Multifunctional airflow spraying type drying system

Abstract

The invention relates to the technical field of drying equipment, and discloses a multifunctional airflow spray type drying system which comprises a drying tower, and a liquid cavity, a drying cavity and a dust cavity are formed in the drying tower and arranged from top to bottom; the blocking frame is arranged in the drying cavity, filter cloth is arranged on the blocking frame, a ventilation opening is formed in the inner wall of the drying cavity, and the ventilation opening is located above the blocking frame; the intermittent operation of the release part avoids dust backflow and agglomeration by stopping the atomization nozzle and hot air output, so that the particle size uniformity and flowability of the powder are improved. The liquid atomization effect is improved through the preheating function, it is ensured that spraying is uniform, and uneven distribution is prevented. According to the overall design, all links are optimized, the risk that powder makes contact with liquid is reduced, and the powder quality and the production efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, and in particular to a multifunctional airflow spray type drying system. Background Art

[0002] With the deepening of protein science research and the growing demand for protein products, functional proteins such as gluten, collagen and feather powder protein are increasingly used in food, medicine, cosmetics and feed. These proteins have special nutritional functions and biological activities and can meet diverse market needs.

[0003] These functional proteins usually exist in the form of solutions, suspensions or emulsions because during the extraction and processing, the protein needs to be evenly distributed by dissolving or dispersing. Liquid protein raw materials are not only easy to control the concentration, but also easy to add stabilizers, antioxidants or other auxiliary ingredients to improve their stability and functionality. However, liquid proteins are inconvenient to store and have a high moisture content, which can easily lead to deterioration or reduced activity. Therefore, converting these liquid materials into a stable powder form through spray drying has become an efficient and practical solution.

[0004] In the spray drying process, the nozzle is usually located above the drying tower. The liquid material is atomized into fine droplets through the spray system and diffused downward with the airflow. At the same time, hot air is introduced into the tower and contacts the sprayed droplets, which quickly evaporates the water and forms a dry powder. As the evaporation process proceeds, the droplet volume decreases, and finally leaves behind components such as protein, sugar, and fat. The dry powder moves downward with the airflow and finally settles to the bottom of the drying tower.

[0005] However, during the spray drying process, the dried powder may come into contact with the sprayed liquid, which will have an adverse effect on the quality of the final product. Specifically, the dried powder is prone to agglomeration after re-absorbing the liquid, resulting in uneven powder particle size, poor fluidity, and ultimately poor drying effect. This situation mainly occurs because the powder in the drying chamber is not discharged in time. When too much powder accumulates in the chamber, it may be suspended in the airflow or fall back to the area still being sprayed, and come into contact with the newly sprayed liquid droplets. In addition, the continuous operation of hot air and liquid atomization may cause turbulence in the airflow in the chamber, so that the dried powder fails to settle quickly or enter the dust collection area, thereby increasing the chance of powder contact with the liquid. These factors together affect the efficiency of the spray drying process and the quality of the final product. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a multifunctional airflow spray type drying system, aiming to alleviate the above problems at least to a certain extent.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A multifunctional airflow spray drying system, comprising:

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

[0010] An intercepting frame is arranged in the drying chamber, and a filter cloth is arranged on the intercepting frame. A vent is opened on the inner wall of the drying chamber and is located above the intercepting frame;

[0011] An annular tube disposed at the bottom of the blocking frame, wherein a plurality of atomizing nozzles are disposed on the annular tube;

[0012] A base is arranged at the bottom of the drying tower, wherein a hot air component for outputting hot air is arranged in the base;

[0013] A hot air duct provided between the drying tower and the base, for connecting the hot air component with the drying chamber;

[0014] A release component provided in the drying tower, used for intermittently releasing the dust in the drying chamber into the dust chamber, and the release component can stop the atomizing nozzle from outputting liquid when releasing the dust;

[0015] A liquid delivery component disposed in the drying tower, used to deliver the liquid in the liquid cavity to the atomizing nozzle, wherein the liquid delivery component can preheat the liquid in the liquid delivery component;

[0016] Wherein, the releasing component can stop the hot air output into the drying chamber when releasing the dust.

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

[0018] Preferably, the liquid conveying component includes a liquid inlet connected to the top of the drying tower, the liquid inlet is connected to the liquid cavity, a partition is connected inside the drying tower, the top of the rotating shaft extends into the liquid cavity and is rotatably connected to the partition, a connecting cavity is opened at the top of the rotating shaft, and a plurality of connecting tubes connected to the connecting cavity are connected to the annular tube.

