Spray drying system

Abstract

The invention relates to the technical field of drying equipment, and provides a spray drying system which comprises a spray drying unit and a heat pump unit, the spray drying unit at least comprises a drying device, a feeding pipeline, a gas supply pipeline and an exhaust pipeline, the gas supply pipeline supplies heat source gas to the drying device, and the exhaust pipeline is used for exhausting gas in the drying device; the heat pump unit at least comprises a compressor, an evaporator and a condenser, the evaporator is used for heat exchange between a heat exchange medium and gas in the exhaust pipeline, and the condenser is used for heat exchange between the heat exchange medium and the gas supply pipeline. According to the arrangement, heat of gas in the exhaust pipeline can be recycled through the heat exchange medium of the heat pump unit, and waste of heat resources is avoided; the compressor is used for compressing the heat exchange medium to increase enthalpy, the temperature of the heat exchange medium is effectively increased, heat is supplied to the gas in the gas supply pipeline through heat exchange between the heat exchange medium of the heat pump unit and the gas in the gas supply pipeline, the temperature of the gas in the gas supply pipeline is effectively increased, use of a heater is reduced, and energy consumption is reduced.

Description

Technical Field

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

[0002] Spray drying technology is a technology that disperses liquid or slurry materials into fine droplets through an atomizer and contacts them with hot air, using the heat energy of the hot air to quickly evaporate the water in the liquid or slurry materials, thereby obtaining dry powder or granular products. The current spray drying process is mainly completed in a drying tower, which is equipped with a hot air inlet and an atomizer. The liquid or slurry material enters the drying tower through the atomizer, and the hot air enters the drying tower through the hot air inlet. As the spray drying process proceeds, the dry powder or particles are deposited at the bottom of the drying tower, and the high-temperature gas in the drying tower is gradually discharged.

[0003] In the related art, the evaporation volume in the drying tower is large, and the demand for hot air is large. The hot air supplied to the drying tower is mainly obtained by heating the air with an electric heater, which consumes a lot of energy. In addition, the high-temperature gas in the drying tower is directly discharged into the atmosphere, resulting in a large amount of heat resources being wasted.

[0004] Therefore, how to solve the problems of high energy consumption and waste of heat resources in the spray drying system in the related art has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The present invention provides a spray drying system, which is used to solve the defects of high energy consumption and waste of heat resources existing in the spray drying system in the related art.

[0006] The present invention provides a spray drying system, comprising: The spray drying unit comprises at least a drying device, a material supply pipeline, an air supply pipeline and an exhaust pipeline, wherein the material supply pipeline is suitable for supplying the material to be dried to the drying device, the air supply pipeline is suitable for supplying the heat source gas to the drying device, the exhaust pipeline is suitable for exhausting the gas in the drying device, and the drying device has a discharge port for discharging the dried material; The heat pump unit comprises at least a compressor, an evaporator and a condenser, wherein the evaporator is suitable for heat exchange between the heat exchange medium and the gas in the exhaust pipeline, and the condenser is suitable for heat exchange between the heat exchange medium and the gas in the gas supply pipeline.

[0007] According to a spray drying system provided by the present invention, the condenser has a first medium channel and a first gas channel, the evaporator has a second medium channel and a second gas channel, the first gas channel of the condenser is connected to the gas supply pipeline, and the second gas channel of the evaporator is connected to the exhaust pipeline; The heat pump unit further includes a liquid storage tank and a throttle valve, and the compressor, the first medium channel of the condenser, the throttle valve, the liquid storage tank and the second medium channel of the evaporator are sequentially connected to form a closed loop structure.

[0008] According to a spray drying system provided by the present invention, the heat pump unit further comprises a first power pump, which is arranged between the liquid storage tank and the second medium channel of the evaporator, and is suitable for providing power for the circulation of the heat exchange medium.

[0009] According to a spray drying system provided by the present invention, the spray drying unit also includes an air inlet fan and a heater, the air inlet fan and the heater are arranged on the air supply pipeline, and the two ends of the first gas channel of the condenser are respectively connected to the air inlet fan and the heater.

