A solvent recovery device

Abstract

The application discloses a solvent recovery device, and belongs to the field of solvent recovery.The solvent recovery device comprises a device main body and a storage tank fixedly arranged at the bottom of the device main body, three layers of cavities are arranged in the device main body, and the three layers of cavities are an outer cold water layer and an inner cold water layer; a collecting chamber is arranged between the outer cold water layer and the inner cold water layer, and the collecting chamber is communicated with the storage tank; two spiral condensing pipelines are arranged in the outer cold water layer; a plurality of flow guide plates are arranged in the collecting chamber; a microfluid channel is arranged in the flow guide plate; and the two ends of the microfluid channel are communicated with the outer cold water layer and the inner cold water layer through pipelines. The outer cold water layer and the inner cold water layer are communicated through the microfluid channel, water circulation is realized, the utilization rate of the cooling medium is improved, and the energy consumption is reduced; meanwhile, when the gas contacts the flow guide plate, the cooling medium in the microfluid channel can condense the gas again, the condensing effect is improved, the loss of the solvent is reduced, and the solvent recovery efficiency and purity are improved.

Description

Technical Field

[0001] This application relates to the field of solvent recovery technology, specifically a solvent recovery device. Background Technology

[0002] In industrial production, solvents are widely used as important raw materials or auxiliary materials in various industries such as metallurgical powder processing, chemicals, and pharmaceuticals. However, the large-scale use of solvents not only increases production costs, but also pollutes the environment and wastes resources if the waste gases generated by their volatilization are directly emitted. Therefore, solvent recovery devices, as key equipment for realizing solvent recycling, reducing energy consumption, and minimizing pollution, occupy an indispensable position in industrial production.

[0003] To improve solvent recovery efficiency, various solvent recovery devices have emerged in the prior art. For example, Chinese utility model patent CN222709015U discloses a solvent recovery device that extends the condensation path of the gas in the outer cold water layer by adopting a spiral condensation pipe design. At the same time, a guide plate is set to make the gas spiral upward when entering the collection chamber to achieve secondary condensation, thereby improving the condensation recovery efficiency.

[0004] However, in practical applications, when the gas spirals upward along the guide plate in the collection chamber, most of the gas only contacts the guide plate, and only a small amount of gas can contact the outer and inner cooling water layers. This results in a limited contact area between the gas and the cooling medium, leading to insufficient condensation. The treated gas still contains water droplets, which not only affects the purity of the recovered solvent but also causes some solvent loss, making it difficult to meet the industrial production demand for efficient and thorough solvent recovery.

[0005] Therefore, this application provides a solvent recovery device to solve the above-mentioned problems. Utility Model Content

[0006] This application provides a solvent recovery device, which aims to solve the problems mentioned in the background art, such as the small contact area between the gas and the outer and inner cooling water layers, resulting in low solvent recovery purity.

[0007] To achieve the above objectives, this application provides the following technical solution: a solvent recovery device, comprising a device body and a storage tank fixedly disposed at the bottom of the device body. The device body has three cavities: an outer cooling water layer and an inner cooling water layer. A collection chamber is located between the outer cooling water layer and the inner cooling water layer, and the collection chamber is connected to the storage tank. An exhaust port is provided at the top of the collection chamber. Two spiral condensation pipes are disposed within the outer cooling water layer. One end of each condensation pipe passes through the outer cooling water layer and connects to the bottom of the collection chamber, while the other end exits the device body and connects to an external pump. Multiple guide plates are disposed within the collection chamber. Each guide plate is composed of multiple inclined plates. Microfluidic channels are formed inside each guide plate, and both ends of each microfluidic channel are connected to the outer cooling water layer and the inner cooling water layer via pipes. When gas passes through the guide plates, the guide plates condense the gas again. The two ends of the microfluidic channel are connected to the outer and inner cooling water layers through pipes, respectively, so that the cooling medium in the outer cooling water layer can flow into the microfluidic channel and then into the inner cooling water layer to form a water circulation. When the gas rises in the collection chamber and passes through the guide plate, the gas comes into contact with the guide plate. The guide plate is kept at a low temperature because there is a cooling medium in the internal microfluidic channel, thereby condensing the solvent vapor in the gas, liquefying the solvent vapor, and realizing the re-condensation and recovery.

[0008] Preferably, the microfluidic channels are distributed in a honeycomb or grid pattern and cover the heated area of ​​the guide plate. The honeycomb or grid-like distribution of the microfluidic channels can maximize the coverage of the heated area of ​​the guide plate, so that all parts of the guide plate can be fully cooled, thereby enhancing the condensation effect of the guide plate on the gas.

