A cooling device for a spray dryer with condensation and liquid return function

Abstract

This utility model discloses a cooling device for a spray dryer with condensation and liquid return function, belonging to the technical field of spray drying equipment. It includes a spray dryer body, with a connecting pipe fixedly connected to the bottom of the spray dryer body. A first cyclone separator is fixedly connected to the outer wall of the connecting pipe, and an exhaust gas pipe is fixedly connected to the outer wall of the first cyclone separator. The first cyclone separator is fixedly connected to the outer wall of the spray dryer body via the exhaust gas pipe. This cooling device for a spray dryer with condensation and liquid return function, through the coordinated use of a collecting pipe, a cooling tank, a first liquid outlet pipe, a diverting pipe, a condenser body, and a second liquid outlet pipe, facilitates the treatment of the hot air discharged from the spray dryer body, recovering high-value soluble components evaporated during the drying process, avoiding resource waste, reducing raw material costs, and preventing high-temperature and high-humidity exhaust gas from damaging the equipment during subsequent processing.

Description

Technical Field

[0001] This utility model belongs to the technical field of spray drying equipment, specifically, it relates to a cooling device for a spray dryer with condensation and liquid return function. Background Technology

[0002] Spray drying is a continuous drying technology that rapidly converts liquid materials, such as solutions, suspensions, and emulsions, into dry powder or granules. Its core principle is to utilize atomization, hot air drying, and gas-solid separation.

[0003] However, during the drying process, high-value soluble components in the particulate solution, such as fragrance extracts and organic solvents, are directly emitted with the high-temperature and high-humidity exhaust gas, resulting in a decrease in raw material utilization and a significant increase in production costs. At the same time, the saturated wet exhaust gas enters the subsequent equipment without treatment, and the impeller of the induced draft fan is subjected to high-humidity corrosion and droplet impact, which leads to a shortened service life during long-term use and is prone to derivative failures such as bag clogging of the bag filter and water balance imbalance in the wet desulfurization system, exacerbating environmental compliance risks.

[0004] To address the aforementioned issues, this application proposes a cooling device for a spray dryer with a condensation and liquid return function. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a spray dryer cooling device with condensation and liquid return function to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cooling device for a spray dryer with condensation and liquid return function includes a spray dryer body. A connecting pipe is fixedly connected to the bottom of the spray dryer body. A first cyclone separator is fixedly connected to the outer wall of the connecting pipe. An exhaust gas pipe is fixedly connected to the outer wall of the first cyclone separator. The first cyclone separator is fixedly connected to the outer wall of the spray dryer body via the exhaust gas pipe. A second connecting separator is fixedly connected to the end of the connecting pipe away from the spray dryer body. An air outlet pipe is fixedly connected to the top of the first cyclone separator. A collecting pipe is fixedly connected to the outer wall of the air outlet pipe. A cooling tank is fixedly connected to the end of the collecting pipe away from the air outlet pipe. A first liquid outlet pipe is fixedly connected to the bottom of the cooling tank. A diverter pipe is fixedly connected to the bottom of the cooling tank. A condenser body is fixedly connected to the end of the diverter pipe away from the cooling tank. A second liquid outlet pipe is fixedly connected to the bottom of the condenser body.

[0008] Preferably, a conical hood is fixedly connected to the end of the exhaust pipe away from the first cyclone separator. The conical hood is located inside the spray dryer body and is coaxial with the spray dryer body. The conical hood facilitates the buffering of particles inside the spray dryer body, thereby improving separation efficiency.

[0009] Preferably, a sprayer is fixedly connected to the top of the spray dryer body, an air inlet pipe is fixedly connected to the outer side wall of the sprayer, and a heating box is fixedly connected to the end of the air inlet pipe away from the spray dryer body. A sealing cover is snapped onto the top of the heating box. By setting the sealing cover, it is convenient to observe and inspect the inside of the heating box.

[0010] Preferably, a heating rod is fixedly connected to the bottom of the sealing cover, and a fan is fixedly connected to the end of the heating box away from the air inlet pipe. By setting the heating rod and the fan, it is convenient to heat the air inside the heating box to improve the evaporation efficiency of moisture.

