A multifunctional pneumatic flow spray type drying system

Abstract

This invention relates to the field of drying equipment technology and discloses a multifunctional airflow spray drying system, comprising: a drying tower, in which a liquid chamber, a drying chamber, and a dust chamber are formed, arranged from top to bottom; a baffle frame disposed within the drying chamber, on which a filter cloth is mounted; and ventilation openings located above the baffle frame on the inner wall of the drying chamber. The intermittent operation of the release component, by stopping the atomizing nozzles and hot air output, prevents dust backflow and agglomeration, thereby improving powder particle size uniformity and flowability. A preheating function enhances the liquid atomization effect, ensuring uniform spraying and preventing uneven distribution. The overall design, through optimization of each component, reduces the risk of powder-liquid contact, improving powder quality and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, and more specifically to a multifunctional airflow spray drying system. Background Technology

[0002] With the deepening of protein science research and the continuous growth of people's demand for protein products, functional proteins such as gluten, collagen, and feather meal protein are increasingly widely used in food, medicine, cosmetics, and feed. These proteins have special nutritional functions and bioactivity, which can meet diverse market demands.

[0003] These functional proteins typically exist in the form of solutions, suspensions, or emulsions because uniform protein distribution through dissolution or dispersion is necessary during extraction and processing. Liquid protein feedstocks not only offer advantages in concentration control but also facilitate the addition of stabilizers, antioxidants, or other auxiliary components to enhance their stability and functionality. However, liquid proteins are inconvenient to store and have high moisture content, which can easily lead to deterioration or reduced activity. Therefore, spray drying transforms these liquid materials into stable powder forms, providing an efficient and practical solution.

[0004] In spray drying, nozzles are typically positioned at the top of the drying tower. Liquid material is atomized into fine droplets by the spray system and diffuses downwards with the airflow. Simultaneously, hot air is introduced into the tower, contacting the sprayed droplets and rapidly evaporating the moisture to form a dry powder. As evaporation continues, the droplets shrink in size, ultimately leaving behind components such as proteins, carbohydrates, and fats. The dried powder moves downwards with the airflow and eventually settles at the bottom of the drying tower.

[0005] However, during spray drying, the dried powder may come into contact with the sprayed liquid, which can adversely affect the quality of the final product. Specifically, the dried powder is prone to agglomeration after reabsorbing liquid, leading to uneven particle size, reduced flowability, and ultimately poor drying efficiency. This situation mainly arises because the powder in the drying chamber is not promptly removed. When too much powder accumulates in the chamber, it may remain suspended in the airflow or fall back into the area still being sprayed, coming into contact with newly sprayed liquid droplets. Furthermore, the continuous operation of hot air and liquid atomization can cause turbulent airflow within the chamber, preventing the dried powder from quickly settling or entering the dust collection area, thus increasing the likelihood of powder contact with the liquid. These factors collectively affect the efficiency of the spray drying process and the quality of the final product. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a multifunctional airflow spray drying system, which aims to alleviate the aforementioned problems to at least some extent.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0008] A multifunctional airflow spray drying system includes:

[0009] A drying tower, wherein a liquid chamber, a drying chamber and a dust chamber are formed inside the drying tower, and the three are arranged from top to bottom;

[0010] A baffle frame is installed inside the drying chamber, and a filter cloth is provided on the baffle frame. A ventilation opening is provided on the inner wall of the drying chamber, located above the baffle frame.

[0011] An annular tube is provided at the bottom of the barrier frame, and the annular tube is equipped with multiple atomizing nozzles;

[0012] A base is located at the bottom of the drying tower, and a hot air component for outputting hot air is provided inside the base;

[0013] A hot air duct is provided between the drying tower and the base to connect the hot air component and the drying chamber;

[0014] A release component located inside the drying tower is used to intermittently release dust from the drying chamber into the dust chamber. The release component can stop the output of the atomizing nozzle to the liquid when releasing dust.

[0015] A liquid conveying component located inside the drying tower is used to convey the liquid in the liquid chamber to the atomizing nozzle, and the liquid conveying component can preheat the liquid in the liquid conveying component;

[0016] The release component can also stop the hot air output from the drying chamber when releasing dust.

