Alcohol recovery device of rake dryer

Abstract

The utility model belongs to the field of ethanol recovery equipment, in particular to an ethanol recovery device of a rake dryer, which comprises a recovery bin, a collection hopper is fixedly mounted on the inner side of the recovery bin, the inner space of the recovery bin is divided into a condensation chamber and an evaporation chamber by the collection hopper, the condensation chamber is positioned above the evaporation chamber, and the evaporation chamber is positioned above the condensation chamber. The outer side of the recycling bin is fixedly sleeved with an electromagnetic heater; and a condensation pipeline is fixedly mounted on the inner side of the condensation chamber. According to the utility model, the corresponding stirring blades can be driven to rotate, so that a medium in the equipment flows more uniformly, a local low-temperature or overheat area caused by non-uniform flow velocity is avoided, heat exchange dead angles are reduced, and the condenser and the evaporation bin are integrated, so that the process of conveying condensate into the evaporation equipment after condensation of the traditional equipment is omitted, and the production efficiency is improved. And the conditions that residual condensate in the pipeline cannot be completely conveyed to evaporation equipment, material loss is caused by long-term accumulation, and the overall recovery rate is reduced are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of ethanol recovery equipment, and in particular to an ethanol recovery device for a rake dryer. Background Technology

[0002] The ethanol recovery unit for rake dryers is a solvent recovery device adapted to the rake drying process, specifically designed to recover ethanol volatilized during the drying process. It connects to the dryer chamber via a sealed pipeline and uses a negative pressure system to collect ethanol-containing exhaust gas. The ethanol vapor is condensed into a liquid mixture by a condenser, and then purified through a distillation column or separator to obtain high-purity ethanol. The unit employs indirect heating to ensure explosion-proof safety and is equipped with gas-liquid separation and exhaust gas purification components, achieving ethanol resource recycling and environmentally friendly emissions. It is widely used in pharmaceutical, chemical, and other applications requiring the drying of ethanol-containing materials.

[0003] However, existing equipment for ethanol recovery often suffers from uneven temperature distribution in its condensers. Localized low-temperature areas can impede the flow of the condensing medium (such as cooling water), creating a "dead water layer" that weakens the heat exchange rate. Conversely, localized overheating areas may cause vapor to escape before it is fully condensed, resulting in incomplete condensation and reduced solvent (such as ethanol) recovery rates. Furthermore, existing equipment often requires transporting the condensate to an evaporator for evaporation. During this process, residual condensate in the pipelines may not be fully delivered to the evaporator, leading to material loss over time. This is especially problematic for high-value solvents (such as pharmaceutical-grade ethanol), reducing the overall recovery rate.

[0004] Therefore, we propose an ethanol recovery device for a rake dryer to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An ethanol recovery device for a rake dryer includes a recovery chamber. A collection hopper is fixedly installed on the inner side of the recovery chamber. The internal space of the recovery chamber is divided into a condensation chamber and an evaporation chamber by the collection hopper. The condensation chamber is located above the evaporation chamber. An electromagnetic heater is fixedly sleeved on the outer side of the recovery chamber, and the electromagnetic heater is set in the evaporation chamber area of ​​the recovery chamber. A condensation pipe is fixedly installed on the inner side of the condensation chamber. A brass heat exchange box is fixedly installed on one side of the recovery chamber, and both ends of the condensation pipe extend into the brass heat exchange box.

[0007] Specifically, a circulation pump is fixedly installed on the bottom inner wall of the brass heat exchange box, and a connector is fixedly installed on the output end of the circulation pump. One end of the connector is fixedly connected to one end of the condensing pipe, and a circulation head is fixedly installed on the other end of the condensing pipe.

[0008] Specifically, an inlet shell is fixedly installed inside the top inlet of the recycling bin. A stirring chamber is opened inside the inlet shell. A drive bevel gear is rotatably installed on one inner wall of the stirring chamber. A forward bevel gear and a reverse bevel gear are rotatably installed on the upper and lower inner walls of the stirring chamber, respectively. The drive bevel gear meshes with the forward bevel gear and the reverse bevel gear, so as to drive the forward bevel gear and the reverse bevel gear to rotate through the drive bevel gear.