[0011] Preferably, a pull ring is fixedly connected to the top of the sealing cover, and the outer wall of the pull ring is coated with heat-insulating rubber. By setting the pull ring, it is convenient for operators to operate the sealing cover.

[0012] Preferably, the top of the sprayer is fixedly connected to a feed pipe, and the end of the feed pipe away from the main body of the spray dryer is fixedly connected to a high-pressure water pump. The water inlet of the high-pressure water pump is fixedly connected to a raw liquid tank. By setting up a high-pressure water pump and a raw liquid tank, it is convenient to extract the raw liquid inside the raw liquid tank.

[0013] In summary, the technical effects and advantages of this utility model are as follows: This spray dryer cooling device with condensation and liquid return function, through the coordinated use of a collecting pipe, a cooling tank, a first liquid outlet pipe, a diversion pipe, a condenser body, and a second liquid outlet pipe, facilitates the treatment of the hot air discharged from the spray dryer body, so as to recover the high-value soluble components evaporated during the drying process, avoid waste of resources, reduce raw material costs, and at the same time prevent high-temperature and high-humidity exhaust gas from damaging the equipment in subsequent processing.

[0014] By using the spray dryer body, conical hood, sprayer, air inlet pipe, and feed pipe in combination, it is easy to mix hot air with raw liquid. At the same time, the conical hood buffers the flow and prevents some incompletely evaporated raw liquid from directly entering the interior of the connecting pipe, thereby improving the drying efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cooling tank and related parts of this utility model;

[0017] Figure 3 This is a schematic diagram of the heating box and related parts of this utility model;

[0018] Figure 4 This is a schematic diagram of the conical cover and related parts of this utility model.

[0019] In the picture:

[0020] 1. Spray dryer main body; 2. First cyclone separator; 201. Exhaust gas pipe; 202. Conical hood; 203. Sprayer; 3. Air outlet pipe; 4. Second connecting separator; 5. Connecting pipe; 6. Collecting pipe; 7. Cooling tank; 8. First liquid outlet pipe; 9. Diverting pipe; 10. Condenser main body; 11. Second liquid outlet pipe; 12. Air inlet pipe; 13. Feed pipe; 14. Heating box; 15. Sealing cover; 16. Heating rod; 17. Pull ring; 18. Fan; 19. High-pressure water pump; 20. Raw material tank. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-3A cooling device for a spray dryer with condensation and liquid return function includes a spray dryer body 1. A connecting pipe 5 is fixedly connected to the bottom of the spray dryer body 1. A first cyclone separator 2 is fixedly connected to the outer wall of the connecting pipe 5. An exhaust gas pipe 201 is fixedly connected to the outer wall of the first cyclone separator 2. The first cyclone separator 2 is fixedly connected to the outer wall of the spray dryer body 1 through the exhaust gas pipe 201. The drying exhaust gas discharged from the spray dryer body 1 enters the interior of the first cyclone separator 2 tangentially through the exhaust gas pipe 201, forming a high-speed rotating airflow. Because the particles are denser than the gas, they are thrown against the wall of the container by centrifugal force. After colliding with the wall, the particles lose kinetic energy and slide down the conical wall to the bottom connecting pipe 5, where the drying exhaust gas undergoes preliminary separation. Further separation occurs inside the first cyclone separator 2. A second connecting separator 4 is fixedly connected to the end of the connecting pipe 5 away from the spray dryer body 1. Simultaneously, under the influence of the exhaust gas flow inside the spray dryer body 1, the dried particles from the spray dryer body 1 and the bottom of the first cyclone separator 2 enter the second connecting separator 4 through the connecting pipe 5 for further separation. To improve the separation efficiency of exhaust gas, the top of the first cyclone separator 2 is fixedly connected to an outlet pipe 3. After the exhaust gas is separated, the exhaust gas inside the first cyclone separator 2 and the second separator 4 is collected into the interior of the outlet pipe 3. The outer wall of the outlet pipe 3 is fixedly connected to a collecting pipe 6. The end of the collecting pipe 6 away from the outlet pipe 3 is fixedly connected to a cooling tank 7. The bottom of the cooling tank 7 is fixedly connected to a first liquid outlet pipe 8. Further high-heat and high-humidity exhaust gas enters the interior of the cooling tank 7 through the collecting pipe 6 and undergoes preliminary cooling inside the cooling tank 7. The bottom of the cooling tank 7... The condenser body 10 is fixedly connected to a diversion pipe 9. After initial cooling, the wastewater is discharged through the first liquid outlet pipe 8 and collected and recycled by the staff. Further, the initially cooled waste gas enters the interior of the condenser body 10 through the first liquid outlet pipe 8 and is cooled by the condenser body 10. The end of the diversion pipe 9 away from the cooling tank 7 is fixedly connected to the condenser body 10. The bottom of the condenser body 10 is fixedly connected to the second liquid outlet pipe 11. Finally, the water generated after the condenser body 10 is cooled is discharged through the second liquid outlet pipe 11 and collected and treated by the operators.

