Multi-head spiral liquid spraying device

Abstract

The invention provides a multi-head spiral liquid spraying device which comprises an annular main pipe arranged at the bottom of a reaction tank and arranged around the center of a tank body and a plurality of liquid spraying branch pipes arranged in the circumferential direction of the annular main pipe at intervals. At least one liquid inlet is formed in the annular main pipe and is used for uniformly distributing reaction liquid to each liquid spraying branch pipe; the spraying direction of each liquid spraying branch pipe is inclined relative to the radial direction of the main pipe, has a vertical component and a circumferential tangential component at the same time, and is downwards inclined relative to the horizontal plane, so that sprayed liquid forms a wall-attached spiral flowing track in the reaction tank. According to the device, high-disturbance and high-coverage distribution of liquid in a reaction space is realized by optimizing the spraying direction and the spraying pipe arrangement angle, and the device is compact in structure, good in mixing uniformity and high in adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of copper foil surface treatment, and more particularly to a multi-head spiral liquid injection device. BACKGROUND

[0002] In the fine processing and surface treatment process of copper foil material, it is often necessary to place copper wire into a specific reaction tank, introduce sulfuric acid and other reaction media to realize etching or deoxidation treatment on the surface of copper, so as to improve the purity and surface activity of copper material. In order to speed up the reaction process and improve the exchange efficiency between copper wire and reaction liquid, auxiliary disturbance gas is introduced into the liquid to prolong the residence time of the gas bubbles and expand the gas-liquid interface contact area, so as to form more sufficient reaction conditions.

[0003] The existing technology often adopts a single-hole bottom gas injection or top liquid injection method, which has obvious limitations in gas-liquid disturbance path, reaction uniformity and coverage area:

[0004] On the one hand, the traditional gas injection structure is mostly a simple vertical through hole, which cannot form a directional disturbance flow, resulting in uneven distribution of gas in the reaction tank, which reduces the gas-liquid reaction efficiency, especially when the entire circumference or a large area needs to be covered.

[0005] On the other hand, the liquid or gas is injected into the reaction liquid in a straight line, lacking spiral flow disturbance design, making it difficult to achieve long-distance contact between gas and liquid on the spiral path, reducing the mass transfer efficiency and reaction speed.

[0006] In addition, in order to realize larger capacity copper wire treatment or higher reaction efficiency, the existing device lacks adjustability and space coverage optimization in structure design, making it difficult to adapt to different tank sizes or target process requirements.

[0007] Therefore, there is an urgent need for a multi-head liquid injection device with clear injection path, sufficient gas-liquid disturbance and compact and reasonable structure, which can provide stable, uniform and efficient spiral disturbance flow field in the gas-liquid reaction process such as copper wire etching, thereby improving the overall processing quality and mass transfer efficiency. SUMMARY

[0008] The purpose of the present application is to provide a multi-head spiral liquid injection device, which includes a ring-shaped main pipe arranged at the bottom of the reaction tank, and a plurality of liquid injection branch pipes arranged along the circumferential direction thereof; the injection direction of the branch pipes is radially inclined relative to the ring-shaped main pipe and has a circumferential tangential component, which can form a spiral upward disturbance flow field in the tank, thereby realizing efficient contact and reaction between gas and liquid and improving the reaction efficiency and processing uniformity of the target object such as copper wire.

[0009] A multi-head spiral liquid injection device, comprising:

[0010] An annular manifold arranged at the bottom of the reaction tank and closed around the central region of the reaction tank, and a plurality of liquid injection branch pipes arranged along the circumferential direction of the annular manifold;

[0011] At least one gas inlet is arranged on the annular manifold to introduce reaction liquid into the interior of the manifold for distribution and injection by each liquid injection branch pipe.

[0012] The injection direction of the liquid injection branch pipe is arranged obliquely relative to the radial direction of the annular manifold, can be deflected towards or away from the center of the reaction tank, and can be upward injection or downward injection, but at least has a circumferential tangential component to form a spiral flow path in the reaction tank, preferably a spiral upward flow path.

[0013] The annular manifold is arranged at the central region of the bottom of the reaction tank, and its projection on the horizontal plane can be a circular, polygonal or approximately circular polygonal closed structure, and is arranged around the central axis of the reaction tank. When the diameter of the reaction tank is large, a plurality of liquid injection devices can be uniformly arranged circumferentially at the bottom of the reaction tank, or a plurality of gas inlets can be arranged circumferentially on the annular manifold in a single liquid injection device, and each gas inlet is connected to an external liquid supply pipeline through a plurality of liquid inlet pipes to reduce the difference in pressure drop along the pipeline and ensure the consistency of the injection intensity of each liquid injection branch pipe. A plurality of liquid injection branch pipes are uniformly connected along the outer circumferential surface of the annular manifold, and the injection ports can be directed to the upper region above the central axis of the reaction tank and / or the upper region close to the tank wall. By oblique arrangement and the combined action of the circumferential tangential direction, the injected liquid forms a spiral upward flow in the reaction tank, forming a high disturbance and high coverage spray flow field, which is suitable for copper wire etching, gas-liquid reaction and other processes that require large-area uniform contact.

