Rapid powder drying and selecting machine
By designing a rapid powder drying and classifying machine, and utilizing vibrating sieving and hot air drying technologies, the problem of crystal destruction in high specific surface area calcium hydroxide during sieving was solved, achieving automated deagglomeration and classification, and improving the sieving effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUILIN GUIQIANG MACHINERY
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-05
AI Technical Summary
Existing technologies for processing high specific surface area calcium hydroxide often result in sieving methods that damage the crystal structure of the product, leading to poor depolymerization, drying, and powder classification, which in turn affects the powder properties.
A rapid powder drying and classifying machine is adopted, including a feeding mechanism, a drying and screening mechanism, and a classification and collection mechanism. Through vibrating screening and hot air drying, it automatically detects moisture and classifies and collects high specific surface area calcium hydroxide with different particle sizes.
This technology enables automated depolymerization and classification of high specific surface area calcium hydroxide, ensuring that product quality is not compromised while improving the accuracy and efficiency of screening.
Smart Images
Figure CN224195243U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of powder drying and grading technology, and specifically relates to a rapid powder drying and classifying machine. Background Technology
[0002] Screening high specific surface area calcium hydroxide (Ca(OH)2) is a key process step. Its purpose is to classify the material according to particle size or morphology to meet the needs of different applications (such as catalysis, adsorption, and composite material preparation). Because high specific surface area calcium hydroxide particles are typically fine (micrometer or nanometer scale) and prone to agglomeration, it is necessary to dry, deagglomerate, and disperse the agglomerated particles to fully utilize their high activity and strong adsorption properties, meeting the demands for high-efficiency materials in environmental protection, chemical engineering, and other fields.
[0003] Currently, the screening method for high specific surface area calcium hydroxide is to process it using an integrated flash evaporation and grinding machine. However, this method will damage the crystal form of the product, resulting in poor depolymerization, drying, and powder classification effects, which will have a significant impact on the properties of the powder itself. Utility Model Content
[0004] The purpose of this invention is to provide a rapid powder drying and classifying machine that can dry powder containing moisture and collect it by screening different particle sizes, with a high degree of automation.
[0005] The specific technical solution is as follows:
[0006] A rapid powder drying and classifying machine, comprising:
[0007] The feeding mechanism is connected to the drying and screening mechanism. The feeding mechanism is used to detect the moisture content of the powder and to feed the powder containing moisture into the drying and screening mechanism.
[0008] The drying and screening mechanism includes a screening chamber, a vibrating screening mechanism, and a hot air blower. The screening chamber has a first inlet and a first outlet. The first inlet is connected to the feeding mechanism, and the first outlet is connected to a first material collection container. The vibrating screening mechanism is installed inside the screening chamber, which is equipped with a heat source interface. The hot air blower is connected to the heat source interface through a hot air duct. An airlock device and an air volume compensation device are installed at the first outlet.
[0009] The grading and collection mechanism is connected to the screening chamber and is used to collect and classify powders of different qualities.
[0010] The induced draft fan is connected to the graded collection mechanism.
[0011] Preferably, the feeding mechanism includes a feeding hopper and a screw conveyor. The feeding hopper has a second inlet and a second outlet, and the screw conveyor has a third inlet and a third outlet. The second inlet is used to feed powder containing moisture, and the feeding hopper is equipped with a moisture detection module. The second outlet is connected to the third inlet, and the third outlet is connected to the first inlet.
[0012] Preferably, the screening chamber has a first compartment and a second compartment, a first inlet and a first outlet are located at the top and bottom of the first compartment, respectively, a vibrating screening mechanism is located inside the first compartment, a heat source interface is located at the bottom of the first compartment, and a connecting port is provided between the first compartment and the second compartment, and the vibrating screening mechanism is connected to the connecting port.