[0010] According to a spray drying system provided by the present invention, the spray drying unit also includes at least one of a first filter and a second filter, the first filter and the second filter are arranged in the air supply pipeline, the first filter is arranged at the inlet end of the air intake fan, and the second filter is arranged at the outlet end of the heater.

[0011] According to a spray drying system provided by the present invention, the spray drying unit also includes a separator, the separator having a gas inlet, a gas outlet and a solid outlet, the gas inlet of the separator is connected to the drying device, the gas outlet of the separator is connected to the exhaust pipeline, and the solid outlet of the separator is for discharging separated solids.

[0012] According to a spray drying system provided by the present invention, the spray drying unit further includes a third filter, the third filter is arranged in the exhaust pipe, and the third filter is suitable for filtering the gas in the exhaust pipe.

[0013] According to a spray drying system provided by the present invention, the spray drying system further comprises an exhaust fan, wherein the exhaust fan is arranged in the exhaust pipeline, and the exhaust fan provides power for the gas circulation in the exhaust pipeline.

[0014] According to a spray drying system provided by the present invention, the spray drying unit also includes a storage tank and a second power pump, the storage tank and the second power pump are arranged in the feed pipeline, the storage tank is suitable for storing liquid material, the second power pump is arranged between the storage tank and the drying device, and the second power pump is suitable for pumping the material in the storage tank to the drying device.

[0015] According to a spray drying system provided by the present invention, the drying device includes a drying chamber and an atomizer, the atomizer is arranged at the inner top of the drying chamber, the atomizer is connected to the feed pipeline, and the atomizer is suitable for dispersing and atomizing the material entering the drying chamber.

[0016] The spray drying system provided by the present invention includes a spray drying unit and a heat pump unit. The spray drying unit includes at least a drying device, a feed pipeline, an air supply pipeline and an exhaust pipeline. The feed pipeline is used to supply the material to be dried to the drying device, the air supply pipeline is used to supply the heat source gas to the drying device, and the exhaust pipeline is used to discharge the gas in the drying device. The drying device has a discharge port for discharging the dried material. After the material to be dried and the heat source gas enter the drying device through the feed pipeline and the air supply pipeline respectively, the moisture in the material to be dried evaporates under the action of the heat source gas, thereby obtaining the dried material, and the dried material can be discharged through the discharge port. The gas in the drying device is discharged through the exhaust pipeline. The heat pump unit includes at least a compressor, an evaporator and a condenser. The evaporator is used to perform heat exchange between the heat exchange medium and the gas in the exhaust pipeline, and the condenser is used to perform heat exchange between the heat exchange medium and the gas in the air supply pipeline. The heat exchange medium absorbs the heat of the gas in the exhaust pipe in the evaporator and then enters the compressor. After the compression enthalpy increase effect of the compressor, it enters the condenser and releases the heat to the gas in the gas supply pipe. The gas in the gas supply pipe absorbs the heat and the temperature rises. In this way, the heat exchange medium of the heat pump unit can be used to recover the heat of the gas in the exhaust pipe, avoiding the waste of heat resources; the compression enthalpy increase effect of the compressor on the heat exchange medium effectively increases the temperature of the heat exchange medium, and then the heat exchange between the heat exchange medium of the heat pump unit and the gas in the gas supply pipe is used to heat the gas in the gas supply pipe, effectively increasing the gas temperature in the gas supply pipe, reducing the workload of the heater, reducing the use of the heater, reducing energy consumption, and solving the problems of high energy consumption and waste of heat resources in the spray drying system in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural principle diagram of the spray drying system provided by the present invention.

[0019] Reference numerals: 1. Atomizer; 2. Feed pipeline; 3. Air supply pipeline; 4. Exhaust pipeline; 5. Discharge port; 6. Compressor; 7. Evaporator; 8. Condenser; 9. Liquid storage tank; 10. Throttle valve; 11. First power pump; 12. Air intake fan; 13. Heater; 14. First filter; 15. Second filter; 16. Separator; 17. Solids outlet; 18. Third filter; 19. Exhaust fan; 20. Storage tank; 21. Second power pump; 22. Drying chamber. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0021] Combine the following Figure 1 The spray drying system of the present invention is described.