[0017] Preferably, the release component includes a rotating shaft rotatably connected inside the drying tower, a lead screw a is provided on the rotating shaft, the lead screw a is a reciprocating lead screw, a connecting frame is threadedly connected to the drying tower, the connecting frame has a communication port communicating with the hot air duct, a baffle is connected to the rotating shaft, and a sealing frame sleeved outside the baffle is connected to the bottom of the connecting frame.

[0018] Preferably, the liquid conveying component includes a liquid inlet connected to the top of the drying tower, the liquid inlet being connected to the liquid chamber, a baffle plate being connected inside the drying tower, the top of the rotating shaft extending into the liquid chamber and rotatably connected to the baffle plate, a connecting cavity being opened at the top of the rotating shaft, and a plurality of connecting pipes connected to the connecting cavity being connected to the annular pipe.

[0019] Preferably, the release component further includes a stop block slidably connected to the connecting cavity, the bottom of the stop block is connected to a connecting rod slidably connected to the rotating shaft, and a top platform is connected to the connecting rod.

[0020] Preferably, the liquid delivery component further includes an air pipe connected to the partition plate, a piston slidably connected inside the air pipe, a lead screw b rotatably connected to the air pipe, the lead screw b being a reciprocating lead screw, the piston being threadedly connected to the lead screw b, the top of the air pipe extending into the liquid cavity and having a through hole a, a baffle a covering the through hole a slidably connected to the top of the air pipe, a spring a connecting the baffle a and the air pipe, a through hole b opening at the top of the piston, a baffle b slidably connected to the piston covering the through hole b, and a spring b connecting the baffle b and the piston.

[0021] Preferably, a gear a is connected to the rotating shaft, and a gear b that meshes with the gear a is connected to the lead screw b.

[0022] Preferably, the top of the hot air duct is connected to a diversion pipe, the diameter of which is smaller than that of the hot air duct, and the bottom of the diversion pipe is provided with multiple air jets facing the filter cloth.

[0023] Preferably, the hot air component includes a heat pump disposed within the base, and the air outlet of the heat pump is connected to the hot air duct.

[0024] Preferably, a motor is connected to the top of the base, and the drive shaft of the motor is connected to the rotating shaft.

[0025] Preferably, the outer wall of the drying tower is provided with a release port, and the release port is provided with a cover plate.

[0026] In summary, the present invention has the following main beneficial effects:

[0027] By employing a layered structure with liquid, drying, and dust chambers, liquid atomization, hot air drying, and dust collection are achieved in separate zones, thereby improving drying efficiency and powder quality. The barrier frame and its filter cloth effectively filter some dust and optimize airflow distribution within the drying chamber. Multiple atomizing nozzles uniformly atomize the liquid, and preheating by the liquid delivery components further enhances atomization efficiency and drying speed. A bottom hot air component provides stable heat, ensuring rapid moisture evaporation. The intermittent operation of the release component, by stopping the atomizing nozzles and hot air output, prevents dust backflow and agglomeration, thus improving powder particle size uniformity and flowability. The preheating function enhances liquid atomization, ensuring uniform spraying and preventing uneven distribution. The overall design, through optimization of each stage, reduces the risk of powder-liquid contact, improving powder quality and production efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the drying tower structure of the present invention;

[0030] Figure 3 yes Figure 2 Enlarged schematic diagram of the local structure at point A;

[0031] Figure 4 This is a schematic diagram of the sealing frame structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the barrier frame structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the annular tube structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the tracheal structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the piston structure of the present invention;

[0036] Figure 9 yes Figure 2 A magnified view of the local structure at point B.

[0037] Figure label:

[0038] 100. Drying tower; 101. Liquid chamber; 102. Drying chamber; 103. Dust chamber; 104. Barrier frame; 105. Filter cloth; 106. Ventilation port; 107. Circular pipe; 108. Atomizing nozzle; 109. Base; 110. Hot air duct;

[0039] 200. Rotating shaft; 201. Lead screw a; 202. Connecting frame; 203. Connecting port; 204. Baffle; 205. Sealing frame;

[0040] 300. Liquid inlet; 301. Partition; 302. Connecting cavity; 303. Connecting pipe;

[0041] 400. Stop block; 401. Connecting rod; 402. Top platform;