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

[0020] Preferably, the liquid delivery component also includes an air pipe connected to the partition, a piston is slidably connected in the air pipe, a screw b is rotatably connected to the air pipe, the screw b is a reciprocating screw, the piston is threadedly connected to the screw b, the top of the air pipe extends into the liquid chamber and is provided with a through hole a, a baffle a covering the through hole a is slidably connected to the top of the air pipe, a spring a is connected between the baffle a and the air pipe, a through hole b is provided at the top of the piston, a baffle b covering the through hole b is slidably connected to the piston, and a spring b is connected between the baffle b and the piston.

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

[0022] Preferably, the top of the hot air duct is connected to a diverter pipe, the diameter of the diverter pipe is smaller than that of the hot air duct, and a plurality of air jets are provided at the bottom of the diverter pipe, and the air jets face the filter cloth.

[0023] Preferably, the hot air component comprises a heat pump disposed in the base, and an 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 a drive shaft of the motor is connected to the rotating shaft.

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

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

[0027] By setting up a layered structure of liquid chamber, drying chamber and dust chamber, liquid atomization, hot air drying and dust collection are realized in different zones, thereby improving drying efficiency and powder quality. The barrier frame and its filter cloth effectively filter part of the dust and optimize the airflow distribution in the drying chamber. Multiple atomizing nozzles evenly atomize the liquid, and the preheating of the liquid delivery components improves the atomization efficiency and drying speed. The bottom hot air component provides heat stably to ensure rapid evaporation of water. The intermittent operation of the release component stops the atomizing nozzle and hot air output to avoid dust backflow and agglomeration, thereby improving the uniformity and fluidity of powder particle size. The preheating function improves the liquid atomization effect, ensures uniform spraying and prevents uneven distribution. The overall design reduces the risk of contact between powder and liquid by optimizing each link, and improves powder quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0034] Figure 7 It is a schematic diagram of the trachea structure of the present invention;

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

[0036] Fig. 9 yes Figure 2 A magnified schematic diagram of the local structure at point B in the middle.

[0037] Reference numerals:

[0038] 100, drying tower; 101, liquid chamber; 102, drying chamber; 103, dust chamber; 104, blocking frame; 105, filter cloth; 106, vent; 107, annular 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, blocking frame;

[0040] 300, liquid inlet; 301, partition; 302, connecting cavity; 303, connecting pipe;

[0041] 400, stopper; 401, connecting rod; 402, top platform;

[0042] 500, air pipe; 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, shunt pipe; 601, heat pump; 602, motor; 603, release port; 604, cover plate; 605, natural gas tank; 606, delivery pipe; 607, valve; 608, spark igniter; 609, collecting pipe; 610, return pipe. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] refer to Figure 1-Figure 9 , a multifunctional airflow spray type drying system, comprising:

[0046] A drying tower 100 is formed with a liquid chamber 101, a drying chamber 102 and a dust chamber 103, which are arranged from top to bottom;

[0047] A blocking frame 104 is arranged in the drying chamber 102, and a filter cloth 105 is arranged on the blocking frame 104. A vent 106 is opened on the inner wall of the drying chamber 102, and is located above the blocking frame 104;

[0048] An annular tube 107 is disposed at the bottom of the blocking frame 104, and a plurality of atomizing nozzles 108 are disposed on the annular tube 107;

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

[0050] A hot air duct 110 disposed between the drying tower 100 and the base 109 is used to connect the hot air component with the drying chamber 102;

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

[0052] The liquid conveying component provided in the drying tower 100 is used to convey the liquid in the liquid chamber 101 to the atomizing nozzle 108, and the liquid conveying component can preheat the liquid in the liquid conveying component;

[0053] The release component can stop the hot air output into the drying chamber 102 when releasing the dust;