[0022] like Figure 1 As shown, the spray drying system provided by the embodiment of the present invention includes a spray drying unit and a heat pump unit.

[0023] Specifically, the spray drying unit at least includes a drying device, a feed pipeline 2, an air supply pipeline 3 and an exhaust pipeline 4. The feed pipeline 2 is used to supply the material to be dried to the drying device, the air supply pipeline 3 is used to supply the heat source gas to the drying device, and the exhaust pipeline 4 is used to discharge the gas in the drying device. The drying device has a discharge port 5 for discharging the dried material to the outside. A receiving device can be provided below the discharge port 5 of the drying device to receive and collect the dried material discharged by the drying device.

[0024] The material receiving device can be configured as a material receiving tank, which collects and stores the dried material discharged from the drying device. The material receiving device can also be configured as a conveyor belt device, which receives the dried material discharged from the drying device and transports the received dried material to a target location.

[0025] After the material to be dried and the heat source gas enter the drying device through the feed pipeline 2 and the gas supply pipeline 3 respectively, the moisture in the material to be dried evaporates under the action of the heat source gas, thereby obtaining a dried material, which can be discharged through the discharge port 5. The gas in the drying device is discharged through the exhaust pipeline 4.

[0026] The heat pump unit at least includes a compressor 6 , an evaporator 7 and a condenser 8 . The evaporator 7 is used for heat exchange between the heat exchange medium and the gas in the exhaust pipe 4 . The condenser 8 is used for heat exchange between the heat exchange medium and the gas in the gas supply pipe 3 .

[0027] After the heat exchange medium absorbs the heat of the gas in the exhaust pipe 4 in the evaporator 7, it enters the compressor 6. After the compression enthalpy increase effect of the compressor 6, it enters the condenser 8 and releases the heat to the gas in the gas supply pipe 3. The gas in the gas supply pipe 3 absorbs the heat and its temperature rises.

[0028] With such an arrangement, the heat of the gas in the exhaust pipe 4 can be recovered by the heat exchange medium of the heat pump unit, thereby avoiding the waste of heat resources; the compression enthalpy-increasing effect of the compressor 6 on the heat exchange medium can effectively increase the temperature of the heat exchange medium, and then the heat exchange between the heat exchange medium of the heat pump unit and the gas in the gas supply pipe 3 is used to heat the gas in the gas supply pipe 3, thereby effectively increasing the gas temperature in the gas supply pipe 3, reducing the workload of the heater 13, reducing the use of the heater 13, reducing energy consumption, saving energy and increasing production, and solving the problems of high energy consumption and waste of heat resources existing in the spray drying system in the related technology.

[0029] In the embodiment of the present invention, the condenser 8 has a first medium channel for the circulation of a heat exchange medium and a first gas channel for the circulation of gas. The heat exchange medium in the first medium channel and the gas in the first gas channel can perform heat exchange.

[0030] The evaporator 7 has a second medium channel for the circulation of a heat exchange medium and a second gas channel for the circulation of gas. The heat exchange medium in the second medium channel and the gas in the second gas channel can exchange heat.

[0031] The first gas channel of the condenser 8 is connected to the gas supply pipeline 3, and the second gas channel of the evaporator 7 is connected to the exhaust pipeline 4. The heat exchange medium is in liquid state when it enters the second medium channel of the evaporator 7, and absorbs the heat of the gas in the second gas channel in the evaporator 7 and evaporates to form a gaseous state. After the gaseous heat exchange medium is compressed by the compressor 6, a high-temperature and high-pressure gaseous heat exchange medium is formed. The high-temperature and high-pressure gaseous heat exchange medium enters the first medium channel of the condenser 8 and condenses to form a liquid heat exchange medium. The heat released during the condensation of the heat exchange medium can be transferred to the gas in the first gas channel of the condenser 8, and the gas in the first gas channel absorbs the heat and the temperature rises.