[0042] 500, Air tube; 501, Piston; 502, Lead screw b; 503, Through hole a; 504, Baffle a; 505, Spring a; 506, Through hole b; 507, Baffle b; 508, Spring b; 509, Gear a; 510, Gear b;

[0043] 600. Diverter pipe; 601. Heat pump; 602. Motor; 603. Release port; 604. Cover plate; 605. Natural gas tank; 606. Delivery pipe; 607. Valve; 608. Electric spark igniter; 609. Manifold; 610. Return pipe. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] refer to Figures 1-9 A multifunctional airflow spray drying system, comprising:

[0046] The drying tower 100 has a liquid chamber 101, a drying chamber 102 and a dust chamber 103, which are arranged from top to bottom.

[0047] A baffle 104 is installed inside the drying chamber 102, and a filter cloth 105 is provided on the baffle 104. A ventilation opening 106 is provided on the inner wall of the drying chamber 102, located above the baffle 104.

[0048] An annular tube 107 is located at the bottom of the barrier frame 104, and multiple atomizing nozzles 108 are provided on the annular tube 107.

[0049] A base 109 is located at the bottom of the drying tower 100, and a hot air component for outputting hot air is provided inside the base 109;

[0050] A hot air duct 110 is provided between the drying tower 100 and the base 109 to connect the hot air component and the drying chamber 102.

[0051] A release component installed in the drying tower 100 is used to intermittently release dust from the drying chamber 102 into the dust chamber 103. The release component can stop the output of liquid from the atomizing nozzle 108 when releasing dust.

[0052] A liquid conveying component installed in the drying tower 100 is used to convey the liquid in the liquid chamber 101 to the atomizing nozzle 108. The liquid conveying component can preheat the liquid in the liquid conveying component.

[0053] Among them, the release component can also stop the hot air output from the drying chamber 102 when releasing dust;

[0054] By setting up a top-down layered structure of liquid chamber 101, drying chamber 102, and dust chamber 103, functional zones for liquid atomization, hot air drying, and dust collection are achieved, improving drying efficiency and powder quality. The baffle frame 104 and its filter cloth 105 effectively filter some dust particles, preventing them from rising with the hot air, thereby optimizing the airflow distribution within the drying chamber 102. Multiple atomizing nozzles 108 arranged on the annular pipe 107 achieve uniform liquid atomization, and, in conjunction with the liquid conveying component, preheat the liquid, further improving atomization efficiency and drying speed. The bottom hot air component delivers hot air to the drying chamber 102 through the hot air duct 110, providing a stable heat source to ensure that the liquid droplets can quickly evaporate moisture to form powder. The intermittent operation of the release component allows for timely release of dust from the drying chamber 102 into the dust chamber 103 during spray drying. Specifically, during the intermittent operation of the release component, the output of the atomizing nozzle 108 and hot air is stopped synchronously, avoiding dust backflow or agglomeration problems that may be caused by continued liquid spraying and continuous hot air input during dust release. This design ensures that the dust in the drying chamber 102 does not come into contact with liquid droplets during the release process, thereby further improving the particle size uniformity and flowability of the powder. In the design, by controlling the periodic operation of the output of the atomizing nozzle 108 and hot air, the output of liquid and hot air can be stopped in time after the liquid is atomized and fully dried into powder, while automatically releasing the powder in the drying chamber 102 into the powder chamber. This intermittent operation mode effectively avoids excessive accumulation of powder in the drying chamber 102, preventing it from coming into contact with liquid droplets due to excessive powder or forming agglomeration due to uneven distribution of local hot air. In addition, timely emptying of the drying chamber 102 by releasing dust can also ensure that the working environment in the drying chamber 102 is continuously in the optimal state, thereby improving the overall drying efficiency and ensuring the stability of powder particle size uniformity and flowability. Furthermore, the preheating function of the liquid conveying components further improves the liquid atomization effect by heating the liquid to a suitable temperature before it enters the atomizing nozzle 108, resulting in more uniform liquid droplet size and reducing the prolonged drying time caused by excessively low initial liquid temperature. Multiple atomizing nozzles 108 distributed on the annular tube 107 can cover the entire cross-section of the drying chamber 102, ensuring that the liquid is not unevenly distributed or concentrated during spraying. The various components of the overall design work together, significantly reducing the risk of powder contact with liquid after drying and preventing agglomeration through functional zoning of the layered structure, airflow optimization, improved atomization and drying efficiency, and timely powder release and cleaning. This not only improves the uniformity and flowability of the powder but also enhances the operational stability and production efficiency of the equipment, meeting the production requirements of high-quality powder products.