[0009] Preferably, the outer cooling water layer has an inlet at its bottom and the inner cooling water layer has an outlet at its top. The inlet facilitates the replenishment of cooling medium into the outer cooling water layer, the inner cooling water layer, and the microfluidic channel, while the outlet facilitates the discharge of cooling medium that has absorbed heat from these layers. This ensures a continuous supply and renewal of the cooling medium, maintains the cooling effect of the outer and inner cooling water layers, ensures the stable operation of the condensation process, and improves the reliability and continuity of the solvent recovery device.

[0010] Preferably, the storage tank has an opening at the bottom, and a valve is installed at the opening. The opening facilitates the discharge of solvent collected in the storage tank, making it convenient for subsequent processing and reuse of the recovered solvent; the valve can control the opening and closing of the opening, allowing solvent to be discharged as needed, while closing the valve when drainage is not required to prevent solvent leakage, thus ensuring the normal operation of the storage tank and the safe storage of the solvent.

[0011] Preferably, to increase the rising speed of the gas within the collection chamber, the collection chamber is cone-shaped, wider at the bottom and narrower at the top. The cone shape causes the space to gradually decrease as the gas rises, accelerating its ascent, shortening its residence time within the chamber, and improving processing efficiency. Simultaneously, the increased rising speed allows for more thorough contact with the outer and inner cooling water layers, increasing the contact area and improving the condensation effect, thereby enhancing solvent recovery efficiency.

[0012] Preferably, to capture water droplets in the gas, the solvent recovery device further includes a wire mesh demister fixedly installed at the top of the collection chamber. The wire mesh demister can effectively capture water droplets carried in the gas, preventing water droplets from being discharged from the exhaust port with the gas, improving the purity of the recovered solvent and reducing solvent loss; at the same time, it reduces the moisture content in the exhaust gas, reducing the impact on the environment and making the solvent recovery device more environmentally friendly and efficient.

[0013] The external and internal cooling water layers of this application are connected through a microfluidic channel, realizing water circulation, improving the utilization rate of the cooling medium, and reducing energy consumption. At the same time, when the gas comes into contact with the guide plate, the cooling medium in the microfluidic channel can condense the gas again, increasing the condensation effect, reducing solvent loss, and improving solvent recovery efficiency and purity.

[0014] The cone-shaped collection chamber of this application gradually reduces the space as the gas rises, accelerating the gas's ascent speed, shortening the gas's residence time in the collection chamber, and improving processing efficiency. At the same time, the increased gas ascent speed allows for more thorough contact with the outer and inner cooling water layers, increasing the contact area, improving the condensation effect, and thus improving solvent recovery efficiency.

[0015] The wire mesh demister of this application can effectively capture water droplets carried in the gas, preventing water droplets from being discharged from the exhaust port with the gas, thereby improving the purity of the recovered solvent and reducing solvent loss. At the same time, it reduces the moisture content in the exhaust gas, reducing the impact on the environment and making the solvent recovery device more environmentally friendly and efficient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a solvent recovery device.

[0017] Figure 2 This is a schematic diagram of the internal structure of the main body of the device;

[0018] Figure 3 This is a schematic diagram of the internal structure of the air deflector;

[0019] Figure 4 A top view of the structure of the baffle plate inside the collection room.

[0020] In the picture:

[0021] 1. Main body of the device; 11. External cooling water layer; 111. Liquid inlet; 12. Internal cooling water layer; 121. Liquid outlet; 13. Collection chamber; 131. Exhaust port; 2. Storage tank; 3. Condensation pipe; 4. Baffle plate; 41. Microfluidic channel; 5. Wire mesh demister. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] Example 1

[0024] This embodiment provides a solvent recovery device, such as... Figure 1-4 As shown, the solvent recovery device includes a main body 1 and a storage tank 2 fixedly installed at the bottom of the main body 1. The main body 1 has three cavities: an outer cooling water layer 11 and an inner cooling water layer 12. A collection chamber 13 is located between the outer cooling water layer 11 and the inner cooling water layer 12, and the collection chamber 13 is connected to the storage tank 2. An exhaust port 131 is provided at the top of the collection chamber 13. Two spiral condensation pipes 3 are provided in the outer cooling water layer 11. One end of the condensation pipe 3 passes through the outer cooling water layer 11 and is connected to the bottom of the collection chamber 13, and the other end passes through the main body 1 and is connected to an external pump. Multiple guide plates 4 are provided in the collection chamber 13. The guide plates 4 are composed of multiple inclined plates. Microfluidic channels 41 are opened inside the guide plates 4. Both ends of the microfluidic channels 41 are connected to the outer cooling water layer 11 and the inner cooling water layer 12 through pipes. When gas passes through the guide plates 4, the guide plates 4 condense the gas again. The outer cooling water layer 11 and the inner cooling water layer 12 are connected through a microfluidic channel 41, realizing water circulation, improving the utilization rate of the cooling medium, and reducing energy consumption. Simultaneously, when the gas contacts the guide plate 4, the cooling medium within the microfluidic channel 41 can re-condense the gas, increasing the condensation effect, reducing solvent loss, and improving solvent recovery efficiency and purity. The two ends of the microfluidic channel 41 are connected to the outer cooling water layer 11 and the inner cooling water layer 12 respectively through pipes, allowing the cooling medium in the outer cooling water layer 11 to flow into the microfluidic channel 41 and then into the inner cooling water layer 12, forming a water circulation. When the gas rises in the collection chamber 13 and passes through the guide plate 4, the gas contacts the guide plate 4. The guide plate 4 maintains a low temperature due to the cooling medium within the microfluidic channel 41, thereby condensing the solvent vapor in the gas, liquefying the solvent vapor, and achieving re-condensation and recovery.

