A reactor with premix structure

Abstract

This utility model relates to the field of reaction vessel technology, and provides a reaction vessel with a premixed structure. It includes a powder tank with a receiving cavity, a partition dividing the receiving cavity into several receiving troughs, each receiving trough having an outlet, a premixing tube disposed below the powder tank, and several premixing components arranged along the length of the premixing tube. Each premixing component has a spiral guide surface facing the outlet, with the spiral guide surfaces of adjacent premixing components having opposite directions. By mixing the powder before feeding, the mixing uniformity is improved, energy consumption is reduced, and the technical problem of uneven mixing in existing reaction vessels is solved.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, specifically to a reaction vessel with a premixed material structure. Background Technology

[0002] In fields such as fine chemicals, pharmaceutical synthesis, and materials preparation, the premixing uniformity of multi-component powders directly affects reaction efficiency, product purity, and stability. Traditional reactor powder premixing processes suffer from insufficient proportioning precision, low mixing uniformity, and poor adaptability, making it difficult to meet the demands of high-end manufacturing for precise proportioning, deep mixing, and high energy efficiency. This has become a key bottleneck restricting production quality and efficiency.

[0003] Early reactor premixing methods mostly adopted a "one-time feeding + single stirring" model, lacking targeted material distribution and premixing design. Powders are usually fed through a single inlet, and different components (such as main materials, catalysts, and auxiliary materials) are prone to stratification during the feeding process due to differences in particle size and density, resulting in deviations in the initial proportion.

[0004] The problem of insufficient uniformity in traditional mixing structures is particularly prominent. Most premixing devices use a single spiral or impeller for mixing, where the powder can only rotate and diffuse in a single direction during flow, easily leading to agglomeration. For high-viscosity, easily agglomerated powders (such as nanoparticles and polymer particles), the shear force of a single spiral is insufficient to effectively disperse the aggregated particles, resulting in localized component enrichment after mixing.

[0005] In multi-component systems, traditional mixing techniques are inefficient and energy-intensive. To improve uniformity, it is often necessary to extend the mixing time or increase the stirring speed, which not only increases equipment energy consumption (mixing energy consumption accounts for more than 30% of the total reaction energy consumption), but may also cause powder particle breakage (such as crystal structure destruction) due to excessive shearing, affecting the reaction activity.

[0006] The traditional design of the connection between the premixing process and the main body of the reactor is unreasonable, and the premixed powder is prone to secondary stratification when it enters the reactor. Due to the lack of a continuous premixing channel, the powder will separate again due to gravity settling during the transportation process, resulting in a decrease in the uniformity of the raw materials entering the reactor and negating the effect of the initial premixing. Utility Model Content

[0007] To overcome the above-mentioned defects, the embodiments of this utility model provide a reaction vessel with a premixed structure, which solves the technical problem of uneven mixing in the reaction vessel in the prior art.

[0008] According to one aspect, at least one embodiment of the present invention provides a reaction vessel having a premixed structure, comprising: A powder container, wherein the powder container has a material receiving cavity; A partition divides the material chamber into several material troughs, each material trough having an outlet. A premixing pipe is disposed below the powder tank, and the outlet leads to the premixing pipe. The premixing pipe is used for material premixing. A premixing element is disposed inside the premixing tube. There are several premixing elements arranged along the length of the premixing tube. Each premixing element has a spiral guide surface facing the outlet, and the spiral guide surfaces of two adjacent premixing elements have opposite spiral directions.

[0009] As a further technical solution, the premixed component includes: A fixing member is disposed on the inner wall of the premixed pipe, and the fixing member has a fixing cavity; The guide vanes are a plurality of them, arranged circumferentially within the fixed cavity, and each guide vane has a helical guide surface.

[0010] As a further technical solution, the fixing member has a stepped portion, and the premixing member further includes: A bearing component, wherein the bearing component is disposed on the stepped portion; A rotating sleeve is disposed on the inner ring of the bearing component, and guide vanes are circumferentially arranged on the rotating sleeve. The rotating sleeve has a guide portion that extends upward from the inner ring of the bearing component and abuts against the cavity wall of the fixed cavity.

[0011] As a further technical solution, the guide vane has a straight section and a deflecting section arranged from top to bottom. The straight section is perpendicular to the horizontal plane, and the deflecting section smoothly transitions to the straight section. The deflecting section has the spiral guide surface.

[0012] As a further technical solution, the height of the straight section is greater than the height of the turning section.

[0013] As a further technical solution, it also includes: A horizontal screw conveyor is disposed below the premixing pipe, the premixing pipe leading to the horizontal screw conveyor, the horizontal screw conveyor having a conveying chamber, and a water inlet on the lower wall of the conveying chamber; A reaction vessel is disposed below the horizontal screw conveyor. The reaction vessel has a reaction chamber with a feed inlet and a liquid inlet. The horizontal screw conveyor leads to the feed inlet. A stirring element is rotatably mounted at the bottom of the reactor.