[0013] Preferably, the vibrating screening mechanism includes a first screening component, a second screening component, and a third screening component. The first screening component, the second screening component, and the third screening component are distributed from top to bottom between the first feed inlet and the first discharge outlet, with three connecting ports. The first screening component, the second screening component, and the third screening component are respectively connected to the three connecting ports. The second compartment is provided with a first collection area, a second collection area, and a third collection area. The first collection area, the second collection area, and the third collection area are respectively corresponding to the three connecting ports. The first collection area, the second collection area, and the third collection area are not interconnected. The first collection area, the second collection area, and the third collection area are all connected to the grading collection mechanism. Each of the three connecting ports is provided with an opening and closing door.
[0014] Preferably, the first screening component includes a first vibrating screen, which is inclined and has its outlet at the lowest point within the first compartment. The screen mesh size of the first vibrating screen is 200 mesh.
[0015] Preferably, the second screening section includes a second vibrating screen, which is inclined and has its outlet at the lowest point within the first compartment. The screen mesh size of the second vibrating screen is 150 mesh.
[0016] Preferably, the third screening section includes a third vibrating screen with a screen mesh size of 100 mesh, the third vibrating screen is inclined, the outlet of the third vibrating screen is the lowest in the first compartment, and the outlet of the third vibrating screen is connected to a communication port.
[0017] Preferably, a fourth vibrating screen is provided between the first vibrating screen and the first feed inlet. The screen mesh number of the fourth vibrating screen is greater than 200 mesh, and the inclination direction of the fourth vibrating screen is opposite to that of the first vibrating screen.
[0018] Preferably, the graded collection mechanism includes a collection hopper, an intermediate chamber, an upper adsorption hood, an exhaust pipe, and a bag filter. The collection hopper is connected to the bottom of the intermediate chamber, the side wall of the intermediate chamber is connected to three connecting ports, the upper adsorption hood is connected to the top of the intermediate chamber, the bag filter is connected to the top of the upper adsorption hood through a pipe, and the bag filter is connected to an exhaust fan through an exhaust pipe.
[0019] Compared with existing technologies, this utility model has the following beneficial effects:
[0020] The powder rapid drying and classifying machine of this invention can automatically break up and deagglomerate high specific surface area calcium hydroxide, and classify the dried high specific surface area calcium hydroxide powder according to different qualities. It has a high degree of automation and will not damage the product quality. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0022] Figure 1 This is a schematic diagram of the structure of this utility model.
[0023] Figure 2 This is a top view of the present invention.
[0024] Explanation of key figure labels:
[0025] 1 is the feeding mechanism, 11 is the feeding hopper, 12 is the screw conveyor, 2 is the drying and screening mechanism, 21 is the first material collection container, 22 is the first interval chamber, 23 is the second interval chamber, 24 is the third vibrating screen, 25 is the second vibrating screen, 26 is the first vibrating screen, 27 is the fourth vibrating screen, 28 is the third collection area, 29 is the second collection area, 30 is the first collection area, 3 is the grading collection mechanism, 31 is the intermediate chamber, 32 is the upper adsorption hood, 33 is the bag filter, 34 is the collection hopper, 4 is the induced draft fan, and 41 is the induced draft pipe. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.
[0030] like Figure 1-2 As shown in the figure, this embodiment provides a rapid powder drying and classifying machine, comprising:
[0031] The controller can be an existing microcontroller or PLC controller.
[0032] Feeding mechanism 1 is connected to drying and screening mechanism 2. Feeding mechanism 1 is used to detect the moisture content of the powder and feed the powder containing moisture into drying and screening mechanism 2. Feeding mechanism 1 includes a feeding hopper 11 and a screw conveyor 12. The feeding hopper 11 has a second inlet and a second outlet, and the screw conveyor 12 has a third inlet and a third outlet. The second inlet is used to put in the powder containing moisture. A moisture detection module is installed inside the feeding hopper 11. The second outlet is connected to the third inlet, and the third outlet is connected to the first inlet. The moisture detection module can use an existing moisture analyzer to measure the moisture content and then send the result to the controller. The controller controls the power of the hot air blower and the induced draft fan 4 according to the moisture content.
