Atomizing nozzle, spray dryer and production equipment of powder for battery

Abstract

The utility model discloses an atomizing nozzle, a spray dryer and production equipment of powder for batteries, and the atomizing nozzle comprises a first gas hole channel which comprises a first gas output part located on the end face of the atomizing nozzle; the gas guide component comprises a gas inlet part communicated with the first gas output part and a gas exhaust part arranged in the circumferential direction of the first gas output part and communicated with the gas inlet part, and the gas exhaust part is configured to output gas at multiple angles in the circumferential direction of the first gas output part along the end face; the liquid hole channel is arranged in the cross section perpendicular to the first gas hole channel in the circumferential direction of the first gas hole channel, the liquid hole channel comprises a liquid output part which is arranged on the end face and arranged in the circumferential direction of the gas guiding component, and the direction of the liquid output part intersects with the direction of the exhaust part; and the second gas hole channel is arranged in the cross section in the circumferential direction of the liquid hole channel, the second gas hole channel comprises a second gas output part arranged on the end face, and the orientation of the second gas output part intersects with the orientation of the exhaust part.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an atomizing nozzle, a spray dryer and production equipment of powder for batteries. Background Art

[0002] In the production process of batteries, binders are needed. In the process of making binders, multiple powders need to be mixed in a solvent, and then the slurry consisting of the powders and the solvent is dried. When the slurry is dried with a spray dryer, the nozzle of a general spray dryer has a poor atomization effect on the above slurry. Utility Model Content

[0003] The utility model aims to provide an atomizing nozzle, a spray dryer and a production device for powder material for a battery, so as to improve the problem of poor atomizing effect of the nozzle in the related technology.

[0004] According to one aspect of the present application, an atomizing nozzle is provided, which comprises: a first gas channel, comprising a first gas output portion located on the end face of the atomizing nozzle; a gas guiding component, comprising an inlet portion connected to the first gas output portion and an exhaust portion arranged along the circumference of the first gas output portion and communicating with the inlet portion, the exhaust portion being configured to output gas at multiple angles along the end face in the circumferential direction of the first gas output portion; a liquid channel, arranged along the circumference of the first gas channel in a cross section perpendicular to the first gas channel, the liquid channel comprising a liquid output portion provided on the end face and arranged along the circumference of the gas guiding component, the direction of the liquid output portion intersecting with the direction of the exhaust portion; and a second gas channel, arranged along the circumference of the liquid channel in the cross section, the second gas channel comprising a second gas output portion provided on the end face, the direction of the second gas output portion intersecting with the direction of the exhaust portion.

[0005] In some embodiments, the exhaust portion includes a plurality of exhaust ports arranged along a circumference of the first gas output portion.

[0006] In some embodiments, the gas guide component includes a tubular component whose one end is connected to the first gas output portion and a blocking component that blocks one end of the tubular component away from the first gas output portion, and the exhaust port is provided on the circumferential surface of the tubular component.

[0007] In some embodiments, a threaded structure for connecting the first gas output portion is provided adjacent to the first gas output portion of the cylindrical component.

[0008] In some embodiments, the direction of the exhaust port is consistent with the radial direction of the first gas output portion; or, the directions of the multiple exhaust ports are inclined in the same direction relative to the radial direction of the first gas output portion, so that the gases output by the multiple exhaust ports form a first rotating airflow rotating in the circumferential direction of the first gas output portion; or, a guide component is provided in the second gas duct to cause the second gas output portion to output a rotating airflow, so that the gas output by the second gas output portion forms a second rotating airflow rotating in the circumferential direction of the first gas output portion.

[0009] In some embodiments, the inclination direction of the exhaust port is configured to cause the first rotating airflow to rotate in a first direction around the first gas output portion, and the guide component is configured to cause the second rotating airflow to rotate in a second direction around the first gas output portion, and the first direction is opposite to the second direction.

[0010] In some embodiments, the direction of the liquid output portion is inclined toward the gas guide member relative to a direction perpendicular to the end surface.

[0011] In some embodiments, the liquid output portion includes a plurality of liquid discharge holes arranged along the circumference of the gas guide component.

[0012] In some embodiments, the liquid channel includes a first liquid channel section adjacent to and in communication with the liquid output portion, and the first liquid channel section gradually inclines toward the first gas channel in a direction approaching the liquid output portion.

[0013] In some embodiments, the exhaust portion is oriented parallel to the end surface; and / or the second gas output portion is oriented perpendicular to the end surface; and / or the second gas output portion is oriented perpendicular to the exhaust portion.