[0055] As a further embodiment of the present invention, the release component includes a rotating shaft 200 rotatably connected to the drying tower 100, a lead screw a201 provided on the rotating shaft 200, the lead screw a201 being a reciprocating lead screw, a connecting frame 202 slidably connected to the drying tower 100 being threaded on the lead screw a201, a connecting port 203 communicating with the hot air duct 110 being provided on the connecting frame 202, a baffle 204 being connected on the rotating shaft 204, and a sealing frame 205 sleeved on the baffle 204 being connected to the bottom of the connecting frame 202;

[0056] By setting the connecting port 203, in the initial state, the connecting port 203 is connected to the hot air duct 110, and hot air can enter the drying chamber 102 through the connecting port 203. In application, the rotating shaft 200 can be rotated, and the rotation of the rotating shaft 200 can move the connecting frame 202 upward through the lead screw a201. At the same time, the connecting port 203 and the sealing frame 205 will also gradually move upward. When the connecting frame 202 moves upward to the preset position, the connecting port 203 and the hot air duct 110 can be misaligned, and the sealing frame 205 can leave the baffle 204. At this time, the dried powder in the drying chamber 102 can fall into the powder chamber, and the entry of hot air will be stopped, avoiding the release of hot air to dry the powder. Furthermore, since the rotating shaft 200 is continuously rotating, for the portion of dried powder falling onto the baffle 204 in the drying chamber 102, when the sealing frame 205 leaves the baffle 204 and the baffle 204 rotates with the rotating shaft 200, centrifugal force can be used to smoothly detach the powder from the baffle 204 and allow it to fall into the powder chamber. Furthermore, by setting the lead screw a201 as a reciprocating lead screw, the sealing frame 205 can be intermittently released from or attached to the baffle 204, thereby achieving the function of timed powder release.

[0057] As a further embodiment of the present invention, the liquid conveying component includes a liquid inlet 300 connected to the top of the drying tower 100, the liquid inlet 300 being connected to the liquid chamber 101, a partition 301 being connected inside the drying tower 100, the top of the rotating shaft 200 extending into the liquid chamber 101 and being rotatably connected to the partition 301, a connecting cavity 302 being opened at the top of the rotating shaft 200, and a plurality of connecting pipes 303 connected to the connecting cavity 302 being connected to the annular pipe 107;

[0058] By providing the inlet 300, the liquid to be dried can be introduced into the liquid chamber 101 during application. The liquid can be evenly distributed onto the annular pipe 107 via the connecting chamber 302. Multiple connecting pipes 303 on the annular pipe 107, connected to the connecting chamber 302, can evenly deliver the liquid to the atomizing nozzle 108, ensuring uniform spray distribution within the drying tower 100 and preventing overly concentrated or sparse liquid spraying. Furthermore, the annular pipe 107 is connected to the rotating shaft 200 via the connecting pipes 303. When the rotating shaft 200 rotates, the rotation of the shaft causes the annular pipe 107 and the atomizing nozzle 108 to rotate along the circumference of the shaft 200, ensuring that the atomizing nozzle 108 evenly covers the area of ​​the drying chamber 102. This design not only ensures uniform distribution of the liquid to the nozzles but also produces a continuous atomization effect as the nozzles rotate. This rotational motion makes the spray more uniform, avoiding overly concentrated or uneven liquid spraying. When the atomizing nozzle 108 rotates around the rotating shaft 200, it can achieve a highly efficient liquid atomization and drying process, further improving drying efficiency and product quality.

[0059] As a further embodiment of the present invention, the release component also includes a stop 400 slidably connected to the connecting cavity 302, the bottom of the stop 400 is connected to a connecting rod 401 slidably connected to the rotating shaft 200, and a top platform 402 is connected to the connecting rod 401.