[0014] As a further technical solution, it also includes: The horizontal screw conveyor is connected to the feed inlet via a connecting pipe. An isolation valve is disposed in the middle of the connecting pipe; The powder feeding pipe is connected to the horizontal screw conveyor through the powder feeding pipe; The return pipe has one end located on the side of the isolation valve near the horizontal screw conveyor and connected to the connecting pipe, and the other end connected to the powder feeding pipe. Both ends of the return pipe are equipped with check valves.

[0015] As a further technical solution, the horizontal screw conveyor includes: A feeding shell having the conveying cavity; Two spiral feeding augers are arranged symmetrically along the vertical plane of the central axis of the conveying chamber, and the water inlet is located on the central axis of the lower wall of the conveying chamber.

[0016] As a further technical solution, it also includes: A dust suppression component is disposed on the upper wall of the conveying chamber and is used to spray liquid onto the spiral feeding auger.

[0017] As a further technical solution, the dust suppression component has a circumferential nozzle that is inclined upwards and faces the upper wall of the conveying chamber.

[0018] The beneficial effects of this utility model are as follows: In this invention, the premixing tube is located below the powder tank, and several premixing components are arranged inside it along the length direction. Each premixing component is provided with a spiral guide surface facing the outlet of the container. When different powders enter the premixing tube from their respective outlets, they first come into contact with the first premixing component. The spiral guide surface guides the powder to flow along the spiral trajectory, causing the powder that originally fell in layers to rotate and diffuse, thus achieving preliminary cross-mixing.

[0019] The spiral guide surfaces of two adjacent premixing units have opposite spiral directions (e.g., the first one is left-handed and the second one is right-handed): when the powder that has undergone preliminary mixing flows to the next premixing unit, the reverse spiral will force a change in the rotation direction of the powder. During the turning process, the powder particles collide and shear each other due to inertia, and the originally aggregated single components are further dispersed. At the same time, the disturbance formed by the reverse spiral will cause the powder to form a composite axial and radial motion in the premixing tube, promoting the deep mixing of different components. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 for Figure 1 A schematic diagram of the powder tank in the embodiment; Figure 3 for Figure 2 A schematic diagram of the powder container from one angle; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA; Figure 5 for Figure 1 A schematic diagram of the structure of the horizontal screw conveyor in the embodiment; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of BB; Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure of the C-C section; Figure 8 for Figure 1 An internal schematic diagram of the premixed component in the embodiment; Figure 9 for Figure 1 A schematic diagram of the reactor structure in the embodiment; Figure 10 for Figure 1 A schematic diagram of the dust suppression component in the embodiment; Figure 11 for Figure 1 The embodiment is a schematic diagram of the fluid circuit system related to the connecting pipe.

[0022] In the diagram: Powder tank-1, Material chamber-101, Material trough-103, Outlet-104, Baffle-2, Premix pipe-3, Premixing component-4, Spiral guide surface-401, Fixing component-402, Fixing cavity-403, Guide blade-404, Stepped section-405, Bearing component-406, Rotating sleeve-407, Guide section-408, Straight section-409, Directional section-410, Horizontal screw conveyor-5, Conveying chamber-501, Water inlet-503, Feeding shell-502, Spiral feeding auger-504, Reactor-6, Feed inlet-601, Liquid inlet-602, Stirring component-7, Connecting pipe-8, Isolation valve-9, Powder feeding pipe-10, Liquid return pipe-11, Stop valve-12, Dust suppression component-13, Circumferential nozzle-1301. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0024] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0025] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] like Figures 1-11 As shown, a reaction vessel with a premixed structure according to an embodiment of the present invention is illustrated. The vessel includes a powder tank 1, which has a receiving cavity 101. A partition 2 divides the receiving cavity 101 into several receiving troughs 103. Each receiving trough 103 has an outlet 104. A premixing tube 3 is disposed below the powder tank 1. Several premixing components 4 are disposed inside the premixing tube 3 and are arranged along the length of the premixing tube 3. Each premixing component 4 has a spiral guide surface 401 facing the outlet 104. The spiral guide surfaces 401 of two adjacent premixing components 4 have opposite spiral directions.

[0030] In some examples, the material storage chamber 101 of the powder tank 1 is divided into several independent material storage tanks 103 by the partition 2. Each material storage tank can store a single type of powder (such as catalyst, main material, auxiliary material, etc.). By controlling the opening degree or opening and closing time of the outlet 104 of each material storage tank, the ratio of different powders can be precisely adjusted, avoiding the problem of ratio deviation caused by the one-time feeding in traditional mixing. It is especially suitable for multi-component reaction systems.