[0033] The drying and screening mechanism 2 includes a screening chamber, a vibrating screening mechanism, and a hot air blower. The screening chamber has a first inlet and a first outlet. The first inlet is connected to the feeding mechanism 1, and the first outlet is connected to a first material collection container 21. The vibrating screening mechanism is located inside the screening chamber, which is equipped with a heat source interface. The hot air blower is connected to the heat source interface through a hot air pipe. An airlock device and an airflow compensation device are installed at the first outlet. The airlock device adopts an existing counterweight valve mechanism to isolate the first outlet from the outside environment, preventing outside air from entering the screening chamber when the classifier is working. When the collected powder reaches a certain weight... After the classifier or separator stops, the counterweight valve mechanism is opened to discharge the powder. The air volume compensation device adopts the existing volute compensation mechanism, with a regulating valve on the volute. The valve opening size is adjusted according to the actual production situation to adjust the amount of outside cold air entering the screening chamber. The screening chamber has a first compartment 22 and a second compartment 23. The first inlet and the first outlet are located at the top and bottom of the first compartment 22, respectively. The vibrating screening mechanism is located inside the first compartment 22, and the heat source interface is located at the bottom of the first compartment 22. A connecting port is provided between the first compartment 22 and the second compartment 23, and the vibrating screening mechanism is connected to the connecting port. The temperature of the hot air blown by the hot air blower is 150-250℃.
[0034] The vibrating screening mechanism includes a first screening component, a second screening component, and a third screening component. The first screening component, the second screening component, and the third screening component are distributed from top to bottom between the first feed inlet and the first discharge outlet, with three connecting ports. The first screening component, the second screening component, and the third screening component are connected to the three connecting ports respectively. The second compartment 23 is provided with a first collection area 30, a second collection area 29, and a third collection area 28. The first collection area 30, the second collection area 29, and the third collection area 28 correspond to the three connecting ports respectively. The first collection area 30, the second collection area 29, and the third collection area 28 are not interconnected. The first collection area 30, the second collection area 29, and the third collection area 28 are all connected to the grading collection mechanism 3. Each of the three connecting ports is provided with an opening and closing door. By sieving high specific surface area calcium hydroxide of different particle sizes into different areas, it is beneficial for the subsequent induced draft fan 4 to adsorb the high specific surface area calcium hydroxide of the corresponding particle size for further sieving. If the induced draft fan 4 cannot adsorb the high specific surface area calcium hydroxide of the corresponding power, it means that the high specific surface area calcium hydroxide of that part needs to be sieved again. Therefore, the setting of the first collection area 30, the second collection area 29 and the third collection area 28, as well as the intermediate chamber 31 and the collection hopper 34 can further ensure the accuracy of sieving high specific surface area calcium hydroxide.
[0035] The first screening component includes a first vibrating screen 26, which is inclined and has its outlet at the lowest point within the first compartment 22. The screen mesh number of the first vibrating screen 26 is 200 mesh.
[0036] The second screening section includes a second vibrating screen 25, which is inclined and has its outlet at the lowest point within the first compartment 22. The screen mesh number of the second vibrating screen 25 is 150 mesh.
[0037] The third screening section includes a third vibrating screen 24 with a screen mesh size of 100 mesh. The third vibrating screen 24 is inclined and its outlet is the lowest point within the first compartment 22. The outlet of the third vibrating screen 24 is connected to a communication port.
[0038] A fourth vibrating screen 27 is also provided between the first vibrating screen 26 and the first feed inlet. The screen mesh of the fourth vibrating screen 27 is greater than 200 mesh, and the inclination direction of the fourth vibrating screen 27 is opposite to that of the first vibrating screen 26. It should be noted that the outlet of the fourth vibrating screen 27 is connected to the first discharge port, thereby screening the larger-sized high-density calcium hydroxide particles into the first material collection container 21. Ball milling, high-speed shearing, or air jet milling can be used to break the large-sized agglomerates into monodisperse particles. Then, the particles are placed into the feeding mechanism 1 for drying and screening to obtain the desired high-density calcium hydroxide.
