Sprayer, spray drying system and control method thereof

Abstract

The present application relates to a sprayer, a spray drying system and a control method thereof, wherein the sprayer comprises: a main body, having a material channel and an atomizing channel, the atomizing channel being used to convey a medium so that the medium impacts the material at the outlet of the material channel and atomizes it at least twice; and a nozzle, arranged at the discharge end of the main body, respectively connected to the material channel and the atomizing channel; the nozzle comprises an atomizing member, the atomizing member comprises a liquid guide tube, a flow guide member and a spray plate, the spray plate being arranged at the outlet of the liquid guide tube; the flow guide member is used to accelerate the material in rotation along a first rotation direction, and a spray hole connected to the material channel is formed through the spray plate, and the aperture of the spray hole is smaller than the outlet of the liquid guide tube. Under the action of the material channel and the atomizing channel, the material can be cut multiple times by the medium in the present application, and the particle size of the material finally atomized can be better controlled, so that the atomized material particles have a smaller particle size.

Description

Technical Field

[0001] The present application relates to the technical field of spray granulation, and in particular to a sprayer, a spray drying system and a control method thereof. Background Art

[0002] Spray granulation is a granulation method in which a slurry or solution is sprayed into a granulation tower. Under the action of the spray hot air, the slurry or solution is dried and agglomerated to obtain spherical granules. This method is widely used to produce catalysts of various particle sizes or other particles with certain particle size requirements. In the production process of spray granulation, the requirements for the final particle size of the received material are different.

[0003] For some special fields or special materials, current production has certain limitations and cannot meet the actual particle size requirements. Summary of the invention

[0004] Based on this, it is necessary to provide a sprayer, a spray drying system and a control method thereof to address the problem that the particle size produced by the current spray granulation device or method is limited and cannot meet the requirements of smaller particle size.

[0005] In the first aspect, the present application provides a sprayer suitable for conveying materials and atomizing the materials, comprising a main body and a nozzle, wherein a material channel and an atomizing channel are provided inside the main body, the material channel is used to convey materials, and the atomizing channel is used to convey a medium, at the outlet of the material channel, the medium impacts the material and atomizes the material at least twice; the nozzle is arranged at the discharge end of the main body, and the nozzle is respectively connected to the material channel and the atomizing channel; the nozzle comprises an atomizing component, and the atomizing component comprises a liquid guide tube, a flow guide component and a spray plate, the atomizing component is connected to the outlet of the material channel, the inlet of the liquid guide tube is connected to the material channel, the flow guide component is arranged in the liquid guide tube and is located on the side close to the outlet of the liquid guide tube, and the spray plate is arranged at the outlet of the liquid guide tube; wherein the flow guide component is used to rotate and accelerate the material along a first rotation direction, and a spray hole connected to the material channel is formed through the spray plate, and the aperture of the spray hole is smaller than the outlet of the liquid guide tube.

[0006] Through the above structure, under the action of the material channel and the atomization channel, the material can be cut multiple times by at least two media, which can better control the particle size of the material finally atomized and make the atomized material particles have a smaller particle size.

[0007] By providing an atomizing element, the material can be atomized for the first time in the material channel, and then atomized multiple times through the medium in each atomizing channel, which can improve the atomization effect and better control the particle size of the atomized material particles.

[0008] Through the above structure, the material can be accelerated in rotation along the first rotation direction, and then sprayed out through the spray holes on the spray plate, while achieving the first atomization of the material.

[0009] In some embodiments, a guide groove is provided on the outer periphery of the guide member, and the guide groove is bent along the first rotation direction and extends along the axial direction of the material channel.

[0010] By providing the guide groove, the rotation acceleration of the material along the first rotation direction can be achieved, so that the material can be smoothly sprayed out through the spray hole and atomized to form small droplets.

[0011] In some embodiments, the atomization channel includes a first sub-channel arranged around the periphery of the material channel, and the nozzle also includes a first dispersing member connected to the main body, and the first dispersing member is used to rotationally accelerate the medium in the first sub-channel along a second rotation direction so that the medium after rotational acceleration can impact the material to atomize it a second time; wherein the second rotation direction is opposite to the first rotation direction.

[0012] Through the above structure, the medium in the first subchannel can cut the material after the first atomization in the opposite direction, and the medium can better rub and shear the small droplets after the first atomization, turning them into small droplets with smaller particle size, thereby realizing the second atomization of the material.

[0013] In some embodiments, the first dispersing member is connected to the discharge end of the main body, and a plurality of flow holes penetrating along a preset direction are formed on the first dispersing member, each flow hole is connected to the first sub-channel and extends along the second rotation direction.

[0014] Through the above structure, the medium in the first subchannel can pass through each flow hole smoothly, and rotate and accelerate along the second rotation direction under the guidance of the flow hole, so as to better frictionally shear the small droplets after the first atomization and realize the second atomization of the material.

[0015] In some embodiments, the atomization channel also includes a second sub-channel arranged around the periphery of the first sub-channel, and the nozzle also includes a second dispersing member connected to the main body, and the second dispersing member is used to rotationally accelerate the medium in the second sub-channel along the first rotation direction so that the medium after rotational acceleration can impact the material to cause it to be atomized for a third time.

[0016] Through the above structure, the medium in the second sub-channel can be rotated and accelerated under the action of the second dispersing member, and the material can be frictionally sheared to complete the third atomization. In addition, since the rotation acceleration direction of the medium in the second sub-channel is opposite to the rotation acceleration direction of the medium in the first sub-channel, the shearing effect of both on the material can be further enhanced, thereby improving the atomization effect.

[0017] In some embodiments, in a preset direction, the second dispersing component has a connecting end and an outlet end that are relatively arranged, the connecting end is connected to the discharge end of the main body, the second dispersing component is sleeved on the outer periphery of the first dispersing component, and the outlet end is arranged around the outer periphery of the outlet of the liquid guiding tube; wherein the second dispersing component and the liquid guiding tube enclose a first material transfer cavity, and the first material transfer cavity is used to accommodate the medium after being accelerated by rotation of the first dispersing component.

[0018] Through the above structure, in addition to rotationally accelerating the medium in the second sub-channel, the second disperser can also gather the medium in the first sub-channel, so that the medium in the first sub-channel can better frictionally shear the material after the first atomization after rotational acceleration, thereby completing the second atomization of the material.

[0019] In some embodiments, in a direction perpendicular to the preset direction, the diameter of the second dispersing member gradually decreases from the connecting end to the outlet end.

[0020] In this way, the medium in the first material transfer chamber can be better gathered so that it can act intensively on the material after the first atomization, thereby improving the effect of the second atomization.

[0021] In some embodiments, the nozzle also includes an outer cover, which is connected to the discharge end of the main body and is arranged on the periphery of the second dispersing component, and the outer cover has an injection port arranged around the periphery of the outlet end; wherein a second material transfer cavity is formed between the outer cover and the second dispersing component, and the second material transfer cavity is respectively connected to the second sub-channel and the injection port.

[0022] Through the above structure, the outer cover can provide protection for the second dispersing member, and can form a second material passage cavity for gas to pass through between the outer cover and the second dispersing member, so that the gas in the second sub-channel can be smoothly ejected from the injection port through the second material passage cavity and act on the material to achieve the third atomization of the material.

[0023] In some embodiments, a plurality of fins are protruding from the outer periphery of the second dispersing member, and each fin is extended along the first rotation direction.

[0024] In this way, the gas in the second sub-channel can be ejected from the gap between each two adjacent fins, and during the ejection process, the gas is guided by the fins on both sides to accelerate the rotation, thereby better frictionally shearing the material.