[0023] Reference Figure 4A conical hood 202 is fixedly connected to the end of the exhaust pipe 201 away from the first cyclone separator 2. The conical hood 202 is located inside the spray dryer body 1 and is coaxial with the spray dryer body 1. The conical hood 202 is inverted cone shape. When the hot and humid particulate water mist falls on the top of the conical hood 202, the conical hood 202 prolongs the residence time of the particles in the tower, especially for large particles or high humidity materials, so as to improve moisture evaporation and prevent undried large particles from falling directly to the bottom of the tower due to gravity, reducing the risk of wet material or sticking to the wall. At the same time, the inverted cone-shaped hood 202 intercepts radially splashed wet droplets, causing them to return to the high temperature airflow zone to continue drying, reducing wet sticking to the wall.

[0024] Reference Figure 4 A sprayer 203 is fixedly connected to the top of the spray dryer body 1. An air inlet pipe 12 is fixedly connected to the outer wall of the sprayer 203. A heating box 14 is fixedly connected to the end of the air inlet pipe 12 away from the spray dryer body 1. A sealing cover 15 is snapped onto the top of the heating box 14.

[0025] Reference Figure 1 and Figure 3 A heating rod 16 is fixedly connected to the bottom of the sealing cover 15. A fan 18 is fixedly connected to the end of the heating box 14 away from the air inlet pipe 12. When in use, the fan 18 draws outside air into the interior of the heating box 14. At this time, the heating rod 16 heats the air inside the heating box 14. Furthermore, under the action of the fan 18, the air enters the interior of the sprayer 203 through the air inlet pipe 12.

[0026] Reference Figure 3 A pull ring 17 is fixedly connected to the top of the sealing cover 15. There are two pull rings 17, which are located at the top two ends of the sealing cover 15 and are symmetrically distributed. The outer wall of the pull ring 17 is coated with heat-insulating rubber. During use, the operator can disassemble the sealing cover 15 through the two pull rings 17 to observe and inspect the inside of the heating box 14.

[0027] Reference Figure 1 and Figure 4 The top of the sprayer 203 is fixedly connected to the feed pipe 13, and the end of the feed pipe 13 away from the main body 1 of the spray dryer is fixedly connected to the high-pressure water pump 19. The water inlet end of the high-pressure water pump 19 is fixedly connected to the raw liquid tank 20.

[0028] Working principle:

[0029] During operation, a high-pressure water pump 19 draws the particulate-containing solution from the stock solution tank 20 and introduces it into the sprayer 203 through the feed pipe 13. Simultaneously, a fan 18 draws in external air. As the air passes through the heating chamber 14, it is heated by a heating rod 16 and then transported through the air inlet pipe 12. When the hot air and the particulate-containing solution converge at the sprayer 203, the sprayer 203 atomizes and sprays the hot air and particulate-containing solution. When the sprayed material enters the main body 1 of the spray dryer, the particulate-containing solution and the hot air... The increased contact area between the air and the water in the solution leads to evaporation. Meanwhile, since the conical hood 202 is located inside the spray dryer body 1 and is coaxial with the spray dryer body 1, large particles or high-humidity materials will remain at the top of the conical hood 202 when falling inside the spray dryer body 1. The conical hood 202 buffers the large particles or high-humidity materials, slowing down their falling speed, thereby improving the evaporation efficiency of water in the large particles or high-humidity materials and preventing undried large particles from falling directly to the bottom of the spray dryer body 1 due to gravity.