[0014] It should be noted that the "spiral upward flow path" described herein does not refer to the initial direction of the liquid injection, i.e. upward injection, but refers to the overall downward movement trend of the liquid after the gas-liquid mixture is injected from the liquid injection branch pipe at an oblique angle, and the upward movement trend of the gas component under the action of buoyancy, while superimposing the tangential component, thereby forming a spiral trajectory with a combination of circumferential rotation and vertical upward trend in the liquid medium. This trajectory is different from the traditional liquid injection device which only has a one-way jet or an unordered disturbance mode, and can form a high disturbance and high coverage flow effect in the liquid medium. Among them, "high disturbance and high coverage" refers to the spiral flow driving the overall liquid in the reaction tank to form a composite flow field, significantly improving the spatial filling efficiency of the fluid and eliminating local dead zones.

[0015] The traditional liquid spraying device has three major core defects: first, a single nozzle or straight-line branch pipe design is adopted, the spraying path is linear or fan-shaped, there is a blind area in the flow field coverage, the liquid in the local area of the reaction tank cannot form effective disturbance, leading to uneven gas-liquid contact; second, the liquid spraying kinetic energy is insufficient, only weak mixing can be formed in the local area, the gas-liquid residence time is short, and the mass transfer efficiency is low; third, the nozzle structure is fixed, and it cannot be adapted to different specifications of the reaction tank and processing requirements, and the universality is poor, for example, the small-diameter reaction tank is prone to excessive concentration of liquid, and the large-diameter reaction tank has the problem of incomplete coverage.

[0016] In view of the above problems, the application realizes a breakthrough through the architecture of a ring-shaped or polygonal distribution pipeline combined with spiral spraying: first, the ring-shaped main pipe (including a closed main pipe with a horizontal projection in the shape of a circle or a polygon) and the multiple air inlets provided as necessary provide uniform liquid supply for each liquid spraying branch pipe, avoiding the difference in spraying intensity of the branch pipes caused by uneven flow distribution of the traditional ring-shaped main pipe; second, the inclined arrangement and tangential component design of the liquid spraying branch pipe enable the liquid to form a spiral upward trajectory after spraying, drive the overall rotation of the liquid in the reaction tank, form continuous disturbance, and effectively prolong the gas-liquid residence time; finally, the multiple branch pipes are uniformly arranged along the circumference and are configured with specific angle parameters to realize full-tank coverage without dead angles and effectively improve the mass transfer rate compared with the traditional device.

[0017] Compared with the traditional scheme, the key innovations of the application are as follows: first, the spraying direction of the liquid spraying branch pipe includes a vertical component and a circumferential tangential component, and the vertical component can be selected to be upward or downward and the radial component can be selected to be inward or outward according to the working condition, and the spiral flow strengthens the gas-liquid mixing; second, the combination design of the ring-shaped or polygonal closed main pipe and the multiple branch pipes, and multiple air inlets and multiple liquid inlets can be provided under large-diameter working conditions to ensure the uniformity of liquid distribution, and the precise calculation of the angle parameters realizes the optimal adaptation of the flow field and the reaction tank structure; third, the design of the flat nozzle and the adjustable angle mechanism not only expands the coverage area but also improves the universality of the equipment, which can adapt to different diameters and different processing requirements of the reaction scene.

[0018] In one embodiment, the liquid spraying branch pipe includes a nozzle and a branch pipe body, the side of the branch pipe body is provided with the nozzle, the nozzle is a flat nozzle and has a divergent structure to increase the coverage area of the sprayed liquid.

[0019] The nozzle forms a flat nozzle through integral machining or quick-assembly clamping with the branch pipe body, the wide direction of the nozzle is orthogonal to the branch pipe axis, the liquid outlet is distributed in a fan shape, and the divergence angle is 15°-45°, which further expands the liquid surface coverage range while the sprayed liquid rotates upward, improves the action area of the liquid per unit time, and adapts to the full-coverage processing of multiple copper wires or cylindrical targets.

[0020] The technical scheme solves the problems of narrow coverage and small unit time action area of a traditional circular nozzle by combining a flat nozzle with a divergent structure design. The nozzle is integrally processed with the branch pipe body or fastened and connected, the wide direction of the nozzle is arranged orthogonally to the axis of the branch pipe, the liquid outlet is distributed in a fan shape, the divergence angle is 15-45°, the integrally processing mode ensures the connection stability of the nozzle and the branch pipe, and leakage is avoided during high-pressure injection.