[0025] In some embodiments, in a plane perpendicular to the preset direction, the angle between two adjacent fins ranges from 30° to 50°. Thus, the fins can be matched with the flow holes on the first dispersing member to form a reverse angle between the two, so that the directions of the two airflows are opposite, thereby better atomizing the material.

[0026] In some embodiments, the outer cover is movably disposed on the main body along a preset direction to adjust the distance between the injection port and the outlet end in the preset direction.

[0027] Therefore, by moving the outer cover in a preset direction, the particle size of the material particles after the third atomization can be fine-tuned, thereby further improving the accuracy of the particle size and improving the atomization effect.

[0028] In a second aspect, the present application further provides a spray drying system, including a feed assembly, an air supply assembly and a spray drying device, the spray drying device including a drying chamber and at least one sprayer as described above, the sprayer being used to spray atomized material particles into the drying chamber;

[0029] The material supply component is communicated with the feed end of the material channel in the sprayer for providing materials, and the air supply component is communicated with each atomization channel respectively for providing medium.

[0030] In some embodiments, the feeding assembly includes at least two feeding lines, each of which is connected to the material channel respectively, and each includes a material tank, a diaphragm pump, a safety valve and a discharge barrel. The material tank and the material channel are connected by a pipeline. The diaphragm pump is arranged on the pipeline between the material tank and the material channel to pressurize the material in the pipeline; the safety valve is connected between the material tank and the discharge barrel, and is used to open when the pressure between the material tank and the material channel reaches a preset value, and discharge the pressurized material into the discharge barrel.

[0031] The above structure can not only realize continuous material feeding and improve production efficiency, but also can release pressure in time when material blockage occurs, thus ensuring the smooth progress of the production process.

[0032] In some embodiments, the spray drying system further includes a dehumidification component, which is connected to the spray drying device and is used to control the air humidity in the drying chamber. By providing the dehumidification component, the air humidity entering the drying chamber can be better controlled, thereby improving the drying efficiency of the material particles in the drying chamber.

[0033] In some embodiments, the spray drying system further comprises a heating component, which is connected to the spray drying device and is used to control the temperature in the drying chamber. Through the above structure, the temperature balance in the drying chamber can be better controlled, so that the material particles can be cooled more quickly in the drying chamber, thereby improving the drying efficiency.

[0034] In some embodiments, the spray drying system further comprises an air sweeping assembly, which is disposed on the inner wall of the drying chamber and is used to blow drying air toward the inner wall of the drying chamber.

[0035] Through the above structure, the inner wall of the drying chamber is continuously purged, which can reduce the probability of materials sticking to the inner wall of the drying chamber, thereby reducing the probability of material blockage and improving drying efficiency.

[0036] In some embodiments, the spray drying system further comprises a cooling jacket, which is arranged on the outer periphery of the drying chamber, thereby further cooling the chamber wall of the drying chamber and reducing the probability of the material sticking to the wall due to high temperature.

[0037] In some embodiments, the spray drying system also includes an air supply component and a material receiving component. The material receiving component is connected to the discharge port of the drying chamber and is used to receive the material that has been dried. The air supply component is arranged between the discharge port of the drying chamber and the material receiving component, and is used to provide dry cold air blown from the discharge port of the drying chamber to the material receiving component.

[0038] In this way, on the one hand, the air supply component can speed up the material transportation from the discharge port of the drying chamber to the receiving component, thereby improving the receiving efficiency; on the other hand, the dry cold air can quickly cool the material during the transportation process.

[0039] In a third aspect, the present application further provides a control method for a spray drying system, which is used to control the spray drying system as described above, and the control method comprises the steps of:

[0040] The pressurized material is input into the material channel of the sprayer, and the material is atomized for the first time after being accelerated by rotation in the material channel;

[0041] Gas is input into the atomization channel, and after being accelerated by rotation, the gas impacts the material after the first atomization, and atomizes the material for the second time;

[0042] The gas is input into the atomization channel, and after being accelerated by rotation, the gas impacts the material after the second atomization, and atomizes the material for the third time;

[0043] The material after three times of atomization is transported to the drying chamber for drying;

[0044] Collect the materials after drying.

[0045] In some embodiments, the step of inputting pressurized material into the material channel of the sprayer and performing the first atomization of the material after rotational acceleration in the material channel specifically includes:

[0046] The material is accelerated in rotation along a first rotation direction in the material channel and is atomized for the first time.

[0047] In some embodiments, the step of inputting gas into the atomization channel, the gas impacting the first atomized material after rotational acceleration, and atomizing the material for the second time specifically includes:

[0048] High-pressure gas at a first temperature is input into the first subchannel, and the high-pressure gas at the first temperature rotates and accelerates along a second rotation direction, and impacts the material after the first atomization, and atomizes it for the second time; wherein the second rotation direction is opposite to the first rotation direction.

[0049] In some embodiments, the step of inputting gas into the atomization channel, the gas impacting the second atomized material after rotational acceleration, and atomizing the material for the third time specifically includes:

[0050] High-pressure gas at a second temperature is input into the second subchannel, and the high-pressure gas at the second temperature rotates and accelerates along the first rotation direction, and impacts the material after the second atomization, and atomizes it for the third time; wherein the second temperature is higher than the first temperature.

[0051] In some embodiments, the step of conveying the material after three atomizations to the drying chamber for drying specifically includes:

[0052] Control the humidity and temperature of the air in the drying chamber;

[0053] Blowing dry air toward the inner wall of the drying chamber;

[0054] The cooling medium is conveyed into the cooling jacket at the periphery of the drying chamber.

[0055] In some embodiments, the step of collecting the dried material further includes the following steps:

[0056] Dry cold air is blown from the discharge port of the drying chamber to the receiving component.

[0057] The above-mentioned sprayer, spray drying system and control method thereof, under the action of the material channel and at least two atomization channels, the material can be cut multiple times by the medium, which can better control the particle size of the material finally atomized and make the atomized material particles have a smaller particle size. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 Schematic diagram of the structure of a sprayer according to one or more embodiments.

[0059] Figure 2 is an exploded schematic diagram of a sprayer according to one or more embodiments.

[0060] Figure 3 Schematic diagram of the structure of an atomizer in a sprayer according to one or more embodiments.

[0061] Figure 4 Schematic diagram of the structure of a spray piece in a sprayer according to one or more embodiments.

[0062] Figure 5Schematic diagram of the structure of a flow guide in a sprayer according to one or more embodiments.

[0063] Figure 6 It is a schematic diagram of the three-dimensional structure of the second dispersing member in the sprayer according to one or more embodiments.

[0064] Figure 7 is a cross-sectional view of a second dispersing member in a nebulizer according to one or more embodiments.

[0065] Figure 8 Schematic diagram of the structure of a spray head in a sprayer according to one or more embodiments.

[0066] Fig. 9 Schematic diagram of the structure of a spray drying system according to one or more embodiments.

[0067] Fig.10 Schematic diagram of the structure of a feed assembly in a spray drying system according to one or more embodiments.

[0068] Fig.11 Schematic diagram of the structure of a drying chamber in a spray drying system according to one or more embodiments.

[0069] Fig.12 is a flow chart of a method for controlling a spray drying system according to one or more embodiments.