[0032] In this embodiment, the heat pump unit further includes a liquid storage tank 9 and a throttle valve 10. The compressor 6, the first medium channel of the condenser 8, the throttle valve 10, the liquid storage tank 9 and the second medium channel of the evaporator 7 are sequentially connected to form a closed loop structure, and the heat exchange medium circulates in the heat pump unit. After the heat exchange medium forms a liquid heat exchange medium in the condenser 8, it enters the throttle valve 10. The throttle valve 10 can control the flow rate of the heat exchange medium. After the heat exchange medium passes through the throttle valve 10, the pressure is reduced so that the heat exchange medium enters the evaporator 7 at a lower pressure.

[0033] The liquid storage tank 9 has the function of storing heat exchange medium, and is used to replenish the heat exchange medium or store excess heat exchange medium. In addition, the liquid storage tank 9 also has the function of gas-liquid separation. After the heat exchange medium passes through the throttle valve 10, part of the heat exchange medium may be in gaseous state. The liquid storage tank 9 can only allow the liquid heat exchange medium to enter the evaporator 7 to improve the evaporation efficiency.

[0034] In this embodiment, the heat pump unit also includes a first power pump 11, which is arranged between the liquid storage tank 9 and the second medium channel of the evaporator 7. The first power pump 11 is used to provide power for the circulation of the heat exchange medium and promote the circulation of the heat exchange medium to ensure the efficient operation of the heat pump unit.

[0035] The first power pump 11 may be, but is not limited to, a cryogenic liquid pump.

[0036] In the embodiment of the present invention, the spray drying unit further includes an air inlet fan 12 and a heater 13, which are arranged in the air supply pipeline 3, and the two ends of the first gas channel of the condenser 8 are respectively connected to the air inlet fan 12 and the heater 13. The air inlet fan 12 can inhale air and provide power for the circulation of air in the air supply pipeline 3. When the air inhaled by the air inlet fan 12 passes through the first gas channel of the condenser 8, it absorbs the heat of the heat exchange medium in the first medium channel of the condenser 8, and then enters the heater 13. After passing through the heater 13, the air enters the drying device.

[0037] After the air sucked in by the air inlet fan 12 absorbs the heat of the heat exchange medium in the condenser 8, if the temperature of the air reaches the target temperature, there is no need to heat the air using the heater 13, and the heater 13 can be turned off at this time to reduce the operating energy consumption of the heater 13. If the temperature of the air is lower than the target temperature, the heater 13 needs to be operated to further heat the air so that the temperature of the air can reach the target temperature after passing through the heater 13.

[0038] The target temperature is the gas temperature required by the drying device to dry the material, and the target temperature can be set to 140-150 degrees Celsius.

[0039] The heater 13 may be, but is not limited to, an electric heater.

[0040] In the embodiment of the present invention, the heat pump unit is provided to reduce the workload of the electric heater, reduce the use of the electric heater, and reduce the consumption of electric energy, thereby reducing carbon emissions.

[0041] In this embodiment, the spray drying unit further includes at least one of a first filter 14 and a second filter 15. The first filter 14 and the second filter 15 are disposed in the gas supply pipeline 3, and are both used to filter the gas in the gas supply pipeline 3.

[0042] Only the first filter 14 may be provided on the air supply pipeline 3 , only the second filter 15 may be provided on the air supply pipeline 3 , or both the first filter 14 and the second filter 15 may be provided on the air supply pipeline 3 .

[0043] Reference Figure 1 A first filter 14 and a second filter 15 are simultaneously arranged on the air supply pipeline 3 , the first filter 14 is arranged at the inlet end of the air intake fan 12 , and the second filter 15 is arranged at the outlet end of the heater 13 .

[0044] The first filter 14 can be a primary and medium efficiency filter with a large pleated filtering area, which can ensure the fresh air volume while filtering out large particles, dust, mosquitoes, hair and other impurities in the gas. The second filter 15 is a high temperature and high efficiency filter that can adapt to high temperature conditions and intercept, adsorb and filter out particles in the gas under high temperature conditions.

[0045] In the embodiment of the present invention, the spray drying unit further includes a separator 16, and the separator 16 has a gas inlet, a gas outlet, and a solid outlet 17. The gas inlet of the separator 16 is connected to the drying device, the gas outlet of the separator 16 is connected to the exhaust pipeline 4, and the solid outlet 17 of the separator 16 is for the separated solid to be discharged outward.