[0054] By setting up a top-down layered structure of the liquid chamber 101, the drying chamber 102 and the dust chamber 103, the functional division of liquid atomization, hot air drying and dust collection is realized, and the drying efficiency and powder quality are improved. The blocking frame 104 and the filter cloth 105 thereon can effectively filter some dust particles and prevent them from rising with the hot air, thereby optimizing the air flow distribution in the drying chamber 102. The multiple atomizing nozzles 108 arranged on the annular tube 107 can realize the uniform atomization of the liquid, and the liquid can be preheated by cooperating with the liquid conveying component to further improve the atomization efficiency and drying speed. The hot air component at the bottom conveys the 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 water to form powder. The intermittent operation of the release component can release the dust from the drying chamber 102 to the dust chamber 103 in time during the spray drying process. Specifically, when the release component is intermittently running, by synchronously stopping the output of the atomizing nozzle 108 and the hot air, the dust reflux or agglomeration problem that may be caused by the continuous spraying of liquid and the continuous input of hot air during the dust release is avoided. This design ensures that the dust in the drying chamber 102 will not contact with the liquid droplets during the release process, thereby further improving the particle size uniformity and fluidity of the powder. In the design, by controlling the periodic operation of the output of the atomizing nozzle 108 and the hot air, the output of the liquid and the hot air can be stopped in time after the liquid is atomized and fully dried into powder, and the powder in the drying chamber 102 is automatically released into the powder chamber. This intermittent operation mode effectively avoids excessive accumulation of powder in the drying chamber 102, prevents it from contacting with liquid droplets due to excessive powder or agglomerating due to uneven distribution of local hot air. In addition, by releasing dust and emptying the drying chamber 102 in time, it can also ensure that the working environment in the drying chamber 102 is continuously in the best state, thereby improving the overall drying efficiency and ensuring the stability of the powder particle size uniformity and fluidity. In addition, the preheating function of the liquid delivery component further improves the liquid atomization effect by heating the liquid to a suitable temperature before entering the atomizing nozzle 108, making the liquid droplet size more uniform, and also reducing the extended drying time caused by the initial low temperature of the liquid. The multiple atomizing nozzles 108 distributed on the annular tube 107 can cover the entire cross-section of the drying chamber 102, thereby ensuring that the liquid will not be unevenly distributed or concentrated during the spraying process. The various components of the overall design work together to significantly reduce the risk of powder contact with liquid after drying and avoid the occurrence of agglomeration through the functional zoning of the layered structure, airflow optimization, improvement of atomization and drying efficiency, and timely release and cleaning of powder. This not only improves the uniformity and fluidity of the powder particle size, but also improves the operating stability and production efficiency of the equipment, meeting the production needs of high-quality powder products.

[0055] As a further solution of the present invention, the release component includes a rotating shaft 200 rotatably connected to the drying tower 100, a lead screw a201 is provided on the rotating shaft 200, the lead screw a201 is a reciprocating lead screw, a connecting frame 202 slidably connected to the drying tower 100 is threadedly connected to the lead screw a201, a connecting port 203 connected to the hot air duct 110 is opened on the connecting frame 202, a baffle 204 is connected to the rotating shaft 200, and a blocking frame 205 sleeved outside the baffle 204 is connected to the bottom of the connecting frame 202;

[0056] By setting the connecting port 203, the connecting port 203 is connected with the hot air duct 110 in the initial state, and the hot air can enter the drying chamber 102 through the connecting port 203. When in use, the rotating shaft 200 can be rotated, and the rotation of the rotating shaft 200 can make the connecting frame 202 move upward through the screw a201, and at the same time, the connecting port 203 and the blocking frame 205 will gradually move upward. When the connecting frame 202 moves upward to a preset position, the connecting port 203 and the hot air duct 110 can be staggered, and the blocking 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 is stopped, thereby avoiding the hot air from releasing the powder and causing drying. In addition, since the rotating shaft 200 is rotating continuously, for the dried powder in the drying chamber 102 that falls onto the baffle 204, after the blocking frame 205 leaves the baffle 204, the baffle 204 rotates with the rotating shaft 200, and the centrifugal force can be used to make the powder smoothly detach from the baffle 204 and fall into the powder chamber. Furthermore, by setting the lead screw a201 as a reciprocating lead screw, the blocking frame 205 can be intermittently separated from or sleeved on the baffle 204, thereby realizing the function of releasing the powder at a fixed time.