[0070] Description of reference numerals: 100, spray drying system; 10, sprayer; 20, feeding assembly; 30, air supply assembly; 40, air sweep assembly; 50, cooling jacket; 60, air supply assembly; 70, material receiving assembly; 80, drying chamber; 11, main body; 12, nozzle; 21, material tank; 22, diaphragm pump; 23, safety valve; 24, discharge barrel; 111, material channel; 112, first sub-channel; 113, second sub-channel; 121, atomizing element; 122, first dispersing element; 123, flow hole; 124, second dispersing element; 125, connecting end; 126, outlet end; 127, first material passage chamber; 128, outer cover; 1211, liquid guide tube; 1212, flow guide element; 1213, spray plate; 1214, spray hole; 1215, flow guide groove; 1241, fin; 1281, injection port; 1282, second material passage chamber; a, preset direction. DETAILED DESCRIPTION

[0071] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0072] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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.

[0073] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0075] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0077] Granulation is a very important process in the production of PTC thermistor ceramic sheets. The quality of granular powder (referred to as granular material) directly affects the appearance, mechanical properties and temperature resistance characteristics of the boiling dryer of the PTC ceramic sheet. Granulation refers to adding a certain amount of adhesive to the ground powder and evenly blending it to form a granular powder. This powder has good fluidity and calendering properties, and can obtain a sheet with good strength and not easy to delaminate and crack in the tableting process.

[0078] In industrial production, spray drying is used for granulation. The basic principle is to spray the powder with a binder into a granulation tower (also called a drying tower) with a sprayer for atomization. The drying tower has a drying chamber. The droplets in the drying chamber are dried into granular powder by the hot air flow in the drying chamber and then discharged from the bottom of the drying chamber.

[0079] At present, sprayers usually use two-fluid spray guns for spray granulation. The particle size produced by this method is usually around 10μm. Due to the limitations of its equipment and process, it is impossible to obtain powder with a smaller particle size. Especially for materials with special properties such as strong heat sensitivity and high viscosity, the particle size of the powder is greatly affected by temperature. If the water content of the material is too high or the temperature is too high, it is easy to cause problems such as sticking to the tower wall, sticking to the conveying pipeline, and blocking the nozzle, resulting in low production efficiency.

[0080] Based on the above considerations, in order to solve the problem that the particle size produced by the current spray granulation device or method is limited and cannot meet the requirements of smaller particle size, a sprayer is provided in one or more embodiments of the present application. Under the action of the material channel and at least two atomization channels, the material can be cut multiple times by at least two media, which can better control the particle size of the material finally atomized and make the atomized material particles have a smaller particle size.

[0081] See also Figure 1 and Figure 2 An embodiment of the present application provides a sprayer 10, which is suitable for conveying materials and atomizing the materials. The sprayer 10 includes a main body 11 and a nozzle 12. The main body 11 has a material channel 111 and an atomizing channel inside. The material channel 111 is used to convey materials, and the atomizing channel is used to convey a medium. At the outlet of the material channel 111, the medium impacts the material and atomizes the material at least twice. The nozzle 12 is arranged at the discharge end of the main body 11, and the nozzle 12 is connected to the material channel 111 and the atomizing channel respectively. The nozzle 12 includes an atomizer 121, which includes a liquid guide tube 1211, a flow guide 1212 and a spray plate 1213. The atomizer 121 is connected to the outlet of the material channel 111. The inlet of the liquid guide tube 1211 is connected to the material channel 111. The flow guide 1212 is arranged in the liquid guide tube 1211 and is located near the outlet of the liquid guide tube 1211. The spray plate 1213 is arranged at the outlet of the liquid guide tube 1211. The flow guide 1212 is used to accelerate the material in rotation along the first rotation direction. The spray plate 1213 is penetrated by a spray hole 1214 connected to the material channel 111. The aperture of the spray hole 1214 is smaller than the outlet of the liquid guide tube 1211.

[0082] It should be noted that the sprayer 10 is a device that can atomize the material and disperse the material into droplets or mist droplets. The material particles atomized by the sprayer 10 can be dried in the drying chamber to evaporate the water on the surface and inside of the material, thereby forming a granular powder.

[0083] The specific shape of the main body 11 can be set according to the actual production needs, for example, it can be set to a cylindrical structure, and the preset direction a is the axial direction of the main body 11. A material channel 111 and at least two atomization channels are formed inside the main body 11, and the material channel 111 and the atomization channel are both extended along the preset direction a. Among them, in the preset direction a, the main body 11 has a feed end and a discharge end, and the inlets of the material channel 111 and each atomization channel are opened at the feed end, and the outlet is opened at the discharge end. In this way, the material can enter from the entrance of the material channel 111 and move toward the outlet in the material channel 111; similarly, a medium such as a gas can enter from the entrance of the corresponding atomization channel and move toward the outlet in the corresponding atomization channel.

[0084] Specifically, the outlet of the material channel 111 is aligned with the outlet of the atomization channel, so that when the gas is ejected from the atomization channel, it can impact the material in different ejection directions to form a shear force on the material, so that the material is cut and dispersed into small droplets or small mist droplets to achieve atomization.

[0085] Furthermore, the nozzle 12 refers to a structure that can spray out atomized material particles. The nozzle 12 is connected to the discharge end of the main body 11, and can be specifically detachably connected to the discharge end of the main body 11, and the nozzle 12 is connected to the material channel 111 and each atomization channel. In this way, the material can be sprayed out from the nozzle 12. At the same time, the gas in the atomization channel can also be sprayed out from the nozzle 12, and cut the material while spraying, thereby realizing the atomization of the material.

[0086] Through the above structure, under the action of the material channel 111 and the atomization channel, the material can be cut multiple times by at least two media, which can better control the particle size of the material finally atomized and make the atomized material particles have a smaller particle size.

[0087] In some embodiments, the nozzle 12 includes an atomizing element 121 connected to the outlet of the material channel 111 , and the atomizing element 121 is used to perform a first atomization on the material in the material channel 111 .

[0088] Specifically, the atomizer 121 is connected to the main body 11 and is connected to the outlet of the material channel 111. The atomizer 121 can be connected to the main body 11 by, but not limited to, a clamping connection or a screw connection.

[0089] The material moves in the material channel 111 . When it moves to the outlet of the material channel 111 , the material passes through the atomizer 121 , and is atomized for the first time under the action of the atomizer 121 , and the material is dispersed into small droplets.

[0090] By providing the atomizing element 121, the material can be atomized for the first time in the material channel 111, and then atomized multiple times by the medium in the atomizing channel, which can improve the atomization effect and better control the particle size of the atomized material particles.

[0091] like Figure 1 , Figure 3 as well as Figure 4As shown, in some embodiments, the atomizer 121 includes a liquid guide tube 1211, a flow guide 1212, and a spray plate 1213. The liquid guide tube 1211 has an inlet and an outlet, the inlet is connected to the material channel 111, the flow guide 1212 is arranged in the liquid guide tube 1211 and is located on a side close to the outlet, and the spray plate 1213 is arranged at the outlet. The flow guide 1212 is used to accelerate the material in a first rotation direction, and the spray plate 1213 is provided with a spray hole 1214 connected to the material channel 111 along a preset direction a, and the aperture of the spray hole 1214 is smaller than the outlet of the liquid guide tube 1211.

[0092] Specifically, the liquid conduit 1211 refers to a tubular structure with a hollow interior, which can realize the transportation of materials. The inlet of the liquid conduit 1211 is connected with the material channel 111 so that the material can enter the liquid conduit 1211 from the material channel 111.

[0093] The guide member 1212 is a structure that can rotate and accelerate the material so that the material can be better atomized. The guide member 1212 is arranged inside the liquid guide tube 1211 and is located on the side close to the outlet. The spray plate 1213 is arranged at the outlet of the liquid guide tube 1211, and a spray hole 1214 is opened on the spray plate 1213, and the aperture of the spray hole 1214 is smaller than the outlet aperture of the liquid guide tube 1211.