[0014] In some embodiments, the atomizing nozzle also includes: a nozzle body, one end of which is provided with an end face having a first gas output portion and a liquid output portion, and the first gas channel and the liquid channel extend from the end face to the other end of the nozzle body; and an annular cover, which is sleeved outside the nozzle body and spaced apart from the outer circumferential surface of the nozzle body to form a second gas channel.

[0015] In some embodiments, the atomizing nozzle includes at least two gas guide components, and one of the at least two gas guide components is replaceably mounted on the first gas output portion.

[0016] According to another aspect of the present application, a spray dryer is also provided, and the spray dryer includes the above-mentioned atomizing nozzle.

[0017] In some embodiments, the spray dryer further comprises a first gas pipeline for delivering gas to the first gas channel, a second gas pipeline for delivering gas to the second gas channel, a first regulating valve disposed in the first gas pipeline, and a second regulating valve disposed in the second gas pipeline.

[0018] According to another aspect of the present application, a production device for battery powder is also provided, and the production device for battery powder includes the above-mentioned spray dryer.

[0019] By applying the technical solution of the present application, the slurry composed of the powder and the solvent is sprayed out through the liquid output part and forms a primary atomization; the slurry after the primary atomization is impacted by the gas output from the exhaust part and flowing along the end surface of the atomizing nozzle to perform a secondary atomization; the slurry after the secondary atomization is impacted by the gas output from the second gas output part to perform a tertiary atomization. It can be seen that the atomizing nozzle of this embodiment can perform multiple atomizations on the above-mentioned slurry, which is conducive to improving the atomization effect.

[0020] Furthermore, the liquid output portion is arranged along the circumference of the gas guide component, the above-mentioned slurry is output in a dispersed manner along the circumference of the gas guide component, the exhaust portion outputs at multiple angles along the circumference and the gas flowing along the above-mentioned end surface respectively impacts the slurry output by the liquid output portion, and the dispersedly output slurry is impacted at multiple angles in the circumference by the gas output by the exhaust portion of the gas guide component, which is beneficial to disperse and atomize the above-mentioned slurry, thereby improving the atomization efficiency.

[0021] Furthermore, the airflow outputted from the exhaust section and the airflow outputted from the second gas output section intersect, and by changing the flow rate or pressure of one or both of the gases in the exhaust section and the second gas output section, the direction of the airflow after the two airflows meet can be changed, thereby obtaining different atomization angles. In this embodiment, the atomization angle can be adjusted within 0 to 180 degrees. Different atomization angles are matched according to different spray dryer sizes, thereby improving the flexibility of the layout of multiple atomizers and achieving the best drying effect.

[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic structural diagram of an electric device disclosed in some embodiments of the present application is shown.

[0025] Figure 2 A schematic diagram of the exploded structure of a battery pack disclosed in some embodiments of the present application is shown.

[0026] Figure 3 A schematic structural diagram of a battery cell disclosed in some embodiments of the present application is shown.

[0027] Figure 4 A schematic diagram of the three-dimensional structure of an atomizing nozzle disclosed in some embodiments of the present application is shown.

[0028] Figure 5 A schematic side view of the structure of an atomizing nozzle disclosed in some embodiments of the present application is shown.

[0029] Figure 6 A schematic diagram of the main structure of an atomizing nozzle disclosed in some embodiments of the present application is shown.

[0030] Figure 7 Shows Figure 6 Schematic diagram of the cross-sectional structure at AA in the middle.

[0031] Figure 8 A schematic diagram of the top view of the structure of an atomizing nozzle disclosed in some embodiments of the present application is shown.

[0032] Fig. 9 A schematic structural diagram of a gas guide component of an atomizing nozzle disclosed in some embodiments of the present application is shown.

[0033] Fig.10 Shows Fig. 9 Schematic diagram of the cross-sectional structure at BB in the middle.

[0034] Fig.11 A schematic cross-sectional structure diagram of a gas guide component of an atomizing nozzle disclosed in some other embodiments of the present application is shown.

[0035] Fig.12 A schematic structural diagram of a gas guide component of an atomizing nozzle disclosed in some embodiments of the present application is shown.

[0036] Fig.13 A schematic structural diagram of a gas guide component of another atomizing nozzle disclosed in some embodiments of the present application is shown.

[0037] Fig.14 A schematic diagram of a fluid system of a spray dryer disclosed in some embodiments of the present application is shown.