[0057] As a further solution of the present invention, the liquid delivery component includes a liquid inlet 300 connected to the top of the drying tower 100, the liquid inlet 300 is connected to the liquid chamber 101, a partition 301 is connected to the drying tower 100, the top of the rotating shaft 200 extends into the liquid chamber 101, and is rotatably connected to the partition 301, a connecting chamber 302 is opened at the top of the rotating shaft 200, and a plurality of connecting pipes 303 connected to the connecting chamber 302 are connected to the annular tube 107;

[0058] By setting the liquid inlet 300, when used, the liquid to be dried can be input into the liquid chamber 101 from the liquid inlet 300. The liquid can be evenly distributed to the annular tube 107 through the connecting chamber 302. The multiple connecting tubes 303 on the annular tube 107 connected to the connecting chamber 302 can evenly transport the liquid to the atomizing nozzle 108, ensuring that the liquid is evenly distributed in the drying tower 100, and avoiding the situation where the liquid spray is too concentrated or sparse. In addition, the annular tube 107 is connected to the rotating shaft 200 through the connecting tube 303. When the rotating shaft 200 rotates, the rotation of the rotating shaft 200 drives the annular tube 107 and the atomizing nozzle 108 to rotate along the circumference of the rotating shaft 200, so that the atomizing nozzle 108 can evenly cover the area of ​​the drying chamber 102. Through this design, the liquid can not only be evenly distributed to the nozzle, but also produce a continuous atomization effect when the nozzle rotates. This rotational motion makes the spray more uniform, avoiding the situation where the liquid spray is too concentrated or uneven. When the atomizing nozzle 108 rotates around the rotating shaft 200, efficient liquid atomization and drying process can be achieved, further improving drying efficiency and product quality.

[0059] As a further solution of the present invention, the release component further comprises a stopper 400 slidably connected to the connection cavity 302, the bottom of the stopper 400 is connected to a connecting rod 401 slidably connected to the rotating shaft 200, and the connecting rod 401 is connected to a top platform 402;

[0060] By setting the block 400, the thickness of the block 400 is greater than the diameter of the connecting pipe 303. In the initial state, the block 400 is located below the connecting pipe 303. When the rotating shaft 200 and the lead screw a201 rotate to allow the connecting frame 202 to move upward to close the hot air duct 110, while the hot air duct 110 is closed, the connecting frame 202 touches the top platform 402, and the top platform 402 moves the block 400 through the connecting rod 401, so that the block 400 can 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 the powder is released. By synchronously stopping the delivery of the liquid, it is ensured that the liquid will not contact the dry powder during the drying process, thereby preventing the problem of excessive liquid spraying and powder agglomeration, and ensuring the drying quality and particle size uniformity of the powder.

[0061] As a further solution of the present invention, the liquid delivery component also includes an air pipe 500 connected to the partition 301, a piston 501 is slidably connected in the air pipe 500, a lead screw b502 is rotatably connected to the air pipe 500, the lead screw b502 is a reciprocating lead screw, the piston 501 is threadedly connected to the lead screw b502, the top of the air pipe 500 extends into the liquid chamber 101 and is provided with a through hole a503, a baffle a504 covering the through hole a503 is slidably connected to the top of the air pipe 500, a spring a505 is connected between the baffle a504 and the air pipe 500, a through hole b506 is provided on the top of the piston 501, a baffle b507 covering the through hole b506 is slidably connected to the piston 501, and a spring b508 is connected between the baffle b507 and the piston 501;

[0062] By setting the air pipe 500 and the piston 501, the through hole a503, the baffle a504 and the spring a505 on the air pipe 500 can form a one-way valve mechanism, and the through hole b506, the baffle b507 and the spring a505 on the piston 501 can also form a one-way valve mechanism. When in use, after the liquid is poured into the liquid chamber 101 to a suitable liquid level, the liquid inlet 300 is closed, and when the liquid is transported to the annular tube 107 and the atomizing nozzle 108 sprays atomized droplets, the lead screw b502 can be rotated to allow the piston 501 to move up and down in the air pipe 500. In this process, the up and down movement of the piston 501 will drive the one-way valve mechanism to operate. The gas is transported into the liquid chamber 101, thereby pressurizing the liquid chamber 101. By pressurizing the liquid chamber 101, it is possible to ensure that the pressure in the liquid chamber 101 is high enough, thereby providing sufficient airflow support to ensure that the atomizing nozzle 108 can effectively spray the physical and chemical liquid. This supercharging design can enhance the uniformity and stability of the spray, improve the efficiency of spray drying, and ensure the quality and particle size uniformity of the final powder product. In addition, the air pipe 500 is arranged on the partition 301, and the air inlet at the bottom of the air pipe 500 can correspond to the position of the blocking frame 104 and the filter cloth 105. When the hot air discharged during drying reaches the vent 106 through the filter cloth 105, it will pass through the air pipe 500. When the piston 501 moves up and down to push the gas into the liquid chamber 101 to pressurize the liquid chamber 101, it will also push the hot air into the liquid chamber 101, which plays a role in heating the liquid. This process can effectively increase the temperature of the liquid and provide the required heat for subsequent spray drying. The temperature increase in the liquid chamber 101 can not only promote the evaporation of the liquid, but also accelerate the transformation of the substance, making the spray drying process more efficient.