[0009] Specifically, a reverse shaft is fixedly installed at the bottom of the reverse bevel gear, and the reverse shaft extends into the condensation chamber. A forward shaft is fixedly installed at the bottom of the forward bevel gear, and the forward shaft rotates through the reverse shaft. Two stirring blades are fixedly sleeved on the outer sides of both the forward and reverse shafts, so that the forward and reverse shafts can drive the corresponding two stirring blades to rotate.

[0010] Specifically, the inside of the feed housing is provided with a motor slot, and a servo motor is fixedly installed on the inner side of the motor slot. The output shaft of the servo motor is fixedly connected to the active bevel gear, and the active bevel gear can be driven to rotate by the servo motor.

[0011] Specifically, an ascending bucket is fixedly installed inside the recycling bin, the ascending bucket is located below the collection hopper, and a recycling pipe is fixedly installed on the top of the ascending bucket, with one end of the recycling pipe extending out of the recycling bin.

[0012] Specifically, a one-way pipe is fixedly installed on the inner side of the collection hopper, the one-way pipe is connected to the recovery pipe, and a sealing ring is fixedly installed on the inner side of the one-way pipe.

[0013] Specifically, a closed sphere is slidably installed on the inner side of the one-way pipe, and an arc-shaped plate is fixedly installed on the bottom of the closed sphere. The closed sphere abuts against the sealing ring, which facilitates the sealing of the one-way pipe and prevents ethanol vapor from flowing back into the condensation chamber.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the forward and reverse shafts, the corresponding stirring blades can be driven to rotate, making the medium flow inside the equipment more uniform, avoiding the formation of local low temperature or overheating areas due to uneven flow velocity, reducing heat exchange dead zones, and integrating the condenser and evaporation chamber, eliminating the process of transporting condensate to the evaporation equipment after condensation in traditional equipment, avoiding the situation where residual condensate in the pipeline cannot be completely transported to the evaporation equipment, and long-term accumulation will cause material loss and reduce the overall recovery rate. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an ethanol recovery device for a rake dryer proposed in this utility model;

[0016] Figure 2 This is a three-dimensional cross-sectional view of an ethanol recovery device for a rake dryer proposed in this utility model;

[0017] Figure 3 This is a three-dimensional cross-sectional view of the evaporation chamber of an ethanol recovery device for a rake dryer proposed in this utility model.

[0018] Figure 4 This is a three-dimensional cross-sectional view of the condenser pipe and brass heat exchange box of an ethanol recovery device for a rake dryer proposed in this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram showing the forward shaft, reverse shaft, and stirring blades of an ethanol recovery device for a rake dryer proposed in this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram showing the recovery pipe, one-way pipe, and closed sphere of an ethanol recovery device for a rake dryer proposed in this utility model.

[0021] In the diagram: 1. Recovery bin; 2. Electromagnetic heater; 3. Condensation pipe; 4. Connector; 5. Circulation head; 6. Circulation pump; 7. Brass heat exchanger; 8. Collection hopper; 9. Lifting hopper; 10. Feeding shell; 11. Servo motor; 12. Drive bevel gear; 13. Forward bevel gear; 14. Forward shaft; 15. Reverse bevel gear; 16. Reverse shaft; 17. Stirring blade; 18. Recovery pipe; 19. One-way pipe; 20. Sealing ring; 21. Enclosed sphere; 22. Arc plate. Detailed Implementation

[0022] Reference Figure 1-6 An ethanol recovery device for a rake dryer includes a recovery chamber 1. A collection hopper 8 is fixedly installed on the inner side of the recovery chamber 1. The internal space of the recovery chamber 1 is divided into a condensation chamber and an evaporation chamber by the collection hopper 8. The condensation chamber is located above the evaporation chamber. An electromagnetic heater 2 is fixedly sleeved on the outer side of the recovery chamber 1. The electromagnetic heater 2 is set in the evaporation chamber area of ​​the recovery chamber 1. A condensation pipe 3 is fixedly installed on the inner side of the condensation chamber. A brass heat exchange box 7 is fixedly installed on one side of the recovery chamber 1. Both ends of the condensation pipe 3 extend into the brass heat exchange box 7.