[0094] As a specific embodiment, the aperture of the ejection hole 1214 can be set to be less than 1 mm. In this way, the material is first accelerated in the first rotation direction by the guide member 1212, and then ejected through the ejection hole 1214. In this process, the first atomization is completed, and the material can be atomized to form small droplets.

[0095] The first rotation direction may be set to be clockwise, that is, after the material passes through the guide member 1212, it can be accelerated in the clockwise direction to move toward the spray piece 1213, and finally sprayed out through the spray hole 1214 and atomized to form small droplets.

[0096] Through the above structure, the material can be accelerated in rotation along the first rotation direction, and then sprayed out through the spray holes 1214 on the spray plate 1213, and at the same time, the first atomization of the material is achieved.

[0097] like Figure 3 and Figure 5 As shown, in some embodiments, a guide groove 1215 is provided on the outer periphery of the guide member 1212 , and the guide groove 1215 is bent along the first rotation direction and extends along the axial direction of the material channel 111 .

[0098] Specifically, in order to enable the guide member 1212 to better rotate and accelerate the material in the liquid guiding tube 1211, the shape of the guide member 1212 can be set to match the internal channel of the liquid guiding tube 1211. At the same time, a guide groove 1215 is provided on the outer periphery of the guide member 1212, and the guide groove 1215 extends along the axial direction of the material channel 111, that is, the guide groove 1215 extends along the axial direction of the internal channel of the liquid guiding tube 1211; in addition, the guide groove 1215 also bends and rotates in the clockwise direction, so that after the material in the liquid guiding tube 1211 enters the guide groove 1215, it flows along the guide groove 1215 in the clockwise direction, and is accelerated under the guidance of the guide groove 1215, so as to achieve the purpose of rotating and accelerating the material in the clockwise direction.

[0099] Furthermore, a plurality of guide grooves 1215 can be provided, and the guide grooves 1215 can be arranged at intervals along the circumference of the guide member 1212 , so that the material can enter the corresponding guide groove 1215 for rotational acceleration.

[0100] When the material flows out from the guide groove 1215, the material moves toward the spray plate 1213, and is atomized into small droplets under the squeezing action of the spray hole 1214, thereby achieving the first atomization of the material.

[0101] It can be understood that in order to allow the material to pass through the material channel 111 more smoothly into the liquid guide tube 1211, and pass through the guide groove 1215 and the ejection hole 1214 in turn, pressurization can be performed when the material is transported into the material channel 111, so that the material can better pass through the material channel 111 into the liquid guide tube 1211 under the action of the initial pressure, and finally achieve the first atomization under the action of the guide groove 1215 and the ejection hole 1214.

[0102] By providing the guide groove 1215, the rotation acceleration of the material along the first rotation direction can be achieved, so that the material can be smoothly sprayed out through the spray hole 1214 and atomized to form small droplets.

[0103] Please see again Figure 1 and Figure 2 In some embodiments, the atomization channel includes a first sub-channel 112 arranged around the periphery of the material channel 111, and the nozzle 12 also includes a first dispersion member 122 connected to the main body 11, and the first dispersion member 122 is used to rotate and accelerate the medium in the first sub-channel 112 along the second rotation direction, so that the medium after rotation acceleration can impact the material to atomize it for the second time. The second rotation direction is opposite to the first rotation direction.

[0104] Specifically, the first sub-channel 112 is disposed around the outer circumference of the material channel 111 , that is, the material channel 111 and the first sub-channel 112 are disposed sequentially along the radial direction of the material channel 111 .

[0105] The first dispersing member 122 is a structure that can further disperse the material in the form of small droplets sprayed from the material channel 111 to further atomize it. The first dispersing member 122 is connected to the main body 11 and is connected to the discharge end of the main body 11. The first dispersing member 122 can be connected to the main body 11 by, but not limited to, a clamping connection or a screw connection.

[0106] The second rotation direction is opposite to the first rotation direction. When the first rotation direction is set to the clockwise direction, the second rotation direction can be set to the counterclockwise direction. The medium in the first subchannel 112 can be gas. The gas is accelerated in the counterclockwise direction under the action of the first dispersion member 122. When the gas is ejected from the first dispersion member 122, it has a moving direction opposite to the material ejected from the ejection hole 1214, so that the gas can better cut the material, further atomize the small droplets into droplets with smaller particle size, and realize the second atomization of the material.

[0107] Through the above structure, the medium in the first subchannel 112 can cut the material after the first atomization in the opposite direction, and the medium can better rub and shear the small droplets after the first atomization, turning them into small droplets with smaller particle size, thereby realizing the second atomization of the material.

[0108] In some embodiments, the first dispersing member 122 is connected to the discharge end of the main body 11, and the first dispersing member 122 is provided with a plurality of flow holes 123 penetrating along a preset direction a, each flow hole 123 is connected to the first sub-channel 112 and extends along the second rotation direction.

[0109] Specifically, the first dispersing member 122 is connected to the discharge end of the main body 11 , so that the gas in the first sub-channel 112 can act on the material after the first atomization after being rotated and accelerated by the first dispersing member 122 .

[0110] The first dispersion member 122 is provided with a plurality of flow holes 123, each of which is arranged to penetrate along the axial direction of the first sub-channel 112, and each of which is arranged to extend in a counterclockwise direction. In other words, each of the flow holes 123 is arranged to bend and extend in a counterclockwise direction, and when the gas in the first sub-channel 112 passes through the corresponding flow hole 123, it can be rotated and accelerated in a counterclockwise direction.

[0111] Through the above structure, the medium in the first subchannel 112 can smoothly pass through each flow hole 123, and rotate and accelerate along the second rotation direction under the guidance of the flow hole 123, so as to better frictionally shear the small droplets after the first atomization and realize the second atomization of the material.

[0112] In some embodiments, the atomization channel also includes a second sub-channel 113 arranged around the outer periphery of the first sub-channel 112, and the nozzle 12 also includes a second dispersion component 124 connected to the main body 11, and the second dispersion component 124 is used to rotationally accelerate the medium in the second sub-channel 113 along the first rotation direction so that the medium after rotational acceleration can impact the material to cause it to be atomized for a third time.

[0113] Specifically, the second sub-channel 113 is arranged around the outer circumference of the first sub-channel 112 , that is, the material channel 111 , the first sub-channel 112 and the second sub-channel 113 are arranged in sequence along the radial direction of the material channel 111 .

[0114] The second dispersing member 124 is a structure that can further disperse the material after the first atomization or the second atomization to further atomize it. The second dispersing member 124 is connected to the main body 11 and is connected to the discharge end of the main body 11. The second dispersing member 124 can be connected to the main body 11 by, but not limited to, a clamping connection or a screw connection.

[0115] The medium in the second sub-channel 113 may be gas. The gas is accelerated in rotation in a clockwise direction under the action of the second dispersing member 124. The accelerated gas frictionally shears the material and atomizes it for the third time.

[0116] The rotational acceleration direction of the gas in the second subchannel 113 is opposite to that of the gas in the first subchannel 112, so that the material can be better atomized to form material particles with smaller particle size under the action of shear forces in two different directions.

[0117] Through the above structure, the medium in the second sub-channel 113 can be rotated and accelerated under the action of the second dispersing element 124, and the material can be frictionally sheared to complete the third atomization. In addition, since the rotation acceleration direction of the medium in the second sub-channel 113 is opposite to the rotation acceleration direction of the medium in the first sub-channel 112, the shearing effect of both on the material can be further enhanced, thereby improving the atomization effect.