[0038] In the figure: 1000, vehicle; 100, battery pack; 110, box; 111, first part; 112, second part; 120, battery cell; 121, end cover; 121a, electrode terminal; 122, shell; 123, battery cell assembly; 123a, pole ear; 200, controller; 300, motor; 1, first gas channel; 11, first gas output part; 2. Gas guide component; 21. Air inlet; 22. Air exhaust; 23. Cylindrical component; 24. Sealing component; 25. Threaded structure; 3. Liquid channel; 31. Liquid output; 32. Second liquid channel section; 33. First liquid channel section; 4. Second gas channel; 41. Second gas output; 42. Air inlet; 43. Second gas channel section; 44. First gas channel section; 5. Nozzle body; 6. Annular cover; 7. Connector; 81. First gas pipeline; 82. Second gas pipeline; 83. Liquid pipeline; 91. First regulating valve; 92. Second regulating valve; 93. Third regulating valve. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0040] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0041] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] Further, " scope " disclosed in the present application is limited in the form of lower limit and upper limit, and given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of special range. The scope limited in this way can be including end value or not including end value, and can be combined arbitrarily, that is, any lower limit can form a scope with any upper limit combination. For example, if the scope of 60-120 and 80-110 is listed for a particular parameter, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range value 1 and 2 listed, and if the maximum range value 3,4 and 5 are listed, the following scope can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present application, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0043] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0044] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0045] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0046] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0047] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0048] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0049] Figure 1 FIG. 1 shows a schematic diagram of a structure of an electric device using a battery as a power source; Figure 1 As shown, the power-consuming device of this embodiment includes a vehicle 1000, which may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery pack 100 is disposed inside the vehicle 1000, and the battery pack 100 may be disposed at the bottom, head, or tail of the vehicle 1000. The battery pack 100 may be used to power the vehicle 1000, for example, the battery pack 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery pack 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0050] In some embodiments of the present application, the battery pack 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0051] Please refer to Figure 2 , Figure 2 An exploded view of a battery pack 100 provided for some embodiments of the present application. The battery pack 100 includes a case 110 and a battery module disposed in the case 110, the battery module includes a plurality of battery cells 120, and the battery cells 120 are accommodated in the case 110. Among them, the case 110 is used to provide a storage space for the battery cells 120, and the case 110 can adopt a variety of structures. In some embodiments, the case 110 may include a first portion 111 and a second portion 112, the first portion 111 and the second portion 112 cover each other, and the first portion 111 and the second portion 112 jointly define a storage space for accommodating the battery cells 120. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 may be in various shapes, such as a cylinder, a cuboid, etc.

[0052] In the battery pack 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the box 110; of course, the battery pack 100 may also be a battery module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 110. The battery pack 100 may also include other structures, for example, the battery pack 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0053] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0054] Please refer to Figure 3 , Figure 3The schematic diagram of the decomposition structure of the battery cell 120 provided in some embodiments of the present application. The battery cell 120 refers to the smallest unit constituting the battery pack 100. Figure 3 The battery cell 120 includes an end cover 121, a shell 122, a battery cell assembly 123 and other functional components.

[0055] The end cap 121 refers to a component that covers the opening of the shell 122 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 121 can be adapted to the shape of the shell 122 to match the shell 122. Optionally, the end cap 121 can be made of a material with a certain hardness and strength, such as an aluminum alloy, so that the end cap 121 is not easily deformed when squeezed and collided, so that the battery cell 120 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 121a can be provided on the end cap 121. The electrode terminal 121a can be used to electrically connect to the battery cell assembly 123 for outputting or inputting electrical energy of the battery cell 120. In some embodiments, the end cap 121 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold. The material of the end cap 121 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the present embodiment. In some embodiments, an insulating member can be provided on the inner side of the end cap 121, and the insulating member can be used to isolate the electrical connection components in the housing 122 from the end cap 121 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0056] The shell 122 is a component used to cooperate with the end cap 121 to form the internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the battery cell assembly 123, electrolyte and other components. The shell 122 and the end cap 121 can be independent components, and an opening can be set on the shell 122, and the internal environment of the battery cell 120 is formed by covering the opening with the end cap 121 at the opening. Without limitation, the end cap 121 and the shell 122 can also be integrated. Specifically, the end cap 121 and the shell 122 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 122, the end cap 121 covers the shell 122. The shell 122 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 122 can be determined according to the specific shape and size of the battery cell assembly 123. The shell 122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special limitation on this.

[0057] The cell assembly 123 is a component where electrochemical reactions occur in the battery cell 120. The housing 122 may contain one or more cell assemblies 123. The cell assembly 123 is mainly formed by winding or stacking pole sheets, wherein the pole sheets include a positive pole sheet and a negative pole sheet, and a separator is usually provided between the positive pole sheet and the negative pole sheet.