[0025] The microfluidic channels 41 are distributed in a honeycomb or mesh pattern and cover the heated area of ​​the guide plate 4. This honeycomb or mesh distribution maximizes the coverage of the heated area of ​​the guide plate 4, ensuring sufficient cooling of all parts of the guide plate 4 and enhancing its condensation effect on the gas. The honeycomb or mesh distribution allows the microfluidic channels 41 to be uniformly and densely distributed within the guide plate 4, covering its heated area. When the cooling medium flows within the microfluidic channels 41, it can exchange heat sufficiently with the guide plate 4, maintaining a low overall temperature. When gas passes through the guide plate 4, the contact area increases, allowing the solvent vapor in the gas to be more fully condensed into liquid, achieving complete condensation.

[0026] The outer cooling water layer 11 has an inlet 111 at its bottom, and the inner cooling water layer 12 has an outlet 121 at its top. The inlet 111 facilitates the replenishment of cooling medium into the outer cooling water layer 11, the inner cooling water layer 12, and the microfluidic channel 41, while the outlet 121 facilitates the discharge of cooling medium that has absorbed heat from the outer cooling water layer 11, the inner cooling water layer 12, and the microfluidic channel 41. This ensures a continuous supply and renewal of the cooling medium, maintains the cooling effect of the outer cooling water layer 11 and the inner cooling water layer 12, ensures the stable operation of the condensation process, and improves the reliability and continuity of the solvent recovery device. External cooling medium (such as cold water) can be introduced into the outer cold water layer 11, the microfluidic channel 41, and the inner cold water layer 12 through the liquid inlet 111, providing a cooling source for the outer cold water layer 11. After the cooling medium in the outer cold water layer 11 exchanges heat with the condensing pipe 3 and the microfluidic channel 41, part of it will flow into the inner cold water layer 12. The cooling medium in the inner cold water layer 12 absorbs heat and its temperature rises. It is then discharged through the liquid outlet 121 at the top, thereby realizing the circulation and renewal of the cooling medium, maintaining the low temperature state of the outer cold water layer 11 and the inner cold water layer 12, and ensuring condensation efficiency.

[0027] Storage tank 2 has an opening at its bottom, with a valve at the opening. The opening facilitates the discharge of solvent collected in storage tank 2, enabling subsequent processing and reuse of the recovered solvent. The valve controls the opening and closing of the opening, allowing solvent to be discharged as needed, while closing the valve when drainage is not required prevents solvent leakage, ensuring the normal operation of storage tank 2 and the safe storage of solvent. Storage tank 2 is connected to collection chamber 13, where condensed solvent flows into storage tank 2 for storage by gravity. When solvent needs to be discharged, the valve is opened, and the solvent in storage tank 2 flows out through the opening at the bottom under gravity. When drainage is not required, the valve is closed, sealing the opening and preventing solvent outflow, thus achieving effective storage and controlled discharge of solvent.

[0028] To increase the rising speed of the gas within the collection chamber 13, the chamber is cone-shaped, wider at the bottom and narrower at the top. This cone shape causes the space to gradually decrease as the gas rises, accelerating its ascent, shortening its residence time, and improving processing efficiency. Simultaneously, the increased rising speed allows for more thorough contact with the outer and inner cooling water layers 11 and 12, increasing the contact area and enhancing the condensation effect, thereby improving solvent recovery efficiency. Because the collection chamber 13 is cone-shaped with a larger bottom and a smaller top, the gas flow rate gradually increases as the space narrows as it rises from the bottom. This increased flow rate allows for more thorough contact between the gas and the inner walls of the outer cooling water layer 11 and the outer walls of the inner cooling water layer 12, increasing the contact opportunities and area between the gas and the cooling medium. This results in more solvent vapor being condensed into liquid, improving the condensation and recovery effect.