[0023] In this embodiment, a circulation pump 6 is fixedly installed on the bottom inner wall of the brass heat exchange box 7, and a connector 4 is fixedly installed on the output end of the circulation pump 6. One end of the connector 4 is fixedly connected to one end of the condensing pipe 3, and a circulation head 5 is fixedly installed on the other end of the condensing pipe 3.

[0024] In this embodiment, a feeding shell 10 is fixedly installed on the inner side of the top feeding port of the recycling bin 1. A stirring chamber is opened inside the feeding shell 10. A drive bevel gear 12 is rotatably installed on one inner wall of the stirring chamber. A forward bevel gear 13 and a reverse bevel gear 15 are rotatably installed on the upper and lower inner walls of the stirring chamber, respectively. The drive bevel gear 12 meshes with the forward bevel gear 13 and the reverse bevel gear 15, so that the forward bevel gear 13 and the reverse bevel gear 15 can be rotated by the drive bevel gear 12.

[0025] In this embodiment, a reverse shaft 16 is fixedly installed at the bottom of the reverse bevel gear 15, and the reverse shaft 16 extends into the condensation chamber. A forward shaft 14 is fixedly installed at the bottom of the forward bevel gear 13, and the forward shaft 14 rotates through the reverse shaft 16. Two stirring blades 17 are fixedly sleeved on the outer sides of both the forward shaft 14 and the reverse shaft 16, so that the forward shaft 14 and the reverse shaft 16 can drive the corresponding two stirring blades 17 to rotate.

[0026] In this embodiment, a motor slot is provided inside the feed housing 10, and a servo motor 11 is fixedly installed on the inner side of the motor slot. The output shaft of the servo motor 11 is fixedly connected to the active bevel gear 12, and the active bevel gear 12 can be driven to rotate by the servo motor 11.

[0027] In this embodiment, a rising bucket 9 is fixedly installed on the inner side of the recycling bin 1. The rising bucket 9 is located below the collecting hopper 8. A recycling pipe 18 is fixedly installed on the top of the rising bucket 9. One end of the recycling pipe 18 extends out of the recycling bin 1.

[0028] In this embodiment, a one-way pipe 19 is fixedly installed on the inner side of the collecting hopper 8. The one-way pipe 19 is connected to the recycling pipe 18, and a sealing ring 20 is fixedly installed on the inner side of the one-way pipe 19.

[0029] In this embodiment, a closed sphere 21 is slidably installed on the inner side of the one-way pipe 19, and an arc plate 22 is fixedly installed on the bottom of the closed sphere 21. The closed sphere 21 abuts against the sealing ring 20, which facilitates the sealing of the one-way pipe 19 and prevents ethanol vapor from flowing back into the condensation chamber.

[0030] Working Principle: When recovering ethanol from the exhaust gas of a rake dryer, the operator introduces the exhaust gas into the condensation chamber of recovery compartment 1 and starts the circulation pump 6. The circulation pump 6 pumps the coolant from the brass heat exchanger 7 through connector 4 into the condensation pipe 3. Simultaneously, the servo motor 11 starts, driving the active bevel gear 12 to rotate. The rotation of the active bevel gear 12 drives the forward bevel gear 13 and the reverse bevel gear 15 to rotate. The rotation of the forward bevel gear 13 drives the forward shaft 14 to rotate clockwise, and the rotation of the reverse bevel gear 15 drives the reverse shaft 16 to rotate counterclockwise. The forward shaft 14 and the reverse shaft 16 respectively drive the corresponding two stirring blades 17 to rotate, making the exhaust gas flow more evenly in the condensation chamber, avoiding the formation of local low temperature or overheat areas due to uneven flow velocity, and reducing heat exchange dead zones. Ethanol vapor in the gas is condensed into liquid and falls. The condensate enters the one-way pipe 19 through the collection hopper 8. At this time, the liquid exerts pressure on the closed sphere 21, and the closed sphere 21, together with the arc plate 22, descends. The condensate then flows into the evaporation chamber. When all the condensate has entered the evaporation chamber, the electromagnetic heater 2 is activated to heat the evaporation chamber. The condensate evaporates due to the heat, and the ethanol vapor rises. Water and high-boiling-point impurities remain in the evaporation chamber and are subsequently discharged as waste liquid. The rising ethanol vapor enters the recovery pipe 18 through the rising hopper 9, pushing the arc plate 22 and the closed sphere 21. The closed sphere 21 contacts the sealing ring 20 to seal the one-way pipe 19, preventing the ethanol vapor from flowing back into the condensation chamber. The ethanol vapor is discharged through the recovery pipe 18 and enters the subsequent process.

