Plasma assisted spray drying apparatus

Abstract

This utility model relates to the field of spray drying technology, specifically to plasma-assisted spray drying equipment, including a drying tower, a plasma generator, a first feeding hopper, a second feeding hopper, and a return pipe. The plasma generator is installed on the top of the drying tower, and a first high-pressure pump and a second high-pressure pump are respectively installed on the upper ends of both sides of the drying tower. This novel plasma-assisted spray drying equipment has a structure with two sets of atomizing nozzles inside the drying tower, which can spray from different angles and positions, greatly increasing the coverage area of ​​the spray inside the drying tower, allowing more material to come into full contact with the atomized droplets simultaneously, thereby accelerating the drying speed and improving the drying efficiency. Moreover, it has the function of collecting and reusing the exhaust gas after atomization drying, thus effectively improving the environmental friendliness of the spray drying equipment.

Description

Technical Field

[0001] This utility model relates to the field of spray drying technology, specifically to plasma-assisted spray drying equipment. Background Technology

[0002] Spray drying is a systematic technology applied to material drying. After the liquid material is atomized, it comes into contact with hot air in a drying tower, where the moisture in it is rapidly vaporized to obtain the dried product. Radio frequency plasma and microwave plasma are two common plasma generation methods. Plasma can provide a heat source for spray drying to complete the evaporation of moisture. It can effectively improve the sphericity, flowability, and bulk density of powders and is widely used in powder preparation in industries such as 3D printing and thermal spraying.

[0003] However, existing plasma-assisted spray drying devices have simple structures and usually rely on a single nozzle for spraying, resulting in a limited spray range. This means that some materials cannot come into contact with the atomized droplets in time, and there is a lack of structures to collect and reuse the exhaust gas after atomization and drying, which makes the environmental performance of the spray drying device not very good. Therefore, we propose a plasma-assisted spray drying device. Utility Model Content

[0004] To address the problems in existing technologies, this utility model provides a plasma-assisted spray drying device. This novel plasma-assisted spray drying device features a structure with two sets of atomizing nozzles inside the drying tower, allowing spraying from different angles and positions. This significantly increases the coverage area of ​​the spray within the drying tower, enabling more material to simultaneously and fully contact the atomized droplets, thereby accelerating the drying speed and improving drying efficiency. Furthermore, it has the function of collecting and reusing the exhaust gas after atomization drying, thus effectively improving the environmental friendliness of the spray drying equipment.

[0005] The technical solution adopted by this utility model to solve its technical problem is a plasma-assisted spray drying equipment, including a drying tower, a plasma generator, a first feeding hopper, a second feeding hopper, and a return pipe. The plasma generator is installed on the top of the drying tower. A first high-pressure pump and a second high-pressure pump are respectively installed on the upper ends of both sides of the drying tower. A first feeding hopper and a second feeding hopper are respectively provided on the top of the first high-pressure pump and the second high-pressure pump. A first atomizing nozzle and a second atomizing nozzle are respectively fixed on the upper ends of both sides inside the drying tower. A conveying pipe is connected between the output end of the first high-pressure pump and the first atomizing nozzle, and between the second high-pressure pump and the second atomizing nozzle. A plasma nozzle is fixed on the inner top of the drying tower.

[0006] The bottom of the drying tower is provided with a discharge channel, and the bottom of the discharge channel is connected to a return pipe. An air nozzle is provided on one side inside the drying tower. The air outlet of the return pipe is connected to the air nozzle. An air inlet is provided on the outer side of the return pipe near the air nozzle.

[0007] By adopting the above technical solution, this novel plasma-assisted spray drying equipment has a structure with two sets of atomizing nozzles inside the drying tower, which can spray from different angles and positions, greatly increasing the coverage area of ​​the spray in the drying tower, allowing more materials to come into full contact with the atomized droplets at the same time, thereby accelerating the drying speed and improving the drying efficiency. In addition, it has the function of collecting and reusing the exhaust gas after atomization drying, thus effectively improving the environmental friendliness of the spray drying equipment.

[0008] Specifically, a discharge valve is provided on the discharge channel, and a steam jet pump is provided on the outer side of the return pipe near the discharge channel.

[0009] By adopting the above technical solutions, the discharge valve can control the opening and closing of the discharge channel, and the steam jet pump can control the pressure of waste heat, which helps to recover and reuse waste heat.

[0010] Specifically, both the No. 1 and No. 2 feeding hoppers are equipped with guide strips on their inner sides.

[0011] By adopting the above technical solution, the guide strip can promote the smooth flow of materials inside the No. 1 and No. 2 feeding hoppers.

[0012] Specifically, a transparent observation window is installed on the other side of the drying tower by screws.