[0031] The premixing tube 3 is located below the powder tank 1. Several premixing components 4 are arranged along the length of the tube. Each premixing component 4 is provided with a spiral guide surface 401 facing the outlet 104 of the material container. When different powders enter the premixing tube 3 from their respective outlets, they first come into contact with the first premixing component 4. The spiral guide surface 401 guides the powder to flow along the spiral trajectory, causing the powder that originally fell in layers to rotate and diffuse, thus achieving preliminary cross-mixing.

[0032] The spiral guide surfaces 401 of two adjacent premixing components 4 have opposite spiral directions (e.g., the first one is left-handed and the second one is right-handed): when the powder that has undergone preliminary mixing flows to the next premixing component 4, the reverse spiral will force a change in the rotation direction of the powder. During the turning process, the powder particles collide and shear each other due to inertia, and the originally aggregated single components are further dispersed. At the same time, the disturbance formed by the reverse spiral will cause the powder to form a composite axial and radial motion in the premixing tube 3, promoting the deep mixing of different components.

[0033] This alternating action of "forward spiral initial mixing - reverse spiral forced dispersion" allows the powder to complete multiple rounds of "mixing-dispersion-remixing" cycles as it flows through the premixing tube 3. Compared to traditional single spiral mixing, this improves premixing uniformity and shortens mixing time. Furthermore, the number of premixing components 4 can be adjusted according to powder characteristics (such as particle size and density). By increasing the number of premixing components or shortening the spacing, it can meet the premixing needs of high-viscosity, easily agglomerated powders.

[0034] The baffle 2 ensures the accuracy of raw material separation and proportioning. The premixing tube 3 and the premixing component 4 enhance the mixing effect through spiral guidance and reverse disturbance, so that the powder reaches a high degree of uniformity before entering the main body of the reactor, reducing the mixing energy consumption in subsequent reactions, improving reaction efficiency and product stability. It is especially suitable for scenarios with strict requirements for raw material mixing, such as fine chemical industry and pharmaceutical synthesis.

[0035] In some examples, the premix 4 includes a fixing member 402 disposed on the inner wall of the premix tube 3. The fixing member 402 has a fixing cavity 403. Several guide vanes 404 are arranged circumferentially in the fixing cavity 403. The guide vanes 404 have a spiral guide surface 401.

[0036] The fixing member 402 serves as the base of the premixing component 4 and is fixed to the inner wall of the premixing pipe 3. The fixing cavity 403 at its center provides installation space for the guide vanes 404. Several guide vanes 404 are evenly arranged circumferentially within the fixing cavity 403 (e.g., 3-6 vanes). The surface of each vane is a spiral guiding surface 401, and a spiral channel for powder flow is formed between the vanes. This structure allows the powder to be guided not only by a single spiral surface when flowing through the premixing component 4, but also to be divided into several branches by multiple sets of vanes. Each branch moves along an independent spiral trajectory, increasing the probability of powder particle collision.

[0037] The guide vanes 404 of adjacent premixing components 4 have opposite spiral directions (e.g., the first group is left-handed and the second group is right-handed). When the powder passes through the first group of vanes, it is divided into multiple left-handed spiral flows, and the particles diffuse towards the inner wall of the premixing tube 3 under the action of centrifugal force. When entering the next group of right-handed vanes, the flow direction is forcibly reversed, and the powder branches converge from the inner wall to the center. In the alternating process of "diffusion-convergence", a violent disturbance is formed, and the originally locally agglomerated powder components are completely dispersed. At the same time, the multi-blade design increases the total area of ​​the spiral guide surface 401 by 2-3 times, resulting in more sufficient contact with the powder and a significant improvement in guiding efficiency.

[0038] The fixing component 402 and the inner wall of the premixing pipe 3 can be detachably connected (e.g., with clips or bolts), facilitating the replacement of guide blades 404 with different pitches and numbers of blades according to the characteristics of the powder: for powders with larger particle sizes, blades with larger pitches can be selected to reduce resistance; for powders that are prone to agglomeration, the number of blades can be increased to enhance the cutting and dispersing effect. This modular design improves the adaptability of the equipment and can meet the premixing needs of multiple varieties and processes.

[0039] In some examples, the fixing member 402 has a stepped portion 405, the premixing member 4 also includes a bearing member 406, the bearing member 406 is disposed on the stepped portion 405, the rotating sleeve 407 is disposed on the inner ring of the bearing member 406, the guide vanes 404 are arranged circumferentially on the rotating sleeve 407, the rotating sleeve 407 has a guide portion 408, the guide portion 408 extends upward from the inner ring of the bearing member 406 and abuts against the cavity wall of the fixing cavity 403.