[0118] like Figure 1 , Figure 6 as well as Figure 7 As shown, in some embodiments, in the preset direction a, the second dispersing member 124 has a connecting end 125 and an outlet end 126 that are arranged opposite to each other, the connecting end 125 is connected to the discharge end of the main body 11, the second dispersing member 124 is sleeved on the outer periphery of the first dispersing member 122, and the outlet end 126 is arranged around the outlet periphery of the liquid guiding tube 1211. The second dispersing member 124 and the liquid guiding tube 1211 enclose a first material passage cavity 127, and the first material passage cavity 127 is used to accommodate the medium after being accelerated by the first dispersing member 122.

[0119] Specifically, in the preset direction a, that is, along the axial direction of the material channel 111, the second dispersing member 124 has a connecting end 125 and an outlet end 126, and the connecting end 125 is connected to the material discharge end of the main body 11, so that the second dispersing member 124 can be fixed on the main body 11. The second dispersing member 124 is sleeved on the outer periphery of the first dispersing member 122, and the outlet end 126 of the second dispersing member 124 is arranged around the outer periphery of the outlet of the liquid guiding tube 1211.

[0120] Furthermore, the second dispersing member 124 and the liquid guiding tube 1211 enclose a first material passage cavity 127. After the gas in the first subchannel 112 is accelerated by rotation through the first dispersing member 122, it is ejected from the flow hole 123 of the first dispersing member 122, then enters the first material passage cavity 127, and then is ejected from the outlet end 126 of the second dispersing member 124. In this way, after the material is atomized for the first time in the material channel 111, it is ejected from the outlet of the liquid guiding tube 1211. At the same time, after the gas in the first subchannel 112 is accelerated by rotation through the first dispersing member 122, it is ejected from the outlet end 126 of the second dispersing member 124, so that the material at the outlet of the liquid guiding tube 1211 can be atomized for the second time.

[0121] Through the above structure, in addition to rotationally accelerating the medium in the second sub-channel 113, the second dispersing element 124 can also gather the medium in the first sub-channel 112, so that the medium in the first sub-channel 112 can better frictionally shear the material after the first atomization after rotational acceleration, thereby completing the second atomization of the material.

[0122] In some embodiments, in a direction perpendicular to the preset direction a, the diameter of the second dispersing element 124 gradually decreases from the connecting end 125 to the outlet end 126 .

[0123] Specifically, in a direction perpendicular to the axial direction of the material channel 111, that is, along the radial direction of the material channel 111, the diameter of the second dispersing member 124 gradually decreases from the connecting end 125 to the outlet end 126. In other words, the second dispersing member 124 is configured as a conical structure.

[0124] In this way, the medium in the first material transfer chamber 127 can be better gathered so that it can act intensively on the material after the first atomization, thereby improving the effect of the second atomization.

[0125] In some embodiments, the nozzle 12 further includes an outer cover 128, which is connected to the discharge end of the main body 11 and is disposed on the outer periphery of the second dispersing member 124. The outer cover 128 has an injection port 1281 disposed on the outer periphery of the outlet end 126. A second material passage cavity 1282 is formed between the outer cover 128 and the second dispersing member 124, and the second material passage cavity 1282 is respectively connected to the second sub-channel 113 and the injection port 1281.

[0126] Specifically, the outer cover 128 can be connected to the discharge end of the main body 11 by means of snap connection or screw connection, and in addition, the outer cover 128 is arranged on the outer periphery of the second dispersing member 124 to protect the second dispersing member 124, and a second material passage cavity 1282 is formed between the outer cover 128 and the second dispersing member 124. The outer cover 128 has an injection port 1281, and the injection port 1281 is arranged around the outer periphery of the outlet end 126 of the second dispersing member 124.

[0127] The gas in the second subchannel 113 enters the second material passage chamber 1282 after being rotated and accelerated by the second dispersing member 124, and then moves along the second material passage chamber 1282 and finally ejects from the ejection port 1281. While ejecting, the material ejected from the ejection hole 1214 can be frictionally sheared to achieve the third atomization.

[0128] It should be noted that the gases in the first subchannel 112 and the second subchannel 113 can perform friction shearing on the material in sequence or simultaneously. In other words, the second atomization and the third atomization can be performed in sequence with a short interval between them or simultaneously. The specific adjustment can be made according to the needs in the actual production process, which will not be elaborated here.

[0129] Through the above structure, the outer cover 128 can provide protection for the second dispersing element 124, and can form a second material transfer chamber 1282 for gas to pass through between the outer cover 128 and the second dispersing element 124, so that the gas in the second sub-channel 113 can be smoothly ejected from the injection port 1281 through the second material transfer chamber 1282 and act on the material to achieve the third atomization of the material.

[0130] In some embodiments, a plurality of fins 1241 are protrudingly disposed on the outer periphery of the second dispersing member 124 , and each fin 1241 is extended along the first rotation direction.

[0131] Specifically, a plurality of fins 1241 are protruded from the outer circumference of the third dispersing member, and the fins 1241 are evenly spaced apart along the circumference of the second dispersing member 124 .

[0132] Among them, each fin 1241 is extended in the clockwise direction, so that the gas in the second sub-channel 113 can be ejected from the gap between each two adjacent fins 1241, and during the ejection process, it is guided by the fins 1241 on both sides and rotates and accelerates in the clockwise direction to better perform friction shear on the material.

[0133] In some embodiments, in a plane perpendicular to the preset direction a, the angle θ between two adjacent fins 1241 ranges from 30° to 50°.

[0134] Specifically, in a plane perpendicular to the preset direction a, that is, in a cross section of the second dispersing member 124 , the angle between two adjacent fins 1241 is set to be 30° to 50°.

[0135] As a specific embodiment, the angle between two adjacent fins 1241 can be set to 40°. Of course, it can also be set to other degrees. It can be adjusted according to actual production conditions and will not be elaborated here.

[0136] Setting the angle between two adjacent fins 1241 to the above range enables the fins 1241 to cooperate with the flow holes 123 on the first dispersing member 122 to form a reverse angle therebetween, so that the directions of the two airflows are opposite, thereby better atomizing the material.

[0137] like Figure 1 and Figure 8 As shown, in some embodiments, the outer cover 128 is movably disposed on the main body 11 along a preset direction a to adjust a distance D between the injection port 1281 and the outlet end 126 in the preset direction a.

[0138] Specifically, the outer cover 128 can be arranged on the main body 11 by means of threaded connection, and the outer cover 128 can be rotated to move the outer cover 128 relative to the main body 11 along the axial direction of the material channel 111. When the outer cover 128 is away from the main body 11, the distance between the injection port 1281 and the outlet end 126 increases, and at this time, the volume of the second material passage cavity 1282 between the outer cover 128 and the second dispersion member 124 increases, so that the gas consumption in the second sub-channel 113 increases, and the particle size of the material particles after the third atomization is smaller.

[0139] On the contrary, when the outer cover 128 is close to the main body 11, the distance between the injection port 1281 and the outlet end 126 is reduced. At this time, the volume of the second material passage chamber 1282 between the outer cover 128 and the second dispersion element 124 is reduced, so that the gas consumption in the second sub-channel 113 is reduced, and the particle size of the material particles after the third atomization is larger.

[0140] As a specific embodiment, the moving distance of the outer cover 128 in the preset direction a can be set to 1 mm to 15 mm. By moving the outer cover 128 in the preset direction a, the particle size of the material particles after the third atomization can be fine-tuned, further improving the accuracy of the particle size and improving the atomization effect.