[0021] In one of the embodiments, the liquid injection branch pipes are arranged to be downwardly inclined relative to the horizontal plane, so that the gas-containing liquid injected by the branch pipes forms uniformly distributed micro-bubbles in the liquid environment inside the device, the bubbles slowly float in the liquid phase and continuously contact and react with the copper material, thereby enhancing the intensity and uniformity of the gas-liquid reaction and effectively prolonging the reaction residence time.

[0022] In one of the embodiments, the downward inclination angle θ of the liquid injection branch pipes is 0-30°, so that the injected liquid can contact the edge area of the bottom of the reaction tank and form a spiral upward flow along the wall of the reaction tank.

[0023] In the embodiment, the downward inclination angle θ of the liquid injection branch pipes is preferably 10°, the angle can be adjusted to accurately control the path of the liquid after being injected to contact the edge position of the bottom of the reaction tank, so that the injected liquid forms a continuous spiral flow by adhering to the wall and forms directional disturbance, effectively avoiding local dead zones and liquid short-circuiting problems and improving the overall mixing uniformity in the reaction tank.

[0024] The angle limitation has the following core effects: 1. accurate control of the liquid contact position, ensuring that the injected liquid can cover the edge area of the bottom of the reaction tank and eliminate the dead angle at the bottom; 2. strengthening the spiral upward power, the downward impact force generated by the downward inclination angle is converted into upward reaction force after contacting the bottom, which cooperates with the tangential component of the injected liquid to form a stable spiral upward flow; 3. reducing liquid short-circuiting, the continuous spiral flow can avoid the liquid directly rising from the nozzle to the top, prolong the path length and residence time of the liquid in the reaction tank, and improve the reaction efficiency.

[0025] In one of the embodiments, the total nozzle area of the plurality of liquid injection branch pipes is smaller than the cross-sectional area of the gas inlet of the annular main pipe, so as to form a jet pressurization effect and improve the jet kinetic energy.

[0026] In the embodiment, the total liquid outlet area of the liquid injection branch pipes is smaller than 70% of the cross-sectional area of the gas inlet of the annular main pipe, a flow velocity gain area is formed by the nozzle contraction to improve the initial kinetic energy of the injected liquid and enhance the subsequent rotational potential energy, thereby driving the liquid to form a stable spiral flux path, and the liquid motion path is enhanced without increasing the pump pressure.

[0027] The technical scheme realizes pressure boosting and efficiency improvement through area difference design, and breaks through the limitation that the flow and kinetic energy of the traditional liquid spraying device are difficult to be considered. The total liquid outlet area of the liquid spraying branch pipe is less than 70% of the cross-sectional area of the gas inlet of the annular main pipe, and the flow velocity gain area is formed through the nozzle contraction. According to the principle of fluid mechanics, under the same pump pressure, the cross-sectional area reduction can increase the liquid flow velocity by 1.5-2 times, the initial kinetic energy of the jet is significantly enhanced, and the subsequent rotational potential energy is further strengthened.

[0028] In one of the embodiments, the liquid spraying branch pipes are arranged at equal angular intervals along the circumferential direction of the annular main pipe to form a circumferentially uniform distribution structure.

[0029] In the embodiment, the liquid spraying branch pipes are arranged at equal angular intervals with the annular main pipe as the reference center during installation, for example, when 8 branch pipes are arranged, the interval angle between every two branch pipes is 45°, so as to ensure the uniform distribution of the jet direction, which is beneficial to the formation of continuous rotational disturbance of the liquid in the circumferential direction and improves the consistency of the mixed reaction in each region.

[0030] The technical scheme ensures the uniformity of the circumferential jet through the equal angular interval arrangement design, and avoids the flow field imbalance caused by the traditional non-uniform arrangement. The liquid spraying branch pipes are arranged at equal angular intervals with the annular main pipe as the reference center during installation, for example, when 8 branch pipes are arranged, the interval angle between every two branch pipes is 45°, and when 6 branch pipes are arranged, the interval angle is 60°.

[0031] The core value of the equal angular arrangement is that: first, a balanced rotational disturbance field is formed, the jet forces of the branch pipes balance each other in the circumferential direction, the liquid rotation deviation caused by the excessive jet force on one side is avoided, and the stability of the spiral flow field is ensured; second, the regional mixing consistency is improved, the liquid disturbance intensity difference in each region in the reaction tank is controlled within 5% through the uniform distribution of the jet path, and the local over-reaction or insufficient reaction is avoided; third, the parameter calculation is simplified, the jet angle and path of the branch pipes can be designed uniformly through the equal angular arrangement, which is convenient for standardization configuration according to the specifications of the reaction tank, and the design and debugging difficulty is reduced.