[0040] The stepped portion 405 of the fixing member 402 provides a precise installation reference for the bearing member 406, ensuring a rigid connection between the outer ring of the bearing and the fixing member, while the inner ring is fixed to the rotating sleeve 407. The guide vanes 404 are arranged circumferentially on the rotating sleeve 407. When the powder flows into the premixing pipe 3 from the outlet of the material container, the high-speed falling powder impacts the spiral guide surface 401 of the guide vanes 404, which drives the rotating sleeve 407 to rotate around the bearing member 406 (no additional power is required, realizing "material flow driven rotation"), thus upgrading the guide vanes from static guidance to dynamic shear mixing.

[0041] The rotating spiral guide surface 401 will generate continuous centrifugal force and shear force on the powder, breaking up the agglomerated powder particles and pushing the powder to make circular motion along the spiral trajectory, increasing the collision frequency of different component particles. The rotating blades will break the laminar flow state of the powder, so that the powder in the premixing tube 3 forms a composite motion of axial propulsion and radial diffusion, avoiding the areas of insufficient powder mixing that appear in the static blades.

[0042] The guide portion 408 of the rotating sleeve 407 extends upward from the inner ring of the bearing component 406 and abuts against the cavity wall of the fixed cavity 403. This structure plays a dual stabilizing role: first, it restricts the radial wobble of the rotating sleeve 407, ensures the concentricity of the guide blade 404 when it rotates, and avoids friction between the blade and the inner wall of the premixing pipe 3; second, through the sliding contact between the guide portion 408 and the wall of the fixed cavity 403, it guides the powder to flow orderly along the blade gap, preventing the powder from accumulating and clogging in the bearing area.

[0043] With the adjacent premixing components 4 having opposite spiral guide surfaces 401, the rotation direction of the rotating sleeve 407 will also be opposite due to the difference in the spiral direction of the blades (e.g., the first set of left-handed blades rotates clockwise, and the second set of right-handed blades rotates counterclockwise). The reverse rotation will cause the powder to generate a violent turning disturbance when flowing through the adjacent premixing components. The powder flow that was originally rotating in a single direction is forced to be cut in the opposite direction, further improving the mixing uniformity.

[0044] Compared to static premixing components, this design shortens the powder premixing time and can adapt to the dispersion requirements of high-viscosity, easily agglomerated powders, providing more uniform raw material pretreatment for subsequent reactions in the reactor.

[0045] In some examples, the guide vane 404 has a straight section 409 and a deflecting section 410 running from top to bottom. The straight section 409 is perpendicular to the horizontal plane, and the deflecting section 410 smoothly transitions to the straight section 409. The deflecting section 410 has a helical guide surface 401.

[0046] The straight section 409 is set perpendicular to the horizontal plane. When the powder falls from the outlet of the powder tank 1 into the premixing pipe 3, it first contacts the straight section 409. The vertical structure of the straight section 409 can "axially guide" the high-speed falling powder: on the one hand, it initially integrates the dispersed powder flow into a stable axially advancing bundle, avoiding splashing, deflection, or local accumulation caused by the direct impact of gravity on the spiral surface (especially suitable for powders with fine particle size and easy dust generation); when the rotating sleeve 407 rotates, the straight section 409 will form a "rigid guide plate" effect, and the radial centrifugal force generated by the rotation will push the material flow evenly to all parts of the cross section of the premixing pipe 3, avoiding the powder from concentrating in the central area or flowing along the wall, laying a uniform material flow foundation for subsequent direction-changing mixing.

[0047] The deflection section 410 and the straight section 409 adopt a smooth transition design (such as a circular arc or a gradually changing slope connection), eliminating sharp corners at the blade turning points. This reduces powder flow resistance and avoids energy loss or powder retention caused by local turbulence (especially for high-viscosity, easily agglomerated powders, it can reduce accumulation on the blade surface). The spiral guide surface 401 of the deflection section 410 is the core area for achieving mixing. As the material flow enters the deflection section from the straight section, the spiral surface gradually applies tangential force to the material flow, smoothly transforming the axially moving powder into a composite motion of "axial propulsion + circumferential rotation"—this gradual turning avoids the material flow turbulence caused by "hard turning," allowing powder particles more time to collide and penetrate with adjacent components during the turning process.

[0048] The straight section 409 addresses the "disorderly impact" problem during the initial stage of powder descent, ensuring uniform material distribution. The deflecting section 410 achieves "orderly disturbance" through a smooth spiral, enhancing the mixing effect without compromising the overall flow field stability. This design is particularly suitable for the premixing needs of multi-component powders with different properties (such as powders with different densities and large particle size differences): the uniform flow guidance of the straight section avoids the stratification problem of heavy powders sinking and light powders floating; the dynamic spiral shearing of the deflecting section breaks the natural stratification caused by density differences through rotational centrifugal force, forcing different component particles to cross-mix.

