the cooling space 310. Since the second transition section 224 connects the first contraction section 221 and the second contraction section 223, and the axes of the first contraction section 221 and the second contraction section 223 are parallel to each other and spaced apart, and are not coaxial, the second transition section 224 has an inclined shape in structure. The airflow from bottom to top directly impacts the inclined wall, which enhances the heat exchange intensity in this area and strengthens the heat exchange efficiency of the material during the flow along the wall. In particular, for the material that fell directly into the first contraction section 221 without being cooled by the inclined surface, effective supplementary cooling is achieved here through enhanced heat exchange. The cooling air continues to flow upward and then impacts the outer wall of the first transition section 222 located in the upper part of the cooling space 310. Because the first contraction section 221 is eccentrically arranged relative to the discharge section 210, the first transition section 222 is structurally inclined. Its outer wall is fully impacted by the cooling air, which lowers the temperature of the inner wall of the first transition section 222. The material continuously contacts the low-temperature pipe wall at this point for heat exchange.

[0039] The cooling air flows from bottom to top, opposite to the downward flow of the material. This counter-current flow creates a significant temperature gradient between the cooling air and the warmer pipe walls and material as it rises, maintaining high heat exchange efficiency. The upward flow also prevents eddies or short circuits within the cooling space 310, ensuring the air flows through and covers the transition areas requiring enhanced heat exchange. Furthermore, in the anti-sticking section 220, except for the first and second transition sections 222 and 224, such as the straight pipe areas of the first and second contraction sections 221 and 223, although their outer walls are not directly impacted by the cooling air, the temperature of the entire cooling space 310 gradually decreases as the air continues to flow. The pipe walls in these areas exchange heat with the low-temperature environment of the cooling space 310 through radiation and conduction, causing their temperature to gradually decrease as well. This provides continuous cooling to the material, although the cooling rate is slower than in the directly impacted transition areas, it still provides effective auxiliary cooling.

[0040] In a further example, two baffles 400 are provided inside the cooling sleeve 300, and a vent 500 is formed between the baffles 400 and the inner wall of the cooling sleeve 300. The first contraction section 221 and the second contraction section 223 are located in the two vents 500 respectively. The baffles 400 can block and guide the cooling air to pass through the two vents 500 from bottom to top, and cool the material in the anti-stick section 220 tube through the tube wall of the anti-stick section 220. During operation, cooling air enters the cooling space 310 through the air inlet 320 at the lower part of the cooling sleeve 300. Due to the shielding effect of the baffle plate 400, the cooling air is guided to the vent 500 formed between the baffle plate 400 and the inner wall of the cooling sleeve 300. The lower baffle plate 400 first guides the cooling air to the vent 500 where the second contraction section 223 is located, so that the cooling air flows concentratedly through the outer wall area of ​​the second contraction section 223. Due to the concentrated scouring of the outer wall of the second contraction section 223 by the cooling air, the heat exchange efficiency of this area is significantly improved. After passing through the lower vent 500, the cooling air continues to flow upward. The upper baffle plate 400 further guides the cooling air to the vent 500 where the first contraction section 221 is located, so that the cooling air flows concentratedly through the outer wall area of ​​the first contraction section 221. The inner wall temperature is reduced through conduction through the pipe wall.

[0041] In summary, because the baffle plate 400 guides the cooling air to the vents 500 located at the first contraction section 221 and the second contraction section 223, the flow path of the cooling air changes from a diffuse distribution to a concentrated directional flow. The cooling air passes through the two vents 500 sequentially from bottom to top, and successively and concentratedly washes the outer walls of the second contraction section 223 and the first contraction section 221. This sequential guidance method ensures that both contraction sections receive sufficient cooling airflow, avoiding the problem of insufficient cooling in one contraction section due to uneven airflow distribution. At the same time, when the cooling air flows through the vents 500, because the flow cross-sectional area of ​​the vents 500 is smaller than that of the cooling sleeve 300, the flow velocity of the cooling air increases when passing through the vents 500, further enhancing the convective heat transfer coefficient of the outer wall of the contraction section, thereby strengthening the cooling effect, and thus more effectively reducing the material temperature and viscosity, and enhancing the anti-sticking effect.

[0042] In a further example, the valve 600 is disposed at a position of the discharge section 210 close to the raw material tank body 100, and can block or release materials through opening and closing actions. The cooling space 310 extends above the valve 600, so that the circumferential side wall of the discharge section 210 above the valve 600 can cool the materials falling on the valve 600. The valve 600 can be in the form of a butterfly valve, a ball valve or a gate valve, etc., and can be selected according to the material characteristics and hygiene requirements during implementation. For example, a sanitary butterfly valve is used, its valve body is connected to the pipeline through a flange, the valve plate and the valve seat adopt high-temperature-resistant food-grade sealing materials, and the opening and closing of the valve 600 are controlled by a pneumatic or electric actuator to achieve linkage control with the negative pressure system. In the attached drawings of this example, only the position of the valve 600 is represented by a simple diagram, and the specific selection form can be adjusted according to the actual situation. In terms of structural arrangement, the cooling sleeve 300 extends upward above the installation position of the valve 600.