[0032] In one of the embodiments, the jet direction of each liquid spraying branch pipe includes an upward component in the vertical direction and a tangential component in the circumferential direction, so as to form a spiral disturbance flow field in the jet area.

[0033] In the embodiment, the upward component in the jet direction of the liquid spraying branch pipe is realized through the adjustment of the pipe bending section, and the tangential component is ensured through the outlet angle setting of the nozzle, and the two components jointly form a stable spiral gas-liquid disturbance flow field in the cylindrical tank body, which is suitable for various industrial occasions such as large-batch liquid reaction, coating and corrosion.

[0034] The technical scheme breaks through the functional limitation of traditional single-direction injection by constructing a spiral disturbance flow field through double-component cooperative design. The upward component is realized by adjusting the curved section of the pipeline, so that the liquid has an upward movement trend when being injected; the tangential component is ensured by setting the outlet angle of the nozzle, so that the liquid has a rotation trend in the circumferential direction at the same time, and the two components form a spiral trajectory.

[0035] The core role of double-component cooperation is: first, to strengthen the flow field disturbance. The spiral flow can drive the liquid in the reaction tank to form a three-dimensional disturbance, rather than the traditional two-dimensional flow, the disturbance intensity is improved, and the gas-liquid contact area is significantly increased; second, to adapt to various industrial scenes. The stable spiral gas-liquid disturbance flow field can meet the needs of mass liquid reaction, coating, corrosion, etc. For example, in the copper wire etching scene, the spiral flow can ensure that multiple copper wires are in full contact with the etching liquid, and the etching uniformity is improved; third, to improve the mass transfer rate. The spiral trajectory prolongs the liquid path, the gas-liquid contact time is prolonged, the mass transfer rate is improved, and the reaction efficiency is significantly improved.

[0036] In one embodiment, the number of liquid injection branch pipes is multiple, preferably not less than 3, such as 4, 6, 8, 12, 16, 24, etc. Among them, the number of liquid injection branch pipes is adjusted according to the actual size of the reaction tank and the liquid coverage requirement. When the tank diameter is small, 4 or 6 liquid injection branch pipes can be used to achieve good coverage, and if the tank is a large-capacity reactor, the number of liquid injection branch pipes can be expanded to 12, 16, 24 or even more to strengthen the circumferential disturbance effect.

[0037] In one embodiment, the opening width of the flat nozzle is 4mm-12mm, and the opening length is 15mm-50mm, used to form a wide strip-shaped liquid beam.

[0038] Among them, the nozzle is a rectangular liquid outlet, the width range is 4mm-12mm, and the length range is 15mm-50mm, forming a transversely expanded strip-shaped liquid beam, significantly improving the spraying coverage width; the opening degree of the flat mouth can be quickly adjusted by replacing the nozzle component to adapt to different flow rates and spraying needs.

[0039] In one embodiment, the downward inclination angle θ of the liquid injection branch pipe relative to the horizontal plane and the liquid injection action range parameter satisfy the following relationship:

[0040]

[0041] Among them, H is the vertical distance from the nozzle outlet to the bottom of the reaction tank, and L is the horizontal propagation distance of the injected liquid in the reaction tank.

[0042] The liquid injection branch pipe injection direction has a downward component and a tangential velocity component along the wall of the reaction tank, which is used to form a spiral upward flow field in the liquid medium to prolong the gas-liquid contact path and improve the chemical reaction efficiency.

[0043] For large-diameter reaction tanks, when the coverage of a single spray device is insufficient, multiple spray devices can be arranged circumferentially in the reaction tank to achieve uniform spraying and reaction in the entire area; or a ring-shaped manifold structure with a horizontal projection in the shape of a polygon or a circle is used in a single spray device, and multiple gas inlets are provided on the ring-shaped manifold, each gas inlet being connected to a plurality of liquid inlet pipes, so that a polygonal or circular liquid supply circuit is formed by combination in structure, further ensuring the consistency of the spraying intensity of each spray branch pipe under large-diameter working conditions.

[0044] Compared with the prior art, the present application has the following beneficial effects:

[0045] Firstly, by constructing a spiral disturbance upflow field, the reaction efficiency of copper wire and gas is significantly improved. The spray branch pipe is arranged downwardly relative to the horizontal plane, and the spraying direction has both a tangential component and a downward component. The gas-liquid mixture sprayed forms a spiral upward trajectory in the reaction tank under the superimposed action of buoyancy and the tangential component. This composite flow field enhances the disturbance intensity and reaction interface update frequency in the copper wire winding area, avoids the problems of reaction material retention and dead angle distribution, and thus improves the contact frequency and reaction uniformity of gas and copper wire.