[0049] The vertical surface of the straight section 409 and the smooth spiral surface of the deflecting section 410 reduce dead corners for powder residue, which can be quickly cleaned by high-pressure airflow or cleaning fluid, reducing the risk of cross-contamination between different batches of powder.

[0050] In summary, the straight section 409 and the direction-changing section 410 of the guide vane 404, through functional differentiation and synergy, not only ensure the initial stability of the powder flow, but also enhance the dynamic mixing effect through progressive spiral turning. Combined with the rotation of the rotating sleeve and the reverse spiral layout, a premixed flow field of "uniform flow distribution - dynamic shearing - reverse recombination" is formed in the premixing tube 3, providing a more uniform raw material basis for the subsequent main reaction in the reactor, and significantly improving the reaction efficiency and product quality stability.

[0051] In some examples, the height of the straight section 409 is greater than the height of the turning section 410.

[0052] The straight section 409 is taller, resulting in a longer distance for the powder to travel from entering the premixing tube 3 to contacting the spiral direction-changing structure. The higher drop of the straight section 409 allows gravity to accelerate and stabilize the axial movement of the powder, reducing local accumulation caused by uneven falling speed (especially in scenarios where multiple troughs are fed simultaneously, different powders can first complete initial axial overlap in the straight section, avoiding lateral flow deviation). When the rotating sleeve 407 rotates, the taller straight section 409 can generate a wider radial centrifugal force field, pushing the powder more evenly across the entire cross-section of the premixing tube 3, providing a more uniform initial distribution for subsequent direction-changing mixing.

[0053] The smaller height of the deflection section 410 makes the pitch of the helical guide surface 401 more compact (for the same helical angle, a smaller height results in a shorter pitch). When the powder enters the deflection section 410, the contact frequency between the helical surface and the powder per unit length is higher, and the shear force is more concentrated, which can quickly convert axial motion into rotational motion and avoid "power attenuation" (i.e., the rotational kinetic energy of the material flow weakens with increasing distance) caused by an excessively long deflection section. At the same time, the shorter deflection section can reduce the residence time of the powder on the helical surface, reducing the risk of adhesion caused by prolonged contact of high-viscosity powder with the blades, which is especially suitable for powder premixing scenarios containing viscous additives.

[0054] In some examples, a horizontal screw conveyor 5 is also included, which is located below the premixing pipe 3, which leads to the horizontal screw conveyor 5. The horizontal screw conveyor 5 has a conveying chamber 501, and the lower wall of the conveying chamber 501 has a water inlet 503. A reaction vessel 6 is located below the horizontal screw conveyor 5 and has a reaction chamber with a feed inlet 601 and a liquid inlet 602. The horizontal screw conveyor 5 leads to the feed inlet 601. A stirring element 7 is rotatably located at the bottom of the reaction vessel 6.

[0055] The horizontal screw conveyor 5 is located below the premixing pipe 3. Its conveying chamber 501 receives the uniform powder output from the premixing pipe 3. Its core function is to complete the initial mixing of powder and liquid during the conveying process and stably send the material into the reaction vessel 6.

[0056] The water inlet 502 on the lower wall of the conveying chamber 501 can be connected to water, solvent or liquid reactant. The liquid is sprayed directly into or flows into the conveying chamber 501 through the water inlet 503 and comes into contact with the premixed powder.

[0057] When the spiral blades rotate, on the one hand, they push the powder to move along the axial direction of the conveying chamber, and on the other hand, through the shearing action between the blades and the chamber wall, they force the liquid introduced by the inlet 503 to mix with the powder to form a uniform wet material or slurry (to avoid uneven mixing caused by "dry material accumulation" when the powder enters the reactor directly).

[0058] The conveying speed of the screw conveyor can be adjusted by the motor speed. Combined with the powder output of the premixing pipe 3, it can achieve continuous and stable feeding of the reactor 6, avoiding the fluctuation of reaction parameters caused by traditional intermittent feeding.

[0059] The pushing action of the spiral blades can effectively prevent wet materials from sticking and clogging in the conveying chamber 501, which is especially suitable for powders containing viscous components; the flow rate of the water inlet 502 can be adjusted independently to adapt to the liquid-solid ratio requirements of different materials (such as adjusting the water volume to control the slurry concentration).

[0060] The reactor 6 is located below the horizontal screw conveyor 5 and serves as the core container for the raw material reaction. Its reaction chamber receives the pre-treated materials sent by the conveyor through the feed port 601 and is supplemented with additional liquids (such as reactants and solvents) through the liquid inlet 602, providing a closed and controllable environment for the reaction.