[0063] As a further solution of the present invention, the rotating shaft 200 is connected with a gear a509, and the lead screw b502 is connected with a gear b510 meshing with the gear a509;

[0064] When the shaft 200 rotates, the gear a509 drives the gear b510 to rotate, thereby rotating the lead screw b502. This structural design enables the lead screw b502 to move back and forth accurately through the gear transmission, thereby driving the piston 501 in the air pipe 500 to move up and down.

[0065] As a further solution of the present invention, the top of the hot air duct 110 is connected to a diverter pipe 600, the diameter of the diverter pipe 600 is smaller than the hot air duct 110, and a plurality of air jets are opened at the bottom of the diverter pipe 600, and the air jets are directed toward the filter cloth 105;

[0066] By setting the shunt pipe 600, when the hot air enters the hot air duct 110, a part of the hot air will enter the shunt pipe 600 and blow toward the filter cloth 105 through the air jet. A part of this part of the hot air will be absorbed by the air pipe 500, which is helpful for preheating the liquid. The hot air blown toward the filter cloth 105 can clean the surface of the filter cloth 105 to a certain extent and reduce the accumulation of powder. After the connecting frame 202 closes the hot air duct 110, all the hot air will enter the shunt pipe 600 and blow toward the surface of the filter cloth 105 evenly through multiple air jets, which can effectively back-blow the filter cloth 105, clean the filter cloth 105, blow down the powder adhering to the bottom of the filter cloth 105 and release it in the powder chamber, and avoid the filter cloth 105 being blocked or the air permeability being reduced due to the accumulation of powder.

[0067] As a further solution 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 setting the connection between the heat pump 601 and the hot air duct 110, the heat pump 601 can provide sufficient hot air flow to ensure that the air temperature and flow in the hot air duct 110 meet the requirements of the spray drying process. As the core component of the hot air component, the heat pump 601 can effectively control the hot air parameters required in the spray drying process by adjusting the air volume 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 transport hot air to various predetermined locations.

[0069] As a further solution of the present invention, a motor 602 is connected to the top of the base 109, and a driving shaft of the motor 602 is connected to the rotating shaft 200;

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

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

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

[0073] As a further solution 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 at the natural gas tank 605. The side wall of the drying tower 100 is connected to an electric spark igniter 608 extending into the diversion pipe 600 and corresponding to the delivery pipe 606.

[0074] As a further solution of the present invention, the outer wall of the drying tower 100 is provided with a manifold 609 connected to the vent 106, and the bottom of the manifold 609 is connected to a return pipe 610 connected to the base 109;

[0075] In this application, the spray drying system adopts a combination of direct natural gas heating and heat pump 601 circulation heating to achieve an efficient and energy-saving heating process. A natural gas tank 605 is arranged on the drying tower 100, and the natural gas tank 605 is connected to the shunt pipe 600 through a delivery pipe 606. One end of the delivery pipe 606 is located at the natural gas tank 605 and is provided with a valve 607 to control the flow and opening and closing of the natural gas. At the same time, the side wall of the drying tower 100 is installed with an electric spark igniter 608 corresponding to the shunt pipe 600 and the delivery pipe 606, which is used 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. In the startup stage of the system, when the temperature of the equipment system has not yet risen to 100°C, the natural gas combustion heating method is used to quickly heat up, improve the heating efficiency and save energy. When the system temperature rises above 100°C, it switches to the heat pump 601 circulation heating mode. The current high-temperature heat pump 601 can provide a maximum heating temperature of 140°C, which fully meets the working temperature requirement of 120°C to 130°C required for spray drying, thereby effectively reducing energy consumption. In addition, the outer wall of the drying tower 100 is provided with a manifold 609 connected to the vent 106, and the bottom of the manifold 609 is connected to the base 109 through a return pipe 610. This design allows the airflow in the drying tower 100 to form a closed cycle, which helps energy saving and recycling. During the drying process, the dried water-containing airflow is condensed into water through the low-temperature part of the heat pump 601, and the water is discharged through the discharge pipe of the heat pump 601. At the same time, the heat pump 601 recovers the heat released during the condensation process for heating, further reducing energy consumption. The filter cloth 105 provided in the entire system performs gas-solid separation on the airflow discharged from the drying tower 100 to achieve efficient collection of materials. Through this heating method combining rapid heating of natural gas with circulating heating of the heat pump 601, not only the efficiency of spray drying is improved, but also the energy consumption is significantly reduced, ensuring the stable quality of the final product and the economic and environmentally friendly drying process.