[0030] After drying by the spray dryer body 1, the high-humidity, high-heat exhaust gas inside the spray dryer body 1 enters the first cyclone separator 2 through the conical hood 202. Simultaneously, a portion of the high-humidity, high-heat exhaust gas carries solid particles through the connecting pipe 5 at the bottom of the spray dryer body 1 into the second connecting separator 4. After entering the first cyclone separator 2 through the conical hood 202, the high-humidity, high-heat exhaust gas undergoes centrifugal separation. The separated particles fall into the connecting pipe 5 to move synchronously with the exhaust gas discharged from the spray dryer body 1. Upon reaching the second connecting separator 4, further separation is performed to improve separation efficiency. The first cyclone separator 2 and... The high-humidity and high-heat exhaust gas separated inside the second connecting separator 4 enters the interior of the air outlet duct 3 from the top of both, and simultaneously enters the interior of the cooling tank 7 through the collecting pipe 6. As the high-humidity and high-heat air enters the cooling tank 7 through the collecting pipe 6, it diffuses inside the cooling tank 7, thereby achieving preliminary cooling. The water generated after cooling is discharged through the first liquid outlet pipe 8, and the operator can collect and treat it after discharge. The high-temperature and high-humidity gas after preliminary cooling then enters the interior of the condenser body 10 through two diversion pipes 9, and is finally cooled by the condenser body 10. The water generated after cooling is discharged through the second liquid outlet pipe 11, which is convenient for the operator to collect. The cooled exhaust gas is discharged from one end of the condenser body 10 for subsequent treatment.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spray dryer cooling device with condensation return liquid function, comprising a spray dryer main body (1), characterized in that, The bottom of the spray dryer body (1) is fixedly connected to a connecting pipe (5). A first cyclone separator (2) is fixedly connected to the outer wall of the connecting pipe (5). An exhaust pipe (201) is fixedly connected to the outer wall of the first cyclone separator (2). The first cyclone separator (2) is fixedly connected to the outer wall of the spray dryer body (1) via the exhaust pipe (201). A second connecting separator (4) is fixedly connected to the end of the connecting pipe (5) away from the spray dryer body (1). The first cyclone separator (2)... An air outlet pipe (3) is fixedly connected to the top, and a collecting pipe (6) is fixedly connected to the outer wall of the air outlet pipe (3). A cooling tank (7) is fixedly connected to the end of the collecting pipe (6) away from the air outlet pipe (3). A first liquid outlet pipe (8) is fixedly connected to the bottom of the cooling tank (7). A diversion pipe (9) is fixedly connected to the bottom of the cooling tank (7). A condenser body (10) is fixedly connected to the end of the diversion pipe (9) away from the cooling tank (7). A second liquid outlet pipe (11) is fixedly connected to the bottom of the condenser body (10).

2. The cooling device of a spray dryer with condensation return liquid function according to claim 1, characterized in that, The end of the exhaust pipe (201) away from the first cyclone separator (2) is fixedly connected to a conical hood (202). The conical hood (202) is located inside the spray dryer body (1) and is coaxial with the spray dryer body (1).

3. The cooling device of a spray dryer with condensation return liquid function according to claim 1, characterized in that, A sprayer (203) is fixedly connected to the top of the spray dryer body (1). An air inlet pipe (12) is fixedly connected to the outer side wall of the sprayer (203). A heating box (14) is fixedly connected to the end of the air inlet pipe (12) away from the spray dryer body (1). A sealing cover (15) is snapped onto the top of the heating box (14).

4. The cooling device of a spray dryer with condensation return liquid function according to claim 3, characterized in that, A heating rod (16) is fixedly connected to the bottom of the sealing cover (15), and a fan (18) is fixedly connected to the end of the heating box (14) away from the air inlet pipe (12).

5. A spray dryer cooling device with condensation return liquid function according to claim 4, characterized in that, A pull ring (17) is fixedly connected to the top of the sealing cap (15), and the outer wall of the pull ring (17) is coated with heat-insulating rubber.

6. The cooling device of a spray dryer with condensation return liquid function according to claim 3, characterized in that, The top of the sprayer (203) is fixedly connected to a feed pipe (13), and the end of the feed pipe (13) away from the main body (1) of the spray dryer is fixedly connected to a high-pressure water pump (19), and the water inlet of the high-pressure water pump (19) is fixedly connected to a raw liquid tank (20).

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