[0060] By setting a stop 400, the thickness of which is greater than the diameter of the connecting pipe 303, the stop 400 is initially positioned below the connecting pipe 303. When the rotating shaft 200 and the lead screw a201 rotate to move the connecting frame 202 upward to close the hot air duct 110, the connecting frame 202 touches the top platform 402 simultaneously, causing the top platform 402 to move the stop 400 via the connecting rod 401. This allows the stop 400 to close the connecting pipe 303, thereby stopping the liquid delivery. This avoids the situation where the atomizing nozzle 108 continues to spray liquid after the hot air supply is stopped when releasing powder. By synchronously stopping the liquid delivery, it is ensured that the liquid does not come into contact with the drying powder during the drying process, thus preventing excessive liquid spraying and powder agglomeration, and ensuring the drying quality and particle size uniformity of the powder.

[0061] As a further embodiment of the present invention, the liquid conveying component further includes an air pipe 500 connected to the partition plate 301, a piston 501 slidably connected inside the air pipe 500, a lead screw b502 rotatably connected to the air pipe 500, the lead screw b502 being a reciprocating lead screw, the piston 501 being threadedly connected to the lead screw b502, the top of the air pipe 500 extending into the liquid chamber 101 and having a through hole a503, a baffle a504 covering the through hole a503 slidably connected to the top of the air pipe 500, a spring a505 connecting the baffle a504 and the air pipe 500, a through hole b506 opening at the top of the piston 501, a baffle b507 covering the through hole b506 slidably connected to the piston 501, and a spring b508 connecting the baffle b507 and the piston 501;

[0062] By configuring the air pipe 500 and piston 501, a one-way valve mechanism can be formed by the through hole a503, baffle a504, and spring a505 on the air pipe 500. Similarly, a one-way valve mechanism can be formed by the through hole b506, baffle b507, and spring a505 on the piston 501. In application, after filling the liquid chamber 101 to a suitable level, the inlet 300 is closed. When the liquid is transported to the annular pipe 107 and the atomizing nozzle 108 sprays atomized droplets, the lead screw b502 can be rotated to cause the piston 501 to reciprocate up and down within the air pipe 500. During this process, the up-and-down movement of the piston 501 will activate the one-way valve mechanism. Gas is then transported into the liquid chamber 101, thereby pressurizing the liquid chamber 101. By pressurizing the liquid chamber 101, sufficient pressure is ensured within it, providing adequate airflow support to guarantee that the atomizing nozzle 108 can effectively spray the physicochemical liquid. This pressurization design enhances the uniformity and stability of the spray, improves spray drying efficiency, and ensures the quality and particle size uniformity of the final powder product. Furthermore, the air pipe 500 is mounted on the partition 301, with its inlet corresponding to the positions of the baffle 104 and filter cloth 105. When the hot air exhausted during drying passes through the filter cloth 105 and reaches the vent 106, it also passes through the air pipe 500. As the piston 501 moves up and down, pushing the gas into the liquid chamber 101 to pressurize it, it also pushes hot air into the liquid chamber 101, heating the liquid. This process effectively raises the liquid temperature, providing the necessary heat for subsequent spray drying. The increased temperature within the liquid chamber 101 not only promotes liquid evaporation but also accelerates substance conversion, making the spray drying process more efficient.

[0063] As a further embodiment of the present invention, a gear a509 is connected to the rotating shaft 200, and a gear b510 that meshes with the gear a509 is connected to the lead screw b502.

[0064] By setting gear a509 to drive gear b510 to rotate when shaft 200 rotates, the lead screw b502 will rotate. This structure allows the lead screw b502 to reciprocate precisely through gear transmission, thereby driving the piston 501 in the air pipe 500 to move up and down.

[0065] As a further embodiment of the present invention, the top of the hot air duct 110 is connected to a diversion pipe 600, the diameter of the diversion pipe 600 is smaller than that of the hot air duct 110, and the bottom of the diversion pipe 600 is provided with multiple air jets facing the filter cloth 105.

[0066] By setting up a diversion pipe 600, when hot air enters the hot air duct 110, a portion of the hot air will enter the diversion pipe 600 and be blown onto the filter cloth 105 through the jet nozzles. Part of this hot air will be absorbed by the air pipe 500, which helps preheat the liquid. The hot air blown onto the filter cloth 105 can clean its surface to a certain extent, reducing powder accumulation. After the connecting frame 202 closes the hot air duct 110, all the hot air will enter the diversion pipe 600 and be evenly blown onto the surface of the filter cloth 105 through multiple jet nozzles. This effectively back-flushes the filter cloth 105, cleaning it and blowing off powder adhering to the bottom of the filter cloth 105, releasing it into the powder chamber. This prevents the filter cloth 105 from becoming clogged or its permeability reduced due to powder accumulation.