[0061] The stirring element 7 is rotatably located at the bottom of the reactor 6. It is usually a paddle, anchor, or turbine stirring structure, driven by a motor to rotate at high speed. It is a key component to ensure that the materials in the reaction chamber are fully mixed and react evenly.

[0062] When the agitator 7 rotates, it generates strong axial and radial stirring flow, which thoroughly mixes the wet material entering through the feed inlet, the liquid added through the liquid inlet, and the original material in the cavity, breaking down local concentration and temperature differences and avoiding "dead zones" (such as bottom material sedimentation that has not participated in the reaction). For high-viscosity reaction systems, the shear force of the agitator 7 can also promote particle dispersion or droplet breakage, accelerating the reaction rate.

[0063] The rotational speed of the agitator 7 can be adjusted in conjunction with the feeding rate of the horizontal screw conveyor 5. When the feeding rate increases, the agitation speed is increased to ensure that the newly introduced material is quickly integrated into the reaction system and to maintain stable reaction parameters.

[0064] Pre-treatment and unloading: The premixing pipe 4 solves the problem of powder uniformity, and the horizontal screw conveyor 5 completes the initial mixing of liquid and solid, so that the material entering the reactor has a high degree of mixing, reducing the energy consumption and time of stirring in the reactor.

[0065] Whether it is solid-phase premixing of multi-component powders, liquid-solid reaction, or slurry reaction, this system can be adapted through modular structure (such as replacing the 404 premix blades and adjusting the screw conveyor parameters), making it particularly suitable for scenarios with stringent requirements for raw material uniformity and reaction stability, such as fine chemical industry, pharmaceutical intermediate synthesis, and food additive production.

[0066] In some examples, the connecting pipe 8 serves as a channel between the horizontal screw conveyor 5 and the feed inlet 601 of the reactor 6 (its diameter and length are adapted to the material flow rate), ensuring that the pretreated wet material or slurry is transported to the reactor without leakage or stagnation, avoiding material splashing or accumulation that may occur with traditional direct docking. An isolation valve 9 (such as a ball valve, gate valve, or butterfly valve) is located in the middle of the connecting pipe 8. Its core function is to cut off or connect the feed flow from the horizontal screw conveyor 5 to the reactor 6. When the reactor needs maintenance, cleaning, or reaction parameter adjustment, closing the isolation valve 9 allows for flexible operation of "conveyor not stopping but reactor not feeding," avoiding production interruptions caused by a complete system shutdown; during normal operation, it is opened to ensure continuous material transport.

[0067] The powder feeding pipe 10 connects the premixing pipe 3 to the horizontal screw conveyor 5, serving as the channel for the premixed dry powder to enter the conveyor. Compared to the premixing pipe 3 being directly connected to the conveyor, the powder feeding pipe 10 can be adjusted in direction (such as tilting or bending) according to layout requirements, adapting to the equipment installation space. It also facilitates the addition of auxiliary control components such as flow meters and valves on the pipeline to accurately monitor the powder conveying volume.

[0068] The return pipe 11 forms a circulation path of "connecting pipe 8 (conveyor side) → powder feeding pipe 10", and the check valves 12 at both ends (such as one-way valves or manual valves) control the opening and closing of this path. Its function is to recover residual liquid (or liquid-containing wet material) in the horizontal screw conveyor 5 to prevent liquid accumulation, blockage or deterioration when the machine is stopped.

[0069] During normal production, the isolation valve 9 is opened, and the wet material processed by the horizontal screw conveyor 5 continuously enters the reactor 6 through the connecting pipe 8, forming a synergistic effect with the mixing of the agitator 7 to maintain the continuity of the reaction. When the reactor needs to be temporarily shut down (such as for sampling and testing or temperature adjustment), the feed can be cut off by closing the isolation valve 9, while the horizontal screw conveyor 5 can continue to receive the powder from the premixing pipe 3 (through the powder feeding pipe 10) and perform liquid-solid initial mixing. After the reactor resumes operation, the isolation valve 9 can be opened to quickly resume production and reduce system restart time.

[0070] When the isolation valve 9 is closed (the reactor is cut off from material) but the horizontal screw conveyor 5 is still running, the liquid-containing wet material in the conveying chamber 501 that has not been discharged in time may become stuck and clogged due to retention. At this time, the check valves 12 at both ends of the return pipe 11 are opened, and the liquid (or thin wet material) in the conveying chamber 501 can flow back into the powder conveying pipe 10 through the return pipe 11 under the pushing pressure of the screw blades, remix with the newly entered premixed powder, and re-enter the conveyor for processing, thus realizing the recycling of liquid.

[0071] When the horizontal screw conveyor 5 needs to be cleaned, the check valve 12 and the isolation valve 9 are opened, and the cleaning fluid circulates in the pipe to clean, reducing the labor intensity during cleaning.