[0043] During operation, at the start-up stage of conveying, the negative pressure system has not established a stable negative pressure environment. At this time, the valve 600 remains closed, and the raw materials falling from the raw material tank body 100 into the discharge section 210 are blocked by the valve 600 and temporarily stay in the pipeline above the valve 600. Since the cooling space 310 extends above the valve 600, the circumferential side wall of the discharge section 210 above the valve 600 is continuously cooled by the cooling space 310 and is in a low-temperature state. The materials falling into this area are cooled during the process of contacting the low-temperature pipe wall, and their viscosity decreases. Even if the materials temporarily stay above the valve 600, it is not easy to strongly adhere to the pipe wall. When the negative pressure system establishes a stable negative pressure, the valve 600 opens, and the materials enter the anti-sticking section 220 under the action of negative pressure and are conveyed downstream. At this time, since the materials have been pre-cooled and their viscosity has decreased, the risk of sticking to the wall during the subsequent conveying process is significantly reduced. At the shutdown stage of conveying, the negative pressure system gradually stops, the wind speed in the pipeline decreases, and the materials lose sufficient airflow support and decelerate and deposit. At this time, the valve 600 closes, blocking the subsequent materials from continuing to enter the pipeline, so that the residual material volume in the pipeline is controlled within the minimum range. At the same time, due to the continuous action of the cooling space 310, the materials deposited above the valve 600 remain in a low-viscosity state in the low-temperature pipe wall environment and are not easy to form a firm adhesion layer. When the valve 600 opens at the next start-up, the residual materials are re-introduced into the conveying flow under the action of negative pressure.

[0044] Through the above structure, during the start-up phase of the conveying process, valve 600 is used to block the material and cooling space 310 is used to pre-cool the temporarily stored material, preventing the material from entering the pipeline directly before the negative pressure is established and depositing and adhering due to insufficient flow rate. During the shutdown phase of the conveying process, valve 600 is used to cut off the material supply in time, and cooling space 310 is used to maintain the low viscosity of the deposited material, preventing the material from adhering to the pipe wall due to deceleration during the decrease in wind speed. Thus, during the two transient conditions with the highest risk of wall adhesion, namely the start-up and shutdown of the conveying process, the occurrence of material deposition and adhesion is effectively suppressed, ensuring the operational stability of the conveying system under all operating conditions.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A granule conveying device for vitamin B12 food additives, characterized in that, include: Raw material tank (100); The discharge pipe (200) is connected to the bottom of the raw material tank (100). The discharge pipe (200) includes a discharge section (210), an anti-sticking section (220) and a feeding section (230) connected sequentially from top to bottom. The diameter of the discharge section (210) and the diameter of the feeding section (230) are both larger than the diameter of the anti-sticking section (220). A cooling sleeve (300) is sleeved on the outer periphery of the discharge pipe (200). A cooling space (310) is formed between the cooling sleeve (300) and the discharge pipe (200) for cooling the raw material flowing through the anti-sticking section (220). The peripheral wall of the cooling sleeve (300) is provided with an air inlet (320) for sending cooling gas into the cooling space (310) and an air outlet (330) for discharging cooling gas.

2. The granule conveying device for vitamin B12 food additive according to claim 1, characterized in that, The anti-sticking section (220) includes a first shrinkage section (221), which is located in the middle of the anti-sticking section (220) and is eccentrically arranged relative to the discharge section (210).

3. The granule conveying device for vitamin B12 food additive according to claim 2, characterized in that, The anti-stick section (220) also includes a first transition section (222) located between the first shrinkage section (221) and the discharge section (210). The first transition section (222) gradually shrinks from top to bottom and can support part of the material and guide it to the first shrinkage section (221). The inner wall of the first contraction section (221) is tangent to the inner wall of the discharge section (210) at a single point in the circumferential direction.

4. The granule conveying device for vitamin B12 food additive according to claim 3, characterized in that, The anti-sticking section (220) further includes a second contraction section (223) located below the first contraction section (221) and a second transition section (224) connecting the first contraction section (221) and the second contraction section (223); The second contraction section (223) is eccentrically arranged relative to the feeding section (230), and the axis of the second contraction section (223) is parallel to and spaced apart from the axis of the first contraction section (221). The second transition section (224) can receive the material falling from the first contraction section (221) and guide it to the second contraction section (223).

5. A granule conveying device for vitamin B12 food additives according to claim 4, characterized in that, The inner wall of the second contraction section (223) is tangent to the inner wall of the feeding section (230) at a single point in the circumferential direction.

6. The granule conveying device for vitamin B12 food additive according to claim 5, characterized in that, The air inlet (320) is located at the lower part of the cooling sleeve (300), and the air outlet (330) is located at the upper end of the cooling sleeve (300) so that the cooling air flows from bottom to top.

7. A granule conveying device for vitamin B12 food additives according to claim 6, characterized in that, The outer walls of the first transition section (222) and the second transition section (224) that receive materials can be subjected to the impact of cooling air.

8. A granule conveying device for vitamin B12 food additives according to claim 7, characterized in that, The cooling sleeve (300) is provided with two baffles (400), and a ventilation opening (500) is formed between the baffles (400) and the inner wall of the cooling sleeve (300). The first contraction section (221) and the second contraction section (223) are respectively located in the two ventilation openings (500). The baffle (400) can block and guide the cooling air from bottom to top through the two vents (500) to cool the material in the anti-stick section (220) pipe.

9. A granule conveying device for vitamin B12 food additives according to claim 1, characterized in that, Also includes: A valve (600) is located at the upper part of the discharge section (210) and can be opened and closed to block or release material.

10. A granule conveying device for vitamin B12 food additive according to claim 9, characterized in that, The valve (600) is positioned below the top wall of the cooling sleeve (300), and the cooling space (310) is capable of cooling the material on the valve (600).

Images