[0067] As a further aspect of the present invention, the hot air component includes a heat pump 601 disposed in the base 109, and the air outlet of the heat pump 601 is connected to the hot air duct 110.

[0068] By connecting the heat pump 601 to the hot air duct 110, the heat pump 601 can provide sufficient hot air flow to ensure that the air temperature and flow rate within the hot air duct 110 meet the requirements of the spray drying process. As a core component of the hot air system, the heat pump 601 can effectively control the hot air parameters required during the spray drying process by adjusting the airflow and temperature, thereby affecting the evaporation rate of the liquid and the quality of the powder. After being connected to the hot air duct 110, the heat pump 601 can continuously deliver hot air to various predetermined locations.

[0069] As a further embodiment of the present invention, a motor 602 is connected to the top of the base 109, and the drive shaft of the motor 602 is connected to the rotating shaft 200.

[0070] By setting up motor 602, motor 602 can provide driving force for the rotation of shaft 200.

[0071] As a further embodiment of the present invention, the outer wall of the drying tower 100 is provided with a release port 603, and a cover plate 604 is provided inside the release port 603.

[0072] By setting the release port 603, it is convenient for subsequent operators to remove the dried powder from the powder chamber.

[0073] As a further embodiment of the present invention, a natural gas tank 605 is provided on the drying tower 100, and a delivery pipe 606 is connected to the natural gas tank 605. One end of the delivery pipe 606 extends into the diversion pipe 600. A valve 607 is provided at one end of the delivery pipe 606 located in the natural gas tank 605. An electric spark igniter 608 corresponding to the delivery pipe 606 and extending into the diversion pipe 600 is connected to the side wall of the drying tower 100.

[0074] As a further embodiment of the present invention, the outer wall of the drying tower 100 is fitted with a collection pipe 609 that communicates with the vent 106, and the bottom of the collection pipe 609 is connected to a return pipe 610 that communicates with the base 109.