[0046] After the material to be dried is dried in the drying device, most of the dried material will be deposited at the bottom of the drying device to be discharged through the discharge port 5 of the drying device. However, it is inevitable that some dried materials in powder form or with smaller particles will enter the exhaust pipe 4 together with the gas. In other words, the material entering the exhaust pipe 4 is a gas-solid mixture. The gas-solid mixture enters the separator 16, and the gas and the solid are separated in the separator 16, wherein the gas is discharged into the exhaust pipe 4 through the gas outlet of the separator 16, and the solid is discharged through the solid outlet 17 of the separator 16.

[0047] The separator 16 may be, but is not limited to, a cyclone separator 16 .

[0048] A material receiving device may be provided below the solid outlet 17 of the separator 16 to receive and collect the solid material separated by the separator 16 .

[0049] The receiving device can be configured as a receiving tank, which collects and stores the solid materials separated by the separator 16. The receiving device can also be configured as a conveyor belt device, which receives the solid materials separated by the separator 16 and transports the received solid materials to a target location.

[0050] In a further embodiment, the spray drying unit further includes a third filter 18, which is disposed in the exhaust pipe 4 and is located downstream of the separator 16. After the gas separated by the separator 16 passes through the third filter 18, the third filter 18 can further filter out solid impurities such as dust particles and particles with smaller diameters in the gas, thereby reducing impurities in the exhaust pipe 4 and avoiding blockage of the second gas channel of the evaporator 7.

[0051] The third filter 18 can be, but is not limited to, a bag filter.

[0052] In this embodiment, the spray drying system also includes an exhaust fan 19, which is arranged in the exhaust pipe 4. The exhaust fan 19 provides power for the gas circulation in the exhaust pipe 4 to promote the circulation of gas in the exhaust pipe 4, increase the gas circulation speed in the second gas channel of the evaporator 7, and thus improve the evaporation efficiency.

[0053] One end of the air supply pipeline 3 away from the drying device is connected to the atmosphere, and air can be used as the air source.

[0054] One end of the exhaust pipe 4 away from the drying device is connected to the atmosphere, and the gas in the exhaust pipe 4 passes through the evaporator 7 and is directly discharged into the atmosphere.

[0055] In the embodiment of the present invention, the spray drying unit further includes a storage tank 20 and a second power pump 21, and the storage tank 20 and the second power pump 21 are arranged in the feed pipeline 2. The storage tank 20 is used to store liquid material, and the second power pump 21 is arranged between the storage tank 20 and the drying device, and the second power pump 21 is used to pump the material in the storage tank 20 to the drying device.

[0056] The second power pump 21 can be, but is not limited to, a peristaltic pump. The peristaltic pump drives the roller to rotate through a motor. When the roller moves in the pump tube, it squeezes the hose, forms a vacuum to suck in the fluid, and then continues to roll to squeeze out the fluid, thereby pumping the fluid. The peristaltic pump has a strong self-priming ability and can efficiently transport both high-viscosity liquids and low-viscosity liquids, so that the spray drying system has a strong adaptability to the physical properties of the material to be dried. Moreover, when the peristaltic pump is transporting materials, the materials only contact the pump tube of the peristaltic pump, and the materials will not contact the pump body, which is convenient for cleaning and maintenance.

[0057] In this embodiment, the drying device includes a drying chamber 22 and an atomizer 1, and the atomizer 1 is arranged at the inner top of the drying chamber 22. The atomizer 1 is connected to the feed pipeline 2, and the atomizer 1 disperses and atomizes the material entering the drying chamber 22. After the dried material passes through the atomizer 1, it can be atomized into fine droplets.

[0058] The drying chamber 22 provides a place for the atomized material to contact with the heat source gas and for the dried material to grow.

[0059] The atomizer 1 can be, but is not limited to, a centrifugal atomizer.