[0058] The electrode sheet mainly includes a thin sheet-shaped current collector and an active material coated on the current collector. The parts of the positive electrode sheet, cathode electrode sheet and the negative electrode sheet, anode electrode sheet with active materials constitute the main body of the battery cell assembly, and the parts of the positive electrode sheet and negative electrode sheet without active materials each constitute a tab 123a. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery pack 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 123a connects the electrode terminal to form a current loop.

[0059] The two sides of the isolation membrane are connected to the positive electrode sheet and the negative electrode sheet respectively through the isolation membrane adhesive. The battery isolation membrane is coated with adhesive mainly to better bond the active material to the isolation membrane to ensure that the active material will not fall off or shift during the charge and discharge process of the battery.

[0060] The separator adhesive is mainly composed of a mixture of powder and solvent. The smaller the thickness of the separator adhesive layer between the pole piece and the separator, the smaller the volume of the corresponding battery cell assembly, which is conducive to miniaturization of the battery and improving the energy density of the battery.

[0061] The inventors have found that reducing the particle size of the powder of the isolation film adhesive can reduce the thickness of the isolation film adhesive layer while ensuring the bonding effect. In the production process of the above-mentioned powder, it is necessary to mix multiple powders in a solvent, and then use a spray dryer to dry the mixed slurry. The spray dryer includes a container, a hot air pipeline that transports high-temperature hot air into the container, and an atomizing nozzle that transports the slurry to be dried into the container. The slurry is atomized by the atomizing nozzle and then transported to the dryer. The solvent in the slurry evaporates rapidly after contacting the high-temperature hot air, and can become a dry powder in a relatively short time.

[0062] The above-mentioned solvent has a relatively high viscosity, and the nozzle of a general spray dryer has a poor atomization effect on the above-mentioned slurry, thereby affecting the corresponding drying effect.

[0063] In order to improve the above problems, this embodiment provides an atomizing nozzle, see the attached Figures 4 to 8 The atomizing nozzle includes a first gas channel 1, a gas guide component 2, a liquid channel 3 and a second gas channel 4.

[0064] The first gas channel 1 includes a first gas output portion 11 located on the end surface of the atomizing nozzle. The gas guide component 2 includes an inlet portion 21 connected to the first gas output portion 11 and an exhaust portion 22 arranged along the circumference of the first gas output portion 11 and communicating with the inlet portion 21, and the exhaust portion 22 is configured to output gas toward multiple angles of the circumference of the first gas output portion 11 along the above-mentioned end surface.

[0065] The liquid channel 3 is arranged along the circumference of the first gas channel 1 in a cross section perpendicular to the first gas channel 1. The liquid channel 3 includes a liquid output portion 31 provided on the end surface and arranged along the circumference of the gas guide component 2. The direction of the liquid output portion 31 intersects with the direction of the exhaust portion 22.

[0066] The second gas channel 4 is arranged along the circumference of the liquid channel 3 in the above-mentioned cross section. The second gas channel 4 includes a second gas output portion 41 provided on the end face and arranged along the circumference of the liquid output portion 31. The direction of the second gas output portion 41 intersects with the direction of the exhaust portion 22.

[0067] See attached Figure 7 , the slurry composed of the powder and the solvent is sprayed out through the liquid output part 31 and forms a primary atomization; the slurry after the primary atomization is impacted by the gas outputted from the exhaust part 22 and flowing along the end surface of the atomizing nozzle to perform a secondary atomization; the slurry after the secondary atomization is impacted by the gas outputted from the second gas output part 41 to perform a tertiary atomization. It can be seen that the atomizing nozzle of this embodiment can perform multiple atomizations on the above-mentioned slurry, which is conducive to improving the atomization effect.

[0068] Furthermore, the liquid output part 31 is arranged along the circumference of the gas guide component 2, and the above-mentioned slurry is output in a dispersed manner along the circumference of the gas guide component 2. The exhaust part 22 outputs at multiple angles in the circumference and the gas flowing along the above-mentioned end surface respectively impacts the slurry output by the liquid output part 31. The dispersedly output slurry is impacted at multiple angles in the circumference by the gas output by the exhaust part 22 of the gas guide component 2, which is beneficial to disperse and atomize the above-mentioned slurry, thereby improving the atomization efficiency.