[0072] In some examples, the horizontal screw conveyor 5 includes a feeding shell 502 with a conveying cavity 501, two screw conveyors 504 symmetrically arranged along the vertical plane where the central axis of the conveying cavity 501 is located, and the inlet 503 is located on the central axis of the lower wall of the conveying cavity 501.

[0073] Two spiral feeding augers 504 are symmetrically arranged vertically along the central axis of the conveying chamber 501 (i.e., forming a "twin-screw" structure). Their spiral blades rotate in opposite directions but in the same direction (e.g., both rotate clockwise). When the two rollers rotate, a cross-shearing zone is formed between the blades. The premixed powder and the liquid injected through the inlet 502 are repeatedly torn and fused under shearing force. The liquid-solid contact area is increased compared to a single spiral structure, making it suitable for mixing high-viscosity liquids and powders, and can quickly form a uniform slurry.

[0074] The symmetrically distributed double rollers generate opposing pushing forces on the material, avoiding the "deviation" (material accumulation on one side of the wall) that may occur with a single spiral, so that the wet material is stably pushed along the central axis of the conveying chamber 501, reducing the accumulation and blockage at the inlet of the connecting pipe 8.

[0075] The inlet 502 is located on the central axis of the lower wall of the conveying chamber 501 (i.e., the center of symmetry of the double spiral feeding auger). After the liquid is injected through this inlet, it can directly enter the shearing and mixing zone of the double rollers. The liquid at the central axis position can be quickly carried by the spiral blades on both sides and diffused to the entire cross section of the conveying chamber 501, avoiding the problems of "local over-wetting" or "local dry material" caused by liquid injection from one side, thus improving the uniformity of liquid-solid mixing.

[0076] In some examples, a dust suppression element 13 is also included, which is disposed on the upper wall of the conveying chamber 501 for spraying liquid onto the screw conveyor 504.

[0077] Dust suppression component 13 is installed on the upper wall of the conveying chamber 501, with its spray direction pointing directly at the working area of ​​the double-spiral feeding auger 504 (i.e., the core area where powder falls and is conveyed). When the premixed dry powder enters the conveying chamber 501 through the powder feeding pipe 10, dust is easily generated due to collision and friction when the powder comes into contact with the spiral feeding auger 504 (especially for lightweight, fine-particle powders, such as talc and calcium carbonate). The dust suppression component 13 can quickly wet the surface of the powder by spraying liquid (such as clean water or solvent required by the process), reducing the probability of dust flying. The liquid forms a water film on the surface of the powder particles, using surface tension to agglomerate the fine dust particles, preventing them from spreading out of the conveying chamber with the airflow, thus reducing the dust concentration in the working environment.

[0078] The symmetrical shearing action of the double-helix feeding auger forces the sprayed liquid and powder to mix, further dispersing the wetted powder during the conveying process and preventing localized over-wetting or clumping. Combined with the main liquid supply from the central inlet 502, the dust suppression spray forms a three-dimensional liquid distribution pattern of "top spraying + bottom water inlet," increasing the liquid-solid contact area compared to a single inlet and further improving mixing uniformity. This is particularly suitable for moisture-sensitive powders (e.g., to prevent dust generation due to localized dryness or adhesion due to localized over-wetting). For ultrafine powders that are highly prone to dust generation, the spray volume can be increased to enhance the dust suppression effect; for highly absorbent powders (such as cement and gypsum), the spray volume should be reduced to avoid excessive wetting and increased conveying resistance. In some examples, the dust suppression component 13 has a circumferential nozzle 1301 that is tilted upward toward the upper wall of the conveying chamber 501.

[0079] After the powder enters the conveying chamber 501 through the powder feeding pipe 10, under the rotational shearing action of the double-helix feeding auger 504, some lightweight powder or ultrafine particles are easily dispersed upwards due to airflow disturbance, adhering to the upper wall of the conveying chamber or overflowing from the gaps to form dust. The circumferential nozzles 1301 are distributed around the circumference of the upper wall of the conveying chamber (e.g., 3-6 evenly arranged), and the spraying direction is inclined upwards and points directly at the upper wall surface. The sprayed liquid (e.g., water, process solvent) can form a uniform liquid film on the upper wall of the conveying chamber: the liquid film can quickly adsorb the dust particles dispersed to the top, and use the surface tension of the liquid to agglomerate the dust, preventing it from being rolled up by the airflow again; the circumferentially distributed nozzles cover the entire circumference of the upper wall of the conveying chamber, with no spray dead corners, achieving 360° dust suppression without dead corners, which improves the dust suppression efficiency compared to traditional single-sided spraying.