[0046] Secondly, the divergent nozzle structure and the control of the downward inclination angle of the branch pipe are used to optimize the gas-liquid distribution path and the micro-bubble generation behavior. The nozzle is provided in the form of a divergent fan structure, and the spray branch pipe is arranged at a downward inclination angle of 0° to 30°. The jet flow can trigger strong disturbance in the initial stage, promote the formation of micro-bubbles, and prolong the upward floating path of the micro-bubbles in the liquid phase. The disturbance enhances the fluid adhesion, causes the gas to form a spiral upward distribution trajectory along the tank wall, and thus effectively overcomes the problems of insufficient reaction and uneven reaction in local areas.

[0047] Thirdly, a high kinetic energy uniform jet flow system is constructed based on the inlet and outlet area ratio and the inclination angle arrangement strategy. The total nozzle area of the spray branch pipe is smaller than the cross-sectional area of the gas inlet of the ring-shaped manifold, so that pressurized output is achieved and the kinetic energy of the liquid flow is improved. By designing the jet inclination angle to satisfy the relationship tan(θ) = H / L, the gas-liquid jet flow can form a balanced and expanded spatial distribution trajectory in the reaction tank, improve the mixing uniformity, adapt to the multi-point reaction requirement of complex copper wire structures, and realize fine regulation and control of the reaction system. BRIEF DESCRIPTION OF DRAWINGS

[0048] Fig. 1 Fig. 1 is a structural schematic diagram of a multi-head spiral spray device according to the present application.

[0049] Fig. 2 Fig. 2 is a top view of the multi-head spiral spray device according to the present application.

[0050] The following specific embodiments will further illustrate the present application in conjunction with the above drawings.

[0051] Explanation of main element symbols

[0052] Reaction tank 10;

[0053] Annular manifold 20; gas inlet 21;

[0054] Liquid injection branch pipe 30; injection port 31; branch pipe body 32. DETAILED DESCRIPTION

[0055] Embodiment:

[0056] In the process flow of copper wire etching or copper foil surface treatment, etc. involving gas-liquid reaction, it is often necessary to assist the liquid to fully contact with the reaction gas flow to achieve efficient mass transfer and uniform reaction. However, the traditional liquid injection device mostly adopts vertical or radial injection structure, and the liquid coverage range is limited, and the disturbance ability is insufficient. Especially when the reaction tank body structure is large or the reactant is a bundle-shaped target, local dead angle, low gas-liquid exchange efficiency, incomplete reaction and other problems are prone to occur, which restricts the overall production capacity and product consistency.

[0057] The applicant realizes that if a liquid injection mechanism forming a spiral upward path in space can be constructed, not only the uniformity of liquid distribution can be improved, but also the residence time of gas bubbles in the liquid can be prolonged, the disturbance and exchange ability can be enhanced, so that the reaction environment in the reaction tank can be significantly improved. Therefore, the present application proposes a multi-head spiral liquid injection device, which is provided with an annular manifold at the bottom of the reaction tank, and a plurality of upward inclined liquid injection branch pipes with tangential component are connected in equal angle interval, so that the injected liquid forms a spiral upward flow channel along the tank wall, and a continuous rotating disturbance flow field is formed in space.

[0058] Therefore, as Figs. 1-2 shown, a multi-head spiral liquid injection device,

[0059] A multi-head spiral liquid injection device comprises:

[0060] An annular manifold 20 provided at the bottom of the reaction tank 10, and a plurality of liquid injection branch pipes 30 arranged along the circumferential direction of the annular manifold 20;

[0061] At least one gas inlet 21 is provided on the annular manifold 20 for introducing the reaction medium into the manifold, and each liquid injection branch pipe 30 is provided with an injection port 31; the annular manifold 20 is arranged around the center axis of the reaction tank 10, and its projection on the horizontal plane can be circular, polygonal or approximately circular polygonal structure, and a plurality of liquid injection branch pipes 30 are arranged in equal angle interval or substantially equal angle interval along the circumferential direction of the annular manifold 20, so as to be uniformly distributed around the center in space;

[0062] The spray direction of the spray branch pipe 30 is obliquely arranged relative to the radial direction of the annular main pipe 20, can be deflected towards the center of the reaction tank 10 or away from the center of the reaction tank 10, and can have an upward or downward axial component, but at least has a circumferential tangential component, so that the sprayed medium forms a flow trajectory moving along a spatial spiral path in the reaction tank 10, and preferably a spiral upward flow path.