[0060] In summary, the spray drying system provided in the embodiment of the present invention utilizes a closed heat pump unit to recover waste heat resources from the high-temperature gas in the exhaust pipe 4 of the spray drying unit, and then heats the room temperature air in the air supply pipe 3 of the spray drying unit. The recovered heat is compressed and enthalpy increased and then used as a drying heat source, thereby reducing the energy consumption and carbon emissions of the spray drying system.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spray drying system, characterized in that: include: A spray drying unit, comprising at least a drying device, a material supply pipeline (2), an air supply pipeline (3) and an exhaust pipeline (4), wherein the material supply pipeline (2) is suitable for supplying a material to be dried to the drying device, the air supply pipeline (3) is suitable for supplying a heat source gas to the drying device, and the exhaust pipeline (4) is suitable for exhausting the gas in the drying device, and the drying device has an outlet (5) for exhausting the dried material; The heat pump unit comprises at least a compressor (6), an evaporator (7) and a condenser (8), wherein the evaporator (7) is suitable for heat exchange between a heat exchange medium and the gas in the exhaust pipe (4), and the condenser (8) is suitable for heat exchange between a heat exchange medium and the gas in the gas supply pipe (3).

2. The spray drying system according to claim 1, characterized in that: The condenser (8) has a first medium channel and a first gas channel, the evaporator (7) has a second medium channel and a second gas channel, the first gas channel of the condenser (8) is connected to the gas supply pipeline (3), and the second gas channel of the evaporator (7) is connected to the exhaust pipeline (4); The heat pump unit further comprises a liquid storage tank (9) and a throttle valve (10), and the compressor (6), the first medium channel of the condenser (8), the throttle valve (10), the liquid storage tank (9) and the second medium channel of the evaporator (7) are sequentially connected to form a closed loop structure.

3. The spray drying system according to claim 2, characterized in that: The heat pump unit further comprises a first power pump (11), the first power pump (11) being arranged between the liquid storage tank (9) and the second medium channel of the evaporator (7), the first power pump (11) being suitable for providing power for the circulation of the heat exchange medium.

4. The spray drying system according to claim 2, characterized in that: The spray drying unit further comprises an air inlet fan (12) and a heater (13), wherein the air inlet fan (12) and the heater (13) are arranged on the air supply pipeline (3), and the two ends of the first gas channel of the condenser (8) are respectively connected to the air inlet fan (12) and the heater (13).

5. The spray drying system according to claim 4, characterized in that: The spray drying unit further comprises at least one of a first filter (14) and a second filter (15), wherein the first filter (14) and the second filter (15) are arranged on the air supply pipeline (3), the first filter (14) is arranged on the inlet end of the air inlet fan (12), and the second filter (15) is arranged on the outlet end of the heater (13).

6. The spray drying system according to claim 1, characterized in that: The spray drying unit further comprises a separator (16), wherein the separator (16) has a gas inlet, a gas outlet and a solid outlet (17), wherein the gas inlet of the separator (16) is connected to the drying device, the gas outlet of the separator (16) is connected to the exhaust pipeline (4), and the solid outlet (17) of the separator (16) is used for discharging the separated solids.

7. The spray drying system according to claim 1, characterized in that: The spray drying unit further comprises a third filter (18), wherein the third filter (18) is arranged in the exhaust pipe (4), and the third filter (18) is suitable for filtering the gas in the exhaust pipe (4).

8. The spray drying system according to claim 1, characterized in that: The spray drying system further comprises an exhaust fan (19), wherein the exhaust fan (19) is arranged in the exhaust pipeline (4), and the exhaust fan (19) provides power for the circulation of gas in the exhaust pipeline (4).

9. The spray drying system according to claim 1, characterized in that: The spray drying unit further comprises a material storage tank (20) and a second power pump (21), wherein the material storage tank (20) and the second power pump (21) are arranged in the material supply pipeline (2), the material storage tank (20) is suitable for storing liquid material, the second power pump (21) is arranged between the material storage tank (20) and the drying device, and the second power pump (21) is suitable for pumping the material in the material storage tank (20) to the drying device.

10. The spray drying system according to claim 1, characterized in that: The drying device comprises a drying chamber (22) and an atomizer (1), wherein the atomizer (1) is arranged at the inner top of the drying chamber (22), the atomizer (1) is connected to the feed pipeline (2), and the atomizer (1) is suitable for dispersing and atomizing the material entering the drying chamber (22).

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