[0080] After wetting the dust on the upper wall, the upward-spraying liquid forms a fine stream under gravity, which slides down the upper wall of the conveying chamber to the working area of ​​the double-helix feeding auger 504. There, it mixes again with the liquid injected into the central shaft water inlet 502 and the powder pushed by the spiral feeding auger, forming a closed loop of "spraying-adsorption-recirculation-remixing". The dust-laden liquid that flows back directly participates in the liquid-solid mixing, which prevents the dust from accumulating on the wall surface for a long time and forming a caking (especially for highly viscous powder, it can reduce the frequency of cleaning the upper wall). After the liquid is dispersed by the circumferential nozzle, it forms a three-dimensional liquid distribution pattern of "upper spraying + lower water inlet" with the main liquid in the central shaft water inlet, which further improves the uniformity of liquid-solid contact and avoids the problem of local dry material or excessive wetness.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A reactor with premix structure, characterized in that, include: Powder container (1), the powder container (1) having a material receiving cavity (101); A partition (2) divides the material chamber (101) into several material tanks (103), each of which has an outlet (104). A premixing pipe (3) is provided below the powder tank (1), and the outlet (104) leads to the premixing pipe (3). The premixing pipe (3) is used for material premixing. A premixed component (4) is disposed inside the premixed tube (3). There are several premixed components (4) arranged along the length of the premixed tube (3). Each premixed component (4) has a spiral guide surface (401) facing the outlet (104). The spiral guide surfaces (401) of two adjacent premixed components (4) have opposite spiral directions.

2. The reactor with premix structure according to claim 1, characterized in that, The premix (4) includes: A fixing member (402) is disposed on the inner wall of the premixed pipe (3), and the fixing member (402) has a fixing cavity (403). Guide vanes (404), there are several guide vanes (404) arranged circumferentially in the fixed cavity (403), and the guide vanes (404) have the spiral guide surface (401).

3. The reactor with premix structure according to claim 2, characterized in that, The fastener (402) has a stepped portion (405), and the premixed component (4) further includes: A bearing component (406) is disposed on the stepped portion (405); A rotating sleeve (407) is disposed on the inner ring of the bearing component (406). The guide vanes (404) are arranged circumferentially on the rotating sleeve (407). The rotating sleeve (407) has a guide portion (408) that extends upward from the inner ring of the bearing component (406) and abuts against the cavity wall of the fixed cavity (403).

4. The reactor with premix structure according to claim 2, characterized in that, The guide vane (404) has a straight section (409) and a deflecting section (410) arranged from top to bottom. The straight section (409) is perpendicular to the horizontal plane. The deflecting section (410) smoothly transitions to the straight section (409). The deflecting section (410) has the spiral guide surface (401).

5. The reactor with premix structure according to claim 4, characterized in that, The height of the straight section (409) is greater than the height of the directional section (410).

6. The reactor with premix structure according to claim 1, characterized in that, Also includes: A horizontal screw conveyor (5) is provided below the premix pipe (3), the premix pipe (3) leads to the horizontal screw conveyor (5), the horizontal screw conveyor (5) has a conveying chamber (501), and the lower wall of the conveying chamber (501) has a water inlet (503). The reactor (6) is located below the horizontal screw conveyor (5). The reactor (6) has a reaction chamber with a feed inlet (601) and a liquid inlet (602). The horizontal screw conveyor (5) leads to the feed inlet (601). A stirring element (7) is rotatably disposed at the bottom of the reactor (6).

7. The reactor with premix structure according to claim 6, characterized in that Also includes: The horizontal screw conveyor (5) is connected to the feed inlet (601) through the connecting pipe (8); Isolation valve (9), the isolation valve (9) is disposed in the middle of the connecting pipe (8); The powder feeding pipe (10) is connected to the horizontal screw conveyor (5) through the powder feeding pipe (10); The return pipe (11) has one end located on the side of the isolation valve (9) near the horizontal screw conveyor (5) and connected to the connecting pipe (8). The other end of the return pipe (11) is connected to the powder feeding pipe (10). Both ends of the return pipe (11) are equipped with check valves (12).

8. The reactor with premix structure according to claim 6, characterized in that, The horizontal screw conveyor (5) includes; Feeding shell (502), the feeding shell (502) having the conveying cavity (501); Two spiral feeding augers (504) are arranged symmetrically along the vertical plane of the central axis of the conveying cavity (501), and the water inlet (503) is located on the central axis of the lower wall of the conveying cavity (501).

9. The reactor with premix structure according to claim 8, characterized in that, Also includes: Dust suppression component (13) is disposed on the upper wall of the conveying chamber (501) and is used to spray liquid onto the spiral feeding auger (504).

10. The reactor with premix structure according to claim 9, characterized in that, The dust suppression component (13) has a circumferential nozzle (1301) that is inclined upward toward the upper wall of the conveying chamber (501).

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