[0069] Furthermore, the airflow outputted by the exhaust part 22 and the airflow outputted by the second gas output part 41 intersect, and by changing the flow rate or pressure of one or both of the gases in the exhaust part 22 and the second gas output part 41, the direction of the airflow after the two airflows meet can be changed, thereby obtaining different atomization angles. In this embodiment, the atomization angle can be adjusted within 0 to 180 degrees. Different atomization angles are matched according to different spray dryer sizes, and the flexibility of the layout of multiple atomizers is improved to achieve the best drying effect.

[0070] Combination Fig. 9 , 10 and Fig.11As shown, the exhaust part 22 includes exhaust ports arranged circumferentially of the first gas output part 11. The exhaust part 22 outputs gas concentratedly at a plurality of exhaust ports arranged circumferentially of the first gas output part 11, which is conducive to ensuring the pressure of the gas output from the exhaust ports and the impact force on the above-mentioned slurry, and can produce a better atomization effect than the exhaust part 22 being a circumferentially extending annular port.

[0071] In some embodiments, the gas guide component 2 includes a tubular component 23 whose one end is connected to the first gas output portion 11 and a blocking component 24 that blocks one end of the tubular component 23 away from the first gas output portion 11 , and the exhaust port is provided on the circumferential surface of the tubular component 23 .

[0072] The gas outputted from the first gas output portion 11 enters the tubular component 23, and is then dispersed to a plurality of exhaust ports along the circumference of the tubular component 23. The gas outputted from the plurality of exhaust ports flows in a dispersed manner at a plurality of angles along the circumference of the tubular component 23 and impacts the slurry outputted from the liquid output portion 31, so that the slurry is dispersed and atomized.

[0073] In some embodiments, one end of the tubular component 23 adjacent to the first gas output portion 11 is provided with a threaded structure 25 for connecting to the first gas output portion 11. The tubular component 23 is installed on the first gas output portion 11 through the threaded structure 25, which has the advantages of simple structure, low cost, and convenience in replacing different types of gas guide components 2 according to needs.

[0074] In some embodiments, the directions of the plurality of exhaust ports are inclined in the same direction relative to the radial direction of the first gas output portion 11, see Fig.10 The gases outputted from the multiple exhaust ports form a first rotating airflow rotating along the circumference of the first gas output part 11. The first rotating airflow can impact the slurry outputted from the liquid output part 31 and make the slurry generate a certain speed of circumferential rotation around the first gas output part 11, so that the powder and solvent in the slurry can be separated under the action of centrifugal force. Furthermore, the rotating gas is also more conducive to dispersing and atomizing the slurry, so as to further improve the atomization effect.

[0075] By changing the inclination direction of the exhaust port relative to the radial direction of the first gas output part 11, the rotation direction of the first rotating gas can be changed.

[0076] In other embodiments, a flow guide component is provided in the second gas channel 4 to enable the second gas output part 41 to output a rotating airflow, so that the gas output by the second gas output part 41 forms a second rotating airflow rotating in the circumferential direction of the first gas output part 11 .

[0077] The second rotating airflow can impact the slurry output from the liquid output part 31 and impacted by the gas output from the exhaust part 22, so that the slurry generates a certain speed of circumferential rotation around the first gas output part 11, so that the powder and the solvent in the slurry can be further separated due to the centrifugal force. Furthermore, the rotating gas is also more conducive to dispersing and atomizing the slurry, so as to further improve the atomization effect.

[0078] Optionally, the guide component includes a plurality of guide vanes arranged along the circumference of the liquid channel 3, the guide vanes are inclined relative to the axial direction of the liquid channel 3, and the rotation direction of the second rotating gas can be changed by adjusting the inclination direction of the guide vanes.

[0079] In some embodiments, the inclination direction of the exhaust port is configured to cause the first rotating airflow to rotate along a first direction on the circumference of the first gas output portion 11, and the guide component is configured to cause the second rotating airflow to rotate along a second direction on the circumference of the first gas output portion 11. The first direction is opposite to the second direction, which is beneficial to increase the relative speed of the two airflows and obtain a better droplet shearing effect.

[0080] In other embodiments, the direction of the exhaust port is consistent with the radial direction of the first gas output portion 11, see Fig.11 The gas discharged from the exhaust port can directly impact the slurry outputted from the liquid output part 31, so that the slurry can obtain a greater impact force, which is beneficial to the dispersion and atomization of the slurry.

[0081] In some embodiments, the liquid output portion 31 is tilted toward the gas guide component 2 relative to the direction perpendicular to the end surface, which is beneficial to increase the impact force between the slurry output by the liquid output portion 31 and the gas output by the exhaust portion 22, thereby improving the effect of atomizing the above-mentioned slurry.