[0141] Please see Fig. 9Based on the same concept as the above-mentioned sprayer 10, the present application also provides a spray drying system 100, including a feed assembly 20, an air supply assembly 30 and a spray drying device, the spray drying device including a drying chamber 80 and at least one sprayer 10 as described above, the sprayer 10 is used to spray atomized material particles into the drying chamber. The feed assembly 20 is connected to the feed end of the material channel 111 in the sprayer 10 for providing material, and the air supply assembly 30 is connected to each atomization channel respectively for providing a medium.

[0142] Specifically, the spray drying device may include one or more sprayers 10, and the discharge end of each sprayer 10 is disposed in the drying chamber 80. Thus, each sprayer 10 sprays the atomized material particles into the drying chamber 80, and the material particles are dried in the drying chamber 80 to evaporate the water inside or on the surface of the material particles, and finally obtain the powder required for production.

[0143] It should be noted that each sprayer 10 is provided with a corresponding air intake pipe and a feed pipe, wherein the feed pipe is communicated with the inlet of the material channel 111 of the corresponding sprayer 10, and the air intake pipe is communicated with the inlet of the atomization channel of the corresponding sprayer 10. In this way, the pressurized material can be input into the material channel 111 through the feed pipe, and the pressurized gas is passed into the corresponding atomization channel through the air intake pipe, thereby realizing the atomization of the material.

[0144] In addition, the material supply assembly 20 can be connected to the feed pipe, that is, connected to the feed end of the material channel 111 through the feed pipe, so as to realize the material delivery into the material channel 111. The gas supply assembly 30 can be connected to the air intake pipe, that is, connected to the air intake port of the corresponding atomization channel through the air intake pipe, so as to deliver gas into the corresponding atomization channel.

[0145] like Fig.10 As shown, in some embodiments, the feed assembly 20 includes at least two feed lines, each of which is connected to the material channel 111, and each includes a material tank 21, a diaphragm pump 22, a safety valve 23 and a discharge barrel 24. The material tank 21 is connected to the material channel 111 through a pipeline, and the diaphragm pump 22 is arranged on the pipeline between the material tank 21 and the material channel 111, and is used to pressurize the material in the pipeline. The safety valve 23 is connected between the material tank 21 and the discharge barrel 24, and is used to open when the pressure between the material tank 21 and the material channel 111 reaches a preset value, and discharge the pressurized material into the discharge barrel 24.

[0146] First, the feeding assembly 20 includes at least two feeding lines, each of which can realize feeding to the sprayer 10. In this way, for materials with special properties such as strong heat sensitivity and high viscosity, if a material blockage occurs in one feeding line, the material can be immediately fed through another feeding line, so that continuous production can be realized and production efficiency can be improved.

[0147] Secondly, each feeding line includes a material tank 21, a diaphragm pump 22, a safety valve 23 and a discharge barrel 24. The material tank 21 refers to a structure that can be used to store materials so as to provide the materials inside to the sprayer 10. The diaphragm pump 22 is arranged between the material tank 21 and the material channel 111. The diaphragm pump 22 can pressurize the material delivered to the material channel 111 so that the pressurized material can be smoothly atomized for the first time in the material channel 111.

[0148] The inlet of the safety valve 23 is connected to the pipeline between the material tank 21 and the material channel 111, and the outlet of the safety valve 23 is connected to the discharge barrel 24. Under normal circumstances, the safety valve 23 is in a closed state, at which time, the material is transported from the material tank 21 to the material channel 111.

[0149] For materials with strong heat sensitivity and high viscosity, material blockage is prone to occur. When material blockage occurs, after continuous pressurization by the diaphragm pump 22, the pressure between the material tank 21 and the material channel 111 gradually increases, and finally reaches a preset value, for example, 10MPa. At this time, the pressure continues to increase, and the safety valve 23 switches from a closed state to an open state, connecting the material tank 21 with the discharge barrel 24, so that the material can be discharged into the discharge barrel 24, thereby achieving pressure relief between the material tank 21 and the material channel 111.

[0150] The above structure can not only realize continuous material feeding and improve production efficiency, but also can release pressure in time when material blockage occurs, thus ensuring the smooth progress of the production process.

[0151] In some embodiments, the spray drying system 100 further includes a dehumidification component (not shown in the figure), which is connected to the spray drying device and is used to control the air humidity in the drying chamber 80.

[0152] Specifically, the dehumidification component can control the air humidity in the drying chamber 80, wherein the dehumidification component can be, but is not limited to, configured as a rotary dehumidifier.

[0153] By providing a dehumidification component, the humidity of the air entering the drying chamber 80 can be better controlled, thereby improving the drying efficiency of the material particles in the drying chamber 80 .

[0154] In some embodiments, the spray drying system 100 further includes a heating component (not shown in the figure), which is connected to the spray drying device and is used to control the temperature in the drying chamber 80 .

[0155] Specifically, the heating component can control the temperature of the air entering the drying chamber 80, and can also control the ambient temperature in the drying chamber 80. In this way, the temperature in the drying chamber 80 can be kept balanced, so that the material particles can be cooled down quickly in the drying chamber 80, thereby improving the drying efficiency.

[0156] Furthermore, the heating component can be, but is not limited to, an electric heater. Through the above structure, the temperature balance in the drying chamber 80 can be better controlled, so that the material particles in the drying chamber 80 can be better cooled down quickly, thereby improving the drying efficiency.

[0157] like Fig. 9 and Fig.11 As shown, in some embodiments, the spray drying system 100 further includes an air sweeping assembly 40 , which is disposed on the inner wall of the drying chamber 80 and is used to blow drying air toward the inner wall of the drying chamber 80 .

[0158] Specifically, the air sweep assembly 40 may include an air supply member and an air blowing pipe, wherein the air supply member is connected to the air blowing pipe and delivers gas into the air blowing pipe. The air blowing pipe may be disposed in the drying chamber 80, and a plurality of air blowing holes may be provided on the air blowing pipe, and the air blowing holes may be disposed toward the inner wall of the drying chamber 80. In this way, the gas may be blown out from each air blowing hole and blown to the inner wall of the drying chamber 80, thereby reducing the probability of the material adhering to the inner wall of the drying chamber 80.

[0159] Furthermore, the air blowing duct may be movably arranged along the circumference of the drying chamber 80 , that is, the air blowing duct may perform a circular motion around the drying chamber 80 , so as to blow air to the inner wall of the drying chamber 80 more comprehensively.

[0160] It should be noted that, when blowing dry air toward the inner wall of the drying chamber 80 , a dehumidifier may be provided on the air sweeping assembly 40 to dehumidify the blown gas to ensure the dryness of the gas.

[0161] Through the above structure, the inner wall of the drying chamber 80 is continuously purged, which can reduce the probability of materials sticking to the inner wall of the drying chamber 80, thereby reducing the probability of material blockage and improving the drying efficiency.

[0162] In some embodiments, the spray drying system 100 further includes a cooling jacket 50 , which is sleeved on the outer circumference of the drying chamber 80 .

[0163] Specifically, a cooling medium, such as low-temperature gas, may be introduced into the cooling jacket 50 to further cool the cavity wall of the drying cavity 80 and reduce the probability of the material sticking to the wall due to high temperature.

[0164] In some embodiments, the spray drying system 100 also includes an air supply component 60 and a material receiving component 70. The material receiving component 70 is connected to the discharge port of the drying chamber 80 and is used to receive the material that has been dried. The air supply component 60 is arranged between the discharge port of the drying chamber 80 and the material receiving component 70, and is used to provide dry cold air blown from the discharge port of the drying chamber 80 to the material receiving component 70.