[0076] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention 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), wherein a liquid chamber (101), a drying chamber (102) and a dust chamber (103) are formed in the drying tower (100), and the three chambers are arranged from top to bottom; A blocking frame (104) is arranged in the drying chamber (102), a filter cloth (105) is arranged on the blocking frame (104), and a ventilation hole (106) is opened on the inner wall of the drying chamber (102) and is located above the blocking frame (104); an annular tube (107) disposed at the bottom of the blocking frame (104), wherein a plurality of atomizing nozzles (108) are disposed on the annular tube (107); A base (109) is arranged at the bottom of the drying tower (100), wherein a hot air component for outputting hot air is arranged in the base (109); A hot air duct (110) provided between the drying tower (100) and the base (109), used for connecting the hot air component with the drying chamber (102); A release component disposed in the drying tower (100) is used to intermittently release the dust in the drying chamber (102) into the dust chamber (103); the release component can stop the atomizing nozzle (108) from outputting liquid when releasing the dust; A liquid conveying component disposed in the drying tower (100), used for conveying the liquid in the liquid chamber (101) to the atomizing nozzle (108), wherein the liquid conveying component can preheat the liquid in the liquid conveying component; Wherein, the release component can stop the output of hot air into the drying chamber (102) when releasing the dust.

2. A multifunctional airflow spray drying system according to claim 1, characterized in that: The release component comprises a rotating shaft (200) rotatably connected to the drying tower (100), a lead screw a (201) being provided on the rotating shaft (200), the lead screw a (201) being a reciprocating lead screw, a connecting frame (202) being threadedly connected to the drying tower (100), a connecting port (203) being connected to the hot air duct (110) being provided on the connecting frame (202), a baffle (204) being connected to the rotating shaft (200), and a blocking frame (205) being sleeved outside the baffle (204) being connected to the bottom of the connecting frame (202).

3. A multifunctional airflow spray drying system according to claim 2, characterized in that: The liquid conveying component comprises a liquid inlet (300) connected to the top of the drying tower (100), the liquid inlet (300) is connected to the liquid chamber (101), a partition (301) is connected inside the drying tower (100), the top of the rotating shaft (200) extends into the liquid chamber (101) and is rotatably connected to the partition (301), a connecting chamber (302) is opened at the top of the rotating shaft (200), and a plurality of connecting pipes (303) connected to the connecting chamber (302) are connected to the annular tube (107).

4. A multifunctional airflow spray drying system according to claim 3, characterized in that: The release component also includes a stopper (400) slidably connected to the connection cavity (302), the bottom of the stopper (400) is connected to a connecting rod (401) slidably connected to the rotating shaft (200), and the connecting rod (401) is connected to a top platform (402).

5. A multifunctional airflow spray drying system according to claim 3, characterized in that: The liquid delivery component further comprises an air pipe (500) connected to the partition (301), a piston (501) being slidably connected in the air pipe (500), a lead screw b (502) being rotatably connected to the air pipe (500), the lead screw b (502) being a reciprocating lead screw, the piston (501) being threadedly connected to the lead screw b (502), the top of the air pipe (500) extending into the liquid chamber (101) and having a through hole a (503), the air pipe (500) 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 pipe (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), and a spring b (508) is connected between the baffle b (507) and the piston (501).

6. A multifunctional airflow spray drying system according to claim 5, characterized in that: The rotating shaft (200) is connected to a gear a (509), and the lead screw b (502) is connected to a gear b (510) meshing with the gear a (509).

7. A multifunctional airflow spray drying system according to claim 1, characterized in that: The top of the hot air duct (110) is connected to a diverter pipe (600), the diameter of the diverter pipe (600) is smaller than that of the hot air duct (110), and the bottom of the diverter pipe (600) is provided with a plurality of air jets, which face the filter cloth (105).

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

9. 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 a driving shaft of the motor (602) is connected to the rotating shaft (200).

10. 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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