[0082] See also Figure 4 The liquid output part 31 includes a plurality of drainage holes arranged along the circumference of the gas guide component 2. The slurry is discharged in a concentrated manner in the plurality of drainage holes, and the slurry can obtain a greater speed, which is beneficial to improving the atomization effect of the slurry.

[0083] Referring to the figure, the liquid channel 3 includes a first liquid channel section 33 adjacent to and connected to the liquid output portion 31, the first liquid channel section 33 gradually tilts toward the first gas channel 1 in the direction close to the liquid output portion 31, and the tilted first liquid channel section 33 guides the liquid toward the gas guide component 2 in an inclined manner relative to the direction perpendicular to the end surface, which is conducive to improving the impact force between the slurry output from the liquid output portion 31 and the gas output from the exhaust portion 22, thereby improving the effect of atomizing the above-mentioned slurry. The liquid channel 3 also includes a second liquid channel section 32 connected to one end of the first liquid channel section 33 away from the liquid output portion 31. The second liquid channel section 32 is annular and is sleeved outside the first gas channel 1.

[0084] In some embodiments, the direction of the exhaust portion 22 is parallel to the end face; the direction of the second gas output portion 41 is perpendicular to the end face; the direction of the second gas output portion 41 is perpendicular to the direction of the exhaust portion 22. The airflow output by the exhaust portion 22 and the airflow output by the second gas output portion 41 intersect, and by changing the flow rate or pressure of one or both of the gases in the exhaust portion 22 and the second gas output portion 41, the direction of the airflow after the intersection of the two airflows can be changed, thereby obtaining different atomization angles. In this embodiment, the atomization angle can be adjusted within 0~180. Different atomization angles are matched according to different spray dryer sizes to improve the flexibility of the layout of multiple atomizers and achieve the best drying effect.

[0085] In some embodiments, the atomizing nozzle further includes a nozzle body 5 and an annular cover 6. One end of the nozzle body 5 is provided with an end surface having a first gas output portion 11 and a liquid output portion 31, and the first gas channel 1 and the liquid channel 3 extend from the end surface to the other end of the nozzle body 5. The annular cover 6 is sleeved outside the nozzle body 5 and is spaced apart from the outer circumferential surface of the nozzle body 5 to form a second gas channel 4.

[0086] See also Figure 7 The nozzle body 5 includes a conical section and a cylindrical section connected to the conical section, wherein the first gas output part 11 and the liquid output part 31 are arranged on the end surface of the conical section away from the cylindrical section. The first gas channel 1 and the liquid channel 3 both extend along the axial direction of the nozzle body 5.

[0087] The annular cover 6 includes a first portion sleeved outside the above-mentioned conical section and a second portion sleeved outside the cylindrical section, and the second gas channel 4 includes a first gas channel section 44 formed between the first portion and the conical section and a second gas channel section 43 formed between the second portion and the cylindrical section. The annular cover 6 is provided with an air inlet 42 connected to the second gas channel 4.

[0088] The annular cover 6 is sleeved outside the nozzle body 5 and connected to the nozzle body 5 through an annular connecting piece 7. An internal thread connected to the nozzle body is provided on the inner circumference of the connecting piece. The connecting piece 7 and the annular cover 6 are also connected through threads.

[0089] In this embodiment, the atomizing nozzle mainly comprises a nozzle body 5, an annular cover 6 and a connecting piece 7, and has the advantages of simple structure and easy processing and manufacturing.

[0090] In some embodiments, the atomizing nozzle includes at least two gas guide components 2, and one of the at least two gas guide components 2 is replaceably mounted on the first gas output portion 11. Fig.12 and Fig.13 A gas guide component 2 is shown respectively. The exhaust ports of the two airflow guide components have different sizes. The airflow flow rates of the airflows ejected under the same air pressure are different. The need to adjust the atomization angle under different working conditions can be achieved by preparing a series of airflow redirecting devices with different flow channel sizes.

[0091] According to another aspect of the present application, a spray dryer is also provided, the spray dryer comprising the above-mentioned atomizing nozzle.

[0092] See also Fig.14 The spray dryer also includes a first gas pipeline 81 for conveying gas to the first gas channel 1, a second gas pipeline 82 for conveying gas to the second gas channel 4, a first regulating valve 91 arranged in the first gas pipeline 81, and a second regulating valve 92 arranged in the second gas pipeline 82. The airflow output by the exhaust part 22 and the airflow output by the second gas output part 41 intersect with each other. By changing the flow rate or pressure of one or both of the gases in the exhaust part 22 and the second gas output part 41, the direction of the airflow after the intersection of the two airflows can be changed, thereby obtaining different atomization angles. In this embodiment, the atomization angle can be adjusted within 0~180. Different atomization angles are matched according to different spray dryer sizes to improve the flexibility of the layout of multiple atomizers and achieve the best drying effect.