[0063] The annular main pipe 20 is arranged at the center area of the bottom of the reaction tank 10 to enclose an annular structure, and a plurality of spray branch pipes 30 are uniformly connected to the outer peripheral surface of the annular main pipe 20, and the spray nozzles 31 thereof can be directed to the upper area of the central axis of the reaction tank 10 or to the upper or middle area close to the tank wall. Through the combined action of the radial component, the axial component and the circumferential tangential component in the spray direction, the sprayed medium forms a spiral turbulent flow in the reaction tank 10, forming a high disturbance and high coverage spray flow field, which is suitable for copper wire etching, gas-liquid reaction and other processes that require large-area uniform contact.

[0064] Compared with the prior art, the conventional liquid spraying device mainly uses vertical or radial spraying, and it is difficult to form a self-driven rotating disturbance path of the fluid, and the liquid distribution is easy to concentrate in the central area, and the reaction coverage range is limited. In the present application, the spray direction of the spray branch pipe 30 is obliquely arranged relative to the radial direction and has a circumferential tangential component, so that the sprayed liquid naturally forms a spiral upward flow path in the tank body, effectively improving the coverage and exchange efficiency of the liquid and the target.

[0065] In one embodiment, the spray branch pipe 30 includes a spray nozzle 31 and a branch pipe body 32, the side of the branch pipe body 32 is provided with the spray nozzle 31, the spray nozzle 31 is a flat spray nozzle 31 and has a diverging structure to increase the coverage area of the sprayed liquid.

[0066] The spray nozzle 31 is formed by integral machining or quick clamping with the branch pipe body 32, the wide direction of the flat spray nozzle 31 is orthogonal to the axis of the branch pipe body 32, the liquid outlet is distributed in a fan shape, the divergence angle is 15°-45°, and the liquid surface coverage range is further expanded while the sprayed liquid rotates and rises, the action area of the liquid per unit time is improved, and the full-coverage treatment of multiple copper wires or cylindrical targets is adapted.

[0067] Compared with the prior art, the conventional nozzle is mainly point spraying or small round port structure, the liquid beam is concentrated, the coverage range is small, and the pressure needs to be increased or the spray nozzles 31 need to be arranged densely to compensate for the blind area. In the present application, the diverging flat spray nozzle 31 is designed, the fan-shaped liquid beam expansion structure is used to expand the spray coverage angle, a wider action area is realized under unit liquid volume, and it is particularly suitable for synchronous coverage treatment of copper wire winding or bundle-shaped target.

[0068] In one embodiment, the liquid injection branch pipes 30 are all inclined downward relative to the horizontal plane, so that the gas-containing liquid sprayed forms uniformly distributed micro-bubbles in the liquid environment inside the device, the micro-bubbles slowly float upwards in the liquid phase and continuously react with the copper material immersed therein, thereby enhancing the intensity and uniformity of the gas-liquid reaction and effectively prolonging the reaction residence time.

[0069] Compared with the prior art, the conventional spraying is mainly flat or upward spraying, which cannot effectively stimulate liquid surface disturbance and bubble generation, limiting the dissolution efficiency of gas in liquid. The present application sets the liquid injection branch pipes 30 to be inclined downward as a whole, so that the gas-containing liquid sprayed forms a large number of uniformly distributed micro-bubbles in the liquid environment inside the device, the micro-bubbles slowly float upwards in the liquid phase and continuously react with the copper material immersed therein, thereby significantly improving the intensity and uniformity of the gas-liquid reaction and further prolonging the reaction residence time, which is suitable for high-efficiency exchange scenarios aiming at the coexistence of gas-liquid-solid three phases.

[0070] In one embodiment, the inclination angle θ of the liquid injection branch pipes 30 is 0°-30°, so that the sprayed medium can contact the edge area of the bottom of the reaction tank 10 and form a spiral upward flow along the wall of the reaction tank 10.

[0071] Preferably, the inclination angle θ of the liquid injection branch pipes 30 is 10°, and the path of the sprayed medium contacting the edge of the bottom of the reaction tank 10 after being sprayed can be accurately controlled by adjusting the angle, so that the sprayed medium rises along the wall to form a continuous spiral flow, forming a directional disturbance, effectively avoiding local dead zones and medium short circuit problems, and improving the overall mixing uniformity in the reaction tank 10.

[0072] Compared with the prior art, the existing scheme generally ignores the correlation between the spraying angle and the spatial path, resulting in that the medium jet flow cannot effectively run along the wall, and the mixing uniformity is limited. The present application sets the inclination angle θ of the liquid injection branch pipes 30 to be 0°-30° and preferably 10°, so that the sprayed medium can rise along the wall from the edge of the bottom of the reaction tank 10, build a spiral continuous disturbance track, effectively break the dead angle area and balance the stirring flow field, and improve the reaction consistency in the large-volume container.