[0165] Specifically, the receiving assembly 70 is a structure that is connected to the discharge port of the drying chamber 80 and is used to receive the dried material. The air supply assembly 60 is disposed at the discharge port of the drying chamber 80, and the air supply assembly 60 blows dry cold air in the direction from the discharge port of the drying chamber 80 to the receiving assembly 70.

[0166] Thus, on the one hand, the air supply component 60 can speed up the material transportation from the material outlet of the drying chamber 80 to the material receiving component 70, thereby improving the material receiving efficiency; on the other hand, the dry cold air can quickly cool the material during the transportation process.

[0167] like Fig.12 As shown, based on the same concept as the above-mentioned spray drying system 100, the present application also provides a control method of the spray drying system 100, which is used to control the above-mentioned spray drying system, and the control method comprises the steps of:

[0168] S10: The pressurized material is input into the material channel 111 of the sprayer 10 , and the material is atomized for the first time after being accelerated by rotation in the material channel 111 .

[0169] Specifically, while the material tank 21 conveys the material into the material channel 111 , the material is pressurized by the diaphragm pump 22 , so that the pressurized material can rotate and accelerate in the material channel 111 , and then be sprayed out from the spray hole 1214 of the spray piece 1213 to achieve the first atomization.

[0170] S20: inputting gas into the atomization channel, the gas impacts the material after the first atomization after rotation acceleration, and atomizes the material for the second time.

[0171] Gas is input into the atomization channel. After being accelerated by rotation, the gas meets the material after the first atomization at the position of the ejection hole 1214 and frictionally shears the material after the first atomization, thereby achieving the second atomization of the material.

[0172] S30: inputting gas into the atomization channel, the gas is accelerated by rotation and impacts the material after the second atomization, and atomizes the material for the third time.

[0173] After the second atomization, gas is input into the atomization channel. After being accelerated by rotation, the gas also meets the material after the first or second atomization near the ejection hole 1214, and the third atomization of the material is achieved.

[0174] S40: The material after three atomizations is transported to the drying chamber 80 for drying. After the material is atomized three times, it forms material particles of target particle size, which are sprayed into the drying chamber 80 by the sprayer 10, and dried in the drying chamber 80 to evaporate the water inside or on the surface of the material particles, and finally form dry powder.

[0175] S50: Collecting the dried material. The dried material is transported to the material collecting assembly 70 for storage to facilitate transportation or subsequent use.

[0176] In some embodiments, step S10 specifically includes:

[0177] The material is accelerated in rotation along the first rotation direction in the material channel 111 and is atomized for the first time.

[0178] The material is accelerated in clockwise rotation under the guidance of the guide groove 1215 on the guide member 1212, and then is extruded and sprayed out through the spray hole 1214 to disperse into small droplets, thereby achieving the first atomization.

[0179] In some embodiments, in step S20, specifically including:

[0180] A high-pressure gas at a first temperature is input into the first subchannel 112, and the high-pressure gas at the first temperature rotates and accelerates along a second rotation direction, and impacts the material after the first atomization, and atomizes it for the second time. The second rotation direction is opposite to the first rotation direction.

[0181] Specifically, the first sub-channel 112 is arranged around the outer periphery of the material channel 111, and a high-pressure gas of a first temperature is input into the first sub-channel 112, wherein the first temperature is room temperature or low temperature, that is, a high-pressure gas of room temperature or low temperature is input into the first sub-channel 112, and the gas rotates and accelerates in a counterclockwise direction, and then frictionally shears the small droplets after the first atomization, so that the small droplets are further atomized into small droplets, thereby realizing the second atomization of the material.

[0182] In some embodiments, step S30 specifically includes:

[0183] High-pressure gas at a second temperature is input into the second subchannel 113, and the high-pressure gas at the second temperature rotates and accelerates along the first rotation direction, and impacts the material after the second atomization, and atomizes it for the third time; wherein the second temperature is higher than the first temperature.

[0184] Specifically, the second subchannel 113 is arranged around the outer periphery of the first subchannel 112, and high-pressure gas at a second temperature is input into the second subchannel 113, wherein the second temperature is higher than the first temperature, that is, the second temperature is high temperature. The high-temperature and high-pressure gas rotates and accelerates in a clockwise direction to frictionally shear the material after the second atomization, thereby achieving the third atomization of the material.

[0185] Thus, high temperature and high pressure gas is introduced into the second sub-channel 113, and when the gas contacts the material, the material can be dried instantly. Meanwhile, the first sub-channel 112 is located between the material channel 111 and the second sub-channel 113, and the low temperature or normal temperature gas inside the first sub-channel 112 can play an isolating role, reducing the long-term contact between the high temperature gas and the material.

[0186] Furthermore, after the high-temperature and high-pressure gas in the second subchannel 113 achieves instant drying of the material, the air volume and air temperature in the drying chamber 80 can be reduced accordingly, that is, the drying chamber 80 can be kept at a relatively low constant temperature without heating for drying. In this way, the probability of the material sticking and thus blocking in the drying chamber 80 can be reduced, and the drying efficiency of the material in the drying chamber 80 can be effectively improved.

[0187] In some embodiments, in step S40, specifically including:

[0188] S41: Control the humidity and temperature of the air in the drying chamber 80.

[0189] S42 : Blowing dry air toward the inner wall of the drying chamber 80 .

[0190] S43: conveying cooling medium into the cooling jacket 50 on the outer periphery of the drying chamber 80.

[0191] Specifically, when the material particles are being dried in the drying chamber 80, the humidity and temperature of the air in the drying chamber 80 are controlled by the dehumidification component and the heating component, so that the material can be dried better and the drying efficiency is improved.

[0192] In some embodiments, step S50 further includes the following steps:

[0193] Dry cold air is blown from the material outlet of the drying chamber 80 toward the material receiving assembly 70 .

[0194] Specifically, by blowing dry cold air to the dried material through the air supply component 60, on the one hand, the material conveying speed is increased and the material collection efficiency is improved, and on the other hand, the material can be quickly cooled during the conveying process.

[0195] According to one or more embodiments, when the spray drying system 100 provided in the present application is used, the material is atomized at least three times in the sprayer 10, which can effectively improve the atomization efficiency and make the particle size after atomization smaller. In addition, since the high-temperature and high-pressure gas is introduced into the second sub-channel 113, and the normal temperature or low-temperature and high-pressure gas is introduced into the first sub-channel 112, the high-temperature and high-pressure gas is dried instantly when it contacts the material after the second atomization. In this way, part of the water in the material particles can be evaporated during the atomization process, completing the drying of the material particles to a certain extent.

[0196] Furthermore, the amount of water that needs to be evaporated from the material particles in the drying chamber 80 after atomization is completed is reduced, so a lower temperature can be set in the drying chamber 80, and the material particles in the drying chamber 80 are dried faster.

[0197] After drying, the material particles can reach the current particle size and are transported to the material receiving assembly 70 for storage. In this process, the material particles can be blown with dry cold air through the air supply assembly 60, which can not only speed up the material receiving speed, but also quickly cool the material during transportation.