[0013] Specifically, the bottom of the drying tower is uniformly fixed with support columns.

[0014] Specifically, mounting brackets are fixed to the upper ends of both sides of the drying tower.

[0015] The beneficial effects of this utility model are:

[0016] (1) The plasma-assisted spray drying equipment described in this utility model can spray from different angles and positions in the No. 1 and No. 2 feeding hoppers, increasing the coverage area of ​​the spray and enabling more materials to come into full contact with the atomized droplets at the same time, thereby accelerating the drying speed and improving the drying efficiency.

[0017] (2) The plasma-assisted spray drying equipment described in this utility model can recycle and reuse the exhaust gas inside the drying tower by cooperating with the steam jet pump and the return pipe. It can also preheat the air entering from the outside, increase the initial temperature difference between the air and the droplets, and help to increase the evaporation rate and shorten the drying time.

[0018] (3) The plasma-assisted spray drying equipment described in this utility model has a guide bar that can optimize the flow trajectory of the material inside the No. 1 and No. 2 feeding hoppers, and prevent the material from accumulating. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the drying tower of this utility model;

[0022] Figure 3 This is a schematic diagram of the guide strip structure of this utility model;

[0023] Figure 4 For the present utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0024] In the diagram: 1. Drying tower; 2. Plasma generator; 3. Mounting frame; 4. High-pressure pump No. 1; 5. High-pressure pump No. 2; 6. Feed hopper No. 1; 7. Feed hopper No. 2; 8. Transparent observation window; 9. Return pipe; 10. Discharge channel; 11. Support column; 12. Air inlet; 13. Atomizing nozzle No. 1; 14. Atomizing nozzle No. 2; 15. Plasma nozzle; 16. Air nozzle; 17. Steam jet pump; 18. Guide bar; 19. Conveying pipe; 20. Discharge valve. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] To accelerate drying speed, improve drying efficiency, and enhance the environmental friendliness of spray drying equipment, such as... Figure 1-4As shown, the plasma-assisted spray drying equipment of this utility model includes a drying tower 1, a plasma generator 2, a first feeding hopper 6, a second feeding hopper 7, and a return pipe 9. The plasma generator 2 is installed on the top of the drying tower 1. A first high-pressure pump 4 and a second high-pressure pump 5 are respectively installed on the upper ends of both sides of the drying tower 1. The first feeding hopper 6 and the second feeding hopper 7 are respectively provided on the top of the first high-pressure pump 4 and the second high-pressure pump 5. A first atomizing nozzle 13 and a second atomizing nozzle 14 are respectively fixed on the upper ends of both sides inside the drying tower 1. A conveying pipe 19 is connected between the output end of the first high-pressure pump 4 and the first atomizing nozzle 13, and between the second high-pressure pump 5 and the second atomizing nozzle 14. A plasma nozzle 15 is fixed on the inner top of the drying tower 1.

[0027] The bottom of the drying tower 1 is provided with a discharge channel 10, and the bottom of the discharge channel 10 is connected to a return pipe 9. An air nozzle 16 is provided on one side inside the drying tower 1. The air outlet end of the return pipe 9 is connected to the air nozzle 16. An air inlet 12 is provided on the outer side of the return pipe 9 near the air nozzle 16.

[0028] When in use, the No. 1 feeding hopper 6 and the No. 2 feeding hopper 7 can spray from different angles and positions, increasing the coverage area of ​​the spray and allowing more material to come into full contact with the atomized droplets at the same time, thereby accelerating the drying speed and improving the drying efficiency.

[0029] By combining the steam jet pump 17 and the return pipe 9, the exhaust gas inside the drying tower 1 can be recovered and reused, and the incoming air can be preheated to increase the initial temperature difference between the air and the droplets, which helps to increase the evaporation rate and shorten the drying time.

[0030] The guide strip 18 can optimize the flow trajectory of materials inside the No. 1 feeding hopper 6 and the No. 2 feeding hopper 7, and prevent the accumulation of materials.

[0031] For example, such as Figure 1 , Figure 2 As shown, a discharge valve 20 is provided on the discharge channel 10, and a steam jet pump 17 is provided on the outer side of the return pipe 9 near the end of the discharge channel 10.

[0032] In use, the discharge valve 20 can control the opening and closing of the discharge channel 10, and the steam jet pump 17 can pressurize the waste heat, which helps to recover and reuse the waste heat.

[0033] For example, such as Figure 3 As shown, guide strips 18 are provided on the inner side of both the No. 1 feeding hopper 6 and the No. 2 feeding hopper 7.