[0031] The technological advancements of this invention compared to existing technologies are as follows: it can drive the corresponding stirring blades 17 to rotate, making the medium flow inside the equipment more uniform, avoiding the formation of local low-temperature or overheated areas due to uneven flow rates, reducing heat exchange dead zones, and integrating the condenser and evaporation chamber, eliminating the traditional process of transporting condensate to the evaporation equipment after condensation, thus avoiding the situation where residual condensate in the pipes cannot be completely transported to the evaporation equipment, which would cause material loss and reduce the overall recovery rate over a long period of time.

Claims

1. An ethanol recovery device for a rake dryer, characterized in that, The system includes a recycling bin (1), on the inner side of which a collection hopper (8) is fixedly installed. The internal space of the recycling bin (1) is divided into a condensation chamber and an evaporation chamber by the collection hopper (8). The condensation chamber is located above the evaporation chamber. An electromagnetic heater (2) is fixedly sleeved on the outer side of the recycling bin (1). The electromagnetic heater (2) is set in the evaporation chamber area of ​​the recycling bin (1). A condensing pipe (3) is fixedly installed on the inner side of the condensing chamber, and a brass heat exchange box (7) is fixedly installed on one side of the recovery chamber (1). Both ends of the condensing pipe (3) extend into the brass heat exchange box (7).

2. The ethanol recovery device for a rake dryer according to claim 1, characterized in that, A circulation pump (6) is fixedly installed on the bottom inner wall of the brass heat exchange box (7). A connector (4) is fixedly installed on the output end of the circulation pump (6). One end of the connector (4) is fixedly connected to one end of the condensing pipe (3). A circulation head (5) is fixedly installed on the other end of the condensing pipe (3).

3. The ethanol recovery device for a rake dryer according to claim 1, characterized in that, The top inlet of the recycling bin (1) is fixedly installed with an inlet shell (10). The inlet shell (10) has a stirring chamber inside. An active bevel gear (12) is rotatably installed on one side of the inner wall of the stirring chamber. A forward bevel gear (13) and a reverse bevel gear (15) are rotatably installed on the upper and lower inner walls of the stirring chamber, respectively. The active bevel gear (12) meshes with the forward bevel gear (13) and the reverse bevel gear (15).

4. The ethanol recovery device for a rake dryer according to claim 3, characterized in that, The bottom of the reverse bevel gear (15) is fixedly installed with a reverse shaft (16), which extends into the condensation chamber. The bottom of the forward bevel gear (13) is fixedly installed with a forward shaft (14), which rotates through the reverse shaft (16). Two stirring blades (17) are fixedly sleeved on the outer sides of both the forward shaft (14) and the reverse shaft (16).

5. The ethanol recovery device for a rake dryer according to claim 4, characterized in that, The feed housing (10) has a motor slot inside, and a servo motor (11) is fixedly installed on the inner side of the motor slot. The output shaft of the servo motor (11) is fixedly connected to the active bevel gear (12).

6. The ethanol recovery device for a rake dryer according to claim 1, characterized in that, An ascending bucket (9) is fixedly installed on the inner side of the recycling bin (1). The ascending bucket (9) is located below the collecting hopper (8). A recycling pipe (18) is fixedly installed on the top of the ascending bucket (9). One end of the recycling pipe (18) extends out of the recycling bin (1).

7. The ethanol recovery device for a rake dryer according to claim 6, characterized in that, A one-way pipe (19) is fixedly installed on the inner side of the collection hopper (8). The one-way pipe (19) is connected to the recovery pipe (18). A sealing ring (20) is fixedly installed on the inner side of the one-way pipe (19).

8. The ethanol recovery device for a rake dryer according to claim 7, characterized in that, A closed sphere (21) is slidably installed on the inner side of the one-way pipe (19), and an arc plate (22) is fixedly installed on the bottom of the closed sphere (21). The closed sphere (21) abuts against the sealing ring (20).

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