[0093] The spray dryer also includes a liquid pipeline 83 for outputting the slurry to be dried to the liquid channel 3 and a third regulating valve 93 disposed in the liquid pipeline 83. By adjusting the amount of slurry output from the liquid pipeline 83, the ratio of the slurry to the gas output from the exhaust part 22 and the second gas output part 41 can be adjusted, which is conducive to adjusting the atomization effect to the optimal level.

[0094] In this embodiment, a gas guide component 2 for changing the direction of the airflow is installed on the first gas output part 11 of the atomizing nozzle, so that the airflow output by the exhaust part 22 intersects with the airflow output by the second gas output part 41, and the angle between the directions of the two airflows can be 80 to 100 degrees, preferably 90 degrees.

[0095] The direction of the airflow after the two airflows meet can be changed to obtain different atomization angles. In this embodiment, the atomization angle can be adjusted within 0 to 180 degrees. Different atomization angles are matched according to different spray dryer sizes to improve the layout flexibility of multiple atomizers and achieve the best drying effect.

[0096] The gas guide component 2 is mounted on the first gas output portion 11 through a threaded structure, and different gas guide components 2 can be easily replaced.

[0097] The liquid output part 31 includes a plurality of drainage holes arranged along the circumference of the gas guide component. The slurry is sprayed out through the drainage holes at high pressure to form a primary pressure atomization, and the sprayed droplets can be subjected to secondary and tertiary atomization after being acted upon by two airflows, which is conducive to the formation of micron-sized droplets.

[0098] (1) The high-pressure liquid flow can form a primary atomization through the drainage holes arranged in a ring array (when the hole diameter is <0.8mm and the liquid flow pressure is >40Mpa, a primary pressure atomization can produce droplets <30μm). The droplets of the primary atomization are sprayed and dispersed along the four sides by the redirected middle airflow to form a secondary atomization. The airflow sprayed to the four sides intersects with the outer ring atomization airflow. After the two high-pressure airflows collide, they cut the droplets again to form a third atomization, forming micron-sized droplets.

[0099] (2) The exhaust part 22 ejects airflow radially from the first gas output part 11 to disperse the droplets radially, thereby reducing the agglomeration of the droplets.

[0100] (3) After the liquid flow is dispersed through the annular array drainage holes, the single hole discharge flow rate is reduced, the liquid is mixed more fully with the airflow, and the consistency of the droplet particle size is improved.

[0101] The high-pressure liquid flow is ejected through the discharge hole of the liquid output portion 31 of the liquid channel 3, and the slurry is atomized due to the pressure.

[0102] The middle atomizing compressed air enters from the first gas channel 1, is redirected by the gas guide component 2, and then is ejected radially along the first gas output part 11, cutting the atomized droplets ejected from the array-arranged discharge holes to produce secondary atomization and diffuse the droplets around.

[0103] The outer ring atomized compressed air is ejected through the second gas output portion 41 of the second gas channel 4, and meets the mist droplets diffused and ejected along the periphery and the compressed air redirected in the middle. The two high-pressure airflows collide and cut and scatter the mist droplets again to form fine mist droplets.

[0104] Compared with the traditional three-fluid atomizing nozzle, the three-fluid nozzle after airflow redirection has the following beneficial effects

[0105] During the entire atomization process, the atomized droplets have no contact with the nozzle components, so there will be no problems such as lint and material accumulation. The three-stage atomization can be used to produce extremely fine solid particles, up to the micron level, which is suitable for the spray drying process of high-viscosity powders.

[0106] The liquid flows through the annular array for dispersion, and the droplets are dispersed by the primary atomizing compressed gas, which reduces the agglomeration of droplets and makes the particle size of the dried powder more uniform.

[0107] The atomization angle can be adjusted to match the production of different dryer sizes, improving the flexibility of multi-gun production layout.

[0108] According to another aspect of the present application, a production device for battery powder is also provided, and the production device for battery powder includes the above-mentioned spray dryer.