[0034] When in use, the No. 1 feeding hopper 6 and the No. 2 feeding hopper 7 have the same structure, which makes it easy for personnel to put materials into the interior of the drying tower 1. The guide strip 18 can promote the smooth flow of materials inside the No. 1 feeding hopper 6 and the No. 2 feeding hopper 7.

[0035] For example, such as Figure 1 As shown, a transparent observation window 8 is installed on the other side of the drying tower 1 by screws.

[0036] During use, the transparent observation window 8 allows personnel to view the interior of the drying tower 1 in real time.

[0037] For example, such as Figure 1 As shown, support columns 11 are uniformly fixed at the bottom of the drying tower 1.

[0038] When in use, the support column 11 can support the drying tower 1.

[0039] For example, such as Figure 1 , Figure 2 As shown, mounting brackets 3 are fixed to the upper ends of both sides of the drying tower 1.

[0040] During use, both the No. 1 high-pressure pump 4 and the No. 2 high-pressure pump 5 are detachably connected to the mounting bracket 3 via bolts.

[0041] In use, personnel feed the liquid material into the drying tower 1 through the No. 1 feeding hopper 6 and the No. 2 feeding hopper 7. The No. 1 feeding hopper 6 and the No. 2 feeding hopper 7 inside the drying tower 1 can spray atomized liquid material from both sides inside the drying tower 1. The spray can be performed from different angles and positions, which greatly increases the coverage area of ​​the spray inside the drying tower. At the same time, the plasma generator 2 delivers the generated high-temperature plasma into the drying tower 1 through the plasma nozzle 15, so that more material can come into full contact with the atomized droplets at the same time, thereby accelerating the drying speed and improving the drying efficiency.

[0042] Furthermore, personnel open the discharge valve 20 on the discharge channel 10. With the cooperation of the steam jet pump 17 and the return pipe 9, the exhaust gas inside the drying tower 1 can be extracted, avoiding the direct discharge of exhaust gas containing high temperature. Outside air can enter the interior of the return pipe 9 through the air inlet 12, and then mix with the recovered exhaust gas, and then enter the interior of the drying tower 1 together. This method can preheat the outside air, increase the initial temperature difference between the air and the droplets, help to increase the evaporation rate, and thus shorten the drying time.

[0043] Furthermore, the guide strip 18 optimizes the flow trajectory of the material inside the first feeding hopper 6 and the second feeding hopper 7. When the material falls into the first feeding hopper 6 and the second feeding hopper 7 from above, the material will slide down along the channel formed by the guide strip 18, instead of flowing randomly inside the first feeding hopper 6 and the second feeding hopper 7, thereby preventing the accumulation of material.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plasma-assisted spray drying device, characterized in that, The equipment includes a drying tower (1), a plasma generator (2), a first feeding hopper (6), a second feeding hopper (7), and a return pipe (9). The top of the drying tower (1) is equipped with a plasma generator (2). The upper ends of both sides of the drying tower (1) are respectively equipped with a first high-pressure pump (4) and a second high-pressure pump (5). The top of the first high-pressure pump (4) and the second high-pressure pump (5) are respectively equipped with a first feeding hopper (6) and a second feeding hopper (7). The upper ends of both sides inside the drying tower (1) are respectively fixed with a first atomizing nozzle (13) and a second atomizing nozzle (14). The output end of the first high-pressure pump (4) is connected to the first atomizing nozzle (13), and the second high-pressure pump (5) is connected to the second atomizing nozzle (14). The top of the drying tower (1) is fixed with a plasma nozzle (15). The bottom of the drying tower (1) is provided with a discharge channel (10), and the bottom of the discharge channel (10) is connected to a return pipe (9). An air nozzle (16) is provided on one side inside the drying tower (1). The air outlet of the return pipe (9) is connected to the air nozzle (16). An air inlet (12) is provided on the outer side of the return pipe (9) near the air nozzle (16).

2. The plasma-assisted spray drying equipment according to claim 1, characterized in that, The discharge channel (10) is equipped with a discharge valve (20), and a steam jet pump (17) is provided at one end of the return pipe (9) near the discharge channel (10).

3. The plasma-assisted spray drying equipment according to claim 1, characterized in that, Both the No. 1 feeding hopper (6) and the No. 2 feeding hopper (7) are provided with guide strips (18) on their inner sides.

4. The plasma-assisted spray drying equipment according to claim 1, characterized in that, A transparent observation window (8) is installed on the other side of the drying tower (1) by screws.

5. The plasma-assisted spray drying equipment according to claim 1, characterized in that, The bottom of the drying tower (1) is uniformly fixed with support columns (11).

6. The plasma-assisted spray drying equipment according to claim 1, characterized in that, The upper ends of both sides of the drying tower (1) are respectively fixed with mounting brackets (3).

Images