[0075] In this application, the spray drying system employs a combination of direct natural gas heating and heat pump 601 circulating heating to achieve a highly efficient and energy-saving heating process. A natural gas tank 605 is installed on the drying tower 100. The natural gas tank 605 is connected to a distribution pipe 600 via a delivery pipe 606. One end of the delivery pipe 606 is located at the natural gas tank 605 and is equipped with a valve 607 to control the flow and opening / closing of the natural gas. Simultaneously, an electric spark igniter 608, corresponding to the distribution pipe 600 and the delivery pipe 606, is installed on the side wall of the drying tower 100 to ignite the natural gas for combustion heating. The hot gas can enter the drying chamber 102 through the hot air duct 110 to heat the drying chamber 102. During the system startup phase, when the system temperature has not yet reached 100°C, natural gas combustion heating is used for rapid temperature rise, improving heating efficiency and saving energy. When the system temperature rises above 100°C, the system switches to heat pump 601 circulating heating mode. The high-temperature heat pump 601 can provide a maximum heating temperature of 140℃, fully meeting the 120℃ to 130℃ operating temperature requirement for spray drying, thus effectively reducing energy consumption. Furthermore, the outer wall of the drying tower 100 is fitted with a manifold 609 connected to the vent 106, and the bottom of the manifold 609 is connected to the base 109 via a return pipe 610. This design creates a closed-loop airflow within the drying tower 100, contributing to energy conservation and recovery. During the drying process, the dried water-containing airflow condenses into water in the low-temperature section of the heat pump 601, and the water is discharged through the exhaust pipe of the heat pump 601. Simultaneously, the heat pump 601 recovers the heat released during condensation for heating, further reducing energy consumption. The entire system is equipped with a filter cloth 105 to perform gas-solid separation on the airflow discharged from the drying tower 100, achieving efficient material collection. This heating method, combining rapid natural gas heating with circulating heating by the heat pump 601, not only improves the efficiency of spray drying but also significantly reduces energy consumption, ensuring stable final product quality and an economical and environmentally friendly drying process.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional airflow spray drying system, characterized in that, include: A drying tower (100) has a liquid chamber (101), a drying chamber (102) and a dust chamber (103) formed inside the drying tower (100), which are arranged from top to bottom; A barrier frame (104) is provided in the drying chamber (102), and a filter cloth (105) is provided on the barrier frame (104). A ventilation opening (106) is provided on the inner wall of the drying chamber (102), located above the barrier frame (104). An annular tube (107) is provided at the bottom of the barrier frame (104), and a plurality of atomizing nozzles (108) are provided on the annular tube (107). A base (109) is provided at the bottom of the drying tower (100), and a hot air component for outputting hot air is provided inside the base (109); A hot air duct (110) is provided between the drying tower (100) and the base (109) to connect the hot air component and the drying chamber (102). A release component located in the drying tower (100) is used to intermittently release dust from the drying chamber (102) into the dust chamber (103). The release component can stop the output of liquid from the atomizing nozzle (108) when releasing dust. A liquid conveying component located in the drying tower (100) is used to convey the liquid in the liquid chamber (101) to the atomizing nozzle (108). The liquid conveying component is capable of preheating the liquid in the liquid conveying component. The release component is capable of stopping the hot air output into the drying chamber (102) when releasing dust; The release component includes a rotating shaft (200) rotatably connected inside the drying tower (100), a lead screw a (201) on the rotating shaft (200), the lead screw a (201) being a reciprocating lead screw, a connecting frame (202) threadedly connected to the drying tower (100) on the lead screw a (201), a connecting port (203) connected to the hot air duct (110) on the connecting frame (202), a baffle (204) connected to the rotating shaft (200), and a sealing frame (205) sleeved on the baffle (204) connected to the bottom of the connecting frame (202). The liquid conveying component includes a liquid inlet (300) connected to the top of the drying tower (100), the liquid inlet (300) being connected to the liquid chamber (101), a partition (301) being connected inside the drying tower (100), the top of the rotating shaft (200) extending into the liquid chamber (101) and being rotatably connected to the partition (301), a connecting cavity (302) being opened at the top of the rotating shaft (200), and a plurality of connecting pipes (303) connected to the connecting cavity (302) being connected to the annular pipe (107). The release component also includes a stop (400) slidably connected to the connecting cavity (302), the bottom of the stop (400) is connected to a connecting rod (401) slidably connected to the rotating shaft (200), and a top platform (402) is connected to the connecting rod (401). The top of the hot air duct (110) is connected to a diversion pipe (600), the diameter of which is smaller than that of the hot air duct (110). The bottom of the diversion pipe (600) is provided with multiple air jets facing the filter cloth (105).

2. The multifunctional airflow spray drying system according to claim 1, characterized in that, The liquid conveying component also includes an air pipe (500) connected to the partition plate (301), a piston (501) slidably connected inside the air pipe (500), and a lead screw b (502) rotatably connected to the air pipe (500). The lead screw b (502) is a reciprocating lead screw, and the piston (501) is threaded onto the lead screw b (502). The top of the air pipe (500) extends into the liquid chamber (101) and has a through hole a (503). A baffle a (504) covering the through hole a (503) is slidably connected to the top of the tube (500). A spring a (505) is connected between the baffle a (504) and the air tube (500). A through hole b (506) is opened on the top of the piston (501). A baffle b (507) covering the through hole b (506) is slidably connected to the piston (501). A spring b (508) is connected between the baffle b (507) and the piston (501).

3. The multifunctional airflow spray drying system according to claim 2, characterized in that, Gear a (509) is connected to the rotating shaft (200), and gear b (510) that meshes with gear a (509) is connected to the lead screw b (502).

4. The multifunctional airflow spray drying system according to claim 1, characterized in that, The hot air component includes a heat pump (601) disposed in the base (109), and the air outlet of the heat pump (601) is connected to the hot air duct (110).

5. A multifunctional airflow spray drying system according to claim 2, characterized in that, A motor (602) is connected to the top of the base (109), and the drive shaft of the motor (602) is connected to the rotating shaft (200).

6. The multifunctional airflow spray drying system according to claim 1, characterized in that, The outer wall of the drying tower (100) is provided with a release port (603), and a cover plate (604) is provided inside the release port (603).

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