[0039] The first vibrating screen 26, the second vibrating screen 25, the third vibrating screen 24 and the fourth vibrating screen 27 mentioned above are all existing mechanical vibrating screens. Based on the reciprocating rotational vibration generated by the vibrator, the screen surface produces periodic movement, thereby realizing the separation and screening of materials.
[0040] The first vibrating screen 26, the second vibrating screen 25, the third vibrating screen 24 and the fourth vibrating screen 27 mentioned above can effectively screen the high specific surface area calcium hydroxide within the target range, which is beneficial for subsequent automated collection by the induced draft fan 4.
[0041] By tilting the first vibrating screen 26, the second vibrating screen 25, the third vibrating screen 24 and the fourth vibrating screen 27, the high specific surface area calcium hydroxide with different particle sizes screened out is transported to the corresponding areas.
[0042] The grading and collection mechanism 3 is connected to the screening chamber and is used to collect and classify powders of different qualities. The grading and collection mechanism 3 includes a collection hopper 34, an intermediate chamber 31, an upper adsorption hood 32, an exhaust pipe 41, and a bag filter 33. The collection hopper 34 is connected to the bottom of the intermediate chamber 31, the side wall of the intermediate chamber 31 is connected to three connecting ports, the upper adsorption hood 32 is connected to the top of the intermediate chamber 31, the bag filter 33 is connected to the top of the upper adsorption hood 32 through a pipe, and the bag filter 33 is connected to the exhaust fan 4 through the exhaust pipe 41. By setting up a graded collection mechanism 3, when the induced draft fan 4 is started, it adsorbs high specific surface area calcium hydroxide of different particle sizes located in the first collection area 30, the second collection area 29, and the third collection area 28. For example, if it is necessary to collect 200-mesh high specific surface area calcium hydroxide in the first collection area 30, the induced draft fan 4 starts at the corresponding power to adsorb 200-mesh high specific surface area calcium hydroxide, allowing the 200-mesh high specific surface area calcium hydroxide to enter the intermediate chamber 31. Since the air force is delivered from the top of the upper adsorption hood 32, when the 200-mesh high specific surface area calcium hydroxide enters the intermediate chamber 31, due to gravity, high specific surface area calcium hydroxide larger than 200 mesh will fall into the collection hopper 34, which plays a role in further precise screening, while high specific surface area calcium hydroxide that meets the 200-mesh requirement enters the bag filter dust collector 33 for collection. The screening process for high specific surface area calcium hydroxide of other particle sizes is the same as the process exemplified above, and will not be elaborated here, thus achieving the classified collection of high specific surface area calcium hydroxide of different particle sizes.
[0043] The induced draft fan 4 is connected to the graded collection mechanism 3. The induced draft fan 4 is the existing induced draft fan 4, which will not be described in detail here. The induced draft fan 4 turns on different power according to the adsorption of different masses of high specific surface area calcium hydroxide, thereby realizing the collection of high specific surface area calcium hydroxide of different masses.
[0044] It should be noted that the above-mentioned high specific surface area calcium hydroxide with different particle sizes refers to high specific surface area calcium hydroxide with different masses.
[0045] Moisture-containing materials enter the screening chamber for rapid drying. Simultaneously, any agglomerated particles are non-destructively de-agglomerated by a vibrating screening mechanism, preserving particle size and other characteristics. The dispersed material is then sorted by a grading and collection mechanism 3, undergoing a first collection in an intermediate chamber and a second collection in a pulse bag filter 33, ensuring the exhaust gas meets national emission standards. Connected to a high-temperature induced draft fan, the exhaust gas passes through a silencer before being discharged outdoors. This novel rapid powder drying and classifying machine can dry and screen moisture-containing powders to collect particles of different sizes, offering a high degree of automation.