[0029] Example 2

[0030] Unlike Example 1, to capture water droplets in the gas, the solvent recovery device also includes a wire mesh demister 5 fixedly installed at the top of the collection chamber 13. The wire mesh demister 5 effectively captures water droplets carried in the gas, preventing them from being discharged from the exhaust port 131, thus improving the purity of the recovered solvent and reducing solvent loss. Simultaneously, it reduces the moisture content in the discharged gas, minimizing environmental impact and making the solvent recovery device more environmentally friendly and efficient. The wire mesh demister 5 is composed of multiple layers of metal wire mesh, possessing a large surface area and complex channels. When the condensed gas rises from the collection chamber 13 to the top and flows through the wire mesh demister 5, water droplets in the gas collide with and adhere to the wire mesh surface. As the water droplets accumulate, when gravity exceeds the carrying capacity of the gas, the droplets flow down the wire mesh, re-entering the collection chamber 13 and eventually flowing into the storage tank 2. The purified gas then passes through the wire mesh demister 5 and is discharged from the exhaust port 131, thereby achieving the capture and recovery of water droplets in the gas.

[0031] During installation: Securely install the main body 1 of the device, ensuring it is placed vertically. Connect the storage tank 2 to the bottom of the main body 1, ensuring a good seal at the connection to prevent solvent leakage. Connect the external pump body to one end of the condenser pipe 3 that extends out of the main body 1, ensuring a secure connection and unobstructed flow.

[0032] Cooling water circulation: Cooling water is injected into the outer cooling water layer 11, microfluidic channel 41 and inner cooling water layer 12 through the liquid inlet 111. After the cooling water is full, the external circulation system can be started by connecting a water pump or other equipment, so that the cooling water flows from the outer cooling water layer 11 into the inner cooling water layer 12 through the microfluidic channel 41, and then is discharged from the liquid outlet 121, forming a stable water circulation.

[0033] Solvent recovery process: The solvent-containing gas enters the condenser pipe 3 through an external pipe. Inside the spiral condenser pipe 3, the gas undergoes preliminary heat exchange with the external cooling water layer 11, and some of the solvent gas is condensed into liquid, flowing into the bottom of the collection chamber 13 and entering the storage tank 2 through a connecting pipe. The gas that is not completely condensed rises into the collection chamber 13 and comes into contact with the multi-layer guide plates 4 during its ascent. Due to the cooling water circulation in the microfluidic channels 41 inside the guide plates 4, the gas undergoes secondary heat exchange with the guide plates 4 and is further condensed. After passing through the multi-layer guide plates 4, most of the solvent gas is condensed and recovered. Finally, after passing through the wire mesh demister 5, the remaining small amount of water droplets are captured, and the purified gas is discharged from the exhaust port 131.

[0034] Solvent Collection: When the recovered solvent in storage tank 2 reaches a certain amount, open the valve at the bottom opening to discharge the solvent for subsequent purification, storage, and other processing. During the solvent discharge process, the discharge rate can be controlled by flow control valves or other equipment as needed to prevent solvent splashing.

[0035] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0036] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A solvent recovery device, comprising a device body (1) and a storage tank (2) fixedly disposed at the bottom of the device body (1), wherein the device body (1) is provided with three cavities, namely an outer cold water layer (11) and an inner cold water layer (12), wherein a collection chamber (13) is located between the outer cold water layer (11) and the inner cold water layer (12), and the collection chamber (13) is connected to the storage tank (2), wherein an exhaust port (131) is provided at the top of the collection chamber (13). Two spiral condensing pipes (3) are installed inside the external cold water layer (11). One end of the condensing pipe (3) passes through the external cold water layer (11) and is connected to the bottom of the collection chamber (13), while the other end passes through the main body of the device (1) and is connected to the external pump body. The collection chamber (13) is equipped with a multi-layer guide plate (4), which is composed of multiple inclined plates; Its features are: The guide plate (4) has a microfluidic channel (41) inside. Both ends of the microfluidic channel (41) are connected to the outer cold water layer (11) and the inner cold water layer (12) through pipes. When the gas passes through the guide plate (4), the guide plate (4) condenses the gas again.

2. The solvent recovery device according to claim 1, characterized in that: The microfluidic channels (41) are distributed in a honeycomb or grid pattern and cover the heated area of ​​the guide plate (4).

3. The solvent recovery device according to claim 1, characterized in that: The outer cooling water layer (11) has an inlet (111) at the bottom and the inner cooling water layer (12) has an outlet (121) at the top.

4. The solvent recovery device according to claim 1, characterized in that: The storage tank (2) has an opening at the bottom and a valve at the opening.

5. The solvent recovery device according to claim 1, characterized in that: The collection chamber (13) is cone-shaped with a smaller top and a larger bottom.

6. The solvent recovery device according to claim 1, characterized in that: The solvent recovery device also includes a wire mesh demister (5) fixedly installed on the top of the collection chamber (13).

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