[0073] In one embodiment, the total nozzle area of the plurality of liquid injection branch pipes 30 is less than the cross-sectional area of the gas inlet 21 of the annular main pipe 20, so as to form a jet pressurization effect and improve the jet kinetic energy.

[0074] Preferably, the total nozzle area of the plurality of liquid injection branch pipes 30 is less than 70% of the cross-sectional area of the gas inlet 21 of the annular main pipe 20, a flow velocity gain area is formed by the nozzle 31 contraction, the initial kinetic energy of the sprayed liquid is improved, and the subsequent rotational potential energy is enhanced, thereby driving the liquid to form a stable spiral flux path, realizing the enhancement of the liquid motion path without increasing the pump pressure.

[0075] Compared with the prior art, the existing liquid spraying system is commonly in a straight-through form in structural design, lacks kinetic energy focusing mechanism, and thus causes low initial velocity and weak liquid dispersion. The total nozzle area of the plurality of liquid spraying branches 30 is controlled to be smaller than the cross-sectional area of the gas inlet 21 of the annular main pipe 20, so that a local pressurization and kinetic energy enhancement zone is formed for the sprayed liquid flow, and the spraying impact force and subsequent rotational potential energy are improved without increasing the liquid supply pressure.

[0076] In one of the embodiments, the liquid spraying branches 30 are arranged at equal angular intervals along the circumferential direction of the annular main pipe 20 to form a circumferentially uniform distribution structure.

[0077] In one of the embodiments, the liquid spraying branches 30 are arranged at equal angular intervals along the circumferential direction of the annular main pipe 20 to form a circumferentially uniform distribution structure.

[0078] Compared with the prior art, the conventional pipe arrangement often has problems of uneven spacing or poor symmetry, which easily causes unbalanced circumferential disturbance, liquid accumulation or short circuit in some areas. The liquid spraying branches 30 are arranged at equal angular intervals in the present application to ensure the uniformity of the circumferential disturbance, so that the liquid rotational flow in the reaction tank 10 is more stable and continuous, and the reaction coverage effect is significantly enhanced.

[0079] In one of the embodiments, the spraying direction of each liquid spraying branch 30 includes an upward component in the vertical direction and a tangential component in the circumferential direction to form a spiral disturbance flow field in the spraying area.

[0080] In one of the embodiments, the upward component in the spraying direction of the liquid spraying branch 30 is realized by adjusting the pipe bending section, and the tangential component is ensured by setting the outlet angle of the nozzle 31. The two components work together to form a stable spiral gas-liquid disturbance flow field in the cylindrical tank, which is suitable for large-scale liquid reactions, coating, corrosion and other industrial applications.

[0081] Compared with the prior art, most liquid spraying structures do not establish a comprehensive direction control mechanism for three-dimensional flow fields, and the spraying flux is limited to two-dimensional surfaces. The present application forms a three-dimensional rotational disturbance flow field by simultaneously setting the upward direction and the circumferential tangential component, further enhancing the wrapping and disturbance intensity of the fluid on the target surface.

[0082] In one of the embodiments, the number of liquid spraying branches 30 is a plurality, preferably not less than 3, such as 4, 6, 8, 12, 16, 24, etc.

[0083] The number of the liquid injection branch pipes 30 is adjusted according to the size of the actual reaction tank 10 and the medium coverage requirement: when the diameter of the reaction tank 10 is small, 4 or 6 liquid injection branch pipes 30 can be selected to achieve good coverage, and if the reaction tank 10 is a large-capacity reactor, the number of liquid injection branch pipes 30 can be expanded to 12, 16, 24 or even more to strengthen the circumferential disturbance effect.

[0084] In one embodiment, the opening width of the flat nozzle 31 is 4-12 mm, and the opening length is 15-50 mm, for forming a wide strip-shaped liquid beam.

[0085] The nozzle 31 is a rectangular liquid outlet, with a width of 4-12 mm and a length of 15-50 mm, forming a transversely expanded strip-shaped liquid beam, significantly improving the spraying coverage width; the opening degree of the flat nozzle can be quickly adjusted by replacing the nozzle component, adapting to different flow rates and spraying requirements.

[0086] In one embodiment, the downward inclination angle θ of the liquid injection branch pipe 30 relative to the horizontal plane and the liquid injection range parameter satisfy the following relationship:

[0087]

[0088] Where H is the vertical distance from the outlet of the nozzle 31 to the bottom of the reaction tank 10, and L is the horizontal propagation distance of the injected liquid in the reaction tank 10.

[0089] The injection direction of the liquid injection branch pipe 30 has a downward component and a tangential velocity component along the wall of the reaction tank 10, for forming a spiral upward flow field in the liquid medium, to prolong the gas-liquid contact path and improve the chemical reaction efficiency.