[0046] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A rapid powder drying and classifying machine, characterized in that, include: The feeding mechanism is connected to the drying and screening mechanism. The feeding mechanism is used to detect the moisture content of the powder and to feed the powder containing moisture into the drying and screening mechanism. The drying and screening mechanism includes a screening chamber, a vibrating screening mechanism, and a hot air blower. The screening chamber has a first inlet and a first outlet. The first inlet is connected to the feeding mechanism, and the first outlet is connected to a first material collection container. The vibrating screening mechanism is installed inside the screening chamber, which is equipped with a heat source interface. The hot air blower is connected to the heat source interface through a hot air duct. An airlock device and an air volume compensation device are installed at the first outlet. The grading and collection mechanism is connected to the screening chamber and is used to collect and classify powders of different qualities. The induced draft fan is connected to the graded collection mechanism.
2. The powder rapid drying and classifying machine according to claim 1, characterized in that, The feeding mechanism includes a feeding hopper and a screw conveyor. The feeding hopper has a second inlet and a second outlet, and the screw conveyor has a third inlet and a third outlet. The second inlet is used to feed powder containing moisture, and the feeding hopper is equipped with a moisture detection module. The second outlet is connected to the third inlet, and the third outlet is connected to the first inlet.
3. The powder rapid drying and classifying machine according to claim 1, characterized in that, The screening chamber has a first compartment and a second compartment. The first inlet and the first outlet are located at the top and bottom of the first compartment, respectively. The vibrating screening mechanism is located inside the first compartment. The heat source interface is located at the bottom of the first compartment. A connecting port is provided between the first compartment and the second compartment. The vibrating screening mechanism is connected to the connecting port.
4. The powder rapid drying and classifying machine according to claim 1, characterized in that, The vibrating screening mechanism includes a first screening component, a second screening component, and a third screening component. The first screening component, the second screening component, and the third screening component are distributed from top to bottom between the first feed inlet and the first discharge outlet, with three connecting ports. The first screening component, the second screening component, and the third screening component are connected to the three connecting ports respectively. The second compartment is provided with a first collection area, a second collection area, and a third collection area. The first collection area, the second collection area, and the third collection area are respectively connected to the three connecting ports. The first collection area, the second collection area, and the third collection area are not interconnected. The first collection area, the second collection area, and the third collection area are all connected to the grading collection mechanism. Each of the three connecting ports is equipped with an opening and closing door.
5. A rapid powder drying and classifying machine according to claim 4, characterized in that, The first screening component includes a first vibrating screen, which is inclined and has its outlet at the lowest point within the first compartment. The screen mesh size of the first vibrating screen is 200 mesh.
6. A rapid powder drying and classifying machine according to claim 4, characterized in that, The second screening section includes a second vibrating screen, which is inclined and has its outlet at the lowest point within the first compartment. The screen mesh size of the second vibrating screen is 150 mesh.
7. A rapid powder drying and classifying machine according to claim 4, characterized in that, The third screening section includes a third vibrating screen with a screen mesh size of 100 mesh. The third vibrating screen is inclined and its outlet is the lowest point within the first compartment. The outlet of the third vibrating screen is connected to a communication port.
8. A rapid powder drying and classifying machine according to claim 5, characterized in that, A fourth vibrating screen is also provided between the first vibrating screen and the first feed inlet. The screen mesh of the fourth vibrating screen is greater than 200 mesh, and the inclination direction of the fourth vibrating screen is opposite to that of the first vibrating screen.
9. A rapid powder drying and classifying machine according to claim 4, characterized in that, The graded collection mechanism includes a collection hopper, an intermediate chamber, an upper adsorption hood, an exhaust duct, and a bag filter. The collection hopper is connected to the bottom of the intermediate chamber, and the side wall of the intermediate chamber is connected to three connecting ports. The upper adsorption hood is connected to the top of the intermediate chamber. The bag filter is connected to the top of the upper adsorption hood through a pipe, and the bag filter is connected to the exhaust fan through the exhaust duct.