[0198] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0199] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A sprayer, suitable for conveying materials and atomizing the materials, characterized in that: include: A main body, wherein a material channel and an atomization channel are provided inside the main body, wherein the material channel is used to convey the material, and the atomization channel is used to convey a medium, and at the outlet of the material channel, the medium impacts the material and atomizes the material at least twice; and A nozzle, which is arranged at the discharge end of the main body and is connected to the material channel and the atomization channel respectively; The nozzle includes an atomizer, which includes a liquid guide tube, a flow guide and a spray plate. The atomizer is connected to the outlet of the material channel. The inlet of the liquid guide tube is communicated with the material channel. The flow guide is arranged in the liquid guide tube and is located near the outlet of the liquid guide tube. The spray plate is arranged at the outlet of the liquid guide tube. Among them, a guide groove is opened on the outer periphery of the guide member, and the guide groove is bent along the first rotation direction and extended along the axial direction of the material channel. The spray hole connected to the material channel is penetrated by the spray plate, and the aperture of the spray hole is smaller than the outlet of the liquid guide tube.

2. The sprayer according to claim 1, characterized in that The atomization channel includes a first sub-channel arranged around the periphery of the material channel, and the nozzle also includes a first dispersing member connected to the main body, the first dispersing member is used to rotate and accelerate the medium in the first sub-channel along a second rotation direction, so that the medium after rotation acceleration can impact the material to atomize it for a second time; Wherein, the second rotation direction is opposite to the first rotation direction.

3. The sprayer according to claim 2, characterized in that The first dispersing member is connected to the discharge end of the main body, and a plurality of flow holes penetrating along a preset direction are formed on the first dispersing member, each of the flow holes is communicated with the first sub-channel and extends along the second rotation direction.

4. The sprayer according to claim 2, characterized in that The atomization channel also includes a second sub-channel arranged around the outer periphery of the first sub-channel, and the nozzle also includes a second dispersing member connected to the main body, and the second dispersing member is used to rotationally accelerate the medium in the second sub-channel along the first rotation direction so that the medium after rotational acceleration can impact the material to cause it to be atomized for a third time.

5. The sprayer according to claim 4, characterized in that In a preset direction, the second dispersing member has a connecting end and an outlet end that are arranged opposite to each other, the connecting end is connected to the discharge end of the main body, the second dispersing member is sleeved on the outer periphery of the first dispersing member, and the outlet end is arranged around the outer periphery of the outlet of the liquid guiding tube; The second dispersing member and the liquid guiding tube enclose a first material transfer cavity, and the first material transfer cavity is used to accommodate the medium that has been accelerated by the first dispersing member.

6. The sprayer according to claim 5, characterized in that In a direction perpendicular to the preset direction, the diameter of the second dispersing member gradually decreases from the connecting end to the outlet end.

7. The sprayer according to claim 5, characterized in that The nozzle also includes an outer cover, which is connected to the discharge end of the main body and is arranged on the outer periphery of the second dispersing member, and the outer cover has a spray port arranged around the outer periphery of the outlet end; Wherein, a second material transfer cavity is formed between the outer cover and the second dispersing member, and the second material transfer cavity is communicated with the second sub-channel and the injection port respectively.

8. The sprayer according to claim 7, characterized in that A plurality of fins are protruding from the outer periphery of the second dispersing member, and each of the fins is extended along the first rotation direction.

9. The sprayer according to claim 8, characterized in that In a plane perpendicular to the preset direction, the angle between two adjacent fins is in the range of 30° to 50°.

10. The sprayer according to claim 7, characterized in that The outer cover is movably disposed on the main body along the preset direction to adjust the distance between the injection port and the outlet end in the preset direction.

11. A spray drying system, characterized in that: It comprises a feed assembly, an air supply assembly and a spray drying device, wherein the spray drying device comprises a drying chamber and at least one sprayer according to any one of claims 1 to 10, wherein the sprayer is used to spray atomized material particles into the drying chamber; The material supply assembly is communicated with the feed end of the material channel in the sprayer for providing material, and the air supply assembly is communicated with each of the atomization channels respectively for providing a medium.

12. The spray drying system according to claim 11, characterized in that The feeding assembly includes at least two feeding lines, each of which is connected to the material channel and includes a material tank, a diaphragm pump, a safety valve and a discharge barrel. The material tank is connected to the material channel through a pipeline. The diaphragm pump is arranged on the pipeline between the material tank and the material channel to pressurize the material in the pipeline. The safety valve is connected between the material tank and the discharge barrel, and is used to open when the pressure between the material tank and the material channel reaches a preset value, and discharge the pressurized material into the discharge barrel.

13. The spray drying system according to claim 11, characterized in that: The spray drying system further comprises a dehumidification component, which is connected to the spray drying device and is used to control the air humidity in the drying chamber.

14. The spray drying system according to claim 11, characterized in that: The spray drying system further comprises a heating component, which is connected to the spray drying device and is used to control the temperature in the drying chamber.

15. The spray drying system according to claim 11, characterized in that: The spray drying system further comprises an air sweeping assembly, which is arranged on the inner wall of the drying chamber and is used for blowing drying air toward the inner wall of the drying chamber.

16. The spray drying system according to claim 11, characterized in that The spray drying system further comprises a cooling jacket, which is sleeved on the outer circumference of the drying chamber.

17. The spray drying system according to claim 11, characterized in that The spray drying system also includes an air supply component and a material receiving component. The material receiving component is connected to the discharge port of the drying chamber and is used to receive the dried material. The air supply component is arranged between the discharge port of the drying chamber and the material receiving component and is used to provide dry cold air blown from the discharge port of the drying chamber to the material receiving component.

18. A control method for a spray drying system, characterized in that: Used to control the spray drying system according to any one of claims 11 to 17, the control method comprises the steps of: The pressurized material is input into the material channel of the sprayer, and the material is atomized for the first time after being accelerated by rotation in the material channel; Gas is input into the atomization channel, and after being accelerated by rotation, the gas impacts the material after the first atomization, and atomizes the material for the second time; The gas is input into the atomization channel, and after being accelerated by rotation, the gas impacts the material after the second atomization, and atomizes the material for the third time; The material after three times of atomization is transported to the drying chamber for drying; Collect the materials after drying.

19. The control method according to claim 18, characterized in that: The step of inputting pressurized material into the material channel of the sprayer, and performing the first atomization of the material after rotational acceleration in the material channel specifically includes: The material is accelerated in rotation along a first rotation direction in the material channel and is atomized for the first time.

20. The control method according to claim 19, characterized in that: The step of inputting gas into the atomization channel, the gas impacting the material after the first atomization after rotation acceleration, and atomizing the material for the second time specifically includes: High-pressure gas at a first temperature is input into the first subchannel, and the high-pressure gas at the first temperature rotates and accelerates along a second rotation direction, and impacts the material after the first atomization, and atomizes it for the second time; wherein the second rotation direction is opposite to the first rotation direction.

21. The control method according to claim 20, characterized in that: The step of inputting gas into the atomization channel, the gas impacting the second atomized material after rotation acceleration, and atomizing the material for the third time specifically includes: A high-pressure gas at a second temperature is input into the second sub-channel, the high-pressure gas at the second temperature rotates and accelerates along the first rotation direction, and impacts the material after the second atomization, and atomizes it for the third time; wherein the second temperature is higher than the first temperature.

22. The control method according to claim 18, characterized in that: The step of conveying the material after three times of atomization to the drying chamber for drying specifically includes: Controlling the humidity and temperature of the air in the drying chamber; Blowing dry air toward the inner wall of the drying chamber; A cooling medium is conveyed into a cooling jacket on the periphery of the drying chamber.

23. The control method according to claim 18, characterized in that: The step of collecting the dried material also includes the following steps: Dry cold air is blown toward the material receiving assembly from the material outlet of the drying chamber.

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