[0109] The above are only exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An atomizing nozzle, characterized in that: include: A first gas channel (1) comprising a first gas output portion (11) located on an end surface of the atomizing nozzle; A gas guide component (2), comprising an inlet portion (21) connected to the first gas output portion (11) and an exhaust portion (22) arranged along the circumference of the first gas output portion (11) and connected to the inlet portion (21), wherein the exhaust portion (22) is configured to output gas along the end surface toward a plurality of angles in the circumference of the first gas output portion (11); a liquid channel (3) arranged along the circumference of the first gas channel (1) in a cross section perpendicular to the first gas channel (1), the liquid channel (3) comprising a liquid output portion (31) provided on the end surface and arranged along the circumference of the gas guide component (2), the direction of the liquid output portion (31) intersecting with the direction of the gas exhaust portion (22); as well as The second gas channel (4) is arranged in the cross section along the circumference of the liquid channel (3), and the second gas channel (4) includes a second gas output portion (41) provided on the end surface, and the direction of the second gas output portion (41) intersects with the direction of the exhaust portion (22).

2. The atomizing nozzle according to claim 1, characterized in that: The exhaust portion (22) comprises a plurality of exhaust ports arranged along the circumference of the first gas output portion (11).

3. The atomizing nozzle according to claim 2, characterized in that: The gas guide component (2) comprises a tubular component (23) whose one end is connected to the first gas output portion (11) and a blocking component (24) that blocks an end of the tubular component (23) away from the first gas output portion (11), and the exhaust port is arranged on the circumferential surface of the tubular component (23).

4. The atomizing nozzle according to claim 3, characterized in that: A threaded structure (25) for connecting to the first gas output portion (11) is provided in the cylindrical component (23) adjacent to the first gas output portion (11).

5. The atomizing nozzle according to claim 2, characterized in that: The direction of the exhaust port is consistent with the radial direction of the first gas output portion (11); or The directions of the plurality of exhaust ports are respectively inclined in the same direction relative to the radial direction of the first gas output portion (11), so that the gas outputted from the plurality of exhaust ports forms a first rotating airflow rotating in the circumferential direction of the first gas output portion (11); or The second gas duct (4) is provided with a flow guide component for causing the second gas output portion (41) to output a rotating airflow, so that the gas output by the second gas output portion (41) forms a second rotating airflow rotating in a circumferential direction of the first gas output portion (11).

6. The atomizing nozzle according to claim 5, characterized in that: The inclination direction of the exhaust port is configured to cause the first rotating airflow to rotate in a first direction on the circumference of the first gas output portion (11), and the guide component is configured to cause the second rotating airflow to rotate in a second direction on the circumference of the first gas output portion (11), and the first direction is opposite to the second direction.

7. The atomizing nozzle according to claim 1, characterized in that: The direction of the liquid discharge portion (31) is inclined toward the gas guide component (2) relative to a direction perpendicular to the end surface.

8. The atomizing nozzle according to claim 1, characterized in that: The liquid output portion (31) comprises a plurality of liquid discharge holes arranged along the circumference of the gas guide component (2).

9. The atomizing nozzle according to claim 1, characterized in that: The liquid channel (3) comprises a first liquid channel section (33) adjacent to the liquid output portion (31) and connected to the liquid output portion (31), and the first liquid channel section (33) gradually inclines toward the first gas channel (1) along a direction approaching the liquid output portion (31).

10. The atomizing nozzle according to claim 1, characterized in that: The exhaust portion (22) is oriented parallel to the end surface; and / or The second gas output portion (41) is oriented perpendicular to the end surface; and / or The direction of the second gas output portion (41) is perpendicular to the direction of the exhaust portion (22).

11. The atomizing nozzle according to claim 1, characterized in that: Also includes: A nozzle body (5) having an end surface having the first gas output portion (11) and the liquid output portion (31) at one end, the first gas channel (1) and the liquid channel (3) extending from the end surface to the other end of the nozzle body (5); as well as An annular cover (6) is sleeved outside the nozzle body (5) and is spaced apart from the outer peripheral surface of the nozzle body (5) to form the second gas channel (4).

12. The atomizing nozzle according to claim 1, characterized in that: The atomizing nozzle comprises at least two gas guide components (2), and at least one of the two gas guide components (2) is replaceably mounted on the first gas output portion (11).

13. A spray dryer, characterized in that: The atomizing nozzle comprises the atomizing nozzle according to any one of claims 1 to 12.

14. The spray dryer according to claim 13, characterized in that It also includes a first gas pipeline (81) for conveying gas to the first gas channel (1), a second gas pipeline (82) for conveying gas to the second gas channel (4), a first regulating valve (91) arranged in the first gas pipeline (81), and a second regulating valve (92) arranged in the second gas pipeline (82).

15. A production device for battery powder, characterized in that: Comprising the spray dryer as described in claim 13 or 14.

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