[0090] For large-diameter reaction tanks 10, when the coverage range of a single liquid injection device is insufficient, multiple liquid injection devices can be arranged circumferentially in the reaction tank 10 to achieve uniform injection and reaction in the entire area; or in a single device, the annular main pipe 20 is designed as a large-diameter closed flow channel, and at least two gas inlets 21 are provided on the annular main pipe 20, each gas inlet 21 being connected to a liquid supply source through an independent liquid inlet pipe, to reduce the difference in pressure drop along the way, balance the feed pressure of each liquid injection branch pipe 30, and thus ensure the consistency of the injection intensity of each liquid injection branch pipe 30 under large-diameter working conditions.

[0091] Compared with the prior art, the traditional spray path design is mostly empirical or trial-and-error adjustment, lacks theoretical support, and the path is unstable; at the same time, a single circular main pipe and a single-point liquid inlet mode are mostly used, and under the condition of large diameter and large flow, problems such as uneven pressure drop and inconsistent jetting intensity are prone to occur. The application introduces a parameter formula based on structural size on the one hand, accurately calculates the downward angle and distribution angle through a mathematical model, ensures that the medium jet adheres to the wall to start and rotate uniformly, and constructs an optimal spiral disturbance flow field; on the other hand, by designing the annular main pipe 20 as a circular or polygonal closed flow channel, and setting multiple liquid inlet pipes and multiple gas inlets 21 under the condition of large diameter, the segmented balance of the supply of each liquid spray branch pipe 30 is realized, thereby forming a gas-liquid reaction environment with high mass transfer efficiency and uniform jetting intensity.

[0092] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A multi-head spiral liquid jet device, characterized by, The application relates to a reaction tank liquid injection device. The application comprises: a ring-shaped main pipe (20) arranged at the bottom of a reaction tank (10) and closed around the central area of the reaction tank (10), and a plurality of liquid injection branch pipes (30) arranged along the circumferential direction of the ring-shaped main pipe (20); at least one gas inlet (21) is arranged on the ring-shaped main pipe (20) and used for guiding reaction liquid into the inside of the main pipe for being sprayed by the liquid injection branch pipes (30); 2. The multi-head spiral liquid spray device of claim 1, wherein: the spraying direction of the liquid injection branch pipes (30) is arranged to be inclined relative to the radial direction of the ring-shaped main pipe (20) and has a circumferential tangential component and a vertical component, so that the sprayed liquid forms a spiral flow path in the reaction tank (10).

3. The multi-head spiral liquid spray device of claim 1, wherein: The liquid injection branch pipe (30) comprises a nozzle (31) and a branch pipe body (32), the side of the branch pipe body (32) is provided with the nozzle (31), the nozzle (31) is a flat nozzle (31) and has a diverging structure.

4. The multi-head spiral liquid spray device of claim 1, wherein: Each liquid injection branch pipe (30) is arranged to be inclined downward relative to the horizontal plane.

5. The multi-head spiral liquid spray device of claim 1, wherein: The inclination angle theta (theta) of each liquid injection branch pipe (30) is 0-30 degrees, so that the sprayed liquid can contact the edge area of the bottom of the reaction tank (10) and form a spiral upward flow along the wall of the reaction tank (10).

6. The multi-head spiral liquid spray device of claim 1, wherein: The total nozzle area of the plurality of liquid injection branch pipes (30) is smaller than the cross-sectional area of the gas inlet (21) of the ring-shaped main pipe (20).

7. The multi-head spiral liquid spray device of claim 1, wherein: The liquid injection branch pipes (30) are arranged at equal angular intervals along the circumferential direction of the ring-shaped main pipe (20) and form a circumferentially uniform distribution structure.

8. The multi-head spiral liquid spray device of claim 1, wherein: The spraying direction of each liquid injection branch pipe (30) comprises a vertical component and a tangential component in the circumferential direction, so as to form a spiral disturbance flow field in the spraying area.

9. The multi-head spiral liquid spray device of claim 1, wherein: The number of the liquid injection branch pipes (30) is more than three.

10. The multi-head spiral liquid spray device of claim 1, wherein: The opening width of the flat nozzle (31) is 4-12 mm, and the opening length is 15-50 mm, so as to form a wide strip-shaped liquid beam. The inclination angle theta (theta) of the liquid injection branch pipe (30) relative to the horizontal plane and the liquid injection action range parameter satisfy the following relationship: wherein H is the vertical distance from the outlet of the nozzle (31) to the bottom of the reaction tank (10), and L is the horizontal propagation distance of the sprayed liquid in the reaction tank (10).

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